mirror of
https://github.com/Sneed-Group/Poodletooth-iLand
synced 2024-12-29 06:32:40 -06:00
404 lines
12 KiB
Python
Executable file
404 lines
12 KiB
Python
Executable file
#---------------------------------------------------------------------------
|
|
# Name: wx.lib.mixins.rubberband
|
|
# Purpose: A mixin class for doing "RubberBand"-ing on a window.
|
|
#
|
|
# Author: Robb Shecter and members of wxPython-users
|
|
#
|
|
# Created: 11-September-2002
|
|
# Copyright: (c) 2002 by db-X Corporation
|
|
# Licence: wxWindows license
|
|
# Tags: phoenix-port
|
|
#---------------------------------------------------------------------------
|
|
# 12/14/2003 - Jeff Grimmett (grimmtooth@softhome.net)
|
|
#
|
|
# o 2.5 compatability update.
|
|
# o Tested, but there is an anomaly between first use and subsequent uses.
|
|
# First use is odd, subsequent uses seem to be OK. Init error?
|
|
# -- No, the first time it uses an aspect ratio, but after the reset it doesn't.
|
|
#
|
|
|
|
"""
|
|
A mixin class for doing "RubberBand"-ing on a window.
|
|
"""
|
|
|
|
import wx
|
|
|
|
#
|
|
# Some miscellaneous mathematical and geometrical functions
|
|
#
|
|
|
|
def isNegative(aNumber):
|
|
"""
|
|
x < 0: 1
|
|
else: 0
|
|
"""
|
|
return aNumber < 0
|
|
|
|
|
|
def normalizeBox(box):
|
|
"""
|
|
Convert any negative measurements in the current
|
|
box to positive, and adjust the origin.
|
|
"""
|
|
x, y, w, h = box
|
|
if w < 0:
|
|
x += (w+1)
|
|
w *= -1
|
|
if h < 0:
|
|
y += (h+1)
|
|
h *= -1
|
|
return (x, y, w, h)
|
|
|
|
|
|
def boxToExtent(box):
|
|
"""
|
|
Convert a box specification to an extent specification.
|
|
I put this into a seperate function after I realized that
|
|
I had been implementing it wrong in several places.
|
|
"""
|
|
b = normalizeBox(box)
|
|
return (b[0], b[1], b[0]+b[2]-1, b[1]+b[3]-1)
|
|
|
|
|
|
def pointInBox(x, y, box):
|
|
"""
|
|
Return True if the given point is contained in the box.
|
|
"""
|
|
e = boxToExtent(box)
|
|
return x >= e[0] and x <= e[2] and y >= e[1] and y <= e[3]
|
|
|
|
|
|
def pointOnBox(x, y, box, thickness=1):
|
|
"""
|
|
Return True if the point is on the outside edge
|
|
of the box. The thickness defines how thick the
|
|
edge should be. This is necessary for HCI reasons:
|
|
For example, it's normally very difficult for a user
|
|
to manuever the mouse onto a one pixel border.
|
|
"""
|
|
outerBox = box
|
|
innerBox = (box[0]+thickness, box[1]+thickness, box[2]-(thickness*2), box[3]-(thickness*2))
|
|
return pointInBox(x, y, outerBox) and not pointInBox(x, y, innerBox)
|
|
|
|
|
|
def getCursorPosition(x, y, box, thickness=1):
|
|
"""
|
|
Return a position number in the range 0 .. 7 to indicate
|
|
where on the box border the point is. The layout is:
|
|
|
|
0 1 2
|
|
7 3
|
|
6 5 4
|
|
"""
|
|
x0, y0, x1, y1 = boxToExtent(box)
|
|
w, h = box[2], box[3]
|
|
delta = thickness - 1
|
|
p = None
|
|
|
|
if pointInBox(x, y, (x0, y0, thickness, thickness)):
|
|
p = 0
|
|
elif pointInBox(x, y, (x1-delta, y0, thickness, thickness)):
|
|
p = 2
|
|
elif pointInBox(x, y, (x1-delta, y1-delta, thickness, thickness)):
|
|
p = 4
|
|
elif pointInBox(x, y, (x0, y1-delta, thickness, thickness)):
|
|
p = 6
|
|
elif pointInBox(x, y, (x0+thickness, y0, w-(thickness*2), thickness)):
|
|
p = 1
|
|
elif pointInBox(x, y, (x1-delta, y0+thickness, thickness, h-(thickness*2))):
|
|
p = 3
|
|
elif pointInBox(x, y, (x0+thickness, y1-delta, w-(thickness*2), thickness)):
|
|
p = 5
|
|
elif pointInBox(x, y, (x0, y0+thickness, thickness, h-(thickness*2))):
|
|
p = 7
|
|
|
|
return p
|
|
|
|
|
|
|
|
|
|
class RubberBand:
|
|
"""
|
|
A stretchable border which is drawn on top of an
|
|
image to define an area.
