Choose layout wizard step

android-app-tests/src/test/java/org/solovyev/android/calculator/wizard/OnScreenCalculatorWizardStepTest.java

@@ -78,13 +78,13 @@ public class OnScreenCalculatorWizardStepTest {
 
 	@Test
 	public void testShouldRestoreStateOnRestart() throws Exception {
-		fragment.getOnscreenCalculatorCheckbox().setChecked(true);
+		fragment.getCheckbox().setChecked(true);
 		controller.restart();
-		assertTrue(fragment.getOnscreenCalculatorCheckbox().isChecked());
+		assertTrue(fragment.getCheckbox().isChecked());
 
-		fragment.getOnscreenCalculatorCheckbox().setChecked(false);
+		fragment.getCheckbox().setChecked(false);
 		controller.restart();
-		assertFalse(fragment.getOnscreenCalculatorCheckbox().isChecked());
+		assertFalse(fragment.getCheckbox().isChecked());
 	}
 
 	@Test

android-app/src/main/java/org/solovyev/android/calculator/App.java

@@ -24,8 +24,10 @@ package org.solovyev.android.calculator;
 
 import android.app.Application;
 import android.content.SharedPreferences;
+import android.content.res.Configuration;
 import android.preference.PreferenceManager;
 import org.solovyev.android.UiThreadExecutor;
+import org.solovyev.android.Views;
 import org.solovyev.android.calculator.ga.Ga;
 import org.solovyev.android.checkout.*;
 import org.solovyev.common.listeners.JEvent;
@@ -214,4 +216,8 @@ public final class App {
 	public static Products getProducts() {
 		return products;
 	}
+
+	public static boolean isLargeScreen() {
+		return Views.isLayoutSizeAtLeast(Configuration.SCREENLAYOUT_SIZE_LARGE, App.getApplication().getResources().getConfiguration());
+	}
 }

android-app/src/main/java/org/solovyev/android/calculator/CalculatorButtons.java

@@ -92,8 +92,7 @@ public final class CalculatorButtons {
 										  @Nonnull Activity activity) {
 		preferences = preferences == null ? PreferenceManager.getDefaultSharedPreferences(activity) : preferences;
 
-		final boolean large = Views.isLayoutSizeAtLeast(Configuration.SCREENLAYOUT_SIZE_LARGE, activity.getResources().getConfiguration()) &&
+		final boolean large = App.isLargeScreen() && Preferences.Gui.getLayout(preferences).isOptimized();
-				Preferences.Gui.getLayout(preferences).isOptimized();
 
 		if (!large) {
 			if (Views.getScreenOrientation(activity) == Configuration.ORIENTATION_PORTRAIT

android-app/src/main/java/org/solovyev/android/calculator/math/edit/VarEditDialogFragment.java

@@ -59,15 +59,17 @@ public class VarEditDialogFragment extends DialogFragment implements CalculatorE
 	private final static String greekAlphabet = "αβγδεζηθικλμνξοπρστυφχψω";
 	private final static List<Character> acceptableChars = Arrays.asList(Strings.toObjects(("1234567890abcdefghijklmnopqrstuvwxyzйцукенгшщзхъфывапролджэячсмитьбюё_" + greekAlphabet).toCharArray()));
 
-	@Nonnull
+	private Input input;
-	private final Input input;
 
 	public VarEditDialogFragment() {
-		this(Input.newInstance());
+		input = Input.newInstance();
 	}
 
-	public VarEditDialogFragment(@Nonnull Input input) {
+	@Nonnull
-		this.input = input;
+	public static VarEditDialogFragment create(@Nonnull Input input) {
+		final VarEditDialogFragment fragment = new VarEditDialogFragment();
+		fragment.input = input;
+		return fragment;
 	}
 
 	@Override
@@ -255,7 +257,7 @@ public class VarEditDialogFragment extends DialogFragment implements CalculatorE
 	*/
 
 	public static void showDialog(@Nonnull Input input, @Nonnull FragmentManager fm) {
-		AndroidSherlockUtils.showDialog(new VarEditDialogFragment(input), "constant-editor", fm);
+		AndroidSherlockUtils.showDialog(create(input), "constant-editor", fm);
 	}
 
 	public static class Input {

android-app/src/main/java/org/solovyev/android/calculator/wizard/CalculatorWizardStep.java

