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Closed Unassigned: [Version 2.0] NullReference and double floating windows [16204]

emartin — Tue, 21 May 2013 14:34:47 GMT

Hi,

having two issues while using floating windows. The second issue gives me this exception:

bei AvalonDock.Controls.LayoutAnchorableFloatingWindowControl.OnClosed(EventArgs e) in C:\Users\adospace\Documents\Visual Studio 2010\Projects\AvalonDock\AvalonDock\Controls\LayoutAnchorableFloatingWindowControl.cs:Zeile 223.

bei System.Windows.Window.WmDestroy()

bei System.Windows.Window.WindowFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)

bei System.Windows.Interop.HwndSource.PublicHooksFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)

bei MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)

bei MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)

bei System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)

bei MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)

Steps reproduce:
- Having multiple LayoutAnchorablItems
- Drag out one of the anchorables to a floating window
- save the layout and close the application
- open the application and load the layout
- Issue 1: the floating window now exists two times. One window with the correct view inside. The other one without a view. DataContext/ViewModels seem to set all right because the Window title is showing correctly
- Issue 2: If one now tries to drag one of the floating windows back into the main window. One will get the Exception mentioned earlier.

It just happens after restarting the application and reloading a layout.

Following lines showing the load and save of the layout:

```
StringWriter writer = new StringWriter();
XmlLayoutSerializer layoutSerializer = new XmlLayoutSerializer(obj.DockingManager);
layoutSerializer.Serialize(writer);
```

```
if (!string.IsNullOrEmpty(ApplicationContext.Instance.Settings.WindowLayout) && obj.DockingManager != null) {
StringReader reader = new StringReader(ApplicationContext.Instance.Settings.WindowLayout);
XmlLayoutSerializer layoutSerializer = new XmlLayoutSerializer(obj.DockingManager);
layoutSerializer.Deserialize(reader);
}
```
Maybe someone can help me out with this.

Greetings
debgz

Edit 1: Just recognized while playing around. I am not draging the floating window back to the main window but the last anchorable from within the floating window. Seems the floating window then tries to close themself becaus it has no childs.

-=-=-=-=-=-=-=--=-=-=-=-=-=-

Some more Information:

LayoutAnchorableFloatingWindowControl from line 214:

```
protected override void OnClosed(EventArgs e)
{
var root = Model.Root;
root.Manager.RemoveFloatingWindow(this);
root.CollectGarbage();
if (_overlayWindow != null)
{
_overlayWindow.Close();
_overlayWindow = null;
}
```

The model Root is null. hence the exception when calling root.xxx
Question is: Why is Root NULL?

EDIT 1: Just checked the saved layout. there is only a single floating Window. As I am not generating the floating windows by myself the problem seems to be inside avalon.

Commented Unassigned: [Version 2.0] NullReference and double floating windows [16204]

chandramouleswara — Mon, 20 May 2013 01:00:51 GMT

I think this used to happen in a previous version of AD. The latest version does not have this problem.

Thanks
Chandra

Created Unassigned: Datagrid data don't show up [16205]

sreeker — Fri, 17 May 2013 22:44:54 GMT

Hi

I'm using AvalonDock in WPF in .NEt 4.5 VS 2012.

I created mainwindow, with docking properties as below.

<Window x:Class="DiagnosticsClient.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:ADock="clr-namespace:AvalonDock;assembly=AvalonDock"
Title="MainWindow" Height="768" Width="1366">

