Add callback onStepBegin

Author: roedll

example/src/main/java/com/quickbirdstudios/example/ui/main/MainActivity.kt

@@ -201,6 +201,16 @@ class MainActivity : AppCompatActivity() {
             }
         }
 
+        surveyView.onStepBegin = { step ->
+            when (step) {
+                is QuestionStep -> {
+                    Log.w ("ASDF", "step '${step?.id}': ${step.title} (${step.text})")
+                }
+                else ->
+                    Log.w ("ASDF", "step '${step?.id}'")
+            }
+        }
+
         val configuration = SurveyTheme(
             themeColorDark = ContextCompat.getColor(this, R.color.cyan_dark),
             themeColor = ContextCompat.getColor(this, R.color.cyan_normal),

survey/src/main/java/com.quickbirdstudios.surveykit/survey/Survey.kt

@@ -8,6 +8,7 @@ import com.quickbirdstudios.surveykit.result.TaskResult
 import com.quickbirdstudios.surveykit.steps.Step
 
 internal interface Survey {
+    var onStepBegin: (Step?) -> Unit
     var onStepResult: (Step?, StepResult?) -> Unit
     var onSurveyFinish: (TaskResult, FinishReason) -> Unit
 

survey/src/main/java/com.quickbirdstudios.surveykit/survey/SurveyView.kt

@@ -91,6 +91,8 @@ class SurveyView @JvmOverloads constructor(
 
     //region Overrides
 
+    override var onStepBegin: (Step?) -> Unit = { _ -> }
+
     override var onStepResult: (Step?, StepResult?) -> Unit = { _, _ -> }
 
     override var onSurveyFinish: (TaskResult, FinishReason) -> Unit = { _, _ -> }
@@ -121,6 +123,9 @@ class SurveyView @JvmOverloads constructor(
         val newStep = taskNavigator.nextStep(step, result) ?: return StepData(
             FinishReason.Completed
         )
+
+        onStepBegin(newStep)
+
         val newResult = presenter(
             Presenter.Transition.SlideFromRight, newStep, resultGatherer.retrieve(newStep.id)
         ).storeResult()
@@ -135,6 +140,9 @@ class SurveyView @JvmOverloads constructor(
             taskNavigator.previousStep(step) ?: return StepData(
                 FinishReason.Failed
             )
+
+        onStepBegin(previousStep)
+
         val newResult = presenter(
             Presenter.Transition.SlideFromLeft,
             previousStep,
@@ -150,6 +158,9 @@ class SurveyView @JvmOverloads constructor(
         val newStep = taskNavigator.nextStep(step) ?: return StepData(
             FinishReason.Completed
         )
+
+        onStepBegin(newStep)
+
         val newResult = presenter(
             Presenter.Transition.SlideFromRight, newStep, resultGatherer.retrieve(newStep.id)
         ).storeResult()