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package de.danoeh.antennapod.view;
import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewGroup;
import android.widget.LinearLayout;
import android.widget.RadioButton;
import java.util.ArrayList;
/**
* An alternative to {@link android.widget.RadioGroup} that allows to nest children.
* Basend on https://stackoverflow.com/a/14309274.
*/
public class RecursiveRadioGroup extends LinearLayout {
private final ArrayList<RadioButton> radioButtons = new ArrayList<>();
private RadioButton checkedButton = null;
public RecursiveRadioGroup(Context context) {
super(context);
}
public RecursiveRadioGroup(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public RecursiveRadioGroup(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
@Override
public void addView(View child, int index, ViewGroup.LayoutParams params) {
super.addView(child, index, params);
parseChild(child);
}
public void parseChild(final View child) {
if (child instanceof RadioButton) {
RadioButton button = (RadioButton) child;
radioButtons.add(button);
button.setOnCheckedChangeListener((buttonView, isChecked) -> {
if (!isChecked) {
return;
}
checkedButton = (RadioButton) buttonView;
for (RadioButton view : radioButtons) {
if (view != buttonView) {
view.setChecked(false);
}
}
});
} else if (child instanceof ViewGroup) {
parseChildren((ViewGroup) child);
}
}
public void parseChildren(final ViewGroup child) {
for (int i = 0; i < child.getChildCount(); i++) {
parseChild(child.getChildAt(i));
}
}
public RadioButton getCheckedButton() {
return checkedButton;
}
}
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