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/*******************************************************************************
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* Copyright (c) 2000, 2010 IBM Corporation and others.
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* All rights reserved. This program and the accompanying materials
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* are made available under the terms of the Eclipse Public License v1.0
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* which accompanies this distribution, and is available at
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* http://www.eclipse.org/legal/epl-v10.html
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*
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* Contributors:
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* IBM Corporation - initial API and implementation
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*******************************************************************************/
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package org.eclipse.draw2d;
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import org.eclipse.draw2d.rap.swt.SWT;
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import org.eclipse.swt.accessibility.AccessibleControlEvent;
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import org.eclipse.swt.accessibility.AccessibleControlListener;
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import org.eclipse.swt.accessibility.AccessibleEvent;
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import org.eclipse.swt.accessibility.AccessibleListener;
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import org.eclipse.swt.events.DisposeEvent;
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import org.eclipse.swt.events.TraverseEvent;
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import org.eclipse.swt.graphics.Cursor;
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import org.eclipse.swt.widgets.Control;
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/**
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* The SWTEventDispatcher provides draw2d with the ability to dispatch SWT
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* Events. The {@link org.eclipse.draw2d.LightweightSystem} adds SWT event
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* listeners on its Canvas. When the Canvas receives an SWT event, it calls the
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* appropriate dispatcher method in SWTEventDispatcher.
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*/
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public class SWTEventDispatcher extends EventDispatcher {
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/**
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* Used to tell if any button is pressed without regard to the specific
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* button.
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*
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* @deprecated Use {@link SWT#BUTTON_MASK} instead.
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*/
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protected static final int ANY_BUTTON = SWT.BUTTON_MASK;
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private boolean figureTraverse = true;
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private boolean captured;
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private IFigure root;
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private IFigure mouseTarget;
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private IFigure cursorTarget;
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private IFigure focusOwner;
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private IFigure hoverSource;
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private MouseEvent currentEvent;
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private Cursor cursor;
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/** The control this dispatcher is listening to. */
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protected org.eclipse.swt.widgets.Control control;
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private ToolTipHelper toolTipHelper;
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private FocusTraverseManager focusManager = new FocusTraverseManager();
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/**
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* Implements {@link EventDispatcher.AccessibilityDispatcher} but does
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* nothing in the implementation.
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*/
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protected class FigureAccessibilityDispatcher extends
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AccessibilityDispatcher {
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/** @see AccessibleControlListener#getChildAtPoint(AccessibleControlEvent) */
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public void getChildAtPoint(AccessibleControlEvent e) {
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}
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/** @see AccessibleControlListener#getChildCount(AccessibleControlEvent) */
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public void getChildCount(AccessibleControlEvent e) {
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}
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/** @see AccessibleControlListener#getChildren(AccessibleControlEvent) */
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public void getChildren(AccessibleControlEvent e) {
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}
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/** @see AccessibleControlListener#getDefaultAction(AccessibleControlEvent) */
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public void getDefaultAction(AccessibleControlEvent e) {
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}
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/** @see AccessibleListener#getDescription(AccessibleEvent) */
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public void getDescription(AccessibleEvent e) {
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}
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/** @see AccessibleControlListener#getFocus(AccessibleControlEvent) */
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public void getFocus(AccessibleControlEvent e) {
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}
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/** @see AccessibleListener#getHelp(AccessibleEvent) */
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public void getHelp(AccessibleEvent e) {
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}
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/** @see AccessibleListener#getKeyboardShortcut(AccessibleEvent) */
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public void getKeyboardShortcut(AccessibleEvent e) {
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}
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/** @see AccessibleControlListener#getLocation(AccessibleControlEvent) */
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public void getLocation(AccessibleControlEvent e) {
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}
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/** @see AccessibleListener#getName(AccessibleEvent) */
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public void getName(AccessibleEvent e) {
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}
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/** @see AccessibleControlListener#getRole(AccessibleControlEvent) */
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public void getRole(AccessibleControlEvent e) {
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}
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/** @see AccessibleControlListener#getSelection(AccessibleControlEvent) */
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public void getSelection(AccessibleControlEvent e) {
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}
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/** @see AccessibleControlListener#getState(AccessibleControlEvent) */
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public void getState(AccessibleControlEvent e) {
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}
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/** @see AccessibleControlListener#getValue(AccessibleControlEvent) */
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public void getValue(AccessibleControlEvent e) {
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}
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}
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/**
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* @see EventDispatcher#dispatchFocusGained(org.eclipse.swt.events.FocusEvent)
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*/
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public void dispatchFocusGained(org.eclipse.swt.events.FocusEvent e) {
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IFigure currentFocusOwner = getFocusTraverseManager()
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.getCurrentFocusOwner();
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/*
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* Upon focus gained, if there is no current focus owner, set focus on
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* first focusable child.
