private async void Window_Closing(object sender, System.ComponentModel.CancelEventArgs e)
{
if (m_ShouldClose == null)
{
// Double call DialogHost.Show() throw exceptions
// For example - rename sheet and close application.
if (m_VM != null && m_VM.DlgHost != null && m_VM.DlgHost.IsOpen)
{
e.Cancel = true;
return;
}
// mark comment to m_ShouldClose
e.Cancel = true;
// is here unsaved documents?
bool bUnsaved = false;
if (m_VM != null && m_VM.CurrentDocument != null)
{
if (m_VM.CurrentDocument.HasChanges)
{
bUnsaved = true;
}
}
//
if (bUnsaved)
{
SaveChangesDialog_ViewModel vm = new SaveChangesDialog_ViewModel();
vm.Text = "This document is unsaved and contains some changes. Some data will be lost possibly.";
vm.IsSaveButtonVisible = false;
SaveChangesDialog saveChangesDialog = new SaveChangesDialog(vm);
//show the dialog
// true - save
// false - cancel
// null - continue
var result = await DialogHost.Show(saveChangesDialog);
if (result is bool && !(bool)result)
{
return;
}
}
m_ShouldClose = true;
Application.Current.Shutdown();
}
}
//=============================================================================
private Task <object> OnBeforeAppShutdown()
{
if (m_CurrentDocument == null)
{
return(null);
}
// Ask for save before app close.
if (m_CurrentDocument.HasChanges)
{
// undo all not completed changes
m_CurrentDocument.SetTheLastState();
SaveChangesDialog_ViewModel saveChangesDialogVM = new SaveChangesDialog_ViewModel();
saveChangesDialogVM.Text = "Application session is limited by 24 hours. Application will be closed. Do you want to save changes?";
saveChangesDialogVM.IsSaveButtonVisible = true;
saveChangesDialogVM.IsCancelButtonVisible = false;
SaveChangesDialog saveChangesDialog = new SaveChangesDialog(saveChangesDialogVM);
// Close previous dialog.
if (DlgHost != null && DlgHost.IsOpen)
{
DlgHost.IsOpen = false;
}
return(DialogHost.Show(saveChangesDialog).ContinueWith <object>((previousTask) =>
{
var prevTaskResult = previousTask.Result;
// true - save
// false - cancel
// null - continue
if (prevTaskResult is bool && (bool)prevTaskResult)
{
// save the document
string strFilePath = string.Empty;
if (m_CurrentDocument.IsItNewDocument || m_CurrentDocument.NameWithoutExtension != m_CurrentDocument.CustomerENQ)
{
string strOldPath = null;
if (!m_CurrentDocument.IsItNewDocument && !string.IsNullOrEmpty(m_CurrentDocument.Path))
{
strOldPath = m_CurrentDocument.Path;
}
strFilePath = FileUtils._SaveFileDialog(DrawingDocument.FILE_FILTER, DrawingDocument.FILE_EXTENSION, m_CurrentDocument.CustomerENQ, m_CurrentDocument.CustomerENQ, strOldPath);
if (string.IsNullOrEmpty(strFilePath))
{
return null;
}
}
// Try to save in UI thread, otherwise DrawingDocument.Save throws an exception on DrawingControl.Update() method which updates UI.
if (DrawingControl != null)
{
DrawingControl.Dispatcher.Invoke(new Action(() =>
{
m_CurrentDocument.Save(strFilePath);
}
));
return true;
}
else
{
return m_CurrentDocument.Save(strFilePath);
}
}
return null;
}));
}
else
{
return(this.DisplayMessageDialog("Application session is limited by 24 hours. Application will be closed."));
}
return(null);
}
//=============================================================================
public async Task <bool> OpenDrawing(string strDrawingPath)
{
DrawingDocument.ClearErrors();
if (string.IsNullOrEmpty(strDrawingPath))
{
return(false);
}
if (!File.Exists(strDrawingPath))
{
await this.DisplayMessageDialog("Cant open document \"" + strDrawingPath + "\". File doesnt exist.");
return(false);
}
//
bool bIsNewDocOpened = false;
try
{
FileStream fs = new FileStream(strDrawingPath, FileMode.Open);
if (fs != null)
{
BinaryFormatter bf = new BinaryFormatter();
DrawingDocument doc = (DrawingDocument)bf.Deserialize(fs);
doc.DisplayDialog = this;
doc.Path = strDrawingPath;
// save old document if new document is not correct and user dont want to fix it
DrawingDocument oldDoc = this.CurrentDocument;
//
this.CurrentDocument = doc;
bool bCorrect = await doc.CheckDocument(true, false);
// if opened document is not correct then set old document
if (!bCorrect)
{
this.CurrentDocument = oldDoc;
}
else
{
doc.MarkStateChanged();
doc.RemoveAllStatesExceptCurrent();
bIsNewDocOpened = true;
// Clear changed sheets guids.
