org.qipki.clients.web.client.ui.widgets.SidebarPanel.java Source code

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Here is the source code for org.qipki.clients.web.client.ui.widgets.SidebarPanel.java

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/*
 * Copyright (c) 2011, Paul Merlin. All Rights Reserved.
 *
 * 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 org.qipki.clients.web.client.ui.widgets;

import com.google.gwt.layout.client.Layout.AnimationCallback;
import com.google.gwt.layout.client.Layout.Layer;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.IsWidget;
import com.google.gwt.user.client.ui.ScrollPanel;
import com.google.gwt.user.client.ui.Widget;

public class SidebarPanel extends ScrollPanel {

    private final MainLayout mainLayout;
    private boolean active = false;

    public SidebarPanel(MainLayout mainLayout) {
        this.mainLayout = mainLayout;
    }

    @Override
    public void setWidget(IsWidget w) {
        final Widget widget = Widget.asWidgetOrNull(w);
        if (widget != getWidget()) {
            setHorizontalScrollPosition(0);
            setVerticalScrollPosition(0);
            boolean oldWidget = getWidget() != null;
            boolean newWidget = widget != null;
            if (oldWidget && newWidget) {
                // Replace
                //Window.alert( "replace" );
                setWidget(widget);
                mainLayout.setSidebarActivated(this, true, false, null);
            } else if (oldWidget) {
                // Hide
                //Window.alert( "hide" );
                setWidget(widget); // FIXME This statement should be in the animation complete callback
                mainLayout.setSidebarActivated(this, false, true, new AnimationCallback() {

                    @Override
                    public void onAnimationComplete() {
                    }

                    @Override
                    public void onLayout(Layer layer, double progress) {
                    }

                });
            } else if (newWidget) {
                // Show
                //Window.alert( "show" );
                setWidget(widget);
                mainLayout.setSidebarActivated(this, true, true, null);
            } else {
                // Should not happen
                Window.alert(
                        "SidebarPanel\n\n!oldWidget && !newWidget\nThis should not happen\n\nExpect bad layout behaviour!");
            }
        }
    }

    public boolean isActive() {
        return active;
    }

    public void setActive(boolean active) {
        this.active = active;
    }

}