public void RecordUndoAction(string strDesc, UndoMgr undo)
{
if (undo == null)
{
return;
}
UndoData data = GetUndoData();
// Don't record anything if there aren't any changes
if (!data.Equals(m_snapshot))
{
UndoAction_SpriteEdit action = new UndoAction_SpriteEdit(undo, m_ss, this, m_snapshot, data, strDesc);
undo.Push(action);
// Update the snapshot for the next UndoAction
RecordSnapshot();
}
}
public void Test_AddSprite_draw_redo()
{
Sprite s = m_ss.AddSprite(1, 1, "sample", 0, "", 0, m_mgr);
Assert.IsNotNull(s);
Assert.AreEqual(1, m_mgr.Count);
Assert.AreEqual(0, m_mgr.Current);
Assert.IsTrue(m_mgr.CanUndo());
Assert.IsFalse(m_mgr.CanRedo());
// Draw a pixel.
int x1 = 3, y1 = 4;
int color1 = 1;
s.SetPixel(x1, y1, color1);
Assert.AreEqual(color1, s.GetPixel(x1, y1));
s.RecordUndoAction("pencil1", m_mgr);
Assert.AreEqual(2, m_mgr.Count);
Assert.AreEqual(1, m_mgr.Current);
UndoAction_SpriteEdit u1 = m_mgr.GetCurrent() as UndoAction_SpriteEdit;
Assert.AreEqual(0, u1.Before.tiles[0].pixels[x1, y1]);
Assert.AreEqual(color1, u1.After.tiles[0].pixels[x1, y1]);
Assert.IsTrue(m_mgr.CanUndo());
Assert.IsFalse(m_mgr.CanRedo());
// Undo the pixel draw.
m_mgr.ApplyUndo();
Assert.AreEqual(2, m_mgr.Count);
Assert.AreEqual(0, m_mgr.Current);
// Pencil mark reverted.
Assert.AreEqual(0, s.GetPixel(x1, y1));
Assert.IsTrue(m_mgr.CanUndo());
Assert.IsTrue(m_mgr.CanRedo());
// Redo the pixel draw.
m_mgr.ApplyRedo();
Assert.AreEqual(2, m_mgr.Count);
Assert.AreEqual(1, m_mgr.Current);
Assert.AreEqual(color1, s.GetPixel(x1, y1));
Assert.IsTrue(m_mgr.CanUndo());
Assert.IsFalse(m_mgr.CanRedo());
}
/// <summary>
/// Scan backwards in the undo stack for the most recently edited sprite.
/// This is used to select a sprite when the current one is deleted.
/// </summary>
/// <returns>The most recent Sprite, or null if a suitable Sprite cannot be found.</returns>
public Sprite FindMostRecentSprite()
{
for (int i = m_nCurrent - 1; i >= 0; i--)
{
// Use sprite from most recent edit.
UndoAction_SpriteEdit action_edit = m_history[i] as UndoAction_SpriteEdit;
if (action_edit != null)
{
return(action_edit.GetSprite);
}
// Use sprite from most recent Add (not Delete, since the sprite doesn't exist anymore).
UndoAction_AddSprite action_add = m_history[i] as UndoAction_AddSprite;
if (action_add != null && action_add.Add)
{
return(action_add.GetSprite);
}
}
return(null);
}
public void RecordUndoAction(string strDesc, UndoMgr undo)
{
if (undo == null)
return;
UndoData data = GetUndoData();
// Don't record anything if there aren't any changes
if (!data.Equals(m_snapshot))
{
UndoAction_SpriteEdit action = new UndoAction_SpriteEdit(undo, m_ss, this, m_snapshot, data, strDesc);
undo.Push(action);
// Update the snapshot for the next UndoAction
RecordSnapshot();
}
}
public void Test_AddSprite_draw_undo()
{
Sprite s = m_ss.AddSprite(1, 1, "sample", 0, "", 0, m_mgr);
Assert.IsNotNull(s);
Assert.AreEqual(1, m_mgr.Count);
Assert.AreEqual(0, m_mgr.Current);
Assert.IsTrue(m_mgr.CanUndo());
Assert.IsFalse(m_mgr.CanRedo());
// Draw a pixel.
int x1 = 3, y1 = 4;
int color1 = 1;
s.SetPixel(x1, y1, color1);
Assert.AreEqual(color1, s.GetPixel(x1, y1));
s.RecordUndoAction("pencil1", m_mgr);
Assert.AreEqual(2, m_mgr.Count);
Assert.AreEqual(1, m_mgr.Current);
UndoAction_SpriteEdit u1 = m_mgr.GetCurrent() as UndoAction_SpriteEdit;
Assert.AreEqual(0, u1.Before.tiles[0].pixels[x1, y1]);
Assert.AreEqual(color1, u1.After.tiles[0].pixels[x1, y1]);
Assert.IsTrue(m_mgr.CanUndo());
Assert.IsFalse(m_mgr.CanRedo());
// Draw another pixel.
int x2 = 4, y2 = 5;
int color2 = 2;
s.SetPixel(x2, y2, color2);
Assert.AreEqual(color2, s.GetPixel(x2, y2));
s.RecordUndoAction("pencil2", m_mgr);
Assert.AreEqual(3, m_mgr.Count);
Assert.AreEqual(2, m_mgr.Current);
UndoAction_SpriteEdit u2 = m_mgr.GetCurrent() as UndoAction_SpriteEdit;
Assert.AreEqual(0, u2.Before.tiles[0].pixels[x2, y2]);
Assert.AreEqual(color2, u2.After.tiles[0].pixels[x2, y2]);
Assert.IsTrue(m_mgr.CanUndo());
Assert.IsFalse(m_mgr.CanRedo());
// Undo the last pixel draw.
m_mgr.ApplyUndo();
Assert.AreEqual(3, m_mgr.Count);
Assert.AreEqual(1, m_mgr.Current);
// Last pencil reverted.
Assert.AreEqual(0, s.GetPixel(x2, y2));
// First pencil still present.
Assert.AreEqual(color1, s.GetPixel(x1, y1));
Assert.IsTrue(m_mgr.CanUndo());
Assert.IsTrue(m_mgr.CanRedo());
// Undo the first pixel draw.
m_mgr.ApplyUndo();
Assert.AreEqual(3, m_mgr.Count);
Assert.AreEqual(0, m_mgr.Current);
// Both pencil marks reverted.
Assert.AreEqual(0, s.GetPixel(x1, y1));
Assert.AreEqual(0, s.GetPixel(x2, y2));
Assert.IsTrue(m_mgr.CanUndo());
Assert.IsTrue(m_mgr.CanRedo());
// Undo the sprite add.
m_mgr.ApplyUndo();
Assert.AreEqual(3, m_mgr.Count);
Assert.AreEqual(-1, m_mgr.Current);
Assert.IsFalse(m_mgr.CanUndo());
Assert.IsTrue(m_mgr.CanRedo());
}
