/// <summary>
/// Creates a ScrollBar HUD element with the specified parameters.
/// </summary>
public ScrollBar(Game game, UIController controller, Vector2? position, float length,
ListBoxStateMachine listBox,
ScrollBarStateMachine scrollBar, UIElement parent)
: base(game, controller, null, position,
scrollBar.NumberOfPixelsInHorizontalAxis,
scrollBar.NumberOfPixelsInVerticalAxis,
parent)
{
if (scrollBar.Orientation != Orientation.Horizontal)
{
throw new InvalidOperationException(Properties.Resources.ScrollBarStateMachineShouldBeHorizontal);
}
this.listBox = listBox;
StateMachine = scrollBar;
StateMachine.Tag = this;
StateMachine.MaximumFlickVelocity = MaximumFlickVelocity;
scrollBarLength = length;
}
/// <summary>
/// Creates a new ScrollViewerStateMachine.
/// </summary>
/// <param name="controller">The UIController which dispatches hit testing.</param>
/// <param name="elementToScroll">The element which is scrolling.</param>
public ScrollAdapter(UIController controller, UIElementStateMachine elementToScroll)
{
// By default scrolling should be allowed in both directions.
Orientation = Orientation.Both;
this.elementToScroll = elementToScroll;
// Handle the ScrollBars for this ScrollViewer.
horizontalScrollBarStateMachine =
new ScrollBarStateMachine(controller, elementToScroll.NumberOfPixelsInHorizontalAxis, 0);
horizontalScrollBarStateMachine.Orientation = Orientation.Horizontal;
verticalScrollBarStateMachine =
new ScrollBarStateMachine(controller, 0, elementToScroll.NumberOfPixelsInVerticalAxis);
verticalScrollBarStateMachine.Orientation = Orientation.Vertical;
// Default to 1 (full size).
HorizontalViewportSize = 1;
VerticalViewportSize = 1;
horizontalScrollBarStateMachine.ValueChanged += OnHorizontalScrollBarStateMachineValueChanged;
horizontalScrollBarStateMachine.ThumbChanged += OnHorizontalScrollBarStateMachineThumbChanged;
horizontalScrollBarStateMachine.NumberOfPixelsInHorizontalAxisChanged +=
HorizontalScrollBarStateMachineNumberOfPixelsInHorizontalAxisChanged;
verticalScrollBarStateMachine.ValueChanged += OnVerticalScrollBarStateMachineValueChanged;
verticalScrollBarStateMachine.ThumbChanged += OnVerticalScrollBarStateMachineThumbChanged;
verticalScrollBarStateMachine.NumberOfPixelsInVerticalAxisChanged +=
VerticalScrollBarStateMachineNumberOfPixelsInVerticalAxisChanged;
// Manipulations should only cause translations, not rotations or scaling.
manipulationProcessor =
new ManipulationProcessor2D(Manipulations2D.TranslateX | Manipulations2D.TranslateY);
manipulationProcessor.Completed += OnAffine2DManipulationCompleted;
stopwatch = Stopwatch.StartNew();
}
/// <summary>
/// Creates a ScrollBar HUD element with the specified parent UIElement.
/// </summary>
public ScrollBar(UIElement parent, Vector2? position, float length,
ListBoxStateMachine listBox, ScrollBarStateMachine scrollBar)
: this(parent.Game, parent.Controller, position, length, listBox, scrollBar, parent)
{
// Empty.
}