private void mnuTasks_Opening(object sender, System.ComponentModel.CancelEventArgs e)
{
if (this.lvwTasks.SelectedItems.Count > 0)
{
ListViewItem item = this.lvwTasks.SelectedItems[0];
Object tag = item.Tag;
if (tag != null)
{
if (tag is QueryTask)
{
QueryTask qTask = (QueryTask)tag;
this.mnuViewErrors.Enabled = qTask.Error != null;
this.mnuViewResults.Enabled = (qTask.State == TaskState.Completed && qTask.Result != null);
this.mnuCancel.Enabled = qTask.IsCancellable;
}
else if (tag is BaseImportTask)
{
BaseImportTask importTask = (BaseImportTask)tag;
this.mnuViewErrors.Enabled = importTask.Error != null;
this.mnuViewResults.Enabled = false;
this.mnuCancel.Enabled = importTask.IsCancellable;
}
else if (tag is ListGraphsTask)
{
ListGraphsTask graphsTask = (ListGraphsTask)tag;
this.mnuViewErrors.Enabled = graphsTask.Error != null;
this.mnuViewResults.Enabled = false;
this.mnuCancel.Enabled = graphsTask.IsCancellable;
}
else if (tag is CountTriplesTask)
{
CountTriplesTask countTask = (CountTriplesTask)tag;
this.mnuViewErrors.Enabled = countTask.Error != null;
this.mnuViewResults.Enabled = false;
this.mnuCancel.Enabled = countTask.IsCancellable;
}
else if (tag is ITask <IGraph> )
{
ITask <IGraph> graphTask = (ITask <IGraph>)tag;
this.mnuViewErrors.Enabled = graphTask.Error != null;
this.mnuViewResults.Enabled = (graphTask.State == TaskState.Completed && graphTask.Result != null);
this.mnuCancel.Enabled = graphTask.IsCancellable;
}
else if (tag is ITask <TaskResult> )
{
ITask <TaskResult> basicTask = (ITask <TaskResult>)tag;
this.mnuViewErrors.Enabled = basicTask.Error != null;
this.mnuViewResults.Enabled = false;
this.mnuCancel.Enabled = basicTask.IsCancellable;
}
else
{
e.Cancel = true;
}
}
else
{
e.Cancel = true;
}
}
else
{
e.Cancel = true;
}
}
private void CountTriples(String graphUri)
{
CountTriplesTask task = new CountTriplesTask(this._manager, graphUri);
this.AddTask <TaskValueResult <int> >(task, this.CountTriplesCallback);
}