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Normal Topic How to select text in a Node? (Read 227 times)
GrandSon
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How to select text in a Node?
Mar 29th, 2024 at 6:36am
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Nodes(e.g. ShapeNode) are moved  when user try drag text to select.

I want to allow my user to select text on the node by drag mouse, and copy(Ctrl+C).

I tyied use EditComponent bellow:
Code (C++)
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var node = new CompositeNode { Bounds = new RectangleF(15, 35, 50, 7) };
var e = new EditComponent { Text = "editcomponent" };
e.TextChanging += (s, e) => e.Cancel = true;
node.Components.Add(e);
_diagram.Nodes.Add(node);


This is worked I want(Select by mouse, Disallow editing, Can copy text) except Caret is shown.
Can I hide Caret?
Or are there other solutions?
  
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Slavcho
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Re: How to select text in a Node?
Reply #1 - Mar 29th, 2024 at 11:54am
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Caret is shown when the EditComponent has focus. If you don't need users to enter text but only select, you could set e.Focusable = false; then caret will be hidden, selection will still work, but Ctrl+C won't be handled by the component (not having the keyboard focus to detect shortcut). You could handle it from DiagramView.KeyDown handler instead, by finding the SelectionStart -> SelectionLength substring of last clicked component and sending that to clipboard. Otherwise we could add some property to only hide the caret for next release.

For ShapeNodes, you might call BeginEdit from NodePointed event handler to make text immediately selectable. If you handle DiagramView.EnterInplaceEditMode event, you could customize TextBox colors to match the node's background, making the editor less obtrusive.

Regards,
Slavcho
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GrandSon
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Re: How to select text in a Node?
Reply #2 - Apr 2nd, 2024 at 1:40am
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Thank you, I resolved.

Code (C++)
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var node = new CompositeNode { Bounds = new RectangleF(15, 35, 50, 7) };
var e = new EditComponent { Text = "editcomponent" };
e.TextChanging += (s, e) => e.Cancel = true;
e.Focusable = false;

node.Components.Add(e);
_diagram.Nodes.Add(node);
_view.KeyDown += (o, ev) =>
{
    if(ev.Modifiers == Keys.Control && ev.KeyCode == Keys.C)
    {
        var s = e.SelectionStart;
        var l = e.SelectionLength;
        if(l < 0) // Adjustment when selecting from behind
        {
            (s, l) = (s + l, Math.Abs(l));
        }
        Clipboard.SetText(e.Text.Substring(s, l));
    }
};


Quote:
For ShapeNodes, you might call BeginEdit from NodePointed event handler to make text immediately selectable.

I'll try this too later.
  
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