public void ExpandTreeNode(MyTreeNode treeNode)
{
// look at the first child of this tree. If the node
// associated with it isn't null, then we've already
// done the expansion before.
MyTreeNode childTreeNode = (MyTreeNode)treeNode.Nodes[0];
if (childTreeNode.Node != null)
{
return;
}
treeNode.Nodes.Clear(); // get rid of null entry
DirectoryNode directoryNode = (DirectoryNode)treeNode.Node;
// As we walk though the tree, we need to figure out the
// percentages for each item. We do that based upon the
// full size of this directory.
float dirSize = directoryNode.SizeTree;
foreach (DirectoryNode subdir in directoryNode.GetDirectories())
{
PopulateTreeNode(treeNode.Nodes, subdir);
}
foreach (FileNode fileNode in directoryNode.GetFiles())
{
TreeNode treeFileNode = new MyTreeNode(fileNode.NameSize, fileNode);
treeFileNode.ImageIndex = FractionToIndex(fileNode);
treeFileNode.SelectedImageIndex = treeFileNode.ImageIndex;
treeNode.Nodes.Add(treeFileNode);
}
}
protected void treeContextMenuClick(object sender, EventArgs e)
{
MenuItem menuItem = (MenuItem)sender;
MyTreeNode treeNode = (MyTreeNode)treeView1.SelectedNode;
BaseNode baseNode = treeNode.Node;
bool updateSizes = false;
switch (menuItem.Index)
{
case menuIndexDelete:
if (baseNode.Delete(true))
{
updateSizes = true;
treeNode.Remove();
}
break;
case menuIndexDeleteContents:
if (((DirectoryNode)baseNode).DeleteContents())
{
foreach (MyTreeNode childNode in treeNode.Nodes)
{
childNode.Remove();
}
updateSizes = true;
}
break;
case menuIndexViewInNotepad:
ProcessStartInfo processStartInfo = new ProcessStartInfo();
processStartInfo.FileName = "notepad";
processStartInfo.Arguments = baseNode.FullName;
Process.Start(processStartInfo);
break;
case menuIndexLaunch:
try
{
processStartInfo = new ProcessStartInfo();
processStartInfo.FileName = baseNode.FullName;
Process.Start(processStartInfo);
}
catch (Exception exc)
{
MessageBox.Show(exc.ToString());
}
break;
}
if (updateSizes)
{
directoryNode.ClearSizeCache();
UpdateTreeNodes(this.treeView1.Nodes);
if (directoryNodeBaseline != null)
{
directoryNode.CompareTrees(directoryNodeBaseline);
}
}
}
public void PopulateTreeNode(TreeNodeCollection treeNodeCollection,
DirectoryNode directoryNode)
{
TreeNode treeNode = new MyTreeNode(directoryNode.NameSize, directoryNode);
treeNode.ImageIndex = FractionToIndex(directoryNode);
treeNode.SelectedImageIndex = treeNode.ImageIndex;
// Adding an item to the list has to be done on the
// main thread of the control. We can get to it by
// setting up a delegate that we want to call,
// and then calling Invoke() on the treeview control.
AddDelegate addDelegate = new AddDelegate(treeNodeCollection.Add);
// Bug: Invoke should be declared with params.
treeView1.Invoke(addDelegate, new object[] { treeNode });
if (directoryNode.SizeTree != 0)
{
// Add a fake entry to this node so that there will be
// a + sign in front of it.
// Use invoke to delegate this call to the control.
addDelegate = new AddDelegate(treeNode.Nodes.Add);
treeView1.Invoke(addDelegate, new Object[] { new MyTreeNode("", null) });
}
}
void DeleteTreeNode(MyTreeNode nodeToDelete)
{
MyTreeNode parentNode = (MyTreeNode)nodeToDelete.Parent;
// Delete the node from this directory, and update
// the sizes...
((DirectoryNode)parentNode.Node).DeleteNode(nodeToDelete.Node);
}