Java Code Examples for com.codename1.ui.events.ActionListener#actionPerformed()

/**
 * Shows the search bar manually which is useful for use cases of popping 
 * up search from code
 * 
 * @param callback gets the search string callbacks
 */
public void showSearchBar(final ActionListener callback) {        
    SearchBar s = new SearchBar(Toolbar.this, searchIconSize) {

        @Override
        public void onSearch(String text) {
            callback.actionPerformed(new ActionEvent(text));
        }

    };
    Form f = (Form) Toolbar.this.getComponentForm();
    setHidden(true);
    f.removeComponentFromForm(Toolbar.this);
    f.setToolbar(s);
    s.initSearchBar();
    if(f == Display.INSTANCE.getCurrent()) {
        f.animateLayout(100);
    }
}
 

/**
 * Creates a new command instance that encapsulates the action listener and details, the main
 * value of this approach is in our ability to write commands using the shorthand lambda syntax
 * of Java 8.
 * @param name the name/title of the command
 * @param icon the icon for the command
 * @param ev the even handler
 * @return a newly created Command instance
 */
public static Command create(String name, Image icon, final ActionListener ev) {
    Command cmd = new Command(name) {
        @Override
        public void actionPerformed(ActionEvent evt) {
            ev.actionPerformed(evt);
        }
    };
    cmd.setIcon(icon);
    return cmd;
}
 

/**
 * Creates a new command instance that encapsulates the action listener and details, the main
 * value of this approach is in our ability to write commands using the shorthand lambda syntax
 * of Java 8.
 * @param name the name/title of the command
 * @param icon the icon for the command
 * @param ev the even handler
 * @return a newly created Command instance
 * @since 6.0
 */
public static Command createMaterial(String name, char icon, final ActionListener ev) {
    Command cmd = new Command(name) {
        @Override
        public void actionPerformed(ActionEvent evt) {
            ev.actionPerformed(evt);
        }
    };
    cmd.setMaterialIcon(icon);
    return cmd;
}
 

/**
 * Constructs an image request that will automatically populate the given Label
 * when the response arrives, it will cache the file locally.
 *
 * @param url the image URL
 * @param callback the callback that should be updated when the data arrives
 * @param destFile local file to store the data into the given path
 */
public static void createImageToFileSystem(String url, ActionListener callback, String destFile) {

    Image im = cacheImage(null, false, destFile, null, null, defaultMaintainAspectRatio);
    if (im != null) {
        callback.actionPerformed(new NetworkEvent(null, im));
        return;
    }
    //image not found on cache go and download from the url
    ImageDownloadService i = new ImageDownloadService(url, callback);
    i.cacheImages = true;
    i.destinationFile = destFile;
    i.setFailSilently(true);
    NetworkManager.getInstance().addToQueue(i);
}
 

/**
 * Constructs an image request that will automatically populate the given Label
 * when the response arrives, it will cache the file locally.
 *
 * @param url the image URL
 * @param callback the callback that should be updated when the data arrives
 * @param cacheId a unique identifier to be used to store the image into storage
 * @param keep if set to true keeps the file in RAM once loaded
 */
public static void createImageToStorage(String url, ActionListener callback, String cacheId, boolean keep) {

    Image im = cacheImage(cacheId, keep, null, null, null, defaultMaintainAspectRatio);
    if (im != null) {
        callback.actionPerformed(new NetworkEvent(null, im));
        return;
    }
    //image not found on cache go and download from the url
    ImageDownloadService i = new ImageDownloadService(url, callback);
    i.cacheImages = true;
    i.cacheId = cacheId;
    i.setFailSilently(true);
    NetworkManager.getInstance().addToQueue(i);
}