|
|
"""
|
|
def __init__(self, drawingSurface, aspectRatio=None):
|
|
self.__THICKNESS = 5
|
|
self.drawingSurface = drawingSurface
|
|
self.aspectRatio = aspectRatio
|
|
self.hasLetUp = 0
|
|
self.currentlyMoving = None
|
|
self.currentBox = None
|
|
self.__enabled = 1
|
|
self.__currentCursor = None
|
|
|
|
drawingSurface.Bind(wx.EVT_MOUSE_EVENTS, self.__handleMouseEvents)
|
|
drawingSurface.Bind(wx.EVT_PAINT, self.__handleOnPaint)
|
|
|
|
def __setEnabled(self, enabled):
|
|
self.__enabled = enabled
|
|
|
|
def __isEnabled(self):
|
|
return self.__enabled
|
|
|
|
def __handleOnPaint(self, event):
|
|
#print('paint')
|
|
event.Skip()
|
|
|
|
def __isMovingCursor(self):
|
|
"""
|
|
Return True if the current cursor is one used to
|
|
mean moving the rubberband.
|
|
"""
|
|
return self.__currentCursor == wx.CURSOR_HAND
|
|
|
|
def __isSizingCursor(self):
|
|
"""
|
|
Return True if the current cursor is one of the ones
|
|
I may use to signify sizing.
|
|
"""
|
|
sizingCursors = [wx.CURSOR_SIZENESW,
|
|
wx.CURSOR_SIZENS,
|
|
wx.CURSOR_SIZENWSE,
|
|
wx.CURSOR_SIZEWE,
|
|
wx.CURSOR_SIZING,
|
|
wx.CURSOR_CROSS]
|
|
try:
|
|
sizingCursors.index(self.__currentCursor)
|
|
return 1
|
|
except ValueError:
|
|
return 0
|
|
|
|
|
|
def __handleMouseEvents(self, event):
|
|
"""
|
|
React according to the new event. This is the main
|
|
entry point into the class. This method contains the
|
|
logic for the class's behavior.
|
|
"""
|
|
if not self.enabled:
|
|
return
|
|
|
|
x, y = event.GetPosition()
|
|
|
|
# First make sure we have started a box.
|
|
if self.currentBox == None and not event.LeftDown():
|
|
# No box started yet. Set cursor to the initial kind.
|
|
self.__setCursor(wx.CURSOR_CROSS)
|
|
return
|
|
|
|
if event.LeftDown():
|
|
if self.currentBox == None:
|
|
# No RB Box, so start a new one.
|
|
self.currentBox = (x, y, 0, 0)
|
|
self.hasLetUp = 0
|
|
elif self.__isSizingCursor():
