wxPython/demo/wxScrolledWindow.py

   1
   2 from wxPython.wx import *
   3
   4 import images
   5
   6 #---------------------------------------------------------------------------
   7
   8 class MyCanvas(wxScrolledWindow):
   9     def __init__(self, parent, id = -1, size = wxDefaultSize):
  10         wxScrolledWindow.__init__(self, parent, id, wxPoint(0, 0), size, wxSUNKEN_BORDER)
  11
  12         self.lines = []
  13         self.maxWidth  = 1000
  14         self.maxHeight = 1000
  15
  16         self.SetBackgroundColour(wxNamedColor("WHITE"))
  17         EVT_LEFT_DOWN(self, self.OnLeftButtonEvent)
  18         EVT_LEFT_UP(self,   self.OnLeftButtonEvent)
  19         EVT_MOTION(self,    self.OnLeftButtonEvent)
  20
  21         EVT_PAINT(self, self.OnPaint)
  22
  23
  24         self.SetCursor(wxStockCursor(wxCURSOR_PENCIL))
  25         bmp = images.getTest2Bitmap()
  26         mask = wxMaskColour(bmp, wxBLUE)
  27         bmp.SetMask(mask)
  28         self.bmp = bmp
  29
  30         self.SetScrollbars(20, 20, self.maxWidth/20, self.maxHeight/20)
  31
  32     def getWidth(self):
  33         return self.maxWidth
  34
  35     def getHeight(self):
  36         return self.maxHeight
  37
  38
  39     def OnPaint(self, event):
  40         dc = wxPaintDC(self)
  41         self.PrepareDC(dc)
  42         self.DoDrawing(dc)
  43
  44
  45     def DoDrawing(self, dc):
  46         dc.BeginDrawing()
  47         dc.SetPen(wxPen(wxNamedColour('RED')))
  48         dc.DrawRectangle(5, 5, 50, 50)
  49
  50         dc.SetBrush(wxLIGHT_GREY_BRUSH)
  51         dc.SetPen(wxPen(wxNamedColour('BLUE'), 4))
  52         dc.DrawRectangle(15, 15, 50, 50)
  53
  54         dc.SetFont(wxFont(14, wxSWISS, wxNORMAL, wxNORMAL))
  55         dc.SetTextForeground(wxColour(0xFF, 0x20, 0xFF))
  56         te = dc.GetTextExtent("Hello World")
  57         dc.DrawText("Hello World", 60, 65)
  58
  59         dc.SetPen(wxPen(wxNamedColour('VIOLET'), 4))
  60         dc.DrawLine(5, 65+te[1], 60+te[0], 65+te[1])
  61
  62         lst = [(100,110), (150,110), (150,160), (100,160)]
  63         dc.DrawLines(lst, -60)
  64         dc.SetPen(wxGREY_PEN)
  65         dc.DrawPolygon(lst, 75)
  66         dc.SetPen(wxGREEN_PEN)
  67         dc.DrawSpline(lst+[(100,100)])
  68
  69         dc.DrawBitmap(self.bmp, 200, 20, true)
  70         dc.SetTextForeground(wxColour(0, 0xFF, 0x80))
  71         dc.DrawText("a bitmap", 200, 85)
  72
  73         font = wxFont(20, wxSWISS, wxNORMAL, wxNORMAL)
  74         dc.SetFont(font)
  75         dc.SetTextForeground(wxBLACK)
  76         for a in range(0, 360, 45):
  77             dc.DrawRotatedText("Rotated text...", 300, 300, a)
  78
  79         dc.SetPen(wxTRANSPARENT_PEN)
  80         dc.SetBrush(wxBLUE_BRUSH)
  81         dc.DrawRectangle(50,500,50,50)
  82         dc.DrawRectangle(100,500,50,50)
  83
  84         dc.SetPen(wxPen(wxNamedColour('RED')))
  85         dc.DrawEllipticArc(200, 500, 50, 75, 0, 90)
  86
  87         self.DrawSavedLines(dc)
  88         dc.EndDrawing()
  89
  90
  91
  92     def DrawSavedLines(self, dc):
  93         dc.SetPen(wxPen(wxNamedColour('MEDIUM FOREST GREEN'), 4))
  94         for line in self.lines:
  95             for coords in line:
  96                 apply(dc.DrawLine, coords)
  97
  98
  99     def SetXY(self, event):
 100         self.x, self.y = self.ConvertEventCoords(event)
 101
 102     def ConvertEventCoords(self, event):
 103         xView, yView = self.GetViewStart()
 104         xDelta, yDelta = self.GetScrollPixelsPerUnit()
 105         return (event.GetX() + (xView * xDelta),
 106                 event.GetY() + (yView * yDelta))
 107
 108     def OnLeftButtonEvent(self, event):
 109         if event.LeftDown():
 110             self.SetXY(event)
 111             self.curLine = []
 112             self.CaptureMouse()
 113
 114         elif event.Dragging():
 115             dc = wxClientDC(self)
 116             self.PrepareDC(dc)
 117             dc.BeginDrawing()
 118             dc.SetPen(wxPen(wxNamedColour('MEDIUM FOREST GREEN'), 4))
 119             coords = (self.x, self.y) + self.ConvertEventCoords(event)
 120             self.curLine.append(coords)
 121             apply(dc.DrawLine, coords)
 122             self.SetXY(event)
 123             dc.EndDrawing()
 124
 125         elif event.LeftUp():
 126             self.lines.append(self.curLine)
 127             self.curLine = []
 128             self.ReleaseMouse()
 129
 130
 131 ## This is an example of what to do for the EVT_MOUSEWHEEL event,
 132 ## but since wxScrolledWindow does this already it's not
 133 ## necessary to do it ourselves.
 134
 135 ##     wheelScroll = 0
 136 ##     def OnWheel(self, evt):
 137 ##         delta = evt.GetWheelDelta()
 138 ##         rot = evt.GetWheelRotation()
 139 ##         linesPer = evt.GetLinesPerAction()
 140 ##         ws = self.wheelScroll
 141 ##         ws = ws + rot
 142 ##         lines = ws / delta
 143 ##         ws = ws - lines * delta
 144 ##         self.wheelScroll = ws
 145 ##         if lines != 0:
 146 ##             lines = lines * linesPer
 147 ##             vsx, vsy = self.GetViewStart()
 148 ##             scrollTo = vsy - lines
 149 ##             self.Scroll(-1, scrollTo)
 150
 151 #---------------------------------------------------------------------------
 152
 153 def runTest(frame, nb, log):
 154     win = MyCanvas(nb)
 155     return win
 156
 157 #---------------------------------------------------------------------------
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 170
 171 overview = """\
 172 """