wx.ScrolledWindow wx.PseudoDC
# encoding: utf-8
import logging
import random
import wx
import wx.lib.inspection
def GetMyBitmap():
image = wx.Image("0.png", wx.BITMAP_TYPE_PNG)
return wx.BitmapFromImage(image)
ID_BTN_SPY = wx.NewId()
W = 2000
H = 2000
SW = 150
SH = 150
SHAPE_COUNT = 2500
hitradius = 5
colours = [
"BLACK",
"BLUE",
"BLUE VIOLET",
"BROWN",
"CYAN",]
class MyCanvas(wx.ScrolledWindow):
def RandomPen(self):
c = random.choice(colours)
t = random.randint(1, 4)
if not self.pen_cache.has_key( (c, t) ):
self.pen_cache[(c, t)] = wx.Pen(c, t)
return self.pen_cache[(c, t)]
def RandomColor(self):
return random.choice(colours)
def RandomBrush(self):
c = random.choice(colours)
if not self.brush_cache.has_key(c):
self.brush_cache[c] = wx.Brush(c)
return self.brush_cache[c]
def DoDrawing(self, dc):
random.seed()
self.objids = []
self.boundsdict = {}
dc.BeginDrawing()
id = wx.NewId()
dc.SetId(id)
w,h = self.bmp.GetSize()
x = w
y = h
dc.DrawBitmap(self.bmp,x,y,True)
dc.SetIdBounds(id,wx.Rect(x,y,w,h))
self.objids.append(id)
dc.EndDrawing()
def __init__(self, parent, id, log, size = wx.DefaultSize):
wx.ScrolledWindow.__init__(self, parent, id, (0, 0), size=size, style=wx.SUNKEN_BORDER)
self.lines = []
self.maxWidth = W
self.maxHeight = H
self.x = self.y = 0
self.curLine = []
self.drawing = False
self.SetBackgroundColour("WHITE")
bmp = GetMyBitmap()
mask = wx.Mask(bmp, wx.BLUE)
bmp.SetMask(mask)
self.bmp = bmp
self.SetVirtualSize((self.maxWidth, self.maxHeight))
self.SetScrollRate(20,20)
# create a PseudoDC to record our drawing
self.pdc = wx.PseudoDC()
self.pen_cache = {}
self.brush_cache = {}
self.DoDrawing(self.pdc)
log.info('Created PseudoDC draw list with %d operations!'%self.pdc.GetLen())
self.Bind(wx.EVT_PAINT, self.OnPaint)
self.Bind(wx.EVT_ERASE_BACKGROUND, lambda x:None)
self.Bind(wx.EVT_MOUSE_EVENTS, self.OnMouse)
# vars for handling mouse clicks
self.dragid = -1
self.lastpos = (0,0)
def OnMouse(self, event):
pass
def OnPaint(self, event):
# Create a buffered paint DC. It will create the real
# wx.PaintDC and then blit the bitmap to it when dc is
# deleted.
dc = wx.BufferedPaintDC(self)
# use PrepateDC to set position correctly
self.PrepareDC(dc)
# we need to clear the dc BEFORE calling PrepareDC
bg = wx.Brush(self.GetBackgroundColour())
dc.SetBackground(bg)
dc.Clear()
# create a clipping rect from our position and size
# and the Update Region
xv, yv = self.GetViewStart()
dx, dy = self.GetScrollPixelsPerUnit()
x, y = (xv * dx, yv * dy)
rgn = self.GetUpdateRegion()
rgn.Offset(x,y)
r = rgn.GetBox()
# draw to the dc using the calculated clipping rect
self.pdc.DrawToDCClipped(dc,r)
class MyFrame(wx.Frame):
def OnBtnSpy(self, evt):
print 'click btn spy'
wx.lib.inspection.InspectionTool().Show()
def __init__(self):
wx.Frame.__init__(self, None, -1, "My Frame", size=(300,300))
self.log = None
panel0 = wx.Panel(self, -1)
btn1 = wx.Button(panel0, ID_BTN_SPY, label='spy++')
self.log = logging
win = MyCanvas(self, -1, self.log)
sz0 = wx.BoxSizer(wx.VERTICAL)
sz0.Add(panel0, flag=wx.EXPAND)
sz0.Add(win, proportion=1, flag=wx.EXPAND)
self.SetSizer(sz0)
self.Bind(wx.EVT_BUTTON, self.OnBtnSpy, id=ID_BTN_SPY)
if __name__ == '__main__':
app = wx.App()
frame = MyFrame()
frame.Show(True)
app.MainLoop()