<Grid> <ADock:DockingManager x:Name="dockManager">
<ADock:ResizingPanel Name="TopLeftPanel" Orientation="Horizontal">
<ADock:ResizingPanel Orientation="Horizontal">
<ADock:DockablePane ADock:ResizingPanel.ResizeWidth="450">
<ADock:DockableContent Name="ScanParameters" Title="Scan Parameters" Width="250">
<ListBox Grid.Row="0">
<ListBoxItem Content="ScanParameters 1"/>
<ListBoxItem Content="ScanParameters 2"/>
<ListBoxItem Content="ScanParameters 3"/>
</ListBox>
</ADock:DockableContent>
<ADock:DockableContent x:Name="classesContent" Title="Modules" Width="450">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="150"/>
<ColumnDefinition Width="300*"/>
</Grid.ColumnDefinitions>
<TreeView Width="160" HorizontalAlignment="Left" Grid.Column="0" x:Name="mainTreeView" SelectedItemChanged="mainTreeView_SelectedItemChanged">
</TreeView>
<DataGrid x:Name="_dataReadBacksGrid" ColumnHeaderHeight="25" AutoGenerateColumns="False" Grid.Column="1" Margin="0" ItemsSource="{Binding ModuleReadbackList}" AlternatingRowBackground="AliceBlue">
<DataGrid.Columns>
<DataGridTextColumn Binding="{Binding Name}" Header="Name" Width="Auto"/>
<DataGridTextColumn Binding="{Binding LastReadValue}" Header="Value" Width="Auto"/>
</DataGrid.Columns>
</DataGrid>
</ADock:ResizingPanel>
</ADock:ResizingPanel>
</ADock:DockingManager>

</Grid>
</Window>

Issues

1. in design time, .xaml shows error as "Object reference not set an instance"

But I compiles fine and executes fine.

2. After loading, when i select treeview item, it shows the data in datagrid. everything works fine.
Now I set the left panel to autohide, bring back data is gone from datagrid, even if i select treeview item again its not showing up.

But when i dock again, shows the data.

I'm really confused, because, event is going through and datagrid has Itemsource items, but its not showing in autohide mode.

any help is more welcome.

thanks

Commented Unassigned: [Version 2.0] NullReference and double floating windows [16204]

emartin — Fri, 17 May 2013 18:26:35 GMT

I've tried to reproduce the issue without success using "AvalonDock.TestApp" application.
* Start the application
* Drag ToolWindow1 out in a floating window
* Menu Layout->Save->Layout1
* Close the application
* Start the application again
* Menu Layout->Load->Layout1

Did not reproduce the problem.
Could you provide a sample app that reproduce it ?

Created Unassigned: [Version 2.0] NullReference and double floating windows [16204]

emartin — Fri, 17 May 2013 18:17:11 GMT

Edited Issue: Cannot resize panes [16194]

emartin — Fri, 17 May 2013 18:03:47 GMT

To reproduce, define the following style for your application.
```
<Application x:Class="WpfApplication1.App"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
StartupUri="MainWindow.xaml">
<Application.Resources>
<Style TargetType="Window" BasedOn="{StaticResource ResourceKey={x:Type Window}}">
<Setter Property="SizeToContent" Value="WidthAndHeight" />
</Style>
</Application.Resources>
</Application>
```
Then try to resize any pane in your application, you will notice that this is not possible.

AvalonDock is using a Window to facilitate resizing of the panes. And due to the defined style, SizeToContent is being applied to all Windows in the application. This messes with the calculations that AvalonDock is doing while resizing.

Closed Issue: AvalonDock XmlLayoutSerializer does not load layout [16159]

emartin — Fri, 17 May 2013 14:59:42 GMT

I've asked the question with all the details [here](http://stackoverflow.com/questions/15970888/avalondock-dockingmanager-does-not-load-layout)

Created Unassigned: VS2012 - WPF Sample Project not working [16202]

sreeker — Thu, 16 May 2013 22:31:01 GMT

HI

Tried use Avalon Dock in WPF- VS 2012, sample project compiles and executes fine, but design time not showing and It could not find any AvalonDock controls, like Resizepanel, other then DockManager, its not find sub elements. VS2012 .NET 4.5 and x86.

Commented Issue: Cannot resize panes [16194]

h0od — Sun, 12 May 2013 09:51:05 GMT

To reproduce, define the following style for your application.
```
<Application x:Class="WpfApplication1.App"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
StartupUri="MainWindow.xaml">
<Application.Resources>
<Style TargetType="Window" BasedOn="{StaticResource ResourceKey={x:Type Window}}">
<Setter Property="SizeToContent" Value="WidthAndHeight" />
</Style>
</Application.Resources>
</Application>
```
Then try to resize any pane in your application, you will notice that this is not possible.

