public void RemoveToolTip(IntPtr toolTipId)
{
NativeMethods.TOOLINFO_T toolInfo = new NativeMethods.TOOLINFO_T();
toolInfo.cbSize = Marshal.SizeOf(toolInfo);
toolInfo.hwnd = dataGrid.Handle;
toolInfo.uId = toolTipId;
UnsafeNativeMethods.SendMessage(new HandleRef(tipWindow, tipWindow.Handle), NativeMethods.TTM_DELTOOL, 0, toolInfo);
}
/// <include file='doc\ToolTip.uex' path='docs/doc[@for="ToolTip.GetMinTOOLINFO"]/*' />
/// <devdoc>
/// Returns a new instance of the TOOLINFO_T structure with the minimum
/// required data to uniquely identify a region. This is used primarily
/// for delete operations. NOTE: This cannot force the creation of a handle.
/// </devdoc>
/// <internalonly/>
private NativeMethods.TOOLINFO_T GetMinTOOLINFO(Control ctl)
{
NativeMethods.TOOLINFO_T ti = new NativeMethods.TOOLINFO_T();
ti.cbSize = Marshal.SizeOf(typeof(NativeMethods.TOOLINFO_T));
ti.hwnd = IntPtr.Zero;
ti.uFlags |= NativeMethods.TTF_IDISHWND;
ti.uId = ctl.Handle;
return(ti);
}
// this function will add a toolTip to the
// windows system
public void AddToolTip(string toolTipString, IntPtr toolTipId, Rectangle iconBounds)
{
Debug.Assert(tipWindow != null && tipWindow.Handle != IntPtr.Zero, "the tipWindow was not initialized, bailing out");
if (iconBounds.IsEmpty)
{
throw new ArgumentNullException(nameof(iconBounds), SR.DataGridToolTipEmptyIcon);
}
NativeMethods.TOOLINFO_T toolInfo = new NativeMethods.TOOLINFO_T();
toolInfo.cbSize = Marshal.SizeOf(toolInfo);
toolInfo.hwnd = dataGrid.Handle;
toolInfo.uId = toolTipId;
toolInfo.lpszText = toolTipString ?? throw new ArgumentNullException(nameof(toolTipString));
toolInfo.rect = NativeMethods.RECT.FromXYWH(iconBounds.X, iconBounds.Y, iconBounds.Width, iconBounds.Height);
toolInfo.uFlags = NativeMethods.TTF_SUBCLASS;
UnsafeNativeMethods.SendMessage(new HandleRef(tipWindow, tipWindow.Handle), NativeMethods.TTM_ADDTOOL, 0, toolInfo);
}
private NativeMethods.TOOLINFO_T GetTOOLINFO(Control c)
{
int index = Array.IndexOf(controls, c);
Debug.Assert(index != -1, "Failed to find control in tooltip array");
if (toolInfos[index] == null)
{
toolInfos[index] = new NativeMethods.TOOLINFO_T();
toolInfos[index].cbSize = Marshal.SizeOf <NativeMethods.TOOLINFO_T>();
toolInfos[index].uFlags |= NativeMethods.TTF_IDISHWND | NativeMethods.TTF_TRANSPARENT | NativeMethods.TTF_SUBCLASS;
}
toolInfos[index].lpszText = this.toolTipText;
toolInfos[index].hwnd = c.Handle;
toolInfos[index].uId = c.Handle;
return(toolInfos[index]);
}
/// <include file='doc\ToolTip.uex' path='docs/doc[@for="ToolTip.GetTOOLINFO"]/*' />
/// <devdoc>
/// Returns a detailed TOOLINFO_T structure that represents the specified
/// region. NOTE: This may force the creation of a handle.
/// </devdoc>
/// <internalonly/>
private NativeMethods.TOOLINFO_T GetTOOLINFO(Control ctl, string caption)
{
NativeMethods.TOOLINFO_T ti = GetMinTOOLINFO(ctl);
ti.cbSize = Marshal.SizeOf(typeof(NativeMethods.TOOLINFO_T));
ti.uFlags |= NativeMethods.TTF_TRANSPARENT | NativeMethods.TTF_SUBCLASS;
// RightToLeft reading order
//
Control richParent = TopLevelControl;
if (richParent != null && richParent.RightToLeft == RightToLeft.Yes)
{
ti.uFlags |= NativeMethods.TTF_RTLREADING;
}
ti.lpszText = caption;
return(ti);
}
