[UE] Slate editor dynamically adds Button

foreword

Implement the editor to dynamically add interface elements, such as buttons

Effect

accomplish

.h file to add definition

.cpp file implements logic

1. interface layout

TSharedRef<SDockTab> FDynamicCreateToolModule::OnSpawnPluginTab(const FSpawnTabArgs& SpawnTabArgs)
{
    
    
       TSharedRef<SDockTab> dockTabSharedRef =
              SNew(SDockTab)
              .TabRole(ETabRole::NomadTab)
              [
                     SNew(SVerticalBox)
                     + SVerticalBox::Slot()
                     [
                           SNew(SHorizontalBox)
                           + SHorizontalBox::Slot()
                           [
                                  SNew(SButton)
                                  .Text(FText::FromString("Add"))
                                  .OnClicked_Raw(this, &FDynamicCreateToolModule::AddButtonOnClick)
                                  ]
                           + SHorizontalBox::Slot()
                           [
                                  SNew(SButton)
                                  .Text(FText::FromString("Remove"))
                                  .OnClicked_Raw(this, &FDynamicCreateToolModule::RemoveButtonOnClick)
                           ]
                     ]
                     + SVerticalBox::Slot()
                     [
                           SAssignNew(VerticalBoxPtr, SVerticalBox)
                     ]
              ];
       return dockTabSharedRef;
}

2. button click

FReply FDynamicCreateToolModule::AddButtonOnClick()
{
    
    
       ButtonCount += 1;
       UpdateDynamicButtonCount();
       return FReply::Handled();
}
FReply FDynamicCreateToolModule::RemoveButtonOnClick()
{
    
    
       ButtonCount -= 1;
       if (ButtonCount < 0)
       {
    
    
              ButtonCount = 0;
       }
       UpdateDynamicButtonCount();
       return FReply::Handled();
}
void FDynamicCreateToolModule::UpdateDynamicButtonCount()
{
    
    
       VerticalBoxPtr->ClearChildren();
       for (int index = 0; index < ButtonCount; index++)
       {
    
    
              int id = index;
              VerticalBoxPtr->AddSlot()
                     [
                           SNew(SButton)
                           .Text(FText::FromString(FString::FromInt(id)))
                           .OnClicked(FOnClicked::CreateLambda([id]
                                  {
    
    
                                         UE_LOG(LogTemp, Display, TEXT("OnClick: %d"), id);
                                         return FReply::Handled();
                                  }))
                     ];
              VerticalBoxPtr->AddSlot()
                     [
                           SNullWidget::NullWidget
                     ];
       }
}