private void owner_Paint(object sender, PaintEventArgs e)
{
// Test if anything is visible.
m_visibleManipulator =
TimelineControl.CalculateRange(Owner.EditableSelection, out m_worldMin, out m_worldMax);
if (!m_visibleManipulator)
{
return;
}
Graphics g = e.Graphics;
Matrix worldToView = Owner.Transform;
// Make the TimelineRenderer draw the ghosts, if necessary. Must happen before
// the manipulator is drawn so that snap-to info is created.
if (IsScaling)
{
TimelineLayout layout = Owner.GetLayout();
GhostInfo[] ghosts = m_resizer.CreateGhostInfo(
layout,
Owner.GetDragOffset().X,
worldToView);
Owner.Renderer.DrawGhosts(
ghosts,
DraggedSide,
worldToView,
Owner.ClientRectangle,
g);
}
// Tighten clipping region. Has to occur after DrawGhosts because the TimelineRenderer
// assumes that it has to shrink the current Graphics.Clip region by the header width.
Region originalClip = g.Clip;
Rectangle clipRectangle = Owner.VisibleClientRectangle;
g.Clip = new Region(clipRectangle);
// Draw the manipulator, giving client code a customization point.
DrawManipulator(g, out m_leftHandle, out m_rightHandle);
// Restore clipping region.
g.Clip = originalClip;
}
// get track that contains y value
private TimelinePath GetTargetTrack(
float y,
TimelineLayout layout,
IList <ITrack> tracks)
{
TimelinePath testPath = new TimelinePath((ITimelineObject)null);
foreach (ITrack track in tracks)
{
testPath.Last = track;
RectangleF targetBounds = layout[testPath];
if (targetBounds.Top <= y && targetBounds.Bottom >= y)
{
return(testPath);
}
}
return(null);
}
// gets objects of appropriate type that are underneath the moving selected objects
private TimelinePath[] GetMoveTargets(TimelineLayout layout)
{
// get groups and visible tracks
List <IGroup> groups = new List <IGroup>();
List <ITrack> visibleTracks = new List <ITrack>();
foreach (IGroup group in m_owner.TimelineDocument.Timeline.Groups)
{
groups.Add(group);
IList <ITrack> tracks = group.Tracks;
bool expanded = group.Expanded;
bool collapsible = tracks.Count > 1;
bool collapsed = collapsible && !expanded;
if (!collapsed)
{
foreach (ITrack track in tracks)
{
visibleTracks.Add(track);
}
}
}
TimelinePath[] targets = new TimelinePath[m_owner.Selection.SelectionCount];
RectangleF bounds;
TimelinePath testPath = new TimelinePath((ITimelineObject)null);
int i = -1;
foreach (TimelinePath path in m_owner.Selection.Selection)
{
i++;
IGroup group = path.Last as IGroup;
if (group != null)
{
foreach (IGroup targetGroup in groups)
{
Point p = m_owner.DragPoint;
testPath.Last = targetGroup;
RectangleF targetBounds = layout[testPath];
if (targetBounds.Top <= p.Y && targetBounds.Bottom >= p.Y)
{
targets[i] = new TimelinePath(testPath);
break;
}
}
continue;
}
ITrack track = path.Last as ITrack;
if (track != null)
{
foreach (ITrack targetTrack in visibleTracks)
{
Point p = m_owner.DragPoint;
testPath.Last = targetTrack;
RectangleF targetBounds = layout[testPath];
if (targetBounds.Top <= p.Y && targetBounds.Bottom >= p.Y)
{
targets[i] = new TimelinePath(testPath);
break;
}
}
continue;
}
IInterval interval = path.Last as IInterval;
if (interval != null)
{
track = interval.Track;
if (track != null)
{
testPath.Last = track;
bounds = layout[testPath];
float y = bounds.Top + bounds.Height * 0.5f + m_owner.DragDelta.Y;
targets[i] = GetTargetTrack(y, layout, visibleTracks);
continue;
}
}
IKey key = path.Last as IKey;
if (key != null)
{
track = key.Track;
if (track != null)
{
testPath.Last = track;
bounds = layout[testPath];
float y = bounds.Top + bounds.Height * 0.5f + m_owner.DragDelta.Y;
targets[i] = GetTargetTrack(y, layout, visibleTracks);
continue;
}
}
// ignore Markers, as they don't hit targets
}
return(targets);
}
// gets move information, for drawing ghosts and for performing actual move operation
private GhostInfo[] GetMoveGhostInfo(Matrix worldToView, TimelineLayout layout)
{
// get start and y offsets in timeline space
PointF dragOffset = m_owner.GetDragOffset();
// Get snapping points along the timeline (in world coordinates).
