org.eclipse.swt.widgets.TaskItem Maven / Gradle / Ivy
/*******************************************************************************
* Copyright (c) 2000, 2016 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 org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.internal.cocoa.*;
/**
* Instances of this class represent a task item.
*
*
* - Styles:
* - (none)
* - Events:
* - (none)
*
*
* @see Sample code and further information
*
* @since 3.6
*
* @noextend This class is not intended to be subclassed by clients.
*/
public class TaskItem extends Item {
TaskBar parent;
Shell shell;
NSImage defaultImage;
int progress, iProgress, progressState = SWT.DEFAULT;
Image overlayImage;
String overlayText = "";
Menu menu;
static final int PROGRESS_MAX = 100;
static final int PROGRESS_TIMER = 350;
static final int PROGRESS_BARS = 7;
/**
* Constructs a new instance of this class given its parent
* (which must be a Tray) and a style value
* describing its behavior and appearance. The item is added
* to the end of the items maintained by its parent.
*
* The style value is either one of the style constants defined in
* class SWT which is applicable to instances of this
* class, or must be built by bitwise OR'ing together
* (that is, using the int "|" operator) two or more
* of those SWT style constants. The class description
* lists the style constants that are applicable to the class.
* Style bits are also inherited from superclasses.
*
*
* @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
* - ERROR_NULL_ARGUMENT - if the parent is null
*
* @exception SWTException
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent
* - ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass
*
*
* @see SWT
* @see Widget#checkSubclass
* @see Widget#getStyle
*/
TaskItem (TaskBar parent, int style) {
super (parent, style);
this.parent = parent;
parent.createItem (this, -1);
createWidget ();
}
@Override
protected void checkSubclass () {
if (!isValidSubclass ()) error (SWT.ERROR_INVALID_SUBCLASS);
}
@Override
void createWidget () {
NSApplication app = NSApplication.sharedApplication ();
NSImage image = app.applicationIconImage ();
defaultImage = new NSImage (image.copy ());
}
@Override
void destroyWidget () {
parent.destroyItem (this);
releaseHandle ();
}
/**
* Returns the receiver's pop up menu if it has one, or null
* if it does not.
*
* @return the receiver's menu
*
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
*
*/
public Menu getMenu () {
checkWidget ();
return menu;
}
/**
* Returns the receiver's overlay image if it has one, or null
* if it does not.
*
* @return the receiver's overlay image
*
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
*
*/
public Image getOverlayImage () {
checkWidget ();
return overlayImage;
}
/**
* Returns the receiver's overlay text, which will be an empty
* string if it has never been set.
*
* @return the receiver's overlay text
*
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
*
*/
public String getOverlayText () {
checkWidget ();
return overlayText;
}
/**
* Returns the receiver's parent, which must be a TaskBar.
*
* @return the receiver's parent
*
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
*
*
*/
public TaskBar getParent () {
checkWidget ();
return parent;
}
/**
* Returns the receiver's progress.
*
* @return the receiver's progress
*
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
*
*/
public int getProgress () {
checkWidget ();
return progress;
}
/**
* Returns the receiver's progress state.
*
* @return the receiver's progress state
*
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
*
*/
public int getProgressState () {
checkWidget ();
return progressState;
}
@Override
void releaseHandle () {
super.releaseHandle ();
parent = null;
if (defaultImage != null) defaultImage.release ();
defaultImage = null;
}
@Override
void releaseWidget () {
super.releaseWidget ();
overlayImage = null;
overlayText = null;
shell = null;
}
/**
* Sets the receiver's pop up menu to the argument. The way the menu is
* shown is platform specific.
*
*
* This feature might not be available for the receiver on all
* platforms. The application code can check if it is supported
* by calling the respective get method. When the feature is not
* available, the get method will always return the NULL.
*
*
* For better cross platform support, the application code should
* set this feature on the TaskItem for application.
* On Windows, this feature will only work on RCP applications.
