/*******************************************************************************
* Copyright (c) 2006 Sybase, Inc. and others.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Sybase, Inc. - initial API and implementation
*******************************************************************************/
package org.eclipse.jst.pagedesigner.dnd.internal;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.viewers.DoubleClickEvent;
import org.eclipse.jface.viewers.IDoubleClickListener;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.IStructuredContentProvider;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.viewers.ListViewer;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerSorter;
import org.eclipse.jface.wizard.IWizard;
import org.eclipse.jface.wizard.IWizardNode;
import org.eclipse.jface.wizard.WizardSelectionPage;
import org.eclipse.jst.pagedesigner.dnd.FeedBackInfo;
import org.eclipse.jst.pagedesigner.dnd.ILocalDropHandler;
import org.eclipse.jst.pagedesigner.dom.IDOMPosition;
import org.eclipse.jst.pagedesigner.viewer.IHTMLGraphicalViewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Label;
import org.w3c.dom.Node;
/**
* UI wizard selection page. To let user select which ILocalDropHandler to use
* to handle the drop.
*
* @author mengbo
*/
public class SimpleWizardSelectionPage extends WizardSelectionPage implements
ISelectionChangedListener {
private Object _localData;
private IHTMLGraphicalViewer _viewer;
private boolean _updateWidget;
private Node _widget;
private IDOMPosition _position;
/**
* for those handler that support wizard, then map to WizardNode, otherwise
* still map to the handler
*/
private Map _objToWizardNodeOrHandler = new HashMap();
private Map _feedbackToHandlers;
private Object _currentHandler = null; // IWizardNode or a
// ILocalDropHandler that don't
// useWizard.
/**
* @param viewer
* @param localData
* @param handlers
*/
public SimpleWizardSelectionPage(IHTMLGraphicalViewer viewer,
Object localData, Map handlers) {
super(Messages.getString("SimpleWizardSelectionPage.PageName")); //$NON-NLS-1$
this.setTitle(Messages.getString("SimpleWizardSelectionPage.Title")); //$NON-NLS-1$
this.setDescription(Messages
.getString("SimpleWizardSelectionPage.Description")); //$NON-NLS-1$
this
.setMessage(Messages
.getString("SimpleWizardSelectionPage.Message")); //$NON-NLS-1$
this._viewer = viewer;
this._localData = localData;
this._feedbackToHandlers = handlers;
}
/*
* (non-Javadoc)
*
* @see org.eclipse.jface.dialogs.IDialogPage#createControl(org.eclipse.swt.widgets.Composite)
*/
public void createControl(Composite parent) {
Composite container = new Composite(parent, SWT.NONE);
GridLayout layout = new GridLayout();
layout.verticalSpacing = 10;
container.setLayout(layout);
container.setLayoutData(new GridData(GridData.FILL_BOTH));
Label label = new Label(container, SWT.NONE);
label
.setText(Messages
.getString("SimpleWizardSelectionPage.Operation")); //$NON-NLS-1$
GridData gd = new GridData();
label.setLayoutData(gd);
final ListViewer listViewer = new ListViewer(container);
listViewer.getControl().setLayoutData(new GridData(GridData.FILL_BOTH));
listViewer.setContentProvider(new IStructuredContentProvider() {
public Object[] getElements(Object inputElement) {
return ((List) inputElement).toArray();
}
public void dispose() {
// nothing to dispose
}
public void inputChanged(Viewer viewer, Object oldInput,
Object newInput) {
// no input changing
}
});
listViewer.setLabelProvider(new LabelProvider() {
public String getText(Object element) {
return SimpleWizardSelectionPage.this.getText(element);
}
});
listViewer.addDoubleClickListener(new IDoubleClickListener() {
public void doubleClick(DoubleClickEvent event) {
selectionChanged(new SelectionChangedEvent(listViewer,
listViewer.getSelection()));
advanceToNextPage();
}
});
listViewer.setSorter(new ViewerSorter());
listViewer.setInput(getElements());
listViewer.addSelectionChangedListener(this);
Dialog.applyDialogFont(container);
setControl(container);
}
/*
* (non-Javadoc)
*
* @see org.eclipse.jface.viewers.ISelectionChangedListener#selectionChanged(org.eclipse.jface.viewers.SelectionChangedEvent)
*/
public void selectionChanged(SelectionChangedEvent event) {
ISelection sel = event.getSelection();
if (sel instanceof IStructuredSelection) {
Object obj = ((IStructuredSelection) sel).getFirstElement();
if (obj != null) {
_currentHandler = this._objToWizardNodeOrHandler.get(obj);
if (_currentHandler == null) {
_currentHandler = getWizardNodeOrHandler(obj);
this._objToWizardNodeOrHandler.put(obj, _currentHandler);
}
if (_currentHandler instanceof IWizardNode) {
this.setSelectedNode((IWizardNode) _currentHandler);
} else {
this.getWizard().getContainer().updateButtons();
}
}
}
}
/**
* @param obj
* @return
*/
private Object getWizardNodeOrHandler(Object obj) {
final ILocalDropHandler dropHandler = (ILocalDropHandler) _feedbackToHandlers
.get(obj);
if (dropHandler.useWizard(_localData, _viewer)) {
return new IWizardNode() {
IWizard _wizard = null;
public void dispose() {
// nothing to dispose
}
public Point getExtent() {
return null;
}
public IWizard getWizard() {
if (_wizard == null) {
if (_updateWidget) {
_wizard = dropHandler.getWizard(_localData,
_widget, _viewer);
} else {
_wizard = dropHandler.getWizard(_localData,
_position, _viewer);
}
}
return _wizard;
}
public boolean isContentCreated() {
return _wizard != null;
}
};
}
return dropHandler;
}
/**
* could be have next page or just directly perform the action.
*
*/
public void advanceToNextPage() {
getContainer().showPage(getNextPage());
}
/**
* @param element
* @return the text
*/
protected String getText(Object element) {
return ((FeedBackInfo) element).getDescription();
}
/**
* @return the elements
*/
protected List getElements() {
return new ArrayList(this._feedbackToHandlers.keySet());
}
/**
* @param widget
*/
public void setWidget(Node widget) {
_updateWidget = true;
_widget = widget;
}
/**
* @param position
*/
public void setPosition(IDOMPosition position) {
_updateWidget = false;
_position = position;
}
/**
* @return the current handler
*/
public Object getCurrentHandler() {
return _currentHandler;
}
/*
* (non-Javadoc)
*
* @see org.eclipse.jface.wizard.WizardSelectionPage#canFlipToNextPage()
*/
public boolean canFlipToNextPage() {
return getCurrentHandler() instanceof IWizardNode
&& super.canFlipToNextPage();
}
}