Hi,
You can sub-class the ListView class and override its WndProc method to catch the WM_VSCROLL and WM_HSCROLL messages, andcreate a Scroll event for it. Then you can handle this Scroll event to send related scroll message to another ListView, see my sample below for the details
Code Snippet partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
this.listView1.View = View.Details;
this.listView2.View = View.Details;
for (int j = 0; j < 10; j++)
{
this.listView1.Columns.Add("c" + j.ToString());
this.listView2.Columns.Add("c" + j.ToString());
}
for (int j = 0; j < 300; j++)
{
ListViewItem item = new ListViewItem("item" + j.ToString());
for (int k = 1; k < 10; k++)
{
item.SubItems.Add("sub item" + k.ToString());
}
this.listView1.Items.Add(item);
this.listView2.Items.Add(item.Clone() as ListViewItem);
}
this.listView1.Scroll += new ListViewEx.ScrollHandler(listView1_Scroll);
//this.listView2.Scroll += new ListViewEx.ScrollHandler(listView2_Scroll);
}
[DllImport("user32.dll")]
static extern IntPtr SendMessage(IntPtr hWnd, int Msg, IntPtr wParam, IntPtr lParam);
[DllImport("user32.dll")]
static extern int SetScrollPos(IntPtr hWnd, int nBar, int nPos, bool bRedraw);
private const int WM_HSCROLL = 0x114;
private const int WM_VSCROLL = 0x115;
private const int SBS_HORZ = 0;
private const int SBS_VERT = 1;
void listView1_Scroll(object sender, MyScrollEventArgs e)
{
ListViewEx listVw = sender as ListViewEx;
Int16 hi = (Int16)((int)e.WParam >> 16);//position
Int16 lo = (Int16)e.WParam;//scroll type
if (e.Orientation == ScrollOrientation.VerticalScroll)
{
if (lo == 5) //SB_THUMBTRACK
{
if (SetScrollPos(this.listView2.Handle, SBS_VERT, hi, true) != 0)
{
SendMessage(this.listView2.Handle, WM_VSCROLL,
(IntPtr)(4 + 0x10000 * hi), IntPtr.Zero);
}
}
else
{
SendMessage(this.listView2.Handle, WM_VSCROLL, e.WParam, IntPtr.Zero);
}
}
if (e.Orientation == ScrollOrientation.HorizontalScroll)
{
if (lo == 5)//SB_THUMBTRACK
{
SetScrollPos(this.listView2.Handle, SBS_HORZ, hi, true);
SendMessage(this.listView2.Handle, WM_HSCROLL,
(IntPtr)(4 + 0x10000 * hi), IntPtr.Zero);
}
else
{
SendMessage(this.listView2.Handle, WM_HSCROLL, e.WParam, IntPtr.Zero);
}
}
}
}
Code Snippet
public class ListViewEx : ListView
{
public delegate void ScrollHandler(object sender, MyScrollEventArgs e);
public event ScrollHandler Scroll;
public void OnScroll(MyScrollEventArgs e)
{
if (Scroll != null)
{
Scroll(this, e);
}
}
private const int WM_HSCROLL = 0x114;
private const int WM_VSCROLL = 0x115;
protected override void WndProc(ref Message m)
{
if (m.Msg == WM_VSCROLL)
{
MyScrollEventArgs e = new MyScrollEventArgs();
e.WParam = m.WParam;
e.Orientation = ScrollOrientation.VerticalScroll;
OnScroll(e);
}
if (m.Msg == WM_HSCROLL)
{
MyScrollEventArgs e = new MyScrollEventArgs();
e.WParam = m.WParam;
e.Orientation = ScrollOrientation.HorizontalScroll;
OnScroll(e);
}
base.WndProc(ref m);
}
}
public class MyScrollEventArgs : EventArgs
{
private ScrollOrientation orientation;
private IntPtr wParam;
public IntPtr WParam
{
get { return wParam; }
set { wParam = value; }
}
public ScrollOrientation Orientation
{
get { return orientation; }
set { orientation = value; }
}
}
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