private void vScroll_Scroll(object sender, System.Windows.Forms.ScrollEventArgs e)
{
ScrollInfoStruct sI = new ScrollInfoStruct();
sI.fMask = SIF_ALL;
sI.cbSize = Marshal.SizeOf(sI);
GetScrollInfo(listView.Handle, 1, ref sI);
if (vScroll.Value != sI.nPos)
{
int scrollDifference = vScroll.Value - sI.nPos;
if (scrollDifference < 0)
{
scrollDifference = Math.Abs(scrollDifference);
for (int x = 0; x < scrollDifference; x++)
{
SendMessage(listView.Handle, 277, (IntPtr)0, (IntPtr)0);
}
}
else
{
for (int x = 0; x < scrollDifference; x++)
{
SendMessage(listView.Handle, 277, (IntPtr)1, (IntPtr)0);
}
}
}
}
private void hScroll_Scroll(object sender, System.Windows.Forms.ScrollEventArgs e)
{
ScrollInfoStruct sI = new ScrollInfoStruct();
sI.fMask = SIF_ALL;
sI.cbSize = Marshal.SizeOf(sI);
GetScrollInfo(listView.Handle, 0, ref sI);
if (Math.Abs(hScroll.Value - sI.nPos) >= 6)
{
int scrollDifference = (int)Math.Round((double)((hScroll.Value - sI.nPos) / 6), 0);
if (scrollDifference < 0)
{
scrollDifference = Math.Abs(scrollDifference);
for (int x = 0; x < scrollDifference; x++)
{
SendMessage(listView.Handle, 276, (IntPtr)0, (IntPtr)0);
}
//GetScrollInfo(listView.Handle, 0, ref sI);
//int y0 = sI.nPos;
//SendMessage( listView.Handle,276,(IntPtr) 1,(IntPtr)0 );
//GetScrollInfo(listView.Handle, 0, ref sI);
//MessageBox.Show((sI.nPos - y0).ToString());
}
else
{
for (int x = 0; x < scrollDifference; x++)
{
SendMessage(listView.Handle, 276, (IntPtr)1, (IntPtr)0);
}
}
}
}
/// <summary>
/// Scroll to a vertical position
/// </summary>
/// <param name="treeView">TreeView</param>
/// <param name="si">Scroll information</param>
public static void ScrollToPosition(TreeView treeView, ScrollInfoStruct si)
{
ScrollInfoStruct siOwn = new ScrollInfoStruct();
siOwn.fMask = NativeMethods.SIF_ALL;
siOwn.cbSize = Marshal.SizeOf(si);
NativeMethods.GetScrollInfo(treeView.Handle, NativeMethods.SB_VERT, ref siOwn);
if (siOwn.nPos != si.nPos)
{
NativeMethods.SetScrollInfo(treeView.Handle.ToInt32(), NativeMethods.SB_VERT, ref si, true);
NativeMethods.SendMessageLong(treeView.Handle.ToInt32(), NativeMethods.WM_VSCROLL,
NativeMethods.SB_THUMBTRACK + 0x10000 * si.nPos, 0);
}
}
public int getHorizontalScrollPosition()
{
ScrollInfoStruct sInfo = new ScrollInfoStruct();
sInfo.fMask = 0x4; //(0x1 | 0x2 | 0x4 | 0x10);
sInfo.cbSize = System.Runtime.InteropServices.Marshal.SizeOf(sInfo);
if (GetScrollInfo(this.Handle, 0x1, ref sInfo) >= 0)
{
return(sInfo.nPos);
}
else
{
return(-1);
}
}
protected override void WndProc(ref System.Windows.Forms.Message m)
{
base.WndProc(ref m);
if (m.Msg == WM_VSCROLL)
{
ScrollInfoStruct si = new ScrollInfoStruct();
si.fMask = SIF_ALL;
si.cbSize = (int)Marshal.SizeOf(si);
GetScrollInfo(m.HWnd, SB_VERT, ref si);
if (m.WParam.ToInt32() == SB_ENDSCROLL)
{
ScrollEventArgs sargs = new ScrollEventArgs(ScrollEventType.EndScroll, si.nPos);
this.OnScrollUp();
}
else this.OnScroll();
}
else if (m.Msg == WM_HSCROLL) this.OnScroll();
}
protected override void WndProc(ref System.Windows.Forms.Message msg)
{
if (msg.Msg == WM_VSCROLL)
{
if (Scrolled != null)
{
ScrollInfoStruct si = new ScrollInfoStruct();
Marshal.SizeOf(si);
GetScrollInfo(msg.HWnd, 0, ref si);
if (msg.WParam.ToInt32() == SB_ENDSCROLL)
{
ScrollEventArgs sargs = new ScrollEventArgs(
ScrollEventType.EndScroll,
si.nPos);
Scrolled(this, sargs);
}
}
}
base.WndProc(ref msg);
}
