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package com.rajasharan.widget;
import android.app.AlertDialog;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;
import android.widget.TextView;
import de.bjusystems.vdrmanager.R;
/**
* Created by rajasharan on 8/28/15.
*/
public class SearchableSpinner extends ViewGroup implements TextWatcher, View.OnClickListener {
private static final String TAG = "Searchable_Spinner";
private CharSequence [] mList;
private TextView mText;
private TextView mDropdownArrow;
private AlertDialog mDialog;
private RecyclerDropdown mRecycler;
private OnSelectionChangeListener mListener;
public SearchableSpinner(Context context) {
this(context, null);
}
public SearchableSpinner(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public SearchableSpinner(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init(context, attrs);
}
private void init(Context context, AttributeSet attrs) {
mText = new TextView(context);
mText.setTextColor(Color.BLACK);
mText.setLayoutParams(generateDefaultLayoutParams());
mDropdownArrow = new TextView(context);
mDropdownArrow.setText("\u25BC");
mDropdownArrow.setLayoutParams(generateDefaultLayoutParams());
TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.SearchableSpinner);
setList(a.getTextArray(R.styleable.SearchableSpinner_list));
a.recycle();
int [] paddingAttrs = new int[] {
android.R.attr.padding,
android.R.attr.paddingLeft, android.R.attr.paddingTop,
android.R.attr.paddingRight, android.R.attr.paddingBottom};
a = context.obtainStyledAttributes(attrs, paddingAttrs);
for (int i=0; i<paddingAttrs.length; i++) {
int temp = a.hasValue(i) ? setPadding(a.getDimensionPixelSize(i, -1), i) : -1;
}
}
public void setList(CharSequence [] list) {
mList = list;
if (mList != null && mList.length > 0) {
mText.setText(mList[0]);
mDialog = createDialog(getContext());
}
}
private int setPadding(int p, int sideIndex) {
if (p != -1) {
switch (sideIndex) {
case 0:
mText.setPadding(p, p, p, p);
mDropdownArrow.setPadding(p, p, p, p);
break;
case 1:
mText.setPadding(p, getPaddingTop(), getPaddingRight(), getPaddingBottom());
mDropdownArrow.setPadding(p, getPaddingTop(), getPaddingRight(), getPaddingBottom());
break;
case 2:
mText.setPadding(getPaddingLeft(), p, getPaddingRight(), getPaddingBottom());
mDropdownArrow.setPadding(getPaddingLeft(), p, getPaddingRight(), getPaddingBottom());
break;
case 3:
mText.setPadding(getPaddingLeft(), getPaddingTop(), p, getPaddingBottom());
mDropdownArrow.setPadding(getPaddingLeft(), getPaddingTop(), p, getPaddingBottom());
break;
case 4:
mText.setPadding(getPaddingLeft(), getPaddingTop(), getPaddingRight(), p);
mDropdownArrow.setPadding(getPaddingLeft(), getPaddingTop(), getPaddingRight(), p);
break;
}
}
return -1;
}
private AlertDialog createDialog(Context context) {
AlertDialog.Builder builder = new AlertDialog.Builder(context);
LayoutInflater inflater = LayoutInflater.from(context);
View view = inflater.inflate(R.layout.dialog_dropdown, null);
EditText filter = (EditText) view.findViewById(R.id.filter);
filter.setHint("\uD83D\uDD0D search");
filter.addTextChangedListener(this);
mRecycler = (RecyclerDropdown) view.findViewById(R.id.list);
mRecycler.setOnClickListener(this);
mRecycler.setDropdownList(mList);
mRecycler.scrollToPosition(mList.length/2);
builder.setView(view);
return builder.create();
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
mText.measure(0, 0);
mDropdownArrow.measure(0, 0);
int w = MeasureSpec.getSize(widthMeasureSpec);
int h = MeasureSpec.getSize(heightMeasureSpec);
int desiredWidth = Math.min(mText.getMeasuredWidth() + mDropdownArrow.getMeasuredWidth(), w);
int desiredHeight = Math.min(mText.getMeasuredHeight(), h);
//Log.d(TAG, String.format("onMeasure: (%s, %s)", desiredWidth, desiredHeight));
widthMeasureSpec = MeasureSpec.makeMeasureSpec(desiredWidth, MeasureSpec.EXACTLY);
heightMeasureSpec = MeasureSpec.makeMeasureSpec(desiredHeight, MeasureSpec.EXACTLY);
setMeasuredDimension(widthMeasureSpec, heightMeasureSpec);
}
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
mText.layout(l, t, l + mText.getMeasuredWidth(), b);
mDropdownArrow.layout(l + mText.getMeasuredWidth(), t, r, b);
}
@Override
protected void dispatchDraw(Canvas canvas) {
mText.draw(canvas);
int save = canvas.save();
canvas.translate(mText.getWidth(), 0);
mDropdownArrow.draw(canvas);
canvas.restoreToCount(save);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
switch (event.getActionMasked()) {
case MotionEvent.ACTION_UP:
if (mDialog != null && !mDialog.isShowing()) {
mDialog.show();
}
}
return true;
}
private void updateSelection(CharSequence str) {
mText.setText(str);
requestLayout();
invalidate();
if (mListener != null) {
mListener.onSelectionChanged(str.toString());
}
}
public String getSelectedItem() {
if (mText != null) {
return mText.getText().toString();
}
return null;
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
mRecycler.filter(s.toString());
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void afterTextChanged(Editable s) {
}
@Override
public void onClick(View v) {
if (mDialog.isShowing()) {
mDialog.dismiss();
}
updateSelection(((TextView)v).getText());
}
public void setOnSelectionChangeListener(OnSelectionChangeListener listener) {
mListener = listener;
}
public interface OnSelectionChangeListener {
public void onSelectionChanged(String selection);
}
}
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