Home » Eclipse Projects » Rich Client Platform (RCP) » Binding multiple TreeViewers to single model(databinding problem)
 Binding multiple TreeViewers to single model [message #494579] |
Sat, 31 October 2009 17:28  |
 Sergey 
Messages: 6
Registered: October 2009 |
Junior Member |
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Hi all!
I have some problem with databinding.
I find standalone example how to bind TreeViewer to model... It works nice... but what if i have multiple TreeViews?
I have ViewPart with TreeView, wich can be opened multiple times, and i must find a simple solution to update all of them when some changes in model or one of TreeViewers occur.
I've utilized createPartControl method in my Viewer for this:
Entry input = Model.getInstance().getRootEntry();
viewer = new TreeViewer(parent, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL);
viewer.setUseHashlookup(true);
ViewerSupport.bind(viewer, input, BeanProperties.list("children", Entry.class), BeanProperties.value(Entry.class, "name"));
Realm realm = SWTObservables.getRealm(viewer.getControl().getDisplay());
ObservableListTreeContentProvider contentProvider = new ObservableListTreeContentProvider(BeanProperties.list("children",Entry.class).listFactory(realm), null);
if (viewer.getInput() != null)
viewer.setInput(null);
viewer.setContentProvider(contentProvider);
// viewer.setContentProvider(new DaysContentProvider(viewer));
viewer.setLabelProvider(new LabelProvider());
viewer.setInput(Model.getInstance().getRootEntry());
So it works only for one view, no changes in other! But why? Shuld i use different binding contexts and how can i do this?
Can someone help?
Thanks
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| Re: Binding multiple TreeViewers to single model [message #494581 is a reply to message #494579] |
Sat, 31 October 2009 17:35  |
Sergey
Messages: 6
Registered: October 2009 |
Junior Member |
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I modified snippet to try this out. But it doesnt work too.. 
package org.eclipse.jface.examples.databinding.snippets;
import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeSupport;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.core.databinding.beans.BeanProperties;
import org.eclipse.core.databinding.observable.Realm;
import org.eclipse.jface.databinding.swt.SWTObservables;
import org.eclipse.jface.databinding.viewers.ObservableListTreeContentProvider;
import org.eclipse.jface.databinding.viewers.ViewerSupport;
import org.eclipse.jface.viewers.ILabelProvider;
import org.eclipse.jface.viewers.ILabelProviderListener;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.layout.RowLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Tree;
import org.eclipse.swt.widgets.TreeItem;
import org.recaptool.business.Entry;
public class MySnippet {
private Shell shell;
private TreeViewer beanViewer;
private Tree tree;
private Bean input = createBean("input");
private static Bean createBean(String name) {
Bean input = new Bean(name);
for (int i = 0; i < 10; i++) {
List list = input.getList();
Bean root = new Bean("root");
ArrayList children = new ArrayList();
for(int j = 0; j < 3; j ++) {
Bean child = new Bean("root");
children.add(child);
}
root.setList(children);
list.add(root);
input.setList(list);
}
return input;
}
/**
* Launch the application
*
* @param args
*/
public static void main(String[] args) {
Display display = Display.getDefault();
Realm.runWithDefault(SWTObservables.getRealm(display), new Runnable() {
public void run() {
try {
MySnippet window = new MySnippet();
window.open();
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Open the window
*/
public void open() {
final Display display = Display.getDefault();
createContents();
shell.open();
shell.layout();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
}
private Bean getSelectedBean() {
IStructuredSelection selection = (IStructuredSelection) beanViewer
.getSelection();
if (selection.isEmpty())
return null;
return (Bean) selection.getFirstElement();
}
protected void createContents() {
shell = new Shell();
final GridLayout gridLayout_1 = new GridLayout();
gridLayout_1.numColumns = 2;
shell.setLayout(gridLayout_1);
shell.setSize(535, 397);
shell.setText("SWT Application");
final Composite group = new Composite(shell, SWT.NONE);
final RowLayout rowLayout = new RowLayout();
rowLayout.marginTop = 0;
rowLayout.marginRight = 0;
rowLayout.marginLeft = 0;
rowLayout.marginBottom = 0;
rowLayout.pack = false;
