#!/usr/bin/env python #---------------------------------------------------------------------------- # Name: FCObjects.py # Purpose: Contains all the drawing objects FloatCanvas supports # # Author: # # Created: # Version: # Date: # Licence: # Tags: phoenix-port, unittest, documented, py3-port #---------------------------------------------------------------------------- """ This is where FloatCanvas defines its drawings objects. """ import sys import wx from wx.lib import six import numpy as N from .Utilities import BBox from wx.lib.floatcanvas.Utilities import Colors mac = sys.platform.startswith("darwin") ## A global variable to hold the Pixels per inch that wxWindows thinks is in use ## This is used for scaling fonts. ## This can't be computed on module __init__, because a wx.App might not have initialized yet. global FontScale def ComputeFontScale(): """ Compute the font scale. A global variable to hold the scaling from pixel size to point size. """ global FontScale dc = wx.ScreenDC() dc.SetFont(wx.Font(16, wx.FONTFAMILY_ROMAN, wx.FONTSTYLE_NORMAL, wx.FONTWEIGHT_NORMAL)) E = dc.GetTextExtent("X") FontScale = 16/E[1] del dc # why do we do this here, causes a Sphinx build crash #ComputeFontScale() ## fixme: This should probably be re-factored into a class _testBitmap = None _testDC = None def _cycleidxs(indexcount, maxvalue, step): """ Utility function used by _colorGenerator """ def colormatch(color): """Return True if the color comes back from the bitmap identically.""" if len(color) < 3: return True global _testBitmap, _testDC B = _testBitmap if not mac: dc = _testDC if not B: B = _testBitmap = wx.Bitmap(1, 1) if not mac: dc = _testDC = wx.MemoryDC() if mac: dc = wx.MemoryDC() dc.SelectObject(B) dc.SetBackground(wx.BLACK_BRUSH) dc.Clear() dc.SetPen(wx.Pen(wx.Colour(*color), 4)) dc.DrawPoint(0,0) if mac: del dc pdata = wx.AlphaPixelData(B) pacc = pdata.GetPixels() pacc.MoveTo(pdata, 0, 0) outcolor = pacc.Get()[:3] else: outcolor = dc.GetPixel(0,0) return outcolor == color if indexcount == 0: yield () else: for idx in range(0, maxvalue, step): for tail in _cycleidxs(indexcount - 1, maxvalue, step): color = (idx, ) + tail if not colormatch(color): continue yield color def _colorGenerator(): """ Generates a series of unique colors used to do hit-tests with the Hit Test bitmap """ return _cycleidxs(indexcount=3, maxvalue=256, step=1) class DrawObject: """ This is the base class for all the objects that can be drawn. One must subclass from this (and an assortment of Mixins) to create a new DrawObject, see for example :class:`~lib.floatcanvas.FloatCanvas.Circle`. """ #This class contains a series of static dictionaries: #* BrushList #* PenList #* FillStyleList #* LineStyleList def __init__(self, InForeground = False, IsVisible = True): """ Default class constructor. :param boolean `InForeground`: Define if object should be in foreground or not :param boolean `IsVisible`: Define if object should be visible """ self.InForeground = InForeground self._Canvas = None self.HitColor = None self.CallBackFuncs = {} ## these are the defaults self.HitAble = False self.HitLine = True self.HitFill = True self.MinHitLineWidth = 3 self.HitLineWidth = 3 ## this gets re-set by the subclasses if necessary self.Brush = None self.Pen = None self.FillStyle = "Solid" self.Visible = IsVisible # I pre-define all these as class variables to provide an easier # interface, and perhaps speed things up by caching all the Pens # and Brushes, although that may not help, as I think wx now # does that on it's own. Send me a note if you know! BrushList = { ( None, "Transparent") : wx.TRANSPARENT_BRUSH, ("Blue", "Solid") : wx.BLUE_BRUSH, ("Green", "Solid") : wx.GREEN_BRUSH, ("White", "Solid") : wx.WHITE_BRUSH, ("Black", "Solid") : wx.BLACK_BRUSH, ("Grey", "Solid") : wx.GREY_BRUSH, ("MediumGrey", "Solid") : wx.MEDIUM_GREY_BRUSH, ("LightGrey", "Solid") : wx.LIGHT_GREY_BRUSH, ("Cyan", "Solid") : wx.CYAN_BRUSH, ("Red", "Solid") : wx.RED_BRUSH } PenList = { (None, "Transparent", 1) : wx.TRANSPARENT_PEN, ("Green", "Solid", 1) : wx.GREEN_PEN, ("White", "Solid", 1) : wx.WHITE_PEN, ("Black", "Solid", 1) : wx.BLACK_PEN, ("Grey", "Solid", 1) : wx.GREY_PEN, ("MediumGrey", "Solid", 1) : wx.MEDIUM_GREY_PEN, ("LightGrey", "Solid", 1) : wx.LIGHT_GREY_PEN, ("Cyan", "Solid", 1) : wx.CYAN_PEN, ("Red", "Solid", 1) : wx.RED_PEN } FillStyleList = { "Transparent" : wx.BRUSHSTYLE_TRANSPARENT, "Solid" : wx.BRUSHSTYLE_SOLID, "BiDiagonalHatch": wx.BRUSHSTYLE_BDIAGONAL_HATCH, "CrossDiagHatch" : wx.BRUSHSTYLE_CROSSDIAG_HATCH, "FDiagonal_Hatch": wx.BRUSHSTYLE_FDIAGONAL_HATCH, "CrossHatch" : wx.BRUSHSTYLE_CROSS_HATCH, "HorizontalHatch": wx.BRUSHSTYLE_HORIZONTAL_HATCH, "VerticalHatch" : wx.BRUSHSTYLE_VERTICAL_HATCH } LineStyleList = { "Solid" : wx.PENSTYLE_SOLID, "Transparent": wx.PENSTYLE_TRANSPARENT, "Dot" : wx.PENSTYLE_DOT, "LongDash" : wx.PENSTYLE_LONG_DASH, "ShortDash" : wx.PENSTYLE_SHORT_DASH, "DotDash" : wx.PENSTYLE_DOT_DASH, } def Bind(self, Event, CallBackFun): """ Bind an event to the DrawObject :param `Event`: see below for supported event types - EVT_FC_LEFT_DOWN - EVT_FC_LEFT_UP - EVT_FC_LEFT_DCLICK - EVT_FC_MIDDLE_DOWN - EVT_FC_MIDDLE_UP - EVT_FC_MIDDLE_DCLICK - EVT_FC_RIGHT_DOWN - EVT_FC_RIGHT_UP - EVT_FC_RIGHT_DCLICK - EVT_FC_ENTER_OBJECT - EVT_FC_LEAVE_OBJECT :param `CallBackFun`: the call back function for the event """ ##fixme: Way too much Canvas Manipulation here! self.CallBackFuncs[Event] = CallBackFun self.HitAble = True self._Canvas.UseHitTest = True if self.InForeground and self._Canvas._ForegroundHTBitmap is None: self._Canvas.MakeNewForegroundHTBitmap() elif self._Canvas._HTBitmap is None: self._Canvas.MakeNewHTBitmap() if not self.HitColor: if not self._Canvas.HitColorGenerator: # first call to prevent the background color from being used. self._Canvas.HitColorGenerator = _colorGenerator() if six.PY3: next(self._Canvas.HitColorGenerator) else: self._Canvas.HitColorGenerator.next() if six.PY3: self.HitColor = next(self._Canvas.HitColorGenerator) else: self.HitColor = self._Canvas.HitColorGenerator.next() self.SetHitPen(self.HitColor,self.HitLineWidth) self.SetHitBrush(self.HitColor) # put the object in the hit dict, indexed by it's color if not self._Canvas.HitDict: self._Canvas.MakeHitDict() self._Canvas.HitDict[Event][self.HitColor] = (self) # put the object in the hit dict, indexed by its color def UnBindAll(self): """ Unbind all events .. note:: Currently only removes one from each list """ ## fixme: this only removes one from each list, there could be more. ## + patch by Tim Ansel if self._Canvas.HitDict: for Event in self._Canvas.HitDict.itervalues(): try: del Event[self.HitColor] except KeyError: pass self.HitAble = False def SetBrush(self, FillColor, FillStyle): """ Set the brush for this DrawObject :param `FillColor`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetColor` for valid entries :param `FillStyle`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetFillStyle` for valid entries """ if FillColor is None or FillStyle is None: self.Brush = wx.TRANSPARENT_BRUSH ##fixme: should I really re-set the style? self.FillStyle = "Transparent" else: self.Brush = self.BrushList.setdefault( (FillColor, FillStyle), wx.Brush(FillColor, self.FillStyleList[FillStyle])) #print("Setting Brush, BrushList length:", len(self.BrushList)) def SetPen(self, LineColor, LineStyle, LineWidth): """ Set the Pen for this DrawObject :param `LineColor`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetColor` for valid entries :param `LineStyle`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetLineStyle` for valid entries :param integer `LineWidth`: the width in pixels """ if (LineColor is None) or (LineStyle is None): self.Pen = wx.TRANSPARENT_PEN self.LineStyle = 'Transparent' else: self.Pen = self.PenList.setdefault( (LineColor, LineStyle, LineWidth), wx.Pen(LineColor, LineWidth, self.LineStyleList[LineStyle])) def SetHitBrush(self, HitColor): """ Set the brush used for hit test, do not call directly. :param `HitColor`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetColor` """ if not self.HitFill: self.HitBrush = wx.TRANSPARENT_BRUSH else: self.HitBrush = self.BrushList.setdefault( (HitColor,"solid"), wx.Brush(HitColor, self.FillStyleList["Solid"])) def SetHitPen(self, HitColor, LineWidth): """ Set the pen used for hit test, do not call directly. :param `HitColor`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetColor` :param integer `LineWidth`: the line width in pixels """ if not self.HitLine: self.HitPen = wx.TRANSPARENT_PEN else: self.HitPen = self.PenList.setdefault( (HitColor, "solid", self.HitLineWidth), wx.Pen(HitColor, self.HitLineWidth, self.LineStyleList["Solid"]) ) ## Just to make sure that they will always be there ## the appropriate ones should be overridden in the subclasses def SetColor(self, Color): """ Set the Color - this method is overridden in the subclasses :param `Color`: use one of the following values any valid entry from :class:`ColourDatabase` - ``Green`` - ``White`` - ``Black`` - ``Grey`` - ``MediumGrey`` - ``LightGrey`` - ``Cyan`` - ``Red`` """ pass def SetLineColor(self, LineColor): """ Set the LineColor - this method is overridden in the subclasses :param `LineColor`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetColor` for valid values """ pass def SetLineStyle(self, LineStyle): """ Set the LineStyle - this method is overridden in the subclasses :param `LineStyle`: Use one of the following values