/// <summary>
/// Called when we want to undo a change in the model.
/// </summary>
/// <param name="clearUndoneModel">Set to false if you want it to
/// be possible to redo the action.</param>
internal void Undo(Boolean clearUndoneModel)
{
ModelHistoryItem historyItem = mModelHistory.Undo(clearUndoneModel);
if (historyItem != null)
{
mPlayModel = historyItem.model;
viewPanel.CurrentFrame = mPlayModel.GetFrame(viewPanel.CurrentFrame.UniqueId);
if (viewPanel.CurrentFrame == null)
{
viewPanel.CurrentFrame = mPlayModel.FirstFrame();
}
viewPanel.Refresh();
// Need to tell the frame collection that the model has changed as well
// since it usually finds out from the ModelChanged function of the
// main designer form (which isn't called during an undo).
frameCollection.ModelChanged(mPlayModel);
frameCollection.CurrentFrameChanged(viewPanel.CurrentFrame);
}
// Each time the model changes we check to see whether the undo/redo
// buttons should be greyed out.
undoToolStripMenuItem.Enabled = mModelHistory.CanUndo();
redoToolStripMenuItem.Enabled = mModelHistory.CanRedo();
}
/// <summary>
/// External load routine. Needs to be internal so that it can be called
/// from the application wide key handler.
/// </summary>
internal void LoadPlay()
{
using (OpenFileDialog openDialog = new OpenFileDialog())
{
openDialog.CheckFileExists = true;
openDialog.CheckPathExists = true;
openDialog.Multiselect = false;
openDialog.Title = "Open Play";
openDialog.AddExtension = true;
openDialog.Filter = "Play (*.ply)|*.ply";
if (openDialog.ShowDialog(this) == System.Windows.Forms.DialogResult.OK)
{
using (Stream fileStream = openDialog.OpenFile())
{
BinaryFormatter bin = new BinaryFormatter();
mPlayModel = (PlayModel)bin.Deserialize(fileStream);
}
frameCollection.ModelChanged(mPlayModel);
ChangeDisplayedFrame(mPlayModel.FirstFrame());
// Clear the history as this is a completely new play model.
mModelHistory.Clear();
mModelHistory.ModelChange(mPlayModel);
}
}
}