private TimeSpan PixelsToTimespan(double pixelCount, TimelineScroller rootWindow)
{
double percent = pixelCount / rootWindow.ActualWidth;
var viewRange = this.Navigator.ViewRange;
return(TimeSpan.FromTicks((long)((double)viewRange.Duration.Ticks * percent)));
}
private DateTime GetTimeAtMousePointer(MouseEventArgs e)
{
TimelineScroller root = this.FindTimelineScroller(e.Source);
if (root != null)
{
Point point = e.GetPosition(root);
double percent = point.X / root.ActualWidth;
var viewRange = this.Navigator.ViewRange;
DateTime time = viewRange.StartTime + TimeSpan.FromTicks((long)((double)viewRange.Duration.Ticks * percent));
// If we're currently snapping to some Visualization Object, adjust the time to the timestamp of the nearest message
DateTime?snappedTime = null;
PlotVisualizationObject snapToVisualizationObject = this.Container.SnapToVisualizationObject as PlotVisualizationObject;
if (snapToVisualizationObject != null)
{
snappedTime = snapToVisualizationObject.GetTimeOfNearestMessage(time, snapToVisualizationObject.SummaryData?.Count ?? 0, (idx) => snapToVisualizationObject.SummaryData[idx].OriginatingTime);
}
return(snappedTime ?? time);
}
Console.WriteLine("TimelineVisualizationPanel.GetTimeAtMousePointer() - Could not find the TimelineScroller in the tree");
return(DateTime.UtcNow);
}
private void DragAnnotationEdge(MouseEventArgs e)
{
// Get the timeline scroller
TimelineScroller timelineScroller = this.FindTimelineScroller(e.Source);
// Get the time at the mouse cursor
DateTime cursorTime = this.GetTimeAtMousePointer(e.GetPosition(e.Source as IInputElement), timelineScroller, true);
// Make sure we stay within bounds
if (cursorTime < this.annotationDragInfo.MinimumTime)
{
cursorTime = this.annotationDragInfo.MinimumTime;
}
if (cursorTime > this.annotationDragInfo.MaximumTime)
{
cursorTime = this.annotationDragInfo.MaximumTime;
}
// Set the new positions of the ends of the annotation(s)
if (this.annotationDragInfo.LeftAnnotation != null)
{
this.annotationDragInfo.LeftAnnotation.Interval = new TimeInterval(this.annotationDragInfo.LeftAnnotation.Interval.Left, cursorTime);
}
if (this.annotationDragInfo.RightAnnotation != null)
{
this.annotationDragInfo.RightAnnotation.Interval = new TimeInterval(cursorTime, this.annotationDragInfo.RightAnnotation.Interval.Right);
}
this.UpdateDisplayData();
VisualizationContext.Instance.VisualizationContainer.Navigator.Cursor = cursorTime;
}
private void DoMouseDoubleClick(MouseButtonEventArgs e)
{
// Get the timeline scroller
TimelineScroller timelineScroller = this.FindTimelineScroller(e.Source);
// Get the time at the mouse cursor
DateTime cursorTime = this.GetTimeAtMousePointer(e.GetPosition(e.Source as IInputElement), timelineScroller, false);
// Get the item (if any) that straddles this time
int index = this.GetAnnotationIndexByTime(cursorTime);
if (index > -1)
{
// Get the annotation that was hit
Message <TimeIntervalAnnotation> annotation = this.Data[index];
// Set the navigator selection to the bounds of the annotation
TimeInterval annotationRange = annotation.Data.Interval;
VisualizationContext.Instance.VisualizationContainer.Navigator.SelectionRange.SetRange(annotationRange);
// If the shift key was down, then also zoom to the annotation (with 10% empty space to the left and right)
if (Keyboard.IsKeyDown(Key.LeftShift) || Keyboard.IsKeyDown(Key.RightShift))
{
double bufferSeconds = annotationRange.Span.TotalSeconds * 0.1d;
VisualizationContext.Instance.VisualizationContainer.Navigator.ViewRange.SetRange(annotationRange.Left.AddSeconds(-bufferSeconds), annotationRange.Right.AddSeconds(bufferSeconds));
}
}
}
private DateTime GetTimeAtMousePointer(MouseEventArgs e)
{
TimelineScroller root = this.FindTimelineScroller(e.Source);
if (root != null)
{
Point point = e.GetPosition(root);
double percent = point.X / root.ActualWidth;
var viewRange = this.Navigator.ViewRange;
DateTime time = viewRange.StartTime + TimeSpan.FromTicks((long)((double)viewRange.Duration.Ticks * percent));
return(time);
}
Console.WriteLine("TimelineVisualizationPanel.GetTimeAtMousePointer() - Could not find the TimelineScroller in the tree");
return(DateTime.UtcNow);
}
/// <summary>
/// Gets the timeline scroller parent of a framework element.