protected override void WndProc(ref System.Windows.Forms.Message msg)
{
if (msg.Msg == WM_HSCROLL)
{
if (OnHorizontalScroll != null)
{
ScrollInfoStruct si = new ScrollInfoStruct();
si.fMask = SIF_ALL;
si.cbSize = Marshal.SizeOf(si);
GetScrollInfo(msg.HWnd, 0, ref si);
if (msg.WParam.ToInt32() == SB_ENDSCROLL)
{
ScrollEventArgs sargs = new ScrollEventArgs(
ScrollEventType.EndScroll,
si.nPos);
OnHorizontalScroll(this, sargs);
}
}
}
if (msg.Msg == WM_VSCROLL)
{
if (OnVerticalScroll != null)
{
ScrollInfoStruct si = new ScrollInfoStruct();
si.fMask = SIF_ALL;
si.cbSize = Marshal.SizeOf(si);
GetScrollInfo(msg.HWnd, 0, ref si);
if (msg.WParam.ToInt32() == SB_ENDSCROLL)
{
ScrollEventArgs sargs = new ScrollEventArgs(
ScrollEventType.EndScroll,
si.nPos);
OnVerticalScroll(this, sargs);
}
}
}
base.WndProc(ref msg);
}
protected override void WndProc(ref System.Windows.Forms.Message msg)
{
if (msg.Msg == WM_HSCROLL)
{
if (OnHorizontalScroll != null)
{
ScrollInfoStruct si = new ScrollInfoStruct();
si.fMask = SIF_ALL;
si.cbSize = Marshal.SizeOf(si);
GetScrollInfo(msg.HWnd, 0, ref si);
if (msg.WParam.ToInt32() == SB_ENDSCROLL)
{
ScrollEventArgs sargs = new ScrollEventArgs(
ScrollEventType.EndScroll,
si.nPos);
OnHorizontalScroll(this, sargs);
}
}
}
if (msg.Msg == WM_VSCROLL)
{
if (OnVerticalScroll != null)
{
ScrollInfoStruct si = new ScrollInfoStruct();
si.fMask = SIF_ALL;
si.cbSize = Marshal.SizeOf(si);
GetScrollInfo(msg.HWnd, 0, ref si);
if (msg.WParam.ToInt32() == SB_ENDSCROLL)
{
ScrollEventArgs sargs = new ScrollEventArgs(
ScrollEventType.EndScroll,
si.nPos);
OnVerticalScroll(this, sargs);
}
}
}
base.WndProc(ref msg);
}
protected override void WndProc(ref System.Windows.Forms.Message m)
{
base.WndProc(ref m);
if (m.Msg == WM_VSCROLL)
{
ScrollInfoStruct si = new ScrollInfoStruct();
si.fMask = SIF_ALL;
si.cbSize = (int)Marshal.SizeOf(si);
GetScrollInfo(m.HWnd, SB_VERT, ref si);
if (m.WParam.ToInt32() == SB_ENDSCROLL)
{
ScrollEventArgs sargs = new ScrollEventArgs(ScrollEventType.EndScroll, si.nPos);
this.OnScrollUp();
}
else
{
this.OnScroll();
}
}
else if (m.Msg == WM_HSCROLL)
{
this.OnScroll();
}
}
private static extern int GetScrollInfo(
IntPtr hWnd, int n, ref ScrollInfoStruct lpScrollInfo);
public int getHorizontalScrollPosition()
{
ScrollInfoStruct sInfo = new ScrollInfoStruct();
sInfo.fMask = 0x4; //(0x1 | 0x2 | 0x4 | 0x10);
sInfo.cbSize = System.Runtime.InteropServices.Marshal.SizeOf(sInfo);
if (GetScrollInfo(this.Handle, 0x1, ref sInfo)>=0)
{
return sInfo.nPos;
}
else
{
return -1;
}
}
private void RefreshScroller()
{
bool hVisible, vVisible;
//Retrieve scroll info
ScrollInfoStruct vSI = new ScrollInfoStruct();
vSI.fMask = SIF_ALL;
vSI.cbSize = Marshal.SizeOf(vSI);
GetScrollInfo(listView.Handle, 1, ref vSI);
ScrollInfoStruct hSI = new ScrollInfoStruct();
hSI.fMask = SIF_ALL;
hSI.cbSize = Marshal.SizeOf(hSI);
GetScrollInfo(listView.Handle, 0, ref hSI);
//Shall we even bother?
if (
hScroll.Value == hSI.nPos && hScroll.Maximum == hSI.nMax &&
vScroll.Value == vSI.nPos && vScroll.Maximum == vSI.nMax
)
{
return;
}
// Vertical Scroll Handling Pwns You!
vScroll.LargeChange = vSI.nPage;
vScroll.Minimum = vSI.nMin;
vScroll.Maximum = vSI.nMax;
vScroll.Value = vSI.nPos;
if ((vScroll.Maximum * 18 + 26) - vScroll.Height <= 1 || !vScroll.Enabled)
{
vScroll.Visible = false;
vVisible = false;
}
else
{
vScroll.Visible = true;
vVisible = true;
}
// Horizontal Scroll Handling Pwns You!
