private TreeNode MakeNode(CShItem item)
{
TreeNode newNode = new TreeNode(item.DisplayName);
newNode.Tag = item;
newNode.ImageIndex = SystemImageListManager.GetIconIndex(item, false, false);
newNode.SelectedImageIndex = SystemImageListManager.GetIconIndex(item, true, false);
//The following code, from Calum implements the following logic
// Allow/disallow the showing of Hidden folders based on ShowHidden Propert
// For Removable disks, always show + (allow expansion) - avoids floppy access
// For all others, add + based on HasSubFolders
// Except - If showing Hidden dirs, do extra check to allow for
// the case of all hidden items in the Dir which will cause
// HasSubFolders to be always left unset
if (item.IsRemovable) //Calum's fix to hidden file fix
{
newNode.Nodes.Add(new TreeNode(" : "));
}
else if (item.HasSubFolders)
{
newNode.Nodes.Add(new TreeNode(" : "));
//Begin Calum's change so Hidden dirs with all hidden content are expandable
}
else if (item.GetDirectories(true).Count > 0) //Added Code
{
newNode.Nodes.Add(new TreeNode(" : ")); //Added Code
//End Calum's change
}
return(newNode);
}
private void OnStartUpDirectoryChanged(StartDir newVal)
{
if (Root != null)
{
ClearTree();
}
CShItem special;
special = ExpTreeLib.CShItem.GetCShItem((ShellDll.CSIDL)(int)(m_StartUpDirectory));
Root = new TreeNode(special.DisplayName);
Root.ImageIndex = SystemImageListManager.GetIconIndex(special, false, false);
Root.SelectedImageIndex = Root.ImageIndex;
Root.Tag = special;
BuildTree(special.GetDirectories(true));
tv1.Nodes.Add(Root);
Root.Expand();
}
///<Summary>When a form containing this control is Hidden and then re-Shown,
/// the association to the SystemImageList is lost. Also lost is the
/// Expanded state of the various TreeNodes.
/// The VisibleChanged Event occurs when the form is re-shown (and other times
/// as well).
/// We re-establish the SystemImageList as the ImageList for the TreeView and
/// restore at least some of the Expansion.</Summary>
private void tv1_VisibleChanged(object sender, System.EventArgs e)
{
if (tv1.Visible)
{
SystemImageListManager.SetTreeViewImageList(tv1, false);
if (Root != null)
{
Root.Expand();
if (tv1.SelectedNode != null)
{
tv1.SelectedNode.Expand();
}
else
{
tv1.SelectedNode = this.Root;
}
}
}
}
public ExpTree()
{
//This call is required by the Windows Form Designer.
InitializeComponent();
//Add any initialization after the InitializeComponent() call
//setting the imagelist here allows many good things to happen, but
// also one bad thing -- the "tooltip" like display of selectednode.text
// is made invisible. This remains a problem to be solved.
SystemImageListManager.SetTreeViewImageList(tv1, false);
StartUpDirectoryChanged += new ExpTreeLib.ExpTree.StartUpDirectoryChangedEventHandler(OnStartUpDirectoryChanged);
OnStartUpDirectoryChanged(m_StartUpDirectory);
if (tv1.IsHandleCreated)
{
if (this.AllowDrop)
{
if (Application.OleRequired() == System.Threading.ApartmentState.STA)
{
DragDropHandler = new TVDragWrapper(tv1);
DragDropHandler.ShDragEnter += new ExpTreeLib.TVDragWrapper.ShDragEnterEventHandler(DragWrapper_ShDragEnter);
DragDropHandler.ShDragLeave += new ExpTreeLib.TVDragWrapper.ShDragLeaveEventHandler(DragWrapper_ShDragLeave);
DragDropHandler.ShDragOver += new ExpTreeLib.TVDragWrapper.ShDragOverEventHandler(DragWrapper_ShDragOver);
DragDropHandler.ShDragDrop += new ExpTreeLib.TVDragWrapper.ShDragDropEventHandler(DragWrapper_ShDragDrop);
int res;
res = ShellDll.RegisterDragDrop(tv1.Handle, DragDropHandler);
if (!(res == 0) || (res == -2147221247))
{
Marshal.ThrowExceptionForHR(res);
throw (new Exception("Failed to Register DragDrop for " + this.Name));
}
}
else
{
throw (new ThreadStateException("ThreadMustBeSTA"));
}
}
}
}