/// </summary>
/// <param name="sourceElement">The framework element to search from.</param>
/// <returns>The timeline scroller object.</returns>
public TimelineScroller GetTimelineScroller(object sourceElement)
{
if (this.timelineScroller == null)
{
// Walk up the visual tree until we either find the
// Timeline Scroller or fall off the top of the tree
DependencyObject target = sourceElement as DependencyObject;
while (target != null && !(target is TimelineScroller))
{
target = VisualTreeHelper.GetParent(target);
}
this.timelineScroller = target as TimelineScroller;
}
return(this.timelineScroller);
}
private DateTime GetTimeAtMousePointer(Point point, TimelineScroller root, bool useSnap)
{
double percent = point.X / root.ActualWidth;
var viewRange = this.Navigator.ViewRange;
DateTime time = viewRange.StartTime + TimeSpan.FromTicks((long)((double)viewRange.Duration.Ticks * percent));
// If we're currently snapping to some Visualization Object, adjust the time to the timestamp of the nearest message
DateTime?snappedTime = null;
if (useSnap)
{
IStreamVisualizationObject snapToVisualizationObject = this.Container.SnapToVisualizationObject as IStreamVisualizationObject;
if (snapToVisualizationObject != null)
{
snappedTime = snapToVisualizationObject.GetSnappedTime(time, SnappingBehavior.Nearest);
}
}
return(snappedTime ?? time);
}
private void DoMouseMove(MouseEventArgs e)
{
if (this.annotationDragInfo != null)
{
this.DragAnnotationEdge(e);
e.Handled = true;
}
else
{
// Get the timeline scroller and the canvas
TimelineScroller timelineScroller = this.FindTimelineScroller(e.Source);
Canvas canvas = this.FindCanvas(e.Source);
// Get the time at the mouse cursor
DateTime cursorTime = this.GetTimeAtMousePointer(e.GetPosition(e.Source as IInputElement), timelineScroller, false);
// Get the item (if any) that straddles this time
if (this.EnableAnnotationDrag)
{
int index = this.GetAnnotationIndexByTime(cursorTime);
if (index > -1)
{
AnnotationEdge annotationEdge = this.MouseOverAnnotationEdge(cursorTime, this.Data[index].Data, timelineScroller);
if (annotationEdge != AnnotationEdge.None)
{
canvas.Cursor = Cursors.SizeWE;
}
else
{
canvas.Cursor = Cursors.Arrow;
}
}
else
{
canvas.Cursor = Cursors.Arrow;
}
}
}
}
/// <summary>
/// Gets the time at the mouse pointer, optionally adjusting for visualization object snap.
