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Wojtek Figat
240
Source/Editor/GUI/Timeline/GUI/Background.cs
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240
Source/Editor/GUI/Timeline/GUI/Background.cs
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// Copyright (c) 2012-2020 Wojciech Figat. All rights reserved.
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using System;
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using System.Globalization;
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using FlaxEngine;
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using FlaxEngine.GUI;
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namespace FlaxEditor.GUI.Timeline.GUI
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{
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/// <summary>
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/// The timeline background control.
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/// </summary>
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/// <seealso cref="FlaxEngine.GUI.ContainerControl" />
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public class Background : ContainerControl
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{
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private readonly Timeline _timeline;
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private float[] _tickSteps;
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private float[] _tickStrengths;
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/// <summary>
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/// Initializes a new instance of the <see cref="Background"/> class.
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/// </summary>
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/// <param name="timeline">The timeline.</param>
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public Background(Timeline timeline)
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{
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_timeline = timeline;
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_tickSteps = Utilities.Utils.CurveTickSteps;
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_tickStrengths = new float[_tickSteps.Length];
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}
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/// <inheritdoc />
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public override bool IntersectsContent(ref Vector2 locationParent, out Vector2 location)
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{
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// Pass all events
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location = PointFromParent(ref locationParent);
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return true;
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}
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/// <inheritdoc />
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public override void Draw()
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{
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var style = Style.Current;
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var mediaBackground = _timeline.MediaBackground;
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var tracks = _timeline.Tracks;
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var linesColor = style.BackgroundNormal;
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var areaLeft = -X;
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var areaRight = Parent.Width + mediaBackground.ControlsBounds.BottomRight.X;
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var height = Height;
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var leftSideMin = PointFromParent(Vector2.Zero);
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var leftSideMax = BottomLeft;
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var rightSideMin = UpperRight;
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var rightSideMax = PointFromParent(Parent.BottomRight) + mediaBackground.ControlsBounds.BottomRight;
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// Draw lines between tracks
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Render2D.DrawLine(new Vector2(areaLeft, 0.5f), new Vector2(areaRight, 0.5f), linesColor);
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for (int i = 0; i < tracks.Count; i++)
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{
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var track = tracks[i];
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if (track.Visible)
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{
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var top = track.Bottom + 0.5f;
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Render2D.DrawLine(new Vector2(areaLeft, top), new Vector2(areaRight, top), linesColor);
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}
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}
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// Highlight selected tracks
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for (int i = 0; i < tracks.Count; i++)
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{
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var track = tracks[i];
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if (track.Visible && _timeline.SelectedTracks.Contains(track) && _timeline.ContainsFocus)
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{
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Render2D.FillRectangle(new Rectangle(areaLeft, track.Top, areaRight, track.Height), style.BackgroundSelected);
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}
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}
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// Setup time axis ticks
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int minDistanceBetweenTicks = 4000;
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int maxDistanceBetweenTicks = 6000;
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var zoom = Timeline.UnitsPerSecond * _timeline.Zoom;
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var left = Vector2.Min(leftSideMin, rightSideMax).X;
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var right = Vector2.Max(leftSideMin, rightSideMax).X;
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var pixelRange = (right - left) * zoom;
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var leftFrame = Mathf.Floor((left - Timeline.StartOffset) / zoom) * _timeline.FramesPerSecond;
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var rightFrame = Mathf.Ceil((right - Timeline.StartOffset) / zoom) * _timeline.FramesPerSecond;
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var min = leftFrame;
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var max = rightFrame;
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var range = max - min;
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int smallestTick = 0;
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int biggestTick = _tickSteps.Length - 1;
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for (int i = _tickSteps.Length - 1; i >= 0; i--)
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{
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// Calculate how far apart these modulo tick steps are spaced
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float tickSpacing = _tickSteps[i] * pixelRange / range;
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// Calculate the strength of the tick markers based on the spacing
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_tickStrengths[i] = Mathf.Saturate((tickSpacing - minDistanceBetweenTicks) / (maxDistanceBetweenTicks - minDistanceBetweenTicks));
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// Beyond threshold the ticks don't get any bigger or fatter
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if (_tickStrengths[i] >= 1)
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biggestTick = i;
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// Do not show small tick markers
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if (tickSpacing <= minDistanceBetweenTicks)
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{
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smallestTick = i;
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break;
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}
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}
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int tickLevels = biggestTick - smallestTick + 1;
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// Draw vertical lines for time axis
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for (int level = 0; level < tickLevels; level++)
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{
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float strength = _tickStrengths[smallestTick + level];
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if (strength <= Mathf.Epsilon)
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continue;
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// Draw all ticks
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int l = Mathf.Clamp(smallestTick + level, 0, _tickSteps.Length - 1);
