wrapper widget

1 files changed, 164 insertions, 0 deletions

diff --git a/src/GraphicObjects/Wrapper.cs b/src/GraphicObjects/Wrapper.cs
new file mode 100644
index 00000000..cfd74524
--- /dev/null
+++ b/src/GraphicObjects/Wrapper.cs
@@ -0,0 +1,164 @@
+//
+//  Wrapper.cs
+//
+//  Author:
+//       Jean-Philippe Bruyère <jp.bruyere@hotmail.com>
+//
+//  Copyright (c) 2016 jp
+//
+//  This program is free software: you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License as published by
+//  the Free Software Foundation, either version 3 of the License, or
+//  (at your option) any later version.
+//
+//  This program is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//  GNU General Public License for more details.
+//
+//  You should have received a copy of the GNU General Public License
+//  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+using System;
+
+namespace Crow
+{
+	public class Wrapper : GenericStack
+	{
+		public Wrapper () : base()
+		{}
+
+		#region Group Overrides
+		public override void ChildrenLayoutingConstraints (ref LayoutingType layoutType)
+		{
+			layoutType &= (~LayoutingType.Positioning);
+		}
+		public override void ComputeChildrenPositions()
+		{
+			int dx = 0;
+			int dy = 0;
+
+			if (Orientation == Orientation.Horizontal) {
+				int tallestChild = 0;
+				foreach (GraphicObject c in Children) {
+					if (!c.Visible)
+						continue;
+					if (dx + c.Slot.Width > ClientRectangle.Width) {
+						dx = 0;
+						dy += tallestChild + Spacing;
+						c.Slot.X = dx;
+						c.Slot.Y = dy;
+						tallestChild = c.Slot.Height;
+					} else {
+						if (tallestChild < c.Slot.Height)
+							tallestChild = c.Slot.Height;
+						c.Slot.X = dx;
+						c.Slot.Y = dy;
+					}
+					dx += c.Slot.Width + Spacing;
+				}
+			} else {
+				int largestChild = 0;
+				foreach (GraphicObject c in Children) {
+					if (!c.Visible)
+						continue;
+					if (dy + c.Slot.Height > ClientRectangle.Height) {
+						dy = 0;
+						dx += largestChild + Spacing;
+						c.Slot.X = dx;
+						c.Slot.Y = dy;
+						largestChild = c.Slot.Width;
+					} else if (largestChild < c.Slot.Width){
+						largestChild = c.Slot.Width;
+						c.Slot.X = dx;
+						c.Slot.Y = dy;
+						dy += c.Slot.Height + Spacing;
+					}
+				}
+			}
+			bmp = null;
+		}
+		public override void OnChildLayoutChanges (object sender, LayoutingEventArgs arg)
+		{
+			//children can't stretch in a wrapper
+			GraphicObject go = sender as GraphicObject;
+			//Debug.WriteLine ("child layout change: " + go.LastSlots.ToString() + " => " + go.Slot.ToString());
+			switch (arg.LayoutType) {
+			case LayoutingType.Width:
+				if (Orientation == Orientation.Vertical && go.Width == Measure.Stretched) {
+					go.Width = Measure.Fit;
+					return;
+				}
+				break;
+			case LayoutingType.Height:
+				if (Orientation == Orientation.Horizontal && go.Height == Measure.Stretched) {
+					go.Height = Measure.Fit;
+					return;
+				}
+				break;
+			default:
+				return;
+			}
+			this.RegisterForLayouting (LayoutingType.ArrangeChildren);
+		}
+		#endregion
+
+		#region GraphicObject Overrides
+		protected override int measureRawSize (LayoutingType lt)
+		{
+			//Wrapper can't fit
+			if (lt == LayoutingType.Width)
+				Width = Measure.Stretched;
+			else
+				Height = Measure.Stretched;
+			return -1;				
+		}
+
+		public override bool UpdateLayout (LayoutingType layoutType)
+		{
+			RegisteredLayoutings &= (~layoutType);
+
+			if (layoutType == LayoutingType.ArrangeChildren) {
+				if ((RegisteredLayoutings & LayoutingType.Sizing) != 0)
+					return false;
+
+				ComputeChildrenPositions ();
+
+				//if no layouting remains in queue for item, registre for redraw
+				if (RegisteredLayoutings == LayoutingType.None && bmp == null)
+					Interface.CurrentInterface.EnqueueForRepaint (this);
+
+				return true;
+			}
+
+			return base.UpdateLayout(layoutType);
+		}
+		public override void OnLayoutChanges (LayoutingType layoutType)
+		{
+			#if DEBUG_LAYOUTING
+			LayoutingQueueItem.currentLQI.Slot = LastSlots;
+			LayoutingQueueItem.currentLQI.Slot = Slot;
+			#endif
+
+			switch (layoutType) {
+			case LayoutingType.Width:
+				foreach (GraphicObject c in Children) {
+					if (c.Width.Units == Unit.Percent)
+						c.RegisterForLayouting (LayoutingType.Width);
+				}
+				break;
+			case LayoutingType.Height:
+				foreach (GraphicObject c in Children) {
+					if (c.Height.Units == Unit.Percent)
+						c.RegisterForLayouting (LayoutingType.Height);
+				}
+				break;
+			default:
+				return;
+			}
+			RegisterForLayouting (LayoutingType.ArrangeChildren);
+			//LayoutChanged.Raise (this, new LayoutingEventArgs (layoutType));
+		}
+		#endregion
+	}
+}
+