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Poodletooth-iLand/panda/python/Lib/site-packages/wx/lib/agw/zoombar.py
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2015-05-18 22:11:33 -04:00

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# --------------------------------------------------------------------------------- #
# ZoomBar wxPython IMPLEMENTATION
#
# Andrea Gavana @ 19 Dec 2012, 21.00 GMT
#
#
# For all kind of problems, requests of enhancements and bug reports, please write
# to me at:
#
# andrea.gavana@gmail.com
# andrea.gavana@maerskoil.com
#
# Or, obviously, to the wxPython mailing list!!!
#
# Tags: phoenix-port, documented, unittest, py3-port
#
# End of comments
# --------------------------------------------------------------------------------- #
"""
:class:`ZoomBar` is a class that *appoximatively* mimics the behaviour of the Mac Dock,
inside a :class:`Panel`.
Description
===========
:class:`ZoomBar` is a class that *appoximatively* mimics the behaviour of the Mac Dock,
inside a :class:`Panel`.
Once you hover mouse over the :class:`ZoomBar` correct button will bubble up, grow to
predefined size, so you can easily see the button you are about to click and
have larger area to click. Difference this makes is amazing.
The buttons are able to be zoomed from the bottom up (bottom fixed) as well
as to zoom from a central point. Also the container is able to move the
remaining buttons around the zoomed button.
Usage
=====
Usage example::
import os
import random
import glob
import wx
import wx.lib.agw.zoombar as ZB
class MyFrame(wx.Frame):
def __init__(self, parent):
wx.Frame.__init__(self, parent, -1, "ZoomBar Demo")
panel = wx.Panel(self)
bar = ZB.ZoomBar(panel, -1)
standard = glob.glob(bitmapDir + "/*96.png")
reflections = glob.glob(bitmapDir + "/*96Flip40.png")
separatorImage = bitmapDir + "/separator.gif"
separatorReflection = bitmapDir + "/separatorFlip.png"
count = 0
for std, ref in zip(standard, reflections):
if random.randint(0, 1) == 1 and count > 0:
sep1 = wx.Bitmap(separatorImage, wx.BITMAP_TYPE_GIF)
sep2 = wx.Bitmap(separatorReflection, wx.BITMAP_TYPE_PNG)
bar.AddSeparator(sep1, sep2)
bname = os.path.split(std)[1][0:-6]
bar.AddButton(wx.Bitmap(std, wx.BITMAP_TYPE_PNG), wx.Bitmap(ref, wx.BITMAP_TYPE_PNG), bname)
count += 1
bar.ResetSize()
sizer = wx.BoxSizer(wx.HORIZONTAL)
sizer.Add(bar, 0, wx.ALIGN_CENTER_HORIZONTAL | wx.ALIGN_CENTER_VERTICAL | wx.ALL, 15)
panel.SetSizer(sizer)
# our normal wxApp-derived class, as usual
app = wx.App(0)
frame = MyFrame(None)
app.SetTopWindow(frame)
frame.Show()
app.MainLoop()
Supported Platforms
===================
:class:`ZoomBar` has been tested on the following platforms:
* Windows (Windows XP).
Window Styles
=============
`No particular window styles are available for this class.`
Events Processing
=================
This class processes the following events:
============================== ==================================================
Event Name Description
============================== ==================================================
``EVT_ZOOMBAR`` Process a ``wxEVT_ZOOMBAR`` event, when a :class:`ZoomBar` button is clicked.
============================== ==================================================
License And Version
===================
:class:`ZoomBar` is distributed under the wxPython license.
Latest Revision: Andrea Gavana @ 19 Dec 2012, 21.00 GMT
Version 0.1
"""
import wx
import sys
import wx.lib.six as six
from wx.lib.embeddedimage import PyEmbeddedImage
zoombackgrey = PyEmbeddedImage(
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# ----------------------------------------------------------------------------
# ZoomBar events and binding for handling them
# ----------------------------------------------------------------------------
wxEVT_ZOOMBAR = wx.NewEventType()
EVT_ZOOMBAR = wx.PyEventBinder(wxEVT_ZOOMBAR, 1)
""" Process a `wxEVT_ZOOMBAR` event, when a :class:`ZoomBar` button is clicked. """
# ----------------------------------------------------------------------------
def MakeDisabledBitmap(original):
"""
Creates a disabled-looking bitmap starting from the input one.
