/*******************************************************************************
* Copyright 2011 Google Inc. All Rights Reserved.
*
* 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
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*******************************************************************************/
package com.google.gdt.eclipse.designer.uibinder.model.widgets;
import com.google.gdt.eclipse.designer.model.widgets.panels.IDockLayoutPanelInfo;
import org.eclipse.wb.core.model.ObjectInfo;
import org.eclipse.wb.core.model.broadcast.ObjectInfoPresentationDecorateText;
import org.eclipse.wb.internal.core.model.property.Property;
import org.eclipse.wb.internal.core.utils.execution.ExecutionUtils;
import org.eclipse.wb.internal.core.utils.execution.RunnableEx;
import org.eclipse.wb.internal.core.utils.reflect.ReflectionUtils;
import org.eclipse.wb.internal.core.utils.xml.DocumentElement;
import org.eclipse.wb.internal.core.xml.model.EditorContext;
import org.eclipse.wb.internal.core.xml.model.TopBoundsSupport;
import org.eclipse.wb.internal.core.xml.model.clipboard.ClipboardCommand;
import org.eclipse.wb.internal.core.xml.model.clipboard.XmlObjectMemento;
import org.eclipse.wb.internal.core.xml.model.creation.CreationSupport;
import org.eclipse.wb.internal.core.xml.model.description.ComponentDescription;
import java.text.DecimalFormat;
import java.text.DecimalFormatSymbols;
import java.util.List;
import java.util.Locale;
/**
* Model for <code>com.google.gwt.user.client.ui.DockLayoutPanel</code>.
*
* @author scheglov_ke
* @coverage GWT.UiBinder.model
*/
public class DockLayoutPanelInfo extends ComplexPanelInfo
implements
IDockLayoutPanelInfo<WidgetInfo> {
private final Property m_unitProperty = new UnitAttributeProperty(this) {
@Override
protected void setValueEx(Object value) throws Exception {
value = toUnit(value);
scaleSize_whenChangeUnit(value);
super.setValueEx(value);
}
};
////////////////////////////////////////////////////////////////////////////
//
// Constructor
//
////////////////////////////////////////////////////////////////////////////
public DockLayoutPanelInfo(EditorContext context,
ComponentDescription description,
CreationSupport creationSupport) throws Exception {
super(context, description, creationSupport);
decorateWidgetText();
}
////////////////////////////////////////////////////////////////////////////
//
// Listeners
//
////////////////////////////////////////////////////////////////////////////
/**
* Decorate Widget's text with edge.
*/
private void decorateWidgetText() {
addBroadcastListener(new ObjectInfoPresentationDecorateText() {
public void invoke(ObjectInfo object, String[] text) throws Exception {
if (object instanceof WidgetInfo && object.getParent() == DockLayoutPanelInfo.this) {
String edgeName = getEdge((WidgetInfo) object);
text[0] = edgeName + " - " + text[0];
}
}
});
}
private void scaleSize_whenChangeUnit(Object value) throws Exception {
if (XmlObjectMemento.isApplying(this)) {
return;
}
if (value != Property.UNKNOWN_VALUE) {
double factorH = getFactor(value, false);
double factorV = getFactor(value, true);
for (WidgetInfo widget : getChildrenWidgets()) {
Double oldSize = getSize(widget);
if (oldSize != null) {
boolean isHorizontal = isHorizontalEdge(widget);
boolean isVertical = isVerticalEdge(widget);
if (isHorizontal) {
double newSize = oldSize * factorH;
setSize(widget, newSize);
}
if (isVertical) {
double newSize = oldSize * factorV;
setSize(widget, newSize);
}
}
}
}
}
private double getFactor(Object newUnit, boolean vertical) throws Exception {
Object oldUnit = getCurrentUnit();
double oldUnitSize = getUnitSize(oldUnit, vertical);
double newUnitSize = getUnitSize(newUnit, vertical);
return oldUnitSize / newUnitSize;
}
////////////////////////////////////////////////////////////////////////////
//
// Hierarchy
//
////////////////////////////////////////////////////////////////////////////
@Override
protected TopBoundsSupport createTopBoundsSupport() {
return new RootLayoutPanelTopBoundsSupport(this);
}
////////////////////////////////////////////////////////////////////////////
//
// Properties
//
////////////////////////////////////////////////////////////////////////////
@Override
protected List<Property> getPropertyList() throws Exception {
List<Property> properties = super.getPropertyList();
addUnitProperty(properties);
return properties;
}
protected void addUnitProperty(List<Property> properties) {
properties.add(m_unitProperty);
}
////////////////////////////////////////////////////////////////////////////
//
// Edge
//
////////////////////////////////////////////////////////////////////////////
public String getEdge(WidgetInfo widget) {
DocumentElement dockElement = widget.getElement().getParent();
return dockElement.getTagLocal().toUpperCase(Locale.ENGLISH);
}
/**
* @return <code>true</code> if given {@link WidgetInfo} is on horizontal edge (west or east).
