wxPython/demo/wxLayoutConstraints.py

   1
   2 from wxPython.wx import *
   3
   4 #---------------------------------------------------------------------------
   5
   6 class TestLayoutConstraints(wxPanel):
   7     def __init__(self, parent):
   8         wxPanel.__init__(self, parent, -1)
   9         self.SetAutoLayout(True)
  10         EVT_BUTTON(self, 100, self.OnButton)
  11
  12         self.SetBackgroundColour(wxNamedColour("MEDIUM ORCHID"))
  13
  14         self.panelA = wxWindow(self, -1, wxDefaultPosition, wxDefaultSize,
  15                                wxSIMPLE_BORDER)
  16         self.panelA.SetBackgroundColour(wxBLUE)
  17         txt = wxStaticText(self.panelA, -1,
  18                            "Resize the window and see\n"
  19                            "what happens...  Notice that\n"
  20                            "there is no OnSize handler.",
  21                            wxPoint(5,5), wxSize(-1, 50))
  22         txt.SetBackgroundColour(wxBLUE)
  23         txt.SetForegroundColour(wxWHITE)
  24
  25         lc = wxLayoutConstraints()
  26         lc.top.SameAs(self, wxTop, 10)
  27         lc.left.SameAs(self, wxLeft, 10)
  28         lc.bottom.SameAs(self, wxBottom, 10)
  29         lc.right.PercentOf(self, wxRight, 50)
  30         self.panelA.SetConstraints(lc)
  31
  32         self.panelB = wxWindow(self, -1, wxDefaultPosition, wxDefaultSize,
  33                                wxSIMPLE_BORDER)
  34         self.panelB.SetBackgroundColour(wxRED)
  35         lc = wxLayoutConstraints()
  36         lc.top.SameAs(self, wxTop, 10)
  37         lc.right.SameAs(self, wxRight, 10)
  38         lc.bottom.PercentOf(self, wxBottom, 30)
  39         lc.left.RightOf(self.panelA, 10)
  40         self.panelB.SetConstraints(lc)
  41
  42         self.panelC = wxWindow(self, -1, wxDefaultPosition, wxDefaultSize,
  43                                wxSIMPLE_BORDER)
  44         self.panelC.SetBackgroundColour(wxWHITE)
  45         lc = wxLayoutConstraints()
  46         lc.top.Below(self.panelB, 10)
  47         lc.right.SameAs(self, wxRight, 10)
  48         lc.bottom.SameAs(self, wxBottom, 10)
  49         lc.left.RightOf(self.panelA, 10)
  50         self.panelC.SetConstraints(lc)
  51
  52         b = wxButton(self.panelA, 100, ' Panel A ')
  53         lc = wxLayoutConstraints()
  54         lc.centreX.SameAs   (self.panelA, wxCentreX)
  55         lc.centreY.SameAs   (self.panelA, wxCentreY)
  56         lc.height.AsIs      ()
  57         lc.width.PercentOf  (self.panelA, wxWidth, 50)
  58         b.SetConstraints(lc);
  59
  60         b = wxButton(self.panelB, 100, ' Panel B ')
  61         lc = wxLayoutConstraints()
  62         lc.top.SameAs       (self.panelB, wxTop, 2)
  63         lc.right.SameAs     (self.panelB, wxRight, 4)
  64         lc.height.AsIs      ()
  65         lc.width.AsIs       ()
  66         b.SetConstraints(lc);
  67
  68         self.panelD = wxWindow(self.panelC, -1, wxDefaultPosition, wxDefaultSize,
  69                             wxSIMPLE_BORDER)
  70         self.panelD.SetBackgroundColour(wxGREEN)
  71         wxStaticText(self.panelD, -1, "Panel D", wxPoint(4, 4)).SetBackgroundColour(wxGREEN)
  72
  73         b = wxButton(self.panelC, 100, ' Panel C ')
  74         lc = wxLayoutConstraints()
  75         lc.top.Below        (self.panelD)
  76         lc.left.RightOf     (self.panelD)
  77         lc.height.AsIs      ()
  78         lc.width.AsIs       ()
  79         b.SetConstraints(lc);
  80
  81         lc = wxLayoutConstraints()
  82         lc.bottom.PercentOf (self.panelC, wxHeight, 50)
  83         lc.right.PercentOf  (self.panelC, wxWidth, 50)
  84         lc.height.SameAs    (b, wxHeight)
  85         lc.width.SameAs     (b, wxWidth)
  86         self.panelD.SetConstraints(lc);
  87
  88
  89
  90
  91     def OnButton(self, event):
  92         wxBell()
  93
  94
  95 #---------------------------------------------------------------------------
  96
  97 def runTest(frame, nb, log):
  98     win = TestLayoutConstraints(nb)
  99     return win
 100
 101 #---------------------------------------------------------------------------
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 116
 117 overview = """\<html><body>
 118 Objects of this class can be associated with a window to define its
 119 layout constraints, with respect to siblings or its parent.
 120
 121 The class consists of the following eight constraints of class
 122 wxIndividualLayoutConstraint, some or all of which should be accessed
 123 directly to set the appropriate constraints.
 124
 125 left: represents the left hand edge of the window
 126
 127 right: represents the right hand edge of the window
 128
 129 top: represents the top edge of the window
 130
 131 bottom: represents the bottom edge of the window
 132
 133 width: represents the width of the window
 134
 135 height: represents the height of the window
 136
 137 centreX: represents the horizontal centre point of the window
 138
 139 centreY: represents the vertical centre point of the window
 140
 141 Most constraints are initially set to have the relationship
 142 wxUnconstrained, which means that their values should be calculated by
 143 looking at known constraints. The exceptions are width and height,
 144 which are set to wxAsIs to ensure that if the user does not specify a
 145 constraint, the existing width and height will be used, to be
 146 compatible with panel items which often have take a default size. If
 147 the constraint is wxAsIs, the dimension will not be changed.
 148
 149 """
 150
 151
 152
 153
 154 if __name__ == '__main__':
 155     import sys,os
 156     import run
 157     run.main(['', os.path.basename(sys.argv[0])])
 158