or ``None`` : ===================== ============================= Style Description ===================== ============================= ``Solid`` Solid line ``Transparent`` A transparent line ``Dot`` Dotted line ``LongDash`` Dashed line (long) ``ShortDash`` Dashed line (short) ``DotDash`` Dash-dot-dash line ===================== ============================= """ pass def SetLineWidth(self, LineWidth): """ Set the LineWidth :param integer `LineWidth`: sets the line width in pixel """ pass def SetFillColor(self, FillColor): """ Set the FillColor - this method is overridden in the subclasses :param `FillColor`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetColor` for valid values """ pass def SetFillStyle(self, FillStyle): """ Set the FillStyle - this method is overridden in the subclasses :param string `FillStyle`: following is a list of valid values: ===================== ========================================= Style Description ===================== ========================================= ``Transparent`` Transparent fill ``Solid`` Solid fill ``BiDiagonalHatch`` Bi Diagonal hatch fill ``CrossDiagHatch`` Cross Diagonal hatch fill ``FDiagonal_Hatch`` F Diagonal hatch fill ``CrossHatch`` Cross hatch fill ``HorizontalHatch`` Horizontal hatch fill ``VerticalHatch`` Vertical hatch fill ===================== ========================================= """ pass def PutInBackground(self): """Put the object in the background.""" if self._Canvas and self.InForeground: self._Canvas._ForeDrawList.remove(self) self._Canvas._DrawList.append(self) self._Canvas._BackgroundDirty = True self.InForeground = False def PutInForeground(self): """Put the object in the foreground.""" if self._Canvas and (not self.InForeground): self._Canvas._ForeDrawList.append(self) self._Canvas._DrawList.remove(self) self._Canvas._BackgroundDirty = True self.InForeground = True def Hide(self): """Hide the object.""" self.Visible = False def Show(self): """Show the object.""" self.Visible = True class ColorOnlyMixin: """ Mixin class for objects that have just one color, rather than a fill color and line color """ def SetColor(self, Color): """ Set the Color :param `Color`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetColor` for valid values """ self.SetPen(Color,"Solid",1) self.SetBrush(Color,"Solid") SetFillColor = SetColor # Just to provide a consistant interface class LineOnlyMixin: """ Mixin class for objects that have just a line, rather than a fill color and line color """ def SetLineColor(self, LineColor): """ Set the LineColor :param `LineColor`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetColor` for valid values """ self.LineColor = LineColor self.SetPen(LineColor,self.LineStyle,self.LineWidth) SetColor = SetLineColor# so that it will do something reasonable def SetLineStyle(self, LineStyle): """ Set the LineStyle :param `LineStyle`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetLineStyle` for valid values """ self.LineStyle = LineStyle self.SetPen(self.LineColor,LineStyle,self.LineWidth) def SetLineWidth(self, LineWidth): """ Set the LineWidth :param integer `LineWidth`: line width in pixels """ self.LineWidth = LineWidth self.SetPen(self.LineColor,self.LineStyle,LineWidth) class LineAndFillMixin(LineOnlyMixin): """ Mixin class for objects that have both a line and a fill color and style. """ def SetFillColor(self, FillColor): """ Set the FillColor :param `FillColor`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetColor` for valid values """ self.FillColor = FillColor self.SetBrush(FillColor, self.FillStyle) def SetFillStyle(self, FillStyle): """ Set the FillStyle :param `FillStyle`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetFillStyle` for valid values """ self.FillStyle = FillStyle self.SetBrush(self.FillColor,FillStyle) def SetUpDraw(self, dc, WorldToPixel, ScaleWorldToPixel, HTdc): """ Setup for draw :param `dc`: the dc to draw ??? :param `WorldToPixel`: ??? :param `ScaleWorldToPixel`: ??? :param `HTdc`: ??? """ dc.SetPen(self.Pen) dc.SetBrush(self.Brush) if HTdc and self.HitAble: HTdc.SetPen(self.HitPen) HTdc.SetBrush(self.HitBrush) return ( WorldToPixel(self.XY), ScaleWorldToPixel(self.WH) ) class XYObjectMixin: """ This is a mixin class that provides some methods suitable for use with objects that have a single (x,y) coordinate pair. """ def Move(self, Delta): """ Moves the object by delta, where delta is a (dx, dy) pair. :param `Delta`: is a (dx, dy) pair ideally a `NumPy `_ array of shape (2, ) """ Delta = N.asarray(Delta, N.float) self.XY += Delta self.BoundingBox += Delta if self._Canvas: self._Canvas.BoundingBoxDirty = True def CalcBoundingBox(self): """Calculate the bounding box.""" ## This may get overwritten in some subclasses self.BoundingBox = BBox.asBBox((self.XY, self.XY)) def SetPoint(self, xy): xy = N.array(xy, N.float) xy.shape = (2,) self.XY = xy self.CalcBoundingBox() if self._Canvas: self._Canvas.BoundingBoxDirty = True class PointsObjectMixin: """ A mixin class that provides some methods suitable for use with objects that have a set of (x, y) coordinate pairs. """ def Move(self, Delta): """ Moves the object by delta, where delta is a (dx, dy) pair. :param `Delta`: is a (dx, dy) pair ideally a `NumPy `_ array of shape (2, ) """ Delta = N.asarray(Delta, N.float) Delta.shape = (2,) self.Points += Delta self.BoundingBox += Delta if self._Canvas: self._Canvas.BoundingBoxDirty = True def CalcBoundingBox(self): """Calculate the bounding box.""" self.BoundingBox = BBox.fromPoints(self.Points) if self._Canvas: self._Canvas.BoundingBoxDirty = True def SetPoints(self, Points, copy=True): """ Sets the coordinates of the points of the object to Points (NX2 array). :param `Points`: takes a 2-tuple, or a (2,) `NumPy `_ array of point coordinates :param boolean `copy`: By default, a copy is made, if copy is set to ``False``, a reference is used, if Points is a NumPy array of Floats. This allows you to change some or all of the points without making any copies. For example:: Points = Object.Points # shifts the points 5 in the x dir, and 10 in the y dir. Points += (5, 10) # Sets the points to the same array as it was Object.SetPoints(Points, False) """ if copy: self.Points = N.array(Points, N.float) self.Points.shape = (-1, 2) # Make sure it is a NX2 array, even if there is only one point else: self.Points = N.asarray(Points, N.float) self.CalcBoundingBox() class Polygon(PointsObjectMixin, LineAndFillMixin, DrawObject): """ Draws a polygon Points is a list of 2-tuples, or a NX2 NumPy array of point coordinates. so that Points[N][0] is the x-coordinate of point N and Points[N][1] is the y-coordinate or Points[N,0] is the x-coordinate of point N and Points[N,1] is the y-coordinate for arrays. """ def __init__(self, Points, LineColor = "Black", LineStyle = "Solid", LineWidth = 1, FillColor = None, FillStyle = "Solid", InForeground = False): """ Default class constructor. :param `Points`: start point, takes a 2-tuple, or a (2,) `NumPy `_ array of point coordinates :param `LineColor`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetColor` :param `LineStyle`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetLineStyle` :param `LineWidth`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetLineWidth` :param `FillColor`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetColor` :param `FillStyle`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetFillStyle` :param boolean `InForeground`: should object be in foreground """ DrawObject.__init__(self, InForeground) self.Points = N.array(Points ,N.float) # this DOES need to make a copy self.CalcBoundingBox() self.LineColor = LineColor self.LineStyle = LineStyle self.LineWidth = LineWidth self.FillColor = FillColor self.FillStyle = FillStyle self.HitLineWidth = max(LineWidth,self.MinHitLineWidth) self.SetPen(LineColor,LineStyle,LineWidth) self.SetBrush(FillColor,FillStyle) def _Draw(self, dc , WorldToPixel, ScaleWorldToPixel = None, HTdc=None): Points = WorldToPixel(self.Points)#.tolist() dc.SetPen(self.Pen) dc.SetBrush(self.Brush) dc.DrawPolygon(Points) if HTdc and self.HitAble: HTdc.SetPen(self.HitPen) HTdc.SetBrush(self.HitBrush) HTdc.DrawPolygon(Points) class Line(PointsObjectMixin, LineOnlyMixin, DrawObject): """ Draws a line It will draw a straight line if there are two points, and a polyline if there are more than two. """ def __init__(self, Points, LineColor = "Black", LineStyle = "Solid", LineWidth = 1, InForeground = False): """ Default class constructor. :param `Points`: takes a 2-tuple, or a (2,) `NumPy `_ array of point coordinates :param `LineColor`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetColor` :param `LineStyle`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetLineStyle` :param `LineWidth`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetLineWidth` :param boolean `InForeground`: should object be in foreground """ DrawObject.__init__(self, InForeground) self.Points = N.array(Points,N.float) self.CalcBoundingBox() self.LineColor = LineColor self.LineStyle = LineStyle self.LineWidth = LineWidth self.SetPen(LineColor,LineStyle,LineWidth) self.HitLineWidth = max(LineWidth,self.MinHitLineWidth) def _Draw(self, dc , WorldToPixel, ScaleWorldToPixel, HTdc=None): Points = WorldToPixel(self.Points) dc.SetPen(self.Pen) dc.DrawLines(Points) if HTdc and self.HitAble: HTdc.SetPen(self.HitPen) HTdc.DrawLines(Points) class Spline(Line): """Draws a spline""" def __init__(self, *args, **kwargs): """ Default class constructor. see :class:`~lib.floatcanvas.FloatCanvas.Line` """ Line.