void MainWindow_PreviewMouseMove(object sender, MouseEventArgs e)
{
FrameworkElement host;
lock (_dragLock)
{
if (_isDragging)
{
return;
}
var position = e.GetPosition(null);
if (Math.Abs(position.X - _startPoint.X) <= SystemParameters.MinimumHorizontalDragDistance &&
Math.Abs(position.Y - _startPoint.Y) <= SystemParameters.MinimumVerticalDragDistance)
{
return;
}
host = AppSettings.Default.View == ViewMode.TreeFull
? FlatDocView.FindAncestor <TreeViewItem>((DependencyObject)e.OriginalSource)
: (FrameworkElement)FlatDocView.FindAncestor <Border>((DependencyObject)e.OriginalSource);
if (host == null || host.DataContext == null || host.DataContext is PackageViewModel || !(host.DataContext is IItemViewModel))
{
return;
}
if (AppSettings.Default.View == ViewMode.Flat && (host.DataContext is RoundViewModel || host.DataContext is ThemeViewModel))
{
return;
}
if (DataContext == null)
{
return;
}
_isDragging = true;
}
var active = (QDocument)DataContext;
var item = ((IItemViewModel)host.DataContext).GetModel();
InfoOwnerData itemData = null;
try
{
itemData = new InfoOwnerData(item);
FlatDocView.DoDrag(host, active, item, itemData);
}
catch (OutOfMemoryException)
{
MessageBox.Show("Ошибка копирования данных: слишком большой объём", App.ProductName, MessageBoxButton.OK, MessageBoxImage.Exclamation);
}
catch (InvalidOperationException)
{
}
catch (Exception exc)
{
MessageBox.Show(string.Format("Ошибка копирования данных: {0}", exc.Message), App.ProductName, MessageBoxButton.OK, MessageBoxImage.Exclamation);
}
finally
{
lock (_dragLock)
{
_isDragging = false;
}
e.Handled = true;
PreviewMouseMove -= MainWindow_PreviewMouseMove;
PreviewMouseLeftButtonUp -= DocumentView_PreviewMouseLeftButtonUp;
itemData?.Dispose();
}
}
private async void Main_Drop(object sender, DragEventArgs e)
{
e.Handled = true;
if (e.Data.GetDataPresent("FileName"))
{
var files = e.Data.GetData("FileName") as string[];
foreach (var file in files)
{
var longPath = new StringBuilder(255);
GetLongPathName(file, longPath, longPath.Capacity);
var longPathString = longPath.ToString();
if (Path.GetExtension(longPathString) == ".txt")
{
((MainViewModel)Application.Current.MainWindow.DataContext).ImportTxt.Execute(longPathString);
}
else
{
ApplicationCommands.Open.Execute(longPathString, this);
}
}
e.Effects = e.AllowedEffects;
return;
}
if (e.Data.GetDataPresent("FileContents"))
{
using (var contentStream = e.Data.GetData("FileContents") as MemoryStream)
{
((MainViewModel)Application.Current.MainWindow.DataContext).ImportTxt.Execute(contentStream);
}
e.Effects = e.AllowedEffects;
return;
}
var treeViewItem = FlatDocView.FindAncestor <TreeViewItem>((DependencyObject)e.OriginalSource);
if (treeViewItem == null)
{
e.Effects = DragDropEffects.None;
return;
}
var format = FlatDocView.GetDragFormat(e);
InfoOwnerData dragData = null;
try
{
dragData = (InfoOwnerData)e.Data.GetData(typeof(InfoOwnerData));
}
catch (SerializationException)
{
return;
}
var dataContext = ((IItemViewModel)treeViewItem.DataContext).GetModel();
if (dataContext == null || dataContext.GetType().ToString() == format && Equals(dataContext, dragData.ItemData))
{
e.Effects = DragDropEffects.None;
return;
}
var document = ((QDocument)DataContext).Document;
e.Effects = DragDropEffects.Move;
try
{
if (format == "siqround")
{
Round round = null;
if (dragData != null)
{
round = (Round)dragData.GetItem();
}
else
{