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*/
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if (currentFocusOwner == null)
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currentFocusOwner = getFocusTraverseManager()
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.getNextFocusableFigure(root, focusOwner);
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setFocus(currentFocusOwner);
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}
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/**
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* @see EventDispatcher#dispatchFocusLost(org.eclipse.swt.events.FocusEvent)
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*/
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public void dispatchFocusLost(org.eclipse.swt.events.FocusEvent e) {
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setFocus(null);
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}
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/**
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* @see EventDispatcher#dispatchKeyPressed(org.eclipse.swt.events.KeyEvent)
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*/
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public void dispatchKeyPressed(org.eclipse.swt.events.KeyEvent e) {
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if (focusOwner != null) {
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KeyEvent event = new KeyEvent(this, focusOwner, e);
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focusOwner.handleKeyPressed(event);
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}
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}
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/**
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* @see EventDispatcher#dispatchKeyReleased(org.eclipse.swt.events.KeyEvent)
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*/
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public void dispatchKeyReleased(org.eclipse.swt.events.KeyEvent e) {
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if (focusOwner != null) {
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KeyEvent event = new KeyEvent(this, focusOwner, e);
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focusOwner.handleKeyReleased(event);
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}
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}
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/**
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* @see EventDispatcher#dispatchKeyTraversed(TraverseEvent)
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*/
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public void dispatchKeyTraversed(TraverseEvent e) {
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if (!figureTraverse)
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return;
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IFigure nextFigure = null;
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if (e.detail == SWT.TRAVERSE_TAB_NEXT)
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nextFigure = getFocusTraverseManager().getNextFocusableFigure(root,
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focusOwner);
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else if (e.detail == SWT.TRAVERSE_TAB_PREVIOUS)
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nextFigure = getFocusTraverseManager().getPreviousFocusableFigure(
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root, focusOwner);
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if (nextFigure != null) {
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e.doit = false;
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setFocus(nextFigure);
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}
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}
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/**
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* @see EventDispatcher#dispatchMouseHover(org.eclipse.swt.events.MouseEvent)
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*/
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public void dispatchMouseHover(org.eclipse.swt.events.MouseEvent me) {
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receive(me);
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if (mouseTarget != null)
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mouseTarget.handleMouseHover(currentEvent);
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/*
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* Check Tooltip source. Get Tooltip source's Figure. Set that tooltip
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* as the lws contents on the helper.