@@ -22,22 +22,14 @@
 
 package org.solovyev.android.calculator.wizard;
 
-import android.content.res.Configuration;
 import android.os.Bundle;
 import android.support.v4.app.Fragment;
 import org.solovyev.android.calculator.App;
-import org.solovyev.android.Views;
-import org.solovyev.android.calculator.Preferences;
 import org.solovyev.android.calculator.R;
 
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
 
-import static org.solovyev.android.calculator.CalculatorApplication.getPreferences;
-import static org.solovyev.android.calculator.wizard.ChooseLayoutWizardStep.LAYOUT;
-import static org.solovyev.android.calculator.wizard.ChooseModeWizardStep.MODE;
-import static org.solovyev.android.calculator.wizard.OnScreenCalculatorWizardStep.ONSCREEN_CALCULATOR_ENABLED;
-
 /**
  * User: serso
  * Date: 6/16/13
@@ -48,71 +40,14 @@ enum CalculatorWizardStep implements org.solovyev.android.wizard.WizardStep {
 	welcome(WelcomeWizardStep.class, R.string.cpp_wizard_welcome_title, R.string.cpp_wizard_start),
 
 	choose_layout(ChooseLayoutWizardStep.class, R.string.cpp_wizard_layout_title) {
-		@Override
-		public boolean onNext(@Nonnull Fragment f) {
-			final ChooseLayoutWizardStep fragment = (ChooseLayoutWizardStep) f;
-
-			final CalculatorLayout layout = fragment.getSelectedLayout();
-			layout.apply(getPreferences());
-
-			return true;
-		}
-
-		@Nullable
-		@Override
-		public Bundle getFragmentArgs() {
-			final Bundle bundle = new Bundle();
-			bundle.putSerializable(LAYOUT, CalculatorLayout.fromGuiLayout(Preferences.Gui.layout.getPreference(getPreferences())));
-			return bundle;
-		}
-
 		@Override
 		public boolean isVisible() {
-			return Views.isLayoutSizeAtLeast(Configuration.SCREENLAYOUT_SIZE_LARGE, App.getApplication().getResources().getConfiguration());
+			return App.isLargeScreen();
 		}
 	},
-
+	choose_mode(ChooseModeWizardStep.class, R.string.cpp_wizard_mode_title),
-	choose_mode(ChooseModeWizardStep.class, R.string.cpp_wizard_mode_title) {
+	on_screen_calculator(OnScreenCalculatorWizardStep.class, R.string.cpp_wizard_onscreen_calculator_title),
-		@Override
-		public boolean onNext(@Nonnull Fragment f) {
-			final ChooseModeWizardStep fragment = (ChooseModeWizardStep) f;
-
-			final CalculatorMode mode = fragment.getSelectedMode();
-			mode.apply(getPreferences());
-
-			return true;
-		}
-
-		@Nullable
-		@Override
-		public Bundle getFragmentArgs() {
-			final Bundle bundle = new Bundle();
-			bundle.putSerializable(MODE, CalculatorMode.fromGuiLayout(Preferences.Gui.layout.getPreference(getPreferences())));
-			return bundle;
-		}
-	},
-
-	on_screen_calculator(OnScreenCalculatorWizardStep.class, R.string.cpp_wizard_onscreen_calculator_title) {
-		@Override
-		public boolean onNext(@Nonnull Fragment f) {
-			final OnScreenCalculatorWizardStep fragment = (OnScreenCalculatorWizardStep) f;
-
-			Preferences.OnscreenCalculator.showAppIcon.putPreference(getPreferences(), fragment.isOnscreenCalculatorEnabled());
-
-			return true;
-		}
-
-		@Nullable
-		@Override
-		public Bundle getFragmentArgs() {
-			final Bundle bundle = new Bundle();
-			bundle.putSerializable(ONSCREEN_CALCULATOR_ENABLED, Preferences.OnscreenCalculator.showAppIcon.getPreference(getPreferences()));
-			return bundle;
-		}
-	},
-
 	drag_button(DragButtonWizardStep.class, R.string.cpp_wizard_dragbutton_title),
-
 	last(FinalWizardStep.class, R.string.cpp_wizard_final_title);
 
