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         EVT_LEFT_DOWN(self, self.OnLeftButtonEvent)
  16         EVT_LEFT_UP(self,   self.OnLeftButtonEvent)
  17         EVT_MOTION(self,    self.OnLeftButtonEvent)
  18
  19         EVT_PAINT(self, self.OnPaint)
  20
  21
  22         self.SetCursor(wxStockCursor(wxCURSOR_PENCIL))
  23         bmp = wxBitmap('bitmaps/test2.bmp', wxBITMAP_TYPE_BMP)
  24         mask = wxMaskColour(bmp, wxBLUE)
  25         bmp.SetMask(mask)
  26         self.bmp = bmp
  27
  28         self.SetScrollbars(20, 20, self.maxWidth/20, self.maxHeight/20)
  29
  30     def getWidth(self):
  31         return self.maxWidth
  32
  33     def getHeight(self):
  34         return self.maxHeight
  35
  36
  37     def OnPaint(self, event):
  38         dc = wxPaintDC(self)
  39         self.PrepareDC(dc)
  40         self.DoDrawing(dc)
  41
  42
  43     def DoDrawing(self, dc):
  44         dc.BeginDrawing()
  45         dc.SetPen(wxPen(wxNamedColour('RED')))
  46         dc.DrawRectangle(5, 5, 50, 50)
  47
  48         dc.SetBrush(wxLIGHT_GREY_BRUSH)
  49         dc.SetPen(wxPen(wxNamedColour('BLUE'), 4))
  50         dc.DrawRectangle(15, 15, 50, 50)
  51
  52         dc.SetFont(wxFont(14, wxSWISS, wxNORMAL, wxNORMAL))
  53         dc.SetTextForeground(wxColour(0xFF, 0x20, 0xFF))
  54         te = dc.GetTextExtent("Hello World")
  55         dc.DrawText("Hello World", 60, 65)
  56
  57         dc.SetPen(wxPen(wxNamedColour('VIOLET'), 4))
  58         dc.DrawLine(5, 65+te[1], 60+te[0], 65+te[1])
  59
  60         lst = [(100,110), (150,110), (150,160), (100,160)]
  61         dc.DrawLines(lst, -60)
  62         dc.SetPen(wxGREY_PEN)
  63         dc.DrawPolygon(lst, 75)
  64         dc.SetPen(wxGREEN_PEN)
  65         dc.DrawSpline(lst+[(100,100)])
  66
  67         dc.DrawBitmap(self.bmp, 200, 20, true)
  68         dc.SetTextForeground(wxColour(0, 0xFF, 0x80))
  69         dc.DrawText("a bitmap", 200, 85)
  70
  71         font = wxFont(20, wxSWISS, wxNORMAL, wxNORMAL)
  72         dc.SetFont(font)
  73         dc.SetTextForeground(wxBLACK)
  74         for a in range(0, 360, 45):
  75             dc.DrawRotatedText("Rotated text...", 300, 300, a)
  76
  77         dc.SetPen(wxTRANSPARENT_PEN)
  78         dc.SetBrush(wxBLUE_BRUSH)
  79         dc.DrawRectangle(50,500,50,50)
  80         dc.DrawRectangle(100,500,50,50)
  81
  82         dc.SetPen(wxPen(wxNamedColour('RED')))
  83         dc.DrawEllipticArc(200, 500, 50, 75, 0, 90)
  84
  85         self.DrawSavedLines(dc)
  86         dc.EndDrawing()
  87
  88
  89
  90     def DrawSavedLines(self, dc):
  91         dc.SetPen(wxPen(wxNamedColour('MEDIUM FOREST GREEN'), 4))
  92         for line in self.lines:
  93             for coords in line:
  94                 apply(dc.DrawLine, coords)
  95
  96
  97     def SetXY(self, event):
  98         self.x, self.y = self.ConvertEventCoords(event)
  99
 100     def ConvertEventCoords(self, event):
 101         xView, yView = self.GetViewStart()
 102         xDelta, yDelta = self.GetScrollPixelsPerUnit()
 103         return (event.GetX() + (xView * xDelta),
 104                 event.GetY() + (yView * yDelta))
 105
 106     def OnLeftButtonEvent(self, event):
 107         if event.LeftDown():
 108             self.SetXY(event)
 109             self.curLine = []
 110             self.CaptureMouse()
 111
 112         elif event.Dragging():
 113             dc = wxClientDC(self)
 114             self.PrepareDC(dc)
 115             dc.BeginDrawing()
 116             dc.SetPen(wxPen(wxNamedColour('MEDIUM FOREST GREEN'), 4))
 117             coords = (self.x, self.y) + self.ConvertEventCoords(event)
 118             self.curLine.append(coords)
 119             apply(dc.DrawLine, coords)
 120             self.SetXY(event)
 121             dc.EndDrawing()
 122
 123         elif event.LeftUp():
 124             self.lines.append(self.curLine)
 125             self.curLine = []
 126             self.ReleaseMouse()
 127
 128 #---------------------------------------------------------------------------
 129
 130 def runTest(frame, nb, log):
 131     win = MyCanvas(nb)
 132     return win
 133
 134 #---------------------------------------------------------------------------
 135
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 147
 148 overview = """\
 149 """