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/*****************************************************************************
* Copyright (c) 2010 CEA LIST.
*
* 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:
* Nicolas Bros (Mia-Software) - initial API and implementation
* Nicolas Guyomar (Mia-Software) - initial API and implementation
* Nicolas Bros (Mia-Software) - Bug 339664 - org.eclipse.papyrus.emf.facet.widgets.celleditors API cleaning
* Nicolas Bros (Mia-Software) - Bug 334539 - [celleditors] change listener
* Grégoire Dupé (Mia-Software) - Bug 424122 - [Table] Images, fonts and colors are not shared between the instances of table
*****************************************************************************/
package org.eclipse.papyrus.emf.facet.widgets.celleditors.internal.core.composite;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import java.util.TreeMap;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.fieldassist.ComboContentAdapter;
import org.eclipse.jface.fieldassist.ContentProposalAdapter;
import org.eclipse.jface.fieldassist.SimpleContentProposalProvider;
import org.eclipse.papyrus.emf.facet.util.swt.fontprovider.IFontProvider;
import org.eclipse.papyrus.emf.facet.util.swt.fontprovider.IFontProviderFactory;
import org.eclipse.papyrus.emf.facet.widgets.celleditors.AbstractCellEditorComposite;
import org.eclipse.papyrus.emf.facet.widgets.celleditors.internal.Messages;
import org.eclipse.papyrus.emf.facet.widgets.internal.CustomizableLabelProvider;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.DisposeEvent;
import org.eclipse.swt.events.DisposeListener;
import org.eclipse.swt.events.KeyAdapter;
import org.eclipse.swt.events.KeyEvent;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.FontData;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Combo;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.ui.dialogs.ElementListSelectionDialog;
/** A cell editor for unary references */
public class UnaryReferenceCellEditorComposite extends AbstractCellEditorComposite<EObject> {
private static final int GRID_DATA_HEIGHT = 50;
private final Button button;
private final Combo combo;
private final Control parentControl;
private final Map<String, EObject> fElements = new TreeMap<String, EObject>();
/**
* @param parent
* the parent composite
* @param eObjects
* the possible choices
*/
public UnaryReferenceCellEditorComposite(final Composite parent, final List<EObject> eObjects) {
super(parent);
this.parentControl = parent;
CustomizableLabelProvider customizableLabelProvider = new CustomizableLabelProvider();
for (EObject eObject : eObjects) {
String label = customizableLabelProvider.getText(eObject);
// find a unique label
if (this.fElements.get(label) != null) {
int suffix = 2;
while (this.fElements.get(label + " (" + suffix + ")") != null) { //$NON-NLS-1$ //$NON-NLS-2$
suffix++;
}
this.fElements.put(label + " (" + suffix + ")", eObject); //$NON-NLS-1$//$NON-NLS-2$
} else {
this.fElements.put(label, eObject);
}
}
GridLayout compositeLayout = new GridLayout(2, false);
compositeLayout.marginHeight = 0;
compositeLayout.marginWidth = 0;
compositeLayout.horizontalSpacing = 0;
setLayout(compositeLayout);
this.combo = new Combo(this, SWT.DROP_DOWN);
// reduce the font so that the Combo fits in the cell
FontData[] fontData = Display.getDefault().getSystemFont().getFontData();
fontData[0].setHeight(fontData[0].getHeight() - 2);
final IFontProvider fontProvider = IFontProviderFactory.DEFAULT
.getOrCreateIFontProvider(Display.getDefault());
final Font font = fontProvider.getFont(fontData[0]);
this.combo.setFont(font);
for (String label : this.fElements.keySet()) {
this.combo.add(label);
}
GridData comboGridData = new GridData(SWT.FILL, SWT.FILL, true, true);
this.combo.setLayoutData(comboGridData);
addCompletionHandler(this.combo, this.fElements.keySet());
this.combo.addKeyListener(new KeyAdapter() {
