Examples of org.eclipse.swt.widgets.Tree

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

    /*
     * @see org.eclipse.jface.viewers.ColumnViewerToolTipSupport#getToolTipArea(org.eclipse.swt.widgets.Event)
     */
    @Override
    protected Object getToolTipArea(Event event) {
      Tree tree = (Tree) event.widget;
      Point point = new Point(event.x, event.y);
      TreeItem item = tree.getItem(point);


      /* Only valid for Feed Column */
      if (item != null) {
        int feedIndex = indexOf(tree, NewsColumn.FEED);
        if (feedIndex >= 0 && item.getBounds(feedIndex).contains(point))

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    /*
     * @see org.eclipse.jface.viewers.ColumnViewerToolTipSupport#getToolTipArea(org.eclipse.swt.widgets.Event)
     */
    @Override
    protected Object getToolTipArea(Event event) {
      Tree tree = (Tree) event.widget;
      Point point = new Point(event.x, event.y);
      TreeItem item = tree.getItem(point);


      /* Only valid for Feed Column */
      if (item != null) {
        if (item.getBounds(COL_FEED).contains(point))
          return super.getToolTipArea(event);

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    /* Enter was hit */
    if ((traversal & SWT.TRAVERSE_RETURN) != 0) {


      /* Select and Focus TreeViewer */
      if (isTableViewerVisible()) {
        Tree tree = (Tree) fNewsTableControl.getViewer().getControl();
        if (tree.getItemCount() > 0) {
          fNewsTableControl.getViewer().setSelection(new StructuredSelection(tree.getItem(0).getData()));
          fNewsTableControl.setFocus();
        }
      }


      /* Move Focus into BrowserViewer */

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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 {
      viewer.expandAll();


      /* Restore selection if required */
      if (!oldSelection.isEmpty() && viewer.getSelection().isEmpty())
        viewer.setSelection(oldSelection, true);
      else if (topItem != null)
        tree.setTopItem(topItem);
    } finally {
      if (delayRedraw)
        tree.getParent().setRedraw(true);
    }
  }

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  }


  /* TODO This is a Workaround until Eclipse Bug #159586 is fixed */
  private void stableSetInputToNewsTable(Object input, ISelection oldSelection) {
    TreeViewer viewer = fNewsTableControl.getViewer();
    Tree tree = (Tree) viewer.getControl();


    /* Set Input & Restore Selection with redraw false */
    tree.getParent().setRedraw(false);
    try {
      fNewsTableControl.setPartInput(input);


      /* Restore selection if required */
      if (oldSelection != null) {
        fNewsTableControl.setBlockNewsStateTracker(true);
        try {
          viewer.setSelection(oldSelection);
        } finally {
          fNewsTableControl.setBlockNewsStateTracker(false);
        }
      }


      /* Set Top Item */
      if (tree.getItemCount() > 0)
        tree.setTopItem(tree.getItem(0));
    } finally {
      tree.getParent().setRedraw(true);
    }
  }

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    /* TODO Better support for maximized Browser */
    if (!isTableViewerVisible())
      return true;


    Tree newsTree = fNewsTableControl.getViewer().getTree();


    /* Nothing to Navigate to */
    if (newsTree.getItemCount() == 0 || newsTree.isDisposed())
      return false;


    /* Navigate */
    return navigate(newsTree, respectSelection, next, unread);
  }

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      }
    });
  }


  private void updateSelectionAfterDelete(Runnable runnable) {
    Tree tree = (Tree) getControl();
    IStructuredSelection selection = (IStructuredSelection) getSelection();


    /* Nothing to do, since no selection */
    if (selection.isEmpty()) {
      runnable.run();

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  /**
   * @param parent
   * @param style
   */
  public CTree(Composite parent, int style) {
    fTree = new Tree(parent, style);
    parent.addListener(SWT.Resize, new Listener() {
      public void handleEvent(Event event) {
        onTreeResize();
      }
    });

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   * if <code>FALSE</code>.
   * @return Returns <code>TRUE</code> in case navigation found a valid item,
   * or <code>FALSE</code> otherwise.
   */
  public boolean navigate(boolean newsScoped, boolean next, boolean unread) {
    Tree explorerTree = fViewer.getTree();


    /* Nothing to Navigate to */
    if (explorerTree.isDisposed())
      return false;


    ITreeNode targetNode = null;


    /* 1.) Navigate in opened Tree */

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  /*
   * @see org.rssowl.ui.internal.editors.feed.IFeedViewPart#setInput(java.lang.Object)
   */
  public void setPartInput(Object input) {
    Object oldInput = fViewer.getInput();
    Tree tree = fCustomTree.getControl();
    TreeColumn feedColumn = tree.getColumn(COL_FEED);


    /* Old: Bookmark, New: Saved Search */
    if (oldInput instanceof FeedLinkReference && input instanceof ISearchMark)
      fCustomTree.setVisible(feedColumn, true, true);

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