Magic Cube

///////////////////////////////////////////////////////////////////////////////////////////////////

// Copyright 2023 Leszek Koltunski                                                               //

//                                                                                               //

// This file is part of Magic Cube.                                                              //

//                                                                                               //

// Magic Cube is proprietary software licensed under an EULA which you should have received      //

// along with the code. If not, check https://distorted.org/magic/License-Magic-Cube.html        //

///////////////////////////////////////////////////////////////////////////////////////////////////

package org.distorted.main;

import android.content.Context;

import android.content.res.Resources;

import android.os.Build;

import android.util.TypedValue;

import android.view.Gravity;

import android.view.LayoutInflater;

import android.view.View;

import android.widget.AdapterView;

import android.widget.ArrayAdapter;

import android.widget.ListPopupWindow;

import android.widget.PopupWindow;

import android.widget.Spinner;

import android.widget.TextView;

import java.lang.ref.WeakReference;

import java.lang.reflect.Field;

///////////////////////////////////////////////////////////////////////////////////////////////////

public class MainSettingsPopup implements AdapterView.OnItemSelectedListener

  {

  public static final int SORT_CLASSIC    = 0;

  public static final int SORT_SHAPE      = 1;

  public static final int SORT_DIFFICULTY = 2;

  public static final int SORT_AUTHOR     = 3;

  public static final int SORT_YEAR       = 4;

  public static final int SORT_DEFAULT    = SORT_SHAPE;

  private static final float MENU_TITLE_SIZE= 0.070f;

  private static final float MENU_TEXT_SIZE = 0.060f;

  private static final int[] mLocation = new int[2];

  private final PopupWindow mPopup;

  private final WeakReference<MainActivity> mAct;

  private int mCurrMethod;

  private String[] mSortNames;

///////////////////////////////////////////////////////////////////////////////////////////////////

// this is supposed to prevent showing the navigational bar when we show the drop down list,

// but it doesn't quite work... At least not in the emulator.

// see https://gist.github.com/kakajika/a236ba721a5c0ad3c1446e16a7423a63

//

// EDIT: the bar does not appear on API 34 without the need to call this method. Must have been

// fixed by Android developers.

  public static void avoidSpinnerDropdownFocus(Spinner spinner)

    {

    try

      {

      Field listPopupField = Spinner.class.getDeclaredField("mPopup");

      listPopupField.setAccessible(true);

      Object listPopup = listPopupField.get(spinner);

      if( listPopup instanceof ListPopupWindow )

        {

        Field popupField = ListPopupWindow.class.getDeclaredField("mPopup");

        popupField.setAccessible(true);

        Object popup = popupField.get((ListPopupWindow) listPopup);

        if( popup instanceof PopupWindow )

          {

          ((PopupWindow) popup).setFocusable(false);

          }

        }

      }

    catch (NoSuchFieldException | IllegalAccessException ignored)

      {

      }

    }

///////////////////////////////////////////////////////////////////////////////////////////////////

  MainSettingsPopup(MainActivity act, int sortMethod, int width, int height)

    {

    mAct = new WeakReference<>(act);

    // due to bugs in Android API <=25, a Spinner inside a PopupWindow will crash once you click on it.

    // solution: on those APIs, use a special Spinner in dialog mode (this does not crash)

    int id = android.os.Build.VERSION.SDK_INT <= 25 ? R.layout.settings_popup_android25 : R.layout.settings_popup;

    LayoutInflater layoutInflater = (LayoutInflater) act.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

    final View layout = layoutInflater.inflate(id, null);

    mPopup = new PopupWindow(act);

    mPopup.setContentView(layout);

    mPopup.setFocusable(true);

    int titleSize = (int)(MENU_TITLE_SIZE*width);

    int textSize  = (int)(MENU_TEXT_SIZE*width);

    TextView title = layout.findViewById(R.id.sortTitle);

    title.setTextSize(TypedValue.COMPLEX_UNIT_PX, titleSize);

    TextView text = layout.findViewById(R.id.sortText);

    text.setTextSize(TypedValue.COMPLEX_UNIT_PX, textSize);

    Spinner actSpinner  = layout.findViewById(R.id.sortMethod);

    actSpinner.setOnItemSelectedListener(this);

    mCurrMethod = sortMethod;

    buildSortOptions(act);

    ArrayAdapter<String> actAdapter = new ArrayAdapter<>(act, android.R.layout.simple_spinner_item, mSortNames);

    actAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

    actSpinner.setAdapter(actAdapter);

    if( sortMethod>=0 && sortMethod<mSortNames.length ) actSpinner.setSelection(sortMethod);

    }

///////////////////////////////////////////////////////////////////////////////////////////////////

  private void buildSortOptions(MainActivity act)

    {

    Resources res = act.getResources();

    mSortNames = new String[5];

    mSortNames[0] = res.getString(R.string.sort_classic);

    mSortNames[1] = res.getString(R.string.sort_shape);

    mSortNames[2] = res.getString(R.string.sort_difficulty);

    mSortNames[3] = res.getString(R.string.sort_author);

    mSortNames[4] = res.getString(R.string.sort_year);

    }

///////////////////////////////////////////////////////////////////////////////////////////////////

// work around lame bugs in Android's version <= 10 pop-up and split-screen modes

  public void displayPopup(MainActivity act, View view, int w, int h, int xoff, int yoff)

    {

    View v = mPopup.getContentView();

    v.setSystemUiVisibility(MainActivity.FLAGS);

    View topLayout = act.findViewById(R.id.relativeLayout);

    boolean isFullScreen;

    if( topLayout!=null )

      {

      topLayout.getLocationOnScreen(mLocation);

      isFullScreen = (mLocation[1]==0);

      }

    else

      {

      isFullScreen = true;

      }

    try

      {

      // if on Android 11 or we are fullscreen

      if (Build.VERSION_CODES.R<=Build.VERSION.SDK_INT || isFullScreen )

        {

        mPopup.showAsDropDown(view, xoff, yoff, Gravity.CENTER);

        mPopup.update(view, w, h);

        }

      else  // Android 10 or below in pop-up mode or split-screen mode

        {

        view.getLocationOnScreen(mLocation);

        int width  = view.getWidth();

        int height = view.getHeight();

        int x = mLocation[0]+(width-w)/2;

        int y = mLocation[1]+height+yoff;

        mPopup.showAsDropDown(view);

        mPopup.update(x,y,w,h);

        }

      }

    catch( IllegalArgumentException iae )

      {

      // ignore, this means window is 'not attached to window manager' -

      // which most probably is because we are already exiting the app.

      }

    }

///////////////////////////////////////////////////////////////////////////////////////////////////

  public void onItemSelected(AdapterView<?> parent, View view, int pos, long id)

    {

    if( parent.getId()==R.id.sortMethod && mCurrMethod!=pos )

      {

      mCurrMethod = pos;

      MainActivity act = mAct.get();

      act.sortObjectsBy(pos);

      mPopup.dismiss();

      }

    }

///////////////////////////////////////////////////////////////////////////////////////////////////

  public void onNothingSelected(AdapterView<?> parent)

    {

    }

  }