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@ -6,6 +6,8 @@ |
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// </file>
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// </file>
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using System; |
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using System; |
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using System.Collections.Generic; |
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using System.Collections.ObjectModel; |
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using System.Diagnostics; |
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using System.Diagnostics; |
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using System.Windows; |
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using System.Windows; |
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using System.Windows.Input; |
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using System.Windows.Input; |
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@ -20,7 +22,7 @@ namespace ICSharpCode.WpfDesign |
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public sealed class PlacementOperation |
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public sealed class PlacementOperation |
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{ |
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{ |
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readonly ChangeGroup changeGroup; |
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readonly ChangeGroup changeGroup; |
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readonly DesignItem placedItem; |
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readonly ReadOnlyCollection<PlacementInformation> placedItems; |
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readonly PlacementType type; |
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readonly PlacementType type; |
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readonly DesignItem oldContainer; |
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readonly DesignItem oldContainer; |
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readonly IPlacementBehavior oldContainerBehavior; |
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readonly IPlacementBehavior oldContainerBehavior; |
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@ -30,10 +32,10 @@ namespace ICSharpCode.WpfDesign |
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#region Properties
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#region Properties
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/// <summary>
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/// <summary>
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/// The item being placed.
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/// The items being placed.
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/// </summary>
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/// </summary>
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public DesignItem PlacedItem { |
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public ReadOnlyCollection<PlacementInformation> PlacedItems { |
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get { return placedItem; } |
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get { return placedItems; } |
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} |
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} |
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/// <summary>
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/// <summary>
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@ -57,12 +59,6 @@ namespace ICSharpCode.WpfDesign |
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get { return isCommitted; } |
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get { return isCommitted; } |
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} |
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} |
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/// <summary>
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/// The position of the left/right/top/bottom side in the coordinate system of the parent container.
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/// These values must be set by IPlacementBehavior.StartPlacement and are updated by the drag operation.
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/// </summary>
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public double Left, Right, Top, Bottom; |
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/// <summary>
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/// <summary>
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/// Gets the current container for the placement operation.
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/// Gets the current container for the placement operation.
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/// </summary>
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/// </summary>
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@ -79,6 +75,7 @@ namespace ICSharpCode.WpfDesign |
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#endregion
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#endregion
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#region Container changing
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/// <summary>
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/// <summary>
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/// Make the placed item switch the container.
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/// Make the placed item switch the container.
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/// This method assumes that you already have checked if changing the container is possible.
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/// This method assumes that you already have checked if changing the container is possible.
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@ -93,6 +90,12 @@ namespace ICSharpCode.WpfDesign |
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try { |
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try { |
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currentContainerBehavior.LeaveContainer(this); |
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currentContainerBehavior.LeaveContainer(this); |
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System.Windows.Media.GeneralTransform transform = currentContainer.View.TransformToVisual(newContainer.View); |
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foreach (PlacementInformation info in placedItems) { |
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info.OriginalBounds = transform.TransformBounds(info.OriginalBounds); |
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info.Bounds = transform.TransformBounds(info.Bounds); |
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} |
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currentContainer = newContainer; |
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currentContainer = newContainer; |
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currentContainerBehavior = newContainer.GetBehavior<IPlacementBehavior>(); |
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currentContainerBehavior = newContainer.GetBehavior<IPlacementBehavior>(); |
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@ -104,63 +107,82 @@ namespace ICSharpCode.WpfDesign |
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throw; |
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throw; |
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} |
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} |
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} |
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} |
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#endregion
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#region Start
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#region Start
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/// <summary>
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/// <summary>
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/// Starts a new placement operation that changes the placement of <paramref name="placedItem"/>.
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/// Starts a new placement operation that changes the placement of <paramref name="placedItem"/>.
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/// </summary>
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/// </summary>
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/// <param name="placedItem">The item to be placed.</param>
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/// <param name="placedItems">The items to be placed.</param>
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/// <param name="type">The type of the placement.</param>
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/// <param name="type">The type of the placement.</param>
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/// <returns>A PlacementOperation object.</returns>
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/// <returns>A PlacementOperation object.</returns>
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/// <remarks>
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/// <remarks>
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/// You MUST call either <see cref="Abort"/> or <see cref="Commit"/> on the returned PlacementOperation
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/// You MUST call either <see cref="Abort"/> or <see cref="Commit"/> on the returned PlacementOperation
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/// once you are done with it, otherwise a ChangeGroup will be left open and Undo/Redo will fail to work!
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/// once you are done with it, otherwise a ChangeGroup will be left open and Undo/Redo will fail to work!
