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fix watchTree silent crash #12975

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merged 7 commits into from
Jun 13, 2022
Merged

fix watchTree silent crash #12975

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6ea8815
fix watchTree silent crash
pinzart Jun 7, 2022
d8d3402
Update WatchTree.xaml.cs
pinzart Jun 7, 2022
f49b66a
add test
pinzart Jun 8, 2022
56729bb
Update DynamoViewTests.cs
pinzart Jun 9, 2022
d9570b5
Update DynamoViewTests.cs
pinzart Jun 10, 2022
5d485d1
remove test
pinzart Jun 13, 2022
e7cff2a
Delete BiggestRectangle.dyn
mjkkirschner Jun 13, 2022
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5 changes: 1 addition & 4 deletions src/DynamoCoreWpf/Views/Preview/PreviewControl.xaml.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -393,10 +393,7 @@ private void RefreshExpandedDisplay(Action refreshDisplay)

if (largeContentGrid.Children.Count == 0)
{
var tree = new WatchTree
{
DataContext = new WatchViewModel(nodeViewModel.DynamoViewModel.BackgroundPreviewViewModel.AddLabelForPath)
};
var tree = new WatchTree(new WatchViewModel(nodeViewModel.DynamoViewModel.BackgroundPreviewViewModel.AddLabelForPath));
tree.treeView1.ItemContainerGenerator.StatusChanged += WatchContainer_StatusChanged;
largeContentGrid.Children.Add(tree);
}
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9 changes: 6 additions & 3 deletions src/DynamoCoreWpf/Views/Preview/WatchTree.xaml.cs
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Expand Up @@ -22,9 +22,13 @@ public partial class WatchTree : UserControl
private readonly int minWidthSize = 100;
private readonly int minHeightSize = 38;

public WatchTree()
public WatchTree(WatchViewModel vm)
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this should be ok to break right ?

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yes

{
_vm = vm;

InitializeComponent();

DataContext = vm;
this.Loaded += WatchTree_Loaded;
this.Unloaded += WatchTree_Unloaded;
}
Expand All @@ -42,8 +46,7 @@ private void WatchTree_Unloaded(object sender, RoutedEventArgs e)

void WatchTree_Loaded(object sender, RoutedEventArgs e)
{
_vm = this.DataContext as WatchViewModel;
_vm.PropertyChanged += _vm_PropertyChanged;
_vm.PropertyChanged += _vm_PropertyChanged;
}

private void _vm_PropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
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11 changes: 4 additions & 7 deletions src/Libraries/CoreNodeModelsWpf/NodeViewCustomizations/Watch.cs
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Expand Up @@ -39,15 +39,15 @@ public void CustomizeView(Watch nodeModel, NodeView nodeView)
this.watch = nodeModel;
this.syncContext = new DispatcherSynchronizationContext(nodeView.Dispatcher);

var watchTree = new WatchTree();
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Is any of this code new to 2.15 that causes this to fail only in 2.15?

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Hard to tell by looking at the code...multiple things can contribute to this bug
The critical area (IMO) is the Loaded event ...that assumes a DataContext exists. That part of the code has been there for a while.

The loaded event can be triggered multiple times with/without data context. Looks like at least in 2.15...a Loaded event is triggered without data context (when opening the .dyn attached to the jira task)
This seems to be acceptable (from what I have read) but we should not always assume the context exists.

// make empty watchViewModel
rootWatchViewModel = new WatchViewModel(dynamoViewModel.BackgroundPreviewViewModel.AddLabelForPath);

var watchTree = new WatchTree(rootWatchViewModel);
watchTree.BorderThickness = new Thickness(1, 1, 1, 1);
watchTree.BorderBrush = new SolidColorBrush(Color.FromRgb(220,220,220));

watchTree.SetWatchNodeProperties();

// make empty watchViewModel
rootWatchViewModel = new WatchViewModel(dynamoViewModel.BackgroundPreviewViewModel.AddLabelForPath);

nodeView.PresentationGrid.Children.Add(watchTree);
nodeView.PresentationGrid.Visibility = Visibility.Visible;
// disable preview control
Expand All @@ -61,9 +61,6 @@ public void CustomizeView(Watch nodeModel, NodeView nodeView)

private void Bind(WatchTree watchTree, NodeView nodeView)
{
// The WatchTree Control is bound to the WatchViewModel
watchTree.DataContext = rootWatchViewModel;

// Add binding for TreeView
var sourceBinding = new Binding("Children")
{
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