PaletteWidget.java

/*
 * Copyright 2009 Fred Sauer
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * 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 edu.purdue.pivot.skwiki.client.dnd;

import com.allen_sauer.gwt.dnd.client.HasDragHandle;
import com.google.gwt.user.client.ui.AbsolutePanel;
import com.google.gwt.user.client.ui.CheckBox;
import com.google.gwt.user.client.ui.FocusPanel;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.RadioButton;
import com.google.gwt.user.client.ui.Widget;

import edu.purdue.pivot.skwiki.client.editwindow.CanvasWindow;
import edu.purdue.pivot.skwiki.client.editwindow.TextWindow;

/**
 * Widget wrapper class used by {@link PalettePanel}.
 */
// public class PaletteWidget extends VerticalPanel implements HasDragHandle {
public class PaletteWidget extends AbsolutePanel implements HasDragHandle {

	private FocusPanel shim = new FocusPanel();

	private final Widget widget;
	public HTML header = new HTML("Sketch Editor");

	/**
	 * Default constructor to wrap the provided widget.
	 * 
	 * @param widget
	 *            the widget to be wrapped
	 */
	public PaletteWidget(Widget widget) {
		setSize("400px", "400px");
		this.widget = widget;

		// **** new from Dnd
		add(header, 0, 0);
		add(widget, 0, 25);

		// Add some CSS styling
		addStyleName("demo-PaletteWidget");
		widget.addStyleName("demo-PaletteWidget-widget");
		shim.addStyleName("demo-PaletteWidget-shim");
	}

	public PaletteWidget cloneWidget() {
		Widget clone;

		// Clone our internal widget
		if (widget instanceof Label) {
			Label label = (Label) widget;
			clone = new Label(label.getText());
		} else if (widget instanceof RadioButton) {
			RadioButton radioButton = (RadioButton) widget;
			clone = new RadioButton(radioButton.getName(),
					radioButton.getHTML(), true);
		} else if (widget instanceof CheckBox) {
			CheckBox checkBox = (CheckBox) widget;
			clone = new CheckBox(checkBox.getHTML(), true);
		} else if (widget instanceof TextWindow) {
			TextWindow editWindow = (TextWindow) widget;
			clone = new TextWindow();
		} else if (widget instanceof CanvasWindow) {
			CanvasWindow editWindow = (CanvasWindow) widget;
			clone = new CanvasWindow();
		} else {
			throw new IllegalStateException("Unhandled Widget class "
					+ widget.getClass().getName());
		}

		// Copy a few obvious common widget properties
		clone.setStyleName(widget.getStyleName());
		clone.setTitle(widget.getTitle());

		// Wrap the cloned widget in a new PaletteWidget instance
		return new PaletteWidget(clone);
	}

	@Override
	public Widget getDragHandle() {
		return shim;
	}

	/**
	 * Adjust the shim size and attach once our widget dimensions are known.
	 */
	@Override
	protected void onLoad() {
		super.onLoad();
		shim.setPixelSize(getOffsetWidth(), getOffsetHeight());
		// **** new to DND
		add(shim, 0, 0);
		// add(shim);
	}

	/**
	 * Remove the shim to allow the widget to size itself when reattached.
	 */
	@Override
	protected void onUnload() {
		super.onUnload();
		shim.removeFromParent();
	}

	/**
	 * Let shim size match our size.
	 * 
	 * @param width
	 *            the desired pixel width
	 * @param height
	 *            the desired pixel height
	 */
	@Override
	public void setPixelSize(int width, int height) {
		super.setPixelSize(width, height);
		shim.setPixelSize(width, height);
	}

	/**
	 * Let shim size match our size.
	 * 
	 * @param width
	 *            the desired CSS width
	 * @param height
	 *            the desired CSS height
	 */
	@Override
	public void setSize(String width, String height) {
		super.setSize(width, height);
		shim.setSize(width, height);
	}

}