wxPython/demo/ColourDB.py

   1
   2 from wxPython.wx import *
   3 from wxPython.lib import colourdb
   4
   5 import images
   6
   7
   8 # This loads a whole bunch of new color names and values
   9 # into wxTheColourDatabase
  10
  11 colourdb.updateColourDB()
  12
  13 #----------------------------------------------------------------------
  14
  15 class TestWindow(wxScrolledWindow):
  16     def __init__(self, parent):
  17         wxScrolledWindow.__init__(self, parent, -1)
  18
  19         self.clrList = colourdb.getColourList()
  20         self.bg_bmp = images.getGridBGBitmap()
  21
  22         EVT_PAINT(self, self.OnPaint)
  23         EVT_ERASE_BACKGROUND(self, self.OnEraseBackground)
  24         #self.SetBackgroundColour("WHITE")
  25
  26         self.font = wxFont(10, wxSWISS, wxNORMAL, wxNORMAL)
  27         dc = wxClientDC(self)
  28         dc.SetFont(self.font)
  29
  30         w,h,d,e = dc.GetFullTextExtent("Wy") # a wide character and one that decends
  31         self.textHeight = h + d
  32         self.lineHeight = self.textHeight + 5
  33         self.cellWidth = w
  34
  35         numCells = 24
  36         self.SetScrollbars(self.cellWidth, self.lineHeight, numCells, len(self.clrList) + 2)
  37
  38
  39     def TileBackground(self, dc):
  40         # tile the background bitmap
  41         sz = self.GetClientSize()
  42         w = self.bg_bmp.GetWidth()
  43         h = self.bg_bmp.GetHeight()
  44
  45         # adjust for scrolled position
  46         spx, spy = self.GetScrollPixelsPerUnit()
  47         vsx, vsy = self.GetViewStart()
  48         dx,  dy  = (spx * vsx) % w, (spy * vsy) % h
  49
  50         x = -dx
  51         while x < sz.width:
  52             y = -dy
  53             while y < sz.height:
  54                 dc.DrawBitmap(self.bg_bmp, x, y)
  55                 y = y + h
  56             x = x + w
  57
  58
  59     def OnEraseBackground(self, evt):
  60         dc = evt.GetDC()
  61         if not dc:
  62             dc = wxClientDC(self)
  63         self.TileBackground(dc)
  64
  65
  66     def OnPaint(self, evt):
  67         dc = wxPaintDC(self)
  68         self.PrepareDC(dc)
  69         self.Draw(dc, self.GetUpdateRegion(), self.GetViewStart())
  70
  71
  72     def Draw(self, dc, rgn=None, vs=None):
  73         dc.BeginDrawing()
  74         dc.SetTextForeground("BLACK")
  75         dc.SetPen(wxPen("BLACK", 1, wxSOLID))
  76         dc.SetFont(self.font)
  77         colours = self.clrList
  78         numColours = len(colours)
  79
  80         if rgn:
  81             # determine the subset that has been exposed and needs drawn
  82             rect = rgn.GetBox()
  83             pixStart = vs[1]*self.lineHeight + rect.y
  84             pixStop  = pixStart + rect.height
  85             start = pixStart / self.lineHeight - 1
  86             stop = pixStop / self.lineHeight
  87         else:
  88             start = 0
  89             stop = len(numColours)
  90
  91         for line in range(max(0,start), min(stop,numColours)):
  92             clr = colours[line]
  93             y = (line+1) * self.lineHeight + 2
  94             dc.DrawText(clr, self.cellWidth, y)
  95
  96             brush = wxBrush(clr, wxSOLID)
  97             dc.SetBrush(brush)
  98             dc.DrawRectangle(12 * self.cellWidth, y, 6 * self.cellWidth, self.textHeight)
  99
 100         dc.EndDrawing()
 101
 102
 103
 104 #----------------------------------------------------------------------
 105
 106
 107 def runTest(frame, nb, log):
 108     win = TestWindow(nb)
 109     return win
 110
 111 #----------------------------------------------------------------------
 112
 113 overview = """
 114 """