group.setLayout(rowLayout);
group
.setLayoutData(new GridData(SWT.FILL, SWT.FILL, false, false,
2, 1));
final Button addRootButton = new Button(group, SWT.NONE);
addRootButton.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(final SelectionEvent e) {
TreeItem selectedItem = beanViewer.getTree().getSelection()[0];
TreeItem parentItem = selectedItem.getParentItem();
Bean parent;
int index;
if (parentItem == null) {
parent = input;
index = beanViewer.getTree().indexOf(selectedItem);
} else {
parent = (Bean) parentItem.getData();
index = parentItem.indexOf(selectedItem);
}
List list = new ArrayList(parent.getList());
list.remove(index);
parent.setList(list);
}
});
addRootButton.setText("Delete");
// final Button setRoot = new Button(group, SWT.NONE);
// setRoot.addSelectionListener(new SelectionAdapter() {
// public void widgetSelected(final SelectionEvent e) {
// TreeItem selectedItem = beanViewer.getTree().getSelection()[0];
// beanViewer.setInput(selectedItem.getData());
// }
// });
// setRoot.setText("Set root");
beanViewer = new TreeViewer(shell, SWT.FULL_SELECTION | SWT.BORDER);
beanViewer.setUseHashlookup(true);
tree = beanViewer.getTree();
tree.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 2, 1));
ViewerSupport.bind(beanViewer, input, BeanProperties.list("list", Bean.class), BeanProperties.value(Bean.class, "text"));
Realm realm = SWTObservables.getRealm(beanViewer.getControl().getDisplay());
ObservableListTreeContentProvider contentProvider = new ObservableListTreeContentProvider(BeanProperties.list("list",Bean.class).listFactory(realm), null);
if (beanViewer.getInput() != null)
beanViewer.setInput(null);
beanViewer.setContentProvider(contentProvider);
beanViewer.setLabelProvider(new MyLabelProvider());
beanViewer.setInput(input);
TreeViewer beanViewer2 = new TreeViewer(shell, SWT.FULL_SELECTION | SWT.BORDER);
beanViewer2.setUseHashlookup(true);
tree = beanViewer2.getTree();
tree.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 2, 1));
ViewerSupport.bind(beanViewer2, input, BeanProperties.list("list", Bean.class), BeanProperties.value(Bean.class, "text"));
if (beanViewer2.getInput() != null)
beanViewer2.setInput(null);
beanViewer2.setContentProvider(contentProvider);
beanViewer2.setLabelProvider(new MyLabelProvider());
// new MyLabelProvider(
// Properties.observeEach(contentProvider.getKnownElements(),
// new IValueProperty[] { BeanProperties.value(Bean.class, "text") }))
// );
beanViewer2.setInput(input);
}
class MyLabelProvider implements ILabelProvider {
@Override
public Image getImage(Object element) {
// Image im = new Image(MySnippet.this.shell.getDisplay(), "d:\\cd.png");
return null;
}
@Override
public String getText(Object element) {
return "blah";
}
@Override
public void addListener(ILabelProviderListener listener) {
// TODO Auto-generated method stub
}
@Override
public void dispose() {
// TODO Auto-generated method stub
}
@Override
public boolean isLabelProperty(Object element, String property) {
// TODO Auto-generated method stub
return false;
}
@Override
public void removeListener(ILabelProviderListener listener) {
// TODO Auto-generated method stub
}
}
static class Bean {
/* package */PropertyChangeSupport changeSupport = new PropertyChangeSupport(
this);
private String text;
private List list;
public Bean(String text) {
this.text = text;
list = new ArrayList();
}
public void addPropertyChangeListener(PropertyChangeListener listener) {
changeSupport.addPropertyChangeListener(listener);
}
public void removePropertyChangeListener(PropertyChangeListener listener) {
changeSupport.removePropertyChangeListener(listener);
}
public String getText() {
return text;
}
public void setText(String value) {
changeSupport.firePropertyChange("text", this.text,
this.text = value);
}
public List getList() {
if (list == null)
return null;
return new ArrayList(list);
}
public void setList(List list) {
if (list != null)
list = new ArrayList(list);
changeSupport.firePropertyChange("list", this.list,
this.list = list);
}
public boolean hasListeners(String propertyName) {
return changeSupport.hasListeners(propertyName);
}
}
}
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| Re: Binding multiple TreeViewers to single model [message #494694 is a reply to message #494581] |
Mon, 02 November 2009 08:56 |
Sergey
Messages: 6
Registered: October 2009 |
Junior Member |
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Solved it. Here is modifyed snippet. It has some bugs, but i did it only for databindig test.
