wehub-resource-sync
106 lines
3.5 KiB
C#
106 lines
3.5 KiB
C#
#nullable enable
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using ImGuiNET;
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using T3.Core.DataTypes.Vector;
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using T3.Core.Utils;
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using T3.Editor.Gui.Styling;
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namespace T3.Editor.Gui.Interaction.Snapping;
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internal sealed class ValueSnapHandler
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{
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public ValueSnapHandler(SnapResult.Orientations orientation)
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{
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_orientation = orientation;
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_snapResult.Orientation = orientation;
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}
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public void AddSnapAttractor(IValueSnapAttractor sp)
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{
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_snapAttractors.Add(sp);
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}
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public void RemoveSnapAttractor(IValueSnapAttractor sp)
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{
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_snapAttractors.Remove(sp);
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}
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/// <summary>
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/// Uses all registered snap providers to test for snapping
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/// </summary>
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public bool TryCheckForSnapping(double targetValue,
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out double snappedValue,
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float canvasScale = 1,
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IEnumerable<IValueSnapAttractor>? ignoredAttractors = null,
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IEnumerable<IValueSnapAttractor>? moreAttractors = null)
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{
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_snapResult.ResetForTargetValue(targetValue, canvasScale);
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_snapResult.Orientation = _orientation;
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foreach (var attractor in _snapAttractors)
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{
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if (ignoredAttractors != null && ignoredAttractors.Contains(attractor))
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continue;
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attractor.CheckForSnap(ref _snapResult);
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}
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if (moreAttractors != null)
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{
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foreach (var attractor in moreAttractors)
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{
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if (ignoredAttractors != null && ignoredAttractors.Contains(attractor))
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continue;
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attractor.CheckForSnap(ref _snapResult);
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}
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}
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if (_snapResult.IsValid)
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{
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_lastSnapTime = ImGui.GetTime();
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_lastSnapValue = _snapResult.BestAnchorValue;
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snappedValue = _snapResult.BestAnchorValue;
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return true;
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}
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snappedValue = double.NaN;
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return false;
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}
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public void DrawSnapIndicator(ScalableCanvas canvas, Color colorOverride= default)
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{
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if (ImGui.GetTime() - _lastSnapTime > SnapIndicatorDuration)
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return;
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var opacity = (1 - ((float)(ImGui.GetTime() - _lastSnapTime) / SnapIndicatorDuration).Clamp(0, 1)) * 0.4f;
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var color = colorOverride == 0 ? UiColors.StatusAnimated : colorOverride;
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color.Rgba.W *= opacity;
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switch (_orientation)
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{
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case SnapResult.Orientations.Vertical:
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{
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var p = new Vector2(0, canvas.TransformY((float)_lastSnapValue));
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p.Y = (int)p.Y - 1;
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//Log.Debug("Drawing " + p);
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ImGui.GetWindowDrawList().AddRectFilled(p, p + new Vector2(4000, 1), color);
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break;
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}
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case SnapResult.Orientations.Horizontal:
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{
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var p = new Vector2(canvas.TransformX((float)_lastSnapValue), 0);
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ImGui.GetWindowDrawList().AddRectFilled(p, p + new Vector2(1, 2000), color);
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break;
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}
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}
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}
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private const float SnapIndicatorDuration = 1;
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private readonly SnapResult.Orientations _orientation;
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private readonly HashSet<IValueSnapAttractor> _snapAttractors = [];
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private double _lastSnapValue;
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private double _lastSnapTime;
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private SnapResult _snapResult = new(0);
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} |