AvalonDock is using a Window to facilitate the resize of the panes. And due to the defined style, SizeToContent is being applied to all Windows in the application. This messes with the calculations that AvalonDock is doing while resizing.
Comments: ** Comment from web user: h0od **

Patch submitted: [Patch 14466](https://www.codeplex.com/Download?ProjectName=avalondock&DownloadId=678630)

Created Issue: Cannot resize panes [16194]

h0od — Sun, 12 May 2013 09:45:14 GMT

To reproduce, define the following style for your application.
```
<Application x:Class="WpfApplication1.App"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
StartupUri="MainWindow.xaml">
<Application.Resources>
<Style TargetType="Window" BasedOn="{StaticResource ResourceKey={x:Type Window}}">
<Setter Property="SizeToContent" Value="WidthAndHeight" />
</Style>
</Application.Resources>
</Application>
```
Then try to resize any pane in your application, you will notice that this is not possible.

AvalonDock is using a Window to facilitate the resize of the panes. And due to the defined style, SizeToContent is being applied to all Windows in the application. This messes with the calculations that AvalonDock is doing while resizing.

Commented Issue: AvalonDock XmlLayoutSerializer does not load layout [16159]

cvetomirtodorov — Fri, 10 May 2013 08:25:49 GMT

I've asked the question with all the details [here](http://stackoverflow.com/questions/15970888/avalondock-dockingmanager-does-not-load-layout)
Comments: ** Comment from web user: cvetomirtodorov **

The solutions is to set values of the ContentId property for the LayoutDocument and LayoutAnchorable. This ticket can be closed.

Created Issue: MissAligned document section vs tool windows section [16192]

EricOuellet — Thu, 09 May 2013 15:43:24 GMT

Document portion is a little bit offset by few pixels down when compared to ToolWindow.
See attachement.

Created Issue: Loaded event called on DockableFloatingWindows.show [16184]

biggosh — Mon, 29 Apr 2013 15:12:28 GMT

Hello,

we are using last update of version 1.3,
When we show a new DockableFloatingWindow the venet loaded is called on every window opened.
This happens only for the first FloatingWindow showed.

How can we avoid this? We are using loaded event to initialize the content of grids and other fields.

Thanks in advance
ing. Christian Fontana

Created Issue: How to make the DocumentPanel Full Screen [16182]

shikaimin — Sat, 27 Apr 2013 05:13:41 GMT

In 1.x version, there has a attribute "IsShowHeader". I can hide all the UIElement and maximize the document.
But in 2.0 version, the attribute has disappeared, and how to make the document fullscreen?

Commented Issue: [Version 2.0] Missing feature from 1.x, DocumentPane.ShowHeader [15626]

shikaimin — Wed, 24 Apr 2013 14:54:51 GMT

Hi,

In previous versions, there was a property on the DocumentPane class that allowed to collapse the Header: DocumentPane.ShowHeader.

Creating the same effect in 2.0 is not possible unless I override the entire DockingManager style.

thank you
Comments: ** Comment from web user: shikaimin **

I want to make the Document fullscreen, but I can not hide the title in version2.0,
Can anyone help me?

Commented Issue: [Version 2.0 build 93790] ILayoutUpdateStrategy not working any more [15422]

pete46 — Wed, 24 Apr 2013 11:08:55 GMT

In the latest build the ILayoutUpdateStrategy not work anymore.
I have tested the AvalonDock.MVVMTestApp, I have added a LayoutAnchorablePane with name="ToolsPane" but in the method BeforeInsertAnchorable of the LayoutInitializer the line

var toolsPane = layout.Descendents().OfType<LayoutAnchorablePane>().FirstOrDefault(d => d.Name == "ToolsPane");

return always a null value, perhaps when this method is called the layout is not built with his Descendants?
Comments: ** Comment from web user: pete46 **

Is this still happening? I'm having similar problems. [SEE HERE](https://avalondock.codeplex.com/workitem/16172)

