Examples of org.eclipse.swt.widgets.TreeItem

org.eclipse.swt.widgets.TreeItem
ipse.org/swt/snippets/#tree">Tree, TreeItem, TreeColumn snippets @see Sample code and further information @noextend This class is not intended to be subclassed by clients.

    /* Update Checks on Selection */
    fViewer.getTree().addSelectionListener(new SelectionAdapter() {
      @Override
      public void widgetSelected(SelectionEvent e) {
        if (e.detail == SWT.CHECK) {
          TreeItem item = (TreeItem) e.item;
          setChildsChecked((IFolderChild) item.getData(), item.getChecked(), true);


          if (!item.getChecked())
            setParentsChecked((IFolderChild) item.getData(), false);
        }
      }
    });


    /* Update Checks on Expand */

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  }


  private void onMouseDown(Event event) {
    boolean disableTrackerTemporary = false;
    Point p = new Point(event.x, event.y);
    TreeItem item = fCustomTree.getControl().getItem(p);


    /* Problem - return */
    if (item == null || item.isDisposed())
      return;


    /* Don't run Tracker if other Mouse Button is used */
    if (event.button != 1)
      disableTrackerTemporary = true;


    /* Mouse-Up over Read-State-Column */
    if (event.button == 1 && item.getImageBounds(COL_TITLE).contains(p)) {
      Object data = item.getData();


      /* Toggle State between Read / Unread */
      if (data instanceof INews) {
        INews news = (INews) data;
        disableTrackerTemporary = (news.getState() == INews.State.READ);
        INews.State newState = (news.getState() == INews.State.READ) ? INews.State.UNREAD : INews.State.READ;
        setNewsState(new ArrayList<INews>(Arrays.asList(new INews[] { news })), newState);
      }
    }


    /* Mouse-Up over Sticky-State-Column */
    else if (event.button == 1 && item.getImageBounds(COL_STICKY).contains(p)) {
      Object data = item.getData();


      /* Toggle State between Sticky / Not Sticky */
      if (data instanceof INews) {
        disableTrackerTemporary = false;
        new MakeNewsStickyAction(new StructuredSelection(data)).run();

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      JobRunner.runDelayedFlagInversion(200, fBlockNewsStateTracker);
  }


  private void onMouseMove(Event event) {
    Point p = new Point(event.x, event.y);
    TreeItem item = fCustomTree.getControl().getItem(p);


    /* Problem / Group hovered - reset */
    if (item == null || item.isDisposed() || item.getData() instanceof EntityGroup) {
      if (fShowsHandCursor && !fCustomTree.getControl().isDisposed()) {
        fCustomTree.getControl().setCursor(null);
        fShowsHandCursor = false;
      }
      return;
    }


    /* Show Hand-Cursor if action can be performed */
    boolean changeToHandCursor = item.getImageBounds(COL_TITLE).contains(p) || item.getImageBounds(COL_STICKY).contains(p);
    if (!fShowsHandCursor && changeToHandCursor) {
      fCustomTree.getControl().setCursor(fHandCursor);
      fShowsHandCursor = true;
    } else if (fShowsHandCursor && !changeToHandCursor) {
      fCustomTree.getControl().setCursor(null);

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    /* Update Checks on Selection */
    fViewer.getTree().addSelectionListener(new SelectionAdapter() {
      @Override
      public void widgetSelected(SelectionEvent e) {
        if (e.detail == SWT.CHECK) {
          TreeItem item = (TreeItem) e.item;


          if (item.getData() instanceof CleanUpGroup)
            setChildsChecked((CleanUpGroup) item.getData(), item.getChecked(), true);


          if (!item.getChecked() && item.getData() instanceof CleanUpTask)
            setParentsChecked((CleanUpTask) item.getData(), false);
        }
      }
    });


    /* Update Checks on Expand */

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   */
  public TreeItemAdapter getParent() {
    if (fTree != null)
      return this;


    TreeItem parentItem = fTreeItem.getParentItem();
    if (parentItem != null)
      return new TreeItemAdapter(parentItem);


    return new TreeItemAdapter(fTreeItem.getParent());
  }

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            boolean hasFocus = fViewer.getTree().setFocus();
            boolean textChanged = !fInitialText.equals(fFilterText.getText().trim());


            /* Select the first matching Item */
            if (hasFocus && textChanged && fFilterText.getText().trim().length() > 0) {
              TreeItem item = getFirstMatchingItem(fViewer.getTree().getItems());
              if (item != null) {
                fViewer.getTree().setSelection(new TreeItem[] { item });
                ISelection sel = fViewer.getSelection();
                fViewer.setSelection(sel, true);
              }

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    else if (fNewsBgGradientStartColor != null && fNewsBgGradientEndColor != null) {
      int index = 0;


      /* Tree */
      if (event.item instanceof TreeItem) {
        TreeItem item = (TreeItem) event.item;
        TreeItem parentItem = item.getParentItem();
        if (parentItem != null)
          index = parentItem.indexOf(item);
        else
          index = item.getParent().indexOf(item);
      }


      /* Table */

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    /* Update Checks on Selection */
    fViewer.getTree().addSelectionListener(new SelectionAdapter() {
      @Override
      public void widgetSelected(SelectionEvent e) {
        if (e.detail == SWT.CHECK) {
          TreeItem item = (TreeItem) e.item;
          setChildsChecked((IFolderChild) item.getData(), item.getChecked(), false);


          if (!item.getChecked())
            setParentsChecked((IFolderChild) item.getData(), false);
        }
      }
    });


    /* Update Checks on Expand */

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  private void addToViewers(List<INews> addedNews) {


    /* Add to Table-Viewer if Visible (keep top item and selection stable) */
    if (fFeedView.isTableViewerVisible()) {
      Tree tree = fTableViewer.getTree();
      TreeItem topItem = tree.getTopItem();
      int indexOfTopItem = 0;
      if (topItem != null)
        indexOfTopItem = tree.indexOf(topItem);


      tree.setRedraw(false);

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  private void expandNewsTableViewerGroups(boolean delayRedraw, ISelection oldSelection) {
    TreeViewer viewer = fNewsTableControl.getViewer();
    Tree tree = (Tree) viewer.getControl();


    /* Remember TopItem if required */
    TreeItem topItem = oldSelection.isEmpty() ? tree.getTopItem() : null;


    /* Expand All & Restore Selection with redraw false */
    if (delayRedraw)
      tree.getParent().setRedraw(false);
    try {

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