public static extern int DwmUpdateThumbnailProperties(IntPtr hThumb, ref DWM_THUMBNAIL_PROPERTIES props);
private void ShowThumbnailOnEnter(object sender, EventArgs e)
{
ToolStripMenuItem captureWindowItem = sender as ToolStripMenuItem;
WindowDetails window = captureWindowItem.Tag as WindowDetails;
parentMenuBounds = captureWindowItem.GetCurrentParent().TopLevelControl.Bounds;
if (thumbnailForm == null)
{
thumbnailForm = new FormWithoutActivation();
thumbnailForm.ShowInTaskbar = false;
thumbnailForm.FormBorderStyle = FormBorderStyle.None;
thumbnailForm.TopMost = false;
thumbnailForm.Enabled = false;
if (conf.WindowCaptureMode == WindowCaptureMode.Auto || conf.WindowCaptureMode == WindowCaptureMode.Aero)
{
thumbnailForm.BackColor = Color.FromArgb(255, conf.DWMBackgroundColor.R, conf.DWMBackgroundColor.G, conf.DWMBackgroundColor.B);
}
else
{
thumbnailForm.BackColor = Color.White;
}
}
if (thumbnailHandle != IntPtr.Zero)
{
DWM.DwmUnregisterThumbnail(thumbnailHandle);
thumbnailHandle = IntPtr.Zero;
}
DWM.DwmRegisterThumbnail(thumbnailForm.Handle, window.Handle, out thumbnailHandle);
if (thumbnailHandle != IntPtr.Zero)
{
Rectangle windowRectangle = window.WindowRectangle;
int thumbnailHeight = 200;
int thumbnailWidth = (int)(thumbnailHeight * ((float)windowRectangle.Width / (float)windowRectangle.Height));
if (thumbnailWidth > parentMenuBounds.Width)
{
thumbnailWidth = parentMenuBounds.Width;
thumbnailHeight = (int)(thumbnailWidth * ((float)windowRectangle.Height / (float)windowRectangle.Width));
}
thumbnailForm.Width = thumbnailWidth;
thumbnailForm.Height = thumbnailHeight;
// Prepare the displaying of the Thumbnail
DWM_THUMBNAIL_PROPERTIES props = new DWM_THUMBNAIL_PROPERTIES();
props.Opacity = (byte)255;
props.Visible = true;
props.SourceClientAreaOnly = false;
props.Destination = new RECT(0, 0, thumbnailWidth, thumbnailHeight);
DWM.DwmUpdateThumbnailProperties(thumbnailHandle, ref props);
if (!thumbnailForm.Visible)
{
thumbnailForm.Show();
}
// Make sure it's on "top"!
User32.SetWindowPos(thumbnailForm.Handle, captureWindowItem.GetCurrentParent().TopLevelControl.Handle, 0, 0, 0, 0, WindowPos.SWP_NOMOVE | WindowPos.SWP_NOSIZE | WindowPos.SWP_NOACTIVATE);
// Align to menu
Rectangle screenBounds = WindowCapture.GetScreenBounds();
if (screenBounds.Contains(parentMenuBounds.Left, parentMenuBounds.Top - thumbnailHeight))
{
thumbnailForm.Location = new Point(parentMenuBounds.Left + (parentMenuBounds.Width / 2) - (thumbnailWidth / 2), parentMenuBounds.Top - thumbnailHeight);
}
else
{
thumbnailForm.Location = new Point(parentMenuBounds.Left + (parentMenuBounds.Width / 2) - (thumbnailWidth / 2), parentMenuBounds.Bottom);
}
}
}
public static extern int DwmUpdateThumbnailProperties(IntPtr hThumb, ref DWM_THUMBNAIL_PROPERTIES props);
/// <summary>
/// Show the thumbnail of the supplied window above (or under) the parent Control
/// </summary>
/// <param name="window">WindowDetails</param>
/// <param name="parentControl">Control</param>
public void ShowThumbnail(WindowDetails window, Control parentControl) {
UnregisterThumbnail();
DWM.DwmRegisterThumbnail(Handle, window.Handle, out thumbnailHandle);
if (thumbnailHandle != IntPtr.Zero) {
SIZE sourceSize;
DWM.DwmQueryThumbnailSourceSize(thumbnailHandle, out sourceSize);
int thumbnailHeight = 200;
int thumbnailWidth = (int)(thumbnailHeight * ((float)sourceSize.width / (float)sourceSize.height));
if (parentControl != null && thumbnailWidth > parentControl.Width) {
thumbnailWidth = parentControl.Width;
thumbnailHeight = (int)(thumbnailWidth * ((float)sourceSize.height / (float)sourceSize.width));
}
Width = thumbnailWidth;
Height = thumbnailHeight;
// Prepare the displaying of the Thumbnail
DWM_THUMBNAIL_PROPERTIES props = new DWM_THUMBNAIL_PROPERTIES();
props.Opacity = (byte)255;
props.Visible = true;
props.SourceClientAreaOnly = false;
props.Destination = new RECT(0, 0, thumbnailWidth, thumbnailHeight);
DWM.DwmUpdateThumbnailProperties(thumbnailHandle, ref props);
if (parentControl != null) {
AlignToControl(parentControl);
}
if (!Visible) {
Show();
}
// Make sure it's on "top"!
if (parentControl != null) {
User32.SetWindowPos(Handle, parentControl.Handle, 0, 0, 0, 0, WindowPos.SWP_NOMOVE | WindowPos.SWP_NOSIZE | WindowPos.SWP_NOACTIVATE);
}
}
}