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/*******************************************************************************
* Copyright (c) 2004, 2010 Tasktop Technologies 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:
* Tasktop Technologies - initial API and implementation
* Frank Becker - fixes for bug 169916
*******************************************************************************/
package org.eclipse.mylyn.internal.tasks.ui.views;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.mylyn.context.core.ContextCore;
import org.eclipse.mylyn.internal.provisional.commons.ui.CommonFonts;
import org.eclipse.mylyn.internal.provisional.commons.ui.CommonImages;
import org.eclipse.mylyn.internal.tasks.core.AbstractTask;
import org.eclipse.mylyn.internal.tasks.core.RepositoryQuery;
import org.eclipse.mylyn.internal.tasks.core.TaskCategory;
import org.eclipse.mylyn.internal.tasks.core.UnmatchedTaskContainer;
import org.eclipse.mylyn.internal.tasks.ui.AbstractTaskListFilter;
import org.eclipse.mylyn.internal.tasks.ui.ITasksUiPreferenceConstants;
import org.eclipse.mylyn.internal.tasks.ui.TasksUiPlugin;
import org.eclipse.mylyn.internal.tasks.ui.util.PlatformUtil;
import org.eclipse.mylyn.tasks.core.IRepositoryQuery;
import org.eclipse.mylyn.tasks.core.ITask;
import org.eclipse.mylyn.tasks.core.ITaskContainer;
import org.eclipse.mylyn.tasks.core.ITask.SynchronizationState;
import org.eclipse.mylyn.tasks.ui.TasksUiImages;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.TreeItem;
/**
* @author Mik Kersten
* @author Frank Becker
*/
public class CustomTaskListDecorationDrawer implements Listener {
private final int activationImageOffset;
private final Image taskActive = CommonImages.getImage(TasksUiImages.CONTEXT_ACTIVE);
private final Image taskInactive = CommonImages.getImage(TasksUiImages.CONTEXT_INACTIVE_EMPTY);
private final Image taskInactiveContext = CommonImages.getImage(TasksUiImages.CONTEXT_INACTIVE);
// see bug 185004
private final int platformSpecificSquish;
private final Rectangle lastClippingArea;
private final boolean tweakClipping;
private boolean useStrikethroughForCompleted;
private boolean synchronizationOverlaid;
private boolean focusedMode;
private final org.eclipse.jface.util.IPropertyChangeListener PROPERTY_LISTENER = new org.eclipse.jface.util.IPropertyChangeListener() {
public void propertyChange(org.eclipse.jface.util.PropertyChangeEvent event) {
if (event.getProperty().equals(ITasksUiPreferenceConstants.USE_STRIKETHROUGH_FOR_COMPLETED)) {
if (event.getNewValue() instanceof Boolean) {
useStrikethroughForCompleted = (Boolean) event.getNewValue();
}
} else if (event.getProperty().equals(ITasksUiPreferenceConstants.OVERLAYS_INCOMING_TIGHT)) {
if (event.getNewValue() instanceof Boolean) {
synchronizationOverlaid = (Boolean) event.getNewValue();
}
}
}
};
public CustomTaskListDecorationDrawer(int activationImageOffset, boolean focusedMode) {
this.activationImageOffset = activationImageOffset;
this.lastClippingArea = new Rectangle(0, 0, 0, 0);
this.tweakClipping = PlatformUtil.isPaintItemClippingRequired();
this.platformSpecificSquish = PlatformUtil.getTreeItemSquish();
this.synchronizationOverlaid = TasksUiPlugin.getDefault().getPreferenceStore().getBoolean(
ITasksUiPreferenceConstants.OVERLAYS_INCOMING_TIGHT);
this.useStrikethroughForCompleted = TasksUiPlugin.getDefault().getPreferenceStore().getBoolean(
ITasksUiPreferenceConstants.USE_STRIKETHROUGH_FOR_COMPLETED);
this.focusedMode = focusedMode;
TasksUiPlugin.getDefault().getPreferenceStore().addPropertyChangeListener(PROPERTY_LISTENER);
}
/*
* NOTE: MeasureItem, PaintItem and EraseItem are called repeatedly.
* Therefore, it is critical for performance that these methods be as
* efficient as possible.
