/// <summary>Constructor; initializes the window and constructs the tab thumbnail image to use when dragging.</summary> /// <param name="tab">Tab that was torn out of its parent window.</param> /// <param name="tabRenderer">Renderer instance to use when drawing the actual tab.</param> public TitleBarTornTabForm(TitleBarTabItem tab, BaseTabRenderer tabRenderer, IMessageFilter messageFilter) { m_messageFilter = messageFilter; m_layeredWindow = new LayeredWindow(); m_initialized = false; // Set drawing styles SetStyle(ControlStyles.DoubleBuffer, true); // This should show up as a semi-transparent borderless window Opacity = 0.70; ShowInTaskbar = false; FormBorderStyle = FormBorderStyle.None; // ReSharper disable DoNotCallOverridableMethodsInConstructor BackColor = Color.Fuchsia; // ReSharper restore DoNotCallOverridableMethodsInConstructor TransparencyKey = Color.Fuchsia; AllowTransparency = true; Disposed += TornTabForm_Disposed; // Get the tab thumbnail (full size) and then draw the actual representation of the tab onto it as well Bitmap tabContents = tab.GetImage(); Bitmap contentsAndTab = new Bitmap(tabContents.Width, tabContents.Height + tabRenderer.TabHeight, tabContents.PixelFormat); Graphics tabGraphics = Graphics.FromImage(contentsAndTab); tabGraphics.DrawImage(tabContents, 0, tabRenderer.TabHeight); bool oldShowAddButton = tabRenderer.ShowAddButton; tabRenderer.ShowAddButton = false; tabRenderer.Render( new ListWithEvents <TitleBarTabItem> { tab }, tabGraphics, new Point(0, 0), new Point(0, 0), true); tabRenderer.ShowAddButton = oldShowAddButton; // Scale the thumbnail down to half size m_tabThumbnail = new Bitmap(contentsAndTab.Width / 2, contentsAndTab.Height / 2, contentsAndTab.PixelFormat); Graphics thumbnailGraphics = Graphics.FromImage(m_tabThumbnail); thumbnailGraphics.InterpolationMode = InterpolationMode.High; thumbnailGraphics.CompositingQuality = CompositingQuality.HighQuality; thumbnailGraphics.SmoothingMode = SmoothingMode.AntiAlias; thumbnailGraphics.DrawImage(contentsAndTab, 0, 0, m_tabThumbnail.Width, m_tabThumbnail.Height); Width = m_tabThumbnail.Width - 1; Height = m_tabThumbnail.Height - 1; m_cursorOffset = new Point(tabRenderer.TabContentWidth / 4, tabRenderer.TabHeight / 4); SetWindowPosition(Cursor.Position); }