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Code Issues Releases Wiki Activity

Use alternative solution to avoid storing last zoom

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This commit is contained in:
Bartłomiej Dach 2020-11-01 21:22:04 +01:00
parent 0ddf840a63
commit 432282e8de
1 changed files with 33 additions and 25 deletions
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58
osu.Game/Screens/Edit/Compose/Components/Timeline/TimelineBlueprintContainer.cs
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@ -9,10 +9,10 @@ using osu.Framework.Graphics.Containers;
using osu.Framework.Graphics.Primitives;
using osu.Framework.Graphics.Shapes;
using osu.Framework.Input.Events;
using osu.Framework.Utils;
using osu.Game.Rulesets.Edit;
using osu.Game.Rulesets.Objects;
using osu.Game.Screens.Edit.Components.Timelines.Summary.Parts;
using osuTK;
using osuTK.Graphics;
namespace osu.Game.Screens.Edit.Compose.Components.Timeline
@ -107,7 +107,7 @@ namespace osu.Game.Screens.Edit.Compose.Components.Timeline
OnDragHandled = handleScrollViaDrag
};
protected override DragBox CreateDragBox(Action<RectangleF> performSelect) => new TimelineDragBox(performSelect, this);
protected override DragBox CreateDragBox(Action<RectangleF> performSelect) => new TimelineDragBox(performSelect);
private void handleScrollViaDrag(DragEvent e)
{
@ -137,17 +137,18 @@ namespace osu.Game.Screens.Edit.Compose.Components.Timeline
private class TimelineDragBox : DragBox
{
private Vector2 lastMouseDown;
// the following values hold the start and end X positions of the drag box in the timeline's local space,
// but with zoom unapplied in order to be able to compensate for positional changes
// while the timeline is being zoomed in/out.
private float? selectionStart;
private float selectionEnd;
private float? lastZoom;
private float localMouseDown;
[Resolved]
private Timeline timeline { get; set; }
private readonly TimelineBlueprintContainer parent;
public TimelineDragBox(Action<RectangleF> performSelect, TimelineBlueprintContainer parent)
public TimelineDragBox(Action<RectangleF> performSelect)
: base(performSelect)
{
this.parent = parent;
}
protected override Drawable CreateBox() => new Box
@ -158,27 +159,34 @@ namespace osu.Game.Screens.Edit.Compose.Components.Timeline
public override bool HandleDrag(MouseButtonEvent e)
{
// store the original position of the mouse down, as we may be scrolled during selection.
if (lastMouseDown != e.ScreenSpaceMouseDownPosition)
{
lastMouseDown = e.ScreenSpaceMouseDownPosition;
localMouseDown = e.MouseDownPosition.X;
lastZoom = null;
}
selectionStart ??= e.MouseDownPosition.X / timeline.CurrentZoom;
//Zooming the timeline shifts the coordinate system. zoomCorrection compensates for that
float zoomCorrection = lastZoom.HasValue ? (parent.timeline.CurrentZoom / lastZoom.Value) : 1;
localMouseDown *= zoomCorrection;
lastZoom = parent.timeline.CurrentZoom;
// only calculate end when a transition is not in progress to avoid bouncing.
if (Precision.AlmostEquals(timeline.CurrentZoom, timeline.Zoom))
selectionEnd = e.MousePosition.X / timeline.CurrentZoom;
float selection1 = localMouseDown;
float selection2 = e.MousePosition.X * zoomCorrection;
updateDragBoxPosition();
return true;
}
Box.X = Math.Min(selection1, selection2);
Box.Width = Math.Abs(selection1 - selection2);
private void updateDragBoxPosition()
{
if (selectionStart == null)
return;
float rescaledStart = selectionStart.Value * timeline.CurrentZoom;
float rescaledEnd = selectionEnd * timeline.CurrentZoom;
Box.X = Math.Min(rescaledStart, rescaledEnd);
Box.Width = Math.Abs(rescaledStart - rescaledEnd);
PerformSelection?.Invoke(Box.ScreenSpaceDrawQuad.AABBFloat);
return true;
}
public override void Hide()
{
base.Hide();
selectionStart = null;
}
}