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package org.fox.ttrss.util;
import android.content.Context;
import android.content.SharedPreferences;
import android.preference.PreferenceManager;
import android.util.AttributeSet;
import android.view.View;
import com.google.android.material.appbar.AppBarLayout;
import com.google.android.material.floatingactionbutton.FloatingActionButton;
import java.util.List;
import androidx.annotation.NonNull;
import androidx.coordinatorlayout.widget.CoordinatorLayout;
import androidx.core.view.ViewCompat;
public class DetailActivityScrollingViewBehavior extends AppBarLayout.ScrollingViewBehavior {
private SharedPreferences m_prefs;
public DetailActivityScrollingViewBehavior(Context context, AttributeSet attrs) {
super(context, attrs);
m_prefs = PreferenceManager
.getDefaultSharedPreferences(context);
}
@Override
public boolean layoutDependsOn(CoordinatorLayout parent, View child, View dependency) {
return super.layoutDependsOn(parent, child, dependency) ||
dependency instanceof FloatingActionButton;
}
@Override
public boolean onStartNestedScroll(@NonNull CoordinatorLayout coordinatorLayout,
@NonNull View child, @NonNull View directTargetChild,
@NonNull View target, int axes, int type) {
// Ensure we react to vertical scrolling
return axes == ViewCompat.SCROLL_AXIS_VERTICAL ||
super.onStartNestedScroll(coordinatorLayout, child, directTargetChild, target, axes, type);
}
@Override
public void onNestedPreScroll(@NonNull CoordinatorLayout coordinatorLayout,
@NonNull View child, @NonNull View target, int dx, int dy,
@NonNull int[] consumed, int type) {
super.onNestedPreScroll(coordinatorLayout, child, target, dx, dy, consumed, type);
if (m_prefs.getBoolean("enable_article_fab", true)) {
if (dy > 0) {
// User scrolled down -> hide the FAB
List<View> dependencies = coordinatorLayout.getDependencies(child);
for (View view : dependencies) {
if (view instanceof FloatingActionButton) {
((FloatingActionButton) view).hide();
}
}
} else if (dy < 0) {
// User scrolled up -> show the FAB
List<View> dependencies = coordinatorLayout.getDependencies(child);
for (View view : dependencies) {
if (view instanceof FloatingActionButton) {
((FloatingActionButton) view).show();
}
}
}
}
}
}
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