[Mono-bugs] [Bug 429153] New: ListView: WndProc Mouse Events

bugzilla_noreply at novell.com bugzilla_noreply at novell.com
Tue Sep 23 09:19:37 EDT 2008


           Summary: ListView: WndProc Mouse Events
           Product: Mono: Class Libraries
           Version: SVN
          Platform: Other
        OS/Version: Windows Vista
            Status: NEW
          Severity: Normal
          Priority: P5 - None
         Component: Windows.Forms
        AssignedTo: mono-bugs at lists.ximian.com
        ReportedBy: johnm at hlaustralia.com.au
         QAContact: mono-bugs at lists.ximian.com
          Found By: Community User

Description of Problem:

To match MS .NET
A derived ListView should have first look at the WM_LBUTTONDOWN, etc messages.

Steps to reproduce the problem:
using System;
using System.Windows.Forms;

public class test
   public class TouchListView : ListView
        private const int WM_LBUTTONUP = 0x202;
        private const int WM_LBUTTONDOWN = 0x201;
        private const int WM_LBUTTONDBLCLK = 0x203;

        protected override void WndProc(ref Message m)

            if (m.Msg == WM_LBUTTONDOWN || m.Msg == WM_LBUTTONDBLCLK) 
                        Console.WriteLine("GOT LBUTTONDOWN");

            if (m.Msg == WM_LBUTTONUP)
                Console.WriteLine("GOT LBUTTONUP");

                int pos = m.LParam.ToInt32();
                //int x = pos & 0xFFFF;
                int x = 0;
                int y = pos / 0x10000;

                //Console.WriteLine(pos.ToString() + " " + x.ToString() + " " +

                ListViewItem item = this.GetItemAt(x,y);
                if (item != null) 
                    item.Selected = !item.Selected;
            base.WndProc(ref m);

    static void Main ()
            Form f = new Form ();

            ListView lv = new TouchListView ();
            lv.FullRowSelect = true;
            lv.HideSelection = false;
            lv.View = View.Details;


            lv.Parent = f;


            Application.Run (f);

Actual Results:
Mouse Events are never retrieved.

Expected Results:
Should be able to click each of the list view items without losing selection.

How often does this happen? 

Additional Information:
If there are no items the events are received.

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