List <float> movingPoints = new List <float>(2);
TimelinePath snapperPath;
if (m_mouseMoveHitRecord != null)
{
snapperPath = m_mouseMoveHitRecord.HitPath;//use the last clicked event (interval, key or marker)
}
else
{
snapperPath = m_owner.Selection.LastSelected as TimelinePath;//moving a group or track, for example
}
IEvent snapperEvent = snapperPath != null ? snapperPath.Last as IEvent : null;
if (snapperEvent != null)
{
Matrix localToWorld = TimelineControl.CalculateLocalToWorld(snapperPath);
float worldStart = GdiUtil.Transform(localToWorld, snapperEvent.Start + dragOffset.X);
movingPoints.Add(worldStart);
if (snapperEvent.Length > 0.0f)
{
movingPoints.Add(GdiUtil.Transform(localToWorld, snapperEvent.Start + dragOffset.X + snapperEvent.Length));
}
}
// Get the offset from one of the world snap points to the closest non-selected object.
float snapOffset;
try
{
s_snapOptions.FilterContext = snapperEvent;
s_snapOptions.Filter = new TimelineControl.SnapFilter(MoveSnapFilter);
snapOffset = m_owner.GetSnapOffset(movingPoints, s_snapOptions);
}
finally
{
s_snapOptions.FilterContext = null;
s_snapOptions.Filter = null;
}
// adjust dragOffset to "snap-to" nearest event
dragOffset.X += snapOffset;
// get offsets in client space
float xOffset = dragOffset.X * worldToView.Elements[0];
float yOffset = dragOffset.Y * worldToView.Elements[3];
TimelinePath[] targets = GetMoveTargets(layout);
GhostInfo[] ghosts = new GhostInfo[targets.Length];
int i = -1;
foreach (TimelinePath path in m_owner.Selection.Selection)
{
i++;
ITimelineObject timelineObject = path.Last;
RectangleF bounds = layout[path];
TimelinePath targetPath = targets[i];
ITimelineObject target = targetPath != null ? targetPath.Last : null;
float start = 0;
float length = 0;
bool valid = true;
IInterval interval = timelineObject as IInterval;
IKey key = timelineObject as IKey;
IMarker marker = timelineObject as IMarker;
ITrack track = timelineObject as ITrack;
IGroup group = timelineObject as IGroup;
ITimelineReference reference = timelineObject as ITimelineReference;
if (interval != null)
{
ITrack targetTrack = target as ITrack;
start = interval.Start + dragOffset.X;
length = interval.Length;
valid =
targetTrack != null &&
m_owner.Constraints.IsStartValid(interval, ref start) &&
m_owner.Constraints.IsLengthValid(interval, ref length);
if (valid)
{
yOffset = layout[target].Y - layout[interval.Track].Y;
TimelinePath testPath = new TimelinePath(targetPath);
foreach (IInterval other in targetTrack.Intervals)
{
// skip selected intervals, since they are moving too
testPath.Last = other;
if (m_owner.Selection.SelectionContains(testPath))
{
continue;
}
if (!m_owner.Constraints.IsIntervalValid(interval, ref start, ref length, other))
{
valid = false;
break;
}
}
}
}
else if (reference != null)
{
// don't allow for vertical repositioning yet
start = reference.Start + dragOffset.X;
valid = true;
}
else if (key != null)
{
start = key.Start + dragOffset.X;
ITrack targetTrack = target as ITrack;
valid =
targetTrack != null &&
m_owner.Constraints.IsStartValid(key, ref start);
if (valid)
{