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*/
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if (hoverSource != null) {
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toolTipHelper = getToolTipHelper();
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IFigure tip = hoverSource.getToolTip();
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Control control = (Control) me.getSource();
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org.eclipse.swt.graphics.Point absolute;
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absolute = control.toDisplay(new org.eclipse.swt.graphics.Point(
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me.x, me.y));
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toolTipHelper.displayToolTipNear(hoverSource, tip, absolute.x,
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absolute.y);
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}
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}
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/**
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* @see EventDispatcher#dispatchMouseDoubleClicked(org.eclipse.swt.events.MouseEvent)
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*/
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public void dispatchMouseDoubleClicked(org.eclipse.swt.events.MouseEvent me) {
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receive(me);
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if (mouseTarget != null)
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mouseTarget.handleMouseDoubleClicked(currentEvent);
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}
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/**
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* @see EventDispatcher#dispatchMouseEntered(org.eclipse.swt.events.MouseEvent)
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*/
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public void dispatchMouseEntered(org.eclipse.swt.events.MouseEvent me) {
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receive(me);
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}
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/**
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* @see EventDispatcher#dispatchMouseExited(org.eclipse.swt.events.MouseEvent)
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*/
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public void dispatchMouseExited(org.eclipse.swt.events.MouseEvent me) {
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setHoverSource(null, me);
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if (mouseTarget != null) {
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currentEvent = new MouseEvent(me.x, me.y, this, mouseTarget,
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me.button, me.stateMask);
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mouseTarget.handleMouseExited(currentEvent);
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releaseCapture();
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mouseTarget = null;
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}
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}
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/**
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* @see EventDispatcher#dispatchMousePressed(org.eclipse.swt.events.MouseEvent)
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*/
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public void dispatchMousePressed(org.eclipse.swt.events.MouseEvent me) {
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receive(me);
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if (mouseTarget != null) {
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mouseTarget.handleMousePressed(currentEvent);
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if (currentEvent.isConsumed())
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setCapture(mouseTarget);
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}
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}
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/**
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* @see EventDispatcher#dispatchMouseMoved(org.eclipse.swt.events.MouseEvent)
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*/
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public void dispatchMouseMoved(org.eclipse.swt.events.MouseEvent me) {
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receive(me);
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if (mouseTarget != null) {
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if ((me.stateMask & SWT.BUTTON_MASK) != 0)
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mouseTarget.handleMouseDragged(currentEvent);
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else
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mouseTarget.handleMouseMoved(currentEvent);
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}
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}
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/**
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* @see EventDispatcher#dispatchMouseReleased(org.eclipse.swt.events.MouseEvent)
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*/
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public void dispatchMouseReleased(org.eclipse.swt.events.MouseEvent me) {
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receive(me);
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if (mouseTarget != null) {
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mouseTarget.handleMouseReleased(currentEvent);
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}
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releaseCapture();
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receive(me);
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}
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/**
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* @see EventDispatcher#getAccessibilityDispatcher()
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*/
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protected AccessibilityDispatcher getAccessibilityDispatcher() {
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return null;
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}
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/**
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* Returns the current mouse event.
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*
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* @return the current mouse event; can be <code>null</code>
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*/
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protected MouseEvent getCurrentEvent() {
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return currentEvent;
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}
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private IFigure getCurrentToolTip() {
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if (hoverSource != null)
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return hoverSource.getToolTip();
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else
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return null;
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}
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/**
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* Returns the figure that the cursor is over.
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*
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* @return the cursor target
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*/
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protected IFigure getCursorTarget() {
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return cursorTarget;
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}
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/**
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* Returns the ToolTipHelper used to display tooltips on hover events.
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*
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* @return the ToolTipHelper
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*/
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protected ToolTipHelper getToolTipHelper() {
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if (toolTipHelper == null)
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toolTipHelper = new ToolTipHelper(control);
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return toolTipHelper;
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}
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/**
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* Returns the FocusTraverseManager which is used to determine which figure
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* will get focus when a TAB or ALT+TAB key sequence occurs.
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*
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* @return the FocusTraverseManager
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*/
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protected final FocusTraverseManager getFocusTraverseManager() {
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if (focusManager == null) {
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focusManager = new FocusTraverseManager();
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}
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return focusManager;
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}
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/**
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* @see EventDispatcher#getFocusOwner()
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* @since 3.6
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*/
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public IFigure getFocusOwner() {
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return focusOwner;
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}
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/**
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* Returns the figure that is the target of mouse events. This may not be
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* the figure beneath the cursor because another figure may have captured
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* the mouse and will continue to get mouse events until capture is
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* released.
