+#define wxTYPE_SIZER 90
+
+// =============================================================================
+// classes
+// =============================================================================
+
+// ----------------------------------------------------------------------------
+// wxIndividualLayoutConstraint: a constraint on window position
+// ----------------------------------------------------------------------------
+
+class WXDLLEXPORT wxIndividualLayoutConstraint : public wxObject
+{
+ DECLARE_DYNAMIC_CLASS(wxIndividualLayoutConstraint)
+
+protected:
+ // To be allowed to modify the internal variables
+ friend class wxIndividualLayoutConstraint_Serialize;
+
+ // 'This' window is the parent or sibling of otherWin
+ wxWindowBase *otherWin;
+
+ wxEdge myEdge;
+ wxRelationship relationship;
+ int margin;
+ int value;
+ int percent;
+ wxEdge otherEdge;
+ bool done;
+
+public:
+ wxIndividualLayoutConstraint();
+ ~wxIndividualLayoutConstraint();
+
+ void Set(wxRelationship rel, wxWindowBase *otherW, wxEdge otherE, int val = 0, int marg = wxLAYOUT_DEFAULT_MARGIN);
+
+ //
+ // Sibling relationships
+ //
+ void LeftOf(wxWindowBase *sibling, int marg = wxLAYOUT_DEFAULT_MARGIN);
+ void RightOf(wxWindowBase *sibling, int marg = wxLAYOUT_DEFAULT_MARGIN);
+ void Above(wxWindowBase *sibling, int marg = wxLAYOUT_DEFAULT_MARGIN);
+ void Below(wxWindowBase *sibling, int marg = wxLAYOUT_DEFAULT_MARGIN);
+
+ //
+ // 'Same edge' alignment
+ //
+ void SameAs(wxWindowBase *otherW, wxEdge edge, int marg = wxLAYOUT_DEFAULT_MARGIN);
+
+ // The edge is a percentage of the other window's edge
+ void PercentOf(wxWindowBase *otherW, wxEdge wh, int per);
+
+ //
+ // Edge has absolute value
+ //
+ void Absolute(int val);
+
+ //
+ // Dimension is unconstrained
+ //
+ void Unconstrained() { relationship = wxUnconstrained; }
+
+ //
+ // Dimension is 'as is' (use current size settings)
+ //
+ void AsIs() { relationship = wxAsIs; }
+
+ //
+ // Accessors
+ //
+ wxWindowBase *GetOtherWindow() { return otherWin; }
+ wxEdge GetMyEdge() const { return myEdge; }
+ void SetEdge(wxEdge which) { myEdge = which; }
+ void SetValue(int v) { value = v; }
+ int GetMargin() { return margin; }
+ void SetMargin(int m) { margin = m; }
+ int GetValue() const { return value; }
+ int GetPercent() const { return percent; }
+ int GetOtherEdge() const { return otherEdge; }
+ bool GetDone() const { return done; }
+ void SetDone(bool d) { done = d; }
+ wxRelationship GetRelationship() { return relationship; }
+ void SetRelationship(wxRelationship r) { relationship = r; }
+
+ // Reset constraint if it mentions otherWin
+ bool ResetIfWin(wxWindowBase *otherW);
+
+ // Try to satisfy constraint
+ bool SatisfyConstraint(wxLayoutConstraints *constraints, wxWindowBase *win);
+
+ // Get the value of this edge or dimension, or if this
+ // is not determinable, -1.
+ int GetEdge(wxEdge which, wxWindowBase *thisWin, wxWindowBase *other) const;
+};
+
+// ----------------------------------------------------------------------------
+// wxLayoutConstraints: the complete set of constraints for a window
+// ----------------------------------------------------------------------------
+
+class WXDLLEXPORT wxLayoutConstraints : public wxObject
+{
+ DECLARE_DYNAMIC_CLASS(wxLayoutConstraints)
+
+public:
+ // Edge constraints
+ wxIndividualLayoutConstraint left;
+ wxIndividualLayoutConstraint top;
+ wxIndividualLayoutConstraint right;
+ wxIndividualLayoutConstraint bottom;
+ // Size constraints
+ wxIndividualLayoutConstraint width;
+ wxIndividualLayoutConstraint height;
+ // Centre constraints
+ wxIndividualLayoutConstraint centreX;
+ wxIndividualLayoutConstraint centreY;
+
+ wxLayoutConstraints();
+ ~wxLayoutConstraints();
+
+ bool SatisfyConstraints(wxWindowBase *win, int *noChanges);
+ bool AreSatisfied() const
+ {
+ return left.GetDone() && top.GetDone() && right.GetDone() &&
+ bottom.GetDone() && centreX.GetDone() && centreY.GetDone();
+ }
+};
+
+// ----------------------------------------------------------------------------
+// sizers
+// ----------------------------------------------------------------------------