org.eclipse.jface.viewers.ViewerLabel Maven / Gradle / Ivy
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/*******************************************************************************
* Copyright (c) 2004, 2015 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
* Tom Schindl - tooltip support
*******************************************************************************/
package org.eclipse.jface.viewers;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.Point;
/**
* The ViewerLabel is the class that is passed to a viewer to handle updates of
* labels. It keeps track of both original and updates text.
*
* @see IViewerLabelProvider
* @since 3.0
*/
public class ViewerLabel {
// New values for the receiver. Null if nothing has been set.
private String newText = null;
private Image newImage = null;
private boolean imageUpdated = false;
private boolean textUpdated = false;
private Color background = null;
private Color foreground = null;
private Font font = null;
// The initial values for the receiver.
private String startText;
private Image startImage;
private boolean hasPendingDecorations;
private String tooltipText;
private Color tooltipForegroundColor;
private Color tooltipBackgroundColor;
private Point tooltipShift;
/**
* Create a new instance of the receiver with the supplied initial text and
* image.
*
* @param initialText initial text
* @param initialImage initial image
*/
public ViewerLabel(String initialText, Image initialImage) {
startText = initialText;
startImage = initialImage;
}
/**
* Get the image for the receiver. If the new image has been set return it,
* otherwise return the starting image.
*
* @return Returns the image.
*/
public final Image getImage() {
if (imageUpdated) {
return newImage;
}
return startImage;
}
/**
* Set the image for the receiver.
*
* @param image
* The image to set.
*/
public final void setImage(Image image) {
imageUpdated = true;
newImage = image;
}
/**
* Get the text for the receiver. If the new text has been set return it,
* otherwise return the starting text.
*
* @return String or null if there was no initial text and
* nothing was updated.
*/
public final String getText() {
if (textUpdated) {
return newText;
}
return startText;
}
/**
* Set the text for the receiver.
*
* @param text
* String The label to set. This value should not be
* null.
* @see #hasNewText()
*/
public final void setText(String text) {
newText = text;
textUpdated = true;
}
/**
* Return whether or not the image has been set.
*
* @return boolean. true if the image has been set to
* something new.
*
* @since 3.1
*/
public boolean hasNewImage() {
// If we started with null any change is an update
if (startImage == null) {
return newImage != null;
}
if (imageUpdated) {
return !(startImage.equals(newImage));
}
return false;
}
/**
* Return whether or not the text has been set.
*
* @return boolean. true if the text has been set to
* something new.
*/
public boolean hasNewText() {
// If we started with null any change is an update
if (startText == null) {
return newText != null;
}
if (textUpdated) {
return !(startText.equals(newText));
}
return false;
}
/**
* Return whether or not the background color has been set.
*
* @return boolean. true if the value has been set.
*/
public boolean hasNewBackground() {
return background != null;
}
/**
* Return whether or not the foreground color has been set.
*
* @return boolean. true if the value has been set.
*
* @since 3.1
*/
public boolean hasNewForeground() {
return foreground != null;
}
/**
* Return whether or not the font has been set.
*
* @return boolean. true if the value has been set.
*
* @since 3.1
*/
public boolean hasNewFont() {
return font != null;
}
/**
* Get the background Color.
*
* @return Color or null if no new value was set.
*
* @since 3.1
*/
public Color getBackground() {
return background;
}
/**
* Set the background Color.
*
* @param background
* Color. This value should not be null.
*
* @since 3.1
*/
public void setBackground(Color background) {
this.background = background;
}
/**
* Get the font.
*
* @return Font or null if no new value was set.
*
* @since 3.1
*/
public Font getFont() {
return font;
}
/**
* Set the font.
*
* @param font
* Font This value should not be null.
*
* @since 3.1
*/
public void setFont(Font font) {
this.font = font;
}
/**
* Get the foreground Color.
*
* @return Color or null if no new value was set.
*
* @since 3.1
*/
public Color getForeground() {
return foreground;
}
/**
* Set the foreground Color.
*
* @param foreground
* Color This value should not be null.
*
* @since 3.1
*/
public void setForeground(Color foreground) {
this.foreground = foreground;
}
/**
* Set whether or not there are any decorations pending.
*/
void setHasPendingDecorations(boolean hasPendingDecorations) {
this.hasPendingDecorations = hasPendingDecorations;
}
/**
* @return boolean. true if there are any
* decorations pending.
*/
boolean hasPendingDecorations() {
return hasPendingDecorations;
}
/**
* Returns the tooltipText.
*
* @return {@link String} or null if the tool tip text was
* never set.
*
* @since 3.3
*/
public String getTooltipText() {
return tooltipText;
}
/**
* Set the tool tip text.
*
* @param tooltipText
* The tooltipText {@link String} to set. This value should not
* be null.
*
* @since 3.3
*/
public void setTooltipText(String tooltipText) {
this.tooltipText = tooltipText;
}
/**
* Return whether or not the tool tip text has been set.
*
* @return boolean. true if the tool tip text
* has been set.
*
* @since 3.3
*/
public boolean hasNewTooltipText() {
return this.tooltipText != null;
}
/**
* Return the tool tip background color.
*
* @return {@link Color} or null if the tool tip background
* color has not been set.
*
* @since 3.3
*/
public Color getTooltipBackgroundColor() {
return tooltipBackgroundColor;
}
/**
* Set the background {@link Color} for tool tip.
*
* @param tooltipBackgroundColor
* The {@link Color} to set. This value should not be
* null.
*
* @since 3.3
*/
public void setTooltipBackgroundColor(Color tooltipBackgroundColor) {
this.tooltipBackgroundColor = tooltipBackgroundColor;
}
/**
* Return whether or not the tool tip background color has been set.
*
* @return boolean. true if the tool tip text
* has been set.
*
* @since 3.3
*/
public boolean hasNewTooltipBackgroundColor() {
return tooltipBackgroundColor != null;
}
/**
* Return the foreground {@link Color}.
*
* @return Returns {@link Color} or null if the tool tip
* foreground color has not been set.
*
* @since 3.3
*/
public Color getTooltipForegroundColor() {
return tooltipForegroundColor;
}
/**
* Set the foreground {@link Color} for tool tip.
*
* @param tooltipForegroundColor
* The tooltipForegroundColor to set.
*
* @since 3.3
*/
public void setTooltipForegroundColor(Color tooltipForegroundColor) {
this.tooltipForegroundColor = tooltipForegroundColor;
}
/**
*
* Return whether or not the tool tip foreground color has been set.
*
* @return boolean. true if the tool tip foreground
* has been set.
*
* @since 3.3
*/
public boolean hasNewTooltipForegroundColor() {
return tooltipForegroundColor != null;
}
/**
* @return Returns the tooltipShift.
* @since 3.3
*/
public Point getTooltipShift() {
return tooltipShift;
}
/**
* @param tooltipShift
* The tooltipShift to set.
* @since 3.3
*/
public void setTooltipShift(Point tooltipShift) {
this.tooltipShift = tooltipShift;
}
/**
* @return Return whether or not the tool tip shift has been set.
* @since 3.3
*/
public boolean hasTooltipShift() {
return this.tooltipShift != null;
}
}