*/
public void handleEvent(Event event) {
Object data = event.item.getData();
Image activationImage = null;
if (data instanceof ITask) {
AbstractTask task = (AbstractTask) data;
if (task.isActive()) {
activationImage = taskActive;
} else if (ContextCore.getContextManager().hasContext(task.getHandleIdentifier())) {
activationImage = taskInactiveContext;
} else {
activationImage = taskInactive;
}
}
if (!CommonFonts.HAS_STRIKETHROUGH) {
if (data instanceof AbstractTask & useStrikethroughForCompleted) {
AbstractTask task = (AbstractTask) data;
if (task.isCompleted()) {
Rectangle bounds;
//if (isCOCOA) {
bounds = ((TreeItem) event.item).getTextBounds(0);
// } else {
// bounds = ((TreeItem) event.item).getBounds();
// }
int lineY = bounds.y + (bounds.height / 2);
String itemText = ((TreeItem) event.item).getText();
Point extent = event.gc.textExtent(itemText);
event.gc.drawLine(bounds.x, lineY, bounds.x + extent.x, lineY);
}
}
}
if (data instanceof ITaskContainer) {
switch (event.type) {
case SWT.EraseItem: {
// if ("gtk".equals(SWT.getPlatform())) { //$NON-NLS-1$
// // GTK requires drawing on erase event so that images don't disappear when selected.
// if (activationImage != null) {
// drawActivationImage(activationImageOffset, event, activationImage);
// }
// if (!this.synchronizationOverlaid) {
// if (data instanceof ITaskContainer) {
// drawSyncronizationImage((ITaskContainer) data, event);
// }
// }
// }
// TODO: would be nice not to do this on each item's painting
// String text = tree.getFilterControl().getText();
// if (text != null && !text.equals("") && tree.getViewer().getExpandedElements().length <= 12) {
// int offsetY = tree.getViewer().getExpandedElements().length * tree.getViewer().getTree().getItemHeight();
// event.gc.drawText("Open search dialog...", 20, offsetY - 10);
// }
if (tweakClipping) {
lastClippingArea.x = event.x;
lastClippingArea.y = event.y;
lastClippingArea.width = event.width;
lastClippingArea.height = event.height;
}
break;
}
case SWT.PaintItem: {
Rectangle clipping = null;
if (tweakClipping) {
// GTK requires setting the clipping from the erase event so that images can be drawn to the left of the content area
clipping = event.gc.getClipping();
event.gc.setClipping(lastClippingArea);
}
if (activationImage != null) {
drawActivationImage(activationImageOffset, event, activationImage);
}
if (data instanceof ITaskContainer) {
drawSyncronizationImage((ITaskContainer) data, event);
}
if (tweakClipping) {
event.gc.setClipping(clipping);
}
break;
}
}
}
}
private void drawSyncronizationImage(ITaskContainer element, Event event) {
Image image = null;
int offsetX = PlatformUtil.getIncomingImageOffset();
int offsetY = (event.height / 2) - 5;
if (synchronizationOverlaid) {
offsetX = event.x + 18 - platformSpecificSquish;
offsetY += 2;
}
if (element != null) {
if (element instanceof ITask) {
image = CommonImages.getImage(getSynchronizationImageDescriptor(element, synchronizationOverlaid));
} else {
int imageOffset = 0;
if (!hideDecorationOnContainer(element, (TreeItem) event.item)
&& AbstractTaskListFilter.hasDescendantIncoming(element)) {
if (synchronizationOverlaid) {
image = CommonImages.getImage(CommonImages.OVERLAY_SYNC_OLD_INCOMMING);
} else {
image = CommonImages.getImage(CommonImages.OVERLAY_SYNC_INCOMMING);
}
} else if (element instanceof IRepositoryQuery) {
RepositoryQuery query = (RepositoryQuery) element;
if (query.getStatus() != null) {
image = CommonImages.getImage(CommonImages.OVERLAY_SYNC_WARNING);
if (synchronizationOverlaid) {
imageOffset = 11;
} else {
imageOffset = 3;
}
}
}
int additionalSquish = 0;
if (platformSpecificSquish > 0 && synchronizationOverlaid) {