 	@Nonnull

android-app/src/main/java/org/solovyev/android/calculator/wizard/ChooseLayoutWizardStep.java

@@ -23,106 +23,66 @@
 package org.solovyev.android.calculator.wizard;
 
 import android.os.Bundle;
-import android.support.v4.app.Fragment;
-import android.view.LayoutInflater;
 import android.view.View;
-import android.view.ViewGroup;
+import android.widget.AdapterView;
-import android.widget.RadioButton;
+import android.widget.ImageView;
-
+import android.widget.Spinner;
+import org.solovyev.android.calculator.Preferences;
 import org.solovyev.android.calculator.R;
 
 import javax.annotation.Nonnull;
-import javax.annotation.Nullable;
 
-import static org.solovyev.android.calculator.wizard.CalculatorLayout.*;
+import static org.solovyev.android.calculator.CalculatorApplication.getPreferences;
+import static org.solovyev.android.calculator.wizard.CalculatorLayout.big_buttons;
+import static org.solovyev.android.calculator.wizard.CalculatorLayout.optimized;
 
 /**
  * User: serso
  * Date: 6/19/13
  * Time: 12:33 AM
  */
-public class ChooseLayoutWizardStep extends Fragment {
+public class ChooseLayoutWizardStep extends WizardFragment implements AdapterView.OnItemSelectedListener {
-
-	/*
-	**********************************************************************
-	*
-	*                           CONSTANTS
-	*
-	**********************************************************************
-	*/
-
-	static final String LAYOUT = "layout";
-
-	/*
-	**********************************************************************
-	*
-	*                           FIELDS
-	*
-	**********************************************************************
-	*/
-
-	@Nullable
-	private RadioButton optimizedRadioButton;
-
-	@Nullable
-	private RadioButton bigButtonsRadioButton;
-
-	private CalculatorLayout layout;
 
 	@Override
-	public void onCreate(Bundle savedInstanceState) {
+	protected int getViewResId() {
-		super.onCreate(savedInstanceState);
+		return R.layout.cpp_wizard_step_choose_layout;
-
-		if (savedInstanceState != null) {
-			layout = (CalculatorLayout) savedInstanceState.getSerializable(LAYOUT);
 	}
 
-		if (layout == null) {
+	private ImageView image;
-			layout = (CalculatorLayout) getArguments().getSerializable(LAYOUT);
-		}
-	}
-
-	@Override
-	public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
-		return inflater.inflate(R.layout.cpp_wizard_step_choose_layout, null);
-	}
 
 	@Override
 	public void onViewCreated(View root, Bundle savedInstanceState) {
 		super.onViewCreated(root, savedInstanceState);
 
-		optimizedRadioButton = (RadioButton) root.findViewById(R.id.wizard_optimized_radiobutton);
+		final CalculatorLayout layout = CalculatorLayout.fromGuiLayout(Preferences.Gui.layout.getPreference(getPreferences()));
-		bigButtonsRadioButton = (RadioButton) root.findViewById(R.id.wizard_big_buttons_radiobutton);
 
-		switch (layout) {
+		image = (ImageView) root.findViewById(R.id.wizard_layout_image);
-			case big_buttons:
+		final Spinner spinner = (Spinner) root.findViewById(R.id.wizard_layout_spinner);
-				bigButtonsRadioButton.setChecked(true);
+		spinner.setAdapter(new WizardArrayAdapter(getActivity(), R.array.cpp_layouts));
-				optimizedRadioButton.setChecked(false);
+		spinner.setSelection(layout == big_buttons ? 0 : 1);
-				break;
+		spinner.setOnItemSelectedListener(this);
-			case optimized:
+
-				bigButtonsRadioButton.setChecked(false);
+		updateImage(layout);
-				optimizedRadioButton.setChecked(true);
-				break;
-		}
 	}
 
-	@Nonnull
+	private void updateImage(@Nonnull CalculatorLayout layout) {
-	CalculatorLayout getSelectedLayout() {
+		image.setImageResource(layout == big_buttons ? R.drawable.layout_big_buttons : R.drawable.layout_optimized);
-		CalculatorLayout layout = getDefaultLayout();
-
-		if (bigButtonsRadioButton != null && bigButtonsRadioButton.isChecked()) {
-			layout = big_buttons;
-		} else if (optimizedRadioButton != null && optimizedRadioButton.isChecked()) {
-			layout = optimized;
-		}
-
-		return layout;
 	}
 