:param `original`: an instance of :class:`Bitmap` to be greyed-out.
"""
img = original.ConvertToImage()
return wx.Bitmap(img.ConvertToGreyscale())
# ----------------------------------------------------------------------------
class ZoomBarImage(object):
"""
This simple class holds information about a :class:`ZoomBar` button, such as normal
bitmaps, disabled bitmap, button label, etc...
"""
def __init__(self, parent, bitmap, disabledBmp=wx.NullBitmap, label=""):
"""
Default class constructor.
:param `parent`: the main :class:`ZoomBar` window;
:param `bitmap`: the button bitmap, an instance of :class:`Bitmap`;
:param `disabledBmp`: the button bitmap when the button is in a disabled
state;
:param `label`: the button label.
"""
self._parent = parent
self._bitmap = bitmap
if not disabledBmp.IsOk():
disabledBmp = MakeDisabledBitmap(bitmap)
self._disabledBmp = disabledBmp
self._label = label
self._height = 36
self._width = 36
self._oldnx = 0
self._oldLeft = 0
self._oldTop = 0
self._oldWidth = 0
self._oldBottom = 0
self._oldHeight = 0
self._vCenter = 0
self._hCenter = 0
self._oldInc = -six.MAXSIZE
self._isSeparator = False
self._enabled = True
# Larger number gives a greater zoom effect
self._zoomFactor = 3
# Whether this is a reflection or not
self._isAReflection = False
self._cachedBitmaps = {}
self._cachedDisabledBitmaps = {}
def SetZoomFactor(self, zoom):
"""
Sets the zoom factor for the button. Larger number gives a greater zoom
effect.
:param `zoom`: a floating point number, greater than or equal to 1.0.
"""
self._zoomFactor = zoom
def SetCenterZoom(self, center=True):
"""
Sets to zoom from the center.
:param `center`: if ``True`` button zooms upwards.
"""
self._centerZoom = center
def ZoomImage(self, nxcoord):
"""
Zooms the button bitmap depending on the mouse x position.
:param `nxcoord`: the mouse x position relative to the button center.
"""
if nxcoord < self._vCenter:
inc = int(((nxcoord - self._oldLeft)*10.0)/(self._oldWidth/2.0)) + 1
else:
inc = int(((self._oldLeft + self._oldWidth - nxcoord)*10.0)/(self._oldWidth/2)) + 1
if self._isSeparator:
return False
if abs(inc - self._oldInc) < 2:
return False
self._oldInc = inc
if not self._isAReflection:
# original button
inc = inc*self._zoomFactor
self._width = self._oldWidth + inc
self._left = self._vCenter - self._width/2
self._height = self._oldHeight + inc
self._top = self._oldBottom - self._height
else:
# the reflection
self._height = self._oldHeight + inc
self._width = self._oldWidth + inc
self._top = self._top + self._height
self._oldnx = nxcoord
return True
def SetSize(self, width, height):
"""
Sets the button size.
:param `width`: the button width;
:param `height`: the button height.
"""
self._width = width
self._height = height
def GetPosition(self):
""" Returns the button position. """
return wx.Point(self._left, self._top)
def GetSize(self):
""" Returns the button size. """
return wx.Size(self._width, self._height)
def GetBitmap(self):
"""
Returns the button bitmap, which may be a scaled up version of the original
bitmap is the button is being zoomed.
"""
if self._isAReflection:
return self._paintBitmap
if self._enabled:
return self._cachedBitmaps[self._width]
return self._cachedDisabledBitmaps[self._width]
def SetupProps(self, buttonSize):
"""
Set up the button position and size.
:param `buttonSize`: the button original size (not zoomed), in pixels.
"""
self._width = self._oldWidth = buttonSize
self._height = self._oldHeight = buttonSize
self._oldLeft = self._left
self._oldTop = self._top
self._vCenter = self._oldLeft + int(self._oldWidth/2.0)
self._hCenter = self._oldTop + int(self._oldHeight/2.0)
self._oldBottom = self._top + self._height
if self._isAReflection:
img = self._bitmap.ConvertToImage()
img = img.Scale(self._width, self._height, wx.IMAGE_QUALITY_HIGH)
self._paintBitmap = img.ConvertToBitmap()
def GetLabel(self):
""" Returns the button label (if any). """
return self._label
def SetLabel(self, label):
"""
Sets the button label.