var value = e.Data.GetData(DataFormats.Serializable).ToString();
using (var stringReader = new StringReader(value))
using (var reader = XmlReader.Create(stringReader))
{
round = new Round();
round.ReadXml(reader);
}
}
if (treeViewItem.DataContext is PackageViewModel)
{
var package = treeViewItem.DataContext as PackageViewModel;
package.Rounds.Add(new RoundViewModel(round));
await dragData.ApplyData(document);
}
else if (treeViewItem.DataContext is RoundViewModel)
{
var docRound = treeViewItem.DataContext as RoundViewModel;
docRound.OwnerPackage.Rounds.Insert(docRound.OwnerPackage.Rounds.IndexOf(docRound), new RoundViewModel(round));
await dragData.ApplyData(document);
}
}
else if (format == "siqtheme")
{
Theme theme = null;
if (dragData != null)
{
theme = (Theme)dragData.GetItem();
}
else
{
var value = e.Data.GetData(DataFormats.Serializable).ToString();
using (var stringReader = new StringReader(value))
using (var reader = XmlReader.Create(stringReader))
{
theme = new Theme();
theme.ReadXml(reader);
}
}
if (treeViewItem.DataContext is RoundViewModel)
{
var docRound = treeViewItem.DataContext as RoundViewModel;
docRound.Themes.Add(new ThemeViewModel(theme));
await dragData.ApplyData(document);
}
else if (treeViewItem.DataContext is ThemeViewModel)
{
var docTheme = treeViewItem.DataContext as ThemeViewModel;
docTheme.OwnerRound.Themes.Insert(docTheme.OwnerRound.Themes.IndexOf(docTheme), new ThemeViewModel(theme));
await dragData.ApplyData(document);
}
}
else if (format == "siqquestion")
{
Question question = null;
if (dragData != null)
{
question = (Question)dragData.GetItem();
}
else
{
var value = e.Data.GetData(DataFormats.Serializable).ToString();
using (var stringReader = new StringReader(value))
using (var reader = XmlReader.Create(stringReader))
{
question = new Question();
question.ReadXml(reader);
}
}
if (treeViewItem.DataContext is ThemeViewModel)
{
var docTheme = treeViewItem.DataContext as ThemeViewModel;
if (docTheme.Questions.Any(questionViewModel => questionViewModel.Model == question))
{
question = question.Clone();
}
docTheme.Questions.Add(new QuestionViewModel(question));
if (AppSettings.Default.ChangePriceOnMove)
{
FlatDocView.RecountPrices(docTheme);
}
await dragData.ApplyData(document);
}
else if (treeViewItem.DataContext is QuestionViewModel)
{
var docQuestion = treeViewItem.DataContext as QuestionViewModel;
if (docQuestion.OwnerTheme.Questions.Any(questionViewModel => questionViewModel.Model == question))
{
question = question.Clone();
}
int pos = docQuestion.OwnerTheme.Questions.IndexOf(docQuestion);
docQuestion.OwnerTheme.Questions.Insert(pos, new QuestionViewModel(question));
if (AppSettings.Default.ChangePriceOnMove)
{
FlatDocView.RecountPrices(docQuestion.OwnerTheme);
}
await dragData.ApplyData(document);
}
}
else
{
e.Effects = DragDropEffects.None;
}
}
finally
{
if (dragData != null)
{
dragData.Dispose();
}
}
}
internal static void DoDrag(FrameworkElement host, QDocument active, InfoOwner item, InfoOwnerData itemData, Action beforeDrag = null, Action afterDrag = null)
{
if (host == null)
{
throw new ArgumentNullException(nameof(host));
}
if (active == null)
{
throw new ArgumentNullException(nameof(active));
}
if (item == null)
{
throw new ArgumentNullException(nameof(item));
}
if (itemData == null)
{
throw new ArgumentNullException(nameof(itemData));
}
itemData.GetFullData(active.Document, item);