__init__(self, *args, **kwargs) def _Draw(self, dc , WorldToPixel, ScaleWorldToPixel, HTdc=None): Points = WorldToPixel(self.Points) dc.SetPen(self.Pen) dc.DrawSpline(Points) if HTdc and self.HitAble: HTdc.SetPen(self.HitPen) HTdc.DrawSpline(Points) class Arrow(XYObjectMixin, LineOnlyMixin, DrawObject): """ Draws an arrow It will draw an arrow , starting at the point ``XY`` points at an angle defined by ``Direction``. """ def __init__(self, XY, Length, Direction, LineColor = "Black", LineStyle = "Solid", LineWidth = 2, ArrowHeadSize = 8, ArrowHeadAngle = 30, InForeground = False): """ Default class constructor. :param `XY`: the (x, y) coordinate of the starting point, or a 2-tuple, or a (2,) `NumPy `_ array :param integer `Length`: length of arrow in pixels :param integer `Direction`: angle of arrow in degrees, zero is straight up `+` angle is to the right :param `LineColor`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetColor` :param `LineStyle`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetLineStyle` :param `LineWidth`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetLineWidth` :param `ArrowHeadSize`: size of arrow head in pixels :param `ArrowHeadAngle`: angle of arrow head in degrees :param boolean `InForeground`: should object be in foreground """ DrawObject.__init__(self, InForeground) self.XY = N.array(XY, N.float) self.XY.shape = (2,) # Make sure it is a length 2 vector self.Length = Length self.Direction = float(Direction) self.ArrowHeadSize = ArrowHeadSize self.ArrowHeadAngle = float(ArrowHeadAngle) self.CalcArrowPoints() self.CalcBoundingBox() self.LineColor = LineColor self.LineStyle = LineStyle self.LineWidth = LineWidth self.SetPen(LineColor,LineStyle,LineWidth) ##fixme: How should the HitTest be drawn? self.HitLineWidth = max(LineWidth,self.MinHitLineWidth) def SetDirection(self, Direction): """ Set the direction :param integer `Direction`: angle of arrow in degrees, zero is straight up `+` angle is to the right """ self.Direction = float(Direction) self.CalcArrowPoints() def SetLength(self, Length): """ Set the length :param integer `Length`: length of arrow in pixels """ self.Length = Length self.CalcArrowPoints() def SetLengthDirection(self, Length, Direction): """ Set the lenght and direction :param integer `Length`: length of arrow in pixels :param integer `Direction`: angle of arrow in degrees, zero is straight up `+` angle is to the right """ self.Direction = float(Direction) self.Length = Length self.CalcArrowPoints() ## def CalcArrowPoints(self): ## L = self.Length ## S = self.ArrowHeadSize ## phi = self.ArrowHeadAngle * N.pi / 360 ## theta = (self.Direction-90.0) * N.pi / 180 ## ArrowPoints = N.array( ( (0, L, L - S*N.cos(phi),L, L - S*N.cos(phi) ), ## (0, 0, S*N.sin(phi), 0, -S*N.sin(phi) ) ), ## N.float ) ## RotationMatrix = N.array( ( ( N.cos(theta), -N.sin(theta) ), ## ( N.sin(theta), N.cos(theta) ) ), ## N.float ## ) ## ArrowPoints = N.matrixmultiply(RotationMatrix, ArrowPoints) ## self.ArrowPoints = N.transpose(ArrowPoints) def CalcArrowPoints(self): """Calculate the arrow points.""" L = self.Length S = self.ArrowHeadSize phi = self.ArrowHeadAngle * N.pi / 360 theta = (270 - self.Direction) * N.pi / 180 AP = N.array( ( (0,0), (0,0), (N.cos(theta - phi), -N.sin(theta - phi) ), (0,0), (N.cos(theta + phi), -N.sin(theta + phi) ), ), N.float ) AP *= S shift = (-L*N.cos(theta), L*N.sin(theta) ) AP[1:,:] += shift self.ArrowPoints = AP def _Draw(self, dc , WorldToPixel, ScaleWorldToPixel, HTdc=None): dc.SetPen(self.Pen) xy = WorldToPixel(self.XY) ArrowPoints = xy + self.ArrowPoints dc.DrawLines(ArrowPoints) if HTdc and self.HitAble: HTdc.SetPen(self.HitPen) HTdc.DrawLines(ArrowPoints) class ArrowLine(PointsObjectMixin, LineOnlyMixin, DrawObject): """ Draws an arrow line. It will draw a set of arrows from point to point. It takes a list of 2-tuples, or a NX2 NumPy Float array of point coordinates. """ def __init__(self, Points, LineColor = "Black", LineStyle = "Solid", LineWidth = 1, ArrowHeadSize = 8, ArrowHeadAngle = 30, InForeground = False): """ Default class constructor. :param `Points`: takes a 2-tuple, or a (2,) `NumPy `_ array of point coordinates :param `LineColor`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetColor` :param `LineStyle`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetLineStyle` :param `LineWidth`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetLineWidth` :param `ArrowHeadSize`: size of arrow head in pixels :param `ArrowHeadAngle`: angle of arrow head in degrees :param boolean `InForeground`: should object be in foreground """ DrawObject.__init__(self, InForeground) self.Points = N.asarray(Points,N.float) self.Points.shape = (-1,2) # Make sure it is a NX2 array, even if there is only one point self.ArrowHeadSize = ArrowHeadSize self.ArrowHeadAngle = float(ArrowHeadAngle) self.CalcArrowPoints() self.CalcBoundingBox() self.LineColor = LineColor self.LineStyle = LineStyle self.LineWidth = LineWidth self.SetPen(LineColor,LineStyle,LineWidth) self.HitLineWidth = max(LineWidth,self.MinHitLineWidth) def CalcArrowPoints(self): """Calculate the arrow points.""" S = self.ArrowHeadSize phi = self.ArrowHeadAngle * N.pi / 360 Points = self.Points n = Points.shape[0] self.ArrowPoints = N.zeros((n-1, 3, 2), N.float) for i in range(n-1): dx, dy = self.Points[i] - self.Points[i+1] theta = N.arctan2(dy, dx) AP = N.array( ( (N.cos(theta - phi), -N.sin(theta-phi)), (0,0), (N.cos(theta + phi), -N.sin(theta + phi)) ), N.float ) self.ArrowPoints[i,:,:] = AP self.ArrowPoints *= S def _Draw(self, dc , WorldToPixel, ScaleWorldToPixel, HTdc=None): Points = WorldToPixel(self.Points) ArrowPoints = Points[1:,N.newaxis,:] + self.ArrowPoints dc.SetPen(self.Pen) dc.DrawLines(Points) for arrow in ArrowPoints: dc.DrawLines(arrow) if HTdc and self.HitAble: HTdc.SetPen(self.HitPen) HTdc.DrawLines(Points) for arrow in ArrowPoints: HTdc.DrawLines(arrow) class PointSet(PointsObjectMixin, ColorOnlyMixin, DrawObject): """ Draws a set of points If Points is a sequence of tuples: Points[N][0] is the x-coordinate of point N and Points[N][1] is the y-coordinate. If Points is a NumPy array: Points[N,0] is the x-coordinate of point N and Points[N,1] is the y-coordinate for arrays. Each point will be drawn the same color and Diameter. The Diameter is in screen pixels, not world coordinates. The hit-test code does not distingish between the points, you will only know that one of the points got hit, not which one. You can use PointSet.FindClosestPoint(WorldPoint) to find out which one In the case of points, the HitLineWidth is used as diameter. """ def __init__(self, Points, Color="Black", Diameter=1, InForeground=False): """ Default class constructor. :param `Points`: takes a 2-tuple, or a (2,) `NumPy `_ array of point coordinates :param `Color`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetColor` :param integer `Diameter`: the points diameter :param boolean `InForeground`: should object be in foreground """ DrawObject.__init__(self, InForeground) self.Points = N.array(Points,N.float) self.Points.shape = (-1,2) # Make sure it is a NX2 array, even if there is only one point self.CalcBoundingBox() self.Diameter = Diameter self.HitLineWidth = min(self.MinHitLineWidth, Diameter) self.SetColor(Color) def SetDiameter(self, Diameter): """ Sets the diameter :param integer `Diameter`: the points diameter """ self.Diameter = Diameter def FindClosestPoint(self, XY): """ Returns the index of the closest point to the point, XY, given in World coordinates. It's essentially random which you get if there are more than one that are the same. This can be used to figure out which point got hit in a mouse binding callback, for instance. It's a lot faster that using a lot of separate points. :param `XY`: the (x,y) coordinates of the point to look for, it takes a 2-tuple or (2,) numpy array in World coordinates """ d = self.Points - XY return N.argmin(N.hypot(d[:,0],d[:,1])) def DrawD2(self, dc, Points): # A Little optimization for a diameter2 - point dc.DrawPointList(Points) dc.DrawPointList(Points + (1,0)) dc.DrawPointList(Points + (0,1)) dc.DrawPointList(Points + (1,1)) def _Draw(self, dc , WorldToPixel, ScaleWorldToPixel, HTdc=None): dc.SetPen(self.Pen) Points = WorldToPixel(self.Points) if self.Diameter <= 1: dc.DrawPointList(Points) elif self.Diameter <= 2: self.DrawD2(dc, Points) else: dc.SetBrush(self.Brush) radius = int(round(self.Diameter/2)) ##fixme: I really should add a DrawCircleList to wxPython if len(Points) > 100: xy = Points xywh = N.concatenate((xy-radius, N.ones(xy.shape) * self.Diameter ), 1 ) dc.DrawEllipseList(xywh) else: for xy in Points: dc.DrawCircle(xy[0],xy[1], radius) if HTdc and self.HitAble: HTdc.SetPen(self.HitPen) HTdc.SetBrush(self.HitBrush) if self.Diameter <= 1: HTdc.DrawPointList(Points) elif self.Diameter <= 2: self.DrawD2(HTdc, Points) else: if len(Points) > 100: xy = Points xywh = N.concatenate((xy-radius, N.ones(xy.shape) * self.Diameter ), 1 ) HTdc.DrawEllipseList(xywh) else: for xy in Points: HTdc.DrawCircle(xy[0],xy[1], radius) class Point(XYObjectMixin, ColorOnlyMixin, DrawObject): """ A point DrawObject .. note:: The Bounding box is just the point, and doesn't include the Diameter. The HitLineWidth is used as diameter for the Hit Test. """ def __init__(self, XY, Color="Black", Diameter=1, InForeground=False): """ Default class constructor. :param `XY`: the (x, y) coordinate of the center of the point, or a 2-tuple, or a (2,) `NumPy `_ array :param `Color`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetColor` :param integer `Diameter`: in screen points :param `InForeground`: define if object is in foreground """ DrawObject.