[Mono-bugs] [Bug 325809] New: [Patch] Control: Clicking causes the control to be selected.

[bugzilla_noreply at novell.com]

https://bugzilla.novell.com/show_bug.cgi?id=325809

           Summary: [Patch] Control: Clicking causes the control to be
                    selected.
           Product: Mono: Class Libraries
           Version: unspecified
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: Normal
          Priority: P5 - None
         Component: Windows.Forms
        AssignedTo: mono-bugs at ximian.com
        ReportedBy: georgegiolfan at yahoo.com
         QAContact: mono-bugs at ximian.com
          Found By: ---


Created an attachment (id=172864)
 --> (https://bugzilla.novell.com/attachment.cgi?id=172864)
Possible fix. I have only checked a simple real application.

Description of Problem:
Clicking a control apparently selects it (on MWF). On .NET Framework 2.0 this
does not happen.

Steps to reproduce the problem:

using System;
using System.Diagnostics;
using System.Drawing;
using System.Windows.Forms;

static class Test
{
        static void Main ()
        {
                new TestForm ().Show ();
        }
}

class TestForm : Form
{
        FocusTestControl c1 = new FocusTestControl ();
        FocusTestControl c2 = new FocusTestControl ();

        public TestForm ()
        {
                c1.Text = "1";
                c2.Text = "2";
                c2.Dock = DockStyle.Fill;
                Controls.AddRange (new Control [] { c1, c2 });
        }

        protected override void OnLoad (EventArgs e)
        {
                base.OnLoad (e);
                Debug.Assert (!c1.Focused, "1");
                Debug.Assert (!c2.Focused, "2");
                Debug.Assert (ActiveControl == null, "3");
                Debug.Assert (c1.SelectCalls == 0, "4");
                Debug.Assert (c2.SelectCalls == 0, "5");
                c2.SimulateClick ();
                Debug.Assert (!c1.Focused, "1 1");
                Debug.Assert (!c2.Focused, "2 1");
                Debug.Assert (ActiveControl == null, "3 1");
                Debug.Assert (c1.SelectCalls == 0, "4 1");
                Debug.Assert (c2.SelectCalls == 0, "5 1");
        }
}

class FocusTestControl : Control
{
        public int SelectCalls;

        public void SimulateClick ()
        {
                const int WM_LBUTTONDOWN = 0x0201;
                Message m = new Message ();
                m.Msg = WM_LBUTTONDOWN;
                Debug.Assert (CanSelect);
                WndProc (ref m);
        }

        protected override void Select (bool directed, bool forward)
        {
                base.Select (directed, forward);
                SelectCalls++;
        }
}

Additional Information:
This seems to be done on purpose (see the patch). I am guessing there is a
reason for it (maybe this is the behavior of an older version) since it is not
a result of a recent change. Maybe someone who has an older .NET Framework
installed can check this to see if it is a 2.0 change.


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