Make wxSpinCtrl::GetTextValue() pure virtual
It is now implemented in all ports.
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@@ -35,7 +35,7 @@ public:
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wxSpinCtrlBase() {}
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wxSpinCtrlBase() {}
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// accessor functions that derived classes are expected to have
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// accessor functions that derived classes are expected to have
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virtual wxString GetTextValue() const { return wxString(); }
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virtual wxString GetTextValue() const = 0;
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// T GetValue() const
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// T GetValue() const
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// T GetMin() const
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// T GetMin() const
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// T GetMax() const
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// T GetMax() const
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