additionalSquish = platformSpecificSquish + 3;
} else if (platformSpecificSquish > 0) {
additionalSquish = platformSpecificSquish / 2;
}
if (synchronizationOverlaid) {
offsetX = 42 - imageOffset - additionalSquish;
} else {
offsetX = 24 - imageOffset - additionalSquish;
}
}
}
if (image != null) {
event.gc.drawImage(image, offsetX, event.y + offsetY);
}
}
private boolean hideDecorationOnContainer(ITaskContainer element, TreeItem treeItem) {
if (element instanceof UnmatchedTaskContainer) {
if (!focusedMode) {
return false;
} else if (AbstractTaskListFilter.hasDescendantIncoming(element)) {
return true;
}
} else if (element instanceof IRepositoryQuery) {
RepositoryQuery query = (RepositoryQuery) element;
if (query.getStatus() != null) {
return true;
}
}
if (focusedMode) {
return false;
} else if (element instanceof IRepositoryQuery || element instanceof TaskCategory) {
return treeItem.getExpanded();
} else {
return false;
}
}
private void drawActivationImage(final int activationImageOffset, Event event, Image image) {
Rectangle rect = image.getBounds();
int offset = Math.max(0, (event.height - rect.height) / 2);
event.gc.drawImage(image, activationImageOffset, event.y + offset);
}
private ImageDescriptor getSynchronizationImageDescriptor(Object element, boolean synchViewStyle) {
if (element instanceof ITask) {
ITask repositoryTask = (ITask) element;
if (repositoryTask.getSynchronizationState() == SynchronizationState.INCOMING_NEW) {
if (synchViewStyle) {
return CommonImages.OVERLAY_SYNC_OLD_INCOMMING_NEW;
} else {
return CommonImages.OVERLAY_SYNC_INCOMMING_NEW;
}
} else if (repositoryTask.getSynchronizationState() == SynchronizationState.OUTGOING_NEW) {
if (synchViewStyle) {
return CommonImages.OVERLAY_SYNC_OLD_OUTGOING;
} else {
return CommonImages.OVERLAY_SYNC_OUTGOING_NEW;
}
}
ImageDescriptor imageDescriptor = null;
if (repositoryTask.getSynchronizationState() == SynchronizationState.OUTGOING
|| repositoryTask.getSynchronizationState() == SynchronizationState.OUTGOING_NEW) {
if (synchViewStyle) {
imageDescriptor = CommonImages.OVERLAY_SYNC_OLD_OUTGOING;
} else {
imageDescriptor = CommonImages.OVERLAY_SYNC_OUTGOING;
}
} else if (repositoryTask.getSynchronizationState() == SynchronizationState.INCOMING) {
if (synchViewStyle) {
imageDescriptor = CommonImages.OVERLAY_SYNC_OLD_INCOMMING;
} else {
imageDescriptor = CommonImages.OVERLAY_SYNC_INCOMMING;
}
} else if (repositoryTask.getSynchronizationState() == SynchronizationState.CONFLICT) {
imageDescriptor = CommonImages.OVERLAY_SYNC_CONFLICT;
}
if (imageDescriptor == null && repositoryTask instanceof AbstractTask
&& ((AbstractTask) repositoryTask).getStatus() != null) {
return CommonImages.OVERLAY_SYNC_WARNING;
} else if (imageDescriptor != null) {
return imageDescriptor;
}
} else if (element instanceof IRepositoryQuery) {
RepositoryQuery query = (RepositoryQuery) element;
if (query.getStatus() != null) {
return CommonImages.OVERLAY_SYNC_WARNING;
}
}
// HACK: need a proper blank image
return CommonImages.OVERLAY_CLEAR;
}
public void dispose() {
TasksUiPlugin.getDefault().getPreferenceStore().removePropertyChangeListener(PROPERTY_LISTENER);
}
public void setUseStrikethroughForCompleted(boolean useStrikethroughForCompleted) {
this.useStrikethroughForCompleted = useStrikethroughForCompleted;
}
public void setSynchronizationOverlaid(boolean synchronizationOverlaid) {
this.synchronizationOverlaid = synchronizationOverlaid;
}
public boolean isFocusedMode() {
return focusedMode;
}
public void setFocusedMode(boolean focusedMode) {
this.focusedMode = focusedMode;
}
}
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