litesoft
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// This Source Code is in the Public Domain per: http://litesoft.org/License.txt package org.litesoft.GWT.client.widgets; import org.litesoft.GWT.client.*; import org.litesoft.GWT.client.widgets.nonpublic.*; import org.litesoft.core.simpletypes.*; import org.litesoft.core.util.*; import org.litesoft.uipopupsupport.*; import com.google.gwt.user.client.*; import com.google.gwt.user.client.ui.*; public abstract class AbstractContextPopup extends PopupPanel { private static final String ERROR_FROM = "AbstractContextPopup"; protected AbstractContextPopup( boolean pAutoHide ) { super( pAutoHide ); } protected AbstractContextPopup( boolean autoHide, PopupListener pListener ) { this( autoHide ); if ( pListener != null ) { addPopupListener( pListener ); } } protected void error( String pProblem, RuntimeException pRTE ) { AlertManager.alert( ERROR_FROM, "Contextual Options Error", pProblem, pRTE ); } abstract protected Widget createPopupWidget(); /** * Show the Context Popup, positioning it based on the pEvent's Client X & Y positions, and * the two provided Relative Rectangular "meeting" Points. * * @param pEvent !null - used to get the Target (Source) Element & the Mouse * location (Client X & Y) * @param pRectangleContainmentStrategy !null - Controls Popup location should any of the Popup be off screen. * @param pSourceElementRelativeMeetingPoint * if not null then indicates to use the clicked on element's * location, size, and this "point" as the "meeting" point * @param pPopupRelativeMeetingPoint the Popup's "meeting" point. null defaults to "CornerTopLeft" */ public void showContextPopup( Event pEvent, // RectangleContainmentStrategy pRectangleContainmentStrategy, CommonRectangularPoint pSourceElementRelativeMeetingPoint, CommonRectangularPoint pPopupRelativeMeetingPoint ) { Widget zWidget; try { if ( null == (zWidget = createPopupWidget()) ) { error( "No Widget", null ); return; } } catch ( RuntimeException e ) { error( e.getMessage(), e ); return; } setWidget( zWidget ); setPopupPositionAndShow( new MyPositionCallback( pRectangleContainmentStrategy, pSourceElementRelativeMeetingPoint, pEvent, (pPopupRelativeMeetingPoint != null) ? // pPopupRelativeMeetingPoint : // CommonRectangularPoint.LeftTop ) ); } @Override public void show() { super.show(); mSavedCaptureElement = DOM.getCaptureElement(); if ( mSavedCaptureElement != null ) { DOM.releaseCapture( mSavedCaptureElement ); } } private Element mSavedCaptureElement = null; @Override public void hide() { if ( mSavedCaptureElement != null ) { DOM.setCapture( mSavedCaptureElement ); mSavedCaptureElement = null; } super.hide(); } private class MyPositionCallback implements PositionCallback { private ContextPopupPositioner mPositioner; public MyPositionCallback( RectangleContainmentStrategy pRectangleContainmentStrategy, CommonRectangularPoint pSourceElementRelativeMeetingPoint, Event pEvent, CommonRectangularPoint pPopupRelativeMeetingPoint ) { SizeXY zClientSize = new SizeXY( Window.getClientWidth(), Window.getClientHeight() ); PointXY zClientPos = new PointXY( DOM.eventGetClientX( pEvent ), DOM.eventGetClientY( pEvent ) ); if ( pSourceElementRelativeMeetingPoint == null ) { mPositioner = new ContextPopupPositioner( pRectangleContainmentStrategy, pPopupRelativeMeetingPoint,// zClientPos, zClientSize ); } else { Element zTargetElement = DOM.eventGetTarget( pEvent ); int zSrcElementXpos = DOM.getAbsoluteLeft( zTargetElement ); int zSrcElementYpos = DOM.getAbsoluteTop( zTargetElement ); int zSrcElementXsize = CommonElementHelper.getOffsetWidth( zTargetElement ); int zSrcElementYsize = CommonElementHelper.getOffsetHeight( zTargetElement ); Rect zSourceElementRect = new Rect( zSrcElementXpos, zSrcElementYpos, // zSrcElementXsize, zSrcElementYsize ); mPositioner = new SourceRelativeContextPopupPositioner( pRectangleContainmentStrategy, pPopupRelativeMeetingPoint, zClientPos, zClientSize, pSourceElementRelativeMeetingPoint, zSourceElementRect ); } } @Override public String toString() { return mPositioner.toString(); } @Override public void setPosition( int pPopupXsize, int pPopupYsize ) { adjustPopup( mPositioner.determinePosition( new Rect( 0, 0, pPopupXsize, pPopupYsize ) ) ); } protected void adjustPopup( Rect pRect ) { setPopupPosition( pRect.getXpos(), pRect.getYpos() ); } } } |