package fan.tutorial.client.ui.btn;

import com.extjs.gxt.ui.client.Style.HorizontalAlignment;
import com.extjs.gxt.ui.client.event.ButtonEvent;
import com.extjs.gxt.ui.client.event.SelectionListener;
import com.extjs.gxt.ui.client.util.IconHelper;
import com.extjs.gxt.ui.client.widget.Html;
import com.extjs.gxt.ui.client.widget.LayoutContainer;
import com.extjs.gxt.ui.client.widget.Window;
import com.extjs.gxt.ui.client.widget.button.Button;
import com.extjs.gxt.ui.client.widget.layout.FitLayout;
import com.google.gwt.user.client.Element;

public class ButtonExample extends LayoutContainer {

    @Override
    protected void onRender(Element parent, int index) {
        super.onRender(parent, index);
        final Window win = new Window();
        win.setHeadingHtml("Button Example");
        win.setSize(450, 400);
        win.setShadow(false);
        win.setMaximizable(false);
        win.setLayout(new FitLayout());
        win.add(new Html("<p style='font-size:28px;padding:15px;'>This is a example.</p>"));
        
        //創建按鈕, 并給按鈕設置圖標
        Button saveButton = new Button("保存", IconHelper.createStyle("save-icon"));
        //為按鈕添加監聽事件
        saveButton.addSelectionListener(new SelectionListener<ButtonEvent>() {
            @Override
            public void componentSelected(ButtonEvent ce) {
                //do something
                win.hide();
            }
        });
        //設置窗口按鈕的對齊方式
        win.setButtonAlign(HorizontalAlignment.RIGHT);
        //為窗口添加按鈕組件
        win.addButton(saveButton);
        win.addButton(new Button("取消"));
        
        win.show();
    }
}

.save-icon {
    background: url("../resources/images/save.png");
}