private Rect GetCalculatedSize(ElementTreeItemViewModel viewModel, double y)
{
Rect rect = new Rect();
if (viewModel != null)
{
int leafElementCount = viewModel.LeafElementCount;
double pitch = _theme.MatrixCellSize + 2.0;
if (viewModel.IsExpanded)
{
double x = viewModel.Depth * 26.0;
double width = pitch;
if (width > ActualWidth)
{
width = ActualWidth;
}
double height = leafElementCount * pitch;
rect = new Rect(x, y, width, height);
}
else
{
double x = viewModel.Depth * 26.0;
double width = ActualWidth - x + 1.0;
if (width < 0)
{
width = 0;
}
double height = pitch;
rect = new Rect(x, y, width, height);
}
}
return(rect);
}
private void OnDataContextChanged(object sender, DependencyPropertyChangedEventArgs e)
{
_viewModel = e.NewValue as ElementTreeItemViewModel;
if (_viewModel != null)
{
ToolTip = _viewModel.Description;
}
}
private void OnMouseMove(object sender, MouseEventArgs e)
{
ElementTreeItemViewModel elementViewModel = GetElementViewModel(e.Source);
if (elementViewModel != null)
{
_matrixViewModel?.HoverTreeItem(elementViewModel);
}
}
private void CreateChildViews(ElementTreeItemViewModel elementViewModel, double y)
{
foreach (ElementTreeItemViewModel child in elementViewModel.Children)
{
Rect rect = GetCalculatedSize(child, y);
MatrixRowHeaderItemView elementView = new MatrixRowHeaderItemView(_matrixViewModel, _theme)
{
Height = rect.Height,
Width = rect.Width
};
SetTop(elementView, rect.Top);
SetLeft(elementView, rect.Left);
elementView.DataContext = child;
Children.Add(elementView);
CreateChildViews(child, y);
y += rect.Height;
}
}
private void OnMouseDown(object sender, MouseButtonEventArgs e)
{
MatrixRowHeaderItemView headerItemView = e.Source as MatrixRowHeaderItemView;
if (headerItemView != null)
{
Point pt = e.GetPosition(headerItemView);
if ((pt.X < 20) && (pt.Y < 24))
{
_matrixViewModel.ToggleElementExpandedCommand.Execute(null);
InvalidateVisual();
}
}
ElementTreeItemViewModel elementViewModel = GetElementViewModel(e.Source);
if (elementViewModel != null)
{
_matrixViewModel?.SelectTreeItem(elementViewModel);
}
}
