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         self.count = 0
  16
  17         self.SetBackgroundColour("WHITE")
  18         EVT_LEFT_DOWN(self, self.OnLeftButtonEvent)
  19         EVT_LEFT_UP(self,   self.OnLeftButtonEvent)
  20         EVT_MOTION(self,    self.OnLeftButtonEvent)
  21         EVT_PAINT(self, self.OnPaint)
  22
  23         self.SetCursor(wxStockCursor(wxCURSOR_PENCIL))
  24         bmp = images.getTest2Bitmap()
  25         mask = wxMaskColour(bmp, wxBLUE)
  26         bmp.SetMask(mask)
  27         self.bmp = bmp
  28
  29         self.SetScrollbars(20, 20, self.maxWidth/20, self.maxHeight/20)
  30
  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         #self.count += 1
  41         #print self.count, "begin paint...",
  42         dc = wxPaintDC(self)
  43         self.PrepareDC(dc)
  44         self.DoDrawing(dc)
  45         #print "end paint"
  46
  47
  48     def DoDrawing(self, dc):
  49         dc.BeginDrawing()
  50         dc.SetPen(wxPen('RED'))
  51         dc.DrawRectangle(5, 5, 50, 50)
  52
  53         dc.SetBrush(wxLIGHT_GREY_BRUSH)
  54         dc.SetPen(wxPen('BLUE', 4))
  55         dc.DrawRectangle(15, 15, 50, 50)
  56
  57         dc.SetFont(wxFont(14, wxSWISS, wxNORMAL, wxNORMAL))
  58         dc.SetTextForeground(wxColour(0xFF, 0x20, 0xFF))
  59         te = dc.GetTextExtent("Hello World")
  60         dc.DrawText("Hello World", 60, 65)
  61
  62         dc.SetPen(wxPen('VIOLET', 4))
  63         dc.DrawLine(5, 65+te[1], 60+te[0], 65+te[1])
  64
  65         lst = [(100,110), (150,110), (150,160), (100,160)]
  66         dc.DrawLines(lst, -60)
  67         dc.SetPen(wxGREY_PEN)
  68         dc.DrawPolygon(lst, 75)
  69         dc.SetPen(wxGREEN_PEN)
  70         dc.DrawSpline(lst+[(100,100)])
  71
  72         dc.DrawBitmap(self.bmp, 200, 20, true)
  73         dc.SetTextForeground(wxColour(0, 0xFF, 0x80))
  74         dc.DrawText("a bitmap", 200, 85)
  75
  76         font = wxFont(20, wxSWISS, wxNORMAL, wxNORMAL)
  77         dc.SetFont(font)
  78         dc.SetTextForeground(wxBLACK)
  79         for a in range(0, 360, 45):
  80             dc.DrawRotatedText("Rotated text...", 300, 300, a)
  81
  82         dc.SetPen(wxTRANSPARENT_PEN)
  83         dc.SetBrush(wxBLUE_BRUSH)
  84         dc.DrawRectangle(50,500,50,50)
  85         dc.DrawRectangle(100,500,50,50)
  86
  87         dc.SetPen(wxPen('RED'))
  88         dc.DrawEllipticArc(200, 500, 50, 75, 0, 90)
  89
  90         y = 20
  91         for style in [wxDOT, wxLONG_DASH, wxSHORT_DASH, wxDOT_DASH, wxUSER_DASH]:
  92             pen = wxPen("DARK ORCHID", 1, style)
  93             if style == wxUSER_DASH:
  94                 pen.SetDashes([1, 2, 3, 4, 5, 6, 7, 8])
  95                 pen.SetColour("RED")
  96             dc.SetPen(pen)
  97             dc.DrawLine(300, y, 400, y)
  98             y = y + 10
  99
 100         dc.SetBrush(wxTRANSPARENT_BRUSH)
 101         dc.SetPen(wxPen(wxColour(0xFF, 0x20, 0xFF), 1, wxSOLID))
 102         dc.DrawRectangle(450, 50, 100, 100)
 103         old_pen = dc.GetPen()
 104         new_pen = wxPen("BLACK", 5)
 105         dc.SetPen(new_pen)
 106         dc.DrawRectangle(470, 70, 60, 60)
 107         dc.SetPen(old_pen)
 108         dc.DrawRectangle(490, 90, 20, 20)
 109
 110
 111         self.DrawSavedLines(dc)
 112         dc.EndDrawing()
 113
 114
 115     def DrawSavedLines(self, dc):
 116         dc.SetPen(wxPen('MEDIUM FOREST GREEN', 4))
 117         for line in self.lines:
 118             for coords in line:
 119                 apply(dc.DrawLine, coords)
 120
 121
 122     def SetXY(self, event):
 123         self.x, self.y = self.ConvertEventCoords(event)
 124
 125     def ConvertEventCoords(self, event):
 126         xView, yView = self.GetViewStart()
 127         xDelta, yDelta = self.GetScrollPixelsPerUnit()
 128         return (event.GetX() + (xView * xDelta),
 129                 event.GetY() + (yView * yDelta))
 130
 131     def OnLeftButtonEvent(self, event):
 132         if event.LeftDown():
 133             self.SetXY(event)
 134             self.curLine = []
 135             self.CaptureMouse()
 136
 137         elif event.Dragging():
 138             dc = wxClientDC(self)
 139             self.PrepareDC(dc)
 140             dc.BeginDrawing()
 141             dc.SetPen(wxPen('MEDIUM FOREST GREEN', 4))
 142             coords = (self.x, self.y) + self.ConvertEventCoords(event)
 143             self.curLine.append(coords)
 144             apply(dc.DrawLine, coords)
 145             self.SetXY(event)
 146             dc.EndDrawing()
 147
 148         elif event.LeftUp():
 149             self.lines.append(self.curLine)
 150             self.curLine = []
 151             self.ReleaseMouse()
 152
 153
 154 ## This is an example of what to do for the EVT_MOUSEWHEEL event,
 155 ## but since wxScrolledWindow does this already it's not
 156 ## necessary to do it ourselves.
 157
 158 ##     wheelScroll = 0
 159 ##     def OnWheel(self, evt):
 160 ##         delta = evt.GetWheelDelta()
 161 ##         rot = evt.GetWheelRotation()
 162 ##         linesPer = evt.GetLinesPerAction()
 163 ##         ws = self.wheelScroll
 164 ##         ws = ws + rot
 165 ##         lines = ws / delta
 166 ##         ws = ws - lines * delta
 167 ##         self.wheelScroll = ws
 168 ##         if lines != 0:
 169 ##             lines = lines * linesPer
 170 ##             vsx, vsy = self.GetViewStart()
 171 ##             scrollTo = vsy - lines
 172 ##             self.Scroll(-1, scrollTo)
 173
 174 #---------------------------------------------------------------------------
 175
 176 def runTest(frame, nb, log):
 177     win = MyCanvas(nb)
 178     return win
 179
 180 #---------------------------------------------------------------------------
 181
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 193
 194 overview = """\
 195 """