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*
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* @return the mouse target
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*/
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protected IFigure getMouseTarget() {
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return mouseTarget;
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}
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/**
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* Returns the root figure for this dispatcher.
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*
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* @return the root figure
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*/
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protected IFigure getRoot() {
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return root;
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}
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/**
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* @see EventDispatcher#isCaptured()
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*/
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public boolean isCaptured() {
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return captured;
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}
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private void receive(org.eclipse.swt.events.MouseEvent me) {
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currentEvent = null;
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updateFigureUnderCursor(me);
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int state = me.stateMask;
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if (captured) {
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if (mouseTarget != null)
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currentEvent = new MouseEvent(me.x, me.y, this, mouseTarget,
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me.button, state);
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} else {
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IFigure f = root.findMouseEventTargetAt(me.x, me.y);
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if (f == mouseTarget) {
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if (mouseTarget != null)
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currentEvent = new MouseEvent(me.x, me.y, this,
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mouseTarget, me.button, state);
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return;
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}
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if (mouseTarget != null) {
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currentEvent = new MouseEvent(me.x, me.y, this, mouseTarget,
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me.button, state);
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mouseTarget.handleMouseExited(currentEvent);
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}
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setMouseTarget(f);
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if (mouseTarget != null) {
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currentEvent = new MouseEvent(me.x, me.y, this, mouseTarget,
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me.button, state);
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mouseTarget.handleMouseEntered(currentEvent);
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}
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}
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}
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395
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|
|
396
|
/**
|
|
397
|
* @see EventDispatcher#releaseCapture()
|
|
398
|
*/
|
|
399
|
protected void releaseCapture() {
|
|
400
|
captured = false;
|
|
401
|
}
|
|
402
|
|
|
403
|
/**
|
|
404
|
* @see EventDispatcher#requestFocus(IFigure)
|
|
405
|
*/
|
|
406
|
public void requestFocus(IFigure fig) {
|
|
407
|
setFocus(fig);
|
|
408
|
}
|
|
409
|
|
|
410
|
/**
|
|
411
|
* @see EventDispatcher#requestRemoveFocus(IFigure)
|
|
412
|
*/
|
|
413
|
public void requestRemoveFocus(IFigure fig) {
|
|
414
|
if (getFocusOwner() == fig)
|
|
415
|
setFocus(null);
|
|
416
|
if (mouseTarget == fig)
|
|
417
|
mouseTarget = null;
|
|
418
|
if (cursorTarget == fig)
|
|
419
|
cursorTarget = null;
|
|
420
|
if (hoverSource == fig)
|
|
421
|
hoverSource = null;
|
|
422
|
getFocusTraverseManager().setCurrentFocusOwner(null);
|
|
423
|
}
|
|
424
|
|
|
425
|
/**
|
|
426
|
* @see EventDispatcher#setCapture(IFigure)
|
|
427
|
*/
|
|
428
|
protected void setCapture(IFigure figure) {
|
|
429
|
captured = true;
|
|
430
|
mouseTarget = figure;
|
|
431
|
}
|
|
432
|
|
|
433
|
/**
|
|
434
|
* @see EventDispatcher#setControl(Control)
|
|
435
|
*/
|
|
436
|
public void setControl(Control c) {
|
|
437
|
if (c == control)
|
|
438
|
return;
|
|
439
|
if (control != null && !control.isDisposed())
|
|
440
|
throw new RuntimeException(
|
|
441
|
"Can not set control again once it has been set"); //$NON-NLS-1$
|
|
442
|
if (c != null)
|
|
443
|
c.addDisposeListener(new org.eclipse.swt.events.DisposeListener() {
|
|
444
|
public void widgetDisposed(DisposeEvent e) {
|
|
445
|
if (toolTipHelper != null)
|
|
446
|
toolTipHelper.dispose();
|
|
447
|
}
|
|
448
|
});
|
|
449
|
control = c;
|
|
450
|
}
|
|
451
|
|
|
452
|
/**
|
|
453
|
* Sets the mouse cursor.
