// Sticks to bottom of rect, and can slide horizontally only.
public static void DrawHorizontalKeyMarker(
Rect fullSliderRect, BaseKeyframe keyFrame, UnityEngine.Object undoObject, out bool didSingleClick, out bool isDragging, out bool keyFrameTimeChanged)
{
Rect markerRect = new Rect(
SkyEditorUtility.GetXPositionForPercent(fullSliderRect, keyFrame.time) - (KEY_GRIP_WIDTH / 2),
fullSliderRect.y + fullSliderRect.height - (KEY_GRIP_HEIGHT) / 2.0f,
KEY_GRIP_WIDTH,
KEY_GRIP_HEIGHT);
bool wasDragging = TimelineSelection.selectedControlUUID != null && TimelineSelection.selectedControlUUID == keyFrame.id;
bool isMouseOverControl = markerRect.Contains(Event.current.mousePosition);
didSingleClick = false;
isDragging = wasDragging;
keyFrameTimeChanged = false;
// Single Click.
if (Event.current.isMouse)
{
// Check for single click, with no drag.
if (Event.current.type == EventType.MouseUp && TimelineSelection.selectedControlUUID == null && isMouseOverControl)
{
Event.current.Use();
didSingleClick = true;
}
// Start slide.
if (TimelineSelection.selectedControlUUID == null && isMouseOverControl && Event.current.type == EventType.MouseDrag)
{
TimelineSelection.selectedControlUUID = keyFrame.id;
Event.current.Use();
isDragging = true;
}
// End Slide.
if (wasDragging && Event.current.type == EventType.MouseUp)
{
TimelineSelection.selectedControlUUID = null;
Event.current.Use();
isDragging = false;
}
// If we're dragging this keyframe grip, move it's position.
if (isDragging || wasDragging)
{
// Update key frame time value and reposition rectangle.
Undo.RecordObject(undoObject, "Keyframe time position changed.");
keyFrame.time = SkyEditorUtility.GetPercentForXPosition(fullSliderRect, Event.current.mousePosition.x);
keyFrameTimeChanged = true;
isDragging = true;
// Position the marker rect.
markerRect.x = SkyEditorUtility.GetXPositionForPercent(fullSliderRect, keyFrame.time) - (KEY_GRIP_WIDTH / 2);
Event.current.Use();
}
}
bool showAsActive = IsKeyframeActiveInInspector(keyFrame) || isDragging;
// Draw the marker at this location.
SkyEditorUtility.DrawKeyMarker(markerRect, showAsActive);
}