:param `label`: a string specifying the button label. May be an empty string
for no label.
"""
self._label = label
def IsZoomed(self):
""" Returns ``True`` if the button is zoomed, ``False`` otherwise. """
return self._width/float(self._oldWidth) >= 1.25
def LoopScales(self, size):
"""
Caches the bitmaps at various zoom levels to avoid calling every time
`image.Scale` on the button bitmap.
:param `size`: the original button size, in pixels.
"""
if self._isAReflection:
return
for scale in range(size-10*self._zoomFactor, size+15*self._zoomFactor, self._zoomFactor):
if scale in self._cachedBitmaps or scale <= 0:
continue
img = self._bitmap.ConvertToImage()
img = img.Scale(scale, scale, wx.IMAGE_QUALITY_HIGH)
bmp = img.ConvertToBitmap()
self._cachedBitmaps[scale] = bmp
img = self._disabledBmp.ConvertToImage()
img = img.Scale(scale, scale, wx.IMAGE_QUALITY_HIGH)
bmp = img.ConvertToBitmap()
self._cachedDisabledBitmaps[scale] = bmp
def Enable(self, enable=True):
"""
Enables/disables a button.
:param `enable`: ``True`` to enable a button, ``False`` to disable it.
"""
self._enabled = enable
def IsEnabled(self):
""" Returns ``True`` if the button is enabled, ``False`` otherwise. """
return self._enabled
class ImageBar(object):
""" This class holds the background button bar on which the buttons float. """
def __init__(self, bitmap=None):
"""
Default class constructor.
:param `bitmap`: if not ``None``, the bitmap to use as a background button
bar on which the buttons float. It should be an instance of :class:`Image`.
"""
if bitmap and bitmap.IsOk():
self._bitmap = bitmap
self._hasBitmap = bitmap
else:
self._bitmap = zoombackgrey.GetImage()
self._hasBitmap = None
self._left = 23
self._top = 53
self._startColour = wx.Colour(97, 97, 97)
self._endColour = wx.Colour(97, 97, 97)
def GetPosition(self):
""" Returns the position of :class:`ImageBar`, as a :class:`Point`. """
return wx.Point(self._left, self._top)
def GetSize(self):
""" Returns the size of :class:`ImageBar`, as a :class:`Size`. """
return wx.Size(self._bitmap.GetWidth(), self._bitmap.GetHeight())
def GetBitmap(self):
""" Returns the background button bar on which the buttons float. """
if isinstance(self._bitmap, wx.Image):
return wx.Bitmap(self._bitmap)
return self._bitmap
def SetPosition(self, xpos, ypos):
"""
Sets the position of :class:`ImageBar`.
:param `xpos`: the `x` position of the bar;
:param `ypos`: the `y` position of the bar.
"""
self._left = xpos
self._top = ypos
def SetSize(self, xSize, ySize):
"""
Sets the size of :class:`ImageBar`.
:param `xSize`: the width of the bar, in pixels;
:param `ySize`: the height of the bar, in pixels.
"""
self.SetBarColour(self._startColour, xSize, ySize)
def SetBarColour(self, colour, xSize=None, ySize=None):
"""
Sets the background button bar colour.
:param `colour`: an instance of :class:`Colour`;
:param `xSize`: if not ``None``, the new :class:`ImageBar` width;
:param `ySize`: if not ``None``, the new :class:`ImageBar` height.
"""
if not isinstance(colour, wx.Colour):
colour = wx.Colour(colour)
if self._hasBitmap:
bitmap = self._hasBitmap
else:
bitmap = zoombackgrey.GetImage()
if xSize is not None:
self._size = wx.Size(xSize, ySize)
bitmap.Rescale(self._size.width, self._size.height/2)
r1, g1, b1 = self._startColour.Red(), self._startColour.Green(), self._startColour.Blue()
r2, g2, b2 = colour.Red(), colour.Green(), colour.Blue()
fr = (r1 > 0 and [float(r2)/r1] or [0])[0]
fg = (g1 > 0 and [float(g2)/g1] or [0])[0]
fb = (b1 > 0 and [float(b2)/b1] or [0])[0]
bitmap = bitmap.AdjustChannels(fr, fg, fb, 1)
self._bitmap = bitmap.ConvertToBitmap()
self._endColour = colour
def GetBarColour(self):
""" Returns the background button bar colour. """
return self._endColour
class ZoomBarEvent(wx.PyCommandEvent):
""" Event sent from the :class:`ZoomBar` when a button is activated. """
def __init__(self, eventType, eventId=1):
"""
Default class constructor.
