+#ifdef __WXMSW__
+ #define IS_MOTION_SPIN_SUPPORTED 1
+#else
+ #define IS_MOTION_SPIN_SUPPORTED 0
+#endif
+
+#if IS_MOTION_SPIN_SUPPORTED
+
+//
+// This class implements ability to rapidly change "spin" value
+// by moving mouse when one of the spin buttons is depressed.
+class wxPGSpinButton : public wxSpinButton
+{
+public:
+ wxPGSpinButton() : wxSpinButton()
+ {
+ m_bLeftDown = false;
+ m_hasCapture = false;
+ m_spins = 1;
+
+ Connect( wxEVT_LEFT_DOWN,
+ wxMouseEventHandler(wxPGSpinButton::OnMouseEvent) );
+ Connect( wxEVT_LEFT_UP,
+ wxMouseEventHandler(wxPGSpinButton::OnMouseEvent) );
+ Connect( wxEVT_MOTION,
+ wxMouseEventHandler(wxPGSpinButton::OnMouseEvent) );
+ Connect( wxEVT_MOUSE_CAPTURE_LOST,
+ wxMouseCaptureLostEventHandler(wxPGSpinButton::OnMouseCaptureLost) );
+ }
+
+ int GetSpins() const
+ {
+ return m_spins;
+ }
+
+private:
+ wxPoint m_ptPosition;
+
+ // Having a separate spins variable allows us to handle validation etc. for
+ // multiple spin events at once (with quick mouse movements there could be
+ // hundreds of 'spins' being done at once). Technically things like this
+ // should be stored in event (wxSpinEvent in this case), but there probably
+ // isn't anything there that can be reliably reused.
+ int m_spins;
+
+ bool m_bLeftDown;
+
+ // SpinButton seems to be a special for mouse capture, so we may need track
+ // privately whether mouse is actually captured.
+ bool m_hasCapture;
+
+ void Capture()
+ {
+ if ( !m_hasCapture )
+ {
+ CaptureMouse();
+ m_hasCapture = true;
+ }
+
+ SetCursor(wxCURSOR_SIZENS);
+ }
+ void Release()
+ {
+ m_bLeftDown = false;
+
+ if ( m_hasCapture )
+ {
+ ReleaseMouse();
+ m_hasCapture = false;
+ }
+
+ wxWindow *parent = GetParent();
+ if ( parent )
+ SetCursor(parent->GetCursor());
+ else
+ SetCursor(wxNullCursor);
+ }
+
+ void OnMouseEvent(wxMouseEvent& event)
+ {
+ if ( event.GetEventType() == wxEVT_LEFT_DOWN )
+ {
+ m_bLeftDown = true;
+ m_ptPosition = event.GetPosition();
+ }
+ else if ( event.GetEventType() == wxEVT_LEFT_UP )
+ {
+ Release();
+ m_bLeftDown = false;
+ }
+ else if ( event.GetEventType() == wxEVT_MOTION )
+ {
+ if ( m_bLeftDown )
+ {
+ int dy = m_ptPosition.y - event.GetPosition().y;
+ if ( dy )
+ {
+ Capture();
+ m_ptPosition = event.GetPosition();
+
+ wxSpinEvent evtscroll( (dy >= 0) ? wxEVT_SCROLL_LINEUP :
+ wxEVT_SCROLL_LINEDOWN,
+ GetId() );
+ evtscroll.SetEventObject(this);
+
+ wxASSERT( m_spins == 1 );
+
+ m_spins = abs(dy);
+ GetEventHandler()->ProcessEvent(evtscroll);
+ m_spins = 1;
+ }
+ }
+ }
+
+ event.Skip();
+ }
+ void OnMouseCaptureLost(wxMouseCaptureLostEvent& WXUNUSED(event))
+ {
+ Release();
+ }
+};
+
+#endif // IS_MOTION_SPIN_SUPPORTED
+
+
projects / wxWidgets.git / blobdiff