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int startTick = Mathf.FloorToInt(min / _tickSteps[l]);
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int endTick = Mathf.CeilToInt(max / _tickSteps[l]);
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Color lineColor = style.ForegroundDisabled.RGBMultiplied(0.7f).AlphaMultiplied(strength);
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for (int i = startTick; i <= endTick; i++)
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{
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if (l < biggestTick && (i % Mathf.RoundToInt(_tickSteps[l + 1] / _tickSteps[l]) == 0))
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continue;
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var tick = i * _tickSteps[l];
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var time = tick / _timeline.FramesPerSecond;
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var x = time * zoom + Timeline.StartOffset;
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// Draw line
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Render2D.FillRectangle(new Rectangle(x - 0.5f, 0, 1.0f, height), lineColor);
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}
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}
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DrawChildren();
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// Disabled overlay
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for (int i = 0; i < tracks.Count; i++)
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{
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var track = tracks[i];
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if (track.DrawDisabled && track.IsExpandedAll)
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{
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Render2D.FillRectangle(new Rectangle(areaLeft, track.Top, areaRight, track.Height), new Color(0, 0, 0, 100));
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}
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}
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// Darken area outside the duration
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var outsideDurationAreaColor = new Color(0, 0, 0, 100);
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Render2D.FillRectangle(new Rectangle(leftSideMin, leftSideMax.X - leftSideMin.X, height), outsideDurationAreaColor);
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Render2D.FillRectangle(new Rectangle(rightSideMin, rightSideMax.X - rightSideMin.X, height), outsideDurationAreaColor);
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// Draw time axis header
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var timeAxisHeaderOffset = -_timeline.MediaBackground.ViewOffset.Y;
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var verticalLinesHeaderExtend = Timeline.HeaderTopAreaHeight * 0.5f;
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var timeShowMode = _timeline.TimeShowMode;
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Render2D.FillRectangle(new Rectangle(areaLeft, timeAxisHeaderOffset - Timeline.HeaderTopAreaHeight, areaRight - areaLeft, Timeline.HeaderTopAreaHeight), style.Background.RGBMultiplied(0.7f));
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for (int level = 0; level < tickLevels; level++)
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{
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float strength = _tickStrengths[smallestTick + level];
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if (strength <= Mathf.Epsilon)
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continue;
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// Draw all ticks
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int l = Mathf.Clamp(smallestTick + level, 0, _tickSteps.Length - 1);
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int startTick = Mathf.FloorToInt(min / _tickSteps[l]);
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int endTick = Mathf.CeilToInt(max / _tickSteps[l]);
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Color lineColor = style.Foreground.RGBMultiplied(0.8f).AlphaMultiplied(strength);
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Color labelColor = style.ForegroundDisabled.AlphaMultiplied(strength);
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for (int i = startTick; i <= endTick; i++)
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{
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if (l < biggestTick && (i % Mathf.RoundToInt(_tickSteps[l + 1] / _tickSteps[l]) == 0))
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continue;
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var tick = i * _tickSteps[l];
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var time = tick / _timeline.FramesPerSecond;
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var x = time * zoom + Timeline.StartOffset;
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// Header line
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var lineRect = new Rectangle(x - 0.5f, -verticalLinesHeaderExtend + timeAxisHeaderOffset, 1.0f, verticalLinesHeaderExtend);
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Render2D.FillRectangle(lineRect, lineColor);
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// Time label
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string labelText;
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switch (timeShowMode)
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{
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case Timeline.TimeShowModes.Frames:
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labelText = tick.ToString("0000");
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break;
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case Timeline.TimeShowModes.Seconds:
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labelText = time.ToString("###0.##'s'", CultureInfo.InvariantCulture);
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break;
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case Timeline.TimeShowModes.Time:
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labelText = TimeSpan.FromSeconds(time).ToString("g");
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break;
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default: throw new ArgumentOutOfRangeException();
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}
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var labelRect = new Rectangle(x + 2, -verticalLinesHeaderExtend + timeAxisHeaderOffset, 50, verticalLinesHeaderExtend);
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Render2D.DrawText(
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style.FontSmall,
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labelText,
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labelRect,
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labelColor,
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TextAlignment.Near,
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TextAlignment.Center,
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TextWrapping.NoWrap,
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1.0f,
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0.8f
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);
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}
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}
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}
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/// <inheritdoc />
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public override bool OnMouseWheel(Vector2 location, float delta)
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{
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if (base.OnMouseWheel(location, delta))
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return true;
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// Zoom in/out
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if (IsMouseOver && Root.GetKey(KeyboardKeys.Control))
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{
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// TODO: preserve the view center point for easier zooming
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_timeline.Zoom += delta * 0.1f;
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return true;
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}
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return false;
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}
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/// <inheritdoc />
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public override void OnDestroy()
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{
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// Cleanup
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_tickSteps = null;
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_tickStrengths = null;
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base.OnDestroy();
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}
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}
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}
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