:param `eventType`: the event type;
:param `eventId`: the event identifier.
"""
wx.PyCommandEvent.__init__(self, eventType, eventId)
self._eventType = eventType
def SetSelection(self, selection):
"""
Sets the index of the selected button.
:param `selection`: an integer indicating the current selected button.
"""
self._selection = selection
def GetSelection(self):
""" Returns the index of the selected button. """
return self._selection
def GetLabel(self):
""" Returns the text label of the selected button. """
return self._label
def SetLabel(self, label):
"""
Sets the text label of the selected button.
:param `label`: the text label of the selected button.
"""
self._label = label
class ZoomBar(wx.Control):
"""
:class:`ZoomBar` is a class that *appoximatively* mimics the behaviour of the Mac Dock,
inside a :class:`Panel`.
This is the main class implementation.
"""
def __init__(self, parent, id=wx.ID_ANY, pos=wx.DefaultPosition, size=wx.DefaultSize,
name="ZoomBar"):
"""
Default class constructor.
:param `parent`: the :class:`ZoomBar` parent. Must not be ``None``;
:param `id`: window identifier. A value of -1 indicates a default value;
:param `pos`: the control position. A value of (-1, -1) indicates a default position,
chosen by either the windowing system or wxPython, depending on platform;
:param `size`: the control size. A value of (-1, -1) indicates a default size,
chosen by either the windowing system or wxPython, depending on platform;
:param `name`: the window name.
"""
wx.Control.__init__(self, parent, id, pos, size, style=wx.BORDER_THEME)
# Zoom from the center. If True button zooms upwards.
self._centerZoom = False
# Whether you want reflections or not
self._showReflections = True
# Allows us to nudge a reflection closer to original
self._nudgeReflection = 0
# Extension of the reflection. BMP or PNG etc.
# Initial size of the buttons
self._buttonSize = 48
# Show labels on hovering
self._showLabels = True
# used internally
self._noResize = False
self._buttons = []
self._reflectionButtons = []
self._imgBar = ImageBar()
self._previousHit = -1
self._currentHit = -1
wx.CallLater(200, self.OnLeaveWindow, None)
self.Bind(wx.EVT_PAINT, self.OnPaint)
self.Bind(wx.EVT_ERASE_BACKGROUND, self.OnEraseBackground)
self.Bind(wx.EVT_SIZE, self.OnSize)
self.Bind(wx.EVT_MOTION, self.OnMotion)
self.Bind(wx.EVT_LEAVE_WINDOW, self.OnLeaveWindow)
self.Bind(wx.EVT_LEFT_DOWN, self.OnLeftDown)
self.Bind(wx.EVT_LEFT_UP, self.OnLeftUp)
if wx.Platform == "__WXMSW__":
self.Bind(wx.EVT_LEFT_DCLICK, self.OnLeftDown)
self.SetBackgroundStyle(wx.BG_STYLE_CUSTOM)
def DoGetBestSize(self):
"""
Gets the size which best suits the window: for a control, it would be the
minimal size which doesn't truncate the control, for a panel - the same size
as it would have after a call to `Fit()`.
:note: Overridden from :class:`Control`.
"""
xSize = self._buttonSize*len(self._buttons) + len(self._buttons) + self._buttonSize
ySize = self._buttonSize*2
if self._showLabels:
dc = wx.ClientDC(self)
dummy, yextent = dc.GetTextExtent("Ajgt")
ySize += yextent
return wx.Size(xSize+50, ySize+20)
# reposition the buttons
def Reposition(self, toButton):
"""
Repositions all the buttons inside the :class:`ZoomBar`.
:param `toButton`: the button currently hovered by the mouse (and hence zoomed).