__init__(self, InForeground) self.XY = N.array(XY, N.float) self.XY.shape = (2,) # Make sure it is a length 2 vector self.CalcBoundingBox() self.SetColor(Color) self.Diameter = Diameter self.HitLineWidth = self.MinHitLineWidth def SetDiameter(self, Diameter): """ Set the diameter of the object. :param integer `Diameter`: in screen points """ self.Diameter = Diameter def _Draw(self, dc, WorldToPixel, ScaleWorldToPixel, HTdc=None): dc.SetPen(self.Pen) xy = WorldToPixel(self.XY) if self.Diameter <= 1: dc.DrawPoint(xy[0], xy[1]) else: dc.SetBrush(self.Brush) radius = int(round(self.Diameter/2)) dc.DrawCircle(xy[0],xy[1], radius) if HTdc and self.HitAble: HTdc.SetPen(self.HitPen) if self.Diameter <= 1: HTdc.DrawPoint(xy[0], xy[1]) else: HTdc.SetBrush(self.HitBrush) HTdc.DrawCircle(xy[0],xy[1], radius) class SquarePoint(XYObjectMixin, ColorOnlyMixin, DrawObject): """ Draws a square point The Size is in screen points, not world coordinates, so the Bounding box is just the point, and doesn't include the Size. The HitLineWidth is used as diameter for the Hit Test. """ def __init__(self, Point, Color="Black", Size=4, InForeground=False): """ Default class constructor. :param `Point`: takes a 2-tuple, or a (2,) `NumPy `_ array of point coordinates :param `Color`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetColor` :param integer `Size`: the size of the square point :param boolean `InForeground`: should object be in foreground """ DrawObject.__init__(self, InForeground) self.XY = N.array(Point, N.float) self.XY.shape = (2,) # Make sure it is a length 2 vector self.CalcBoundingBox() self.SetColor(Color) self.Size = Size self.HitLineWidth = self.MinHitLineWidth def SetSize(self, Size): """ Sets the size :param integer `Size`: the size of the square point """ self.Size = Size def _Draw(self, dc , WorldToPixel, ScaleWorldToPixel, HTdc=None): Size = self.Size dc.SetPen(self.Pen) xc,yc = WorldToPixel(self.XY) if self.Size <= 1: dc.DrawPoint(xc, yc) else: x = xc - Size/2.0 y = yc - Size/2.0 dc.SetBrush(self.Brush) dc.DrawRectangle(x, y, Size, Size) if HTdc and self.HitAble: HTdc.SetPen(self.HitPen) if self.Size <= 1: HTdc.DrawPoint(xc, xc) else: HTdc.SetBrush(self.HitBrush) HTdc.DrawRectangle(x, y, Size, Size) class RectEllipse(XYObjectMixin, LineAndFillMixin, DrawObject): """A RectEllipse draw object.""" def __init__(self, XY, WH, LineColor = "Black", LineStyle = "Solid", LineWidth = 1, FillColor = None, FillStyle = "Solid", InForeground = False): """ Default class constructor. :param `XY`: the (x, y) coordinate of the corner of RectEllipse, or a 2-tuple, or a (2,) `NumPy `_ array :param `WH`: a tuple with the Width and Height for the object :param `LineColor`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetColor` :param `LineStyle`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetLineStyle` :param `LineWidth`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetLineWidth` :param `FillColor`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetColor` :param `FillStyle`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetFillStyle` :param `InForeground`: put object in foreground """ DrawObject.__init__(self,InForeground) self.SetShape(XY, WH) self.LineColor = LineColor self.LineStyle = LineStyle self.LineWidth = LineWidth self.FillColor = FillColor self.FillStyle = FillStyle self.HitLineWidth = max(LineWidth,self.MinHitLineWidth) # these define the behaviour when zooming makes the objects really small. self.MinSize = 1 self.DisappearWhenSmall = True self.SetPen(LineColor,LineStyle,LineWidth) self.SetBrush(FillColor,FillStyle) def SetShape(self, XY, WH): """ Set the shape of the object. :param `XY`: takes a 2-tuple, or a (2,) `NumPy `_ array of point coordinates :param `WH`: a tuple with the Width and Height for the object """ self.XY = N.array( XY, N.float) self.XY.shape = (2,) self.WH = N.array( WH, N.float) self.WH.shape = (2,) self.CalcBoundingBox() def CalcBoundingBox(self): """Calculate the bounding box.""" # you need this in case Width or Height are negative corners = N.array((self.XY, (self.XY + self.WH) ), N.float) self.BoundingBox = BBox.fromPoints(corners) if self._Canvas: self._Canvas.BoundingBoxDirty = True class Rectangle(RectEllipse): """Draws a rectangle see :class:`~lib.floatcanvas.FloatCanvas.RectEllipse`""" def _Draw(self, dc , WorldToPixel, ScaleWorldToPixel, HTdc=None): ( XY, WH ) = self.SetUpDraw(dc, WorldToPixel, ScaleWorldToPixel, HTdc) WH[N.abs(WH) < self.MinSize] = self.MinSize if not( self.DisappearWhenSmall and N.abs(WH).min() <= self.MinSize) : # don't try to draw it too tiny dc.DrawRectangle(XY, WH) if HTdc and self.HitAble: HTdc.DrawRectangle(XY, WH) class Ellipse(RectEllipse): """Draws an ellipse see :class:`~lib.floatcanvas.FloatCanvas.RectEllipse`""" def _Draw(self, dc , WorldToPixel, ScaleWorldToPixel, HTdc=None): ( XY, WH ) = self.SetUpDraw(dc, WorldToPixel, ScaleWorldToPixel, HTdc) WH[N.abs(WH) < self.MinSize] = self.MinSize if not( self.DisappearWhenSmall and N.abs(WH).min() <= self.MinSize) : # don't try to draw it too tiny dc.DrawEllipse(XY, WH) if HTdc and self.HitAble: HTdc.DrawEllipse(XY, WH) class Circle(XYObjectMixin, LineAndFillMixin, DrawObject): """Draws a circle""" def __init__(self, XY, Diameter, LineColor = "Black", LineStyle = "Solid", LineWidth = 1, FillColor = None, FillStyle = "Solid", InForeground = False): """ Default class constructor. :param `XY`: the (x, y) coordinate of the center of the circle, or a 2-tuple, or a (2,) `NumPy `_ array :param integer `Diameter`: the diameter for the object :param `LineColor`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetColor` :param `LineStyle`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetLineStyle` :param `LineWidth`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetLineWidth` :param `FillColor`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetColor` :param `FillStyle`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetFillStyle` :param boolean `InForeground`: should object be in foreground """ DrawObject.__init__(self, InForeground) self.XY = N.array(XY, N.float) self.WH = N.array((Diameter/2, Diameter/2), N.float) # just to keep it compatible with others self.CalcBoundingBox() self.LineColor = LineColor self.LineStyle = LineStyle self.LineWidth = LineWidth self.FillColor = FillColor self.FillStyle = FillStyle self.HitLineWidth = max(LineWidth,self.MinHitLineWidth) # these define the behaviour when zooming makes the objects really small. self.MinSize = 1 self.DisappearWhenSmall = True self.SetPen(LineColor,LineStyle,LineWidth) self.SetBrush(FillColor,FillStyle) def SetDiameter(self, Diameter): """ Set the diameter of the object :param integer `Diameter`: the diameter for the object """ self.WH = N.array((Diameter/2, Diameter/2), N.float) # just to keep it compatible with others def CalcBoundingBox(self): """Calculate the bounding box of the object.""" # you need this in case Width or Height are negative self.BoundingBox = BBox.fromPoints( (self.XY+self.WH, self.XY-self.WH) ) if self._Canvas: self._Canvas.BoundingBoxDirty = True def _Draw(self, dc , WorldToPixel, ScaleWorldToPixel, HTdc=None): ( XY, WH ) = self.SetUpDraw(dc, WorldToPixel, ScaleWorldToPixel, HTdc) WH[N.abs(WH) < self.MinSize] = self.MinSize if not( self.DisappearWhenSmall and N.abs(WH).min() <= self.MinSize) : # don't try to draw it too tiny dc.DrawCircle(XY, WH[0]) if HTdc and self.HitAble: HTdc.DrawCircle(XY, WH[0]) class TextObjectMixin(XYObjectMixin): """ A mix in class that holds attributes and methods that are needed by the Text objects """ ## I'm caching fonts, because on GTK, getting a new font can take a ## while. However, it gets cleared after every full draw as hanging ## on to a bunch of large fonts takes a massive amount of memory. FontList = {} LayoutFontSize = 16 # font size used for calculating layout def SetFont(self, Size, Family, Style, Weight, Underlined, FaceName): self.Font = self.FontList.setdefault( (Size, Family, Style, Weight, Underlined, FaceName), #wx.FontFromPixelSize((0.45*Size,Size), # this seemed to give a decent height/width ratio on Windows wx.Font(Size, Family, Style, Weight, Underlined, FaceName) ) def SetColor(self, Color): self.Color = Color def SetBackgroundColor(self, BackgroundColor): self.BackgroundColor = BackgroundColor def SetText(self, String): """ Re-sets the text displayed by the object In the case of the ScaledTextBox, it will re-do the layout as appropriate Note: only tested with the ScaledTextBox """ self.String = String self.LayoutText() def LayoutText(self): """ A dummy method to re-do the layout of the text. A derived object needs to override this if required. """ pass ## store the function that shift the coords for drawing text. The ## "c" parameter is the correction for world coordinates, rather ## than pixel coords as the y axis is reversed ## pad is the extra space around the text ## if world = 1, the vertical shift is done in y-up coordinates ShiftFunDict = {'tl': lambda x, y, w, h, world=0, pad=0: (x + pad, y + pad - 2*world*pad), 'tc': lambda x, y, w, h, world=0, pad=0: (x - w/2, y + pad - 2*world*pad), 'tr': lambda x, y, w, h, world=0, pad=0: (x - w - pad, y + pad - 2*world*pad), 'cl': lambda