moved Dialogs to Windows

Terminal.Gui/Core/Window.cs

@@ -0,0 +1,250 @@
+//
+// Core.cs: The core engine for gui.cs
+//
+// Authors:
+//   Miguel de Icaza (miguel@gnome.org)
+//
+// Pending:
+//   - Check for NeedDisplay on the hierarchy and repaint
+//   - Layout support
+//   - "Colors" type or "Attributes" type?
+//   - What to surface as "BackgroundCOlor" when clearing a window, an attribute or colors?
+//
+// Optimziations
+//   - Add rendering limitation to the exposed area
+using System.Collections;
+using System.Linq;
+using NStack;
+
+namespace Terminal.Gui {
+	/// <summary>
+	/// A <see cref="Toplevel"/> <see cref="View"/> that draws a frame around its region and has a "ContentView" subview where the contents are added.
+	/// </summary>
+	public class Window : Toplevel, IEnumerable {
+		View contentView;
+		ustring title;
+
+		/// <summary>
+		/// The title to be displayed for this window.
+		/// </summary>
+		/// <value>The title.</value>
+		public ustring Title {
+			get => title;
+			set {
+				title = value;
+				SetNeedsDisplay ();
+			}
+		}
+
+		class ContentView : View {
+			public ContentView (Rect frame) : base (frame) { }
+			public ContentView () : base () { }
+#if false
+			public override void Redraw (Rect region)
+			{
+				Driver.SetAttribute (ColorScheme.Focus);
+
+				for (int y = 0; y < Frame.Height; y++) {
+					Move (0, y);
+					for (int x = 0; x < Frame.Width; x++) {
+
+						Driver.AddRune ('x');
+					}
+				}
+			}
+#endif
+		}
+
+		/// <summary>
+		/// Initializes a new instance of the <see cref="Gui.Window"/> class with an optional title and a set frame.
+		/// </summary>
+		/// <param name="frame">Frame.</param>
+		/// <param name="title">Title.</param>
+		public Window (Rect frame, ustring title = null) : this (frame, title, padding: 0)
+		{
+		}
+
+		/// <summary>
+		/// Initializes a new instance of the <see cref="Window"/> class with an optional title.
+		/// </summary>
+		/// <param name="title">Title.</param>
+		public Window (ustring title = null) : this (title, padding: 0)
+		{
+		}
+
+		int padding;
+		/// <summary>
+		/// Initializes a new instance of the <see cref="Window"/> with
+		/// the specified frame for its location, with the specified border
+		/// an optional title.
+		/// </summary>
+		/// <param name="frame">Frame.</param>
+		/// <param name="padding">Number of characters to use for padding of the drawn frame.</param>
+		/// <param name="title">Title.</param>
+		public Window (Rect frame, ustring title = null, int padding = 0) : base (frame)
+		{
+			this.Title = title;
+			int wb = 2 * (1 + padding);
+			this.padding = padding;
+			var cFrame = new Rect (1 + padding, 1 + padding, frame.Width - wb, frame.Height - wb);
+			contentView = new ContentView (cFrame);
+			base.Add (contentView);
+		}
+
+		/// <summary>
+		/// Initializes a new instance of the <see cref="Window"/> with
+		/// the specified frame for its location, with the specified border
+		/// an optional title.
+		/// </summary>
+		/// <param name="padding">Number of characters to use for padding of the drawn frame.</param>
+		/// <param name="title">Title.</param>
+		public Window (ustring title = null, int padding = 0) : base ()
+		{
+			this.Title = title;
+			int wb = 1 + padding;
+			this.padding = padding;
+			contentView = new ContentView () {
+				X = wb,
+				Y = wb,
+				Width = Dim.Fill (wb),
+				Height = Dim.Fill (wb)
+			};
+			base.Add (contentView);
+		}
+
+		/// <summary>
+		/// Enumerates the various <see cref="View"/>s in the embedded <see cref="ContentView"/>.
+		/// </summary>
+		/// <returns>The enumerator.</returns>
+		public new IEnumerator GetEnumerator ()
+		{
+			return contentView.GetEnumerator ();
+		}
+
+		/// <summary>
+		/// Add the specified view to the <see cref="ContentView"/>.