|
|
454
|
*
|
|
455
|
* @param c
|
|
456
|
* the new cursor
|
|
457
|
*/
|
|
458
|
protected void setCursor(Cursor c) {
|
|
459
|
if (c == null && cursor == null) {
|
|
460
|
return;
|
|
461
|
} else if ((c != cursor) || (!c.equals(cursor))) {
|
|
462
|
cursor = c;
|
|
463
|
if (control != null && !control.isDisposed())
|
|
464
|
control.setCursor(c);
|
|
465
|
}
|
|
466
|
}
|
|
467
|
|
|
468
|
/**
|
|
469
|
* Enables key traversal via TAB and ALT+TAB if <i>traverse</i> is
|
|
470
|
* <code>true</code>. Disables it otherwise.
|
|
471
|
*
|
|
472
|
* @param traverse
|
|
473
|
* whether key traversal should be enabled
|
|
474
|
*/
|
|
475
|
public void setEnableKeyTraversal(boolean traverse) {
|
|
476
|
figureTraverse = traverse;
|
|
477
|
}
|
|
478
|
|
|
479
|
/**
|
|
480
|
* Sets the figure under the mouse cursor.
|
|
481
|
*
|
|
482
|
* @param f
|
|
483
|
* the new figure under the cursor
|
|
484
|
*/
|
|
485
|
protected void setFigureUnderCursor(IFigure f) {
|
|
486
|
if (cursorTarget == f)
|
|
487
|
return;
|
|
488
|
cursorTarget = f;
|
|
489
|
updateCursor();
|
|
490
|
}
|
|
491
|
|
|
492
|
/**
|
|
493
|
* Sets the focus figure. If the figure currently with focus is not
|
|
494
|
* <code>null</code>, {@link IFigure#handleFocusLost(FocusEvent)} is called
|
|
495
|
* on the current focused figure. If the new focus figure is not
|
|
496
|
* <code>null</code>, this will call
|
|
497
|
* {@link IFigure#handleFocusGained(FocusEvent)} on the new focused figure.
|
|
498
|
*
|
|
499
|
* @param fig
|
|
500
|
* the new focus figure
|
|
501
|
*/
|
|
502
|
protected void setFocus(IFigure fig) {
|
|
503
|
if (fig == focusOwner)
|
|
504
|
return;
|
|
505
|
FocusEvent fe = new FocusEvent(focusOwner, fig);
|
|
506
|
IFigure oldOwner = focusOwner;
|
|
507
|
focusOwner = fig;
|
|
508
|
if (oldOwner != null)
|
|
509
|
oldOwner.handleFocusLost(fe);
|
|
510
|
if (fig != null)
|
|
511
|
getFocusTraverseManager().setCurrentFocusOwner(fig);
|
|
512
|
if (focusOwner != null)
|
|
513
|
focusOwner.handleFocusGained(fe);
|
|
514
|
}
|
|
515
|
|
|
516
|
/**
|
|
517
|
* Sets the figure that the mouse cursor is hovering over.
|
|
518
|
*
|
|
519
|
* @param figure
|
|
520
|
* the new hover source
|
|
521
|
* @param me
|
|
522
|
* the mouse event
|
|
523
|
*/
|
|
524
|
protected void setHoverSource(Figure figure,
|
|
525
|
org.eclipse.swt.events.MouseEvent me) {
|
|
526
|
hoverSource = figure;
|
|
527
|
if (figure != null) {
|
|
528
|
Control control = (Control) me.getSource();
|
|
529
|
org.eclipse.swt.graphics.Point absolute;
|
|
530
|
absolute = control.toDisplay(new org.eclipse.swt.graphics.Point(
|
|
531
|
me.x, me.y));
|
|
532
|
toolTipHelper = getToolTipHelper();
|
|
533
|
toolTipHelper.updateToolTip(hoverSource, getCurrentToolTip(),
|
|
534
|
absolute.x, absolute.y);
|
|
535
|
} else if (toolTipHelper != null) {
|
|
536
|
// Update with null to clear hoverSource in ToolTipHelper
|
|
537
|
toolTipHelper.updateToolTip(hoverSource, getCurrentToolTip(), me.x,
|
|
538
|
me.y);
|
|
539
|
}
|
|
540
|
}
|
|
541
|
|
|
542
|
/**
|
|
543
|
* Sets the given figure to be the target of future mouse events.
