src/com/vaadin/tests/book/WindowOpener.java


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/* 
@ITMillApache2LicenseForJavaFiles@
 */

package com.vaadin.tests.book;

import com.vaadin.ui.Button;
import com.vaadin.ui.CustomComponent;
import com.vaadin.ui.Label;
import com.vaadin.ui.VerticalLayout;
import com.vaadin.ui.Window;
import com.vaadin.ui.Window.CloseEvent;

/** Component contains a button that allows opening a window. */
public class WindowOpener extends CustomComponent implements
        Window.CloseListener {
    Window mainwindow; // Reference to main window
    Window mywindow; // The window to be opened
    Button openbutton; // Button for opening the window
    Button closebutton; // A button in the window
    Label explanation; // A descriptive text

    public WindowOpener(String label, Window main) {
        mainwindow = main;

        /* The component consists of a button that opens the window. */
        final VerticalLayout layout = new VerticalLayout();

        openbutton = new Button("Open Window", this, "openButtonClick");
        explanation = new Label("Explanation");
        layout.addComponent(openbutton);
        layout.addComponent(explanation);

        setCompositionRoot(layout);
    }

    /** Handle the clicks for the two buttons. */
    public void openButtonClick(Button.ClickEvent event) {
        /* Create a new window. */
        mywindow = new Window("My Dialog");
        mywindow.setPositionX(200);
        mywindow.setPositionY(100);
        mywindow.getLayout().setSizeUndefined();

        /* Add the window inside the main window. */
        mainwindow.addWindow(mywindow);

        /* Listen for close events for the window. */
        mywindow.addListener(this);

        /* Add components in the window. */
        mywindow.addComponent(new Label("A text label in the window."));
        closebutton = new Button("Close", this, "closeButtonClick");
        mywindow.addComponent(closebutton);

        /* Allow opening only one window at a time. */
        openbutton.setEnabled(false);

        explanation.setValue("Window opened");
    }

    /** Handle Close button click and close the window. */
    public void closeButtonClick(Button.ClickEvent event) {
        /* Windows are managed by the application object. */
        mainwindow.removeWindow(mywindow);

        /* Return to initial state. */
        openbutton.setEnabled(true);

        explanation.setValue("Closed with button");
    }

    /** In case the window is closed otherwise. */
    public void windowClose(CloseEvent e) {
        /* Return to initial state. */
        openbutton.setEnabled(true);

        explanation.setValue("Closed with window controls");
    }
}