/*
* Copyright (c) 2004-2011 Marco Maccaferri 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:
* Marco Maccaferri - initial API and implementation
*/
package org.eclipsetrader.ui.internal.views;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.StructuredViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipsetrader.core.views.ISessionData;
import org.eclipsetrader.core.views.IView;
import org.eclipsetrader.core.views.IViewChangeListener;
import org.eclipsetrader.core.views.IViewItem;
import org.eclipsetrader.core.views.ViewEvent;
import org.eclipsetrader.core.views.ViewItemDelta;
public class ViewContentProvider implements ITreeContentProvider {
private static final int FADE_TIMER = 500;
private Viewer viewer;
private Object[] rootItems;
private IViewChangeListener listener = new IViewChangeListener() {
@Override
public void viewChanged(ViewEvent event) {
final ViewItemDelta[] deltas = event.getDelta();
if (!viewer.getControl().isDisposed()) {
try {
viewer.getControl().getDisplay().asyncExec(new Runnable() {
@Override
public void run() {
if (viewer.getControl().isDisposed()) {
return;
}
boolean needRefresh = false;
for (ViewItemDelta delta : deltas) {
if (delta.getKind() == ViewItemDelta.ADDED || delta.getKind() == ViewItemDelta.REMOVED) {
needRefresh = true;
break;
}
}
for (ViewItemDelta delta : deltas) {
if (delta.getKind() == ViewItemDelta.CHANGED) {
IAdaptable[] oldValues = delta.getOldValues();
IAdaptable[] newValues = delta.getNewValues();
IViewItem viewItem = delta.getViewItem();
ISessionData data = (ISessionData) viewItem.getAdapter(ISessionData.class);
if (data != null) {
int[] timers = (int[]) data.getData(ViewItemLabelProvider.K_FADE_LEVELS);
if (timers == null || timers.length != newValues.length) {
timers = new int[newValues.length];
data.setData(ViewItemLabelProvider.K_FADE_LEVELS, timers);
}
if (oldValues.length != newValues.length) {
for (int i = 0; i < timers.length; i++) {
timers[i] = 6;
}
if (!needRefresh) {
((StructuredViewer) viewer).update(viewItem, null);
}
}
else {
for (int i = 0; i < timers.length; i++) {
if (!(oldValues[i] == newValues[i] || oldValues[i] != null && oldValues[i].equals(newValues[i]))) {
timers[i] = 6;
}
}
if (!needRefresh) {
((StructuredViewer) viewer).update(viewItem, null);
}
}
}
}
}
if (needRefresh) {
viewer.refresh();
}
}
});
} catch (Exception e) {
// Do nothing
}
}
}
};
private Runnable fadeUpdateRunnable = new Runnable() {
@Override
public void run() {
if (!viewer.getControl().isDisposed()) {
viewer.getControl().setRedraw(false);
try {
for (Object item : rootItems) {
IViewItem viewItem = (IViewItem) item;
ISessionData data = (ISessionData) viewItem.getAdapter(ISessionData.class);
if (data != null) {
int[] timers = (int[]) data.getData(ViewItemLabelProvider.K_FADE_LEVELS);
if (timers != null) {
boolean needUpdate = false;
for (int i = 0; i < timers.length; i++) {
if (timers[i] > 0) {
timers[i]--;
needUpdate = true;
}
}
if (needUpdate) {
((StructuredViewer) viewer).update(item, null);
}
}
}
}
} finally {
viewer.getControl().setRedraw(true);
}
viewer.getControl().getDisplay().timerExec(FADE_TIMER, fadeUpdateRunnable);
}
}
};
public ViewContentProvider() {
}
/* (non-Javadoc)
* @see org.eclipse.jface.viewers.IStructuredContentProvider#getElements(java.lang.Object)
*/
@Override
public Object[] getElements(Object inputElement) {
if (inputElement instanceof IView) {
rootItems = ((IView) inputElement).getItems();
}
else {
rootItems = new Object[0];
}
return rootItems;
}
/* (non-Javadoc)
* @see org.eclipse.jface.viewers.ITreeContentProvider#getChildren(java.lang.Object)
*/
@Override
public Object[] getChildren(Object parentElement) {
if (parentElement instanceof IViewItem) {
return ((IViewItem) parentElement).getItems();
}
return new Object[0];
}
/* (non-Javadoc)
* @see org.eclipse.jface.viewers.ITreeContentProvider#getParent(java.lang.Object)
*/
@Override
public Object getParent(Object element) {
if (element instanceof IViewItem) {
return ((IViewItem) element).getParent();
}
return null;
}
/* (non-Javadoc)
* @see org.eclipse.jface.viewers.ITreeContentProvider#hasChildren(java.lang.Object)
*/
@Override
public boolean hasChildren(Object element) {
if (element instanceof IViewItem) {
return ((IViewItem) element).getItemCount() != 0;
}
return false;
}
/* (non-Javadoc)
* @see org.eclipse.jface.viewers.IContentProvider#dispose()
*/
@Override
public void dispose() {
}
/* (non-Javadoc)
* @see org.eclipse.jface.viewers.IContentProvider#inputChanged(org.eclipse.jface.viewers.Viewer, java.lang.Object, java.lang.Object)
*/
@Override
public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
this.viewer = viewer;
if (oldInput instanceof IView) {
((IView) oldInput).removeViewChangeListener(listener);
}
if (newInput instanceof IView) {
((IView) newInput).addViewChangeListener(listener);
}
if (viewer != null && !viewer.getControl().isDisposed()) {
viewer.getControl().getDisplay().timerExec(FADE_TIMER, fadeUpdateRunnable);
}
}
protected String[] getUpdatedProperties(IViewItem viewItem, IAdaptable[] oldValues, IAdaptable[] newValues) {
ISessionData data = (ISessionData) viewItem.getAdapter(ISessionData.class);
if (data != null) {
int[] timers = (int[]) data.getData(ViewItemLabelProvider.K_FADE_LEVELS);
if (timers == null || timers.length != newValues.length) {
timers = new int[newValues.length];
data.setData(ViewItemLabelProvider.K_FADE_LEVELS, timers);
}
if (oldValues.length != newValues.length) {
for (int i = 0; i < timers.length; i++) {
timers[i] = 6;
}
return null;
}
else {
String[] properties = new String[timers.length];
for (int i = 0; i < timers.length; i++) {
if (!(oldValues[i] == newValues[i] || oldValues[i] != null && oldValues[i].equals(newValues[i]))) {
timers[i] = 6;
properties[i] = String.valueOf(i);
}
}
return properties;
}
}
return null;
}
}