wxPython/demo/LayoutConstraints.py

   1 # 11/19/2003 - Jeff Grimmett (grimmtooth@softhome.net)
   2 #
   3 # o Updated for wx namespace
   4 #
   5
   6 import  wx
   7
   8 #---------------------------------------------------------------------------
   9
  10 class TestLayoutConstraints(wx.Panel):
  11     def __init__(self, parent):
  12         wx.Panel.__init__(self, parent, -1)
  13         self.SetAutoLayout(True)
  14         self.Bind(wx.EVT_BUTTON, self.OnButton, id=100)
  15
  16         self.SetBackgroundColour(wx.NamedColour("MEDIUM ORCHID"))
  17
  18         self.panelA = wx.Window(self, -1, style=wx.SIMPLE_BORDER)
  19         self.panelA.SetBackgroundColour(wx.BLUE)
  20
  21         txt = wx.StaticText(
  22                     self.panelA, -1,
  23                     "Resize the window and see\n"
  24                     "what happens...  Notice that\n"
  25                     "there is no OnSize handler.",
  26                     (5,5), (-1, 50)
  27                     )
  28
  29         txt.SetBackgroundColour(wx.BLUE)
  30         txt.SetForegroundColour(wx.WHITE)
  31
  32         lc = wx.LayoutConstraints()
  33         lc.top.SameAs(self, wx.Top, 10)
  34         lc.left.SameAs(self, wx.Left, 10)
  35         lc.bottom.SameAs(self, wx.Bottom, 10)
  36         lc.right.PercentOf(self, wx.Right, 50)
  37         self.panelA.SetConstraints(lc)
  38
  39         self.panelB = wx.Window(self, -1, style=wx.SIMPLE_BORDER)
  40         self.panelB.SetBackgroundColour(wx.RED)
  41         lc = wx.LayoutConstraints()
  42         lc.top.SameAs(self, wx.Top, 10)
  43         lc.right.SameAs(self, wx.Right, 10)
  44         lc.bottom.PercentOf(self, wx.Bottom, 30)
  45         lc.left.RightOf(self.panelA, 10)
  46         self.panelB.SetConstraints(lc)
  47
  48         self.panelC = wx.Window(self, -1, style=wx.SIMPLE_BORDER)
  49         self.panelC.SetBackgroundColour(wx.WHITE)
  50         lc = wx.LayoutConstraints()
  51         lc.top.Below(self.panelB, 10)
  52         lc.right.SameAs(self, wx.Right, 10)
  53         lc.bottom.SameAs(self, wx.Bottom, 10)
  54         lc.left.RightOf(self.panelA, 10)
  55         self.panelC.SetConstraints(lc)
  56
  57         b = wx.Button(self.panelA, 100, ' Panel A ')
  58         lc = wx.LayoutConstraints()
  59         lc.centreX.SameAs   (self.panelA, wx.CentreX)
  60         lc.centreY.SameAs   (self.panelA, wx.CentreY)
  61         lc.height.AsIs      ()
  62         lc.width.PercentOf  (self.panelA, wx.Width, 50)
  63         b.SetConstraints(lc);
  64
  65         b = wx.Button(self.panelB, 100, ' Panel B ')
  66         lc = wx.LayoutConstraints()
  67         lc.top.SameAs       (self.panelB, wx.Top, 2)
  68         lc.right.SameAs     (self.panelB, wx.Right, 4)
  69         lc.height.AsIs      ()
  70         lc.width.AsIs       ()
  71         b.SetConstraints(lc);
  72
  73         self.panelD = wx.Window(self.panelC, -1, style=wx.SIMPLE_BORDER)
  74         self.panelD.SetBackgroundColour(wx.GREEN)
  75         wx.StaticText(
  76             self.panelD, -1, "Panel D", (4, 4)
  77             ).SetBackgroundColour(wx.GREEN)
  78
  79         b = wx.Button(self.panelC, 100, ' Panel C ')
  80         lc = wx.LayoutConstraints()
  81         lc.top.Below        (self.panelD)
  82         lc.left.RightOf     (self.panelD)
  83         lc.height.AsIs      ()
  84         lc.width.AsIs       ()
  85         b.SetConstraints(lc);
  86
  87         lc = wx.LayoutConstraints()
  88         lc.bottom.PercentOf (self.panelC, wx.Height, 50)
  89         lc.right.PercentOf  (self.panelC, wx.Width, 50)
  90         lc.height.SameAs    (b, wx.Height)
  91         lc.width.SameAs     (b, wx.Width)
  92         self.panelD.SetConstraints(lc);
  93
  94
  95     def OnButton(self, event):
  96         wx.Bell()
  97
  98
  99 #---------------------------------------------------------------------------
 100
 101 def runTest(frame, nb, log):
 102     win = TestLayoutConstraints(nb)
 103     return win
 104
 105 #---------------------------------------------------------------------------
 106
 107
 108
 109 overview = """\
 110 <html><body>
 111 Objects of this class can be associated with a window to define its
 112 layout constraints, with respect to siblings or its parent.
 113
 114 <p>The class consists of the following eight constraints of class
 115 wxIndividualLayoutConstraint, some or all of which should be accessed
 116 directly to set the appropriate constraints.
 117
 118 <p><ul>
 119 <li>left: represents the left hand edge of the window
 120
 121 <li>right: represents the right hand edge of the window
 122
 123 <li>top: represents the top edge of the window
 124
 125 <li>bottom: represents the bottom edge of the window
 126
 127 <li>width: represents the width of the window
 128
 129 <li>height: represents the height of the window
 130
 131 <li>centreX: represents the horizontal centre point of the window
 132
 133 <li>centreY: represents the vertical centre point of the window
 134 </ul>
 135 <p>Most constraints are initially set to have the relationship
 136 wxUnconstrained, which means that their values should be calculated by
 137 looking at known constraints. The exceptions are width and height,
 138 which are set to wxAsIs to ensure that if the user does not specify a
 139 constraint, the existing width and height will be used, to be
 140 compatible with panel items which often have take a default size. If
 141 the constraint is wxAsIs, the dimension will not be changed.
 142
 143 """
 144
 145
 146
 147
 148 if __name__ == '__main__':
 149     import sys,os
 150     import run
 151     run.main(['', os.path.basename(sys.argv[0])])
 152