@Override
public void keyPressed(final KeyEvent event) {
// Enter key pressed
if ((event.keyCode == SWT.CR && event.stateMask == 0)
|| (event.keyCode == SWT.KEYPAD_CR && event.stateMask == 0)) {
if (isValid()) {
commit();
} else {
MessageDialog.openWarning(parent.getShell(),
Messages.UnaryReferenceCellEditorComposite_0,
Messages.UnaryReferenceCellEditorComposite_1);
}
} else if (event.keyCode == SWT.ESC && event.stateMask == 0) {
// Escape key pressed
close();
}
}
});
this.button = new Button(this, SWT.PUSH);
this.button.setText("..."); //$NON-NLS-1$
GridData buttonGridData = new GridData(SWT.FILL, SWT.FILL, false, true);
buttonGridData.heightHint = UnaryReferenceCellEditorComposite.GRID_DATA_HEIGHT;
this.button.setLayoutData(buttonGridData);
this.button.addSelectionListener(new SelectionAdapter() {
@Override
public void widgetSelected(final SelectionEvent e) {
ElementListSelectionDialog dialog = new ElementListSelectionDialog(
UnaryReferenceCellEditorComposite.this.getParentControl().getShell(),
new CustomizableLabelProvider()) {
@Override
protected void okPressed() {
Object[] selectedElements = getSelectedElements();
String selectedElementLabel = null;
if (selectedElements.length > 0) {
Set<Entry<String, EObject>> entrySet = UnaryReferenceCellEditorComposite.this
.getfElements().entrySet();
for (Entry<String, EObject> entry : entrySet) {
if (entry.getValue() == selectedElements[0]) {
selectedElementLabel = entry.getKey();
break;
}
}
}
UnaryReferenceCellEditorComposite.this.getCombo().setText(
selectedElementLabel);
commit();
super.okPressed();
}
};
dialog.setTitle(Messages.UnaryReferenceCellEditorComposite_2);
dialog.setElements(eObjects.toArray());
dialog.open();
}
});
// commit the cell editor when the mouse is clicked
// anywhere outside the text field
final Listener clickListener = new Listener() {
public void handleEvent(final Event event) {
if (event.widget instanceof Control) {
Control control = (Control) event.widget;
if (control.getShell() == UnaryReferenceCellEditorComposite.this
.getParentControl().getShell()
&& event.widget != UnaryReferenceCellEditorComposite.this.getButton()
&& event.widget != UnaryReferenceCellEditorComposite.this.getCombo()) {
if (isValid()) {
commit();
}
}
}
}
};
Display.getDefault().addFilter(SWT.MouseDown, clickListener);
// this listener is only here to remove
// the other listener from the Display
addDisposeListener(new DisposeListener() {
public void widgetDisposed(final DisposeEvent e) {
Display.getDefault().removeFilter(SWT.MouseDown, clickListener);
}
});
this.combo.addModifyListener(new ModifyListener() {
public void modifyText(final ModifyEvent e) {
fireChanged();
}
});
this.combo.forceFocus();
}
protected boolean isValid() {
return this.fElements.get(this.combo.getText()) != null;
}
private static void addCompletionHandler(final Combo comboBox, final Collection<String> completions) {
String[] completionsArray = completions.toArray(new String[completions.size()]);
SimpleContentProposalProvider contentProposalProvider = new SimpleContentProposalProvider(
completionsArray);
contentProposalProvider.setFiltering(true);
ContentProposalAdapter adapter = new ContentProposalAdapter(comboBox,
new ComboContentAdapter(), contentProposalProvider, null, null);
// adapter.setFilterStyle(ContentProposalAdapter.FILTER_CHARACTER);
adapter.setProposalAcceptanceStyle(ContentProposalAdapter.PROPOSAL_REPLACE);
}
public EObject getValue() {
EObject eObject = this.fElements.get(this.combo.getText());
return eObject;
}
protected void commit() {
fireCommit();
}
public void setValue(final EObject value) {
//
}
protected Button getButton() {
return this.button;
}
protected Combo getCombo() {
return this.combo;
}
protected Control getParentControl() {
return this.parentControl;
}
protected Map<String, EObject> getfElements() {
return this.fElements;
}
}
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