 	@Override
 	public void onSaveInstanceState(Bundle outState) {
 		super.onSaveInstanceState(outState);
+	}
+
+	@Override
+	public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
+		final CalculatorLayout layout = position == 0 ? big_buttons : optimized;
+		layout.apply(getPreferences());
+		updateImage(layout);
+	}
+
+	@Override
+	public void onNothingSelected(AdapterView<?> parent) {
 
-		outState.putSerializable(LAYOUT, layout);
 	}
 }

android-app/src/main/java/org/solovyev/android/calculator/wizard/ChooseModeWizardStep.java

@@ -22,19 +22,17 @@
 
 package org.solovyev.android.calculator.wizard;
 
-import android.content.Context;
 import android.os.Bundle;
-import android.view.LayoutInflater;
 import android.view.View;
-import android.view.ViewGroup;
 import android.widget.AdapterView;
-import android.widget.ArrayAdapter;
 import android.widget.Spinner;
 import android.widget.TextView;
+import org.solovyev.android.calculator.Preferences;
 import org.solovyev.android.calculator.R;
 
 import javax.annotation.Nonnull;
 
+import static org.solovyev.android.calculator.CalculatorApplication.getPreferences;
 import static org.solovyev.android.calculator.wizard.CalculatorMode.*;
 
 /**
@@ -44,42 +42,8 @@ import static org.solovyev.android.calculator.wizard.CalculatorMode.*;
  */
 public class ChooseModeWizardStep extends WizardFragment implements AdapterView.OnItemSelectedListener {
 
-	/*
-	**********************************************************************
-	*
-	*                           CONSTANTS
-	*
-	**********************************************************************
-	*/
-
-	static final String MODE = "mode";
-
-	/*
-	**********************************************************************
-	*
-	*                           FIELDS
-	*
-	**********************************************************************
-	*/
-
-	private Spinner spinner;
 	private TextView description;
 
-	private CalculatorMode mode;
-
-	@Override
-	public void onCreate(Bundle savedInstanceState) {
-		super.onCreate(savedInstanceState);
-
-		if (savedInstanceState != null) {
-			mode = (CalculatorMode) savedInstanceState.getSerializable(MODE);
-		}
-
-		if (mode == null) {
-			mode = (CalculatorMode) getArguments().getSerializable(MODE);
-		}
-	}
-
 	@Override
 	protected int getViewResId() {
 		return R.layout.cpp_wizard_step_choose_mode;
@@ -89,59 +53,28 @@ public class ChooseModeWizardStep extends WizardFragment implements AdapterView.
 	public void onViewCreated(View root, Bundle savedInstanceState) {
 		super.onViewCreated(root, savedInstanceState);
 
-		spinner = (Spinner) root.findViewById(R.id.wizard_mode_spinner);
+		final CalculatorMode mode = CalculatorMode.fromGuiLayout(Preferences.Gui.layout.getPreference(getPreferences()));
-		spinner.setAdapter(new MyArrayAdapter(getActivity()));
+		final Spinner spinner = (Spinner) root.findViewById(R.id.wizard_mode_spinner);
+		spinner.setAdapter(new WizardArrayAdapter(getActivity(), R.array.cpp_modes));
+		spinner.setSelection(mode == simple ? 0 : 1);
 		spinner.setOnItemSelectedListener(this);
 
 		description = (TextView) root.findViewById(R.id.wizard_mode_description);
-		updateDescription();
+		updateDescription(mode);
 	}
 
-	private void updateDescription() {
+	private void updateDescription(@Nonnull CalculatorMode mode) {
 		description.setText(mode == simple ? R.string.cpp_wizard_mode_simple_description : R.string.cpp_wizard_mode_engineer_description);
 	}
 
-	@Nonnull
-	CalculatorMode getSelectedMode() {
-		if (spinner != null) {
-			return mode;
-		}
-
-		return getDefaultMode();
-	}
-
-	@Override
-	public void onSaveInstanceState(Bundle outState) {
-		super.onSaveInstanceState(outState);
-
-		outState.putSerializable(MODE, mode);
-	}
-
 	@Override
 	public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
-		mode = position == 0 ? simple : engineer;
+		final CalculatorMode mode = position == 0 ? simple : engineer;
-		updateDescription();
+		mode.apply(getPreferences());
+		updateDescription(mode);
 	}
 