*
*
* The menu should be fully created before this method is called.
* Dynamic changes to the menu after the method is called will not be reflected
* in the native menu.
*
* @param menu the new pop up menu
*
* @exception IllegalArgumentException
* - ERROR_MENU_NOT_POP_UP - the menu is not a pop up menu
* - ERROR_INVALID_ARGUMENT - if the menu has been disposed
*
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
*
*/
public void setMenu (Menu menu) {
checkWidget ();
if (menu != null) {
if (menu.isDisposed()) error(SWT.ERROR_INVALID_ARGUMENT);
if ((menu.style & SWT.POP_UP) == 0) {
error (SWT.ERROR_MENU_NOT_POP_UP);
}
}
this.menu = menu;
}
/**
* Sets the receiver's overlay image, which may be null
* indicating that no image should be displayed. The bounds
* for the overlay image is determined by the platform and in
* general it should be a small image.
*
*
* This feature might not be available for the receiver on all
* platforms. The application code can check if it is supported
* by calling the respective get method. When the feature is not
* available, the get method will always return the NULL.
*
*
* For better cross platform support, the application code should
* first try to set this feature on the TaskItem for the
* main shell then on the TaskItem for the application.
*
* @param overlayImage the new overlay image (may be null)
*
* @exception IllegalArgumentException
* - ERROR_INVALID_ARGUMENT - if the overlayImage has been disposed
*
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
*
*/
public void setOverlayImage (Image overlayImage) {
checkWidget ();
if (overlayImage != null && overlayImage.isDisposed ()) error (SWT.ERROR_INVALID_ARGUMENT);
this.overlayImage = overlayImage;
updateOverlayText (overlayImage != null ? null : overlayText);
updateImage ();
}
/**
* Sets the receiver's overlay text. The space available to display the
* overlay text is platform dependent and in general it should be no longer
* than a few characters.
*
*
* This feature might not be available for the receiver on all
* platforms. The application code can check if it is supported
* by calling the respective get method. When the feature is not
* available, the get method will always return an empty string.
*
*
* For better cross platform support, the application code should
* first try to set this feature on the TaskItem for the
* main shell then on the TaskItem for the application.
*
* @param overlayText the new overlay text
*
* @exception IllegalArgumentException
* - ERROR_NULL_ARGUMENT - if the overlayText is null
*
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
*
*/
public void setOverlayText (String overlayText) {
checkWidget ();
if (overlayText == null) error (SWT.ERROR_NULL_ARGUMENT);
this.overlayText = overlayText;
updateOverlayText (overlayText);
updateImage ();
}
/**
* Sets the receiver's progress, the progress represents a percentage and
* should be in range from 0 to 100. The progress is only shown when the progress
* state is different than SWT#DEFAULT.
*
*
* This feature might not be available for the receiver on all
* platforms. The application code can check if it is supported
* by calling the respective get method. When the feature is not
* available, the get method will always return zero.
*
*
* For better cross platform support, the application code should
* first try to set this feature on the TaskItem for the
* main shell then on the TaskItem for the application.
*
* @param progress the new progress
*
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
*
*
* #see {@link #setProgressState(int)}
*/
public void setProgress (int progress) {
checkWidget ();
progress = Math.max (0, Math.min (progress, PROGRESS_MAX));
if (this.progress == progress) return;
this.progress = progress;
updateImage ();
}
/**
* Sets the receiver's progress state, the state can be one of
* the following:
*
* - {@link SWT#DEFAULT}
* - {@link SWT#NORMAL}
* - {@link SWT#PAUSED}
* - {@link SWT#ERROR}
* - {@link SWT#INDETERMINATE}
*
*
* The percentage of progress shown by the states SWT#NORMAL, SWT#PAUSED,
* SWT#ERROR is set with setProgress().
* The state SWT#DEFAULT indicates that no progress should be shown.
