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ICSharpCode.TextEditor/Project/Src/Util/TipSplitter.cs

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+// <file>
+//     <copyright see="prj:///doc/copyright.txt"/>
+//     <license see="prj:///doc/license.txt"/>
+//     <owner name="none" email=""/>
+//     <version>$Revision$</version>
+// </file>
+
+using System;
+using System.Diagnostics;
+using System.Drawing;
+
+namespace ICSharpCode.TextEditor.Util
+{
+	class TipSplitter: TipSection
+	{
+		bool         isHorizontal;
+		float     [] offsets;
+		TipSection[] tipSections;
+		
+		public TipSplitter(Graphics graphics, bool horizontal, params TipSection[] sections): base(graphics)
+		{
+			Debug.Assert(sections != null);
+			
+			isHorizontal = horizontal;
+			offsets = new float[sections.Length];
+			tipSections = (TipSection[])sections.Clone();	
+		}
+		
+		public override void Draw(PointF location)
+		{
+			if (isHorizontal) {
+				for (int i = 0; i < tipSections.Length; i ++) {
+					tipSections[i].Draw
+						(new PointF(location.X + offsets[i], location.Y));
+				}
+			} else {
+				for (int i = 0; i < tipSections.Length; i ++) {
+					tipSections[i].Draw
+						(new PointF(location.X, location.Y + offsets[i]));
+				}
+			}
+		}
+		
+		protected override void OnMaximumSizeChanged()
+		{
+			base.OnMaximumSizeChanged();
+			
+			float currentDim = 0;
+			float otherDim = 0;
+			SizeF availableArea = MaximumSize;
+			
+			for (int i = 0; i < tipSections.Length; i ++) {
+				TipSection section = (TipSection)tipSections[i];
+			
+				section.SetMaximumSize(availableArea);
+				
+				SizeF requiredArea = section.GetRequiredSize();
+				offsets[i] = currentDim;
+
+				// It's best to start on pixel borders, so this will
+				// round up to the nearest pixel. Otherwise there are
+				// weird cutoff artifacts.
+				float pixelsUsed;
+				
+				if (isHorizontal) {
+					pixelsUsed  = (float)Math.Ceiling(requiredArea.Width);
+					currentDim += pixelsUsed;
+					
+					availableArea.Width = Math.Max
+						(0, availableArea.Width - pixelsUsed);
+					
+					otherDim = Math.Max(otherDim, requiredArea.Height);
+				} else {
+					pixelsUsed  = (float)Math.Ceiling(requiredArea.Height);
+					currentDim += pixelsUsed;
+					
+					availableArea.Height = Math.Max
+						(0, availableArea.Height - pixelsUsed);
+					
+					otherDim = Math.Max(otherDim, requiredArea.Width);
+				}
+			}
+			
+			foreach (TipSection section in tipSections) {
+				if (isHorizontal) {
+					section.SetAllocatedSize(new SizeF(section.GetRequiredSize().Width, otherDim));
+				} else {
+					section.SetAllocatedSize(new SizeF(otherDim, section.GetRequiredSize().Height));
+				}
+			}
+
+			if (isHorizontal) {
+				SetRequiredSize(new SizeF(currentDim, otherDim));
+			} else {
+				SetRequiredSize(new SizeF(otherDim, currentDim));
+			}
+		}
+	}
+}