 	@Override
 	public void onNothingSelected(AdapterView<?> parent) {
-
-	}
-
-	private static final class MyArrayAdapter extends ArrayAdapter<String> {
-
-		public MyArrayAdapter(Context context) {
-			super(context, android.R.layout.simple_spinner_item, context.getResources().getStringArray(R.array.cpp_modes));
-			setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
-		}
-
-		@Override
-		public View getView(int position, View convertView, ViewGroup parent) {
-			final View view = super.getView(position, convertView, parent);
-			if (view instanceof TextView) {
-				((TextView) view).setTextAppearance(getContext(), android.R.style.TextAppearance_Large);
-			}
-			return view;
-		}
 	}
 }

android-app/src/main/java/org/solovyev/android/calculator/wizard/OnScreenCalculatorWizardStep.java

@@ -25,48 +25,18 @@ package org.solovyev.android.calculator.wizard;
 import android.os.Bundle;
 import android.view.View;
 import android.widget.CheckBox;
+import android.widget.CompoundButton;
 import org.solovyev.android.calculator.Preferences;
 import org.solovyev.android.calculator.R;
 
 import javax.annotation.Nullable;
 
-public class OnScreenCalculatorWizardStep extends WizardFragment {
+import static org.solovyev.android.calculator.CalculatorApplication.getPreferences;
 
-	/*
+public class OnScreenCalculatorWizardStep extends WizardFragment implements CompoundButton.OnCheckedChangeListener {
-	**********************************************************************
-	*
-	*                           CONSTANTS
-	*
-	**********************************************************************
-	*/
-
-	static final String ONSCREEN_CALCULATOR_ENABLED = "onscreen_calculator_enabled";
-
-	/*
-	**********************************************************************
-	*
-	*                           FIELDS
-	*
-	**********************************************************************
-	*/
 
 	@Nullable
-	private CheckBox onscreenCalculatorCheckbox;
+	private CheckBox checkbox;
-
-	private Boolean onscreenCalculatorEnabled;
-
-	@Override
-	public void onCreate(Bundle savedInstanceState) {
-		super.onCreate(savedInstanceState);
-
-		if (savedInstanceState != null && savedInstanceState.containsKey(ONSCREEN_CALCULATOR_ENABLED)) {
-			onscreenCalculatorEnabled = savedInstanceState.getBoolean(ONSCREEN_CALCULATOR_ENABLED);
-		}
-
-		if (onscreenCalculatorEnabled == null) {
-			onscreenCalculatorEnabled = getArguments().getBoolean(ONSCREEN_CALCULATOR_ENABLED, Preferences.OnscreenCalculator.showAppIcon.getDefaultValue());
-		}
-	}
 
 	@Override
 	protected int getViewResId() {
@@ -77,31 +47,20 @@ public class OnScreenCalculatorWizardStep extends WizardFragment {
 	public void onViewCreated(View root, Bundle savedInstanceState) {
 		super.onViewCreated(root, savedInstanceState);
 
-		onscreenCalculatorCheckbox = (CheckBox) root.findViewById(R.id.wizard_onscreen_app_enabled_checkbox);
+		final Boolean enabled = Preferences.OnscreenCalculator.showAppIcon.getPreference(getPreferences());
-		onscreenCalculatorCheckbox.setChecked(onscreenCalculatorEnabled);
+		checkbox = (CheckBox) root.findViewById(R.id.wizard_onscreen_app_enabled_checkbox);
-	}
+		checkbox.setChecked(enabled);
-
+		checkbox.setOnCheckedChangeListener(this);
-	public Boolean isOnscreenCalculatorEnabled() {
-		boolean enabled = Preferences.OnscreenCalculator.showAppIcon.getDefaultValue();
-
-		if (onscreenCalculatorCheckbox != null) {
-			enabled = onscreenCalculatorCheckbox.isChecked();
-		}
-
-		return enabled;
-	}
-
-
-	@Override
-	public void onSaveInstanceState(Bundle outState) {
-		super.onSaveInstanceState(outState);
-
-		outState.putBoolean(ONSCREEN_CALCULATOR_ENABLED, onscreenCalculatorEnabled);
 	}
 
