package com.putuguna.fragmentdinamis;

import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutCompat;
import android.widget.LinearLayout;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity implements ViewPager.OnPageChangeListener {

    private LinearLayout indicator;
    private int mDotCount;
    private LinearLayout[] mDots;
    private ViewPager viewPager;
    private List<String> listItem = new ArrayList<>();
    private FragmentAdapter fragmentAdapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        indicator = (LinearLayout) findViewById(R.id.indicators);
        viewPager = (ViewPager) findViewById(R.id.viewPager_itemList);

        setData();
    }

    private void setData(){
        listItem.add("Ini adalah fragment 1");
        listItem.add("Ini adalah fragment 2");
        listItem.add("Ini adalah fragment 3");
        listItem.add("Ini adalah fragment 4");
        listItem.add("Ini adalah fragment 5");

        fragmentAdapter = new FragmentAdapter(this, getSupportFragmentManager(), listItem);
        viewPager.setAdapter(fragmentAdapter);
        viewPager.setCurrentItem(0);
        viewPager.setOnPageChangeListener(this);
        setUiPageViewController();

    }

    private void setUiPageViewController(){
        mDotCount = fragmentAdapter.getCount();
        mDots = new LinearLayout[mDotCount];

        for(int i=0; i<mDotCount; i++){
            mDots[i] = new LinearLayout(this);
            mDots[i].setBackgroundResource(R.drawable.nonselected_item);

            LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
                    LinearLayoutCompat.LayoutParams.WRAP_CONTENT,
                    LinearLayout.LayoutParams.WRAP_CONTENT
            );

            params.setMargins(4,0,4,0);
            indicator.addView(mDots[i],params);
            mDots[0].setBackgroundResource(R.drawable.selected_item);
        }
    }

    @Override
    public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

    }

    @Override
    public void onPageSelected(int position) {
        for (int i=0; i<mDotCount; i++){
            mDots[i].setBackgroundResource(R.drawable.nonselected_item);
        }
        mDots[position].setBackgroundResource(R.drawable.selected_item);
    }

    @Override
    public void onPageScrollStateChanged(int state) {

    }
}