VisualPascalABCNET/FormsDesignerBinding/Dependecies/src/Main/ICSharpCode.SharpDevelop.Widgets/Project/StackPanelWithSpacing.cs - master - n-dimens/pascalabcnet

VisualPascalABCNET/FormsDesignerBinding/Dependecies/src/Main/ICSharpCode.SharpDevelop.Widgets/Project/StackPanelWithSpacing.cs

97 строк3 KB

Бондарев Иван

initial commit

14 май 2015, 22:35

14 май 2015, 22:35e6e67c1

// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)

using System;
using System.Windows;
using System.Windows.Controls;

namespace ICSharpCode.SharpDevelop.Widgets
{
	/// <summary>
	/// StackPanel with spacing between elements.
	/// Unlike actual StackPanel, this one does not support virtualized scrolling.
	/// </summary>
	public class StackPanelWithSpacing : Panel
	{
		public static readonly DependencyProperty OrientationProperty =
			DependencyProperty.Register("Orientation", typeof(Orientation), typeof(StackPanelWithSpacing),
			                            new FrameworkPropertyMetadata(Orientation.Vertical, FrameworkPropertyMetadataOptions.AffectsMeasure));
		
		public Orientation Orientation {
			get { return (Orientation)GetValue(OrientationProperty); }
			set { SetValue(OrientationProperty, value); }
		}
		
		public static readonly DependencyProperty SpaceBetweenItemsProperty =
			DependencyProperty.Register("SpaceBetweenItems", typeof(double), typeof(StackPanelWithSpacing),
			                            new FrameworkPropertyMetadata(0.0, FrameworkPropertyMetadataOptions.AffectsMeasure));
		
		public double SpaceBetweenItems {
			get { return (double)GetValue(SpaceBetweenItemsProperty); }
			set { SetValue(SpaceBetweenItemsProperty, value); }
		}
		
		protected override bool HasLogicalOrientation {
			get { return true; }
		}
		
		protected override Orientation LogicalOrientation {
			get { return this.Orientation; }
		}
		
		protected override Size MeasureOverride(Size availableSize)
		{
			Orientation orientation = this.Orientation;
			if (orientation == Orientation.Horizontal) {
				availableSize.Width = double.PositiveInfinity;
			} else {
				availableSize.Height = double.PositiveInfinity;
			}
			double spaceBetweenItems = this.SpaceBetweenItems;
			double pos = 0;
			double maxWidth = 0;
			bool hasVisibleItems = false;
			foreach (UIElement element in this.InternalChildren) {
				element.Measure(availableSize);
				Size desiredSize = element.DesiredSize;
				if (orientation == Orientation.Horizontal) {
					maxWidth = Math.Max(maxWidth, desiredSize.Height);
					pos += desiredSize.Width;
				} else {
					maxWidth = Math.Max(maxWidth, desiredSize.Width);
					pos += desiredSize.Height;
				}
				if (element.Visibility != Visibility.Collapsed) {
					pos += spaceBetweenItems;
					hasVisibleItems = true;
				}
			}
			if (hasVisibleItems)
				pos -= spaceBetweenItems;
			if (orientation == Orientation.Horizontal)
				return new Size(pos, maxWidth);
			else
				return new Size(maxWidth, pos);
		}
		
		protected override Size ArrangeOverride(Size finalSize)
		{
			Orientation orientation = this.Orientation;
			double spaceBetweenItems = this.SpaceBetweenItems;
			double pos = 0;
			foreach (UIElement element in this.InternalChildren) {
				if (orientation == Orientation.Horizontal) {
					element.Arrange(new Rect(pos, 0, element.DesiredSize.Width, finalSize.Height));
					pos += element.DesiredSize.Width;
				} else {
					element.Arrange(new Rect(0, pos, finalSize.Width, element.DesiredSize.Height));
					pos += element.DesiredSize.Height;
				}
				if (element.Visibility != Visibility.Collapsed) {
					pos += spaceBetweenItems;
				}
			}
			return finalSize;
		}
	}
}