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package it.niedermann.nextcloud.deck.ui.card.attachments;
import static android.view.View.GONE;
import static android.view.View.VISIBLE;
import static com.google.android.material.bottomsheet.BottomSheetBehavior.STATE_HIDDEN;
import android.content.Context;
import android.graphics.Color;
import android.view.View;
import androidx.activity.OnBackPressedCallback;
import androidx.annotation.ColorInt;
import androidx.annotation.DimenRes;
import androidx.annotation.NonNull;
import androidx.annotation.Px;
import androidx.core.content.ContextCompat;
import com.google.android.material.animation.ArgbEvaluatorCompat;
import com.google.android.material.bottomnavigation.BottomNavigationView;
import com.google.android.material.bottomsheet.BottomSheetBehavior;
import com.google.android.material.floatingactionbutton.FloatingActionButton;
public class CardAttachmentsBottomsheetBehaviorCallback extends BottomSheetBehavior.BottomSheetCallback {
@NonNull
private final OnBackPressedCallback backPressedCallback;
@NonNull
private final FloatingActionButton fab;
@NonNull
private final View pickerBackdrop;
@NonNull
private final BottomNavigationView bottomNavigation;
@ColorInt
private final int backdropColorExpanded;
@ColorInt
private final int backdropColorCollapsed;
@Px
private final int bottomNavigationHeight;
private float lastOffset = -1;
public CardAttachmentsBottomsheetBehaviorCallback(@NonNull Context context,
@NonNull OnBackPressedCallback backPressedCallback,
@NonNull FloatingActionButton fab,
@NonNull View pickerBackdrop,
@NonNull BottomNavigationView bottomNavigation,
@DimenRes int bottomNavigationHeight
) {
this.backPressedCallback = backPressedCallback;
this.fab = fab;
this.pickerBackdrop = pickerBackdrop;
this.bottomNavigation = bottomNavigation;
final var color = ContextCompat.getColor(context, android.R.color.black);
this.backdropColorExpanded = Color.argb(127, Color.red(color), Color.green(color), Color.blue(color));
this.backdropColorCollapsed = ContextCompat.getColor(context, android.R.color.transparent);
this.bottomNavigationHeight = context.getResources().getDimensionPixelSize(bottomNavigationHeight);
}
@Override
public void onStateChanged(@NonNull View bottomSheet, int newState) {
if (newState == STATE_HIDDEN) {
backPressedCallback.setEnabled(false);
if (pickerBackdrop.getVisibility() != GONE) {
pickerBackdrop.setVisibility(GONE);
}
} else if (pickerBackdrop.getVisibility() != VISIBLE) {
pickerBackdrop.setVisibility(VISIBLE);
}
}
@Override
public void onSlide(@NonNull View bottomSheet, float slideOffset) {
if (slideOffset <= 0) {
final float bottomSheetPercentageShown = slideOffset * -1;
pickerBackdrop.setBackgroundColor(ArgbEvaluatorCompat.getInstance().evaluate(bottomSheetPercentageShown, backdropColorExpanded, backdropColorCollapsed));
bottomNavigation.setTranslationY(bottomSheetPercentageShown * bottomNavigationHeight);
if (slideOffset <= lastOffset && slideOffset != 0) {
fab.show();
} else {
fab.hide();
}
}
lastOffset = slideOffset;
}
}
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