/*******************************************************************************
* Copyright (c) 2000, 2013 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.swt.widgets;
import javafx.scene.text.TextAlignment;
import org.eclipse.swt.SWT;
import org.eclipse.swt.SWTException;
import org.eclipse.swt.graphics.Image;
/**
* Instances of this class represent a non-selectable user interface object that
* displays a string or image. When SEPARATOR is specified, displays a single
* vertical or horizontal line.
* <p>
* Shadow styles are hints and may not be honored by the platform. To create a
* separator label with the default shadow style for the platform, do not
* specify a shadow style.
* </p>
* <dl>
* <dt><b>Styles:</b></dt>
* <dd>SEPARATOR, HORIZONTAL, VERTICAL</dd>
* <dd>SHADOW_IN, SHADOW_OUT, SHADOW_NONE</dd>
* <dd>CENTER, LEFT, RIGHT, WRAP</dd>
* <dt><b>Events:</b></dt>
* <dd>(none)</dd>
* </dl>
* <p>
* Note: Only one of SHADOW_IN, SHADOW_OUT and SHADOW_NONE may be specified.
* SHADOW_NONE is a HINT. Only one of HORIZONTAL and VERTICAL may be specified.
* Only one of CENTER, LEFT and RIGHT may be specified.
* </p>
* <p>
* IMPORTANT: This class is <em>not</em> intended to be subclassed.
* </p>
*
* @see <a href="http://www.eclipse.org/swt/snippets/#label">Label snippets</a>
* @see <a href="http://www.eclipse.org/swt/examples.php">SWT Example:
* ControlExample</a>
* @see <a href="http://www.eclipse.org/swt/">Sample code and further
* information</a>
* @noextend This class is not intended to be subclassed by clients.
*/
public class Label extends Control {
int alignment;
String text;
private Image image;
/**
* Constructs a new instance of this class given its parent and a style
* value describing its behavior and appearance.
* <p>
* The style value is either one of the style constants defined in class
* <code>SWT</code> which is applicable to instances of this class, or must
* be built by <em>bitwise OR</em>'ing together (that is, using the
* <code>int</code> "|" operator) two or more of those <code>SWT</code>
* style constants. The class description lists the style constants that are
* applicable to the class. Style bits are also inherited from superclasses.
* </p>
*
* @param parent
* a composite control which will be the parent of the new
* instance (cannot be null)
* @param style
* the style of control to construct
*
* @exception IllegalArgumentException
* <ul>
* <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
* </ul>
* @exception SWTException
* <ul>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the
* thread that created the parent</li>
* <li>ERROR_INVALID_SUBCLASS - if this class is not an
* allowed subclass</li>
* </ul>
*
* @see SWT#SEPARATOR
* @see SWT#HORIZONTAL
* @see SWT#VERTICAL
* @see SWT#SHADOW_IN
* @see SWT#SHADOW_OUT
* @see SWT#SHADOW_NONE
* @see SWT#CENTER
* @see SWT#LEFT
* @see SWT#RIGHT
* @see SWT#WRAP
* @see Widget#checkSubclass
* @see Widget#getStyle
*/
public Label(Composite parent, int style) {
super(parent, style);
javafx.scene.control.Label label = new javafx.scene.control.Label();
if ((style & SWT.SEPARATOR)!=0) alignment = SWT.NONE;
else {
if ((style & SWT.LEFT) != 0) {
alignment = SWT.LEFT;
label.setTextAlignment(TextAlignment.LEFT);
}
else if ((style & SWT.RIGHT) != 0) {
alignment = SWT.RIGHT;
label.setTextAlignment(TextAlignment.RIGHT);
}
else if ((style & SWT.CENTER) != 0) {
alignment = SWT.CENTER;
label.setTextAlignment(TextAlignment.CENTER);
}
}
setNode(label);
}
private javafx.scene.control.Label getNode() {
return (javafx.scene.control.Label)node;
}
/**
* Returns a value which describes the position of the text or image in the
* receiver. The value will be one of <code>LEFT</code>, <code>RIGHT</code>
* or <code>CENTER</code> unless the receiver is a <code>SEPARATOR</code>
* label, in which case, <code>NONE</code> is returned.
*
* @return the alignment
*
* @exception SWTException
* <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been
* disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the
* thread that created the receiver</li>
* </ul>
*/
public int getAlignment() {
return alignment;
}
/**
* Returns the receiver's image if it has one, or null if it does not.
*
* @return the receiver's image
*
* @exception SWTException
* <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been
* disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the
* thread that created the receiver</li>
* </ul>
*/
public Image getImage() {
return image;
}
/**
* Returns the receiver's text, which will be an empty string if it has
* never been set or if the receiver is a <code>SEPARATOR</code> label.
*
* @return the receiver's text
*
* @exception SWTException
* <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been
* disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the
* thread that created the receiver</li>
* </ul>
*/
public String getText() {
if ((getNode()==null) || ((style&SWT.SEPARATOR) != 0)) return "";
return getNode().getText()==null?"":getNode().getText();
}
/**
* Controls how text and images will be displayed in the receiver. The
* argument should be one of <code>LEFT</code>, <code>RIGHT</code> or
* <code>CENTER</code>. If the receiver is a <code>SEPARATOR</code> label,
* the argument is ignored and the alignment is not changed.
*
* @param alignment
* the new alignment
*
* @exception SWTException
* <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been
* disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the
* thread that created the receiver</li>
* </ul>
*/
public void setAlignment(int alignment) {
this.alignment = alignment;
switch (alignment){
case SWT.CENTER: getNode().setTextAlignment(TextAlignment.CENTER);
break;
case SWT.LEFT: getNode().setTextAlignment(TextAlignment.LEFT);
break;
case SWT.RIGHT: getNode().setTextAlignment(TextAlignment.RIGHT);
}
}
/**
* Sets the receiver's image to the argument, which may be null indicating
* that no image should be displayed.
*
* @param image
* the image to display on the receiver (may be null)
*
* @exception IllegalArgumentException
* <ul>
* <li>ERROR_INVALID_ARGUMENT - if the image has been
* disposed</li>
* </ul>
* @exception SWTException
* <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been
* disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the
* thread that created the receiver</li>
* </ul>
*/
public void setImage(Image image) {
// getNode().setGraphic(new ImageView(image.getImage()));
}
/**
* Sets the receiver's text.
* <p>
* This method sets the widget label. The label may include the mnemonic
* character and line delimiters.
* </p>
* <p>
* Mnemonics are indicated by an '&' that causes the next character to
* be the mnemonic. When the user presses a key sequence that matches the
* mnemonic, focus is assigned to the control that follows the label. On
* most platforms, the mnemonic appears underlined but may be emphasised in
* a platform specific manner. The mnemonic indicator character '&' can
* be escaped by doubling it in the string, causing a single '&' to be
* displayed.
* </p>
*
* @param string
* the new text
*
* @exception IllegalArgumentException
* <ul>
* <li>ERROR_NULL_ARGUMENT - if the text is null</li>
* </ul>
* @exception SWTException
* <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been
* disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the
* thread that created the receiver</li>
* </ul>
*/
public void setText(String string) {
getNode().setText(string);
}
}