private void _backward()
{
List <object> deletedList = new List <object>();
try
{
int lastIndex = MyBoardObjects.Count - 1;
object obj = MyBoardObjects[lastIndex];
if (obj is MySketch)
{
MySketch tempSketch = obj as MySketch;
int no_lines = tempSketch.pointsSet.Count - 1;
///<summary>To removet the no_lines number of lines</summary>
MyBoard.Children.RemoveRange(MyBoard.Children.Count - no_lines, no_lines - 1);
deletedList.Add(MyBoardObjects[lastIndex]);
MyBoardObjects.RemoveAt(lastIndex);
}
else
{
deletedList.Add(MyBoardObjects[lastIndex]);
MyBoardObjects.RemoveAt(lastIndex);
MyBoard.Children.RemoveAt(MyBoard.Children.Count - 1);
}
deletedObjects.Push(deletedList);
}
catch (Exception) { }
}
//private Point _start, _end;
//List<object> MyBoardObjects;
#endregion
#region Window Load Events
/*
* private void MainWindow_Loaded(object sender, RoutedEventArgs e)
* {
*
* }*/
private void MainWindow_Closing(object sender, System.ComponentModel.CancelEventArgs e)
{
foreach (var obj in MyBoardObjects)
{
if (obj is Line)
{
Line line = obj as Line;
line.IsEnabled = false;
}
else if (obj is Rectangle)
{
Rectangle temprect = obj as Rectangle;
temprect.IsEnabled = false;
}
else if (obj is Ellipse)
{
Ellipse tempell = obj as Ellipse;
tempell.IsEnabled = false;
}
else if (obj is PointCollection)
{
PointCollection pntc = obj as PointCollection;
pntc.Clear();
}
}
MyBoardObjects.Clear();
MyBoard.Children.Clear();
}
private void _forward()
{
List <object> lastObj;
if (deletedObjects.Count == 0)
{
return;
}
lastObj = deletedObjects.Pop();
foreach (object obj in lastObj)
{
if (obj is MySketch)
{
MySketch mySketch = obj as MySketch;
PointCollection points = mySketch.pointsSet;
try
{
addLines(points);
MyBoardObjects.Add(mySketch);
}
catch (Exception) { }
}
else if (obj is MyRectangle)
{
MyRectangle myrect = obj as MyRectangle;
try
{
MyBoard.Children.Add(myrect.rect);
MyBoardObjects.Add(myrect);
}
catch (Exception) { }
}
else if (obj is MyLine)
{
MyLine myline = obj as MyLine;
try
{
MyBoard.Children.Add(myline._line);
MyBoardObjects.Add(myline);
}
catch (Exception) { }
}
else if (obj is MyEllipse)
{
MyEllipse myelli = obj as MyEllipse;
try
{
MyBoard.Children.Add(myelli.ellipse);
MyBoardObjects.Add(myelli);
}
catch (Exception) { }
}
else
{
}
}
}
private void btn_Clear_Click(object sender, RoutedEventArgs e)
{
MyBoard.Children.Clear();
if (MyBoardObjects.Count > 0)
{
deletedObjects.Push(MyBoardObjects);
}
MyBoardObjects.Clear();
}
