bufferings.ktr.wjr.client.ui.WjrPopupPanel.java Source code

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Here is the source code for bufferings.ktr.wjr.client.ui.WjrPopupPanel.java

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/*
 * Copyright 2010 bufferings[at]gmail.com
 *
 * 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 bufferings.ktr.wjr.client.ui;

import static bufferings.ktr.wjr.client.ui.widget.JQueryUI.*;

import com.google.gwt.dom.client.Style.Position;
import com.google.gwt.user.client.DOM;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.HasText;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.RootPanel;

/**
 * The popup panel which is shown while the process is running.
 * 
 * @author bufferings[at]gmail.com
 */
public class WjrPopupPanel extends Composite implements HasText {

    /**
     * Whether the panel is showing or not.
     */
    protected boolean isShowing = false;

    /**
     * Whether the panel is hiding or not.
     */
    protected boolean isHiding = false;

    /**
     * The label.
     */
    protected Label label;

    /**
     * Constructs the WjrPopupPanel.
     */
    public WjrPopupPanel() {
        HorizontalPanel mainPanel = new HorizontalPanel();
        mainPanel.setHorizontalAlignment(HorizontalPanel.ALIGN_CENTER);
        mainPanel.setVerticalAlignment(HorizontalPanel.ALIGN_MIDDLE);
        mainPanel.setSpacing(5);
        mainPanel.setStyleName(UI_STATE_HIGHLIGHT);
        mainPanel.setSize("200px", "30px");
        mainPanel.setVisible(false);
        mainPanel.getElement().getStyle().setPosition(Position.ABSOLUTE);
        mainPanel.getElement().getStyle().setPropertyPx("left", -9999);
        mainPanel.getElement().setId(DOM.createUniqueId());

        label = new Label();
        label.setStyleName(UI_WIDGET);
        mainPanel.add(label);

        initWidget(mainPanel);
        RootPanel.get().add(this);
    }

    /**
     * Start showing the panel.
     */
    public void show() {
        if (isVisible() || isShowing) {
            return;
        }
        isShowing = true;
        adjustPosition();
        showAnimation(getElement().getId());
    }

    /**
     * Adjusts the position of the panel.
     */
    private void adjustPosition() {
        int left = 13;
        int top = (Window.getClientHeight() - 48);

        left += Window.getScrollLeft();
        top += Window.getScrollTop();

        getElement().getStyle().setPropertyPx("left", left);
        getElement().getStyle().setPropertyPx("top", top);
    }

    /**
     * The callback method of the showing jsni.
     */
    protected void showCallback() {
        isShowing = false;
    }

    /**
     * Start hiding the panel.
     */
    public void hide() {
        if (!isVisible() || isHiding) {
            return;
        }
        isHiding = true;
        hideAnimation(getElement().getId());
    }

    /**
     * The callback method of the hiding jsni.
     */
    protected void hideCallback() {
        isHiding = false;
    }

    /**
     * Starts the showing animation.
     * 
     * @param id
     *          The element id.
     */
    private native void showAnimation(String id)/*-{
                                                var options = {}
                                                var callback = this.@bufferings.ktr.wjr.client.ui.WjrPopupPanel::showCallback()();
                                                $wnd.$("#" + id).show('slide', options, 500, callback);
                                                }-*/;

    /**
     * Starts the hiding animation.
     * 
     * @param id
     *          The element id.
     */
    public native void hideAnimation(String id)/*-{
                                               var options = {}
                                               var callback = this.@bufferings.ktr.wjr.client.ui.WjrPopupPanel::hideCallback()();
                                               $wnd.$("#" + id).hide('slide', options, 500, callback);
                                               }-*/;

    /**
     * {@inheritDoc}
     */
    public String getText() {
        return label.getText();
    }

    /**
     * {@inheritDoc}
     */
    public void setText(String text) {
        label.setText(text);
    }
}