diff options
Diffstat (limited to 'MediaBrowser.UI.Controls/ScrollingPanel.cs')
| -rw-r--r-- | MediaBrowser.UI.Controls/ScrollingPanel.cs | 404 |
1 files changed, 0 insertions, 404 deletions
diff --git a/MediaBrowser.UI.Controls/ScrollingPanel.cs b/MediaBrowser.UI.Controls/ScrollingPanel.cs deleted file mode 100644 index 636661f54..000000000 --- a/MediaBrowser.UI.Controls/ScrollingPanel.cs +++ /dev/null @@ -1,404 +0,0 @@ -using System; -using System.Windows; -using System.Windows.Controls; -using System.Windows.Controls.Primitives; -using System.Windows.Media; -using System.Windows.Media.Animation; - -namespace MediaBrowser.UI.Controls -{ - /// <summary> - /// This started from: - /// http://www.switchonthecode.com/tutorials/wpf-tutorial-implementing-iscrollinfo - /// Then, after implementing this, content was being displayed in stack panel like manner. - /// I then reviewed the source code of ScrollContentPresenter and updated MeasureOverride and ArrangeOverride to match. - /// </summary> - public class ScrollingPanel : Grid, IScrollInfo - { - /// <summary> - /// The infinite size - /// </summary> - private static Size InfiniteSize = new Size(double.PositiveInfinity, double.PositiveInfinity); - /// <summary> - /// The line size - /// </summary> - private const double LineSize = 16; - /// <summary> - /// The wheel size - /// </summary> - private const double WheelSize = 3 * LineSize; - - /// <summary> - /// The _ offset - /// </summary> - private Vector _Offset; - /// <summary> - /// The _ extent - /// </summary> - private Size _Extent; - /// <summary> - /// The _ viewport - /// </summary> - private Size _Viewport; - - /// <summary> - /// The _ animation length - /// </summary> - private TimeSpan _AnimationLength = TimeSpan.FromMilliseconds(125); - - /// <summary> - /// When overridden in a derived class, measures the size in layout required for child elements and determines a size for the <see cref="T:System.Windows.FrameworkElement" />-derived class. - /// </summary> - /// <param name="availableSize">The available size that this element can give to child elements. Infinity can be specified as a value to indicate that the element will size to whatever content is available.</param> - /// <returns>The size that this element determines it needs during layout, based on its calculations of child element sizes.</returns> - protected override Size MeasureOverride(Size availableSize) - { - if (Children == null || Children.Count == 0) - { - return availableSize; - } - - var constraint2 = availableSize; - if (CanHorizontallyScroll) - { - constraint2.Width = double.PositiveInfinity; - } - if (CanVerticallyScroll) - { - constraint2.Height = double.PositiveInfinity; - } - - var uiElement = Children[0]; - - uiElement.Measure(constraint2); - var size = uiElement.DesiredSize; - - VerifyScrollData(availableSize, size); - - size.Width = Math.Min(availableSize.Width, size.Width); - size.Height = Math.Min(availableSize.Height, size.Height); - - return size; - } - - /// <summary> - /// Arranges the content of a <see cref="T:System.Windows.Controls.Grid" /> element. - /// </summary> - /// <param name="arrangeSize">Specifies the size this <see cref="T:System.Windows.Controls.Grid" /> element should use to arrange its child elements.</param> - /// <returns><see cref="T:System.Windows.Size" /> that represents the arranged size of this Grid element and its children.</returns> - protected override Size ArrangeOverride(Size arrangeSize) - { - this.VerifyScrollData(arrangeSize, _Extent); - - if (this.Children == null || this.Children.Count == 0) - { - return arrangeSize; - } - - TranslateTransform trans = null; - - var uiElement = Children[0]; - - var finalRect = new Rect(uiElement.DesiredSize); - - // ScrollContentPresenter sets these to 0 - current offset - // We need to set it to zero in order to make the animation work - finalRect.X = 0; - finalRect.Y = 0; - - finalRect.Width = Math.Max(finalRect.Width, arrangeSize.Width); - finalRect.Height = Math.Max(finalRect.Height, arrangeSize.Height); - - trans = uiElement.RenderTransform as TranslateTransform; - - if (trans == null) - { - uiElement.RenderTransformOrigin = new Point(0, 0); - trans = new TranslateTransform(); - uiElement.RenderTransform = trans; - } - - uiElement.Arrange(finalRect); - - trans.BeginAnimation(TranslateTransform.XProperty, - GetAnimation(0 - HorizontalOffset), - HandoffBehavior.Compose); - trans.BeginAnimation(TranslateTransform.YProperty, - GetAnimation(0 - VerticalOffset), - HandoffBehavior.Compose); - - return arrangeSize; - } - - /// <summary> - /// Gets the animation. - /// </summary> - /// <param name="toValue">To value.</param> - /// <returns>DoubleAnimation.