x, y, w, h, world=0, pad=0: (x + pad, y - h/2 + world*h), 'cc': lambda x, y, w, h, world=0, pad=0: (x - w/2, y - h/2 + world*h), 'cr': lambda x, y, w, h, world=0, pad=0: (x - w - pad, y - h/2 + world*h), 'bl': lambda x, y, w, h, world=0, pad=0: (x + pad, y - h + 2*world*h - pad + world*2*pad) , 'bc': lambda x, y, w, h, world=0, pad=0: (x - w/2, y - h + 2*world*h - pad + world*2*pad) , 'br': lambda x, y, w, h, world=0, pad=0: (x - w - pad, y - h + 2*world*h - pad + world*2*pad)} class Text(TextObjectMixin, DrawObject): """ Draws a text object The size is fixed, and does not scale with the drawing. The hit-test is done on the entire text extent """ def __init__(self, String, xy, Size = 14, Color = "Black", BackgroundColor = None, Family = wx.FONTFAMILY_MODERN, Style = wx.FONTSTYLE_NORMAL, Weight = wx.FONTWEIGHT_NORMAL, Underlined = False, Position = 'tl', InForeground = False, Font = None): """ Default class constructor. :param string `string`: the text to draw :param `XY`: the (x, y) coordinate of the corner of the text, or a 2-tuple, or a (2,) `NumPy `_ array :param `Size`: the font size :param `Color`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetColor` :param `BackgroundColor`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetColor` :param FontFamily `Family`: a valid :ref:`FontFamily` :param FontStyle `Style`: a valid :ref:`FontStyle` :param FontWeight `Weight`: a valid :ref:`FontWeight` :param boolean `Underlined`: underline the text :param string `Position`: a two character string indicating where in relation to the coordinates the box should be oriented :param boolean `InForeground`: should object be in foreground :param Font `Font`: alternatively you can define :ref:`Font` and the above will be ignored. ============== ========================== 1st character Meaning ============== ========================== ``t`` top ``c`` center ``b`` bottom ============== ========================== ============== ========================== 2nd character Meaning ============== ========================== ``l`` left ``c`` center ``r`` right ============== ========================== :param Font `Font`: a valid :class:`Font` :param boolean `InForeground`: should object be in foreground """ DrawObject.__init__(self,InForeground) self.String = String # Input size in in Pixels, compute points size from FontScaleinfo. # fixme: for printing, we'll have to do something a little different self.Size = Size * FontScale self.Color = Color self.BackgroundColor = BackgroundColor if not Font: FaceName = '' else: FaceName = Font.GetFaceName() Family = Font.GetFamily() Size = Font.GetPointSize() Style = Font.GetStyle() Underlined = Font.GetUnderlined() Weight = Font.GetWeight() self.SetFont(Size, Family, Style, Weight, Underlined, FaceName) self.BoundingBox = BBox.asBBox((xy, xy)) self.XY = N.asarray(xy) self.XY.shape = (2,) (self.TextWidth, self.TextHeight) = (None, None) self.ShiftFun = self.ShiftFunDict[Position] def _Draw(self, dc , WorldToPixel, ScaleWorldToPixel, HTdc=None): XY = WorldToPixel(self.XY) dc.SetFont(self.Font) dc.SetTextForeground(self.Color) if self.BackgroundColor: dc.SetBackgroundMode(wx.SOLID) dc.SetTextBackground(self.BackgroundColor) else: dc.SetBackgroundMode(wx.TRANSPARENT) if self.TextWidth is None or self.TextHeight is None: (self.TextWidth, self.TextHeight) = dc.GetTextExtent(self.String) XY = self.ShiftFun(XY[0], XY[1], self.TextWidth, self.TextHeight) dc.DrawText(self.String, XY) if HTdc and self.HitAble: HTdc.SetPen(self.HitPen) HTdc.SetBrush(self.HitBrush) HTdc.DrawRectangle(XY, (self.TextWidth, self.TextHeight) ) class ScaledText(TextObjectMixin, DrawObject): """ ##fixme: this can be depricated and jsut use ScaledTextBox with different defaults. This class creates a text object that is scaled when zoomed. It is placed at the coordinates, x,y. the "Position" argument is a two charactor string, indicating where in relation to the coordinates the string should be oriented. The first letter is: t, c, or b, for top, center and bottom The second letter is: l, c, or r, for left, center and right The position refers to the position relative to the text itself. It defaults to "tl" (top left). Size is the size of the font in world coordinates. * Family: Font family, a generic way of referring to fonts without specifying actual facename. One of: * wx.FONTFAMILY_DEFAULT: Chooses a default font. * wx.FONTFAMILY_DECORATIVE: A decorative font. * wx.FONTFAMILY_ROMAN: A formal, serif font. * wx.FONTFAMILY_SCRIPT: A handwriting font. * wx.FONTFAMILY_SWISS: A sans-serif font. * wx.FONTFAMILY_MODERN: A fixed pitch font. .. note:: these are only as good as the wxWindows defaults, which aren't so good. * Style: One of wx.FONTSTYLE_NORMAL, wx.FONTSTYLE_SLANT and wx.FONTSTYLE_ITALIC. * Weight: One of wx.FONTWEIGHT_NORMAL, wx.FONTWEIGHT_LIGHT and wx.FONTWEIGHT_BOLD. * Underlined: The value can be True or False. At present this may have an an effect on Windows only. Alternatively, you can set the kw arg: Font, to a wx.Font, and the above will be ignored. The size of the font you specify will be ignored, but the rest of its attributes will be preserved. The size will scale as the drawing is zoomed. Bugs/Limitations: As fonts are scaled, the do end up a little different, so you don't get exactly the same picture as you scale up and doen, but it's pretty darn close. On wxGTK1 on my Linux system, at least, using a font of over about 3000 pts. brings the system to a halt. It's the Font Server using huge amounts of memory. My work around is to max the font size to 3000 points, so it won't scale past there. GTK2 uses smarter font drawing, so that may not be an issue in future versions, so feel free to test. Another smarter way to do it would be to set a global zoom limit at that point. The hit-test is done on the entire text extent. This could be made optional, but I haven't gotten around to it. """ def __init__(self, String, XY, Size, Color = "Black", BackgroundColor = None, Family = wx.FONTFAMILY_MODERN, Style = wx.FONTSTYLE_NORMAL, Weight = wx.FONTWEIGHT_NORMAL, Underlined = False, Position = 'tl', Font = None, InForeground = False): DrawObject.__init__(self,InForeground) self.String = String self.XY = N.array( XY, N.float) self.XY.shape = (2,) self.Size = Size self.Color = Color self.BackgroundColor = BackgroundColor self.Family = Family self.Style = Style self.Weight = Weight self.Underlined = Underlined if not Font: self.FaceName = '' else: self.FaceName = Font.GetFaceName() self.Family = Font.GetFamily() self.Style = Font.GetStyle() self.Underlined = Font.GetUnderlined() self.Weight = Font.GetWeight() # Experimental max font size value on wxGTK2: this works OK on # my system. If it's a lot larger, there is a crash, with the # message: # # The application 'FloatCanvasDemo.py' lost its # connection to the display :0.0; most likely the X server was # shut down or you killed/destroyed the application. # # Windows and OS-X seem to be better behaved in this regard. # They may not draw it, but they don't crash either! self.MaxFontSize = 1000 self.MinFontSize = 1 # this can be changed to set a minimum size self.DisappearWhenSmall = True self.ShiftFun = self.ShiftFunDict[Position] self.CalcBoundingBox() def LayoutText(self): # This will be called when the text is re-set # nothing much to be done here self.CalcBoundingBox() def CalcBoundingBox(self): ## this isn't exact, as fonts don't scale exactly. dc = wx.MemoryDC() bitmap = wx.Bitmap(1, 1) dc.SelectObject(bitmap) #wxMac needs a Bitmap selected for GetTextExtent to work. DrawingSize = 40 # pts This effectively determines the resolution that the BB is computed to. ScaleFactor = float(self.Size) / DrawingSize self.SetFont(DrawingSize, self.Family, self.Style, self.Weight, self.Underlined, self.FaceName) dc.SetFont(self.Font) (w,h) = dc.GetTextExtent(self.String) w = w * ScaleFactor h = h * ScaleFactor x, y = self.ShiftFun(self.XY[0], self.XY[1], w, h, world = 1) self.BoundingBox = BBox.asBBox(((x, y-h ),(x + w, y))) def _Draw(self, dc , WorldToPixel, ScaleWorldToPixel, HTdc=None): (X,Y) = WorldToPixel( (self.XY) ) # compute the font size: Size = abs( ScaleWorldToPixel( (self.Size, self.Size) )[1] ) # only need a y coordinate length ## Check to see if the font size is large enough to blow up the X font server ## If so, limit it. Would it be better just to not draw it? ## note that this limit is dependent on how much memory you have, etc. Size = min(Size, self.MaxFontSize) Size = max(Size, self.MinFontSize) # smallest size you want - default to 0 # Draw the Text if not( self.DisappearWhenSmall and Size <= self.MinFontSize) : # don't try to draw a zero sized font! self.SetFont(Size, self.Family, self.Style, self.Weight, self.Underlined, self.FaceName) dc.SetFont(self.Font) dc.SetTextForeground(self.Color) if self.BackgroundColor: dc.SetBackgroundMode(wx.SOLID) dc.SetTextBackground(self.BackgroundColor) else: dc.SetBackgroundMode(wx.TRANSPARENT) (w,h) = dc.GetTextExtent(self.String) # compute the shift, and adjust the coordinates, if neccesary # This had to be put in here, because it changes with Zoom, as # fonts don't scale exactly. xy = self.ShiftFun(X, Y, w, h) dc.DrawText(self.String, xy) if HTdc and self.HitAble: HTdc.SetPen(self.HitPen) HTdc.SetBrush(self.HitBrush) HTdc.DrawRectangle(xy, (w, h)) class ScaledTextBox(TextObjectMixin, DrawObject): """ Draws a text object The object is scaled when zoomed. The hit-test is done on the entire text extent Bugs/Limitations: As fonts are scaled, they do end up a little different, so you don't get exactly the same picture as you scale up and down, but it's pretty darn close. On wxGTK1 on my Linux system, at least, using a font of over about 1000 pts. brings the system to a halt. It's the Font Server using huge amounts of memory. My work around is to max the font size to 1000 points, so it won't scale past there. GTK2 uses smarter font drawing, so that may not be an issue in future versions, so feel free to test. Another smarter way to do it would be to set a global zoom limit at that point. """ def __init__(self, String, Point, Size, Color = "Black", BackgroundColor = None, LineColor = 'Black', LineStyle = 'Solid', LineWidth = 1, Width = None, PadSize = None, Family = wx.FONTFAMILY_MODERN, Style = wx.FONTSTYLE_NORMAL, Weight = wx.FONTWEIGHT_NORMAL, Underlined = False, Position = 'tl', Alignment = "left", Font = None, LineSpacing = 1.0, InForeground = False): """ Default class constructor. :param `Point`: takes a 2-tuple, or a (2,) `NumPy `_ array of point coordinates :param integer `Size`: size in World units :param `Color`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetColor` :param `BackgroundColor`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetColor` :param `LineColor`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetColor` :param `LineWidth`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetLineWidth` :param `Width`: width in pixels or ``None``, text will be wrapped to the given width. :param `PadSize`: padding in world units or ``None``, if specified it will creating a space (margin) around the text :param FontFamily `Family`: a valid :ref:`FontFamily` :param FontStyle `Style`: a valid :ref:`FontStyle` :param FontWeight `Weight`: a valid :ref:`FontWeight` :param boolean `Underlined`: underline the text :param string `Position`: a two character string indicating where in relation to the coordinates the box should be oriented ============== ========================== 1st character Meaning ============== ========================== ``t`` top ``c`` center ``b`` bottom ============== ========================== ============== ========================== 2nd character Meaning ============== ========================== ``l`` left ``c`` center ``r`` right ============== ========================== :param `Alignment`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetLineWidth` :param Font `Font`: alternatively a valid :class:`Font` can be defined in which case the above will be ignored :param float `LineSpacing`: the line space to be used :param boolean `InForeground`: should object be in foreground """ DrawObject.__init__(self,InForeground) self.XY = N.array(Point, N.float) self.Size = Size self.Color = Color self.BackgroundColor = BackgroundColor self.LineColor = LineColor self.LineStyle = LineStyle self.LineWidth = LineWidth self.Width = Width if PadSize is None: # the default is just a little bit of padding self.PadSize = Size/10.0 else: self.PadSize = float(PadSize) self.Family = Family self.Style = Style self.Weight = Weight self.Underlined = Underlined self.Alignment = Alignment.lower() self.LineSpacing = float(LineSpacing) self.Position = Position if not Font: self.FaceName = '' else: self.FaceName = Font.GetFaceName() self.Family = Font.GetFamily() self.Style = Font.GetStyle() self.Underlined = Font.GetUnderlined() self.Weight = Font.GetWeight() # Experimental max font size value on wxGTK2: this works OK on # my system. If it's a lot larger, there is a crash, with the # message: # # The application 'FloatCanvasDemo.py' lost its # connection to the display :0.0; most likely the X server was # shut down or you killed/destroyed the application. # # Windows and OS-X seem to be better behaved in this regard. # They may not draw it, but they don't crash either! self.MaxFontSize = 1000 self.MinFontSize = 1 # this can be changed to set a larger minimum size self.DisappearWhenSmall = True self.ShiftFun = self.ShiftFunDict[Position] self.String = String self.LayoutText() self.CalcBoundingBox() self.SetPen(LineColor,LineStyle,LineWidth) self.SetBrush(BackgroundColor, "Solid") def WrapToWidth(self): dc = wx.MemoryDC() bitmap = wx.Bitmap(1, 1) dc.SelectObject(bitmap) #wxMac needs a Bitmap selected for GetTextExtent to work. DrawingSize = self.LayoutFontSize # pts This effectively determines the resolution that the BB is computed to. ScaleFactor = float(self.Size) / DrawingSize Width = (self.Width - 2*self.PadSize) / ScaleFactor #Width to wrap to self.SetFont(DrawingSize, self.Family, self.Style, self.Weight, self.Underlined, self.FaceName) dc.SetFont(self.Font) NewStrings = [] for s in self.Strings: #beginning = True text = s.split(" ") text.reverse() LineLength = 0 NewText = text[-1] del text[-1] while text: w = dc.GetTextExtent(' ' + text[-1])[0] if LineLength + w <= Width: NewText += ' ' NewText += text[-1] LineLength = dc.GetTextExtent(NewText)[0] else: NewStrings.append(NewText) NewText = text[-1] LineLength = dc.GetTextExtent(text[-1])[0] del text[-1] NewStrings.append(NewText) self.Strings = NewStrings def ReWrap(self, Width): self.Width = Width self.LayoutText() def LayoutText(self): """ Calculates the positions of the words of text. This isn't exact, as fonts don't scale exactly. To help this, the position of each individual word is stored separately, so that the general layout stays the same in world coordinates, as the fonts scale. """ self.Strings = self.String.split("\n") if self.Width: self.WrapToWidth() dc = wx.MemoryDC() bitmap = wx.Bitmap(1, 1) dc.SelectObject(bitmap) #wxMac needs a Bitmap selected for GetTextExtent to work. DrawingSize = self.LayoutFontSize # pts This effectively determines the resolution that the BB is computed to. ScaleFactor = float(self.Size) / DrawingSize self.SetFont(DrawingSize, self.Family, self.Style, self.Weight, self.Underlined, self.FaceName) dc.SetFont(self.Font) TextHeight = dc.GetTextExtent("X")[1] SpaceWidth = dc.GetTextExtent(" ")[0] LineHeight = TextHeight * self.LineSpacing LineWidths = N.zeros((len(self.Strings),), N.float) y = 0 Words = [] AllLinePoints = [] for i, s in enumerate(self.Strings): LineWidths[i] = 0 LineWords = s.split(" ") LinePoints = N.zeros((len(LineWords),2), N.float) for j, word in enumerate(LineWords): if j > 0: LineWidths[i] += SpaceWidth Words.append(word) LinePoints[j] = (LineWidths[i], y) w = dc.GetTextExtent(word)[0] LineWidths[i] += w y -= LineHeight AllLinePoints.append(LinePoints) TextWidth = N.maximum.reduce(LineWidths) self.Words = Words if self.Width is None: BoxWidth = TextWidth * ScaleFactor + 2*self.PadSize else: # use the defined Width BoxWidth = self.Width Points = N.zeros((0,2), N.float) for i, LinePoints in enumerate(AllLinePoints): ## Scale to World Coords. LinePoints *= (ScaleFactor, ScaleFactor) if self.Alignment == 'left': LinePoints[:,0] += self.PadSize elif self.Alignment == 'center': LinePoints[:,0] += (BoxWidth - LineWidths[i]*ScaleFactor)/2.0 elif self.Alignment == 'right': LinePoints[:,0] += (BoxWidth - LineWidths[i]*ScaleFactor-self.PadSize) Points = N.concatenate((Points, LinePoints)) BoxHeight = -(Points[-1,1] - (TextHeight * ScaleFactor)) + 2*self.PadSize #(x,y) = self.ShiftFun(self.XY[0], self.XY[1], BoxWidth, BoxHeight, world=1) Points += (0, -self.PadSize) self.Points = Points self.BoxWidth = BoxWidth self.BoxHeight = BoxHeight self.CalcBoundingBox() def CalcBoundingBox(self): """Calculates the Bounding Box""" w, h = self.BoxWidth, self.BoxHeight x, y = self.ShiftFun(self.XY[0], self.XY[1], w, h, world=1) self.BoundingBox = BBox.asBBox(((x, y-h ),(x + w, y))) def GetBoxRect(self): wh = (self.BoxWidth, self.BoxHeight) xy = (self.BoundingBox[0,0], self.BoundingBox[1,1]) return (xy, wh) def _Draw(self, dc , WorldToPixel, ScaleWorldToPixel, HTdc=None): xy, wh = self.GetBoxRect() Points = self.Points + xy Points = WorldToPixel(Points) xy = WorldToPixel(xy) wh = ScaleWorldToPixel(wh) * (1,-1) # compute the font size: Size = abs( ScaleWorldToPixel( (self.Size, self.Size) )[1] ) # only need a y coordinate length ## Check to see if the font size is large enough to blow up the X font server ## If so, limit it. Would it be better just to not draw it? ## note that this limit is dependent on how much memory you have, etc. Size = min(Size, self.MaxFontSize) Size = max(Size, self.MinFontSize) # smallest size you want - default to 1 # Draw The Box if (self.LineStyle and self.LineColor) or self.BackgroundColor: dc.SetBrush(self.Brush) dc.SetPen(self.Pen) dc.DrawRectangle(xy , wh) # Draw the Text if not( self.DisappearWhenSmall and Size <= self.MinFontSize) : # don't try to draw a zero sized font! self.SetFont(Size, self.Family, self.Style, self.Weight, self.Underlined, self.FaceName) dc.SetFont(self.Font) dc.SetTextForeground(self.Color) dc.SetBackgroundMode(wx.TRANSPARENT) dc.DrawTextList(self.Words, Points) # Draw the hit box. if HTdc and self.HitAble: HTdc.SetPen(self.HitPen) HTdc.SetBrush(self.HitBrush) HTdc.DrawRectangle(xy, wh) class Bitmap(TextObjectMixin, DrawObject): """ Draws a bitmap The size is fixed, and does not scale with the drawing. """ def __init__(self, Bitmap, XY, Position='tl', InForeground=False): """ Default class constructor. :param Bitmap `Bitmap`: the bitmap to be drawn :param `XY`: the (x, y) coordinate of the corner of the bitmap, or a 2-tuple, or a (2,) `NumPy `_ array :param string `Position`: a two character string indicating where in relation to the coordinates the bitmap should be oriented ============== ========================== 1st character Meaning ============== ========================== ``t`` top ``c`` center ``b`` bottom ============== ========================== ============== ========================== 2nd character Meaning ============== ========================== ``l`` left ``c`` center ``r`` right ============== ========================== :param boolean `InForeground`: should object be in foreground """ DrawObject.