"""
nLeft = toButton._left
nRight = toButton._left + toButton._width + 1
nButton = self._buttons.index(toButton)
# do any buttons on the right
for n in range(nButton + 1, len(self._buttons)):
oButton = self._buttons[n]
oButton._left = nRight
if self._showReflections:
oButtonR = self._reflectionButtons[n]
oButtonR._left = nRight
nRight = nRight + oButton._width + 1
# Reset
nLeft = toButton._left
# now to the left
if nButton > 0:
# only for 2nd and more
for n in range(nButton-1, -1, -1):
oButton = self._buttons[n]
oButton._left = nLeft - (oButton._width + 1)
if self._showReflections:
oButtonR = self._reflectionButtons[n]
oButtonR._left = oButton._left
nLeft = oButton._left
# method to add required buttons
def AddButton(self, normalBmp, reflectionBmp=wx.NullBitmap, label="", disabledBmp=wx.NullBitmap,
disabledReflectionBmp=wx.NullBitmap):
"""
Adds a button to :class:`ZoomBar`.
:param `normalBmp`: the button main bitmap, an instance of :class:`Bitmap`;
:param `reflectionBmp`: a bitmap representing a reflection of the main bitmap,
an instance of :class:`Bitmap`;
:param `label`: the button label;
:param `disabledBmp`: the button main bitmap when the button is in a disabled
state, an instance of :class:`Bitmap`;
:param `disabledReflectionBmp`: a bitmap representing a reflection of the main bitmap,
when the button is in a disabled state, an instance of :class:`Bitmap`.
"""
button = ZoomBarImage(self, normalBmp, disabledBmp, label)
button.SetSize(self._buttonSize, self._buttonSize)
button._centerZoom = (self._showReflections and [False] or [self._centerZoom])[0]
self._buttons.append(button)
self.InitialReposition()
if self._showReflections and reflectionBmp.IsOk():
rbutton = ZoomBarImage(self, reflectionBmp, disabledReflectionBmp)
rbutton.SetSize(self._buttonSize, self._buttonSize)
rbutton._centerzoom = False
rbutton._isAReflection = True
self._reflectionButtons.append(rbutton)
return button
def AddSeparator(self, normalBmp, reflectionBmp=wx.NullBitmap):
"""
Adds a separator to :class:`ZoomBar`.
:param `normalBmp`: the separator main bitmap, an instance of :class:`Bitmap`;
:param `reflectionBmp`: a bitmap representing a reflection of the main bitmap,
an instance of :class:`Bitmap`.
"""
button = self.AddButton(normalBmp, reflectionBmp)
button._isSeparator = True
def SetZoomFactor(self, zoom):
"""
Sets the zoom factor for all the buttons. Larger number gives a greater zoom
effect.
:param `zoom`: a floating point number, greater than or equal to 1.0.
"""
if zoom < 1:
raise Exception("The zoom factor must be greater or equal to 1")
for button in self._buttons:
button._zoomFactor = zoom
self._zoomFactor = zoom
self.DoLayout()
def GetZoomFactor(self):
""" Returns the current zoom factor. """
return self._zoomFactor
def SetCenterZoom(self, center=True):
"""
Sets to zoom from the center.
:param `center`: if ``True`` button zooms upwards.
"""
self._centerZoom = center
for button in self._buttons:
button._centerZoom = (self._showReflections and [False] or [self._centerZoom])[0]
self.DoLayout()
def GetCenterZoom(self):
""" Returns ``True`` if buttons zoom upwards. """
return self._centerZoom
def SetShowReflections(self, show):
"""
Sets whether to show reflections or not.
:param `show`: ``True`` to show reflections, ``False`` otherwise.
"""
self._showReflections = show
self.DoLayout()
def GetShowReflections(self):
""" Returns ``True`` if reflections bitmap are currently shown. """
return self._showReflections
def SetShowLabels(self, show):
"""
Sets whether to show button labels or not.
:param `show`: ``True`` to show button labels, ``False`` otherwise.
"""
self._showLabels = show
self.DoLayout()
def GetShowLabels(self):
""" Returns ``True`` if button labels are currently shown. """
return self._showLabels
def SetBarColour(self, colour):
"""
Sets the background button bar colour.
:param `colour`: an instance of :class:`Colour`;
"""
self._imgBar.SetBarColour(colour)
self.Refresh()
def GetBarColour(self):
""" Returns the background button bar colour. """
return self._imgBar.GetBarColour()
def SetButtonSize(self, size):
"""
Sets the original button size.
