drag button wizard step

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

@@ -0,0 +1,156 @@
+package org.solovyev.android.calculator.wizard;
+
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.MotionEvent;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.TextView;
+
+import java.util.Arrays;
+
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+
+import org.solovyev.android.calculator.R;
+import org.solovyev.android.view.drag.DirectionDragButton;
+import org.solovyev.android.view.drag.DragButton;
+import org.solovyev.android.view.drag.DragDirection;
+import org.solovyev.android.view.drag.SimpleOnDragListener;
+import org.solovyev.common.math.Point2d;
+
+import com.actionbarsherlock.app.SherlockFragment;
+
+public class DragButtonWizardStep extends SherlockFragment {
+
+	/*
+	**********************************************************************
+	*
+	*                           CONSTANTS
+	*
+	**********************************************************************
+	*/
+
+	private static final String ACTION = "action";
+
+	/*
+	**********************************************************************
+	*
+	*                           FIELDS
+	*
+	**********************************************************************
+	*/
+
+	@Nullable
+	private DirectionDragButton dragButton;
+
+	@Nullable
+	private TextView actionTextView;
+
+	private DragButtonAction action = DragButtonAction.center;
+
+	@Override
+	public void onCreate(Bundle savedInstanceState) {
+		super.onCreate(savedInstanceState);
+
+		if (savedInstanceState != null) {
+			action = (DragButtonAction) savedInstanceState.getSerializable(ACTION);
+		}
+	}
+
+	@Override
+	public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
+		return inflater.inflate(R.layout.cpp_wizard_step_drag_button, null);
+	}
+
+	@Override
+	public void onViewCreated(View root, Bundle savedInstanceState) {
+		super.onViewCreated(root, savedInstanceState);
+
+		dragButton = (DirectionDragButton) root.findViewById(R.id.wizard_dragbutton);
+		dragButton.setOnClickListener(new DragButtonOnClickListener());
+		dragButton.setOnDragListener(new SimpleOnDragListener(new DragButtonProcessor(), SimpleOnDragListener.getDefaultPreferences(getActivity())));
+		actionTextView = (TextView) root.findViewById(R.id.wizard_dragbutton_action_textview);
+
+		actionTextView.setText(action.actionTextResId);
+	}
+
+	@Override
+	public void onSaveInstanceState(Bundle outState) {
+		super.onSaveInstanceState(outState);
+
+		outState.putSerializable(ACTION, action);
+	}
+
+	/*
+	**********************************************************************
+	*
+	*                           STATIC/INNER
+	*
+	**********************************************************************
+	*/
+
+	private static enum DragButtonAction {
+		center(R.string.cpp_wizard_dragbutton_action_center, null),
+		up(R.string.cpp_wizard_dragbutton_action_up, DragDirection.up),
+		left(R.string.cpp_wizard_dragbutton_action_left, DragDirection.left),
+		down(R.string.cpp_wizard_dragbutton_action_down, DragDirection.down);
+
+		private final int actionTextResId;
+
+		@Nullable
+		private final DragDirection dragDirection;
+
+		DragButtonAction(int actionTextResId, @Nullable DragDirection dragDirection) {
+			this.actionTextResId = actionTextResId;
+			this.dragDirection = dragDirection;
+		}
+
+		@Nullable
+		DragButtonAction getNextAction() {
+			final DragButtonAction[] values = values();
+			final int position = Arrays.binarySearch(values, this);
+			if (position < values.length - 1) {
+				return values[position + 1];
+			} else {
+				return values[0];
+			}
+		}
+	}
+
+	private class DragButtonOnClickListener implements View.OnClickListener {
+		@Override
+		public void onClick(View v) {
+			if(action == DragButtonAction.center) {
+				setNextAction();
+			}
+		}
+	}
+
+	private void setNextAction() {
+		setAction(action.getNextAction());
+	}
+
+	private class DragButtonProcessor implements SimpleOnDragListener.DragProcessor {
+		@Override
+		public boolean processDragEvent(@Nonnull DragDirection dragDirection,
+										@Nonnull DragButton dragButton,
+										@Nonnull Point2d startPoint2d,
+										@Nonnull MotionEvent motionEvent) {
+			if(action.dragDirection == dragDirection) {
+				setNextAction();
+				return true;
+			}
+			return false;
+		}
+	}
+
+	private void setAction(DragButtonAction action) {
+		if (this.action != action) {
+			this.action = action;
+			if (actionTextView != null) {
+				actionTextView.setText(this.action.actionTextResId);
+			}
+		}
+	}
+}

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

@@ -9,7 +9,6 @@ import android.support.v4.app.Fragment;
 import org.solovyev.android.App;
 import org.solovyev.android.Views;
 import org.solovyev.android.calculator.CalculatorApplication;
-import org.solovyev.android.calculator.CalculatorLocator;
 import org.solovyev.android.calculator.CalculatorPreferences;
 
 import javax.annotation.Nonnull;
@@ -133,6 +132,24 @@ enum WizardStep {
 			bundle.putSerializable(ONSCREEN_CALCULATOR_ENABLED, CalculatorPreferences.OnscreenCalculator.showAppIcon.getPreference(preferences));
 			return bundle;
 		}
+	},
+
+	drag_button_step(DragButtonWizardStep.class) {
+		@Override
+		boolean onNext(@Nonnull Fragment fragment) {
+			return true;
+		}
+
+		@Override
+		boolean onPrev(@Nonnull Fragment fragment) {
+			return true;
+		}
+
+		@Nullable
+		@Override
+		Bundle getFragmentArgs() {
+			return null;
+		}
 	};
 
 	@Nonnull