|
|
544
|
*
|
|
545
|
* @param figure
|
|
546
|
* the new mouse target
|
|
547
|
*/
|
|
548
|
protected void setMouseTarget(IFigure figure) {
|
|
549
|
mouseTarget = figure;
|
|
550
|
}
|
|
551
|
|
|
552
|
/**
|
|
553
|
* @see EventDispatcher#setRoot(IFigure)
|
|
554
|
*/
|
|
555
|
public void setRoot(IFigure figure) {
|
|
556
|
root = figure;
|
|
557
|
}
|
|
558
|
|
|
559
|
/**
|
|
560
|
* @see EventDispatcher#updateCursor()
|
|
561
|
*/
|
|
562
|
protected void updateCursor() {
|
|
563
|
Cursor newCursor = null;
|
|
564
|
if (cursorTarget != null)
|
|
565
|
newCursor = cursorTarget.getCursor();
|
|
566
|
setCursor(newCursor);
|
|
567
|
}
|
|
568
|
|
|
569
|
/**
|
|
570
|
* Updates the figure under the cursor, unless the mouse is captured, in
|
|
571
|
* which case all mouse events will be routed to the figure that captured
|
|
572
|
* the mouse.
|
|
573
|
*
|
|
574
|
* @param me
|
|
575
|
* the mouse event
|
|
576
|
*/
|
|
577
|
protected void updateFigureUnderCursor(org.eclipse.swt.events.MouseEvent me) {
|
|
578
|
if (!captured) {
|
|
579
|
IFigure f = root.findFigureAt(me.x, me.y);
|
|
580
|
setFigureUnderCursor(f);
|
|
581
|
if (cursorTarget != hoverSource)
|
|
582
|
updateHoverSource(me);
|
|
583
|
}
|
|
584
|
}
|
|
585
|
|
|
586
|
/**
|
|
587
|
* Updates the figure that will receive hover events. The hover source must
|
|
588
|
* have a tooltip. If the figure under the mouse doesn't have a tooltip set,
|
|
589
|
* this method will walk up the ancestor hierarchy until either a figure
|
|
590
|
* with a tooltip is found or it gets to the root figure.
|
|
591
|
*
|
|
592
|
* @param me
|
|
593
|
* the mouse event
|
|
594
|
*/
|
|
595
|
protected void updateHoverSource(org.eclipse.swt.events.MouseEvent me) {
|
|
596
|
/*
|
|
597
|
* Derive source from figure under cursor. Set the source in
|
|
598
|
* setHoverSource(); If figure.getToolTip() is null, get parent's
|
|
599
|
* toolTip Continue parent traversal until a toolTip is found or root is
|
|
600
|
* reached.
|
|
601
|
*/
|
|
602
|
if (cursorTarget != null) {
|
|
603
|
boolean sourceFound = false;
|
|
604
|
Figure source = (Figure) cursorTarget;
|
|
605
|
while (!sourceFound && source.getParent() != null) {
|
|
606
|
if (source.getToolTip() != null)
|
|
607
|
sourceFound = true;
|
|
608
|
else
|
|
609
|
source = (Figure) source.getParent();
|
|
610
|
}
|
|
611
|
setHoverSource(source, me);
|
|
612
|
} else {
|
|
613
|
setHoverSource(null, me);
|
|
614
|
}
|
|
615
|
}
|
|
616
|
|
|
617
|
}
|