javafx.scene.control.Hyperlink Maven / Gradle / Ivy
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* Copyright (c) 2010, 2021, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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*/
package javafx.scene.control;
import javafx.beans.property.BooleanProperty;
import javafx.beans.property.BooleanPropertyBase;
import javafx.beans.value.WritableValue;
import javafx.event.ActionEvent;
import javafx.scene.AccessibleAttribute;
import javafx.scene.AccessibleRole;
import javafx.scene.Cursor;
import javafx.scene.Node;
import javafx.css.PseudoClass;
import javafx.scene.control.skin.HyperlinkSkin;
import javafx.css.StyleableProperty;
/**
* An HTML like label which can be a graphic and/or text which responds to rollovers and clicks.
* When a hyperlink is clicked/pressed {@link #isVisited} becomes {@code true}. A Hyperlink behaves
* just like a {@link Button}. When a hyperlink is pressed and released
* a {@link ActionEvent} is sent, and your application can perform some action based on this event.
*
*
* Example:
*
Hyperlink link = new Hyperlink("www.oracle.com");
*
* 
*
* @since JavaFX 2.0
*/
public class Hyperlink extends ButtonBase {
/* *************************************************************************
* *
* Constructors *
* *
**************************************************************************/
/**
* Creates a hyperlink with no label.
*/
public Hyperlink() {
initialize();
}
/**
* Create a hyperlink with the specified text as its label.
*
* @param text A text string for its label.
*/
public Hyperlink(String text) {
super(text);
initialize();
}
/**
* Create a hyperlink with the specified text and graphic as its label.
*
* @param text A text string for its label.
* @param graphic A graphic for its label
*/
public Hyperlink(String text, Node graphic) {
super(text, graphic);
initialize();
}
private void initialize() {
// Initialize the style class to be 'hyperlink'.
getStyleClass().setAll(DEFAULT_STYLE_CLASS);
setAccessibleRole(AccessibleRole.HYPERLINK);
// cursor is styleable through css. Calling setCursor
// makes it look to css like the user set the value and css will not
// override. Initializing cursor by calling applyStyle with null
// StyleOrigin ensures that css will be able to override the value.
((StyleableProperty)(WritableValue)cursorProperty()).applyStyle(null, Cursor.HAND);
}
/* *************************************************************************
* *
* Properties *
* *
**************************************************************************/
/**
* Indicates whether this link has already been "visited".
* @return true if this link has already been "visited"
*/
public final BooleanProperty visitedProperty() {
if (visited == null) {
visited = new BooleanPropertyBase() {
@Override protected void invalidated() {
pseudoClassStateChanged(PSEUDO_CLASS_VISITED, get());
}
@Override
public Object getBean() {
return Hyperlink.this;
}
@Override
public String getName() {
return "visited";
}
};
}
return visited;
}
private BooleanProperty visited;
public final void setVisited(boolean value) {
visitedProperty().set(value);
}
public final boolean isVisited() {
return visited == null ? false : visited.get();
}
/* *************************************************************************
* *
* Methods *
* *
**************************************************************************/
/**
* Implemented to invoke the {@link ActionEvent} if one is defined. This
* function will also {@link #setVisited} to true.
*/
@Override public void fire() {
if (!isDisabled()) {
// Avoid causing an exception in the case that visited was bound
if (visited == null || !visited.isBound()) {
setVisited(true);
}
fireEvent(new ActionEvent());
}
}
/** {@inheritDoc} */
@Override protected Skin createDefaultSkin() {
return new HyperlinkSkin(this);
}
/* *************************************************************************
* *
* Stylesheet Handling *
* *
**************************************************************************/
private static final String DEFAULT_STYLE_CLASS = "hyperlink";
private static final PseudoClass PSEUDO_CLASS_VISITED =
PseudoClass.getPseudoClass("visited");
/**
* Returns the initial cursor state of this control, for use
* by the JavaFX CSS engine to correctly set its initial value. This method
* is overridden to use the HAND cursor initially.
*
* @since 9
*/
@Override protected Cursor getInitialCursor() {
return Cursor.HAND;
}
/* *************************************************************************
* *
* Accessibility handling *
* *
**************************************************************************/
/** {@inheritDoc} */
@Override
public Object queryAccessibleAttribute(AccessibleAttribute attribute, Object... parameters) {
switch (attribute) {
case VISITED: return isVisited();
default: return super.queryAccessibleAttribute(attribute, parameters);
}
}
}
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