package org.eclipse.jface.examples.databinding.snippets;
import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeSupport;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
import org.eclipse.core.databinding.beans.BeanProperties;
import org.eclipse.core.databinding.observable.Realm;
import org.eclipse.core.databinding.observable.value.IObservableValue;
import org.eclipse.core.databinding.property.Properties;
import org.eclipse.core.databinding.property.list.IListProperty;
import org.eclipse.core.databinding.property.value.IValueProperty;
import org.eclipse.jface.databinding.swt.SWTObservables;
import org.eclipse.jface.databinding.viewers.ObservableListTreeContentProvider;
import org.eclipse.jface.databinding.viewers.ObservableMapLabelProvider;
import org.eclipse.jface.databinding.viewers.ViewerSupport;
import org.eclipse.jface.viewers.AbstractTreeViewer;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.layout.RowLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
import org.eclipse.swt.widgets.Tree;
import org.eclipse.swt.widgets.TreeItem;
public class Snippet019TreeViewerWithListFactory {
private Button pasteButton;
private Button copyButton;
private Shell shell;
private Button addChildBeanButton;
private Button removeBeanButton;
private Tree tree;
private Text beanText;
private TreeViewer v2;
private TreeViewer v1;
private Bean input = createBean("input");
private IObservableValue clipboard;
/**
* Launch the application
*
* @param args
*/
public static void main(String[] args) {
Display display = Display.getDefault();
Realm.runWithDefault(SWTObservables.getRealm(display), new Runnable() {
public void run() {
try {
Snippet019TreeViewerWithListFactory window = new Snippet019TreeViewerWithListFactory();
window.open();
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Open the window
*/
public void open() {
final Display display = Display.getDefault();
createContents();
shell.open();
shell.layout();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
}
/**
* Create contents of the window
*/
protected void createContents() {
shell = new Shell();
final GridLayout gridLayout_1 = new GridLayout();
gridLayout_1.numColumns = 2;
shell.setLayout(gridLayout_1);
shell.setSize(535, 397);
shell.setText("SWT Application");
final Composite group = new Composite(shell, SWT.NONE);
final RowLayout rowLayout = new RowLayout();
rowLayout.marginTop = 0;
rowLayout.marginRight = 0;
rowLayout.marginLeft = 0;
rowLayout.marginBottom = 0;
rowLayout.pack = false;
group.setLayout(rowLayout);
group.setLayoutData(new GridData(SWT.FILL, SWT.FILL, false, false, 2, 1));
final Button addRootButton = new Button(group, SWT.NONE);
addRootButton.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(final SelectionEvent e) {
List list = input.getList();
Bean root = createBean("root");
list.add(root);
input.setList(list);
lastSelectedTreeViewer.setSelection(new StructuredSelection(root));
beanText.selectAll();
beanText.setFocus();
}
});
addRootButton.setText("Add Root");
addChildBeanButton = new Button(group, SWT.NONE);
addChildBeanButton.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(final SelectionEvent e) {
Bean parent = getSelectedBean();
List list = new ArrayList(parent.getList());
Bean child = new Bean("child");
list.add(child);
parent.setList(list);
lastSelectedTreeViewer.setSelection(new StructuredSelection(child));
beanText.selectAll();
beanText.setFocus();
}
});
addChildBeanButton.setText("Add Child");
removeBeanButton = new Button(group, SWT.NONE);
removeBeanButton.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(final SelectionEvent e) {
TreeItem selectedItem = lastSelectedTree.getSelection()[0];
TreeItem parentItem = selectedItem.getParentItem();
Bean parent;
int index;
if (parentItem == null) {
parent = input;
index = lastSelectedTree.indexOf(selectedItem);
} else {
parent = (Bean) parentItem.getData();
index = parentItem.indexOf(selectedItem);
}
List list = new ArrayList(parent.getList());
list.remove(index);
parent.setList(list);
}
});
removeBeanButton.setText("Remove");
copyButton = new Button(group, SWT.NONE);
copyButton.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(final SelectionEvent e) {
clipboard.setValue(getSelectedBean());
}
});
copyButton.setText("Copy");
pasteButton = new Button(group, SWT.NONE);
pasteButton.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(final SelectionEvent e) {