 	@Nullable
-	CheckBox getOnscreenCalculatorCheckbox() {
+	CheckBox getCheckbox() {
-		return onscreenCalculatorCheckbox;
+		return checkbox;
+	}
+
+	@Override
+	public void onCheckedChanged(CompoundButton buttonView, boolean checked) {
+		Preferences.OnscreenCalculator.showAppIcon.putPreference(getPreferences(), checked);
 	}
 }
 

android-app/src/main/java/org/solovyev/android/calculator/wizard/WizardActivity.java

@@ -6,7 +6,6 @@ import android.os.Bundle;
 import android.support.v4.app.Fragment;
 import android.support.v4.app.FragmentManager;
 import android.support.v4.app.FragmentStatePagerAdapter;
-import android.support.v4.view.PagerAdapter;
 import android.support.v4.view.ViewPager;
 import com.viewpagerindicator.PageIndicator;
 import org.solovyev.android.calculator.BaseActivity;
@@ -25,7 +24,7 @@ public class WizardActivity extends BaseActivity implements WizardsAware {
 	private ViewPager pager;
 
 	@Nonnull
-	private PagerAdapter pagerAdapter;
+	private WizardPagerAdapter pagerAdapter;
 
 	@Nonnull
 	private Wizards wizards = CalculatorApplication.getInstance().getWizards();
@@ -147,6 +146,8 @@ public class WizardActivity extends BaseActivity implements WizardsAware {
 	public void goNext() {
 		final int position = pager.getCurrentItem();
 		if (position < pagerAdapter.getCount() - 1) {
+			final WizardFragment fragment = (WizardFragment) pagerAdapter.getItem(position);
+			fragment.onNext();
 			pager.setCurrentItem(position + 1, true);
 		}
 	}
@@ -154,6 +155,8 @@ public class WizardActivity extends BaseActivity implements WizardsAware {
 	public void goPrev() {
 		final int position = pager.getCurrentItem();
 		if (position > 0) {
+			final WizardFragment fragment = (WizardFragment) pagerAdapter.getItem(position);
+			fragment.onPrev();
 			pager.setCurrentItem(position - 1, true);
 		}
 	}

android-app/src/main/java/org/solovyev/android/calculator/wizard/WizardArrayAdapter.java

@@ -0,0 +1,24 @@
+package org.solovyev.android.calculator.wizard;
+
+import android.content.Context;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ArrayAdapter;
+import android.widget.TextView;
+
+final class WizardArrayAdapter extends ArrayAdapter<String> {
+
+	public WizardArrayAdapter(Context context, int array) {
+		super(context, android.R.layout.simple_spinner_item, context.getResources().getStringArray(array));
+		setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
+	}
+
+	@Override
+	public View getView(int position, View convertView, ViewGroup parent) {
+		final View view = super.getView(position, convertView, parent);
+		if (view instanceof TextView) {
+			((TextView) view).setTextAppearance(getContext(), android.R.style.TextAppearance_Large);
+		}
+		return view;
+	}
+}

android-app/src/main/java/org/solovyev/android/calculator/wizard/WizardFragment.java

@@ -115,4 +115,19 @@ public abstract class WizardFragment extends Fragment implements View.OnClickLis
 	private WizardActivity getWizardActivity() {
 		return (WizardActivity) getActivity();
 	}
+
+	public WizardStep getStep() {
+		if (step == null) {
+			step = findStepByClassName();
+		}
+		return step;
+	}
+
+	public void onNext() {
+		getStep().onNext(this);
+	}
+
+	public void onPrev() {
+		getStep().onPrev(this);
+	}
 }

android-app/src/main/java/org/solovyev/android/wizard/WizardUi.java

@@ -3,7 +3,6 @@ package org.solovyev.android.wizard;
 import android.content.Context;
 import android.content.Intent;
 import android.os.Bundle;
-import android.support.v4.app.Fragment;
 import android.support.v4.app.FragmentActivity;
 import android.support.v4.app.FragmentManager;
 
@@ -75,29 +74,11 @@ public class WizardUi<A extends FragmentActivity> {
 		activity.finish();
 	}
 