var dataObject = new DataObject(itemData);
if (host.DataContext is RoundViewModel roundViewModel)
{
var packageViewModel = roundViewModel.OwnerPackage;
if (packageViewModel == null)
{
throw new ArgumentException(nameof(packageViewModel));
}
int index = packageViewModel.Rounds.IndexOf(roundViewModel);
active.BeginChange();
try
{
var sb = new StringBuilder();
using (var writer = XmlWriter.Create(sb))
{
roundViewModel.Model.WriteXml(writer);
}
dataObject.SetData("siqround", "1");
dataObject.SetData(DataFormats.Serializable, sb);
var result = DragDrop.DoDragDrop(host, dataObject, DragDropEffects.Move);
if (result == DragDropEffects.Move)
{
if (packageViewModel.Rounds[index] != roundViewModel)
{
index++;
}
packageViewModel.Rounds.RemoveAt(index);
active.CommitChange();
}
else
{
active.RollbackChange();
}
}
catch (Exception exc)
{
active.RollbackChange();
throw exc;
}
}
else
{
if (host.DataContext is ThemeViewModel themeViewModel)
{
roundViewModel = themeViewModel.OwnerRound;
if (roundViewModel == null)
{
throw new ArgumentException(nameof(roundViewModel));
}
int index = roundViewModel.Themes.IndexOf(themeViewModel);
active.BeginChange();
try
{
var sb = new StringBuilder();
using (var writer = XmlWriter.Create(sb))
{
themeViewModel.Model.WriteXml(writer);
}
dataObject.SetData("siqtheme", "1");
dataObject.SetData(DataFormats.Serializable, sb);
var result = DragDrop.DoDragDrop(host, dataObject, DragDropEffects.Move);
if (result == DragDropEffects.Move)
{
if (roundViewModel.Themes[index] != themeViewModel)
{
index++;
}
roundViewModel.Themes.RemoveAt(index);
}
active.CommitChange();
}
catch (Exception exc)
{
active.RollbackChange();
throw exc;
}
}
else
{
var questionViewModel = host.DataContext as QuestionViewModel;
themeViewModel = questionViewModel.OwnerTheme;
if (themeViewModel == null)
{
throw new ArgumentException(nameof(themeViewModel));
}
var index = themeViewModel.Questions.IndexOf(questionViewModel);
active.BeginChange();
try
{
var sb = new StringBuilder();
using (var writer = XmlWriter.Create(sb))
{
questionViewModel.Model.WriteXml(writer);
}
dataObject.SetData("siqquestion", "1");
dataObject.SetData(DataFormats.Serializable, sb);
beforeDrag?.Invoke();
DragDropEffects result;
try
{
result = DragDrop.DoDragDrop(host, dataObject, DragDropEffects.Move);
}
catch (InvalidOperationException)
{
result = DragDropEffects.None;
}
finally
{
host.Opacity = 1.0;
afterDrag?.Invoke();
}
if (result == DragDropEffects.Move)
{
if (themeViewModel.Questions[index] != questionViewModel)
{
index++;
}
themeViewModel.Questions.RemoveAt(index);
if (AppSettings.Default.ChangePriceOnMove)
{
RecountPrices(themeViewModel);
}
}
active.CommitChange();
}
catch (Exception exc)
{
active.RollbackChange();
throw exc;
}
}
}
}
private async void Main_Drop(object sender, DragEventArgs e)
{
e.Handled = true;
line.Visibility = Visibility.Hidden;
if (e.Data.GetDataPresent("FileName"))
{
var files = e.Data.GetData("FileName") as string[];
foreach (var file in files)
{
var longPath = new StringBuilder(255);
GetLongPathName(file, longPath, longPath.Capacity);
var longPathString = longPath.ToString();
if (Path.GetExtension(longPathString) == ".txt")
{
((MainViewModel)Application.Current.MainWindow.DataContext).ImportTxt.Execute(longPathString);
}
else
{
ApplicationCommands.Open.Execute(longPathString, this);
}
}
e.Effects = e.AllowedEffects;
return;
}
if (e.Data.GetDataPresent("FileContents"))