</returns> - private DoubleAnimation GetAnimation(double toValue) - { - var animation = new DoubleAnimation(toValue, _AnimationLength); - - animation.EasingFunction = new ExponentialEase { EasingMode = EasingMode.EaseInOut }; - - return animation; - } - - #region Movement Methods - /// <summary> - /// Scrolls down within content by one logical unit. - /// </summary> - public void LineDown() - { SetVerticalOffset(VerticalOffset + LineSize); } - - /// <summary> - /// Scrolls up within content by one logical unit. - /// </summary> - public void LineUp() - { SetVerticalOffset(VerticalOffset - LineSize); } - - /// <summary> - /// Scrolls left within content by one logical unit. - /// </summary> - public void LineLeft() - { SetHorizontalOffset(HorizontalOffset - LineSize); } - - /// <summary> - /// Scrolls right within content by one logical unit. - /// </summary> - public void LineRight() - { SetHorizontalOffset(HorizontalOffset + LineSize); } - - /// <summary> - /// Scrolls down within content after a user clicks the wheel button on a mouse. - /// </summary> - public void MouseWheelDown() - { SetVerticalOffset(VerticalOffset + WheelSize); } - - /// <summary> - /// Scrolls up within content after a user clicks the wheel button on a mouse. - /// </summary> - public void MouseWheelUp() - { SetVerticalOffset(VerticalOffset - WheelSize); } - - /// <summary> - /// Scrolls left within content after a user clicks the wheel button on a mouse. - /// </summary> - public void MouseWheelLeft() - { SetHorizontalOffset(HorizontalOffset - WheelSize); } - - /// <summary> - /// Scrolls right within content after a user clicks the wheel button on a mouse. - /// </summary> - public void MouseWheelRight() - { SetHorizontalOffset(HorizontalOffset + WheelSize); } - - /// <summary> - /// Scrolls down within content by one page. - /// </summary> - public void PageDown() - { SetVerticalOffset(VerticalOffset + ViewportHeight); } - - /// <summary> - /// Scrolls up within content by one page. - /// </summary> - public void PageUp() - { SetVerticalOffset(VerticalOffset - ViewportHeight); } - - /// <summary> - /// Scrolls left within content by one page. - /// </summary> - public void PageLeft() - { SetHorizontalOffset(HorizontalOffset - ViewportWidth); } - - /// <summary> - /// Scrolls right within content by one page. - /// </summary> - public void PageRight() - { SetHorizontalOffset(HorizontalOffset + ViewportWidth); } - #endregion - - /// <summary> - /// Gets or sets a <see cref="T:System.Windows.Controls.ScrollViewer" /> element that controls scrolling behavior. - /// </summary> - /// <value>The scroll owner.</value> - /// <returns>A <see cref="T:System.Windows.Controls.ScrollViewer" /> element that controls scrolling behavior. This property has no default value.</returns> - public ScrollViewer ScrollOwner { get; set; } - - /// <summary> - /// Gets or sets a value that indicates whether scrolling on the horizontal axis is possible. - /// </summary> - /// <value><c>true</c> if this instance can horizontally scroll; otherwise, <c>false</c>.</value> - /// <returns>true if scrolling is possible; otherwise, false. This property has no default value.</returns> - public bool CanHorizontallyScroll { get; set; } - - /// <summary> - /// Gets or sets a value that indicates whether scrolling on the vertical axis is possible. - /// </summary> - /// <value><c>true</c> if this instance can vertically scroll; otherwise, <c>false</c>.</value> - /// <returns>true if scrolling is possible; otherwise, false. This property has no default value.</returns> - public bool CanVerticallyScroll { get; set; } - - /// <summary> - /// Gets the vertical size of the extent. - /// </summary> - /// <value>The height of the extent.</value> - /// <returns>A <see cref="T:System.Double" /> that represents, in device independent pixels, the vertical size of the extent.This property has no default value.</returns> - public double ExtentHeight - { get { return _Extent.Height; } } - - /// <summary> - /// Gets the horizontal size of the extent. - /// </summary> - /// <value>The width of the extent.</value> - /// <returns>A <see cref="T:System.Double" /> that represents, in device independent pixels, the horizontal size of the extent. This property has no default value.</returns> - public double ExtentWidth - { get { return _Extent.Width; } } - - /// <summary> - /// Gets the horizontal offset of the scrolled content. - /// </summary> - /// <value>The horizontal offset.</value> - /// <returns>A <see cref="T:System.Double" /> that represents, in device independent pixels, the horizontal offset. This property has no default value.</returns> - public double HorizontalOffset - { get { return _Offset.X; } } - - /// <summary> - /// Gets the vertical offset of the scrolled content. - /// </summary> - /// <value>The vertical offset.