/// </summary>
/// <param name="mouseEventArgs">A mouse event args object.</param>
/// <param name="useSnap">If true, and if a visualization object is currently being snapped to, then adjust the time to the nearest message in the visualization object being snapped to.</param>
/// <returns>The time represented by the mouse pointer.</returns>
public DateTime GetTimeAtMousePointer(MouseEventArgs mouseEventArgs, bool useSnap)
{
TimelineScroller root = this.GetTimelineScroller(mouseEventArgs.Source);
if (root != null)
{
Point point = mouseEventArgs.GetPosition(root);
double percent = point.X / root.ActualWidth;
var viewRange = this.Navigator.ViewRange;
DateTime time = viewRange.StartTime + TimeSpan.FromTicks((long)((double)viewRange.Duration.Ticks * percent));
// If we're currently snapping to some Visualization Object, adjust the time to the timestamp of the nearest message
DateTime?snappedTime = null;
if (useSnap == true && VisualizationContext.Instance.VisualizationContainer.SnapToVisualizationObject is IStreamVisualizationObject snapToVisualizationObject)
{
snappedTime = DataManager.Instance.GetTimeOfNearestMessage(snapToVisualizationObject.StreamSource, time, NearestMessageType.Nearest);
}
return(snappedTime ?? time);
}
return(DateTime.UtcNow);
}
private DateTime GetTimeAtMousePointer(MouseEventArgs e)
{
TimelineScroller root = this.FindTimelineScroller(e.Source);
if (root != null)
{
Point point = e.GetPosition(root);
double percent = point.X / root.ActualWidth;
var viewRange = this.Navigator.ViewRange;
DateTime time = viewRange.StartTime + TimeSpan.FromTicks((long)((double)viewRange.Duration.Ticks * percent));
// If we're currently snapping to some Visualization Object, adjust the time to the timestamp of the nearest message
DateTime?snappedTime = null;
if (VisualizationContext.Instance.VisualizationContainer.SnapToVisualizationObject is IStreamVisualizationObject snapToVisualizationObject)
{
snappedTime = snapToVisualizationObject.GetSnappedTime(time);
}
return(snappedTime ?? time);
}
Debug.WriteLine("TimelineVisualizationPanel.GetTimeAtMousePointer() - Could not find the TimelineScroller in the tree");
return(DateTime.UtcNow);
}
private AnnotationEdge MouseOverAnnotationEdge(DateTime cursorTime, TimeIntervalAnnotation annotation, TimelineScroller timelineScroller)
{
// Work out what time interval is expressed in 3 pixels at the current zoom
double percent = 5.0d / timelineScroller.ActualWidth;
var viewRange = this.Navigator.ViewRange;
TimeSpan hitTargetWidth = TimeSpan.FromTicks((long)((double)viewRange.Duration.Ticks * percent));
// Check if the mouse cursor is within 3 pixels of the left or right edge of the annoation
if (Math.Abs((annotation.Interval.Left - cursorTime).Ticks) <= hitTargetWidth.Ticks)
{
return(AnnotationEdge.Left);
}
if (Math.Abs((annotation.Interval.Right - cursorTime).Ticks) <= hitTargetWidth.Ticks)
{
return(AnnotationEdge.Right);
}
return(AnnotationEdge.None);
}
private void DoMouseLeftButtonDown(MouseButtonEventArgs e)
{
TimelineVisualizationPanel timelinePanel = this.Panel as TimelineVisualizationPanel;
// Get the time at the mouse cursor
DateTime cursorTime = timelinePanel.GetTimeAtMousePointer(e, false);
Message <TimeIntervalAnnotation> annotation = default;
AnnotationEdge annotationEdge = AnnotationEdge.None;
// Get the item (if any) that straddles this time
int index = this.GetAnnotationIndexByTime(cursorTime);
if (index > -1)
{
// Get the annotation that was hit
annotation = this.Data[index];
// Check if the mouse is over an edge of the annotation
annotationEdge = this.MouseOverAnnotationEdge(cursorTime, this.Data[index].Data, timelinePanel.GetTimelineScroller(e.Source));
}
// If the shift key is down, the user is dropping the start selection marker. If there is no VO currently being snapped
// to and the mouse is over an annotation edge, then manually set the selection marker right on the edge. Otherwise
// let the event bubble up to the timeline visualization panel which will set the selection marker in the usual fashion.