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/// </remarks>
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/// </remarks>
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public static PlacementOperation Start(DesignItem placedItem, PlacementType type) |
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public static PlacementOperation Start(ICollection<DesignItem> placedItems, PlacementType type) |
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{ |
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{ |
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if (placedItem == null) |
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if (placedItems == null) |
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throw new ArgumentNullException("placedItem"); |
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throw new ArgumentNullException("placedItems"); |
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if (type == null) |
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if (type == null) |
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throw new ArgumentNullException("type"); |
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throw new ArgumentNullException("type"); |
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PlacementOperation op = new PlacementOperation(placedItem, type); |
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DesignItem[] items = Func.ToArray(placedItems); |
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if (items.Length == 0) |
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throw new ArgumentException("placedItems.Length must be > 0"); |
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PlacementOperation op = new PlacementOperation(items, type); |
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try { |
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try { |
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if (op.currentContainerBehavior == null) |
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if (op.currentContainerBehavior == null) |
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throw new InvalidOperationException("Starting the operation is not supported"); |
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throw new InvalidOperationException("Starting the operation is not supported"); |
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op.Left = op.Top = op.Bottom = op.Right = double.NaN; |
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op.currentContainerBehavior.StartPlacement(op); |
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op.currentContainerBehavior.BeginPlacement(op); |
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if (double.IsNaN(op.Left) || double.IsNaN(op.Top) || double.IsNaN(op.Bottom) || double.IsNaN(op.Right)) |
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foreach (PlacementInformation info in op.placedItems) { |
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throw new InvalidOperationException("IPlacementBehavior.StartPlacement must set Left,Top,Right+Bottom to non-NAN values"); |
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info.OriginalBounds = op.currentContainerBehavior.GetPosition(op, info.Item); |
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info.Bounds = info.OriginalBounds; |
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} |
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} catch { |
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} catch { |
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op.changeGroup.Abort(); |
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op.changeGroup.Abort(); |
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throw; |
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throw; |
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} |
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} |
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return op; |
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return op; |
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} |
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} |
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private PlacementOperation(DesignItem placedItem, PlacementType type) |
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private PlacementOperation(DesignItem[] items, PlacementType type) |
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{ |
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{ |
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this.placedItem = placedItem; |
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PlacementInformation[] information = new PlacementInformation[items.Length]; |
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for (int i = 0; i < information.Length; i++) { |
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information[i] = new PlacementInformation(items[i], this); |
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} |
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this.placedItems = new ReadOnlyCollection<PlacementInformation>(information); |
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this.type = type; |
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this.type = type; |
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this.oldContainer = placedItem.Parent; |
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this.oldContainer = items[0].Parent; |
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this.oldContainerBehavior = GetPlacementBehavior(placedItem); |
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this.oldContainerBehavior = GetPlacementBehavior(items); |
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this.currentContainer = oldContainer; |
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this.currentContainer = oldContainer; |
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this.currentContainerBehavior = oldContainerBehavior; |
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this.currentContainerBehavior = oldContainerBehavior; |
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this.changeGroup = placedItem.OpenGroup(type.ToString()); |
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this.changeGroup = items[0].Context.OpenGroup(type.ToString(), items); |
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} |
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} |
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/// <summary>
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/// <summary>
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/// Gets the placement behavior associated with the specified item.
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/// Gets the placement behavior associated with the specified items.
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/// </summary>
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/// </summary>
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public static IPlacementBehavior GetPlacementBehavior(DesignItem item) |
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public static IPlacementBehavior GetPlacementBehavior(ICollection<DesignItem> items) |
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{ |
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{ |
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if (item == null) |
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if (items == null) |
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throw new ArgumentNullException("item"); |
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throw new ArgumentNullException("items"); |
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if (item.Parent != null) { |
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if (items.Count == 0) |
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return item.Parent.GetBehavior<IPlacementBehavior>(); |
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return null; |
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} else { |
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DesignItem parent = Func.First(items).Parent; |
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return item.GetBehavior<IRootPlacementBehavior>(); |
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foreach (DesignItem item in Func.Skip(items, 1)) { |
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if (item.Parent != parent) |
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return null; |
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} |
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} |
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if (parent != null) |
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return parent.GetBehavior<IPlacementBehavior>(); |
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else if (items.Count == 1) |
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return Func.First(items).GetBehavior<IRootPlacementBehavior>(); |
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else |
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return null; |
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} |
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} |
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#endregion
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#endregion
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@ -183,7 +205,7 @@ namespace ICSharpCode.WpfDesign |
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if (isCommitted) |
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if (isCommitted) |
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throw new InvalidOperationException("PlacementOperation is committed."); |
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throw new InvalidOperationException("PlacementOperation is committed."); |
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isAborted = true; |
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isAborted = true; |
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currentContainerBehavior.FinishPlacement(this); |
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currentContainerBehavior.EndPlacement(this); |
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changeGroup.Abort(); |
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changeGroup.Abort(); |
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} |
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} |
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} |
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} |
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@ -197,7 +219,7 @@ namespace ICSharpCode.WpfDesign |
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if (isAborted || isCommitted) |
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if (isAborted || isCommitted) |
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throw new InvalidOperationException("PlacementOperation is already aborted/committed."); |
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throw new InvalidOperationException("PlacementOperation is already aborted/committed."); |
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isCommitted = true; |
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isCommitted = true; |
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currentContainerBehavior.FinishPlacement(this); |
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currentContainerBehavior.EndPlacement(this); |
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changeGroup.Commit(); |
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changeGroup.Commit(); |
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} |
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} |
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#endregion
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#endregion
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Daniel Grunwald
19 years ago