wxPython/wx/lib/colourselect.py

   1 #----------------------------------------------------------------------------
   2 # Name:         ColourSelect.py
   3 # Purpose:      Colour Box Selection Control
   4 #
   5 # Author:       Lorne White, Lorne.White@telusplanet.net
   6 #
   7 # Created:      Feb 25, 2001
   8 # Licence:      wxWindows license
   9 #----------------------------------------------------------------------------
  10
  11 # creates a colour wxButton with selectable color
  12 # button click provides a colour selection box
  13 # button colour will change to new colour
  14 # GetColour method to get the selected colour
  15
  16 # Updates:
  17 # call back to function if changes made
  18
  19 # Cliff Wells, logiplexsoftware@earthlink.net:
  20 # - Made ColourSelect into "is a button" rather than "has a button"
  21 # - Added label parameter and logic to adjust the label colour according to the background
  22 #   colour
  23 # - Added id argument
  24 # - Rearranged arguments to more closely follow wx conventions
  25 # - Simplified some of the code
  26
  27 # Cliff Wells, 2002/02/07
  28 # - Added ColourSelect Event
  29
  30 # 12/01/2003 - Jeff Grimmett (grimmtooth@softhome.net)
  31 #
  32 # o Updated for 2.5 compatability.
  33 #
  34
  35 #----------------------------------------------------------------------------
  36
  37 import  wx
  38
  39 #----------------------------------------------------------------------------
  40
  41 wxEVT_COMMAND_COLOURSELECT = wx.NewEventType()
  42
  43 class ColourSelectEvent(wx.PyCommandEvent):
  44     def __init__(self, id, value):
  45         wx.PyCommandEvent.__init__(self, id = id)
  46         self.SetEventType(wxEVT_COMMAND_COLOURSELECT)
  47         self.value = value
  48
  49     def GetValue(self):
  50         return self.value
  51
  52 EVT_COLOURSELECT = wx.PyEventBinder(wxEVT_COMMAND_COLOURSELECT, 1)
  53
  54 #----------------------------------------------------------------------------
  55
  56 class ColourSelect(wx.BitmapButton):
  57     def __init__(self, parent, id, label="", colour=wx.BLACK,
  58                  pos=wx.DefaultPosition, size=wx.DefaultSize,
  59                  callback=None, style=0):
  60         if label:
  61             w, h = parent.GetTextExtent(label)
  62             w += 6
  63             h += 6
  64         else:
  65             w, h = 20, 20
  66         wx.BitmapButton.__init__(self, parent, id, wx.EmptyBitmap(w,h),
  67                                  pos=pos, size=size, style=style|wx.BU_AUTODRAW)
  68
  69         if type(colour) == type( () ):
  70             colour = wx.Colour(*colour)
  71         self.colour = colour
  72         self.SetLabel(label)
  73         self.callback = callback
  74         bmp = self.MakeBitmap()
  75         self.SetBitmap(bmp)
  76         parent.Bind(wx.EVT_BUTTON, self.OnClick, self)
  77
  78
  79     def GetColour(self):
  80         return self.colour
  81
  82     def GetValue(self):
  83         return self.colour
  84
  85     def SetValue(self, colour):
  86         self.SetColour(colour)
  87
  88     def SetColour(self, colour):
  89         if type(colour) == type( () ):
  90             colour = wxColour(*colour)
  91
  92         self.colour = colour
  93         bmp = self.MakeBitmap()
  94         self.SetBitmap(bmp)
  95
  96
  97     def MakeBitmap(self):
  98         bdr = 10
  99         width, height = self.GetSize()
 100         bmp = wx.EmptyBitmap(width-bdr, height-bdr)
 101         dc = wx.MemoryDC()
 102         dc.SelectObject(bmp)
 103         dc.SetFont(self.GetFont())
 104         label = self.GetLabel()
 105         # Just make a little colored bitmap
 106         dc.SetBackground(wx.Brush(self.colour))
 107         dc.Clear()
 108
 109         if label:
 110             # Add a label to it
 111             avg = reduce(lambda a, b: a + b, self.colour.Get()) / 3
 112             fcolour = avg > 128 and wx.BLACK or wx.WHITE
 113             dc.SetTextForeground(fcolour)
 114             dc.DrawLabel(label, (0,0, width-bdr, height-bdr),
 115                          wx.ALIGN_CENTER)
 116
 117         dc.SelectObject(wx.NullBitmap)
 118         return bmp
 119
 120
 121     def SetBitmap(self, bmp):
 122         self.SetBitmapLabel(bmp)
 123         self.SetBitmapSelected(bmp)
 124         self.SetBitmapDisabled(bmp)
 125         self.SetBitmapFocus(bmp)
 126         self.SetBitmapSelected(bmp)
 127
 128
 129     def OnChange(self):
 130         wx.PostEvent(self, ColourSelectEvent(self.GetId(), self.GetValue()))
 131         if self.callback is not None:
 132             self.callback()
 133
 134     def OnClick(self, event):
 135         data = wx.ColourData()
 136         data.SetChooseFull(True)
 137         data.SetColour(self.colour)
 138         dlg = wx.ColourDialog(self.GetParent(), data)
 139         changed = dlg.ShowModal() == wx.ID_OK
 140
 141         if changed:
 142             data = dlg.GetColourData()
 143             self.SetColour(data.GetColour())
 144
 145         dlg.Destroy()
 146
 147         # moved after dlg.Destroy, since who knows what the callback will do...
 148         if changed:
 149             self.OnChange()
 150