/// <summary>
/// Groups all annotations of annotation collection.
/// </summary>
/// <param name="annotationViewer">The annotation viewer.</param>
/// <param name="undoManager">The undo manager.</param>
public static void GroupAllAnnotations(AnnotationViewer annotationViewer, CompositeUndoManager undoManager)
{
// cancel the annotation building
annotationViewer.CancelAnnotationBuilding();
// get reference to the annotation collection of focused image
AnnotationDataCollection annotationDataCollection = annotationViewer.AnnotationDataController[annotationViewer.FocusedIndex];
if (annotationDataCollection.Count == 0)
{
return;
}
// begin the composite undo action
undoManager.BeginCompositeAction("Group all annotations");
try
{
// save the references to annotations in array
AnnotationData[] annotationDataArray = annotationDataCollection.ToArray();
// clear the annotation collection of focused image
annotationDataCollection.Clear();
// create the group annotation
GroupAnnotationData groupAnnotationData = new GroupAnnotationData();
// for each annotation in array
for (int i = 0; i < annotationDataArray.Length; i++)
{
// add annotations from array to group annotation
groupAnnotationData.Items.Add(annotationDataArray[i]);
}
// add the group annotation to the annotation collection of focused image
annotationDataCollection.Add(groupAnnotationData);
annotationViewer.FocusedAnnotationData = groupAnnotationData;
}
finally
{
// end the composite undo action
undoManager.EndCompositeAction();
}
}
/// <summary>
/// Groups/ungroups selected annotations of annotation collection.
/// </summary>
/// <param name="annotationViewer">The annotation viewer.</param>
/// <param name="undoManager">The undo manager.</param>
public static void GroupUngroupSelectedAnnotations(AnnotationViewer annotationViewer, CompositeUndoManager undoManager)
{
// cancel annotation building
annotationViewer.CancelAnnotationBuilding();
// get selected annotations
Collection <AnnotationView> selectedAnnotations = annotationViewer.AnnotationVisualTool.SelectedAnnotations;
if (selectedAnnotations.Count == 0)
{
return;
}
// if several annotations are selected
if (selectedAnnotations.Count > 1)
{
// begin the composite undo action
undoManager.BeginCompositeAction("Group annotations");
try
{
// create group annotation data
GroupAnnotationData groupAnnotationData = new GroupAnnotationData();
// create annotation view array
AnnotationView[] annotations = new AnnotationView[selectedAnnotations.Count];
// copy selected annotations to array
selectedAnnotations.CopyTo(annotations, 0);
// for each annotation in array
foreach (AnnotationView view in annotations)
{
groupAnnotationData.Items.Add(view.Data);
annotationViewer.AnnotationDataCollection.Remove(view.Data);
}
// add group annotation to viewer
annotationViewer.AnnotationDataCollection.Add(groupAnnotationData);
// update focused annotation data
annotationViewer.FocusedAnnotationData = groupAnnotationData;
// update selected annotations
annotationViewer.AnnotationVisualTool.SelectedAnnotations.Clear();
annotationViewer.AnnotationVisualTool.SelectedAnnotations.Add(annotationViewer.FocusedAnnotationView);
}
finally
{
// end the composite undo action
undoManager.EndCompositeAction();
}
}
else
{
GroupAnnotationView groupAnnotationView = annotationViewer.AnnotationVisualTool.SelectedAnnotations[0] as GroupAnnotationView;
// if focused annotation is group
if (groupAnnotationView != null)
{
// begin the composite undo action
undoManager.BeginCompositeAction("Ungroup annotations");
try
{
// clear selected annotations
selectedAnnotations.Clear();
// get annotation data
GroupAnnotationData groupAnnotationData = (GroupAnnotationData)groupAnnotationView.Data;
// remove group annotation from annotation data collection
annotationViewer.AnnotationDataCollection.Remove(groupAnnotationData);
// add group annotation items to annotation data collection
annotationViewer.AnnotationDataCollection.AddRange(groupAnnotationData.Items.ToArray());
// if the annotation viewer allows multiple selection of annotations
if (annotationViewer.AnnotationMultiSelect)
{
// for each annotation data in group annotation items
foreach (AnnotationData itemData in groupAnnotationData.Items)
{
selectedAnnotations.Add(annotationViewer.AnnotationViewCollection.FindView(itemData));
}
}
// remove annotations from group annotation
groupAnnotationData.Items.Clear();
// dispose group annotation
groupAnnotationData.Dispose();
}
finally
{
// end the composite undo action
undoManager.EndCompositeAction();
}
}
}
}
