Java Code Examples for org.eclipse.swt.widgets.TreeItem#getGrayed()

/**
 * Update the parent and children nodes after a checkstate change (e.g. recalculation of the grayed state, automatic
 * checking/unchecking of children)
 *
 * @param element
 *          the element that was checked/unchecked
 */
protected void doCheckStateChanged(final Object element) {
  final Widget item = findItem(element);
  if (item instanceof TreeItem) {
    final TreeItem treeItem = (TreeItem) item;
    updateChildrenItems(treeItem);

    final Item[] children = getChildren(item);
    if (children.length > 0) {
      boolean containsChecked = false;
      boolean containsUnchecked = false;
      for (final Item element2 : children) {
        final TreeItem curr = (TreeItem) element2;
        containsChecked |= curr.getChecked();
        containsUnchecked |= (!curr.getChecked() || curr.getGrayed());
      }
      treeItem.setChecked(containsChecked);
      treeItem.setGrayed(containsChecked && containsUnchecked);
    }
    updateParentItems(treeItem.getParentItem());
  }
}
 

/**
 * Updates the check / gray state of all parent items.
 *
 * @param item
 *          the item
 */
private void updateParentItems(final TreeItem item) {
  if (item != null) {
    final Item[] children = getChildren(item);
    boolean containsChecked = false;
    boolean containsUnchecked = false;
    for (final Item element : children) {
      final TreeItem curr = (TreeItem) element;
      containsChecked |= curr.getChecked();
      containsUnchecked |= (!curr.getChecked() || curr.getGrayed());
    }
    item.setChecked(containsChecked);
    item.setGrayed(containsChecked && containsUnchecked);
    updateParentItems(item.getParentItem());
  }
}
 

/**
 * Initializes a given TreeViewer "widget" item according to the tree viewer
 * content provider model.
 *
 * @param item
 *          the item to initialize
 */
private void initialize(final TreeItem item) {
  boolean containsChecked = false;
  boolean containsUnchecked = false;

  if (item.getData() instanceof PreferenceRule) {
    if (((PreferenceRule) item.getData()).isOptional()) {
      item.setChecked(!getPreferenceStore().getBoolean(getPreferenceKey(((PreferenceRule) item.getData()))));
    } else {
      item.setGrayed(true);
      item.setChecked(true);
    }
  } else {
    for (final TreeItem child : item.getItems()) {
      initialize(child);
      containsChecked |= child.getChecked();
      containsUnchecked |= (!child.getChecked() || child.getGrayed());
    }
    item.setChecked(containsChecked);
    item.setGrayed(containsChecked && containsUnchecked);
  }
}
 

/**
 * Updates the check / gray state of all parent items
 */
private void updateParentItems(TreeItem item) {
	if (item != null) {
		Item[] children= getChildren(item);
		boolean containsChecked= false;
		boolean containsUnchecked= false;
		for (int i= 0; i < children.length; i++) {
			TreeItem curr= (TreeItem) children[i];
			containsChecked |= curr.getChecked();
			containsUnchecked |= (!curr.getChecked() || curr.getGrayed());
		}
		item.setChecked(containsChecked);
		item.setGrayed(containsChecked && containsUnchecked);
		updateParentItems(item.getParentItem());
	}
}
 

protected void checkPath(TreeItem item, boolean checked, boolean grayed) {
    if (item == null) 
    	return;
    if (grayed) {
        checked = true;
    } else {
        int index = 0;
        TreeItem[] items = item.getItems();
        while (index < items.length) {
            TreeItem child = items[index];
            if (child.getGrayed() || checked != child.getChecked()) {
                checked = grayed = true;
                break;
            }
            index++;
        }
    }
    item.setChecked(checked);
    item.setGrayed(grayed);
    checkPath(item.getParentItem(), checked, grayed);
}
 

private static void getSelection(Vector<TreeItem> vecTreeItem,TreeItem tiNode){
	
	if(tiNode.getChecked() == true && tiNode.getGrayed() == false){
		vecTreeItem.add(tiNode);
	}else if(tiNode.getChecked() == true && tiNode.getGrayed() == true){
		TreeItem[] tiRoot = tiNode.getItems();
		for(int i=0;i<tiRoot.length;i++){
			getSelection(vecTreeItem,tiRoot[i]);
		}
	}
}
 

/**
 * Updates the check state of all created children
 */	
private void updateChildrenItems(TreeItem parent) {
	Item[] children= getChildren(parent);
	boolean state= parent.getChecked();
	for (int i= 0; i < children.length; i++) {
		TreeItem curr= (TreeItem) children[i];
		if (curr.getData() != null && ((curr.getChecked() != state) || curr.getGrayed())) {
			curr.setChecked(state);
			curr.setGrayed(false);
			updateChildrenItems(curr);
		}
	}
}
 

/**
 * Returns <code>true</code> if any of the root resources are grayed.
 */
private IResource areAnyElementsChecked() {
	TreeItem[] item = fViewer.getTree().getItems();
	for (int i = 0; i < item.length; i++) {
		TreeItem child = item[i];
		if(child.getChecked() || child.getGrayed()) {
			return (IResource)child.getData();
		}
	}
	return null;
}
 

private void collectCheckedItems(TreeItem item, List checked) {
	if(item.getChecked() && !item.getGrayed()) {
		checked.add(item.getData());
	} else if(item.getGrayed()) {
		TreeItem[] children = item.getItems();
		for (int i = 0; i < children.length; i++) {
			TreeItem child = children[i];
			collectCheckedItems(child, checked);
		}
	}
}
 

private String getContentTypes(final TreeItem item, final String types) {
  String result = types;
  if (item.getChecked() && !item.getGrayed()) {
    if (!"".equals(types)) {
      result += "|";
    }
    result += item.getData();
  }
  for (final TreeItem child : item.getItems()) {
    result = getContentTypes(child, result);
  }
  return result;
}
 

/**
 * The item has expanded. Updates the checked state of its children. 
 */
private void initializeItem(TreeItem item) {
	if (item.getChecked() && !item.getGrayed()) {
		updateChildrenItems((TreeItem) item);
	}
}
 

/**
 * The item has expanded. Updates the checked state of its children.
 *
 * @param item
 *          the item
 */
private void initializeItem(final TreeItem item) {
  if (item.getChecked() && !item.getGrayed()) {
    updateChildrenItems(item);
  }
}