wxPython/wx/lib/stattext.py

   1 #----------------------------------------------------------------------
   2 # Name:        wx.lib.stattext
   3 # Purpose:     A generic wxGenStaticText class.  Using this should
   4 #              eliminate some of the platform differences in wxStaticText,
   5 #              such as background colours and mouse sensitivity.
   6 #
   7 # Author:      Robin Dunn
   8 #
   9 # Created:     8-July-2002
  10 # RCS-ID:      $Id$
  11 # Copyright:   (c) 2002 by Total Control Software
  12 # Licence:     wxWindows license
  13 #----------------------------------------------------------------------
  14 # 12/12/2003 - Jeff Grimmett (grimmtooth@softhome.net)
  15 #
  16 # o 2.5 compatability update.
  17 # o Untested.
  18 #
  19
  20 import wx
  21
  22 BUFFERED = 0   # In unbuffered mode we can let the theme shine through,
  23                # is there a way to do this when buffering?
  24
  25 #----------------------------------------------------------------------
  26
  27 class GenStaticText(wx.PyControl):
  28     labelDelta = 1
  29
  30     def __init__(self, parent, ID, label,
  31                  pos = wx.DefaultPosition, size = wx.DefaultSize,
  32                  style = 0,
  33                  name = "genstattext"):
  34         wx.PyControl.__init__(self, parent, ID, pos, size, style|wx.NO_BORDER,
  35                              wx.DefaultValidator, name)
  36
  37         wx.PyControl.SetLabel(self, label) # don't check wx.ST_NO_AUTORESIZE yet
  38         self.InheritAttributes()
  39         self.SetBestFittingSize(size)
  40
  41         self.Bind(wx.EVT_PAINT, self.OnPaint)
  42         if BUFFERED:
  43             self.defBackClr = self.GetBackgroundColour()
  44             self.Bind(wx.EVT_ERASE_BACKGROUND, self.OnEraseBackground)
  45         else:
  46             self.SetBackgroundStyle(wx.BG_STYLE_SYSTEM)
  47
  48
  49
  50     def SetLabel(self, label):
  51         """
  52         Sets the static text label and updates the control's size to exactly
  53         fit the label unless the control has wx.ST_NO_AUTORESIZE flag.
  54         """
  55         wx.PyControl.SetLabel(self, label)
  56         style = self.GetWindowStyleFlag()
  57         self.InvalidateBestSize()
  58         if not style & wx.ST_NO_AUTORESIZE:
  59             self.SetBestFittingSize(self.GetBestSize())
  60         self.Refresh()
  61
  62
  63     def SetFont(self, font):
  64         """
  65         Sets the static text font and updates the control's size to exactly
  66         fit the label unless the control has wx.ST_NO_AUTORESIZE flag.
  67         """
  68         wx.PyControl.SetFont(self, font)
  69         style = self.GetWindowStyleFlag()
  70         self.InvalidateBestSize()
  71         if not style & wx.ST_NO_AUTORESIZE:
  72             self.SetBestFittingSize(self.GetBestSize())
  73         self.Refresh()
  74
  75
  76     def DoGetBestSize(self):
  77         """
  78         Overridden base class virtual.  Determines the best size of
  79         the control based on the label size and the current font.
  80         """
  81         label = self.GetLabel()
  82         font = self.GetFont()
  83         if not font:
  84             font = wx.SystemSettings.GetFont(wx.SYS_DEFAULT_GUI_FONT)
  85         dc = wx.ClientDC(self)
  86         dc.SetFont(font)
  87
  88         maxWidth = totalHeight = 0
  89         for line in label.split('\n'):
  90             if line == '':
  91                 w, h = dc.GetTextExtent('W')  # empty lines have height too
  92             else:
  93                 w, h = dc.GetTextExtent(line)
  94             totalHeight += h
  95             maxWidth = max(maxWidth, w)
  96         best = wx.Size(maxWidth, totalHeight)
  97         self.CacheBestSize(best)
  98         return best
  99
 100
 101     def AcceptsFocus(self):
 102         """Overridden base class virtual."""
 103         return False
 104
 105
 106     def GetDefaultAttributes(self):
 107         """
 108         Overridden base class virtual.  By default we should use
 109         the same font/colour attributes as the native StaticText.
 110         """
 111         return wx.StaticText.GetClassDefaultAttributes()
 112
 113
 114     def ShouldInheritColours(self):
 115         """
 116         Overridden base class virtual.  If the parent has non-default
 117         colours then we want this control to inherit them.
 118         """
 119         return True
 120
 121
 122     def OnPaint(self, event):
 123         if BUFFERED:
 124             dc = wx.BufferedPaintDC(self)
 125         else:
 126             dc = wx.PaintDC(self)
 127         width, height = self.GetClientSize()
 128         if not width or not height:
 129             return
 130
 131         if BUFFERED:
 132             clr = self.GetBackgroundColour()
 133             backBrush = wx.Brush(clr, wx.SOLID)
 134             if wx.Platform == "__WXMAC__" and clr == self.defBackClr:
 135                 # if colour is still the default then use the striped background on Mac
 136                 backBrush.MacSetTheme(1) # 1 == kThemeBrushDialogBackgroundActive
 137             dc.SetBackground(backBrush)
 138             dc.Clear()
 139
 140         dc.SetTextForeground(self.GetForegroundColour())
 141         dc.SetFont(self.GetFont())
 142         label = self.GetLabel()
 143         style = self.GetWindowStyleFlag()
 144         x = y = 0
 145         for line in label.split('\n'):
 146             if line == '':
 147                 w, h = self.GetTextExtent('W')  # empty lines have height too
 148             else:
 149                 w, h = self.GetTextExtent(line)
 150             if style & wx.ALIGN_RIGHT:
 151                 x = width - w
 152             if style & wx.ALIGN_CENTER:
 153                 x = (width - w)/2
 154             dc.DrawText(line, x, y)
 155             y += h
 156
 157
 158     def OnEraseBackground(self, event):
 159         pass
 160
 161
 162
 163
 164 #----------------------------------------------------------------------
 165
 166