DrawingSheet.m_ChangedSheetsGuidsSet.Clear();
}
//
fs.Close();
fs.Dispose();
}
}
catch { }
//
if (DrawingDocument._sDontSupportDocument)
{
// open document which is not supported
SaveChangesDialog_ViewModel saveChanges_VM = new SaveChangesDialog_ViewModel();
saveChanges_VM.Text = "This document has very old version, its not supported. Save this document in this application possibly lead to data loss.";
saveChanges_VM.IsSaveButtonVisible = false;
saveChanges_VM.IsCancelButtonVisible = false;
SaveChangesDialog saveChangesDialog = new SaveChangesDialog(saveChanges_VM);
//show the dialog
// true - save
// false - cancel
// null - continue
var result = await DialogHost.Show(saveChangesDialog);
}
else if (DrawingDocument._sBiggerMajorNumber > 0)
{
await this.DisplayMessageDialog("An error occurred while opening document. Document was created in the new version of the application and doesnt supported in this application version.\nDocument was not opened.");
return(false);
}
else if (DrawingDocument._sNewVersion_StreamRead > 0)
{
// open new document in old version application
SaveChangesDialog_ViewModel saveChanges_VM = new SaveChangesDialog_ViewModel();
saveChanges_VM.Text = "This document was created\\saved in the new version of application. It can be drawn or working incorrect. Save this document in this application possibly lead to data loss.";
saveChanges_VM.IsSaveButtonVisible = false;
saveChanges_VM.IsCancelButtonVisible = false;
SaveChangesDialog saveChangesDialog = new SaveChangesDialog(saveChanges_VM);
//show the dialog
// true - save
// false - cancel
// null - continue
var result = await DialogHost.Show(saveChangesDialog);
}
else if (DrawingDocument._sStreamReadException > 0)
{
//
SaveChangesDialog_ViewModel saveChanges_VM = new SaveChangesDialog_ViewModel();
saveChanges_VM.Text = "Exceptions ocurred while open document. It can be drawn or working incorrect. Save this document in this application possibly lead to data loss.";
saveChanges_VM.IsSaveButtonVisible = false;
saveChanges_VM.IsCancelButtonVisible = false;
SaveChangesDialog saveChangesDialog = new SaveChangesDialog(saveChanges_VM);
//show the dialog
// true - save
// false - cancel
// null - continue
var result = await DialogHost.Show(saveChangesDialog);
}
else
{
if (bIsNewDocOpened && this.CurrentDocument != null)
{
// ENQ number is neccessaru for any kind of export.
// Display the message if it is empty.
if (string.IsNullOrEmpty(this.CurrentDocument.CustomerENQ))
{
await this.DisplayMessageDialog("ENQ number is neccessary for any kind of export. Please go to the Customer Info and input ENQ number.");
}
else
{
// Check that ENQ number can be used as a filename for the text file.
if (this.CurrentDocument.CustomerENQ.IndexOfAny(Path.GetInvalidFileNameChars()) >= 0)
{
await this.DisplayMessageDialog("ENQ number contains incorrect characters for the filename. Please go to the Customer Info and edit ENQ number.");
}
else if (this.CurrentDocument.NameWithoutExtension != this.CurrentDocument.CustomerENQ)
{
await this.DisplayMessageDialog("ENQ number is different from the document name. Please use ENQ number as a document name.");
}
}
return(true);
}
}
return(false);
}
//=============================================================================
private async void CloseSheettButton_Click(object sender, RoutedEventArgs e)
{
if (m_VM == null || m_VM.CurrentDocument == null)
{
return;
}
if (m_VM.CurrentDocument.Sheets.Count == 1)
{
return;
}
Button btn = sender as Button;
if (btn == null)
{
return;
}
ListBoxItem lbi = Utils.TryFindParent <ListBoxItem>(btn);
if (lbi == null)
{
return;
}
DrawingSheet sheetToClose = lbi.DataContext as DrawingSheet;
if (sheetToClose == null)
{
return;
}
if (sheetToClose.Rectangles.Count > 0)
{
StringBuilder sb = new StringBuilder();
sb.Append("Sheet \"");
sb.Append(sheetToClose.DisplayName);
sb.Append("\" has geometry inside. Do you want to close it? All geometry inside will be deleted with the sheet.");
SaveChangesDialog_ViewModel vm = new SaveChangesDialog_ViewModel();
vm.Text = sb.ToString();
vm.IsSaveButtonVisible = false;
SaveChangesDialog saveChangesDialog = new SaveChangesDialog(vm);
//show the dialog
// true - save
// false - cancel
// null - continue
var result = await DialogHost.Show(saveChangesDialog);
if (result is bool)
{
bool bRes = (bool)result;
// cancel - dont close document
if (!bRes)
{
return;
}
}
}
// select document
m_VM.CurrentDocument.RemoveSheet(sheetToClose);
m_VM.CurrentDocument.MarkStateChanged();
}