/// <summary>
/// Enables custom thumbnails for the form
/// </summary>
/// <param name="e">The arguments for this event</param>
protected override void OnLoad(EventArgs e)
{
if (!DesignMode)
{
TabbedThumbnailNativeMethods.EnableCustomWindowPreview(Handle, true);
}
base.OnLoad(e);
}
public static System.Drawing.Size GetNonClientArea(IntPtr hwnd)
{
var c = new NativePoint();
TabbedThumbnailNativeMethods.ClientToScreen(hwnd, ref c);
var r = new NativeRect();
TabbedThumbnailNativeMethods.GetWindowRect(hwnd, ref r);
return(new System.Drawing.Size(c.X - r.Left, c.Y - r.Top));
}
internal static System.Drawing.Size GetNonClientArea(IntPtr hwnd)
{
var c = new CoreNativeMethods.POINT(0, 0);
TabbedThumbnailNativeMethods.ClientToScreen(hwnd, ref c);
var r = new CoreNativeMethods.RECT();
TabbedThumbnailNativeMethods.GetWindowRect(hwnd, ref r);
return(new System.Drawing.Size(c.X - r.left, c.Y - r.top));
}
public static System.Drawing.Point GetParentOffsetOfChild(IntPtr hwnd, IntPtr hwndParent)
{
var childScreenCoord = new NativePoint();
TabbedThumbnailNativeMethods.ClientToScreen(hwnd, ref childScreenCoord);
var parentScreenCoord = new NativePoint();
TabbedThumbnailNativeMethods.ClientToScreen(hwndParent, ref parentScreenCoord);
System.Drawing.Point offset = new System.Drawing.Point(
childScreenCoord.X - parentScreenCoord.X,
childScreenCoord.Y - parentScreenCoord.Y);
return(offset);
}
/// <summary>
/// Handles taskbar-related messages
/// </summary>
/// <param name="m">A message</param>
protected override void WndProc(ref System.Windows.Forms.Message m)
{
if (m.Msg == (int)TaskbarNativeMethods.WM_DWMSENDICONICTHUMBNAIL)
{
int width = (int)((long)m.LParam >> 16);
int height = (int)(((long)m.LParam) & (0xFFFF));
Size requestedSize = new Size(width, height);
using (Bitmap iconicThumb = GetIconicThumbnail(requestedSize)) {
TabbedThumbnailNativeMethods.SetIconicThumbnail(Handle, iconicThumb.GetHbitmap());
}
}
else if (m.Msg == (int)TaskbarNativeMethods.WM_DWMSENDICONICLIVEPREVIEWBITMAP)
{
using (Bitmap peekBitmap = GetPeekBitmap()) {
TabbedThumbnailNativeMethods.SetPeekBitmap(Handle, peekBitmap.GetHbitmap(), false);
}
}
base.WndProc(ref m);
}
/// <summary>
/// Invalidates the thumbnails
/// </summary>
protected void InvalidateThumbnails()
{
TabbedThumbnailNativeMethods.DwmInvalidateIconicBitmaps(Handle);
}
