public override void Undo(Layers list)
{
// Add all objects from clone list to list -
// opposite to DeleteAll
foreach (DrawObject o in cloneList)
{
list[list.ActiveLayerIndex].Graphics.Add(o);
}
}
public DrawArea()
{
// create list of Layers, with one default active visible layer
_layers = new Layers();
_layers.CreateNewLayer("Default");
_panning = false;
_panX = 0;
_panY = 0;
// This call is required by the Windows.Forms Form Designer.
InitializeComponent();
}
// Create this command BEFORE applying Delete All function.
public CommandDeleteAll(Layers list)
{
cloneList = new List<DrawObject>();
// Make clone of the whole list.
// Add objects in reverse order because GraphicsList.Add
// insert every object to the beginning.
int n = list[list.ActiveLayerIndex].Graphics.Count;
for ( int i = n - 1; i >= 0; i-- )
{
cloneList.Add(list[list.ActiveLayerIndex].Graphics[i].Clone());
}
}
public LayerDialog(Layers _layers)
{
InitializeComponent();
for (int i = 0; i < _layers.Count; i++)
{
LayerEdit le = new LayerEdit();
le.LayerName = ((Layer)_layers[i]).LayerName;
le.LayerVisible = ((Layer)_layers[i]).IsVisible;
le.LayerActive = ((Layer)_layers[i]).IsActive;
layerList.Add(le);
}
dgvLayers.DataSource = layerList;
dgvLayers.Columns[0].HeaderText = "Layer Name";
dgvLayers.Columns[1].HeaderText = "New Layer";
dgvLayers.Columns[2].HeaderText = "Active";
dgvLayers.Columns[3].HeaderText = "Deleted";
dgvLayers.Columns[4].HeaderText = "Visible";
}
public UndoManager(Layers layerList)
{
this.layers = layerList;
ClearHistory();
}
// This command is used to make Redo operation.
// It makes original command again.
//public abstract void Redo(GraphicsList list);
public abstract void Redo(Layers list);
// This function is used to make Undo operation.
// It makes action opposite to the original command.
//public abstract void Undo(GraphicsList list);
public abstract void Undo(Layers list);
public override void Redo(Layers list)
{
// Replace all objects in the list with objects from listAfter
ReplaceObjects(list[activeLayer].Graphics, listAfter);
}
public override void Undo(Layers list)
{
// Replace all objects in the list with objects from listBefore
ReplaceObjects(list[activeLayer].Graphics, listBefore);
}
// Call this function AFTER operation.
public void NewState(Layers layerList)
{
// Keep objects state after operation.
FillList(layerList[activeLayer].Graphics, ref listAfter);
}
// Create this command BEFORE operation.
public CommandChangeState(Layers layerList)
{
// Keep objects state before operation.
activeLayer = layerList.ActiveLayerIndex;
FillList(layerList[activeLayer].Graphics, ref listBefore);
}
public override void Redo(Layers list)
{
// Clear list - make DeleteAll again
list[list.ActiveLayerIndex].Graphics.Clear();
}
/// <summary>
/// Redo last Add command
/// </summary>
/// <param name="list">Layers collection</param>
public override void Redo(Layers list)
{
list[list.ActiveLayerIndex].Graphics.UnselectAll();
list[list.ActiveLayerIndex].Graphics.Add(drawObject);
}
/// <summary>
/// Undo last Add command
/// </summary>
/// <param name="list">Layers collection</param>
public override void Undo(Layers list)
{
list[list.ActiveLayerIndex].Graphics.DeleteLastAddedObject();
}
/// <summary>
/// Redo last Add command
/// </summary>
/// <param name="list">Layers collection</param>
public override void Redo(Layers list)
{
list[list.ActiveLayerIndex].Graphics.UnselectAll();
list[list.ActiveLayerIndex].Graphics.Add(drawObject);
}
/// <summary>
/// Undo last Add command
/// </summary>
/// <param name="list">Layers collection</param>
public override void Undo(Layers list)
{
list[list.ActiveLayerIndex].Graphics.DeleteLastAddedObject();
}
