[RELEASED] Data Bind for Unity

Hi @hananet0282,

Thanks for trying Data Bind!

Without knowing your exact use case it is hard to say what will solve your problem. But you can have a look at

Code (CSharp):

1. DictionaryLookup

, it is a mono behaviour with which you can access a data dictionary of a context. Hope that helps! If not, please provide a small example so I can see what you are trying to do

 

I've updated from Unity 2019 to Unity 2020.3.40f1 and the following problem appeared.

If have a Button which uses the following structure:
- GameObject
- GameObject with CanvasGroup
- GameObject with TextMeshProText UI
- Rest are DataBind objects

DataBind should control the Alpha value of the CanvasGroup. I use a BooleanSwitch which returns 0.2 or 0.6 and a CanvasGroupAlphaSetter that references the CanvasGroup and BooleanSwitch as Provider

Now in the editor everything works fine but on Android the button is always fully opaque. I've tried setting the Alpha of the CanvasGroup to something transparent but it's always opaque. Only when I remove the DataBind script the button stays transparent.

Maybe BooleanSwitch interpretes 0.6 and 0.2 wrong or something...

I'm using the latest version of DataBind.

Thanks already for your help!

 

Hi @Asse1,

Sorry for the late reply, I was on vacation last week.

There is no difference between the platforms, so it sounds very strange to me that it works for you in the editor but not on Android. Are you sure it is caused by the Data Bind scripts?

I have an Android device here as well, so please send me a small example project with which I can reproduce the issue.

Cheers
Christian

 

Hey @coeing,

in the end Convert.ChangeType() seems to be culture-independent in Unity 2019 and is dependent in Unity 2020.

That's why after upgrading Unity to 2020 everything worked on my laptop (where culture info was resolved to en-us) and not on my phone (where it was resolved to de-de).

So in the editor "0.5" was converted to 0.5 but on my phone it was converted to 1.

Best,
Ruben

 

Hi Ruben!

I see, great find! I will see what I can do about it for the next version. I added an issue to the data bind issue tracker: https://bitbucket.org/coeing/data-bind/issues/105/booleanswitch-handles-floats-different-in

Thanks for your report!

Cheers
Christian

 

Hello @coeing Thanks for writing this library, we're investigating it for usage in one of our titles. In the past we have written our own DB lib, this strictly used string based paths to declare and create the node tree. So, for example, you could have A.B.C and this would create a nodes for each of A, B and C. Within our setter controls, you could reference any node in a path such as "A" or "A.B" or "A.B.C" etc. This was a simple string, nothing fancy and required typing this into the control.

Nodes were lazily created as data was place inside them. This has some overhead on string processing and memory management. However, what it did do is complete separate logic from the presentation by acting as a simple proxy. As long as no one changed the string reference (often stored as consts in code) then the implementation would not break.

My only concern with Slash is that if someone changes the name of a bound getter, this will pretty much break the presentation side (i.e uGUI). I suppose we can write proxy objects that are clearly marked as such, but was wondering if there was another approach in Slash DB? (I might also be missing something too)

 

Hi @wdc_bigbluegames,

Thanks for checking out my library.

It will indeed break the references without giving a compilation error if someone changes the data context and does not change the string references to it in the data bind scripts (getters, setters,...). But then again the developers should have enough knowledge about the data binding that they know about the role of the data contexts and that they should be kept pretty stable. This is often no problem as you can have arbitrary complex logic behind the data context, the data context is just the interface between the application logic and the UI.

I think what you mean with proxy objects are already the data contexts that data bind uses, so hopefully this serves your requirements well

Cheers
Christian

 

@Asse1

I had time to fix the issue. I was able to reproduce it on my machine (also having `de-de` ) and the fix was straight-forward: Using CultureInfo.InvariantCulture when using Convert.ChangeType in ReflectionUtils.TryConvertValue.

Just in case you want to fix it locally before I release the next version (which will probably be in a few weeks).

 

The new version 1.23 of Data Bind was just submitted and is now in review

If there are any issues you are still missing, there is a public issue tracker where everybody can add their wishes, bug reports, ideas, feedback,...:

https://bitbucket.org/coeing/data-bind/issues

The main additions:
- #106 Do not store properties in DataBindingPropertyDrawer
- #105 Convert values in `TryConvertValue` culture-independent

The new version will be available in a few days in the Unity Asset Store:

https://assetstore.unity.com/packages/tools/gui/data-bind-for-unity-28301

 

Hi there! Great product, we've been using it successfully for our UI for a couple of years now.