:param `size`: the new (not-zoomed) button size, in pixels.
"""
self._buttonSize = size
self.DoLayout()
def GetButtonSize(self):
""" Returns the original (not zoomed) button size, in pixels. """
return self._buttonSize
def EnableButton(self, index, enable=True):
"""
Enables/disables the button at position `index`.
:param `index`: the index of the button to enable/disable;
:param `enable`: ``True`` to enable the button, ``False`` to disable it.
"""
if index < 0 or index >= len(self._buttons):
return False
self._buttons[index].Enable(enable)
self.Refresh()
return True
def IsButtonEnabled(self, index):
"""
Returns ``True`` if the button at position `index` is enabled, ``False``
otherwise.
:param `index`: the index of the button to check.
"""
if index < 0 or index >= len(self._buttons):
return False
return self._buttons[index].IsEnabled()
def DoLayout(self):
""" Common method to re-layout :class:`ZoomBar`. """
self.ResetSize()
self.GetContainingSizer().Layout()
self.Refresh()
def ResetSize(self):
"""
Resets all the button sizes and positions, recalculating the optimal :class:`ZoomBar`
size.
"""
xSize = self._buttonSize*len(self._buttons) + len(self._buttons) + self._buttonSize
ySize = self._buttonSize*2
self._imgBar.SetSize(xSize+self._buttonSize, ySize)
for button in self._buttons:
button.LoopScales(self._buttonSize)
if self._showLabels:
dc = wx.ClientDC(self)
dummy, yextent = dc.GetTextExtent("Ajgt")
ySize += yextent
if self._showReflections:
ySize += self._buttonSize/2
if self._centerZoom:
ySize += self._buttonSize
size = wx.Size(xSize+50, ySize)
self.SetInitialSize(size)
self.SnapToBottom(size)
# Sets up the initial buttons and sizes them from the center
def InitialReposition(self):
"""
Sets up the initial buttons and sizes them from the center.
"""
# repositions the button centrally
# odd buttons one is central - even, half by half
if not self._buttons:
return
size = self.GetSize()
oButton = self._buttons[0]
totalWidth = oButton._width*len(self._buttons) + len(self._buttons)
center = size.GetWidth()/2
nbCenter = totalWidth/2
nLeft = center - nbCenter
if self._showReflections:
nTop = self._imgBar._top - (oButton._height/2)
else:
if self._centerZoom:
nTop = size.height/2 - oButton._height/2
else:
nTop = size.height - oButton._height - 5
for oButton in self._buttons:
oButton._left = nLeft
oButton._top = nTop
oButton.SetupProps(self._buttonSize)
nLeft = nLeft + oButton._width+1
# And the reflection if any
if self._showReflections:
nLeft = center - nbCenter
nudge = self._nudgeReflection
for oButton in self._reflectionButtons:
oButton._left = nLeft
oButton._top = (nTop + oButton._height - 2) - nudge
oButton.SetupProps(self._buttonSize)
nLeft = nLeft + oButton._width + 1
def OnLeaveWindow(self, event):
"""
Handles the ``wx.EVT_LEAVE_WINDOW`` event for :class:`ZoomBar`.
:param `event`: a :class:`MouseEvent` event to be processed.
"""
if self.GetScreenRect().Contains(wx.GetMousePosition()):
return
for button in self._buttons:
button.SetSize(self._buttonSize, self._buttonSize)
self.InitialReposition()
self.Refresh()
def OnSize(self, event):
"""
Handles the ``wx.EVT_SIZE`` event for :class:`ZoomBar`.
:param `event`: a :class:`SizeEvent` event to be processed.
"""
self.SnapToBottom(event.GetSize())
self.Refresh()
event.Skip()
def SnapToBottom(self, size):
"""
Snaps the background button bar bitmap and all the buttons to the bottom
of :class:`ZoomBar`.
:param `size`: the current :class:`ZoomBar` size.
"""
backgroundSize = self._imgBar.GetSize()
xPos = (size.width - backgroundSize.width)/2
yPos = (size.height - backgroundSize.height)
self._imgBar.SetPosition(xPos, yPos)
self.InitialReposition()
def OnPaint(self, event):
"""
Handles the ``wx.EVT_PAINT`` event for :class:`ZoomBar`.