Bean copy = (Bean) clipboard.getValue();
if (copy == null)
return;
Bean parent = getSelectedBean();
if (parent == null)
parent = input;
List list = new ArrayList(parent.getList());
list.add(copy);
parent.setList(list);
lastSelectedTreeViewer.setSelection(new StructuredSelection(copy));
beanText.selectAll();
beanText.setFocus();
}
});
pasteButton.setText("Paste");
final Button refreshButton = new Button(group, SWT.NONE);
refreshButton.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(final SelectionEvent e) {
lastSelectedTreeViewer.refresh();
}
});
refreshButton.setText("Refresh");
v2 = createTreeViewer();
v1 = createTreeViewer();
final Label itemNameLabel = new Label(shell, SWT.NONE);
itemNameLabel.setText("Item Name");
beanText = new Text(shell, SWT.BORDER);
final GridData gd_beanValue = new GridData(SWT.FILL, SWT.CENTER, true, false);
beanText.setLayoutData(gd_beanValue);
initExtraBindings(v2);
initSelectionListeners(v2);
initExtraBindings(v1);
initSelectionListeners(v1);
}
private static Bean createBean(String name) {
Bean root = new Bean("root");
List rootList = root.getList();
for (int i = 0; i < 10; i++) {
Bean bean = new Bean("bean" + i);
List list = bean.getList();
for (int j = 0; j < 3; j++) {
list.add(new Bean("child" + j));
}
bean.setList(list);
rootList.add(bean);
}
root.setList(rootList);
return root;
}
private TreeViewer createTreeViewer() {
TreeViewer viewer;
viewer = new TreeViewer(shell, SWT.FULL_SELECTION | SWT.BORDER);
viewer.setUseHashlookup(true);
tree = viewer.getTree();
tree.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 2, 1));
return viewer;
}
private Bean selection;
private Tree lastSelectedTree;
private TreeViewer lastSelectedTreeViewer;
private void initSelectionListeners(final TreeViewer v) {
v.addSelectionChangedListener(new ISelectionChangedListener() {
@Override
public void selectionChanged(SelectionChangedEvent event) {
lastSelectedTree = v.getTree();
lastSelectedTreeViewer = v;
if (event.getSelection() instanceof IStructuredSelection) {
IStructuredSelection s = (IStructuredSelection) event.getSelection();
if (s.getFirstElement() instanceof Bean) {
selection = (Bean) s.getFirstElement();
}
}
}
});
// initial values. ugly, but its just workaround snippet :)
lastSelectedTree = v.getTree();
lastSelectedTreeViewer = v;
}
private Bean getSelectedBean() {
return selection;
}
public static void bind(AbstractTreeViewer viewer, Object input, IListProperty childrenProperty, IValueProperty labelProperty) {
bind(viewer, input, childrenProperty, new IValueProperty[] { labelProperty });
}
public static void bind(AbstractTreeViewer viewer, Object input, IListProperty childrenProperty, IValueProperty[] labelProperties) {
Realm realm = SWTObservables.getRealm(viewer.getControl().getDisplay());
ObservableListTreeContentProvider contentProvider = new ObservableListTreeContentProvider(childrenProperty.listFactory(realm), null);
if (viewer.getInput() != null)
viewer.setInput(null);
viewer.setContentProvider(contentProvider);
viewer.setLabelProvider(new ObservableMapLabelProvider(Properties.observeEach(contentProvider.getKnownElements(), labelProperties)));
if (input != null)
viewer.setInput(input);
}
private void initExtraBindings(TreeViewer viewer) {
ViewerSupport.bind(viewer, input, BeanProperties.list("list", Bean.class), BeanProperties.value(Bean.class, "text"));
}
static class Bean {
/* package */PropertyChangeSupport changeSupport = new PropertyChangeSupport(this);
private String text;
private LinkedList list;
public Bean(String text) {
this.text = text;
list = new LinkedList();
}
public void addPropertyChangeListener(PropertyChangeListener listener) {
changeSupport.addPropertyChangeListener(listener);
}
public void removePropertyChangeListener(PropertyChangeListener listener) {
changeSupport.removePropertyChangeListener(listener);
}
public String getText() {
return text;
}
public void setText(String value) {
changeSupport.firePropertyChange("text", this.text, this.text = value);
}
public List getList() {
if (list == null)
return null;
return new ArrayList(list);
}
public void setList(List list) {
if (list != null)
list = new LinkedList(list);
changeSupport.firePropertyChange("list", this.list, this.list = (LinkedList) list);
}
public boolean hasListeners(String propertyName) {
return changeSupport.hasListeners(propertyName);
}
}
}
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