protected override void RenderEvent(FrameRange viewRange, FrameRange validKeyframeRange) { int startOffsetHandleId = EditorGUIUtility.GetControlID(FocusType.Passive); switch (Event.current.type) { case EventType.MouseDown: if (Event.current.alt && EditorGUIUtility.hotControl == 0 && _eventRect.Contains(Event.current.mousePosition)) { EditorGUIUtility.hotControl = startOffsetHandleId; _frameMouseDown = SequenceEditor.GetFrameForX(Event.current.mousePosition.x) - _playAudioEvt.Start; Event.current.Use(); } break; case EventType.MouseDrag: if (EditorGUIUtility.hotControl == startOffsetHandleId) { int mouseCurrentFrame = Mathf.Clamp(SequenceEditor.GetFrameForX(Event.current.mousePosition.x) - _playAudioEvt.Start, 0, _playAudioEvt.Length); int mouseDelta = _frameMouseDown - mouseCurrentFrame; if (mouseDelta != 0) { _frameMouseDown = mouseCurrentFrame; _startOffset.serializedObject.Update(); _startOffset.intValue = Mathf.Clamp(_startOffset.intValue + mouseDelta, 0, _playAudioEvt.GetMaxStartOffset()); _startOffset.serializedObject.ApplyModifiedProperties(); } Event.current.Use(); } break; case EventType.MouseUp: if (EditorGUIUtility.hotControl == startOffsetHandleId) { EditorGUIUtility.hotControl = 0; Event.current.Use(); } break; } int frameRangeLength = _playAudioEvt.Length; base.RenderEvent(viewRange, validKeyframeRange); if (frameRangeLength != _playAudioEvt.Length) { _startOffset.serializedObject.Update(); _startOffset.intValue = Mathf.Clamp(_startOffset.intValue, 0, _playAudioEvt.GetMaxStartOffset()); _startOffset.serializedObject.ApplyModifiedProperties(); } if (_currentClip != _playAudioEvt.AudioClip) { _waveformTexture = FUtility.GetAudioClipTexture(_playAudioEvt.AudioClip, _rect.width, 64); _currentClip = _playAudioEvt.AudioClip; } if (Event.current.type == EventType.Repaint && _waveformTexture != null) { float border = 2; Rect waveformRect = _eventRect; waveformRect.xMin += border; waveformRect.xMax -= border; FrameRange visibleEvtRange = _playAudioEvt.FrameRange; float startOffset = _playAudioEvt.StartOffset; if (viewRange.Start > visibleEvtRange.Start) { startOffset += viewRange.Start - visibleEvtRange.Start; visibleEvtRange.Start = viewRange.Start; } if (viewRange.End < visibleEvtRange.End) { visibleEvtRange.End = viewRange.End; } float uvLength = (visibleEvtRange.Length * _playAudioEvt.Sequence.InverseFrameRate) / _playAudioEvt.AudioClip.length; Rect waveformUVRect = new Rect((startOffset / _playAudioEvt.FrameRange.Length) * ((_playAudioEvt.FrameRange.Length * _playAudioEvt.Sequence.InverseFrameRate) / _playAudioEvt.AudioClip.length), 0, uvLength, 1f); float uvPerPixel = uvLength / waveformRect.width; float borderUVs = border * uvPerPixel; waveformUVRect.xMin += borderUVs; waveformUVRect.xMax -= borderUVs; if (_currentClip.channels == 1) { waveformUVRect.yMin = 0.3f; waveformUVRect.yMax = 0.7f; } GUI.DrawTextureWithTexCoords(waveformRect, _waveformTexture, waveformUVRect); } }