yOffset = layout[targetTrack].Y - layout[key.Track].Y;
}
}
else if (marker != null)
{
start = marker.Start + dragOffset.X;
yOffset = 0;
valid = m_owner.Constraints.IsStartValid(marker, ref start);
}
else if (track != null)
{
xOffset = 0;
if (target == null)
{
target =
(m_owner.DragDelta.Y < 0) ? GetLastTrack() : GetFirstTrack();
}
}
else if (group != null)
{
xOffset = 0;
if (target == null)
{
IList <IGroup> groups = m_owner.TimelineDocument.Timeline.Groups;
target = (m_owner.DragDelta.Y < 0) ? groups[0] : groups[groups.Count - 1];
}
}
bounds.Offset(xOffset, yOffset);
ghosts[i] = new GhostInfo(timelineObject, target, start, length, bounds, valid);
}
return(ghosts);
}
/// <summary>
/// Creates and caches resize information, for drawing ghosts and for performing
/// actual resize operations</summary>
/// <param name="layout">TimelineLayout</param>
/// <param name="worldDrag">Drag offset</param>
/// <param name="worldToView">World to view transformation matrix</param>
/// <returns>Array of GhostInfo</returns>
internal GhostInfo[] CreateGhostInfo(TimelineLayout layout, float worldDrag, Matrix worldToView)
{
// Get snap-from point in world coordinates.
float[] movingPoints = new[] { worldDrag + m_originalBoundary };
float snapOffset = m_owner.GetSnapOffset(movingPoints, null);
// adjust dragOffset to snap-to nearest event
worldDrag += snapOffset;
DragOffsetWithSnap = worldDrag;
GhostInfo[] ghosts = new GhostInfo[m_selection.Count];
IEnumerator <TimelinePath> events = m_selection.GetEnumerator();
m_worldGhostMin = float.MaxValue;
m_worldGhostMax = float.MinValue;
for (int i = 0; i < ghosts.Length; i++)
{
events.MoveNext();
IEvent curr = (IEvent)events.Current.Last;
RectangleF bounds = layout[events.Current];
float viewStart = bounds.Left;
float viewEnd = viewStart + bounds.Width;
float worldStart = curr.Start;
float worldEnd = worldStart + curr.Length;
Resize(
worldDrag,
worldToView,
ref viewStart, ref viewEnd,
ref worldStart, ref worldEnd);
float worldLength = worldEnd - worldStart;
bounds = new RectangleF(viewStart, bounds.Y, viewEnd - viewStart, bounds.Height);
if (m_worldGhostMin > worldStart)
{
m_worldGhostMin = worldStart;
}
if (m_worldGhostMax < worldEnd)
{
m_worldGhostMax = worldEnd;
}
bool valid = true;
IInterval interval = curr as IInterval;
if (interval != null)
{
TimelinePath testPath = new TimelinePath(events.Current);
foreach (IInterval other in interval.Track.Intervals)
{
// Skip this interval if it's part of the selection because we have to assume
// that the track began in a valid state and that all of the selected objects
// will still be valid relative to each other. We only need to check that the
// scaled objects are valid relative to the stationary objects.
testPath.Last = other;
if (Mode == ScaleMode.TimePeriod &&
m_selection.Contains(testPath))
{
continue;
}
else if (other == interval)
{
continue;
}
if (!m_owner.Constraints.IsIntervalValid(interval, ref worldStart, ref worldLength, other))
{
valid = false;
break;
}
}
}
ghosts[i] = new GhostInfo(curr, null, worldStart, worldLength, bounds, valid);
}
m_ghosts = ghosts;
return(ghosts);
}
