com.seanchenxi.gwt.ui.widget.MessageBox.java Source code

Introduction

Here is the source code for com.seanchenxi.gwt.ui.widget.MessageBox.java

Source

/*******************************************************************************
 * Copyright 2012 Xi CHEN
 *
 * 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.seanchenxi.gwt.ui.widget;

import com.google.gwt.core.client.GWT;
import com.google.gwt.core.client.Scheduler;
import com.google.gwt.core.client.Scheduler.ScheduledCommand;
import com.google.gwt.dom.client.Style.Unit;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.resources.client.ClientBundle;
import com.google.gwt.resources.client.CssResource;
import com.google.gwt.resources.client.ImageResource;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.DialogBox;
import com.google.gwt.user.client.ui.FlexTable;
import com.google.gwt.user.client.ui.FlowPanel;
import com.google.gwt.user.client.ui.HTMLTable.CellFormatter;
import com.google.gwt.user.client.ui.Image;

public class MessageBox {

    public interface Resources extends ClientBundle {
        @Source(Style.DEFAULT_CSS)
        Style messageBoxStyle();

        @Source("com/seanchenxi/gwt/ui/resource/image/messageBox/icon-error.gif")
        ImageResource icon_MsgBox_error();

        @Source("com/seanchenxi/gwt/ui/resource/image/messageBox/icon-info.gif")
        ImageResource icon_MsgBox_info();

        @Source("com/seanchenxi/gwt/ui/resource/image/messageBox/icon-question.gif")
        ImageResource icon_MsgBox_question();

        @Source("com/seanchenxi/gwt/ui/resource/image/messageBox/icon-warning.gif")
        ImageResource icon_MsgBox_warning();
    }

    @CssResource.ImportedWithPrefix("mb")
    public interface Style extends CssResource {
        String DEFAULT_CSS = "com/seanchenxi/gwt/ui/widget/MessageBox.css";

        int containerCellPadding();

        int containerCellSpacing();

        String containerWidth();

        String containerHeight();

        String messageBox();

        String messageBoxCaption();

        String messageBoxIconCell();

        String messageBoxButtonCell();
    }

    private final DialogBox dialog;
    private final FlexTable container;
    private final FlowPanel buttons;

    private static Resources defaultResources;

    private static Resources getDefaultResources() {
        if (defaultResources == null) {
            defaultResources = GWT.create(Resources.class);
        }
        return defaultResources;
    }

    private MessageBox() {
        buttons = new FlowPanel();

        container = new FlexTable();
        container.setSize(getResourceStyle().containerWidth(), getResourceStyle().containerHeight());
        container.setCellPadding(getResourceStyle().containerCellPadding());
        container.setCellSpacing(getResourceStyle().containerCellSpacing());

        CellFormatter cellFormatter = container.getCellFormatter();

        container.setHTML(0, 0, "");
        cellFormatter.getElement(0, 0).setClassName(getResourceStyle().messageBoxIconCell());
        container.setHTML(0, 1, "");

        container.setWidget(1, 0, buttons);
        container.getFlexCellFormatter().setColSpan(1, 0, 2);
        cellFormatter.getElement(1, 0).setClassName(getResourceStyle().messageBoxButtonCell());

        dialog = new DialogBox(false, true);
        dialog.setStyleName(getResourceStyle().messageBox());
        dialog.getCaption().asWidget().setStyleName(getResourceStyle().messageBoxCaption());
        dialog.setWidget(container);
    }

    private Style getResourceStyle() {
        final Style style = getDefaultResources().messageBoxStyle();
        style.ensureInjected();
        return style;
    }

    private void setTitle(String title) {
        dialog.setText(title);
    }

    private void setMessage(String message) {
        container.setHTML(0, 1, message);
    }

    private void setIcon(ImageResource icon) {
        container.setWidget(0, 0, new Image(icon));
    }

    private Button addButton(Button btn, final ScheduledCommand cmd) {
        btn.getElement().getStyle().setMargin(0, Unit.PX);
        btn.addClickHandler(new ClickHandler() {
            @Override
            public void onClick(ClickEvent event) {
                hide();
                if (cmd != null) {
                    Scheduler.get().scheduleDeferred(cmd);
                }
            }
        });
        buttons.add(btn);
        return btn;
    }

    public static void alert(String title, String message, ScheduledCommand cmd) {
        final MessageBox box = new MessageBox();
        box.setTitle(title);
        box.setMessage(message);
        box.setIcon(getDefaultResources().icon_MsgBox_warning());
        box.setSize("360px", "120px");
        Button ok = box.addButton(new Button("Ok"), cmd);
        box.container.setWidget(1, 0, ok); //Hook, cause, we only need one button here
        box.show();
    }

    private void setSize(String width, String height) {
        dialog.setSize(width, height);
    }

    public void show() {
        dialog.show();
        dialog.center();
    }

    public void hide() {
        dialog.hide();
    }

}