I've got an issue regarding GameObjectItemsSetter and a tree-like data context. The structure is a top-level Plan context, which has a collection of Milestone contexts, and Milestone has a collection of Milestones (i.e. a Milestone can have 0 or more sub-milestones and so on down the tree).

Here's the top-level context:

Code (CSharp):

1. public class PlanContext : Context
2.     {
3.         private readonly Property<Collection<MilestoneContext>> m_milestonesProperty;
4.  
5.         public Collection<MilestoneContext> Milestones
6.         {
7.             get => m_milestonesProperty.Value;
8.             set => m_milestonesProperty.Value = value;
9.         }
10.  
11.         public PlanContext(List<MilestoneContext> milestones)
12.         {
13.             m_milestonesProperty = new Property<Collection<MilestoneContext>>(new Collection<MilestoneContext>());
14.  
15.             foreach (MilestoneContext milestone in milestones)
16.             {
17.                 m_milestonesProperty.Value.Add(milestone);
18.             }
19.         }
20.     }

And the Milestone context:

Code (CSharp):

1. public class MilestoneContext : Context
2.     {
3.         private readonly Property<Collection<MilestoneContext>> m_milestonesProperty;
4.  
5.         private readonly Property<string> m_nameProperty = new();
6.         private readonly Property<Color> m_colorProperty = new();
7.      
8.         public Collection<MilestoneContext> Milestones
9.         {
10.             get => m_milestonesProperty.Value;
11.             set => m_milestonesProperty.Value = value;
12.         }
13.  
14.         public string Name
15.         {
16.             get => m_nameProperty.Value;
17.             set => m_nameProperty.Value = value;
18.         }
19.  
20.         public Color Color
21.         {
22.             get => m_colorProperty.Value;
23.             set => m_colorProperty.Value = value;
24.         }
25.      
26.  
27.         public MilestoneContext(string name, Color color, List<MilestoneContext> subMilestones)
28.         {
29.             m_milestonesProperty = new Property<Collection<MilestoneContext>>(new Collection<MilestoneContext>());
30.  
31.             foreach (MilestoneContext milestone in subMilestones)
32.             {
33.                 m_milestonesProperty.Value.Add(milestone);
34.             }
35.  
36.             m_nameProperty.Value = name;
37.             m_colorProperty.Value = color;
38.         }
39. }

If I attempt to use GameObjectItemsSetter to spawn in the tree, it results in a stack overflow after it gets tuck in a loop repeatedly spawning the first child of a top-level Milestone.

Spoiler: Stack trace

InsufficientExecutionStackException: Insufficient stack to continue executing the program safely. This can happen from having too many functions on the call stack or function on the stack using too much stack space.
UnityEngine.Object.Instantiate[T] (T original) (at <bae255e3e08e46f7bc2fbd23dde96338>:0)
Slash.Unity.DataBind.Foundation.Setters.GameObjectItemsSetter.CreateItem (System.Object itemContext, System.Int32 itemIndex) (at Assets/Scripts/Databind/Scripts/Foundation/Setters/GameObjectItemsSetter.cs:106)
Slash.Unity.DataBind.Foundation.Setters.ItemsSetter.CreateItems (System.Collections.IEnumerable itemContexts) (at Assets/Scripts/Databind/Scripts/Foundation/Setters/ItemsSetter.cs:143)
Slash.Unity.DataBind.Foundation.Setters.ItemsSetter.CreateItems (System.Object newValue) (at Assets/Scripts/Databind/Scripts/Foundation/Setters/ItemsSetter.cs:162)
Slash.Unity.DataBind.Foundation.Setters.ItemsSetter.UpdateTargetValue (UnityEngine.Transform target, System.Object value) (at Assets/Scripts/Databind/Scripts/Foundation/Setters/ItemsSetter.cs:106)
Slash.Unity.DataBind.Foundation.Setters.ComponentSingleSetter`2[TComponent,TData].OnValueChanged (TData newValue) (at Assets/Scripts/Databind/Scripts/Foundation/Setters/ComponentSingleSetter.cs:133)
Slash.Unity.DataBind.Foundation.Setters.SingleSetter`1[TData].OnObjectValueChanged () (at Assets/Scripts/Databind/Scripts/Foundation/Setters/SingleSetter.cs:137)
Slash.Unity.DataBind.Foundation.Setters.SingleSetter`1[TData].Enable () (at Assets/Scripts/Databind/Scripts/Foundation/Setters/SingleSetter.cs:96)
Slash.Unity.DataBind.Foundation.Setters.ComponentSingleSetter`2[TComponent,TData].Enable () (at Assets/Scripts/Databind/Scripts/Foundation/Setters/ComponentSingleSetter.cs:80)
Slash.Unity.DataBind.Core.Presentation.DataBindingOperator.OnEnable () (at Assets/Scripts/Databind/Scripts/Core/Presentation/DataBindingOperator.cs:177)
UnityEngine.GameObject:SetActive(GameObject, Boolean)

