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How to determine node on TreeView on Mouse and Key event


By : Jlgrobe
Date : October 18 2020, 03:08 PM
I wish this help you You don't need to handle keyboard or mouse events, just handle AfterSelect event of TreeView control. The event will raise when you use mouse or keyboard to select nodes. e.Node is the node you are looking for:
code :
private void treeView1_AfterSelect(object sender, TreeViewEventArgs e)
{
    //e.Node is what you are looking for.
}


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How can I determine if the selected node is a child or parent node in TreeView?


By : Terry
Date : March 29 2020, 07:55 AM
this will help Exactly how you implement such a check depends on how you define "child" and "parent" nodes. But there are two properties exposed by each TreeNode object that provide important information:
code :
if (selectedNode.Nodes.Count == 0)
{
    MessageBox.Show("The node does not have any children.");
}
else
{
    MessageBox.Show("The node has children, so it must be a parent.");
}
if (selectedNode.Parent == null)
{
    MessageBox.Show("The node does not have a parent.");
}
else
{
    MessageBox.Show("The node has a parent, so it must be a child.");
}

How do I get the item (tree node) under the mouse pointer in a TreeView?


By : Zeratul Dtemplar
Date : March 29 2020, 07:55 AM
around this issue Let's say we want to select items using the right mouse button without using checkboxes. The following ButtonPress event handler does just that - it toggles the selected property of the item we have clicked with the RMB. We then use CellDataFuncs to highlight the selected items. tv is the TreeView, store is the underlying ListStore.
code :
[GLib.ConnectBefore]
void HandleTreeViewButtonPressEvent(object o, ButtonPressEventArgs args)
{
    if (args.Event.Button != 3)
        return;

    TreePath path;
    int x = Convert.ToInt32(args.Event.X);
    int y = Convert.ToInt32(args.Event.Y);
    if (!tv.GetPathAtPos (x, y, out path)) 
        return;

    TreeIter iter;      
    if (!store.GetIter(out iter, path)) 
        return;
    Item item = (Item) store.GetValue (iter, 0);

    item.Selected = !item.Selected;
    tv.QueueDraw();
}
    if (!sorted.GetIter(out iter, path)) 
        return;
    Item item = (Item) sorted.GetValue (iter, 0);

How to Handle Any Mouse Select Event WPF TreeView


By : Daisy Z
Date : March 29 2020, 07:55 AM
Hope this helps Use a Textblock element simply inside item template. After that you can access SelectedItemChanged event on treeview easily.
code :
        <TreeView.ItemTemplate>
            <HierarchicalDataTemplate ItemsSource="{Binding Children}" DataType="{x:Type local:SectionEntity}">
                <TextBlock Text="{Binding Text}"></TextBlock>
            </HierarchicalDataTemplate>
        </TreeView.ItemTemplate>

Windows form: Treeview AfterClick event responding differently for Mouse Left and Mouse Right Click


By : Rahul Tuteja
Date : March 29 2020, 07:55 AM
will be helpful for those in need The linked Post shows you how to select node using MouseDown.But you should know the MouseDown event triggers also when you click on +/- in TreeView while you want let the +/- perform it's original operation. So usually you need to check some other criteria to prevent unwanted behavior in TreeView:
code :
private void treeView1_MouseDown(object sender, MouseEventArgs e)
{
    TreeNode node = null;
    node = treeView1.GetNodeAt(e.X, e.Y);
    var hti = treeView1.HitTest(e.Location);

    if (e.Button != MouseButtons.Right ||
        hti.Location == TreeViewHitTestLocations.PlusMinus ||
        node == null)
    {
        return;
    }
    treeView1.SelectedNode = node;
    contextMenuStrip1.Show(treeView1, node.Bounds.Left, node.Bounds.Bottom);
}

Creating a 'mouse over' effect on a VB TreeView node


By : Manpreet Sidhu
Date : March 29 2020, 07:55 AM
Any of those help It was a no-brainer to get the node to be Bold on hover. However, setting the BackColor or ForeColor to any color e.g. wdYellow would just black out the entire node...
Posting example code in case anyone else runs into this:
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