|
|
@@ -0,0 +1,146 @@
|
|
|
+// Copyright (c) The Perspex Project. All rights reserved.
|
|
|
+// Licensed under the MIT license. See licence.md file in the project root for full license information.
|
|
|
+
|
|
|
+using System;
|
|
|
+using Perspex.Controls.Primitives;
|
|
|
+using Perspex.Controls.Templates;
|
|
|
+using Perspex.Input;
|
|
|
+using Perspex.Interactivity;
|
|
|
+
|
|
|
+namespace Perspex.Controls
|
|
|
+{
|
|
|
+ /// <summary>
|
|
|
+ /// A control that lets the user select from a range of values by moving a Thumb control along a Track.
|
|
|
+ /// </summary>
|
|
|
+ public class Slider : RangeBase
|
|
|
+ {
|
|
|
+ /// <summary>
|
|
|
+ /// Defines the <see cref="Orientation"/> property.
|
|
|
+ /// </summary>
|
|
|
+ public static readonly StyledProperty<Orientation> OrientationProperty =
|
|
|
+ PerspexProperty.Register<Slider, Orientation>(nameof(Orientation), Orientation.Horizontal);
|
|
|
+
|
|
|
+ /// <summary>
|
|
|
+ /// Defines the <see cref="IsSnapToTickEnabled"/> property.
|
|
|
+ /// </summary>
|
|
|
+ public static readonly StyledProperty<bool> IsSnapToTickEnabledProperty =
|
|
|
+ PerspexProperty.Register<Slider, bool>(nameof(IsSnapToTickEnabled), false);
|
|
|
+
|
|
|
+ /// <summary>
|
|
|
+ /// Defines the <see cref="TickFrequency"/> property.
|
|
|
+ /// </summary>
|
|
|
+ public static readonly StyledProperty<double> TickFrequencyProperty =
|
|
|
+ PerspexProperty.Register<Slider, double>(nameof(TickFrequencyProperty), 0.0);
|
|
|
+
|
|
|
+ // Slider required parts
|
|
|
+ private Track _track;
|
|
|
+
|
|
|
+ /// <summary>
|
|
|
+ /// Initializes static members of the <see cref="Slider"/> class.
|
|
|
+ /// </summary>
|
|
|
+ static Slider()
|
|
|
+ {
|
|
|
+ Thumb.DragStartedEvent.AddClassHandler<Slider>(x => x.OnThumbDragStarted, RoutingStrategies.Bubble);
|
|
|
+ Thumb.DragDeltaEvent.AddClassHandler<Slider>(x => x.OnThumbDragDelta, RoutingStrategies.Bubble);
|
|
|
+ Thumb.DragCompletedEvent.AddClassHandler<Slider>(x => x.OnThumbDragCompleted, RoutingStrategies.Bubble);
|
|
|
+ }
|
|
|
+
|
|
|
+ /// <summary>
|
|
|
+ /// Instantiates a new instance of the <see cref="Slider"/> class.
|
|
|
+ /// </summary>
|
|
|
+ public Slider()
|
|
|
+ {
|
|
|
+ }
|
|
|
+
|
|
|
+ /// <summary>
|
|
|
+ /// Gets or sets the orientation of a <see cref="Slider"/>.
|
|
|
+ /// </summary>
|
|
|
+ public Orientation Orientation
|
|
|
+ {
|
|
|
+ get { return GetValue(OrientationProperty); }
|
|
|
+ set { SetValue(OrientationProperty, value); }
|
|
|
+ }
|
|
|
+
|
|
|
+ /// <summary>
|
|
|
+ /// Gets or sets a value that indicates whether the <see cref="Slider"/> automatically moves the <see cref="Thumb"/> to the closest tick mark.
|
|
|
+ /// </summary>
|
|
|
+ public bool IsSnapToTickEnabled
|
|
|
+ {
|
|
|
+ get { return GetValue(IsSnapToTickEnabledProperty); }
|
|
|
+ set { SetValue(IsSnapToTickEnabledProperty, value); }
|
|
|
+ }
|
|
|
+
|
|
|
+ /// <summary>
|
|
|
+ /// Gets or sets the interval between tick marks.
|
|
|
+ /// </summary>
|
|
|
+ public double TickFrequency
|
|
|
+ {
|
|
|
+ get { return GetValue(TickFrequencyProperty); }
|
|
|
+ set { SetValue(TickFrequencyProperty, value); }
|
|
|
+ }
|
|
|
+
|
|
|
+ /// <inheritdoc/>
|
|
|
+ protected override void OnTemplateApplied(TemplateAppliedEventArgs e)
|
|
|
+ {
|
|
|
+ _track = e.NameScope.Get<Track>("PART_Track");
|
|
|
+ }
|
|
|
+
|
|
|
+ /// <summary>
|
|
|
+ /// Called when user start dragging the <see cref="Thumb"/>.
|
|
|
+ /// </summary>
|
|
|
+ /// <param name="e"></param>
|
|
|
+ protected virtual void OnThumbDragStarted(VectorEventArgs e)
|
|
|
+ {
|
|
|
+ }
|
|
|
+
|
|
|
+ /// <summary>
|
|
|
+ /// Called when user dragging the <see cref="Thumb"/>.
|
|
|
+ /// </summary>
|
|
|
+ /// <param name="e"></param>
|
|
|
+ protected virtual void OnThumbDragDelta(VectorEventArgs e)
|
|
|
+ {
|
|
|
+ Thumb thumb = e.Source as Thumb;
|
|
|
+ if (thumb != null && _track.Thumb == thumb)
|
|
|
+ {
|
|
|
+ MoveToNextTick(_track.Value);
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ /// <summary>
|
|
|
+ /// Called when user stop dragging the <see cref="Thumb"/>.
|
|
|
+ /// </summary>
|
|
|
+ /// <param name="e"></param>
|
|
|
+ protected virtual void OnThumbDragCompleted(VectorEventArgs e)
|
|
|
+ {
|
|
|
+ }
|
|
|
+
|
|
|
+ /// <summary>
|
|
|
+ /// Searches for the closest tick and sets Value to that tick.
|
|
|
+ /// </summary>
|
|
|
+ /// <param name="value">Value that want to snap to closest Tick.</param>
|
|
|
+ private void MoveToNextTick(double value)
|
|
|
+ {
|
|
|
+ double next = SnapToTick(Math.Max(Minimum, Math.Min(Maximum, value)));
|
|
|
+ if (next != value)
|
|
|
+ {
|
|
|
+ Value = next;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ /// <summary>
|
|
|
+ /// Snap the input 'value' to the closest tick.
|
|
|
+ /// </summary>
|
|
|
+ /// <param name="value">Value that want to snap to closest Tick.</param>
|
|
|
+ private double SnapToTick(double value)
|
|
|
+ {
|
|
|
+ if (IsSnapToTickEnabled && TickFrequency > 0.0)
|
|
|
+ {
|
|
|
+ double previous = Minimum + (Math.Round(((value - Minimum) / TickFrequency)) * TickFrequency);
|
|
|
+ double next = Math.Min(Maximum, previous + TickFrequency);
|
|
|
+ value = value > (previous + next) * 0.5 ? next : previous;
|
|
|
+ }
|
|
|
+
|
|
|
+ return value;
|
|
|
+ }
|
|
|
+ }
|
|
|
+}
|
Artsiom Herasimchuk