{
using (var contentStream = e.Data.GetData("FileContents") as MemoryStream)
{
((MainViewModel)Application.Current.MainWindow.DataContext).ImportTxt.Execute(contentStream);
}
e.Effects = e.AllowedEffects;
return;
}
var format = GetDragFormat(e);
InfoOwnerData dragData = null;
try
{
dragData = (InfoOwnerData)e.Data.GetData(typeof(InfoOwnerData));
}
catch (SerializationException)
{
return;
}
e.Effects = DragDropEffects.Move;
try
{
if (format == "siqquestion" && _insertionPosition != null)
{
Question question = null;
if (dragData != null)
{
question = (Question)dragData.GetItem();
}
else
{
var value = e.Data.GetData(DataFormats.Serializable).ToString();
using (var stringReader = new StringReader(value))
using (var reader = XmlReader.Create(stringReader))
{
question = new Question();
question.ReadXml(reader);
}
}
var themeViewModel = _insertionPosition.Item1;
var index = _insertionPosition.Item2;
if (themeViewModel.Questions.Any(questionViewModel => questionViewModel.Model == question))
{
question = question.Clone();
}
var questionViewModelNew = new QuestionViewModel(question);
themeViewModel.Questions.Insert(index, questionViewModelNew);
if (AppSettings.Default.ChangePriceOnMove)
{
RecountPrices(themeViewModel);
}
var document = (QDocument)DataContext;
await dragData.ApplyData(document.Document);
document.Navigate.Execute(questionViewModelNew);
}
else
{
e.Effects = DragDropEffects.None;
}
}
finally
{
if (dragData != null)
{
dragData.Dispose();
}
}
}
void MainWindow_PreviewMouseMove(object sender, MouseEventArgs e)
{
FrameworkElement host;
if (AppSettings.Default.FlatScale != FlatScale.Theme)
{
return;
}
lock (_dragLock)
{
if (_isDragging || _startPoint.X == -1)
{
return;
}
var position = e.GetPosition(null);
if (Math.Abs(position.X - _startPoint.X) <= 5 * SystemParameters.MinimumHorizontalDragDistance &&
Math.Abs(position.Y - _startPoint.Y) <= 5 * SystemParameters.MinimumVerticalDragDistance)
{
return;
}
if (AppSettings.Default.View == ViewMode.TreeFull)
{
host = FindAncestor <TreeViewItem>((DependencyObject)e.OriginalSource);
}
else
{
host = FindAncestor <Border>((DependencyObject)e.OriginalSource);
}
if (host == null || host.DataContext == null || host.DataContext is PackageViewModel || !(host.DataContext is IItemViewModel))
{
return;
}
if (AppSettings.Default.View == ViewMode.Flat && (host.DataContext is RoundViewModel || host.DataContext is ThemeViewModel))
{
return;
}
if (DataContext == null)
{
return;
}
_isDragging = true;
}
var active = (QDocument)DataContext;
var item = ((IItemViewModel)host.DataContext).GetModel();
InfoOwnerData itemData = null;
try
{
itemData = new InfoOwnerData(item);
DoDrag(host, active, item, itemData, () =>
{
var rtb = new RenderTargetBitmap((int)host.ActualWidth, (int)host.ActualHeight, 96, 96, PixelFormats.Pbgra32);
rtb.Render(host);
host.Opacity = 0.5;
dragImage.Width = host.ActualWidth;
dragImage.Height = host.ActualHeight;
dragImage.Source = rtb;
dragImage.Visibility = Visibility.Visible;
}, () =>
{
dragImage.Source = null;
});
}
catch (OutOfMemoryException)
{
MessageBox.Show("Ошибка копирования данных: слишком большой объём", App.ProductName, MessageBoxButton.OK, MessageBoxImage.Exclamation);
}
catch (InvalidOperationException)
{
}
finally
{
lock (_dragLock)
{
_isDragging = false;
}
e.Handled = true;
PreviewMouseMove -= MainWindow_PreviewMouseMove;
if (itemData != null)
{
itemData.Dispose();
}
}
}
