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/*******************************************************************************
* Copyright (c) 2008 Oracle. 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:
* Oracle - initial API and implementation
******************************************************************************/
package org.eclipse.jpt.ui.internal.widgets;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerFilter;
import org.eclipse.jpt.ui.JptUiPlugin;
import org.eclipse.jpt.ui.internal.util.SWTUtil;
import org.eclipse.jpt.utility.model.Model;
import org.eclipse.jpt.utility.model.value.PropertyValueModel;
import org.eclipse.jpt.utility.model.value.WritablePropertyValueModel;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.ui.dialogs.ElementTreeSelectionDialog;
import org.eclipse.ui.dialogs.ISelectionStatusValidator;
import org.eclipse.ui.model.WorkbenchContentProvider;
import org.eclipse.ui.model.WorkbenchLabelProvider;
import org.eclipse.ui.views.navigator.ResourceComparator;
/**
* This chooser allows the user to choose a file when browsing.
* <p>
* Here the layout of this pane:
* <pre>
* -----------------------------------------------------------------------------
* | ---------------------------------------------------- ------------- |
* | Label: | I | | Browse... | |
* | ---------------------------------------------------- ------------- |
* -----------------------------------------------------------------------------</pre>
*
* @version 2.0
* @since 2.0
*/
@SuppressWarnings("nls")
public abstract class FileChooserPane<T extends Model> extends ChooserPane<T>
{
private WritablePropertyValueModel<String> textHolder;
/**
* Creates a new <code>FileChooserPane</code>.
*
* @param parentPane The parent pane of this one
* @param parent The parent container
*/
public FileChooserPane(Pane<? extends T> parentPane,
Composite parent) {
super(parentPane, parent);
}
/**
* Creates a new <code>FileChooserPane</code>.
*
* @param parentPane The parent container of this one
* @param subjectHolder The holder of this pane's subject
* @param parent The parent container
*/
public FileChooserPane(Pane<?> parentPane,
PropertyValueModel<? extends T> subjectHolder,
Composite parent) {
super(parentPane, subjectHolder, parent);
}
/*
* (non-Javadoc)
*/
@Override
protected Runnable buildBrowseAction() {
return new Runnable() {
public void run() {
promptFile();
}
};
}
/**
* Creates the <code>ViewerFilter</code> that will filter the content of the
* dialog and only displays what is valid.
*
* @return A new <code>ViewerFilter</code>
*/
protected ViewerFilter buildFilter() {
return new ViewerFilter() {
@Override
public boolean select(Viewer viewer,
Object parentElement,
Object element) {
return true;
}
};
}
/*
* (non-Javadoc)
*/
@Override
protected Control addMainControl(Composite container) {
return addText(container, textHolder);
}
private PostExecution<ElementTreeSelectionDialog> buildSelectionDialogPostExecution() {
return new PostExecution<ElementTreeSelectionDialog>() {
public void execute(ElementTreeSelectionDialog dialog) {
if (dialog.getReturnCode() == IDialogConstants.OK_ID) {
textHolder.setValue(dialog.getResult()[0].toString());
}
}
};
}
/**
* Creates the value holder of the subject's property.
*
* @return The holder of the class name
*/
protected abstract WritablePropertyValueModel<String> buildTextHolder();
/**
* Creates the validator that will show a status message based on what is
* selected in the selection dialog.
*
* @return A new <code>ISelectionStatusValidator</code>
*/
protected ISelectionStatusValidator buildValidator() {
return new ISelectionStatusValidator() {
public IStatus validate(Object[] selection) {
if (selection.length != 1) {
return new Status(IStatus.ERROR, JptUiPlugin.PLUGIN_ID, "");
}
return new Status(IStatus.OK, JptUiPlugin.PLUGIN_ID, "");
}
};
}
/**
* Returns the message to be shown in the selection dialog.
*
* @return A non-<code>null</code> string shown above the text field of the
* selection dialog
*/
protected abstract String getDialogMessage();
/**
* Returns the selection dialog's title.
*
* @return A non-<code>null</code> string
*/
protected abstract String getDialogTitle();
/**
* Retrieves the root input that will be used by the selection dialog.
*
* @return The input used to display its content in a selection dialog
*/
protected abstract IResource getDialogInput();
/*
* (non-Javadoc)
*/
@Override
protected void initialize() {
super.initialize();
textHolder = buildTextHolder();
}
/**
* The browse button was clicked, its action invokes this action which should
* prompt the user to select a file and set it.
*/
protected void promptFile() {
ElementTreeSelectionDialog dialog = new ElementTreeSelectionDialog(
getShell(),
new WorkbenchLabelProvider(),
new WorkbenchContentProvider()
);
dialog.setHelpAvailable(false);
dialog.setValidator(buildValidator());
dialog.setTitle(getDialogTitle());
dialog.setMessage(getDialogMessage());
dialog.addFilter(buildFilter());
dialog.setInput(getDialogInput());
dialog.setComparator(new ResourceComparator(ResourceComparator.NAME));
SWTUtil.show(dialog, buildSelectionDialogPostExecution());
}
}
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