*/
public boolean isHorizontalEdge(WidgetInfo widget) {
String edge = getEdge(widget);
return edge.equals("WEST") || edge.equals("EAST");
}
/**
* @return <code>true</code> if given {@link WidgetInfo} is on vertical edge (north or south).
*/
public boolean isVerticalEdge(WidgetInfo widget) {
String edge = getEdge(widget);
return edge.equals("NORTH") || edge.equals("SOUTH");
}
public void setEdge(WidgetInfo widget, String newEdge) throws Exception {
String oldEdge = getEdge(widget);
DocumentElement dockElement = widget.getElement().getParent();
// replace tag
dockElement.setTag(dockElement.getTagNS() + newEdge.toLowerCase());
// to CENTER
if ("CENTER".equals(newEdge) && !"CENTER".equals(oldEdge)) {
dockElement.setAttribute("size", null);
}
// from CENTER
if ("CENTER".equals(oldEdge) && !"CENTER".equals(newEdge)) {
setReasonableSize(widget);
}
}
/**
* This method is used by description based "Edge" property.
*/
void setEdge(final WidgetInfo widget, final Object edge) throws Exception {
if (edge instanceof String) {
ExecutionUtils.run(this, new RunnableEx() {
public void run() throws Exception {
setEdge(widget, (String) edge);
}
});
}
}
////////////////////////////////////////////////////////////////////////////
//
// Size
//
////////////////////////////////////////////////////////////////////////////
private static final DecimalFormat SIZE_FORMAT = new DecimalFormat("#.0",
new DecimalFormatSymbols(Locale.ENGLISH));
/**
* @return the current size of {@link WidgetInfo}, in units.
*/
private Double getSize(WidgetInfo widget) {
DocumentElement dockElement = widget.getElement().getParent();
Object value = getContext().getAttributeValue(dockElement, "size");
if (value instanceof Number) {
return ((Number) value).doubleValue();
}
return null;
}
public void setSize(WidgetInfo widget, double size) throws Exception {
DocumentElement dockElement = widget.getElement().getParent();
String sizeString = SIZE_FORMAT.format(size);
dockElement.setAttribute("size", sizeString);
}
public void setReasonableSize(WidgetInfo widget) throws Exception {
String edge = getEdge(widget);
if (!"CENTER".equals(edge)) {
double size = getReasonableSize(widget);
setSize(widget, size);
}
}
/**
* @return the size in units to use as reasonable size.
*/
private double getReasonableSize(WidgetInfo widget) {
String unit = getCurrentUnit().toString();
// special cases
if (unit.equals("CM")) {
return 1.0;
}
if (unit.equals("MM")) {
return 10.0;
}
if (unit.equals("IN")) {
return 1.0;
}
// generic case, use fixed pixels
boolean horizontal = isHorizontalEdge(widget);
return getSizeInUnits(100, horizontal);
}
public double getSizeInUnits(int pixels, boolean vertical) {
Object unit = getCurrentUnit();
return pixels / getUnitSize(unit, vertical);
}
public String getUnitSizeTooltip(double units) {
return SIZE_FORMAT.format(units) + getCurrentUnit().toString().toLowerCase();
}
/**
* @return the current "Unit", used in this panel.
*/
private Object getCurrentUnit() {
return ReflectionUtils.getFieldObject(getObject(), "unit");
}
/**
* @return the size of "Unit" in pixels.
*/
private double getUnitSize(Object unit, boolean vertical) {
Object layout = ReflectionUtils.getFieldObject(getObject(), "layout");
return (Double) ReflectionUtils.invokeMethodEx(
layout,
"getUnitSize(com.google.gwt.dom.client.Style.Unit,boolean)",
unit,
vertical);
}
////////////////////////////////////////////////////////////////////////////
//
// Clipboard
//
////////////////////////////////////////////////////////////////////////////
@Override
protected void clipboardCopy_addWidgetCommands(WidgetInfo widget, List<ClipboardCommand> commands)
throws Exception {
final String edge = getEdge(widget);
final Double size = getSize(widget);
commands.add(new PanelClipboardCommand<DockLayoutPanelInfo>(widget) {
private static final long serialVersionUID = 0L;
@Override
protected void add(DockLayoutPanelInfo panel, WidgetInfo widget) throws Exception {
panel.command_CREATE2(widget, null);
panel.setEdge(widget, edge);
if (size != null) {
panel.setSize(widget, size);
}
}
});
}
}