if (Keyboard.IsKeyDown(Key.LeftShift) || Keyboard.IsKeyDown(Key.RightShift))
{
if ((VisualizationContext.Instance.VisualizationContainer.SnapToVisualizationObject == null) && (annotationEdge != AnnotationEdge.None))
{
DateTime selectionMarkerTime = annotationEdge == AnnotationEdge.Left ? annotation.Data.Interval.Left : annotation.Data.Interval.Right;
this.Navigator.SelectionRange.SetRange(selectionMarkerTime, this.Navigator.SelectionRange.EndTime >= selectionMarkerTime ? this.Navigator.SelectionRange.EndTime : DateTime.MaxValue);
e.Handled = true;
}
else
{
return;
}
}
// If we're over an annotation
if (annotation != default)
{
if (annotationEdge == AnnotationEdge.None)
{
// We're over an annotation, but not an annotation edge, display the annotation's properties
this.SelectDisplayObject(annotation.Data);
// Begin annotation edit if it's enabled
if (this.EnableAnnotationValueEdit)
{
// Work out the track number to be edited based on the mouse position
TimelineScroller timelineScroller = timelinePanel.GetTimelineScroller(e.Source);
Point point = e.GetPosition(timelineScroller);
int trackId = (int)(point.Y / timelineScroller.ActualHeight * (double)annotation.Data.Values.Count);
// Find the display data object corresponding to the annotation and fire an edit event to the view
TimeIntervalAnnotationDisplayData displayObject = this.DisplayData.FirstOrDefault(d => d.Annotation.Data.Interval.Right == annotation.Data.Interval.Right);
this.TimeIntervalAnnotationEdit?.Invoke(this, new TimeIntervalAnnotationEditEventArgs(displayObject, trackId));
}
}
// Check if we're over an edge and annotation drag is enabled.
if (annotationEdge != AnnotationEdge.None && this.EnableAnnotationDrag)
{
// Get the previous and next annotations (if any) and check if they abut the annotation whose edge we're going to drag
Message <TimeIntervalAnnotation>?previousAnnotation = index > 0 ? this.Data[index - 1] : (Message <TimeIntervalAnnotation>?)null;
bool previousAnnotationAbuts = previousAnnotation != null && previousAnnotation.Value.Data.Interval.Right == annotation.Data.Interval.Left;
Message <TimeIntervalAnnotation>?nextAnnotation = index < this.Data.Count - 1 ? this.Data[index + 1] : (Message <TimeIntervalAnnotation>?)null;
bool nextAnnotationAbuts = nextAnnotation != null && nextAnnotation.Value.Data.Interval.Left == annotation.Data.Interval.Right;
// If the ALT key is down, then we will not try to move the annotation that abuts this one
bool moveNeighborAnnotation = !Keyboard.IsKeyDown(Key.LeftAlt) && !Keyboard.IsKeyDown(Key.RightAlt);
// Work out the minimum and maximum times we can drag the annotation's edge to
DateTime minTime;
DateTime maxTime;
if (annotationEdge == AnnotationEdge.Left)
{
maxTime = annotation.Data.Interval.Right;
if (previousAnnotation == null)
{
minTime = this.Navigator.ViewRange.StartTime;
}
else if (previousAnnotationAbuts && moveNeighborAnnotation)
{
minTime = previousAnnotation.Value.Data.Interval.Left;
}
else
{
minTime = previousAnnotation.Value.Data.Interval.Right;
}
}
else
{
minTime = annotation.Data.Interval.Left;
if (nextAnnotation == null)
{
maxTime = this.Navigator.ViewRange.EndTime;
}
else if (nextAnnotationAbuts && moveNeighborAnnotation)
{
maxTime = nextAnnotation.Value.Data.Interval.Right;
}
else
{
maxTime = nextAnnotation.Value.Data.Interval.Left;
}
}
// Create the drag data that specifies which annotation(s) to drag, and the minimum and maximum time we can drag to
if (annotationEdge == AnnotationEdge.Right)
{
this.annotationDragInfo = new TimeIntervalAnnotationDragInfo(annotation, moveNeighborAnnotation && nextAnnotationAbuts ? nextAnnotation : null, minTime, maxTime);
}
else
{
this.annotationDragInfo = new TimeIntervalAnnotationDragInfo(moveNeighborAnnotation && previousAnnotationAbuts ? previousAnnotation : null, annotation, minTime, maxTime);
}
}
}
else
{
// We're not over any annotation, cancel any current edit operation in the view and display the VO's properties
