public AppBarApi(WindowMovement windowMovement)
{
this.windowMovement = windowMovement;
this.callbackMessage = WinApi.RegisterWindowMessage("MorphicAppBarMessage");
this.windowMovement.Ready += (sender, args) =>
{
// Remove it from alt+tab
// int style = (int) WinApi.GetWindowLong(this.WindowHandle, WinApi.GWL_EXSTYLE);
// style |= WinApi.WS_EX_TOOLWINDOW;
// WinApi.SetWindowLong(this.WindowHandle, WinApi.GWL_EXSTYLE, (IntPtr) style);
};
}
public AppBar(Window window, WindowMovement windowMovement)
{
if (!(window is IAppBarWindow))
{
throw new ArgumentException($"The window must implement {nameof(IAppBarWindow)}.", nameof(window));
}
this.window = window;
this.windowMovement = windowMovement;
this.api = new AppBarApi(this.windowMovement);
// Make the window draggable.
this.window.PreviewMouseDown += this.OnPreviewMouseDown;
this.window.PreviewMouseMove += this.OnPreviewMouseMove;
this.windowMovement.MoveComplete += this.OnMoveComplete;
this.windowMovement.Moving += this.OnMoving;
this.window.Closed += (sender, args) => this.ApplyAppBar(Edge.None);
}
/// <summary>
/// Called when the window is being moved, to re-adjust the window in-flight.
/// </summary>
/// <param name="sender"></param>
/// <param name="args"></param>
private void OnMoving(object?sender, WindowMovement.MovementEventArgs args)
{
args.Handled = true;
if (args.IsFirst)
{
if (this.AppBarEdge == Edge.None)
{
this.floatingSize = args.Rect.Size;
}
else
{
// Un-dock the window so it can be moved.
this.ApplyAppBar(Edge.None);
// Revert to the original size
args.Rect.Size = this.floatingSize;
// If the window is not under the cursor, move it so the cursor is in the centre.
if (args.Rect.X > args.Cursor.X || args.Rect.Right < args.Cursor.X)
{
args.Rect.X = args.Cursor.X - args.Rect.Width / 2;
}
if (args.Rect.Y > args.Cursor.Y || args.Rect.Bottom < args.Cursor.Y)
{
args.Rect.Y = args.Cursor.Y - args.Rect.Height / 2;
}
// Make it look like the window was this size when the move started.
args.InitialRect = args.NewInitialRect = args.Rect;
}
}
// Like magnifier, if the mouse pointer is on the edge then make the window an app bar on that edge.
Point mouse = WindowMovement.GetCursorPos();
Rect workArea = this.windowMovement.GetWorkArea(new Point(mouse.X, mouse.Y));
if (this.EnableDocking)
{
// See what edge the mouse is near (or beyond)
Rect mouseRect = new Rect(
Math.Clamp(mouse.X, workArea.Left, workArea.Right),
Math.Clamp(mouse.Y, workArea.Top, workArea.Bottom), 0, 0);
Edge lastEdge = this.AppBarEdge;
this.AppBarEdge = NearEdges(workArea, mouseRect, 5).First();
if (lastEdge != this.AppBarEdge)
{
this.OnEdgeChanged(this.AppBarEdge, true);
}
}
// Reposition the window to fit the edge.
switch (this.AppBarEdge)
{
case Edge.Left:
case Edge.Right:
args.Rect.Height = workArea.Height;
args.Rect.Width = this.GetGoodSize(new Size(50, args.Rect.Height), Orientation.Vertical, true).Width;
args.Rect.Y = workArea.Top;
if (this.AppBarEdge == Edge.Left)
{
args.Rect.X = workArea.X;
}
else
{
args.Rect.X = workArea.Right - args.Rect.Width;
}
this.window.SizeToContent = SizeToContent.Width;
break;
case Edge.Top:
case Edge.Bottom:
args.Rect.Width = workArea.Width;
args.Rect.Height = this.GetGoodSize(new Size(args.Rect.Width, 50), Orientation.Horizontal, true).Height;
args.Rect.X = workArea.X;
if (this.AppBarEdge == Edge.Top)
{
args.Rect.Y = workArea.Y;
}
else
{
args.Rect.Y = workArea.Bottom - args.Rect.Height;
}
this.window.SizeToContent = SizeToContent.Height;
break;
case Edge.None:
args.Rect = args.SupposedRect;
// Snap to an edge
if (this.SnapToEdges)
{
this.SnapToEdge(this.windowMovement.GetWorkArea(), ref args.Rect, 20);
}
this.window.SizeToContent = SizeToContent.WidthAndHeight;
break;
}
}