-	protected final boolean tryGoPrev() {
-		if (step == null) {
-			return true;
-		} else {
-			final Fragment fragment = getFragmentManager().findFragmentByTag(step.getFragmentTag());
-			return fragment == null || step.onPrev(fragment);
-		}
-	}
-
 	@Nonnull
 	protected final FragmentManager getFragmentManager() {
 		return activity.getSupportFragmentManager();
 	}
 
-	protected final boolean tryGoNext() {
-		if (step == null) {
-			return true;
-		} else {
-			final Fragment fragment = getFragmentManager().findFragmentByTag(step.getFragmentTag());
-			return fragment == null || step.onNext(fragment);
-		}
-	}
-
 	public void onSaveInstanceState(@Nonnull Bundle out) {
 		out.putString(FLOW, wizard.getName());
 		out.putString(STEP, step.getName());

android-app/src/main/res/layout/cpp_wizard_step_choose_layout.xml

@@ -25,51 +25,27 @@
 <LinearLayout xmlns:a="http://schemas.android.com/apk/res/android"
 	a:layout_width="match_parent"
 	a:layout_height="match_parent"
-			  a:orientation="vertical">
+	a:orientation="vertical"
+	a:gravity="center">
 
-	<RadioGroup
+	<TextView
-			a:orientation="horizontal"
+		a:layout_width="wrap_content"
-			a:layout_width="match_parent"
 		a:layout_height="wrap_content"
-			a:gravity="center_vertical|top">
+		a:textAppearance="@android:style/TextAppearance.Large"
+		style="@style/WizardLabel"
+		a:text="Choose layout" />
 
-		<RadioButton
+	<Spinner
-				a:layout_width="0dp"
+		a:id="@+id/wizard_layout_spinner"
-				a:id="@+id/wizard_optimized_radiobutton"
+		a:layout_width="wrap_content"
-				a:layout_weight="1"
-				a:text="@string/cpp_wizard_layout_optimized"
-				a:layout_height="wrap_content"/>
-
-		<RadioButton
-				a:layout_width="0dp"
-				a:id="@+id/wizard_big_buttons_radiobutton"
-				a:layout_weight="1"
-				a:text="@string/cpp_wizard_layout_big_buttons"
-				a:layout_height="wrap_content"/>
-
-	</RadioGroup>
-
-	<LinearLayout
-			a:layout_width="match_parent"
 		a:layout_height="wrap_content"
-			a:orientation="horizontal">
+		style="@style/WizardLabel" />
 
 	<ImageView
-				a:layout_width="0dp"
+		a:id="@+id/wizard_layout_image"
-				a:layout_weight="1"
+		a:layout_width="wrap_content"
-				a:scaleType="centerInside"
+		a:layout_height="wrap_content"
-				a:layout_height="match_parent"
+		style="@style/WizardLabel.Last"
-				a:padding="10dp"
+		/>
-				a:src="@drawable/tablet_optimized"/>
-
-		<ImageView
-				a:layout_width="0dp"
-				a:layout_weight="1"
-				a:scaleType="centerInside"
-				a:layout_height="match_parent"
-				a:padding="10dp"
-				a:src="@drawable/tablet_big_buttons"/>
-
-	</LinearLayout>
 
 </LinearLayout>

android-app/src/main/res/values/arrays.xml

@@ -138,4 +138,9 @@
 		<item>@string/cpp_wizard_mode_simple</item>
 		<item>@string/cpp_wizard_mode_engineer</item>
 	</string-array>
+
+	<string-array name="cpp_layouts">
+		<item>@string/cpp_wizard_layout_big_buttons</item>
+		<item>@string/cpp_wizard_layout_optimized</item>
+	</string-array>
 </resources>

android-app/src/main/res/values/colors.xml

@@ -33,7 +33,7 @@
 	<color name="cpp_wizard_button_normal">#424242</color>
 	<color name="cpp_wizard_button_disabled">#616161</color>
 	<color name="cpp_wizard_button_pressed">#757575</color>
-	<color name="cpp_pane_background">#ff1f1f1f</color>
+	<color name="cpp_pane_background">#212121</color>
 	<color name="cpp_metro_button_dark">#ff000000</color>
 	<color name="cpp_metro_button">#212121</color>
 	<color name="cpp_metro_button_light">#393939</color>