Some random test apps that I've been playing with

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@42803 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

wxPython/tests/test_bufDcBlit.py

@@ -0,0 +1,85 @@
+import wx
+import os
+print "PID:", os.getpid()
+
+count = 0
+
+class ResultsFrame(wx.Frame):
+    def __init__(self, parent, bmp):
+        global count
+        count += 1
+        wx.Frame.__init__(self, parent, title=str(count), size=(100,100))
+        p = wx.Panel(self)
+        sb = wx.StaticBitmap(p, -1, bmp, (20,20))
+        self.Show()
+        
+
+
+class TestPanel(wx.Panel):
+    def __init__(self, parent):
+        wx.Panel.__init__(self, parent)
+        b = wx.Button(self, -1, "Test", (50,50))
+        self.Bind(wx.EVT_BUTTON, self.OnButton, b)
+
+    def RunTest(self, bdc, bg, fg):
+        # draw to the buffered dc
+        bdc.SetBackground(wx.Brush(bg))
+        bdc.Clear()
+        bdc.SetPen(wx.Pen(fg, 2))
+        bdc.DrawLine(0,0, 30,30)
+        bdc.DrawLine(0,30, 30,0)
+
+        # now bilt it to a bitmap
+        bmp = wx.EmptyBitmap(30,30)
+        mdc = wx.MemoryDC()
+        mdc.SelectObject(bmp)
+        mdc.Blit(0,0, 30,30, bdc, 0,0)
+        del mdc
+
+        # display the results
+        ResultsFrame(self, bmp)
+        
+
+
+    def OnButton(self, evt):
+       
+        # 1. test a buffered dc not using a buffer bitmap
+        bdc = wx.BufferedDC(wx.ClientDC(self), self.GetSize())
+        self.RunTest(bdc, "yellow", "red")
+        del bdc
+        
+        # 2. now do one that does have a buffer bitmap
+        buf = wx.EmptyBitmap(100,100)
+        bdc = wx.BufferedDC(wx.ClientDC(self), buf)
+        self.RunTest(bdc, "red", "blue")
+        del bdc
+        
+        # 3. now one without a real DC
+        buf = wx.EmptyBitmap(100,100)
+        bdc = wx.BufferedDC(None, buf)
+        self.RunTest(bdc, "purple", "yellow")
+        del bdc
+
+        # 4. finally test a real unbuffered DC
+        dc = wx.ClientDC(self)
+        self.RunTest(dc, "red", "white")
+
+
+        # blit from the last buffer back to the main window
+        buf.SetMaskColour("yellow")
+        mdc = wx.MemoryDC()
+        mdc.SelectObject(buf)
+        dc.Blit(100,100,30,30, mdc, 0,0, useMask=True)
+
+        
+
+app = wx.App(0)
+frm = wx.Frame(None)
+pnl = TestPanel(frm)
+frm.Show()
+app.MainLoop()
+
+
+        
+        
+