__init__(self,InForeground) if type(Bitmap) == wx.Bitmap: self.Bitmap = Bitmap elif type(Bitmap) == wx.Image: self.Bitmap = wx.Bitmap(Bitmap) # Note the BB is just the point, as the size in World coordinates is not fixed self.BoundingBox = BBox.asBBox( (XY,XY) ) self.XY = XY (self.Width, self.Height) = self.Bitmap.GetWidth(), self.Bitmap.GetHeight() self.ShiftFun = self.ShiftFunDict[Position] def _Draw(self, dc , WorldToPixel, ScaleWorldToPixel, HTdc=None): XY = WorldToPixel(self.XY) XY = self.ShiftFun(XY[0], XY[1], self.Width, self.Height) dc.DrawBitmap(self.Bitmap, XY, True) if HTdc and self.HitAble: HTdc.SetPen(self.HitPen) HTdc.SetBrush(self.HitBrush) HTdc.DrawRectangle(XY, (self.Width, self.Height) ) class ScaledBitmap(TextObjectMixin, DrawObject): """ Draws a scaled bitmap The size scales with the drawing """ def __init__(self, Bitmap, XY, Height, Position = 'tl', InForeground = False): """ Default class constructor. :param wx.Bitmap `Bitmap`: the bitmap to be drawn :param `XY`: the (x, y) coordinate of the corner of the scaled bitmap, or a 2-tuple, or a (2,) `NumPy `_ array :param `Height`: height to be used, width is calculated from the aspect ratio of the bitmap :param string `Position`: a two character string indicating where in relation to the coordinates the bitmap should be oriented ============== ========================== 1st character Meaning ============== ========================== ``t`` top ``c`` center ``b`` bottom ============== ========================== ============== ========================== 2nd character Meaning ============== ========================== ``l`` left ``c`` center ``r`` right ============== ========================== :param boolean `InForeground`: should object be in foreground """ DrawObject.__init__(self,InForeground) if type(Bitmap) == wx.Bitmap: self.Image = Bitmap.ConvertToImage() elif type(Bitmap) == wx.Image: self.Image = Bitmap self.XY = XY self.Height = Height (self.bmpWidth, self.bmpHeight) = self.Image.GetWidth(), self.Image.GetHeight() self.Width = self.bmpWidth / self.bmpHeight * Height self.ShiftFun = self.ShiftFunDict[Position] self.CalcBoundingBox() self.ScaledBitmap = None self.ScaledHeight = None def CalcBoundingBox(self): """Calculate the bounding box.""" ## this isn't exact, as fonts don't scale exactly. w, h = self.Width, self.Height x, y = self.ShiftFun(self.XY[0], self.XY[1], w, h, world = 1) self.BoundingBox = BBox.asBBox( ( (x, y-h ), (x + w, y) ) ) def _Draw(self, dc , WorldToPixel, ScaleWorldToPixel, HTdc=None): XY = WorldToPixel(self.XY) H = ScaleWorldToPixel(self.Height)[0] W = H * (self.bmpWidth / self.bmpHeight) if (self.ScaledBitmap is None) or (H != self.ScaledHeight) : self.ScaledHeight = H Img = self.Image.Scale(W, H) self.ScaledBitmap = wx.Bitmap(Img) XY = self.ShiftFun(XY[0], XY[1], W, H) dc.DrawBitmap(self.ScaledBitmap, XY, True) if HTdc and self.HitAble: HTdc.SetPen(self.HitPen) HTdc.SetBrush(self.HitBrush) HTdc.DrawRectangle(XY, (W, H) ) class ScaledBitmap2(TextObjectMixin, DrawObject, ): """ Draws a scaled bitmap An alternative scaled bitmap that only scaled the required amount of the main bitmap when zoomed in: EXPERIMENTAL! """ def __init__(self, Bitmap, XY, Height, Width=None, Position = 'tl', InForeground = False): """ Default class constructor. :param wx.Bitmap `Bitmap`: the bitmap to be drawn :param `XY`: the (x, y) coordinate of the corner of the scaled bitmap, or a 2-tuple, or a (2,) `NumPy `_ array :param `Height`: height to be used :param `Width`: width to be used, if ``None`` width is calculated from the aspect ratio of the bitmap :param string `Position`: a two character string indicating where in relation to the coordinates the bitmap should be oriented ============== ========================== 1st character Meaning ============== ========================== ``t`` top ``c`` center ``b`` bottom ============== ========================== ============== ========================== 2nd character Meaning ============== ========================== ``l`` left ``c`` center ``r`` right ============== ========================== :param boolean `InForeground`: should object be in foreground """ DrawObject.__init__(self,InForeground) if type(Bitmap) == wx.Bitmap: self.Image = Bitmap.ConvertToImage() elif type(Bitmap) == wx.Image: self.Image = Bitmap self.XY = N.array(XY, N.float) self.Height = Height (self.bmpWidth, self.bmpHeight) = self.Image.GetWidth(), self.Image.GetHeight() self.bmpWH = N.array((self.bmpWidth, self.bmpHeight), N.int32) ## fixme: this should all accommodate different scales for X and Y if Width is None: self.BmpScale = float(self.bmpHeight) / Height self.Width = self.bmpWidth / self.BmpScale self.WH = N.array((self.Width, Height), N.float) ##fixme: should this have a y = -1 to shift to y-up? self.BmpScale = self.bmpWH / self.WH #print("bmpWH:", self.bmpWH) #print("Width, Height:", self.WH) #print("self.BmpScale", self.BmpScale) self.ShiftFun = self.ShiftFunDict[Position] self.CalcBoundingBox() self.ScaledBitmap = None # cache of the last existing scaled bitmap def CalcBoundingBox(self): """Calculate the bounding box.""" ## this isn't exact, as fonts don't scale exactly. w,h = self.Width, self.Height x, y = self.ShiftFun(self.XY[0], self.XY[1], w, h, world = 1) self.BoundingBox = BBox.asBBox( ((x, y-h ), (x + w, y)) ) def WorldToBitmap(self, Pw): """Computes the bitmap coords from World coords.""" delta = Pw - self.XY Pb = delta * self.BmpScale Pb *= (1, -1) ##fixme: this may only works for Yup projection! ## and may only work for top left position return Pb.astype(N.int_) def _DrawEntireBitmap(self, dc , WorldToPixel, ScaleWorldToPixel, HTdc): """ this is pretty much the old code Scales and Draws the entire bitmap. """ XY = WorldToPixel(self.XY) H = ScaleWorldToPixel(self.Height)[0] W = H * (self.bmpWidth / self.bmpHeight) if (self.ScaledBitmap is None) or (self.ScaledBitmap[0] != (0, 0, self.bmpWidth, self.bmpHeight, W, H) ): #if True: #fixme: (self.ScaledBitmap is None) or (H != self.ScaledHeight) : self.ScaledHeight = H #print("Scaling to:", W, H) Img = self.Image.Scale(W, H) bmp = wx.Bitmap(Img) self.ScaledBitmap = ((0, 0, self.bmpWidth, self.bmpHeight , W, H), bmp)# this defines the cached bitmap else: #print("Using Cached bitmap") bmp = self.ScaledBitmap[1] XY = self.ShiftFun(XY[0], XY[1], W, H) dc.DrawBitmap(bmp, XY, True) if HTdc and self.HitAble: HTdc.SetPen(self.HitPen) HTdc.SetBrush(self.HitBrush) HTdc.DrawRectangle(XY, (W, H) ) def _DrawSubBitmap(self, dc , WorldToPixel, ScaleWorldToPixel, HTdc): """ Subsets just the part of the bitmap that is visible then scales and draws that. """ BBworld = BBox.asBBox(self._Canvas.ViewPortBB) BBbitmap = BBox.fromPoints(self.WorldToBitmap(BBworld)) XYs = WorldToPixel(self.XY) # figure out subimage: # fixme: this should be able to be done more succinctly! if BBbitmap[0,0] < 0: Xb = 0 elif BBbitmap[0,0] > self.bmpWH[0]: # off the bitmap Xb = 0 else: Xb = BBbitmap[0,0] XYs[0] = 0 # draw at origin if BBbitmap[0,1] < 0: Yb = 0 elif BBbitmap[0,1] > self.bmpWH[1]: # off the bitmap Yb = 0 ShouldDraw = False else: Yb = BBbitmap[0,1] XYs[1] = 0 # draw at origin if BBbitmap[1,0] < 0: #off the screen -- This should never happen! Wb = 0 elif BBbitmap[1,0] > self.bmpWH[0]: Wb = self.bmpWH[0] - Xb else: Wb = BBbitmap[1,0] - Xb if BBbitmap[1,1] < 0: # off the screen -- This should never happen! Hb = 0 ShouldDraw = False elif BBbitmap[1,1] > self.bmpWH[1]: Hb = self.bmpWH[1] - Yb else: Hb = BBbitmap[1,1] - Yb FullHeight = ScaleWorldToPixel(self.Height)[0] scale = FullHeight / self.bmpWH[1] Ws = int(scale * Wb + 0.5) # add the 0.5 to round Hs = int(scale * Hb + 0.5) if (self.ScaledBitmap is None) or (self.ScaledBitmap[0] != (Xb, Yb, Wb, Hb, Ws, Ws) ): Img = self.Image.GetSubImage(wx.Rect(Xb, Yb, Wb, Hb)) #print("rescaling with High quality") Img.Rescale(Ws, Hs, quality=wx.IMAGE_QUALITY_HIGH) bmp = wx.Bitmap(Img) self.ScaledBitmap = ((Xb, Yb, Wb, Hb, Ws, Ws), bmp)# this defines the cached bitmap #XY = self.ShiftFun(XY[0], XY[1], W, H) #fixme: get the shiftfun working! else: #print("Using cached bitmap") ##fixme: The cached bitmap could be used if the one needed is the same scale, but ## a subset of the cached one. bmp = self.ScaledBitmap[1] dc.DrawBitmap(bmp, XYs, True) if HTdc and self.HitAble: HTdc.SetPen(self.HitPen) HTdc.SetBrush(self.HitBrush) HTdc.DrawRectangle(XYs, (Ws, Hs) ) def _Draw(self, dc , WorldToPixel, ScaleWorldToPixel, HTdc=None): BBworld = BBox.asBBox(self._Canvas.ViewPortBB) ## first see if entire bitmap is displayed: if BBworld.Inside(self.BoundingBox): #print("Drawing entire bitmap with old code") self._DrawEntireBitmap(dc , WorldToPixel, ScaleWorldToPixel, HTdc) return None elif BBworld.Overlaps(self.BoundingBox): #BBbitmap = BBox.fromPoints(self.WorldToBitmap(BBworld)) #print("Drawing a sub-bitmap") self._DrawSubBitmap(dc , WorldToPixel, ScaleWorldToPixel, HTdc) else: #print("Not Drawing -- no part of image is showing") pass class DotGrid: """ An example of a Grid Object -- it is set on the FloatCanvas with one