hScroll.LargeChange = hSI.nPage;
hScroll.SmallChange = hSI.nPage;
hScroll.Minimum = hSI.nMin;
hScroll.Maximum = hSI.nMax;
hScroll.Value = hSI.nPos;
if (hScroll.Width - hScroll.Maximum > 0 || !hScroll.Enabled)
{
hScroll.Visible = false;
hVisible = false;
}
else
{
hScroll.Visible = true;
hVisible = true;
}
//Do we need to resize the scrollbars?
if (hVisible && vVisible)
{
lblCornerCover.BackColor = this.BackColor;
lblCornerCover.Visible = true;
}
else
{
lblCornerCover.Visible = false;
}
if (hVisible)
{
vScroll.Height = this.Height - 4 - hScroll.Height;
vScroll.Visible = !vScroll.Visible;
vScroll.Visible = !vScroll.Visible;
}
else
{
vScroll.Height = this.Height - 4;
}
if (vVisible)
{
hScroll.Width = this.Width - 4 - vScroll.Width;
hScroll.Visible = !hScroll.Visible;
hScroll.Visible = !hScroll.Visible;
}
else
{
hScroll.Width = this.Width - 4;
}
}
private static extern int GetScrollInfo(IntPtr hWnd, int n,
ref ScrollInfoStruct lpScrollInfo);
/// <summary>
/// Prevent the combobox dropdown from working
/// http://stackoverflow.com/questions/5337834/prevent-dropdown-area-from-opening-of-combobox-control-in-windows-forms
/// And make it possible to determine which index the user is currently hovering on
/// http://www.codeproject.com/Articles/14255/ComboBox-firing-events-when-hovering-on-the-dropdo
/// </summary>
protected override void WndProc(ref Message m)
{
if (!CanDropDown &&
(m.Msg == 0x201 || // WM_LBUTTONDOWN
m.Msg == 0x203)) // WM_LBUTTONDBLCLK
return;
if (m.Msg == 308)
{
Point LocalMousePosition = this.PointToClient(Cursor.Position);
xPos = LocalMousePosition.X;
yPos = LocalMousePosition.Y - this.Size.Height - 1;
onScreenIndex = 0;
int oldYPos = yPos;
// get the 0-based index of where the cursor is on screen
// as if it were inside the listbox
while (yPos >= this.ItemHeight)
{
yPos -= this.ItemHeight;
onScreenIndex++;
}
//if (yPos < 0) { onScreenIndex = -1; }
ScrollInfoStruct si = new ScrollInfoStruct();
si.fMask = SIF_ALL;
si.cbSize = Marshal.SizeOf(si);
// m.LParam holds the hWnd to the drop down list that appears
int getScrollInfoResult = 0;
getScrollInfoResult = GetScrollInfo(m.LParam, SB_VERT, ref si);
// k returns 0 on error, so if there is no error add the current
// track position of the scrollbar to our index
if (getScrollInfoResult > 0)
{
onScreenIndex += si.nTrackPos;
}
// Check we're actually inside the drop down window that appears and
// not just over its scrollbar before we actually try to update anything
// then if we are raise the Hover event for this comboBox
if (!(xPos > this.Width || xPos < 1 ||
oldYPos < 0 || (oldYPos > this.ItemHeight *
this.MaxDropDownItems)))
{
if (onScreenIndex > this.Items.Count - 1)
hoveredIndex = this.Items.Count - 1;
else
hoveredIndex = onScreenIndex;
//hoveredIndex = (onScreenIndex > this.Items.Count - 1) ?
// this.Items.Count - 1 : onScreenIndex;
}
else
hoveredIndex = -1;
}
base.WndProc(ref m);
}
static extern int SetScrollInfo(IntPtr hwnd, int fnBar, [In] ref ScrollInfoStruct
lpScrollInfo, bool fRedraw);
public static extern int SetScrollInfo(
IntPtr hWnd, int fnBar, ref ScrollInfoStruct lpScrollInfo, bool fRedraw);
public static extern int SetScrollInfo(IntPtr hWnd, int n,
[MarshalAs(UnmanagedType.Struct)] ref ScrollInfoStruct lpcScrollInfo,
bool b);
public static extern int SetScrollInfo( IntPtr hWnd, int fnBar, ref ScrollInfoStruct lpScrollInfo, bool fRedraw );
/// <summary>
/// Returns the vertical scroll position
/// </summary>
/// <param name="treeView">TreeView</param>
/// <param name="si">Scroll information</param>
public static void GetScrollPosition(TreeView treeView, ref ScrollInfoStruct si)
{
si.fMask = NativeMethods.SIF_ALL;
si.cbSize = Marshal.SizeOf(si);
NativeMethods.GetScrollInfo(treeView.Handle, NativeMethods.SB_VERT, ref si);
}
internal static extern int SetScrollInfo(int hWnd, int n,
[MarshalAs(UnmanagedType.Struct)] ref ScrollInfoStruct lpcScrollInfo,
bool b);