this.TimeIntervalAnnotationEdit?.Invoke(this, new TimeIntervalAnnotationEditEventArgs(null, 0));
this.SelectDisplayObject(null);
}
}
private AnnotationEdge MouseOverAnnotationEdge(DateTime cursorTime, TimeIntervalAnnotation annotation, TimelineScroller timelineScroller)
{
// Work out what time interval is expressed in 3 pixels at the current zoom
TimeSpan hitTargetWidth = this.PixelsToTimespan(5.0d, timelineScroller);
// Check if the mouse cursor is within 3 pixels of the left or right edge of the annoation
if (Math.Abs((annotation.Interval.Left - cursorTime).Ticks) <= hitTargetWidth.Ticks)
{
return(AnnotationEdge.Left);
}
if (Math.Abs((annotation.Interval.Right - cursorTime).Ticks) <= hitTargetWidth.Ticks)
{
return(AnnotationEdge.Right);
}
return(AnnotationEdge.None);
}
private void DoMouseLeftButtonDown(MouseButtonEventArgs e)
{
// Get the timeline scroller
TimelineScroller timelineScroller = this.FindTimelineScroller(e.Source);
// Get the time at the mouse cursor
DateTime cursorTime = this.GetTimeAtMousePointer(e.GetPosition(e.Source as IInputElement), timelineScroller, false);
// Get the item (if any) that straddles this time
int index = this.GetAnnotationIndexByTime(cursorTime);
if (index > -1)
{
// Get the annotation that was hit
Message <TimeIntervalAnnotation> annotation = this.Data[index];
Canvas canvas = this.FindCanvas(e.Source);
// Check if the mouse is over an edge of the annotation
AnnotationEdge annotationEdge = this.MouseOverAnnotationEdge(cursorTime, this.Data[index].Data, timelineScroller);
if (annotationEdge != AnnotationEdge.None && this.EnableAnnotationDrag)
{
// Get the previous and next annotations (if any) and check if they abut the annotation whose edge we're going to drag
Message <TimeIntervalAnnotation>?previousAnnotation = index > 0 ? this.Data[index - 1] : (Message <TimeIntervalAnnotation>?)null;
bool previousAnnotationAbuts = previousAnnotation != null && previousAnnotation.Value.Data.Interval.Right == annotation.Data.Interval.Left;
Message <TimeIntervalAnnotation>?nextAnnotation = index < this.Data.Count - 1 ? this.Data[index + 1] : (Message <TimeIntervalAnnotation>?)null;
bool nextAnnotationAbuts = nextAnnotation != null && nextAnnotation.Value.Data.Interval.Left == annotation.Data.Interval.Right;
// If the ALT key is down, then we will not try to move the annotation that abuts this one
bool moveNeighborAnnotation = !Keyboard.IsKeyDown(Key.LeftAlt) && !Keyboard.IsKeyDown(Key.RightAlt);
// Work out the minimum and maximum times we can drag the annotation's edge to
DateTime minTime;
DateTime maxTime;
if (annotationEdge == AnnotationEdge.Left)
{
maxTime = annotation.Data.Interval.Right;
if (previousAnnotation == null)
{
minTime = this.Navigator.ViewRange.StartTime;
}
else if (previousAnnotationAbuts && moveNeighborAnnotation)
{
minTime = previousAnnotation.Value.Data.Interval.Left;
}
else
{
minTime = previousAnnotation.Value.Data.Interval.Right;
}
}
else
{
minTime = annotation.Data.Interval.Left;
if (nextAnnotation == null)
{
maxTime = this.Navigator.ViewRange.EndTime;
}
else if (nextAnnotationAbuts && moveNeighborAnnotation)
{
maxTime = nextAnnotation.Value.Data.Interval.Right;
}
else
{
maxTime = nextAnnotation.Value.Data.Interval.Left;
}
}
// Create the drag data that specifies which annotation(s) to drag, and the minimum and maximum time we can drag to
if (annotationEdge == AnnotationEdge.Right)
{
this.annotationDragInfo = new TimeIntervalAnnotationDragInfo(annotation, moveNeighborAnnotation && nextAnnotationAbuts ? nextAnnotation : null, minTime, maxTime);
}
else
{
this.annotationDragInfo = new TimeIntervalAnnotationDragInfo(moveNeighborAnnotation && previousAnnotationAbuts ? previousAnnotation : null, annotation, minTime, maxTime);
}
}
else
{
this.SelectDisplayObject(annotation.Data);
}
e.Handled = true;
}
else
{
this.SelectDisplayObject(null);
}
}
