utils/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 = """\
 118 Objects of this class can be associated with a window to define its layout constraints, with respect to siblings or its parent.
 119
 120 The class consists of the following eight constraints of class wxIndividualLayoutConstraint, some or all of which should be accessed directly to set the appropriate constraints.
 121
 122 left: represents the left hand edge of the window
 123
 124 right: represents the right hand edge of the window
 125
 126 top: represents the top edge of the window
 127
 128 bottom: represents the bottom edge of the window
 129
 130 width: represents the width of the window
 131
 132 height: represents the height of the window
 133
 134 centreX: represents the horizontal centre point of the window
 135
 136 centreY: represents the vertical centre point of the window
 137
 138 Most constraints are initially set to have the relationship wxUnconstrained, which means that their values should be calculated by looking at known constraints. The exceptions are width and height, which are set to wxAsIs to ensure that if the user does not specify a constraint, the existing width and height will be used, to be compatible with panel items which often have take a default size. If the constraint is wxAsIs, the dimension will not be changed.
 139
 140 wxLayoutConstraints()
 141 -------------------------------------------
 142
 143 Constructor.
 144 """