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Overlay.py
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Overlay.py
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#!/usr/bin/env python
from collections import OrderedDict
import wx
#---------------------------------------------------------------------------
class TestPanel(wx.Panel):
def __init__(self, parent, log):
self.log = log
wx.Panel.__init__(self, parent, wx.ID_ANY, style=wx.CLIP_CHILDREN)
## self.SetDoubleBuffered(True)
self.background = wx.Brush(self.GetBackgroundColour())
self.Bind(wx.EVT_PAINT, self.OnPaint)
self.Bind(wx.EVT_SIZE, self.OnSize)
#--Rubberband Overlay
self.Bind(wx.EVT_LEFT_DOWN, self.OnLeftDown)
self.Bind(wx.EVT_LEFT_UP, self.OnLeftUp)
self.Bind(wx.EVT_MOTION, self.OnMouseMove)
self.startPos = None
self.endPos = None
self.overlay = wx.Overlay()
self.cropbitmap = wx.Bitmap('bitmaps/cropshot24x20.png')
self.honeyBitmap = wx.Bitmap('bitmaps/honeycomb300.png')
self.wxPenStylesDict = OrderedDict([
('Solid' , wx.PENSTYLE_SOLID),
('Dot' , wx.PENSTYLE_DOT),
('Long Dash' , wx.PENSTYLE_LONG_DASH),
('Short Dash' , wx.PENSTYLE_SHORT_DASH),
('Dot Dash' , wx.PENSTYLE_DOT_DASH),
('User Dash' , wx.PENSTYLE_USER_DASH),
('Transparent' , wx.PENSTYLE_TRANSPARENT),
#('Stipple' , wx.PENSTYLE_STIPPLE),
('BDiagonal Hatch' , wx.PENSTYLE_BDIAGONAL_HATCH),
('CrossDiag Hatch' , wx.PENSTYLE_CROSSDIAG_HATCH),
('FDiagonal Hatch' , wx.PENSTYLE_FDIAGONAL_HATCH),
('Cross Hatch' , wx.PENSTYLE_CROSS_HATCH),
('Horizontal Hatch' , wx.PENSTYLE_HORIZONTAL_HATCH),
('Vertical Hatch' , wx.PENSTYLE_VERTICAL_HATCH),
])
list = []
for key, value in self.wxPenStylesDict.items():
list.append(key)
self.penstylesCombo = wx.ComboBox(self, -1, choices=list,
size=(150, -1),
style=wx.CB_READONLY)
self.penstylesCombo.SetSelection(0)
self.penstylesCombo.SetToolTip('Pen Style')
self.overlayPenWidth = wx.SpinCtrl(self, -1, value='',
style=wx.SP_ARROW_KEYS,
min=1, max=24, initial=1)
self.overlayPenWidth.SetToolTip('Pen Width')
from wx.lib.colourselect import ColourSelect
self.overlayPenColor = ColourSelect(self, -1, colour=wx.BLUE)
self.overlayPenColor.SetToolTip('Pen Color')
sizer = wx.BoxSizer(wx.HORIZONTAL)
sizer.Add(self.penstylesCombo, 0, wx.ALL, 5)
sizer.Add(self.overlayPenWidth, 0, wx.ALL, 5)
sizer.Add(self.overlayPenColor, 0, wx.ALL, 5)
box = wx.BoxSizer(wx.VERTICAL)
box.Add(sizer, 0)
box.Add((1,1), 1)
self.SetSizer(box)
self.OnSize()
def OnLeftDown(self, event):
# Capture the mouse and save the starting posiiton for the rubber-band
self.CaptureMouse()
self.startPos = event.GetPosition()
## print('self.startPos:', self.startPos)
self.SetFocus()
## print('OnLeftDown')
def OnMouseMove(self, event):
if event.Dragging() and event.LeftIsDown():
evtPos = event.GetPosition()
try:
rect = wx.Rect(topLeft=self.startPos, bottomRight=evtPos)
except TypeError as exc: # topLeft = NoneType. Attempting to double click image or something
return
except Exception as exc:
raise exc
# Draw the rubber-band rectangle using an overlay so it
# will manage keeping the rectangle and the former window
# contents separate.
dc = wx.ClientDC(self)
odc = wx.DCOverlay(self.overlay, dc)
odc.Clear()
# Mac's DC is already the same as a GCDC, and it causes
# problems with the overlay if we try to use an actual
# wx.GCDC so don't try it. If you do not need to use a
# semi-transparent background then you can leave this out.
if 'wxMac' not in wx.PlatformInfo:
dc = wx.GCDC(dc)
# Set the pen, for the box's border
dc.SetPen(wx.Pen(colour=self.overlayPenColor.GetColour(),
width=self.overlayPenWidth.GetValue(),
style=self.wxPenStylesDict[self.penstylesCombo.GetString(self.penstylesCombo.GetSelection())]))
# Create a brush (for the box's interior) with the same colour,
# but 50% transparency.
bc = self.overlayPenColor.GetColour()
bc = wx.Colour(bc.red, bc.green, bc.blue, 0x80)
dc.SetBrush(wx.Brush(bc))
# Draw the rectangle
dc.DrawRectangle(rect)
if evtPos[0] < self.startPos[0]: # draw on left side of rect, not inside it
dc.DrawBitmap(self.cropbitmap,
evtPos[0] - 25 - self.overlayPenWidth.GetValue(),
evtPos[1] - 17)
else:
dc.DrawBitmap(self.cropbitmap,
evtPos[0] + 2 + self.overlayPenWidth.GetValue(),
evtPos[1] - 17)
del odc # Make sure the odc is destroyed before the dc is.
## print('OnMouseMove')
def OnLeftUp(self, event):
if self.HasCapture():
self.ReleaseMouse()
self.endPos = event.GetPosition()
## print('StartPos: %s' %self.startPos)
## print('EndPos: %s' %self.endPos)
self.startPos = None
self.endPos = None
# When the mouse is released we reset the overlay and it
# restores the former content to the window.
dc = wx.ClientDC(self)
odc = wx.DCOverlay(self.overlay, dc)
odc.Clear()
del odc
self.overlay.Reset()
## print('OnLeftUp')
def OnSize(self, event=None):
if event:
event.Skip()
x, y = self.GetSize()
if x <= 0 or y <= 0:
return
self.buffer = wx.Bitmap(x, y)
dc = wx.MemoryDC()
dc.SelectObject(self.buffer)
dc.SetBackground(self.background)
dc.Clear()
dc.DrawBitmap(self.honeyBitmap, 40, 40)
dc.SetFont(wx.Font(wx.FontInfo(18)))
dc.DrawText('Drag the mouse on this window.', 325, 100)
del dc
self.Refresh()
#self.Update()
def OnPaint(self, event):
dc = wx.BufferedPaintDC(self, self.buffer)
#---------------------------------------------------------------------------
def runTest(frame, nb, log):
win = TestPanel(nb, log)
return win
#---------------------------------------------------------------------------
overview = """\
Creates an overlay over an existing window, allowing for
manipulations like rubberbanding, etc
"""
if __name__ == '__main__':
import sys
import os
import run
run.main(['', os.path.basename(sys.argv[0])] + sys.argv[1:])