Slate event passing pointer failed?

Development Programming & Scripting UI
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1

cpp:

TSharedPtr<SEditableTextBox> MasterWinX;
TSharedPtr<SEditableTextBox> MasterWinY;

void SConfigFileGenerator::Construct(const FArguments& InArgs)
{
    ChildSlot
    [
        //...
        
        .OnTextChanged(this, &SConfigFileGenerator::isNumber, MasterWinX)

        //...    
        SAssignNew(MasterWinY, SEditableTextBox)
    ]
}

void SConfigFileGenerator::isNumber
(const FText& InText, TSharedPtr<SEditableTextBox> TextBox)
{
    FString TextBoxString = InText.ToString();

    if(TextBoxString.IsNumeric())
    {
        return;
    }
    
    int StringLen = TextBoxString.Len();
    TextBoxString.RemoveAt(StringLen > 0? StringLen-1 : StringLen, 1, true);
    TextBox.Get()->SetText(FText::FromString(TextBoxString));
}

Var TextBox in isNumber() always null

But it works fine if I change passing pointer to:

SAssignNew(MasterWinX, SEditableTextBox)
.OnTextChanged(this, &SConfigFileGenerator::isNumber, MasterWinY)

I don’t understand why this happened.

Is there anyway to fix this or bind slate event after initialized?

2

Hello! Can you try to separate Assign(…).OnTextChanged to 2 different operators? Maybe captured value is null (it depends on how compilator parse those line of code)…

3

The value is null if I try to pass the pointer from itself.

5

Hi buddy, did you get any way out with this yet?

Regards,

6

Sorry, haven’t solved yet. I’m just doing this another way by create custom SCompoundWidget to solve this problem.

7

But why do you want to pass them as params when you have them as cpp variables primarily?

8

Because I want to bind a function to multiple editabletextbox that can change text itself.
But I don’t want to create multiple function for each editabletextbox to do same thing.

9

But you can pass some index value as param while having textboxes in array and just get them by index… And the problem with null is as I said - capture effect.