Commented Issue: NullPointerException in LayoutInitializer [16172]

pete46 — Tue, 23 Apr 2013 13:36:49 GMT

I think I've found a bug in the actual release (2.0.1746 ). I followed the strategy marked in the MVVM sample in my application. The difference is that I've more than one LayoutAnchorablePaneGroup. Here is the code of my LayoutInitializer (only the BeforeInsertAnchorable method):
```
public bool BeforeInsertAnchorable(LayoutRoot layout, LayoutAnchorable anchorableToShow, ILayoutContainer destinationContainer)
{
//AD wants to add the anchorable into destinationContainer
//just for test provide a new anchorablepane
//if the pane is floating let the manager go ahead
LayoutAnchorablePane destPane = destinationContainer as LayoutAnchorablePane;
if (destinationContainer != null &&
destinationContainer.FindParent<LayoutFloatingWindow>() != null)
return false;
//Console.Out.WriteLine(layout.Descendents().OfType<LayoutAnchorablePane>().Count());
string DestinationAnchorablePane = string.Empty;
if (anchorableToShow.Content is CTInfoPaneViewModel)
DestinationAnchorablePane = "CTTreeLayout";
else if (anchorableToShow.Content is CTTreePaneViewModel)
DestinationAnchorablePane = "CTInfoLayout";
else if (anchorableToShow.Content is InfoPaneViewModel)
DestinationAnchorablePane = "InfoAreaLayout";
else
return false;
var treePane =
layout.Descendents()
.OfType<LayoutAnchorablePane>().FirstOrDefault(d => d.Name == DestinationAnchorablePane);
if (treePane != null)
{
treePane.Children.Add(anchorableToShow);
return true;
}

return false;

}
```
The first "anchorableToShow" inserts correctly, and the number of layout children is correct (layout.Descendents().OfType<LayoutAnchorablePane>().Count()), so the var treePane is found. But the following anchorablePanes aren't found, because the children of root layout changes, so for the following panes the var treePane is null.
At first I thought it was some error of mine, but I couldn't find any error or reason.
I decided to try with an earlyer version of AvalonDock (2.0.1320) and now all works correctly.
It's easy to reproduce the error, just change to the last release (2.0.1746) and it happens again.
Comments: ** Comment from web user: pete46 **

Maybe I'm not the only one suffering this issue: [HERE](https://avalondock.codeplex.com/workitem/16050)

Commented Issue: ILayoutUpdateStrategy not working [16050]

pete46 — Tue, 23 Apr 2013 13:34:52 GMT

Hi all,

I'm using AvalonDock 2.0.1746 with PRISM and in my project I add LayoutAnchorable dynamically. This is my code:

```
public bool BeforeInsertAnchorable(LayoutRoot layout, LayoutAnchorable anchorableToShow,
ILayoutContainer destinationContainer)
{
//AD wants to add the anchorable into destinationContainer
//just for test provide a new anchorablepane
//if the pane is floating let the manager go ahead
var destPane = destinationContainer as LayoutAnchorablePane;
if (destinationContainer != null && destinationContainer.FindParent() != null) return false;

string destPaneName;
if (anchorableToShow.Content is ChartTabView)
destPaneName = "ChartToolsPane";
else if (anchorableToShow.Content is TreeNodesView)
destPaneName = "TreeToolsPane";
else
return false;

var toolsPane = layout.Descendents().OfType().FirstOrDefault(d => d.Name == destPaneName);
if (toolsPane == null) return false;

toolsPane.Children.Add(anchorableToShow);
return true;
}

```
In new version the layout.Descendents() always return null for "ChartToolsPane"(the "TreeToolsPane" I create when programm starts), but in older version it's working fine.

What can I resolve this problem?

Thanks,
Arthur
Comments: ** Comment from web user: pete46 **

I'm habing the same issue I suppose. I'm using the previous release of AvalonDock until issue gets solved.
My issue here [ISSUE](https://avalondock.codeplex.com/workitem/16172)

Created Issue: NullPointerException in LayoutInitializer [16172]

pete46 — Tue, 23 Apr 2013 08:52:54 GMT

Created Issue: AvalonDock XmlLayoutSerializer does not load layout [16159]

cvetomirtodorov — Mon, 15 Apr 2013 11:35:59 GMT

I've asked the question with all the details [here](http://stackoverflow.com/questions/15970888/avalondock-dockingmanager-does-not-load-layout)