/// <summary>
/// Executes a HistoryFunction in the context of this DocumentWorkspace.
/// </summary>
/// <param name="function">The HistoryFunction to execute.</param>
/// <remarks>
/// Depending on the HistoryFunction, the currently active tool may be refreshed.
/// </remarks>
public HistoryFunctionResult ExecuteFunction(HistoryFunction function)
{
HistoryFunctionResult result;
bool nullTool = false;
if ((function.ActionFlags & ActionFlags.KeepToolActive) != ActionFlags.KeepToolActive)
{
PushNullTool();
Update();
nullTool = true;
}
try
{
using (new WaitCursorChanger(this))
{
HistoryMemento hm = null;
string errorText;
try
{
bool cancelled = false;
if ((function.ActionFlags & ActionFlags.ReportsProgress) != ActionFlags.ReportsProgress)
{
hm = function.Execute(this);
}
else
{
ProgressDialog pd = new ProgressDialog();
bool pdLoaded = false;
bool closeAtLoad = false;
EventHandler loadCallback =
delegate(object sender, EventArgs e)
{
pdLoaded = true;
if (closeAtLoad)
{
pd.Close();
}
};
ProgressEventHandler progressCallback =
delegate(object sender, ProgressEventArgs e)
{
if (pdLoaded)
{
double newValue = Utility.Clamp(e.Percent, 0.0, 100.0);
pd.Value = newValue;
}
};
EventHandler<EventArgs<HistoryMemento>> finishedCallback =
delegate(object sender, EventArgs<HistoryMemento> e)
{
hm = e.Data;
if (pdLoaded)
{
// TODO: fix ProgressDialog's very weird interface
pd.ExternalFinish();
pd.Close();
}
else
{
closeAtLoad = true;
}
};
EventHandler cancelClickCallback =
delegate(object sender, EventArgs e)
{
cancelled = true;
function.RequestCancel();
//pd.Cancellable = false;
};
pd.Text = PdnInfo.GetBareProductName();
pd.Description = PdnResources.GetString("ExecuteFunction.ProgressDialog.Description.Text");
pd.Load += loadCallback;
pd.Cancellable = false; //function.Cancellable;
pd.CancelClick += cancelClickCallback;
function.Progress += progressCallback;
function.BeginExecute(this, this, finishedCallback);
pd.ShowDialog(this);
pd.Dispose();
}
if (hm == null && !cancelled)
{
result = HistoryFunctionResult.SuccessNoOp;
}
else if (hm == null && cancelled)
{
result = HistoryFunctionResult.Cancelled;
}
else
{
result = HistoryFunctionResult.Success;
}
errorText = null;
}
catch (HistoryFunctionNonFatalException hfnfex)
{
if (hfnfex.InnerException is OutOfMemoryException)
{
result = HistoryFunctionResult.OutOfMemory;
}
else
{
result = HistoryFunctionResult.NonFatalError;
}
if (hfnfex.LocalizedErrorText != null)
{
errorText = hfnfex.LocalizedErrorText;
}
else
{
if (hfnfex.InnerException is OutOfMemoryException)
{
errorText = PdnResources.GetString("ExecuteFunction.GenericOutOfMemory");
}
else
{
errorText = PdnResources.GetString("ExecuteFunction.GenericError");
}
}
}
if (errorText != null)
{
Utility.ErrorBox(this, errorText);
}
if (hm != null)
{
History.PushNewMemento(hm);
}
}
}
finally
{
if (nullTool)
{
PopNullTool();
}
}
return result;
}
protected DialogResult ShowDialog(bool cancellable, bool marqueeProgress, ThreadStart callback)
{
this.threadCallback = callback;
DialogResult dr = DialogResult.Cancel;
using (this.dialog = new ProgressDialog())
{
dialog.Text = dialogTitle;
dialog.Description = dialogDescription;
if (marqueeProgress)
{
dialog.PercentTextVisible = false;
dialog.MarqueeMode = true;
}
if (icon != null)
{
dialog.Icon = icon;
}
EventHandler leh = new EventHandler(dialog_Load);
dialog.Load += leh;
dialog.Cancellable = cancellable;
if (cancellable)
{
dialog.CancelClick += new EventHandler(dialog_CancelClick);
}
thread = new Thread(new ThreadStart(BackgroundCallback));
this.Progress = 0;
if (setStartPos)
{
dialog.Location = new Point(StartPos.X - (dialog.Width / 2), StartPos.Y);;
dialog.StartPosition = FormStartPosition.Manual;
}
else
{
dialog.StartPosition = FormStartPosition.CenterParent;
}
dr = dialog.ShowDialog(owner);
dialog.Load -= leh;
if (cancellable)
{
this.cancelled = dialog.Cancelled;
dialog.CancelClick -= new EventHandler(dialog_CancelClick);
}
if (exception != null)
{
throw new WorkerThreadException("Worker thread threw an exception", exception);
}
}
return dr;
}
