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@@ -23,54 +23,46 @@ |
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* Converts {@link MouseEvent}s to {@link DragEvent}s and delegates to the |
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* specified {@link DragGesture}. |
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*/ |
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public class MouseDragHandler extends MouseHandlerAdaptor |
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{ |
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public class MouseDragHandler extends MouseHandlerAdaptor { |
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private static MouseDragHandlerImpl s_Impl = (MouseDragHandlerImpl) GWT.create( MouseDragHandlerImpl.class ); |
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private DragGesture m_dragGesture; |
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private MouseEvent m_mouseDown = null; |
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private MouseEvent m_previousEvent = null; |
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public MouseDragHandler( DragGesture dragGesture ) |
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{ |
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public MouseDragHandler( DragGesture dragGesture ) { |
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super( Event.ONMOUSEDOWN | Event.ONMOUSEMOVE | Event.ONMOUSEUP ); |
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m_dragGesture = dragGesture; |
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} |
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protected MouseEvent getMouseDown() |
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{ |
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protected MouseEvent getMouseDown() { |
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return m_mouseDown; |
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} |
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protected MouseEvent getPreviousEvent() |
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{ |
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protected MouseEvent getPreviousEvent() { |
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return m_previousEvent; |
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} |
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/** |
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* Get the delegate object which will handle drag operations. |
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*/ |
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public DragGesture getDragGesture() |
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{ |
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public DragGesture getDragGesture() { |
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return m_dragGesture; |
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} |
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/** |
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* Set the delegate object which will handle drag operations. |
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*/ |
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public void setDragGesture( DragGesture dragGesture ) |
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{ |
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public void setDragGesture( DragGesture dragGesture ) { |
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m_dragGesture = dragGesture; |
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} |
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@Override |
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public void onMouseDown( MouseEvent e ) |
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{ |
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public void onMouseDown( MouseEvent e ) { |
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DOM.eventCancelBubble( e.getDomEvent(), true ); |
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s_Impl.onMouseDown( e.getDomEvent() ); |
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if ( m_dragGesture != null ) |
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{ |
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if ( m_dragGesture != null ) { |
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m_mouseDown = e; |
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m_dragGesture.start( e ); |
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m_previousEvent = e; |
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@@ -78,48 +70,39 @@ |
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} |
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@Override |
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public void onMouseMove( MouseEvent e ) |
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{ |
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if ( m_mouseDown != null ) |
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{ |
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public void onMouseMove( MouseEvent e ) { |
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if ( m_mouseDown != null ) { |
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m_dragGesture.step( new DragEvent( e, m_mouseDown, m_previousEvent ) ); |
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m_previousEvent = e; |
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} |
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} |
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@Override |
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public void onMouseUp( MouseEvent e ) |
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{ |
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public void onMouseUp( MouseEvent e ) { |
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// it is possible to get a mouse up without a mouse down |
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if ( m_mouseDown != null ) |
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{ |
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if ( m_mouseDown != null ) { |
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// clear MD first to prevent reentrancy |
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m_mouseDown = null; |
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m_dragGesture.finish(); |
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m_previousEvent = null; |
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} |
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if ( e != null ) |
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{ |
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if ( e != null ) { |
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s_Impl.onMouseUp( e.getDomEvent() ); |
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} |
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} |
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protected static class MouseDragHandlerImpl |
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{ |
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public void onMouseDown( Event event ) |
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{ |
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protected static class MouseDragHandlerImpl { |
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public void onMouseDown( Event event ) { |
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// prevents text selection and image dragging in Mozilla, Safari & Opera |
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DOM.eventPreventDefault( event ); |
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} |
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public void onMouseUp( Event event ) |
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{ |
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public void onMouseUp( Event event ) { |
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} |
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} |
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protected static class MouseDragHandlerImplIE6 extends MouseDragHandlerImpl |
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{ |
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protected static class MouseDragHandlerImplIE6 extends MouseDragHandlerImpl { |
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@Override |
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public native void onMouseDown( Event event ) /*-{ |
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$doc.body.onselectstart = function () |