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/*******************************************************************************
* Copyright (c) 2004 - 2006 Mylar committers 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
*******************************************************************************/
package org.eclipse.mylar.internal.tasks.ui.views;
import java.util.Arrays;
import org.eclipse.mylar.context.core.ContextCorePlugin;
import org.eclipse.mylar.internal.tasks.ui.TaskListPreferenceConstants;
import org.eclipse.mylar.internal.tasks.ui.TasksUiImages;
import org.eclipse.mylar.tasks.core.AbstractRepositoryTask;
import org.eclipse.mylar.tasks.core.AbstractTaskContainer;
import org.eclipse.mylar.tasks.core.ITask;
import org.eclipse.mylar.tasks.core.ITaskListElement;
import org.eclipse.mylar.tasks.core.AbstractRepositoryTask.RepositoryTaskSyncState;
import org.eclipse.mylar.tasks.ui.TasksUiPlugin;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
/**
* @author Mik Kersten
*/
class CustomTaskListDecorationDrawer implements Listener {
private final TaskListView taskListView;
private int activationImageOffset;
private Image taskActive = TasksUiImages.getImage(TasksUiImages.TASK_ACTIVE);
private Image taskInactive = TasksUiImages.getImage(TasksUiImages.TASK_INACTIVE);
private Image taskInactiveContext = TasksUiImages.getImage(TasksUiImages.TASK_INACTIVE_CONTEXT);
// see bug 185004
private int platformSpecificSquish = 0;
CustomTaskListDecorationDrawer(TaskListView taskListView, int activationImageOffset) {
this.taskListView = taskListView;
this.activationImageOffset = activationImageOffset;
this.taskListView.synchronizationOverlaid = TasksUiPlugin.getDefault().getPluginPreferences().getBoolean(
TaskListPreferenceConstants.INCOMING_OVERLAID);
if (SWT.getPlatform().equals("gtk")) {
platformSpecificSquish = 8;
} else if (SWT.getPlatform().equals("carbon")) {
platformSpecificSquish = 3;
}
}
/*
* 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();
ITask task = null;
Image activationImage = null;
if (data instanceof ITask) {
task = (ITask) data;
}
if (task != null) {
if (task.isActive()) {
activationImage = taskActive;
} else if (ContextCorePlugin.getContextManager().hasContext(task.getHandleIdentifier())) {
activationImage = taskInactiveContext;
} else {
activationImage = taskInactive;
}
}
if (data instanceof ITaskListElement) {
switch (event.type) {
case SWT.EraseItem: {
if (activationImage != null) {
drawActivationImage(activationImageOffset, event, activationImage);
}
if (!this.taskListView.synchronizationOverlaid) {
if (data instanceof ITaskListElement) {
drawSyncronizationImage((ITaskListElement) data, event);
}
}
break;
}
case SWT.PaintItem: {
if (activationImage != null) {
drawActivationImage(activationImageOffset, event, activationImage);
}
if (data instanceof ITaskListElement) {
drawSyncronizationImage((ITaskListElement) data, event);
}
break;
}
}
}
}
private void drawSyncronizationImage(ITaskListElement element, Event event) {
Image image = null;
int offsetX = 6;
int offsetY = (event.height / 2) - 5;
if (taskListView.synchronizationOverlaid) {
offsetX = event.x + 18 - platformSpecificSquish;
offsetY += 2;
}
if (element instanceof AbstractTaskContainer) {
if (element instanceof AbstractTaskContainer) {
if (!Arrays.asList(this.taskListView.getViewer().getExpandedElements()).contains(element)
&& hasIncoming((AbstractTaskContainer) element)) {
int additionalSquish = 0;
if (platformSpecificSquish > 0 && taskListView.synchronizationOverlaid) {
additionalSquish = platformSpecificSquish + 3;
} else if (platformSpecificSquish > 0) {
additionalSquish = platformSpecificSquish / 2;
}
if (taskListView.synchronizationOverlaid) {
image = TasksUiImages.getImage(TasksUiImages.OVERLAY_SYNCH_INCOMMING);
offsetX = 42 - additionalSquish;
} else {
image = TasksUiImages.getImage(TasksUiImages.OVERLAY_INCOMMING);
offsetX = 24 - additionalSquish;
}
}
}
} else {
image = TasksUiImages.getImage(TaskElementLabelProvider.getSynchronizationImageDescriptor(element,
taskListView.synchronizationOverlaid));
}
if (image != null) {
event.gc.drawImage(image, offsetX, event.y + offsetY);
}
}
private boolean hasIncoming(AbstractTaskContainer container) {
for (ITask task : container.getChildren()) {
if (task instanceof AbstractRepositoryTask) {
AbstractRepositoryTask containedRepositoryTask = (AbstractRepositoryTask) task;
if (containedRepositoryTask.getSyncState() == RepositoryTaskSyncState.INCOMING) {
return true;
}
}
}
// if (container instanceof AbstractRepositoryQuery) {
// AbstractRepositoryQuery query = (AbstractRepositoryQuery) container;
// for (AbstractRepositoryTask hit : query.getHits()) {
// if (hit.getSyncState() == RepositoryTaskSyncState.INCOMING) {
// return true;
// }
// }
// }
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);
}
}
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