func (this *GUI) showOrHideContainerDependingOnIfElseEval(ifElseStmt interfaces.IfElse, conditionalContainerIfBody, conditionalContainerElseBody *ui.Box) {
conditionValue := ifElseStmt.EvalConditionAsBool(this.Symbols)
// ifElse if block condition evals to true
if conditionValue {
conditionalContainerIfBody.Show()
conditionalContainerElseBody.Hide()
return
}
// condition evals to false, show else body
conditionalContainerIfBody.Hide()
conditionalContainerElseBody.Show()
}
// VisitIfElse creates questions embedded in an its bodies and registers show/hide callbacks
func (this *GUI) VisitIfElse(ifElse interfaces.IfElse, context interface{}) interface{} {
guiQuestionsIfBody := handleQuestions(this, ifElse.IfBodyQuestions())
guiQuestionsElseBody := handleQuestions(this, ifElse.ElseBodyQuestions())
ifQuestionsEncompassingContainer := this.GUIForm.createQuestionTable(guiQuestionsIfBody)
elseQuestionsEncompassingContainer := this.GUIForm.createQuestionTable(guiQuestionsElseBody)
this.registerOnShowCallback(func() {
this.GUIForm.addQuestionContainer(ifQuestionsEncompassingContainer)
this.GUIForm.addQuestionContainer(elseQuestionsEncompassingContainer)
this.showOrHideContainerDependingOnIfElseEval(ifElse, ifQuestionsEncompassingContainer, elseQuestionsEncompassingContainer)
})
this.Symbols.RegisterCallback(func() {
log.Debug("Received symbols update callback in IfElse")
this.showOrHideContainerDependingOnIfElseEval(ifElse, ifQuestionsEncompassingContainer, elseQuestionsEncompassingContainer)
})
return nil
}