private static extern bool GetScrollInfo(IntPtr hWnd, int fnBar, ref SCROLLINFO info);
/// <summary>
/// Intercept scroll messages to send notifications
/// </summary>
/// <param name="m">Message parameters</param>
protected override void WndProc(ref Message m)
{
// Let the control process the message
base.WndProc(ref m);
// Was this a horizontal scroll message?
if (m.Msg == WM_HSCROLL)
{
if (HorizontalScroll != null)
{
var wParam = (uint) m.WParam.ToInt32();
var si = new SCROLLINFO();
si.cbSize = Marshal.SizeOf(si);
si.fMask = SIF_ALL;
bool ret = GetScrollInfo(Handle, SB_HORZ, ref si);
HorizontalScroll(this,
new MozScrollEventArgs(
GetEventType(wParam & 0xffff), (int) (wParam >> 16), si));
}
}
// or a vertical scroll message?
else if (m.Msg == WM_VSCROLL)
{
if (VerticalScroll != null)
{
var wParam = (uint) m.WParam.ToInt32();
var si = new SCROLLINFO();
si.cbSize = Marshal.SizeOf(si);
si.fMask = SIF_ALL;
bool ret = GetScrollInfo(Handle, SB_VERT, ref si);
VerticalScroll(this,
new MozScrollEventArgs(
GetEventType(wParam & 0xffff), (int) (wParam >> 16), si));
}
}
}
/// <summary>
/// Initializes a new instance of the MozItemEventArgs class with default settings
/// </summary>
public MozScrollEventArgs(ScrollEventType type, int newValue, SCROLLINFO info)
{
m_type = type;
m_newValue = newValue;
m_info = info;
}