/**
* PUBLIC METHODS
**/
/// <summary>
/// Adds a new picture element to the timeline (before the given element)
/// </summary>
/// <param name="startTime">the start time for the new element</param>
/// <param name="endTime">the end time for the new element</param>
/// <param name="thumbnail">The path to the picture (should be absolute)</param>
/// <param name="transitionId">The ID of the transition which should be shown before the slide (-1 for no transition)</param>
/// <param name="transitionExecutionTime">The time the transition should last (in ms). Parameter is ignored if the transition id is invalid</param>
/// <param name="addBefore">The element id of the element which should be after the added element</param>
public void AddPictureElement(double startTime, double endTime, string thumbnail, int transitionId, int transitionExecutionTime, int addBefore)
{
TimelinePictureElementControl element = new TimelinePictureElementControl(this, startTime, endTime, thumbnail);
element.Transition = Transition.getByID(transitionId);
if (element.Transition != null)
{
element.Transition.ExecutionTime = transitionExecutionTime;
}
if (addBefore > -1)
{
//Push All elements and add new element
double pushAllTime = endTime - startTime;
for (int i = addBefore; i < PictureElements.Count; i++)
{
PictureElements[i].StartTime += pushAllTime;
PictureElements[i].EndTime += pushAllTime;
}
PictureElements.Insert(addBefore, element);
Pack();
}
else
{
PictureElements.Add(element);
}
if (MainCanvas.ActualWidth < GetLastPictureElementEndtime())
{
MainCanvas.Width = GetLastPictureElementEndtime() + 100;
MainScrollbar.ScrollToRightEnd();
}
UpdateExportButton();
}
/// <summary>
/// Adds an empty slide (blank, black) at the end
/// </summary>
public void AddEmptySlide()
{
TimelinePictureElementControl element = new TimelinePictureElementControl(this, GetLastPictureElementEndtime(), GetLastPictureElementEndtime() + 200, null);
PictureElements.Add(element);
if (MainCanvas.ActualWidth < GetLastPictureElementEndtime())
{
MainCanvas.Width = GetLastPictureElementEndtime() + 100;
MainScrollbar.ScrollToRightEnd();
}
}
/// <summary>
/// Scroll with the mouse scroller the timeline
/// </summary>
/// <param name="sender">event sender</param>
/// <param name="e">event args</param>
private void MainCanvas_MouseWheel(object sender, MouseWheelEventArgs e)
{
MainScrollbar.ScrollToHorizontalOffset(MainScrollbar.HorizontalOffset - e.Delta);
}