:param `event`: a :class:`PaintEvent` event to be processed.
"""
dc = wx.AutoBufferedPaintDC(self)
dc.SetBackground(wx.WHITE_BRUSH)
dc.Clear()
background = self._imgBar.GetBitmap()
pos = self._imgBar.GetPosition()
dc.DrawBitmap(background, pos.x, pos.y, True)
if not self._buttons:
return
self.DrawButtons(dc)
self.DrawReflections(dc)
self.DrawLabels(dc)
def DrawButtons(self, dc):
"""
Draws all the main button bitmaps on the :class:`ZoomBar` client window.
:param `dc`: an instance of :class:`DC`.
"""
for button in self._buttons:
pos = button.GetPosition()
bitmap = button.GetBitmap()
dc.DrawBitmap(bitmap, pos.x, pos.y, True)
def DrawReflections(self, dc):
"""
Draws all the reflection button bitmaps on the :class:`ZoomBar` client window.
:param `dc`: an instance of :class:`DC`.
"""
if self._showReflections:
for button in self._reflectionButtons:
pos = button.GetPosition()
bitmap = button.GetBitmap()
dc.DrawBitmap(bitmap, pos.x, pos.y, True)
def DrawLabels(self, dc):
"""
Draws all the button labels on the :class:`ZoomBar` client window.
:param `dc`: an instance of :class:`DC`.
"""
if not self._showLabels:
return
dc.SetBrush(wx.WHITE_BRUSH)
dc.SetPen(wx.BLACK_PEN)
for button in self._buttons:
if not button.IsZoomed():
continue
label = button.GetLabel()
if not label:
continue
textWidth, textHeight = dc.GetTextExtent(label)
buttonPos = button.GetPosition()
buttonSize = button.GetSize()
xpos = buttonPos.x + (buttonSize.width - textWidth)/2
ypos = buttonPos.y - textHeight - 2
dc.DrawRectangle(xpos-2, ypos-1, textWidth+4, textHeight+2)
dc.DrawText(label, xpos, ypos)
def OnEraseBackground(self, event):
"""
Handles the ``wx.EVT_ERASE_BACKGROUND`` event for :class:`ZoomBar`.
:param `event`: a :class:`EraseEvent` event to be processed.
:note: This method is intentionally empty to avoid flicker.
"""
pass
def OnMotion(self, event):
"""
Handles the ``wx.EVT_MOTION`` event for :class:`ZoomBar`.
:param `event`: a :class:`MouseEvent` event to be processed.
"""
pos = event.GetPosition()
hit = self.HitTest(pos)
if hit >= 0:
button = self._buttons[hit]
if not button.ZoomImage(pos.x):
return
self.Reposition(button)
else:
if self._previousHit < 0:
return
for button in self._buttons:
button.SetSize(self._buttonSize, self._buttonSize)
self.InitialReposition()
self._previousHit = hit
self.Refresh()
def OnLeftDown(self, event):
"""
Handles the ``wx.EVT_LEFT_DOWN`` and ``wx.EVT_LEFT_DCLICK`` events for :class:`ZoomBar`.
:param `event`: a :class:`MouseEvent` event to be processed.
"""
self._currentHit = self.HitTest(event.GetPosition())
def OnLeftUp(self, event):
"""
Handles the ``wx.EVT_LEFT_UP`` event for :class:`ZoomBar`.
:param `event`: a :class:`MouseEvent` event to be processed.
"""
if self.HitTest(event.GetPosition()) != self._currentHit:
return
if not self.IsButtonEnabled(self._currentHit):
return
eventOut = ZoomBarEvent(wxEVT_ZOOMBAR, self.GetId())
eventOut.SetSelection(self._currentHit)
eventOut.SetLabel(self._buttons[self._currentHit].GetLabel())
eventOut.SetEventObject(self)
self.GetEventHandler().ProcessEvent(eventOut)
def HitTest(self, pos):
"""
HitTest method for :class:`ZoomBar`.
:param `pos`: the current mouse position.
:return: an index representing the button on which the mouse is hovering,
or ``wx.NOT_FOUND`` if no button has been hit.
"""
for index, button in enumerate(self._buttons):
buttonPos = button.GetPosition()
if pos.x >= buttonPos.x and pos.x <= buttonPos.x + button._width:
return index
return wx.NOT_FOUND
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