*
*
* This feature might not be available for the receiver on all
* platforms. The application code can check if it is supported
* by calling the respective get method. When the feature is not
* available, the get method will always return SWT#DEFAULT.
*
*
* For better cross platform support, the application code should
* first try to set this feature on the TaskItem for the
* main shell then on the TaskItem for the application.
*
* @param progressState the new progress state
*
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
*
*
* #see {@link #setProgress(int)}
*/
public void setProgressState (int progressState) {
checkWidget ();
if (this.progressState == progressState) return;
this.progressState = progressState;
updateImage ();
}
void setShell (Shell shell) {
this.shell = shell;
shell.addListener (SWT.Dispose, event -> {
if (isDisposed ()) return;
dispose ();
});
}
void updateImage () {
boolean drawProgress = progress != 0 && progressState != SWT.DEFAULT;
boolean drawIntermidiate = progressState == SWT.INDETERMINATE;
NSApplication app = NSApplication.sharedApplication ();
NSDockTile dock = app.dockTile ();
boolean drawImage = overlayImage != null && dock.badgeLabel () == null;
if (!drawImage && !drawProgress && !drawIntermidiate) {
app.setApplicationIconImage (defaultImage);
return;
}
NSSize size = defaultImage.size ();
NSImage newImage = (NSImage)new NSImage().alloc ();
newImage = newImage.initWithSize (size);
NSBitmapImageRep rep = (NSBitmapImageRep)new NSBitmapImageRep ().alloc ();
rep = rep.initWithBitmapDataPlanes (0, (int)size.width, (int)size.height, 8, 4, true, false, OS.NSDeviceRGBColorSpace, OS.NSAlphaFirstBitmapFormat | OS.NSAlphaNonpremultipliedBitmapFormat, (int)size.width * 4, 32);
newImage.addRepresentation (rep);
rep.release ();
NSRect rect = new NSRect ();
rect.height = size.height;
rect.width = size.width;
newImage.lockFocus ();
defaultImage.drawInRect (rect, rect, OS.NSCompositeSourceOver, 1);
if (drawImage) {
NSImage badgetImage = overlayImage.handle;
NSSize badgeSize = badgetImage.size ();
NSRect srcRect = new NSRect ();
srcRect.height = badgeSize.height;
srcRect.width = badgeSize.width;
NSRect dstRect = new NSRect ();
dstRect.x = size.width / 2;
dstRect.height = size.height / 2;
dstRect.width = size.width / 2;
badgetImage.drawInRect(dstRect, srcRect, OS.NSCompositeSourceOver, 1);
}
if (drawIntermidiate || drawProgress) {
switch (progressState) {
case SWT.ERROR:
NSColor.colorWithDeviceRed (1, 0, 0, 0.6f).setFill ();
break;
case SWT.PAUSED:
NSColor.colorWithDeviceRed (1, 1, 0, 0.6f).setFill ();
break;
default:
NSColor.colorWithDeviceRed (1, 1, 1, 0.6f).setFill ();
}
rect.width = size.width / (PROGRESS_BARS * 2 - 1);
rect.height = size.height / 3;
int count;
if (drawIntermidiate) {
count = iProgress;
iProgress = (iProgress + 1) % (PROGRESS_BARS + 1);
getDisplay ().timerExec (PROGRESS_TIMER, () -> updateImage ());
} else {
count = progress * PROGRESS_BARS / PROGRESS_MAX;
}
for (int i = 0; i <= count; i++) {
rect.x = i * 2 * rect.width;
NSBezierPath.fillRect (rect);
}
}
newImage.unlockFocus ();
app.setApplicationIconImage (newImage);
newImage.release ();
}
void updateOverlayText (String string) {
NSApplication app = NSApplication.sharedApplication ();
NSDockTile dock = app.dockTile ();
if (string != null && string.length () > 0) {
dock.setBadgeLabel (NSString.stringWith (string));
} else {
dock.setBadgeLabel (null);
}
}
}