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         EVT_PAINT(self, self.OnPaint)
  21
  22         self.SetCursor(wxStockCursor(wxCURSOR_PENCIL))
  23         bmp = images.getTest2Bitmap()
  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
  31     def getWidth(self):
  32         return self.maxWidth
  33
  34     def getHeight(self):
  35         return self.maxHeight
  36
  37
  38     def OnPaint(self, event):
  39         dc = wxPaintDC(self)
  40         self.PrepareDC(dc)
  41         self.DoDrawing(dc)
  42
  43
  44     def DoDrawing(self, dc):
  45         dc.BeginDrawing()
  46         dc.SetPen(wxPen(wxNamedColour('RED')))
  47         dc.DrawRectangle(5, 5, 50, 50)
  48
  49         dc.SetBrush(wxLIGHT_GREY_BRUSH)
  50         dc.SetPen(wxPen(wxNamedColour('BLUE'), 4))
  51         dc.DrawRectangle(15, 15, 50, 50)
  52
  53         dc.SetFont(wxFont(14, wxSWISS, wxNORMAL, wxNORMAL))
  54         dc.SetTextForeground(wxColour(0xFF, 0x20, 0xFF))
  55         te = dc.GetTextExtent("Hello World")
  56         dc.DrawText("Hello World", 60, 65)
  57
  58         dc.SetPen(wxPen(wxNamedColour('VIOLET'), 4))
  59         dc.DrawLine(5, 65+te[1], 60+te[0], 65+te[1])
  60
  61         lst = [(100,110), (150,110), (150,160), (100,160)]
  62         dc.DrawLines(lst, -60)
  63         dc.SetPen(wxGREY_PEN)
  64         dc.DrawPolygon(lst, 75)
  65         dc.SetPen(wxGREEN_PEN)
  66         dc.DrawSpline(lst+[(100,100)])
  67
  68         dc.DrawBitmap(self.bmp, 200, 20, true)
  69         dc.SetTextForeground(wxColour(0, 0xFF, 0x80))
  70         dc.DrawText("a bitmap", 200, 85)
  71
  72         font = wxFont(20, wxSWISS, wxNORMAL, wxNORMAL)
  73         dc.SetFont(font)
  74         dc.SetTextForeground(wxBLACK)
  75         for a in range(0, 360, 45):
  76             dc.DrawRotatedText("Rotated text...", 300, 300, a)
  77
  78         dc.SetPen(wxTRANSPARENT_PEN)
  79         dc.SetBrush(wxBLUE_BRUSH)
  80         dc.DrawRectangle(50,500,50,50)
  81         dc.DrawRectangle(100,500,50,50)
  82
  83         dc.SetPen(wxPen(wxNamedColour('RED')))
  84         dc.DrawEllipticArc(200, 500, 50, 75, 0, 90)
  85
  86         y = 20
  87         for style in [wxDOT, wxLONG_DASH, wxSHORT_DASH, wxDOT_DASH, wxUSER_DASH]:
  88             pen = wxPen("DARK ORCHID", 1, style)
  89             if style == wxUSER_DASH:
  90                 pen.SetDashes([1, 2, 3, 4, 5, 6, 7, 8])
  91                 pen.SetColour("RED")
  92
  93             dc.SetPen(pen)
  94             dc.DrawLine(300, y, 400, y)
  95             y = y + 10
  96
  97         self.DrawSavedLines(dc)
  98         dc.EndDrawing()
  99
 100
 101
 102     def DrawSavedLines(self, dc):
 103         dc.SetPen(wxPen(wxNamedColour('MEDIUM FOREST GREEN'), 4))
 104         for line in self.lines:
 105             for coords in line:
 106                 apply(dc.DrawLine, coords)
 107
 108
 109     def SetXY(self, event):
 110         self.x, self.y = self.ConvertEventCoords(event)
 111
 112     def ConvertEventCoords(self, event):
 113         xView, yView = self.GetViewStart()
 114         xDelta, yDelta = self.GetScrollPixelsPerUnit()
 115         return (event.GetX() + (xView * xDelta),
 116                 event.GetY() + (yView * yDelta))
 117
 118     def OnLeftButtonEvent(self, event):
 119         if event.LeftDown():
 120             self.SetXY(event)
 121             self.curLine = []
 122             self.CaptureMouse()
 123
 124         elif event.Dragging():
 125             dc = wxClientDC(self)
 126             self.PrepareDC(dc)
 127             dc.BeginDrawing()
 128             dc.SetPen(wxPen(wxNamedColour('MEDIUM FOREST GREEN'), 4))
 129             coords = (self.x, self.y) + self.ConvertEventCoords(event)
 130             self.curLine.append(coords)
 131             apply(dc.DrawLine, coords)
 132             self.SetXY(event)
 133             dc.EndDrawing()
 134
 135         elif event.LeftUp():
 136             self.lines.append(self.curLine)
 137             self.curLine = []
 138             self.ReleaseMouse()
 139
 140
 141 ## This is an example of what to do for the EVT_MOUSEWHEEL event,
 142 ## but since wxScrolledWindow does this already it's not
 143 ## necessary to do it ourselves.
 144
 145 ##     wheelScroll = 0
 146 ##     def OnWheel(self, evt):
 147 ##         delta = evt.GetWheelDelta()
 148 ##         rot = evt.GetWheelRotation()
 149 ##         linesPer = evt.GetLinesPerAction()
 150 ##         ws = self.wheelScroll
 151 ##         ws = ws + rot
 152 ##         lines = ws / delta
 153 ##         ws = ws - lines * delta
 154 ##         self.wheelScroll = ws
 155 ##         if lines != 0:
 156 ##             lines = lines * linesPer
 157 ##             vsx, vsy = self.GetViewStart()
 158 ##             scrollTo = vsy - lines
 159 ##             self.Scroll(-1, scrollTo)
 160
 161 #---------------------------------------------------------------------------
 162
 163 def runTest(frame, nb, log):
 164     win = MyCanvas(nb)
 165     return win
 166
 167 #---------------------------------------------------------------------------
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 180
 181 overview = """\
 182 """