Attachment 13123 Details for Bug 63235 – A version of WidgetMethodHandler based on comment 15 that appears to fix the problem

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A version of WidgetMethodHandler based on comment 15 that appears to fix the problem

(text/plain), 6.45 KB, created by David Green

on 2004-07-09 19:47:21 EDT

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Creator: David Green

Created: 2004-07-09 19:47:21 EDT

Size: 6.45 KB

patch

obsolete

>/*******************************************************************************
> * Copyright (c) 2000, 2004 IBM Corporation and others.
> * All rights reserved. This program and the accompanying materials 
> * are made available under the terms of the Common Public License v1.0
> * which accompanies this distribution, and is available at
> * http://www.eclipse.org/legal/cpl-v10.html
> * 
> * Contributors:
> *     IBM Corporation - initial API and implementation
> *******************************************************************************/
>package org.eclipse.ui.internal.commands.ws;
>
>import java.lang.reflect.InvocationTargetException;
>import java.lang.reflect.Method;
>import java.util.Collections;
>import java.util.HashMap;
>import java.util.Map;
>
>import javax.swing.FocusManager;
>import javax.swing.SwingUtilities;
>
>import org.eclipse.core.runtime.IConfigurationElement;
>import org.eclipse.core.runtime.IExecutableExtension;
>import org.eclipse.swt.SWT;
>import org.eclipse.swt.widgets.Composite;
>import org.eclipse.swt.widgets.Control;
>import org.eclipse.swt.widgets.Display;
>import org.eclipse.ui.commands.AbstractHandler;
>import org.eclipse.ui.commands.ExecutionException;
>
>/**
> * Handles the cut command in both dialogs and windows. This handler is enabled
> * if the focus control supports the "cut" method.
> * 
> * @since 3.0
> */
>public class WidgetMethodHandler extends AbstractHandler implements
>        IExecutableExtension {
>
>    /**
>     * The name of the attribute controlling the enabled state.
>     */
>    private static final String ATTRIBUTE_ENABLED = "enabled"; //$NON-NLS-1$
>
>    /**
>     * The name of the attribute for the identifier.
>     */
>    private static final String ATTRIBUTE_ID = "id"; //$NON-NLS-1$
>
>    /**
>     * The parameters to pass to the method this handler invokes. This handler
>     * always passes no parameters.
>     */
>    protected static final Class[] NO_PARAMETERS = new Class[0];
>
>    /**
>     * The name of the method to be invoked by this handler. This value should
>     * never be <code>null</code>.
>     */
>    protected String methodName;
>
>    /*
>     * (non-Javadoc)
>     * 
>     * @see org.eclipse.ui.commands.IHandler#execute(java.lang.Object)
>     */
>    public Object execute(Map parameterValuesByName) throws ExecutionException {
>        final Method methodToExecute = getMethodToExecute();
>        if (methodToExecute != null) {
>            try {
>                final Control focusControl = Display.getCurrent()
>                        .getFocusControl();
>                if ((focusControl instanceof Composite)
>						&& ((((Composite) focusControl).getStyle() & SWT.EMBEDDED) != 0)) {
>					final FocusManager focusManager = FocusManager.getCurrentManager();
>					final java.awt.Component focusComponent = focusManager.getFocusOwner();
>					if (focusComponent != null) {
>						Runnable methodRunnable = new Runnable() {
>							public void run() {
>								try {
>									methodToExecute.invoke(focusComponent, null);
>								} catch (IllegalAccessException e) {
>					                // The method is protected, so do nothing.
>					            } catch (InvocationTargetException e) {
>					                e.printStackTrace();
>					            }
>							}
>						};
>						SwingUtilities.invokeLater(methodRunnable);
>					}
>				} else {
>					methodToExecute.invoke(focusControl, null);
>				}
>            } catch (IllegalAccessException e) {
>                // The method is protected, so do nothing.
>            } catch (InvocationTargetException e) {
>                throw new ExecutionException(
>                        "An exception occurred while executing " //$NON-NLS-1$
>                                + getMethodToExecute(), e.getTargetException());
>            }
>        }
>
>        return null;
>    }
>
>    public Map getAttributeValuesByName() {
>        Map attributeValuesByName = new HashMap();
>        attributeValuesByName.put(ATTRIBUTE_ENABLED,
>                getMethodToExecute() == null ? Boolean.FALSE : Boolean.TRUE);
>        attributeValuesByName.put(ATTRIBUTE_ID, null);
>        return Collections.unmodifiableMap(attributeValuesByName);
>    }
>
>    /**
>     * Looks up the method on the focus control.
>     * 
>     * @return The method on the focus control; <code>null</code> if none.
>     */
>    protected Method getMethodToExecute() {
>        final Control focusControl = Display.getCurrent().getFocusControl();
>        Method method = null;
>
>        if (focusControl != null) {
>            Class clazz = focusControl.getClass();
>            while (clazz != null) {
>                try {
>                    System.out.println("clazz = " + clazz.getName());
>                    method = clazz.getMethod(methodName, NO_PARAMETERS);
>                } catch (NoSuchMethodException e) {
>                    clazz = clazz.getSuperclass();
>                }
>            }
>        }
>
>        if ((method == null)
>                && (focusControl instanceof Composite)
>                && ((((Composite) focusControl).getStyle() & SWT.EMBEDDED) != 0)) {
>            /*
>             * We couldn't find the appropriate method on the current focus
>             * control. It is possible that the current focus control is an
>             * embedded SWT composite, which could be containing some Swing
>             * components. If this is the case, then we should try to pass
>             * through to the underlying Swing component hierarchy. Insha'allah,
>             * this will work.
>             */
>            final FocusManager focusManager = FocusManager.getCurrentManager();
>            final java.awt.Component focusComponent = focusManager.getFocusOwner();
>            Class clazz = focusComponent.getClass();
>            
>            try {
>                method = clazz.getMethod(methodName, NO_PARAMETERS);
>            } catch (NoSuchMethodException e) {
>                clazz = clazz.getSuperclass();
>            }
>        }
>        System.out.println("method = " + method);
>
>        return method;
>    }
>
>    /*
>     * (non-Javadoc)
>     * 
>     * @see org.eclipse.core.runtime.IExecutableExtension#setInitializationData(org.eclipse.core.runtime.IConfigurationElement,
>     *      java.lang.String, java.lang.Object)
>     */
>    public void setInitializationData(IConfigurationElement config,
>            String propertyName, Object data) {
>        // The data is really just a string (i.e., the method name).
>        methodName = data.toString();
>    }
>}

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Attachments on bug 63235: 12342 | 12344 | 13123 | 13124