/**
* The value of the given child entry has changed. Therefore we must set this change into our
* value objects.
*
* <p>We must inform our parent so that it can update its value objects
*
* <p>Subclasses may override to set the property value in some custom way.
*
* @param the child entry that changed its value
*/
protected void valueChanged(PropertySheetEntry child) {
for (int i = 0; i < values.length; i++) {
IPropertySource source = getPropertySource(values[i]);
source.setPropertyValue(child.getDescriptor().getId(), child.getEditValue(i));
} // inform our parent
if (parent != null) parent.valueChanged(this);
}
/**
* Update our value objects. We ask our parent for the property values based on our descriptor.
*/
private void refreshValues() {
// get our parent's value objects
Object[] sources = parent.getValues();
// loop through the objects getting our property value from each
Object[] newValues = new Object[sources.length];
for (int i = 0; i < sources.length; i++) {
IPropertySource source = parent.getPropertySource(sources[i]);
newValues[i] = source.getPropertyValue(descriptor.getId());
} // set our new values
setValues(newValues);
} /* (non-Javadoc)
/** Create our child entries. */
private void createChildEntries() {
// get the current descriptors
List descriptors = computeMergedPropertyDescriptors();
// rebuild child entries using old when possible
childEntries = new PropertySheetEntry[descriptors.size()];
for (int i = 0; i < descriptors.size(); i++) {
IPropertyDescriptor d = (IPropertyDescriptor) descriptors.get(i);
// create new entry
PropertySheetEntry entry = new PropertySheetEntry();
entry.setDescriptor(d);
entry.setParent(this);
entry.setPropertySourceProvider(propertySourceProvider);
entry.refreshValues();
childEntries[i] = entry;
}
} /* (non-Javadoc)
/**
* Set the value for this entry.
*
* <p>We set the given value as the value for all our value objects. We then call our parent to
* update the property we represent with the given value. We then trigger a model refresh.
*
* <p>
*
* @param newValue the new value
*/
private void setValue(Object newValue) { // Set the value
for (int i = 0; i < values.length; i++) {
values[i] = newValue;
} // Inform our parent
parent.valueChanged(this);
// Refresh the model
refreshFromRoot();
}
public void resetPropertyValue() {
if (parent == null) // root does not have a default value
return;
// Use our parent's values to reset our values.
boolean change = false;
Object[] objects = parent.getValues();
for (int i = 0; i < objects.length; i++) {
IPropertySource source = getPropertySource(objects[i]);
if (source.isPropertySet(descriptor.getId())) {
source.resetPropertyValue(descriptor.getId());
change = true;
}
}
if (change) refreshValues();
}
/**
* Update our child entries. This implementation tries to reuse child entries if possible (if the
* id of the new descriptor matches the descriptor id of the old entry).
*/
private void refreshChildEntries() {
if (childEntries == null) // no children to refresh
return;
// get the current descriptors
List descriptors = computeMergedPropertyDescriptors();
// cache old entries by their descriptor id
Map entryCache = new HashMap(childEntries.length * 2 + 1);
for (int i = 0; i < childEntries.length; i++) {
entryCache.put(childEntries[i].getDescriptor().getId(), childEntries[i]);
} // create a list of entries to dispose
List entriesToDispose = new ArrayList(Arrays.asList(childEntries));
// rebuild child entries using old when possible
childEntries = new PropertySheetEntry[descriptors.size()];
boolean entriesChanged = descriptors.size() != entryCache.size();
for (int i = 0; i < descriptors.size(); i++) {
IPropertyDescriptor d = (IPropertyDescriptor) descriptors.get(i);
// see if we have an entry matching this descriptor
PropertySheetEntry entry = (PropertySheetEntry) entryCache.get(d.getId());
if (entry != null) { // reuse old entry
entry.setDescriptor(d);
entriesToDispose.remove(entry);
} else { // create new entry
entry = new PropertySheetEntry();
entry.setDescriptor(d);
entry.setParent(this);
entry.setPropertySourceProvider(propertySourceProvider);
entriesChanged = true;
}
entry.refreshValues();
childEntries[i] = entry;
}
if (entriesChanged) fireChildEntriesChanged();
// Dispose of entries which are no longer needed
for (int i = 0; i < entriesToDispose.size(); i++) {
((IPropertySheetEntry) entriesToDispose.get(i)).dispose();
}
}
/** Refresh the entry tree from the root down */
private void refreshFromRoot() {
if (parent == null) refreshChildEntries();
else parent.refreshFromRoot();
}