For reference, I'm only creating three contexts: Plan -> Milestone 1 -> Sub milestone 1. You can see in the holder in the screenshot that there's only one child milestone in the tree.



I may be missing something simple, or it may be that having a tree of data is just out of scope for the items setter!

This is a cut-down scenario from the actual project I'm working on, but I've reproed in a blank project for you: https://1drv.ms/u/s!AhdchalVsPvXnd4ELBo3kH982J7YQw?e=jWe8Ei (OneDrive link)

Edit: I've just noticed (looking a the runtime screenshot above) that the Prefab for the Items Setter has changed to Milestone(Clone) - maybe referencing itself(?) rather than the prefab asset that it should be set to. Just checked my Prefab and lo and behold, it's referencing itself. If I change it back to the Milestone asset, save the prefab, then re-open it, it changes back to a self-reference. Odd. Maybe an issue with the inspector, or a unity bug.

Edit 2: Wow OK, TIL: https://forum.unity.com/threads/prefab-with-reference-to-itself.412240/

I'll probably have to work around this using a custom ItemsSetter that looks up prefabs from a dictionary SO. I'll leave this here in case future folks come across this problem!

 

Hi @GarethIW ,

Thanks a lot for your message and sorry for the late reply.

Glad you seem to have found the reason for your issue already. Nonetheless I'd like to have a look at your sample when I find time to see if I find a way to prevent the infinite loop inside Data Bind itself. I created an issue at https://bitbucket.org/coeing/data-bind/issues/109/circular-dependency-in-data-context where I will post my updates.

 

Hi @GarethIW,

Just wanted to inform you that I had a look at your sample case. But as you already found out, this is by design in Unity and I don't want to do some special treatment there that differs from the way it is done in Unity. But in the forum thread you posted there seem to be some workarounds, so you have probably fixed it already

Cheers and have a nice weekend
Christian

 

The new version 1.24 of Data Bind was just submitted and is now in review

If there are any issues you are still missing, there is a public issue tracker where everybody can add their wishes, bug reports, ideas, feedback,...:

https://bitbucket.org/coeing/data-bind/issues

The additions:
- Update to 2022.3.2f1
- #107 Add flag `NoInitialUpdate` to `ContextDataUpdater` to influence the update order of a two-way binding

The new version will be available in a few days in the Unity Asset Store:

https://assetstore.unity.com/packages/tools/gui/data-bind-for-unity-28301

 

Hi @coeing! Recently started using Data Bind and it has been excellent so far. I believe I just ran into a small bug I wanted to flag, it seems that "double" type values are not rendered correctly on the context holder. When I change the type to float it works but I need the double type for my particular case. It seems it still works as expected in every other area but I cannot tweak double values through the context holder.

 

Hi @Cabron007,

Thanks a lot for using Data Bind and for your report! I will have a look at this issue and if I can reproduce it (which should not be a problem) it will be fixed in the next version I created a new issue here: https://bitbucket.org/coeing/data-bind/issues/111/data-property-of-type-double-does-not-show

 

Hello, I am having an issue with using this asset, so I am leaving a post. I created a 2D Core project, imported the asset, and performed the same actions as in the following video, but it does not work.

Device: MacBook Pro 14 M1 Pro
OS: macOS Sonoma 14.0
Unity Version: 2022.3.0 LTS
Asset Version: 1.24

The Text was initialized to "Hello World" in the constructor of the Property and it was reflected in the View, however, the Text changed through the execution of a method is not reflected in the View.

 

Hi @Alyxer ,

Thanks for using my asset. In your video I saw that your data property is called `text`. The default naming convention by which Data Bind looks up the data property behind a property is `${PropertyName}Property`, so in your case `textProperty` or `TextProperty`. It is possible to overwrite the default convention with a DataBindSettings scriptable object, but I guess in your example you are just using the default settings.

Please also check out the `LabelSetter` example in the `Examples` folder, it is a lot like your example

Hope this helps, if not let me know!

Cheers
Christian