/// <summary>
/// Select all elements that are in the drag selection rectangle.
/// </summary>
private void ApplyDragSelectionRect()
{
dragSelectionCanvas.Visibility = Visibility.Collapsed;
double x = Canvas.GetLeft(dragSelectionBorder);
double y = Canvas.GetTop(dragSelectionBorder);
double width = dragSelectionBorder.Width;
double height = dragSelectionBorder.Height;
Rect dragRect = new Rect(x, y, width, height);
//
// Inflate the drag selection-rectangle by 1/10 of its size to
// make sure the intended item is selected.
//
dragRect.Inflate(width / 10, height / 10);
//
// Clear the current selection.
//
listBox.SelectedItems.Clear();
//
// Find and select all the list box items.
//
foreach (KeyframeViewModel key in keyItems)
{
double KeyPosition = CanvasCalculator.GetCanvasOffset(ActualWidth, TimeRangeStart, TimeRangeEnd, key.Time);
Rect itemRect = new Rect(KeyPosition, 2, 8, 20);
if (dragRect.Contains(itemRect))
{
listBox.SelectedItems.Add(key);
}
}
}
public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
{
//Index 0 = width
//Index 1 = TimeRangeStart
//Index 2 = TimeRangeEnd
//Index 3 = Time
double actualWidth = (double)values[0];
int timeRangeStart = (int)values[1];
int timeRangeEnd = (int)values[2];
int time = (int)values[3];
return(CanvasCalculator.GetCanvasOffset(actualWidth, timeRangeStart, timeRangeEnd, time) - 3);
}
//private void InvalidatePositions()
//{
// foreach(KeyframeListItem key in keyItems)
// {
// key.TimelinePositionX = GetCanvasPosition(key.Time) - 3;
// }
// //System.Diagnostics.Debug.WriteLine("InvalidatePositions");
//}
private double GetCanvasPosition(int time)
{
return(CanvasCalculator.GetCanvasOffset(ActualWidth, TimeRangeStart, TimeRangeEnd, time));
}