/// <summary> Interface method to remove a drawing from the group
///
/// </summary>
/// <param name="d">the drawing to remove
/// </param>
public virtual void remove(Drawing d)
{
if (origin == READ)
{
origin = READ_WRITE;
numBlips = BStoreContainer.NumBlips;
Dgg dgg = (Dgg)escherData.Children[0];
drawingGroupId = dgg.getCluster(1).drawingGroupId - numBlips - 1;
}
// Get the blip
EscherRecord[] children = BStoreContainer.Children;
BlipStoreEntry bse = (BlipStoreEntry)children[d.BlipId - 1];
bse.dereference();
if (bse.ReferenceCount == 0)
{
// Remove the blip
BStoreContainer.remove(bse);
// Adjust blipId on the other blips
foreach (Drawing drawing in drawings)
{
if (drawing.BlipId > d.BlipId)
{
drawing.setObjectId(drawing.getObjectId(), drawing.BlipId - 1);
}
}
numBlips--;
}
}
/// <summary> Adds a drawing from the public, writable interface
///
/// </summary>
/// <param name="d">the drawing to add
/// </param>
public virtual void add(Drawing d)
{
if (origin == READ)
{
origin = READ_WRITE;
numBlips = BStoreContainer.NumBlips;
Dgg dgg = (Dgg)escherData.Children[0];
drawingGroupId = dgg.getCluster(1).drawingGroupId - numBlips - 1;
}
// See if this is referenced elsewhere
Drawing refImage = (Drawing)imageFiles[d.ImageFilePath];
if (refImage == null)
{
// There are no other references to this drawing, so assign
// a new object id and put it on the hash map
drawings.Add(d);
d.DrawingGroup = this;
d.setObjectId(numBlips + 1, numBlips + 1);
numBlips++;
imageFiles[d.ImageFilePath] = d;
}
else
{
// This drawing is used elsewhere in the workbook. Increment the
// reference count on the drawing, and set the object id of the drawing
// passed in
refImage.ReferenceCount = refImage.ReferenceCount + 1;
d.DrawingGroup = this;
d.setObjectId(refImage.getObjectId(), refImage.BlipId);
}
}