private void UndoRedo(Stack source, Stack dest)
{
if (source != null && source.Count != 0) {
listSSA.BeginUpdate();
object undo = source.Pop();
LineUndo lu;
if (undo is List<Line>) { // New list
dest.Push(lineColl);
lineColl = (List<Line>)undo;
}
else if (undo is List<int>) { // Added multiple lines
List<LineUndo> redolu = new List<LineUndo>();
List<int> undointlist = (List<int>)undo;
int rindex;
for (int index = 0; index != undointlist.Count; index+=1) {
lu = new LineUndo();
rindex = undointlist[index];
lu.index = rindex;
lu.line = lineColl[rindex];
redolu.Add(lu);
lineColl.RemoveAt(rindex);
}
dest.Push(redolu);
}
else if (undo is List<LineUndo>) { // Deleted multiple lines
List<int> redoint = new List<int>();
List<LineUndo> undolulist = (List<LineUndo>)undo;
for (int index = 0; index != undolulist.Count; index+=1) {
lu = (LineUndo)undolulist[index];
redoint.Add(lu.index);
lineColl.Insert(lu.index, lu.line);
}
dest.Push(redoint);
}
else if (undo is int) { // added one line
lu.index = (int)undo;
lu.line = lineColl[lu.index];
lineColl.RemoveAt(lu.index);
dest.Push(lu);
}
else if (undo is LineUndo) { // deleted one line
lu = (LineUndo)undo;
dest.Push(lu.index);
lineColl.Insert(lu.index, lu.line);
}
else if (undo is LineCUndo) { // Changed a line
LineCUndo luold = (LineCUndo)undo;
Line lold = lineColl[luold.index];
lineColl[luold.index] = luold.line;
luold.line = lold;
dest.Push(luold);
}
listSSA.VirtualListSize = lineColl.Count;
listSSA.EndUpdate();
menuUndo.Enabled = undoStack.Count != 0;
menuRedo.Enabled = redoStack.Count != 0;
}
ExtractStyles();
}
private void menuRemoveLine_Click(object sender, System.EventArgs e)
{
if (lineColl != null && undoStack != null) {
listSSA.BeginUpdate();
List<LineUndo> lul = new List<LineUndo>();
LineUndo lu;
for (int index = lineColl.Count - 1; index != -1; index--) {
if (lineColl[index].selected) {
listSSA.VirtualListSize--;
lu = new LineUndo();
lu.index = index;
lu.line = lineColl[index];
lul.Add(lu);
lineColl.RemoveAt(index);
}
}
undoStack.Push(lul);
menuUndo.Enabled = true;
listSSA.EndUpdate();
}
}