utils/wxPython/demo/wxScrolledWindow.py

   1
   2 from wxPython.wx import *
   3
   4 #---------------------------------------------------------------------------
   5
   6 class MyCanvas(wxScrolledWindow):
   7     def __init__(self, parent):
   8         wxScrolledWindow.__init__(self, parent, -1, wxPoint(0, 0), wxPyDefaultSize, 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         self.bmp = bmp
  22
  23         self.SetScrollbars(20, 20, self.maxWidth/20, self.maxHeight/20)
  24
  25     def getWidth(self):
  26         return self.maxWidth
  27
  28     def getHeight(self):
  29         return self.maxHeight
  30
  31
  32     def OnPaint(self, event):
  33         dc = wxPaintDC(self)
  34         self.PrepareDC(dc)
  35         self.DoDrawing(dc)
  36
  37
  38     def DoDrawing(self, dc):
  39         dc.BeginDrawing()
  40         pen1 = wxPen(wxNamedColour('RED'))
  41         dc.SetPen(pen1)
  42         dc.DrawRectangle(5, 5, 50, 50)
  43
  44         dc.SetBrush(wxLIGHT_GREY_BRUSH)
  45         dc.SetPen(wxPen(wxNamedColour('BLUE'), 4))
  46         dc.DrawRectangle(15, 15, 50, 50)
  47
  48         font = wxFont(14, wxSWISS, wxNORMAL, wxNORMAL)
  49         dc.SetFont(font)
  50         dc.SetTextForeground(wxColour(0xFF, 0x20, 0xFF))
  51         te = dc.GetTextExtent("Hello World")
  52         dc.DrawText("Hello World", 60, 65)
  53
  54         dc.SetPen(wxPen(wxNamedColour('VIOLET'), 4))
  55         dc.DrawLine(5, 65+te[1], 60+te[0], 65+te[1])
  56
  57         lst = [(100,110), (150,110), (150,160), (100,160)]
  58         dc.DrawLines(lst, -60)
  59         dc.SetPen(wxGREY_PEN)
  60         dc.DrawPolygon(lst, 75)
  61         dc.SetPen(wxGREEN_PEN)
  62         dc.DrawSpline(lst+[(100,100)])
  63
  64         dc.DrawBitmap(self.bmp, 200, 20)
  65         dc.SetTextForeground(wxColour(0, 0xFF, 0x80))
  66         dc.DrawText("a bitmap", 200, 85)
  67
  68         self.DrawSavedLines(dc)
  69         dc.EndDrawing()
  70
  71
  72     def DrawSavedLines(self, dc):
  73         dc.SetPen(wxPen(wxNamedColour('MEDIUM FOREST GREEN'), 4))
  74         for line in self.lines:
  75             for coords in line:
  76                 apply(dc.DrawLine, coords)
  77
  78
  79     def SetXY(self, event):
  80         self.x, self.y = self.ConvertEventCoords(event)
  81
  82     def ConvertEventCoords(self, event):
  83         xView, yView = self.ViewStart()
  84         xDelta, yDelta = self.GetScrollPixelsPerUnit()
  85         return (event.GetX() + (xView * xDelta),
  86                 event.GetY() + (yView * yDelta))
  87
  88     def OnLeftButtonEvent(self, event):
  89         if event.LeftDown():
  90             self.SetXY(event)
  91             self.curLine = []
  92
  93         elif event.Dragging():
  94             dc = wxClientDC(self)
  95             self.PrepareDC(dc)
  96             dc.BeginDrawing()
  97             dc.SetPen(wxPen(wxNamedColour('MEDIUM FOREST GREEN'), 4))
  98             coords = (self.x, self.y) + self.ConvertEventCoords(event)
  99             self.curLine.append(coords)
 100             apply(dc.DrawLine, coords)
 101             self.SetXY(event)
 102             dc.EndDrawing()
 103
 104         elif event.LeftUp():
 105             self.lines.append(self.curLine)
 106             self.curLine = []
 107
 108 #---------------------------------------------------------------------------
 109
 110 def runTest(frame, nb, log):
 111     win = MyCanvas(nb)
 112     return win
 113
 114 #---------------------------------------------------------------------------
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 127
 128 overview = """\
 129 """