/// <summary>
/// create parent row
/// </summary>
/// <param name="parentIdx">index of parent</param>
/// <param name="afterSibling">add new node after this sibling, if equals 0, add node as first child</param>
/// <param name="mgRow">idx of new node</param>
internal void createNode(int parentIdx, int afterSiblingIdx, int mgRow)
{
Debug.Assert(Misc.IsGuiThread());
TreeNode item = null;
Object parent = controlsMap.object2Widget(_mgTreeControl, parentIdx);
Debug.Assert(parent != null);
int idx = 0;
TreeChild afterSibling = null;
if (afterSiblingIdx > 0)
{
afterSibling = (TreeChild)controlsMap.object2Widget(_mgTreeControl, afterSiblingIdx);
idx = afterSibling.getIndex() + 1;
}
if (parent is TreeView)
{
item = ((TreeView)parent).Nodes.Insert(idx, "");
// ensure that the root is visible even if the tree is not visible.
// if not ensured, set expand might not work on nodes and when tree is visible
// it will be collapsed.
item.EnsureVisible();
}
else if (parent is TreeChild)
{
((TreeChild)parent).removeDummyItem();
item = (((TreeChild)parent).getTreeNode()).Nodes.Insert(idx, "");
}
else
{
Debug.Assert(false);
}
TreeChild treeChild = new TreeChild(this, _mgTreeControl, 0, mgRow, item);
// check that we do not add node twice
Debug.Assert(controlsMap.object2Widget(_mgTreeControl, mgRow) == null);
// add treechild to madding
controlsMap.add(_mgTreeControl, mgRow, treeChild);
// set map data on tree item
item.Tag = new TagData();
controlsMap.setMapData(_mgTreeControl, mgRow, item);
}
/// <summary>
/// move node under parent to a location after 'afterSiblingIdx'.
/// </summary>
/// <param name="parentIdx">The parent node under which we are moving the node</param>
/// <param name="afterSiblingIdx">The new location is after that sibling</param>
/// <param name="nodeId">The node to move</param>
internal void moveNode(int parentIdx, int afterSiblingIdx, int nodeId)
{
Debug.Assert(Misc.IsGuiThread());
Object parent = controlsMap.object2Widget(_mgTreeControl, parentIdx);
Debug.Assert(parent != null);
int idx = 0;
TreeChild afterSibling = null;
TreeChild nodeToMove = null;
//get the treeChild of the node to move
nodeToMove = (TreeChild)controlsMap.object2Widget(_mgTreeControl, nodeId);
// get the new index under the parent
if (afterSiblingIdx > 0)
{
afterSibling = (TreeChild)controlsMap.object2Widget(_mgTreeControl, afterSiblingIdx);
idx = afterSibling.getIndex() + 1;
}
//inserting an open node, raises the before expand. avoid it.
_treeControl.BeforeExpand -= TreeHandler.getInstance().BeforeExpandHandler;
// remove from the nodes collection and add at the new location.
if (parent is TreeView)
{
//remove and insert of a root (The parent is the tree itself)
((TreeView)parent).Nodes.Remove(nodeToMove.getTreeNode());
((TreeView)parent).Nodes.Insert(idx, nodeToMove.getTreeNode());
}
else if (parent is TreeChild)
{
//remove and insert of a node with another node as a parent.
(((TreeChild)parent).getTreeNode()).Nodes.Remove(nodeToMove.getTreeNode());
(((TreeChild)parent).getTreeNode()).Nodes.Insert(idx, nodeToMove.getTreeNode());
}
else
{
Debug.Assert(false);
}
// resume handling 'Before expand'.
_treeControl.BeforeExpand += TreeHandler.getInstance().BeforeExpandHandler;
}