+		/// </summary>
+		/// <param name="view">View to add to the window.</param>
+		public override void Add (View view)
+		{
+			contentView.Add (view);
+			if (view.CanFocus)
+				CanFocus = true;
+		}
+
+
+		/// <summary>
+		///   Removes a widget from this container.
+		/// </summary>
+		/// <remarks>
+		/// </remarks>
+		public override void Remove (View view)
+		{
+			if (view == null)
+				return;
+
+			SetNeedsDisplay ();
+			var touched = view.Frame;
+			contentView.Remove (view);
+
+			if (contentView.InternalSubviews.Count < 1)
+				this.CanFocus = false;
+		}
+
+		/// <summary>
+		///   Removes all widgets from this container.
+		/// </summary>
+		/// <remarks>
+		/// </remarks>
+		public override void RemoveAll ()
+		{
+			contentView.RemoveAll ();
+		}
+
+		///<inheritdoc cref="Redraw"/>
+		public override void Redraw (Rect bounds)
+		{
+			Application.CurrentView = this;
+			var scrRect = RectToScreen (new Rect (0, 0, Frame.Width, Frame.Height));
+			var savedClip = Driver.Clip;
+			Driver.Clip = ScreenClip (RectToScreen (Bounds));
+
+			if (NeedDisplay != null && !NeedDisplay.IsEmpty) {
+				Driver.SetAttribute (ColorScheme.Normal);
+				Driver.DrawFrame (scrRect, padding, true);
+			}
+			contentView.Redraw (contentView.Bounds);
+			ClearNeedsDisplay ();
+			Driver.SetAttribute (ColorScheme.Normal);
+			Driver.DrawFrame (scrRect, padding, false);
+
+			if (HasFocus)
+				Driver.SetAttribute (ColorScheme.HotNormal);
+			Driver.DrawWindowTitle (scrRect, Title, padding, padding, padding, padding);
+			Driver.Clip = savedClip;
+			Driver.SetAttribute (ColorScheme.Normal);
+		}
+
+		//
+		// FIXED:It does not look like the event is raised on clicked-drag
+		// need to figure that out.
+		//
+		internal static Point? dragPosition;
+		Point start;
+		///<inheritdoc cref="MouseEvent(Gui.MouseEvent)"/>
+		public override bool MouseEvent (MouseEvent mouseEvent)
+		{
+			// FIXED:The code is currently disabled, because the
+			// Driver.UncookMouse does not seem to have an effect if there is
+			// a pending mouse event activated.
+
+			int nx, ny;
+			if ((mouseEvent.Flags == (MouseFlags.Button1Pressed | MouseFlags.ReportMousePosition) ||
+				mouseEvent.Flags == MouseFlags.Button3Pressed)) {
+				if (dragPosition.HasValue) {
+					if (SuperView == null) {
+						Application.Top.SetNeedsDisplay (Frame);
+						Application.Top.Redraw (Frame);
+					} else {
+						SuperView.SetNeedsDisplay (Frame);
+					}
+					EnsureVisibleBounds (this, mouseEvent.X + mouseEvent.OfX - start.X,
+						mouseEvent.Y + mouseEvent.OfY, out nx, out ny);
+
+					dragPosition = new Point (nx, ny);
+					Frame = new Rect (nx, ny, Frame.Width, Frame.Height);
+					X = nx;
+					Y = ny;
+					//Demo.ml2.Text = $"{dx},{dy}";
+
+					// FIXED: optimize, only SetNeedsDisplay on the before/after regions.
+					SetNeedsDisplay ();
+					return true;
+				} else {
+					// Only start grabbing if the user clicks on the title bar.
+					if (mouseEvent.Y == 0) {
+						start = new Point (mouseEvent.X, mouseEvent.Y);
+						dragPosition = new Point ();
+						nx = mouseEvent.X - mouseEvent.OfX;
+						ny = mouseEvent.Y - mouseEvent.OfY;
+						dragPosition = new Point (nx, ny);
+						Application.GrabMouse (this);
+					}
+
+					//Demo.ml2.Text = $"Starting at {dragPosition}";
+					return true;
+				}
+			}
+
+			if (mouseEvent.Flags == MouseFlags.Button1Released && dragPosition.HasValue) {
+				Application.UngrabMouse ();
+				Driver.UncookMouse ();
+				dragPosition = null;
+			}
+
+			//Demo.ml.Text = me.ToString ();
+			return false;
+		}
+
+	}
+}