/// <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 TornTabForm(TitleBarTab tab, BaseTabRenderer tabRenderer)
{
_layeredWindow = new LayeredWindow();
_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 List<TitleBarTab>
{
tab
}, tabGraphics, new Point(0, 0), new Point(0, 0), true);
tabRenderer.ShowAddButton = oldShowAddButton;
// Scale the thumbnail down to half size
_tabThumbnail = new Bitmap(contentsAndTab.Width / 2, contentsAndTab.Height / 2, contentsAndTab.PixelFormat);
Graphics thumbnailGraphics = Graphics.FromImage(_tabThumbnail);
thumbnailGraphics.InterpolationMode = InterpolationMode.High;
thumbnailGraphics.CompositingQuality = CompositingQuality.HighQuality;
thumbnailGraphics.SmoothingMode = SmoothingMode.AntiAlias;
thumbnailGraphics.DrawImage(contentsAndTab, 0, 0, _tabThumbnail.Width, _tabThumbnail.Height);
Width = _tabThumbnail.Width - 1;
Height = _tabThumbnail.Height - 1;
_cursorOffset = new Point(tabRenderer.TabContentWidth / 4, tabRenderer.TabHeight / 4);
SetWindowPosition(Cursor.Position);
}
