org.controlsfx.control.HyperlinkLabel Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of controlsfx Show documentation
High quality UI controls and other tools to complement the core JavaFX distribution
There is a newer version: 11.2.1
/**
 * Copyright (c) 2013, 2019, ControlsFX
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 *     * Neither the name of ControlsFX, any associated website, nor the
 * names of its contributors may be used to endorse or promote products
 * derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL CONTROLSFX BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.controlsfx.control;

import impl.org.controlsfx.skin.HyperlinkLabelSkin;
import javafx.beans.property.ObjectProperty;
import javafx.beans.property.SimpleObjectProperty;
import javafx.beans.property.SimpleStringProperty;
import javafx.beans.property.StringProperty;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.event.EventTarget;
import javafx.scene.control.Hyperlink;
import javafx.scene.control.Skin;

/**
 * A UI control that will convert the given text into a series of text labels
 * and {@link Hyperlink hyperlinks}, based on the use of delimiter characters
 * to specify where hyperlinks should appear. The delimiter characters are 
 * square braces (that is, [ and ]). To create a hyperlink in a string you would
 * therefore do something like 
 * hyperlinkLabel.setText("Click [here] for more information!");,
 * with the word 'here' appearing as a hyperlink that a use may click. This 
 * approach therefore allows for hyperlinks to be easily embedded within a 
 * label.
 * 
 * Once hyperlinks have been declared in a text string, it is necessary to
 * respond to the user interacting with the hyperlink (most commonly via mouse
 * clicks). To do so, you register a single event handler for action events on
 * the HyperlinkLabel instance, and then determine what to do within that 
 * callback. For example:
 * 
 * 
 * {@code
 * hyperlinkLabel.setOnAction(new EventHandler() {
 *     public void handle(ActionEvent event) {
 *         Hyperlink link = (Hyperlink)event.getSource();
 *         final String str = link == null ? "" : link.getText();
 *         switch(str) {
 *             case "here": // do 'here' action
 *                          break;
 *             case "exit": // do exit action
 *                          break;
 *         }
 *     }
 * });}
 * 
 * This simple single-handler approach was chosen over any more complex 
 * per-hyperlink solution because it is anticipated that most use cases will 
 * normally consist of one, or very few hyperlinks, and it was therefore unlikely
 * that the increased API complexity would be warranted.
 * 
 * 
Screenshot
 * To demonstrate what a HyperlinkLabel looks like, refer to the screenshot
 * below, when the text 
 * "Hello [world]! I [wonder] what hyperlink [you] [will] [click]"
 * was passed in to the HyperlinkLabel instance:
 * 
 * 


 * 

 * 
 * @see Hyperlink
 * @see ActionEvent
 */
public class HyperlinkLabel extends ControlsFXControl implements EventTarget {
    
    /***************************************************************************
     * 
     * Private fields
     * 
     **************************************************************************/
    

    
    /***************************************************************************
     * 
     * Constructors
     * 
     **************************************************************************/
    
    /**
     * Creates an empty HyperlinkLabel instance with no {@link #textProperty() text}
     * specified.
     */
    public HyperlinkLabel() {
        this(null);
    }
    
    /**
     * Creates a HyperlinkLabel instance with the given text value used as the 
     * initial text.
     * 
     * @param text The text to display to the user.
     */
    public HyperlinkLabel(String text) {
        setText(text);
    }
    
    
    
    /**************************************************************************
     * 
     * Public API
     * 
     **************************************************************************/
    
    /**
     * {@inheritDoc}
     */
    @Override protected Skin createDefaultSkin() {
        return new HyperlinkLabelSkin(this);
    }
    
    
    // --- text
    private final StringProperty text = new SimpleStringProperty(this, "text"); //$NON-NLS-1$
    
    /**
     * Return a {@link StringProperty} representing the text being displayed.
     * @return a {@link StringProperty}.
     */
    public final StringProperty textProperty() { 
        return text; 
    }
    
    /**
     * Return the text currently displayed.
     * @return the text currently displayed.
     */
    public final String getText() {
        return text.get();
    }
    
    /**
     * Set a new text to display to the user, using the delimiter characters [ and ]
     * to indicate where hyperlinks should be displayed.
     * @param value 
     */
    public final void setText(String value) {
        text.set(value);
    }
    
    
    // --- onAction
    private ObjectProperty> onAction;
    
    /**
     * The action, which is invoked whenever a hyperlink is fired. This
     * may be due to the user clicking on the hyperlink with the mouse, or by
     * a touch event, or by a key press.
     * @return an {@link ObjectProperty} representing the action.
     */
    public final ObjectProperty> onActionProperty() {
        if (onAction == null) {
            onAction = new SimpleObjectProperty>(this, "onAction") { //$NON-NLS-1$
                @Override protected void invalidated() {
                    setEventHandler(ActionEvent.ACTION, get());
                }
            };
        }
        return onAction;
    }

    /**
     * Sets a new EventHandler which will be invoked whenever a hyperlink is 
     * fired.
     * @param value 
     */
    public final void setOnAction(EventHandler value) {
        onActionProperty().set( value);
    }

    /**
     * 
     * @return the action, which is invoked whenever a hyperlink is fired.
     */
    public final EventHandler getOnAction() {
        return onAction == null ? null : onAction.get();
    }
}