</value> - /// <returns>A <see cref="T:System.Double" /> that represents, in device independent pixels, the vertical offset of the scrolled content. Valid values are between zero and the <see cref="P:System.Windows.Controls.Primitives.IScrollInfo.ExtentHeight" /> minus the <see cref="P:System.Windows.Controls.Primitives.IScrollInfo.ViewportHeight" />. This property has no default value.</returns> - public double VerticalOffset - { get { return _Offset.Y; } } - - /// <summary> - /// Gets the vertical size of the viewport for this content. - /// </summary> - /// <value>The height of the viewport.</value> - /// <returns>A <see cref="T:System.Double" /> that represents, in device independent pixels, the vertical size of the viewport for this content. This property has no default value.</returns> - public double ViewportHeight - { get { return _Viewport.Height; } } - - /// <summary> - /// Gets the horizontal size of the viewport for this content. - /// </summary> - /// <value>The width of the viewport.</value> - /// <returns>A <see cref="T:System.Double" /> that represents, in device independent pixels, the horizontal size of the viewport for this content. This property has no default value.</returns> - public double ViewportWidth - { get { return _Viewport.Width; } } - - /// <summary> - /// Forces content to scroll until the coordinate space of a <see cref="T:System.Windows.Media.Visual" /> object is visible. - /// </summary> - /// <param name="visual">A <see cref="T:System.Windows.Media.Visual" /> that becomes visible.</param> - /// <param name="rectangle">A bounding rectangle that identifies the coordinate space to make visible.</param> - /// <returns>A <see cref="T:System.Windows.Rect" /> that is visible.</returns> - public Rect MakeVisible(Visual visual, Rect rectangle) - { - if (rectangle.IsEmpty || visual == null - || visual == this || !base.IsAncestorOf(visual)) - { return Rect.Empty; } - - rectangle = visual.TransformToAncestor(this).TransformBounds(rectangle); - - //rectangle.Inflate(50, 50); - rectangle.Scale(1.2, 1.2); - - Rect viewRect = new Rect(HorizontalOffset, - VerticalOffset, ViewportWidth, ViewportHeight); - rectangle.X += viewRect.X; - rectangle.Y += viewRect.Y; - - viewRect.X = CalculateNewScrollOffset(viewRect.Left, - viewRect.Right, rectangle.Left, rectangle.Right); - viewRect.Y = CalculateNewScrollOffset(viewRect.Top, - viewRect.Bottom, rectangle.Top, rectangle.Bottom); - SetHorizontalOffset(viewRect.X); - SetVerticalOffset(viewRect.Y); - rectangle.Intersect(viewRect); - rectangle.X -= viewRect.X; - rectangle.Y -= viewRect.Y; - - return rectangle; - } - - /// <summary> - /// Calculates the new scroll offset. - /// </summary> - /// <param name="topView">The top view.</param> - /// <param name="bottomView">The bottom view.</param> - /// <param name="topChild">The top child.</param> - /// <param name="bottomChild">The bottom child.</param> - /// <returns>System.Double.</returns> - private static double CalculateNewScrollOffset(double topView, - double bottomView, double topChild, double bottomChild) - { - bool offBottom = topChild < topView && bottomChild < bottomView; - bool offTop = bottomChild > bottomView && topChild > topView; - bool tooLarge = (bottomChild - topChild) > (bottomView - topView); - - if (!offBottom && !offTop) - { return topView; } //Don't do anything, already in view - - if ((offBottom && !tooLarge) || (offTop && tooLarge)) - { return topChild; } - - return (bottomChild - (bottomView - topView)); - } - - /// <summary> - /// Verifies the scroll data. - /// </summary> - /// <param name="viewport">The viewport.</param> - /// <param name="extent">The extent.</param> - protected void VerifyScrollData(Size viewport, Size extent) - { - if (double.IsInfinity(viewport.Width)) - { viewport.Width = extent.Width; } - - if (double.IsInfinity(viewport.Height)) - { viewport.Height = extent.Height; } - - _Extent = extent; - _Viewport = viewport; - - _Offset.X = Math.Max(0, - Math.Min(_Offset.X, ExtentWidth - ViewportWidth)); - _Offset.Y = Math.Max(0, - Math.Min(_Offset.Y, ExtentHeight - ViewportHeight)); - - if (ScrollOwner != null) - { ScrollOwner.InvalidateScrollInfo(); } - } - - /// <summary> - /// Sets the amount of horizontal offset. - /// </summary> - /// <param name="offset">The degree to which content is horizontally offset from the containing viewport.</param> - public void SetHorizontalOffset(double offset) - { - offset = Math.Max(0, - Math.Min(offset, ExtentWidth - ViewportWidth)); - if (!offset.Equals(_Offset.X)) - { - _Offset.X = offset; - InvalidateArrange(); - } - } - - /// <summary> - /// Sets the amount of vertical offset. - /// </summary> - /// <param name="offset">The degree to which content is vertically offset from the containing viewport.</param> - public void SetVerticalOffset(double offset) - { - offset = Math.Max(0, - Math.Min(offset, ExtentHeight - ViewportHeight)); - if (!offset.Equals(_Offset.Y)) - { - _Offset.Y = offset; - InvalidateArrange(); - } - } - } -} |