/*
 * Copyright 2010 Daniel Kurka
 * 
 * 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 com.googlecode.mgwt.ui.client.dialog;

import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.FlowPanel;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.HasHTML;
import com.google.gwt.user.client.ui.HasWidgets;
import com.googlecode.mgwt.dom.client.event.tap.HasTapHandlers;
import com.googlecode.mgwt.ui.client.MGWTStyle;
import com.googlecode.mgwt.ui.client.theme.base.DialogCss;
import com.googlecode.mgwt.ui.client.widget.base.ButtonBase;

/**
 * A dialog panel with title, text, ok and cancel button
 * 
 * @author Daniel Kurka
 */
public class DialogPanel extends Composite {
  private static class CancelButton extends ButtonBase {

    public CancelButton(DialogCss css, String text) {
      super(css);
      setText(text);
      addStyleName(css.cancelbutton());

    }

  }

  private static class OkButton extends ButtonBase {

    public OkButton(DialogCss css, String text) {

      super(css);
      setText(text);
      addStyleName(css.okbutton());

    }

  }

  private FlowPanel main;
  private FlowPanel container;
  private HTML title;
  private FlowPanel content;
  private FlowPanel buttonContainer;
  private OkButton okButton;
  private CancelButton cancelButton;
  private final DialogCss css;

  /**
   * Construct the panel
   */
  public DialogPanel() {
    this(MGWTStyle.getTheme().getMGWTClientBundle().getDialogCss());
  }

  /**
   * Construct panel with a special css
   * 
   * @param css the css to use
   */
  public DialogPanel(DialogCss css) {
    this.css = css;
    this.css.ensureInjected();
    main = new FlowPanel();
    initWidget(main);

    main.addStyleName(css.getDialogPanel());

    container = new FlowPanel();
    container.addStyleName(css.container());

    main.add(container);

    title = new HTML();
    title.addStyleName(css.title());
    container.add(title);

    content = new FlowPanel();
    content.addStyleName(css.content());
    container.add(content);

    buttonContainer = new FlowPanel();
    buttonContainer.addStyleName(css.footer());
    container.add(buttonContainer);

    okButton = new OkButton(css, "Ok");

    buttonContainer.add(okButton);

    cancelButton = new CancelButton(css, "Cancel");

    buttonContainer.add(cancelButton);

  }

  /**
   * get the container of the panel
   * 
   * @return the container of the dialog panel
   */
  public HasWidgets getContent() {
    return content;
  }

  /**
   * get {@link HasTapHandlers} for the cancel button
   * 
   * @return the {@link HasTapHandlers} for cancel button
   */
  public HasTapHandlers getCancelButton() {
    return cancelButton;
  }

  /**
   * get {@link HasTapHandlers} for the ok button
   * 
   * @return the {@link HasTapHandlers} for ok button
   */
  public HasTapHandlers getOkButton() {
    return okButton;
  }

  public void setOkButtonText(String text) {
    this.okButton.setText(text);
  }

  public void setCancelButtonText(String text) {
    this.cancelButton.setText(text);
  }

  /**
   * show the cancel button
   * 
   * @param show true to show, otherwise hidden
   */
  public void showCancelButton(boolean show) {
    if (show) {
      int widgetCount = buttonContainer.getWidgetCount();
      if (widgetCount == 0) {
        buttonContainer.add(cancelButton);
      }
    } else {
      buttonContainer.remove(cancelButton);
    }
  }

  /**
   * show the ok button
   * 
   * @param show true to show, otherwise hidden
   */
  public void showOkButton(boolean show) {
    if (show) {
      buttonContainer.insert(okButton, 0);
    } else {
      buttonContainer.remove(okButton);
    }
  }

  /**
   * Get the title of the dialog
   * 
   * @return the title of the dialog
   */
  public HasHTML getDialogTitle() {
    return title;
  }

}