本文整理了Java中org.eclipse.swt.widgets.Tree.setTopItem()方法的一些代码示例，展示了Tree.setTopItem()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Tree.setTopItem()方法的具体详情如下：
包路径：org.eclipse.swt.widgets.Tree
类名称：Tree
方法名：setTopItem

Tree.setTopItem介绍

[英]Sets the item which is currently at the top of the receiver. This item can change when items are expanded, collapsed, scrolled or new items are added or removed.
[中]设置当前位于接收器顶部的项目。当项目展开、折叠、滚动或添加或删除新项目时，此项目可能会更改。

代码示例

代码示例来源：origin: org.eclipse.platform/org.eclipse.debug.ui

@Override
public void reveal(TreePath path, int index) {
  Widget item = findItem(path);
  TreeItem[] children = null;
  if (item instanceof TreeItem) {
    children = ((TreeItem)item).getItems();
  } else if (item instanceof Tree) {
    children = ((Tree)item).getItems();
  }
  if (children != null && index < children.length) {
    getTree().setTopItem(children[index]);
  }
}

代码示例来源：origin: org.eclipse.pde/org.eclipse.pde.ui

@Override
public void mouseScrolled(MouseEvent e) {
  // scroll only when MOD1 is pressed
  if ((e.stateMask & SWT.MOD1) == SWT.MOD1 && fTree != null) {
    TreeItem item = fTree.getTopItem();
    if (item != null) {
      TreeItem nextItem = item;
      for (int i = 0; i < fSkipLines; i++) {
        TreeItem foundItem = null;
        if (e.count < 0) // determines scrolling direction
          foundItem = NextItem(fTree, nextItem);
        else
          foundItem = PreviousItem(fTree, nextItem);
        if (foundItem == null) {
          break;
        }
        nextItem = foundItem;
      }
      fTree.setTopItem(nextItem);
    }
  }
}

代码示例来源：origin: org.eclipse.pde/org.eclipse.pde.ui

private static void revealTopItem(Tree tree, int[] indexPath) {
  TreeItem itemFound = null;
  for (int i = indexPath.length - 1; i >= 0; i--) {
    int index = indexPath[i];
    if (itemFound != null) {
      itemFound = (itemFound.getItemCount() > index) ? itemFound.getItem(indexPath[i]) : null;
    } else if (i == indexPath.length - 1) {
      itemFound = (tree.getItemCount() > index) ? tree.getItem(indexPath[i]) : null;
    }
  }
  if (itemFound != null) {
    tree.setTopItem(itemFound);
  }
}

代码示例来源：origin: org.eclipse.jdt/org.eclipse.jdt.ui

tree.setTopItem(selection[0]);

代码示例来源：origin: org.eclipse.scout.sdk.deps/org.eclipse.jdt.ui

tree.setTopItem(selection[0]);

代码示例来源：origin: org.eclipse.jdt/org.eclipse.jdt.ui

treeViewer.getTree().setTopItem(items[0]);

代码示例来源：origin: org.eclipse.scout.sdk.deps/org.eclipse.jdt.ui

treeViewer.getTree().setTopItem(items[0]);

代码示例来源：origin: org.eclipse.platform/org.eclipse.ui.workbench

if (items.length > 0
    && getViewer().getTree().getSelectionCount() == 0) {
  treeViewer.getTree().setTopItem(items[0]);

代码示例来源：origin: org.codehaus.openxma/xmartclient

tree_.setTopItem(node2item(wModel_.getNode(topKey)));

代码示例来源：origin: BiglySoftware/BiglyBT

tree.setTopItem(topItem);
tree.setRedraw(true);