utils/wxPython/demo/wxScrolledWindow.py

   1
   2 from wxPython.wx import *
   3
   4 #---------------------------------------------------------------------------
   5
   6 class MyCanvas(wxScrolledWindow):
   7     def __init__(self, parent, id = -1, size = wxDefaultSize):
   8         wxScrolledWindow.__init__(self, parent, id, wxPoint(0, 0), size, wxSUNKEN_BORDER)
   9
  10         self.lines = []
  11         self.maxWidth  = 1000
  12         self.maxHeight = 1000
  13
  14         self.SetBackgroundColour(wxNamedColor("WHITE"))
  15         self.Connect(-1, -1, wxEVT_LEFT_DOWN, self.OnLeftButtonEvent)
  16         self.Connect(-1, -1, wxEVT_LEFT_UP,   self.OnLeftButtonEvent)
  17         self.Connect(-1, -1, wxEVT_MOTION,    self.OnLeftButtonEvent)
  18
  19         self.SetCursor(wxStockCursor(wxCURSOR_PENCIL))
  20         bmp = wxBitmap('bitmaps/test2.bmp', wxBITMAP_TYPE_BMP)
  21         mask = wxMaskColour(bmp, wxBLUE)
  22         bmp.SetMask(mask)
  23         self.bmp = bmp
  24
  25         self.SetScrollbars(20, 20, self.maxWidth/20, self.maxHeight/20)
  26
  27     def getWidth(self):
  28         return self.maxWidth
  29
  30     def getHeight(self):
  31         return self.maxHeight
  32
  33
  34     def OnPaint(self, event):
  35         dc = wxPaintDC(self)
  36         self.PrepareDC(dc)
  37         self.DoDrawing(dc)
  38
  39
  40     def DoDrawing(self, dc):
  41         dc.BeginDrawing()
  42         pen1 = wxPen(wxNamedColour('RED'))
  43         dc.SetPen(pen1)
  44         dc.DrawRectangle(5, 5, 50, 50)
  45
  46         dc.SetBrush(wxLIGHT_GREY_BRUSH)
  47         dc.SetPen(wxPen(wxNamedColour('BLUE'), 4))
  48         dc.DrawRectangle(15, 15, 50, 50)
  49
  50         font = wxFont(14, wxSWISS, wxNORMAL, wxNORMAL)
  51         dc.SetFont(font)
  52         dc.SetTextForeground(wxColour(0xFF, 0x20, 0xFF))
  53         te = dc.GetTextExtent("Hello World")
  54         dc.DrawText("Hello World", 60, 65)
  55
  56         dc.SetPen(wxPen(wxNamedColour('VIOLET'), 4))
  57         dc.DrawLine(5, 65+te[1], 60+te[0], 65+te[1])
  58
  59         lst = [(100,110), (150,110), (150,160), (100,160)]
  60         dc.DrawLines(lst, -60)
  61         dc.SetPen(wxGREY_PEN)
  62         dc.DrawPolygon(lst, 75)
  63         dc.SetPen(wxGREEN_PEN)
  64         dc.DrawSpline(lst+[(100,100)])
  65
  66         dc.DrawBitmap(self.bmp, 200, 20, true)
  67         dc.SetTextForeground(wxColour(0, 0xFF, 0x80))
  68         dc.DrawText("a bitmap", 200, 85)
  69
  70         self.DrawSavedLines(dc)
  71         dc.EndDrawing()
  72
  73
  74     def DrawSavedLines(self, dc):
  75         dc.SetPen(wxPen(wxNamedColour('MEDIUM FOREST GREEN'), 4))
  76         for line in self.lines:
  77             for coords in line:
  78                 apply(dc.DrawLine, coords)
  79
  80
  81     def SetXY(self, event):
  82         self.x, self.y = self.ConvertEventCoords(event)
  83
  84     def ConvertEventCoords(self, event):
  85         xView, yView = self.ViewStart()
  86         xDelta, yDelta = self.GetScrollPixelsPerUnit()
  87         return (event.GetX() + (xView * xDelta),
  88                 event.GetY() + (yView * yDelta))
  89
  90     def OnLeftButtonEvent(self, event):
  91         if event.LeftDown():
  92             self.SetXY(event)
  93             self.curLine = []
  94
  95         elif event.Dragging():
  96             dc = wxClientDC(self)
  97             self.PrepareDC(dc)
  98             dc.BeginDrawing()
  99             dc.SetPen(wxPen(wxNamedColour('MEDIUM FOREST GREEN'), 4))
 100             coords = (self.x, self.y) + self.ConvertEventCoords(event)
 101             self.curLine.append(coords)
 102             apply(dc.DrawLine, coords)
 103             self.SetXY(event)
 104             dc.EndDrawing()
 105
 106         elif event.LeftUp():
 107             self.lines.append(self.curLine)
 108             self.curLine = []
 109
 110 #---------------------------------------------------------------------------
 111
 112 def runTest(frame, nb, log):
 113     win = MyCanvas(nb)
 114     return win
 115
 116 #---------------------------------------------------------------------------
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 129
 130 overview = """\
 131 """