of:: FloatCanvas.GridUnder = Grid FloatCanvas.GridOver = Grid It will be drawn every time, regardless of the viewport. In its _Draw method, it computes what to draw, given the ViewPortBB of the Canvas it's being drawn on. """ def __init__(self, Spacing, Size = 2, Color = "Black", Cross=False, CrossThickness = 1): self.Spacing = N.array(Spacing, N.float) self.Spacing.shape = (2,) self.Size = Size self.Color = Color self.Cross = Cross self.CrossThickness = CrossThickness def CalcPoints(self, Canvas): ViewPortBB = Canvas.ViewPortBB Spacing = self.Spacing minx, miny = N.floor(ViewPortBB[0] / Spacing) * Spacing maxx, maxy = N.ceil(ViewPortBB[1] / Spacing) * Spacing ##fixme: this could use vstack or something with numpy x = N.arange(minx, maxx+Spacing[0], Spacing[0]) # making sure to get the last point y = N.arange(miny, maxy+Spacing[1], Spacing[1]) # an extra is OK Points = N.zeros((len(y), len(x), 2), N.float) x.shape = (1,-1) y.shape = (-1,1) Points[:,:,0] += x Points[:,:,1] += y Points.shape = (-1,2) return Points def _Draw(self, dc, Canvas): Points = self.CalcPoints(Canvas) Points = Canvas.WorldToPixel(Points) dc.SetPen(wx.Pen(self.Color,self.CrossThickness)) if self.Cross: # Use cross shaped markers #Horizontal lines LinePoints = N.concatenate((Points + (self.Size,0),Points + (-self.Size,0)),1) dc.DrawLineList(LinePoints) # Vertical Lines LinePoints = N.concatenate((Points + (0,self.Size),Points + (0,-self.Size)),1) dc.DrawLineList(LinePoints) pass else: # use dots ## Note: this code borrowed from Pointset -- it really shouldn't be repeated here!. if self.Size <= 1: dc.DrawPointList(Points) elif self.Size <= 2: dc.DrawPointList(Points + (0,-1)) dc.DrawPointList(Points + (0, 1)) dc.DrawPointList(Points + (1, 0)) dc.DrawPointList(Points + (-1,0)) else: dc.SetBrush(wx.Brush(self.Color)) radius = int(round(self.Size/2)) ##fixme: I really should add a DrawCircleList to wxPython if len(Points) > 100: xy = Points xywh = N.concatenate((xy-radius, N.ones(xy.shape) * self.Size ), 1 ) dc.DrawEllipseList(xywh) else: for xy in Points: dc.DrawCircle(xy[0],xy[1], radius) class Arc(XYObjectMixin, LineAndFillMixin, DrawObject): """ Draws an arc of a circle, centered on point ``CenterXY``, from the first point ``StartXY`` to the second ``EndXY``. The arc is drawn in an anticlockwise direction from the start point to the end point. """ def __init__(self, StartXY, EndXY, CenterXY, LineColor = "Black", LineStyle = "Solid", LineWidth = 1, FillColor = None, FillStyle = "Solid", InForeground = False): """ Default class constructor. :param `StartXY`: start point, takes a 2-tuple, or a (2,) `NumPy `_ array of point coordinates :param `EndXY`: end point, takes a 2-tuple, or a (2,) `NumPy `_ array of point coordinates :param `CenterXY`: center point, takes a 2-tuple, or a (2,) `NumPy `_ array of point coordinates :param `LineColor`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetColor` :param `LineStyle`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetLineStyle` :param `LineWidth`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetLineWidth` :param `FillColor`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetColor` :param `FillStyle`: see :meth:`~lib.floatcanvas.FloatCanvas.DrawObject.SetFillStyle` :param boolean `InForeground`: should object be in foreground """ DrawObject.__init__(self, InForeground) # There is probably a more elegant way to do this next section # The bounding box just gets set to the WH of a circle, with center at CenterXY # This is suitable for a pie chart as it will be a circle anyway radius = N.sqrt( (StartXY[0]-CenterXY[0])**2 + (StartXY[1]-CenterXY[1])**2 ) minX = CenterXY[0]-radius minY = CenterXY[1]-radius maxX = CenterXY[0]+radius maxY = CenterXY[1]+radius XY = [minX,minY] WH = [maxX-minX,maxY-minY] self.XY = N.asarray( XY, N.float).reshape((2,)) self.WH = N.asarray( WH, N.float).reshape((2,)) self.StartXY = N.asarray(StartXY, N.float).reshape((2,)) self.CenterXY = N.asarray(CenterXY, N.float).reshape((2,)) self.EndXY = N.asarray(EndXY, N.float).reshape((2,)) #self.BoundingBox = array((self.XY, (self.XY + self.WH)), Float) self.CalcBoundingBox() #Finish the setup; allocate color,style etc. self.LineColor = LineColor self.LineStyle = LineStyle self.LineWidth = LineWidth self.FillColor = FillColor self.FillStyle = FillStyle self.HitLineWidth = max(LineWidth,self.MinHitLineWidth) self.SetPen(LineColor, LineStyle, LineWidth) self.SetBrush(FillColor, FillStyle) #Why isn't this working ??? def Move(self, Delta): """ Move the object by delta :param `Delta`: delta is a (dx, dy) pair. Ideally a `NumPy `_ array of shape (2,) """ Delta = N.asarray(Delta, N.float) self.XY += Delta self.StartXY += Delta self.CenterXY += Delta self.EndXY += Delta self.BoundingBox += Delta if self._Canvas: self._Canvas.BoundingBoxDirty = True def _Draw(self, dc , WorldToPixel, ScaleWorldToPixel, HTdc=None): self.SetUpDraw(dc , WorldToPixel, ScaleWorldToPixel, HTdc) StartXY = WorldToPixel(self.StartXY) EndXY = WorldToPixel(self.EndXY) CenterXY = WorldToPixel(self.CenterXY) dc.DrawArc(StartXY, EndXY, CenterXY) if HTdc and self.HitAble: HTdc.DrawArc(StartXY, EndXY, CenterXY) def CalcBoundingBox(self): """Calculate the bounding box.""" self.BoundingBox = BBox.asBBox( N.array((self.XY, (self.XY + self.WH) ), N.float) ) if self._Canvas: self._Canvas.BoundingBoxDirty = True class PieChart(XYObjectMixin, LineOnlyMixin, DrawObject): """ This is DrawObject for a pie chart You can pass in a bunch of values, and it will draw a pie chart for you, and it will make the chart, scaling the size of each "slice" to match your values. """ ##fixme: this should be a longer and better designed set. ## Maybe one from: http://geography.uoregon.edu/datagraphics/color_scales.htm DefaultColorList = Colors.CategoricalColor1 #["Red", "Green", "Blue", "Purple", "Yellow", "Cyan"] def __init__(self, XY, Diameter, Values, FillColors=None, FillStyles=None, LineColor = None, LineStyle = "Solid", LineWidth = 1, Scaled = True, InForeground = False): """ Default class constructor. :param `XY`: The (x,y) coords of the center of the chart :param `Diameter`: The diamter of the chart in worls coords, unless you set "Scaled" to False, in which case it's in pixel coords. :param `Values`: sequence of values you want to make the chart of. :param `FillColors`: sequence of colors you want the slices. If None, it will choose (no guarantee you'll like them!) :param `FillStyles`: Fill style you want ("Solid", "Hash", etc) :param `LineColor`: Color of lines separating the slices :param `LineStyle`: style of lines separating the slices :param `LineWidth`: With of lines separating the slices :param `Scaled`: Do you want the pie to scale when zooming? or stay the same size in pixels? :param `InForeground`: Should it be on the foreground? """ DrawObject.__init__(self, InForeground) self.XY = N.asarray(XY, N.float).reshape( (2,) ) self.Diameter = Diameter self.Values = N.asarray(Values, dtype=N.float).reshape((-1,1)) if FillColors is None: FillColors = self.DefaultColorList[:len(Values)] if FillStyles is None: FillStyles = ['Solid'] * len(FillColors) self.FillColors = FillColors self.FillStyles = FillStyles self.LineColor = LineColor self.LineStyle = LineStyle self.Scaled = Scaled self.InForeground = InForeground self.SetPen(LineColor, LineStyle, LineWidth) self.SetBrushes() self.CalculatePoints() def SetFillColors(self, FillColors): """ Set the FillColors and update the Brushes. :param `FillColors`: sequence of colors """ self.FillColors = FillColors self.SetBrushes() def SetFillStyles(self, FillStyles): """ Set te FillStyles and update the Brushes. :param `FillStyles`: Fill style you want ("Solid", "Hash", etc) """ self.FillStyles = FillStyles self.SetBrushed() def SetValues(self, Values): """ Set the values and calculate the points. :param `Values`: sequence of values you want to use for the chart """ Values = N.asarray(Values, dtype=N.float).reshape((-1,1)) self.Values = Values self.CalculatePoints() def CalculatePoints(self): """Calculate the points.""" # add the zero point to start Values = N.vstack( ( (0,), self.Values) ) self.Angles = 360. * Values.cumsum()/Values.sum() self.CalcBoundingBox() def SetBrushes(self): """Set the Brushes.""" self.Brushes = [] for FillColor, FillStyle in zip(self.FillColors, self.FillStyles): if FillColor is None or FillStyle is None: self.Brush = wx.TRANSPARENT_BRUSH else: self.Brushes.append(self.BrushList.setdefault( (FillColor, FillStyle), wx.Brush( FillColor, self.FillStyleList[FillStyle] ) ) ) def CalcBoundingBox(self): """Calculate the bounding box.""" if self.Scaled: self.BoundingBox = BBox.asBBox( ((self.XY-self.Diameter),(self.XY+self.Diameter)) ) else: self.BoundingBox = BBox.asBBox((self.XY, self.XY)) if self._Canvas: self._Canvas.BoundingBoxDirty = True def _Draw(self, dc , WorldToPixel, ScaleWorldToPixel, HTdc=None): CenterXY = WorldToPixel(self.XY) if self.Scaled: Diameter = ScaleWorldToPixel( (self.Diameter,self.Diameter) )[0] else: Diameter = self.Diameter WH = N.array((Diameter,Diameter), dtype = N.float) Corner = CenterXY - (WH / 2) dc.SetPen(self.Pen) for i, brush in enumerate(self.Brushes): dc.SetBrush( brush ) dc.DrawEllipticArc(Corner[0], Corner[1], WH[0], WH[1], self.Angles[i], self.Angles[i+1]) if HTdc and self.HitAble: if self.Scaled: radius = (ScaleWorldToPixel(self.Diameter)/2)[0]# just the x-coord else: radius = self.Diameter/2 HTdc.SetPen(self.HitPen) HTdc.SetBrush(self.HitBrush) HTdc.DrawCircle(CenterXY, radius)