void StartLoadMenu(RowData rowData)
{
if (menus[0].IsUsable &&
loadingRowData != rowData &&
(menus[rowData.MenuLevel + 1] == null ||
menus[rowData.MenuLevel + 1].Tag as RowData != rowData))
{
loadingRowData = rowData;
LoadStarted();
BackgroundWorker workerSubMenu = workersSubMenu.
Where(w => !w.IsBusy).FirstOrDefault();
if (workerSubMenu == null)
{
workerSubMenu = new BackgroundWorker
{
WorkerSupportsCancellation = true,
};
workerSubMenu.DoWork += LoadMenu;
workerSubMenu.RunWorkerCompleted += LoadSubMenuCompleted;
workersSubMenu.Add(workerSubMenu);
}
workerSubMenu.RunWorkerAsync(rowData);
}
void LoadSubMenuCompleted(object senderCompleted, RunWorkerCompletedEventArgs e)
{
LoadStopped();
MenuData menuData = (MenuData)e.Result;
if (menus[0].IsUsable &&
menuData.Validity != MenuDataValidity.AbortedOrUnknown)
{
Menu menu = Create(menuData);
switch (menuData.Validity)
{
case MenuDataValidity.Valid:
menu.SetTypeSub();
break;
case MenuDataValidity.Empty:
menu.SetTypeEmpty();
break;
case MenuDataValidity.NoAccess:
menu.SetTypeNoAccess();
break;
}
menu.Tag = menuData.RowDataParent;
menuData.RowDataParent.SubMenu = menu;
if (menus[0].IsUsable)
{
ShowSubMenu(menu);
}
}
loadingRowData = null;
}
}
private void CreateMenuRow(RowData rowData, Menu menu, DataTable dataTable)
{
rowData.SetData(rowData, dataTable);
rowData.OpenMenu += OpenSubMenu;
rowData.Reading.WorkerSupportsCancellation = true;
rowData.Reading.DoWork += ReadMenu_DoWork;
void ReadMenu_DoWork(object senderDoWork,
DoWorkEventArgs eDoWork)
{
int level = (int)eDoWork.Argument;
BackgroundWorker worker = (BackgroundWorker)senderDoWork;
eDoWork.Result = Business.Menus.GetData(worker, rowData.TargetFilePath, level);
}
rowData.Reading.RunWorkerCompleted += ReadMenu_RunWorkerCompleted;
void ReadMenu_RunWorkerCompleted(object senderCompleted,
RunWorkerCompletedEventArgs e)
{
MenuData menuData = (MenuData)e.Result;
if (rowData.RestartLoading)
{
rowData.RestartLoading = false;
rowData.Reading.RunWorkerAsync(menuData.Level);
}
else
{
LoadStopped();
if (menuData.Validity != MenuDataValidity.Invalid)
{
menu = Create(menuData);
if (menuData.RowDatas.Count > 0)
{
menu.SetTypeSub();
}
else if (menuData.Validity == MenuDataValidity.NoAccess)
{
menu.SetTypeNoAccess();
}
else
{
menu.SetTypeEmpty();
}
menu.Tag = rowData;
rowData.SubMenu = menu;
rowData.MenuLoaded();
}
}
}
}