Implement support for value range in wxQt wxSpinButton

Closes https://github.com/wxWidgets/wxWidgets/pull/1237

include/wx/qt/spinbutt.h

@@ -31,6 +31,7 @@ public:
 
     virtual int GetValue() const;
     virtual void SetValue(int val);
+    virtual void SetRange(int min, int max) wxOVERRIDE;
 
     virtual QWidget *GetHandle() const;
 

src/qt/spinbutt.cpp

@@ -84,6 +84,8 @@ bool wxSpinButton::Create(wxWindow *parent,
 {
     m_qtSpinBox = new wxQtSpinButton( parent, this );
 
+    m_qtSpinBox->setRange(wxSpinButtonBase::GetMin(), wxSpinButtonBase::GetMax());
+
     // Modify the size so that the text field is not visible.
     // TODO: Find out the width of the buttons i.e. take the style into account (QStyleOptionSpinBox).
     wxSize newSize( size );
@@ -92,6 +94,16 @@ bool wxSpinButton::Create(wxWindow *parent,
     return QtCreateControl( parent, id, pos, newSize, style, wxDefaultValidator, name );
 }
 
+void wxSpinButton::SetRange(int min, int max)
+{
+    wxSpinButtonBase::SetRange(min, max); // cache the values
+
+    if ( m_qtSpinBox )
+    {
+        m_qtSpinBox->setRange(min, max);
+    }
+}
+
 int wxSpinButton::GetValue() const
 {
     return m_qtSpinBox->value();