wxPython/demo/LayoutConstraints.py

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