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MLEM/MLEM.Ui/Elements/Slider.cs
2020-06-18 17:24:35 +02:00

42 lines
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1.7 KiB
C#

using Microsoft.Xna.Framework;
using MLEM.Misc;
namespace MLEM.Ui.Elements {
/// <summary>
/// A slider element for use inside of a <see cref="UiSystem"/>.
/// A slider is a horizontal <see cref="ScrollBar"/> whose value can additionally be controlled using the <see cref="UiControls.LeftButtons"/> and <see cref="UiControls.RightButtons"/>.
/// </summary>
public class Slider : ScrollBar {
/// <summary>
/// Creates a new slider with the given settings
/// </summary>
/// <param name="anchor">The slider's anchor</param>
/// <param name="size">The slider's size</param>
/// <param name="scrollerSize">The size of the slider's scroller indicator</param>
/// <param name="maxValue">The slider's maximum value</param>
public Slider(Anchor anchor, Vector2 size, int scrollerSize, float maxValue) :
base(anchor, size, scrollerSize, maxValue, true) {
this.CanBeSelected = true;
this.GetGamepadNextElement = (dir, next) => {
if (dir == Direction2.Left || dir == Direction2.Right)
return null;
return next;
};
}
/// <inheritdoc />
public override void Update(GameTime time) {
base.Update(time);
if (this.IsSelected) {
if (this.Controls.LeftButtons.IsPressed(this.Input, this.Controls.GamepadIndex)) {
this.CurrentValue -= this.StepPerScroll;
} else if (this.Controls.RightButtons.IsPressed(this.Input, this.Controls.GamepadIndex)) {
this.CurrentValue += this.StepPerScroll;
}
}
}
}
}