|
|
# Starting a sizing operation. Change the origin.
|
|
position = getCursorPosition(x, y, self.currentBox, thickness=self.__THICKNESS)
|
|
self.currentBox = self.__denormalizeBox(position, self.currentBox)
|
|
|
|
elif event.Dragging() and event.LeftIsDown():
|
|
# Use the cursor type to determine operation
|
|
if self.__isMovingCursor():
|
|
if self.currentlyMoving or pointInBox(x, y, self.currentBox):
|
|
if not self.currentlyMoving:
|
|
self.currentlyMoving = (x - self.currentBox[0], y - self.currentBox[1])
|
|
self.__moveTo(x - self.currentlyMoving[0], y - self.currentlyMoving[1])
|
|
elif self.__isSizingCursor():
|
|
self.__resizeBox(x, y)
|
|
|
|
elif event.LeftUp():
|
|
self.hasLetUp = 1
|
|
self.currentlyMoving = None
|
|
self.__normalizeBox()
|
|
|
|
elif event.Moving() and not event.Dragging():
|
|
# Simple mouse movement event
|
|
self.__mouseMoved(x,y)
|
|
|
|
def __denormalizeBox(self, position, box):
|
|
x, y, w, h = box
|
|
b = box
|
|
if position == 2 or position == 3:
|
|
b = (x, y + (h-1), w, h * -1)
|
|
elif position == 0 or position == 1 or position == 7:
|
|
b = (x + (w-1), y + (h-1), w * -1, h * -1)
|
|
elif position == 6:
|
|
b = (x + (w-1), y, w * -1, h)
|
|
return b
|
|
|
|
def __resizeBox(self, x, y):
|
|
"""
|
|
Resize and repaint the box based on the given mouse
|
|
coordinates.
|
|
"""
|
|
# Implement the correct behavior for dragging a side
|
|
# of the box: Only change one dimension.
|
|
if not self.aspectRatio:
|
|
if self.__currentCursor == wx.CURSOR_SIZENS:
|
|
x = None
|
|
elif self.__currentCursor == wx.CURSOR_SIZEWE:
|
|
y = None
|
|
|
|
x0,y0,w0,h0 = self.currentBox
|
|
currentExtent = boxToExtent(self.currentBox)
|
|
if x == None:
|
|
if w0 < 1:
|
|
w0 += 1
|
|
else:
|
|
w0 -= 1
|
|
x = x0 + w0
|
|
if y == None:
|
|
if h0 < 1:
|
|
h0 += 1
|
|
else:
|
|
h0 -= 1
|
|
y = y0 + h0
|
|
x1,y1 = x, y
|
|
w, h = abs(x1-x0)+1, abs(y1-y0)+1
|
|
if self.aspectRatio:
|
|
w = max(w, int(h * self.aspectRatio))
|
|
h = int(w / self.aspectRatio)
|
|
w *= [1,-1][isNegative(x1-x0)]
|
|
h *= [1,-1][isNegative(y1-y0)]
|
|
newbox = (x0, y0, w, h)
|
|
self.__drawAndErase(boxToDraw=normalizeBox(newbox), boxToErase=normalizeBox(self.currentBox))
|
|
self.currentBox = (x0, y0, w, h)
|
|
|
|
def __normalizeBox(self):
|
|
"""
|
|
Convert any negative measurements in the current
|
|
box to positive, and adjust the origin.
|
|
"""
|
|
self.currentBox = normalizeBox(self.currentBox)
|
|
|
|
def __mouseMoved(self, x, y):
|
|
"""
|
|
Called when the mouse moved without any buttons pressed
|
|
or dragging being done.
|
|
"""
|
|
# Are we on the bounding box?
|
|
if pointOnBox(x, y, self.currentBox, thickness=self.__THICKNESS):
|
|
position = getCursorPosition(x, y, self.currentBox, thickness=self.__THICKNESS)
|
|
cursor = [
|
|
wx.CURSOR_SIZENWSE,
|
|
wx.CURSOR_SIZENS,
|
|
wx.CURSOR_SIZENESW,
|
|
wx.CURSOR_SIZEWE,
|
|
wx.CURSOR_SIZENWSE,
|
|
wx.CURSOR_SIZENS,
|
|
wx.CURSOR_SIZENESW,
|
|
wx.CURSOR_SIZEWE
|
|
] [position]
|
|
self.__setCursor(cursor)
|
|
elif pointInBox(x, y, self.currentBox):
|
|
self.__setCursor(wx.CURSOR_HAND)
|
|
else:
|
|
self.__setCursor()
|
|
|
|
def __setCursor(self, id=None):
|
|
"""
|
|
Set the mouse cursor to the given id.
