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/*******************************************************************************
* Copyright (c) 2011 Google, Inc.
* 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:
* Google, Inc. - initial API and implementation
*******************************************************************************/
package org.eclipse.wb.internal.core.model.property.editor.presentation;
import com.google.common.collect.Maps;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.wb.internal.core.model.property.Property;
import org.eclipse.wb.internal.core.model.property.table.PropertyTable;
import org.eclipse.wb.internal.core.utils.Pair;
import java.util.Map;
/**
* Internal implementation of {@link PropertyEditorPresentation} for displaying {@link Button}.
*
* @author scheglov_ke
* @author mitin_aa
* @coverage core.model.property.editor
*/
class ButtonPropertyEditorPresentationImpl extends PropertyEditorPresentation {
protected final PropertyToControlMap m_propertyToControl = new PropertyToControlMap();
private final ButtonPropertyEditorPresentation m_presentation;
////////////////////////////////////////////////////////////////////////////
//
// Constructor
//
////////////////////////////////////////////////////////////////////////////
public ButtonPropertyEditorPresentationImpl(ButtonPropertyEditorPresentation presentation) {
m_presentation = presentation;
}
////////////////////////////////////////////////////////////////////////////
//
// PropertyEditorPresentation
//
////////////////////////////////////////////////////////////////////////////
@Override
public final void hide(PropertyTable propertyTable, Property property) {
Control control = m_propertyToControl.remove(propertyTable, property);
if (control != null) {
control.dispose();
}
}
@Override
public final int show(PropertyTable propertyTable,
Property property,
int x,
int y,
int width,
int height) {
// prepare control
Control control = m_propertyToControl.get(propertyTable, property);
if (control == null) {
control = createControl(propertyTable, property);
}
// set bounds
final int controlWidth = height;
final int controlX = x + width - controlWidth;
setBounds(control, controlX, y, controlWidth, height);
return controlWidth;
}
/**
* Finds and select the appropriate {@link Control} belonging to given property.
*/
public void setSelection(PropertyTable propertyTable, Property property, boolean selected) {
Button button = (Button) m_propertyToControl.get(propertyTable, property);
if (button != null) {
button.setSelection(selected);
}
}
////////////////////////////////////////////////////////////////////////////
//
// Control
//
////////////////////////////////////////////////////////////////////////////
/**
* Creates the control for given property and initializes newly created control.
*/
private Control createControl(final PropertyTable propertyTable, final Property property) {
Control control = createControlImpl(propertyTable, property);
m_propertyToControl.put(propertyTable, property, control);
// when Control disposed, remove Control/Property from map to avoid memory leak
control.addListener(SWT.Dispose, new Listener() {
@Override
public void handleEvent(Event e) {
m_propertyToControl.remove(propertyTable, property);
}
});
// activate property on mouse down
control.addListener(SWT.MouseDown, new Listener() {
@Override
public void handleEvent(Event event) {
propertyTable.deactivateEditor(true);
propertyTable.setActiveProperty(property);
}
});
// return focus on propertyTable after click
control.addListener(SWT.MouseUp, new Listener() {
@Override
public void handleEvent(Event event) {
propertyTable.forceFocus();
}
});
// handle selection
control.addListener(SWT.Selection, new Listener() {
@Override
public void handleEvent(Event event) {
try {
getPresentation().onClick(propertyTable, property);
} catch (Throwable e) {
propertyTable.deactivateEditor(false);
propertyTable.handleException(e);
}
}
});
return control;
}
/**
* Creates the {@link Control} instance. By default, {@link Button} instance created.
*/
protected Control createControlImpl(final PropertyTable propertyTable, final Property property) {
Button button = new Button(propertyTable, getPresentation().getStyle());
button.setImage(getPresentation().getImage());
button.setToolTipText(getPresentation().getTooltip());
return button;
}
////////////////////////////////////////////////////////////////////////////
//
// Access
//
////////////////////////////////////////////////////////////////////////////
/**
* @return the 'parent' presentation. Internal usage only.
*/
protected final ButtonPropertyEditorPresentation getPresentation() {
return m_presentation;
}
////////////////////////////////////////////////////////////////////////////
//
// Utils
//
////////////////////////////////////////////////////////////////////////////
/**
* Sets new bounds for {@link Control}, optimizing when possible.
*/
private static void setBounds(Control control, int newX, int newY, int newWidth, int newHeight) {
// check, may be Control is invisible, so no reason to change bounds
{
// is in negative zone
if (newY + newHeight < 0) {
control.setVisible(false);
return;
}
// is out of client area height
Rectangle parentArea = control.getParent().getClientArea();
if (newY > parentArea.height) {
control.setVisible(false);
return;
}
}
// well, now we sure that Control is visible
if (!control.getVisible()) {
control.setVisible(true);
}
// prepare old size, remember new
Integer oldWidthObject = (Integer) control.getData("oldWidth");
Integer oldHeightObject = (Integer) control.getData("oldHeight");
control.setData("oldWidth", newWidth);
control.setData("oldHeight", newHeight);
// check, may be same size
if (oldWidthObject != null) {
int oldWidth = oldWidthObject.intValue();
int oldHeight = oldHeightObject.intValue();
if (oldWidth == newWidth && oldHeight == newHeight) {
control.setLocation(newX, newY);
return;
}
}
// no any optimization possible, just set bounds
control.setBounds(newX, newY, newWidth, newHeight);
}
////////////////////////////////////////////////////////////////////////////
//
// Controls map
//
////////////////////////////////////////////////////////////////////////////
protected static final class PropertyToControlMap {
private final Map<Pair<PropertyTable, Property>, Control> m_map = Maps.newHashMap();
void put(PropertyTable propertyTable, Property property, Control control) {
m_map.put(Pair.create(propertyTable, property), control);
}
Control remove(PropertyTable propertyTable, Property property) {
return m_map.remove(Pair.create(propertyTable, property));
}
Control get(PropertyTable propertyTable, Property property) {
return m_map.get(Pair.create(propertyTable, property));
}
}
}
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