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
  12         self.SetBackgroundColour(wxNamedColor("WHITE"))
  13         self.Connect(-1, -1, wxEVT_LEFT_DOWN, self.OnLeftButtonEvent)
  14         self.Connect(-1, -1, wxEVT_LEFT_UP,   self.OnLeftButtonEvent)
  15         self.Connect(-1, -1, wxEVT_MOTION,    self.OnLeftButtonEvent)
  16
  17         self.SetCursor(wxStockCursor(wxCURSOR_PENCIL))
  18         bmp = wxBitmap('bitmaps/test2.bmp', wxBITMAP_TYPE_BMP)
  19         self.bmp = bmp
  20
  21         self.SetScrollbars(20, 20, 50, 50)
  22
  23
  24     def OnPaint(self, event):
  25         dc = wxPaintDC(self)
  26         self.PrepareDC(dc)
  27         self.DoDrawing(dc)
  28
  29
  30     def DoDrawing(self, dc):
  31         dc.BeginDrawing()
  32         #dc.Clear()
  33         pen1 = wxPen(wxNamedColour('RED'))
  34         dc.SetPen(pen1)
  35         dc.DrawRectangle(5, 5, 50, 50)
  36
  37         dc.SetBrush(wxLIGHT_GREY_BRUSH)
  38         dc.SetPen(wxPen(wxNamedColour('BLUE'), 4))
  39         dc.DrawRectangle(15, 15, 50, 50)
  40
  41         font = wxFont(14, wxSWISS, wxNORMAL, wxNORMAL)
  42         dc.SetFont(font)
  43         dc.SetTextForeground(wxColour(0xFF, 0x20, 0xFF))
  44         te = dc.GetTextExtent("Hello World")
  45         dc.DrawText("Hello World", 60, 65)
  46
  47         dc.SetPen(wxPen(wxNamedColour('VIOLET'), 4))
  48         dc.DrawLine(5, 65+te[1], 60+te[0], 65+te[1])
  49
  50         lst = [(100,110), (150,110), (150,160), (100,160)]
  51         dc.DrawLines(lst, -60)
  52         dc.SetPen(wxGREY_PEN)
  53         dc.DrawPolygon(lst, 75)
  54         dc.SetPen(wxGREEN_PEN)
  55         dc.DrawSpline(lst+[(100,100)])
  56
  57         dc.DrawBitmap(self.bmp, 200, 20)
  58         dc.SetTextForeground(wxColour(0, 0xFF, 0x80))
  59         dc.DrawText("a bitmap", 200, 80)
  60
  61         self.DrawSavedLines(dc)
  62         dc.EndDrawing()
  63
  64
  65     def DrawSavedLines(self, dc):
  66         dc.SetPen(wxPen(wxNamedColour('MEDIUM FOREST GREEN'), 4))
  67         for line in self.lines:
  68             for coords in line:
  69                 apply(dc.DrawLine, coords)
  70
  71
  72     def SetXY(self, event):
  73         self.x, self.y = self.ConvertEventCoords(event)
  74
  75     def ConvertEventCoords(self, event):
  76         xView, yView = self.ViewStart()
  77         xDelta, yDelta = self.GetScrollPixelsPerUnit()
  78         return (event.GetX() + (xView * xDelta),
  79                 event.GetY() + (yView * yDelta))
  80
  81     def OnLeftButtonEvent(self, event):
  82         if event.LeftDown():
  83             self.SetXY(event)
  84             self.curLine = []
  85
  86         elif event.Dragging():
  87             dc = wxClientDC(self)
  88             self.PrepareDC(dc)
  89             dc.BeginDrawing()
  90             dc.SetPen(wxPen(wxNamedColour('MEDIUM FOREST GREEN'), 4))
  91             coords = (self.x, self.y) + self.ConvertEventCoords(event)
  92             self.curLine.append(coords)
  93             apply(dc.DrawLine, coords)
  94             self.SetXY(event)
  95             dc.EndDrawing()
  96
  97         elif event.LeftUp():
  98             self.lines.append(self.curLine)
  99             self.curLine = []
 100
 101 #---------------------------------------------------------------------------
 102
 103 def runTest(frame, nb, log):
 104     win = MyCanvas(nb)
 105     return win
 106
 107 #---------------------------------------------------------------------------
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 120
 121 overview = """\
 122 """