|
|
"""
|
|
if self.__currentCursor != id: # Avoid redundant calls
|
|
if id:
|
|
self.drawingSurface.SetCursor(wx.Cursor(id))
|
|
else:
|
|
self.drawingSurface.SetCursor(wx.NullCursor)
|
|
self.__currentCursor = id
|
|
|
|
def __moveCenterTo(self, x, y):
|
|
"""
|
|
Move the rubber band so that its center is at (x,y).
|
|
"""
|
|
x0, y0, w, h = self.currentBox
|
|
x2, y2 = x - (w/2), y - (h/2)
|
|
self.__moveTo(x2, y2)
|
|
|
|
def __moveTo(self, x, y):
|
|
"""
|
|
Move the rubber band so that its origin is at (x,y).
|
|
"""
|
|
newbox = (x, y, self.currentBox[2], self.currentBox[3])
|
|
self.__drawAndErase(boxToDraw=newbox, boxToErase=self.currentBox)
|
|
self.currentBox = newbox
|
|
|
|
def __drawAndErase(self, boxToDraw, boxToErase=None):
|
|
"""
|
|
Draw one box shape and possibly erase another.
|
|
"""
|
|
dc = wx.ClientDC(self.drawingSurface)
|
|
dc.SetPen(wx.Pen(wx.WHITE, 1, wx.PENSTYLE_DOT))
|
|
dc.SetBrush(wx.TRANSPARENT_BRUSH)
|
|
dc.SetLogicalFunction(wx.XOR)
|
|
if boxToErase:
|
|
r = wx.Rect(*boxToErase)
|
|
dc.DrawRectangle(r)
|
|
|
|
r = wx.Rect(*boxToDraw)
|
|
dc.DrawRectangle(r)
|
|
|
|
def __dumpMouseEvent(self, event):
|
|
print('Moving: ',event.Moving())
|
|
print('Dragging: ',event.Dragging())
|
|
print('LeftDown: ',event.LeftDown())
|
|
print('LeftisDown: ',event.LeftIsDown())
|
|
print('LeftUp: ',event.LeftUp())
|
|
print('Position: ',event.GetPosition())
|
|
print('x,y: ',event.GetX(),event.GetY())
|
|
print()
|
|
|
|
|
|
#
|
|
# The public API:
|
|
#
|
|
|
|
def reset(self, aspectRatio=None):
|
|
"""
|
|
Clear the existing rubberband
|
|
"""
|
|
self.currentBox = None
|
|
self.aspectRatio = aspectRatio
|
|
self.drawingSurface.Refresh()
|
|
|
|
def getCurrentExtent(self):
|
|
"""
|
|
Return (x0, y0, x1, y1) or None if
|
|
no drawing has yet been done.
|
|
"""
|
|
if not self.currentBox:
|
|
extent = None
|
|
else:
|
|
extent = boxToExtent(self.currentBox)
|
|
return extent
|
|
|
|
enabled = property(__isEnabled, __setEnabled, None, 'True if I am responding to mouse events')
|
|
|
|
|
|
|
|
if __name__ == '__main__':
|
|
app = wx.App()
|
|
frame = wx.Frame(None, -1, title='RubberBand Test', size=(300,300))
|
|
|
|
# Add a panel that the rubberband will work on.
|
|
panel = wx.Panel(frame, -1)
|
|
panel.SetBackgroundColour(wx.BLUE)
|
|
|
|
# Create the rubberband
|
|
frame.rubberBand = RubberBand(drawingSurface=panel)
|
|
frame.rubberBand.reset(aspectRatio=0.5)
|
|
|
|
# Add a button that creates a new rubberband
|
|
def __newRubberBand(event):
|
|
frame.rubberBand.reset()
|
|
button = wx.Button(frame, 100, 'Reset Rubberband')
|
|
frame.Bind(wx.EVT_BUTTON, __newRubberBand, button)
|
|
|
|
# Layout the frame
|
|
sizer = wx.BoxSizer(wx.VERTICAL)
|
|
sizer.Add(panel, 1, wx.EXPAND | wx.ALL, 5)
|
|
sizer.Add(button, 0, wx.ALIGN_CENTER | wx.ALL, 5)
|
|
frame.SetAutoLayout(1)
|
|
frame.SetSizer(sizer)
|
|
frame.Show(1)
|
|
app.MainLoop()
|