FollowMeButton.java

Go to the documentation of this file.

package com.navigine.view.widgets;
 
import android.content.Context;
import android.content.res.ColorStateList;
import android.graphics.Color;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.GradientDrawable;
import android.graphics.drawable.ShapeDrawable;
import android.graphics.drawable.shapes.RoundRectShape;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.AccelerateDecelerateInterpolator;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.TextView;
 
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
 
import com.navigine.R;
import com.navigine.view.DefaultNavigationViewConfig;

public class FollowMeButton extends FrameLayout {

    public interface OnPressedListener {
        void onPressed(boolean following);
    }
 
    private OnPressedListener onPressedListener;
    private ImageView arrow;
    private boolean following = false;
    private FollowMeButtonConfig config;

    public FollowMeButton(@NonNull Context context, OnPressedListener onPressed) {
        this(context, onPressed, null);
    }

    public FollowMeButton(@NonNull Context context, OnPressedListener onPressed,
                         @Nullable FollowMeButtonConfig config) {
        super(context);
        this.onPressedListener = onPressed;
        this.config = config;
        setupUI();
    }
 
    private void setupUI() {
        setBackground(createFollowButtonBackground());
        setElevation(dpToPx((int) WidgetStyles.SHADOW_ELEVATION));
        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.P) {
            setOutlineAmbientShadowColor(WidgetStyles.SHADOW_COLOR);
            setOutlineSpotShadowColor(WidgetStyles.SHADOW_COLOR);
        }
        setOnClickListener(v -> followMePressed());
        setClickable(true);
        setFocusable(true);
 
        FollowMeButtonConfig c = config != null ? config : FollowMeButtonConfig.defaultConfig();
        arrow = new ImageView(getContext());
        Drawable icon = c.getFollowMeIcon() != null ? c.getFollowMeIcon() : null;
        if (icon != null) {
            arrow.setImageDrawable(icon);
        } else {
            arrow.setImageResource(R.drawable.navigine_follow_me);
        }
        int tintColor = c.getTextColor() != null ? c.getTextColor() : WidgetStyles.BASE_BLACK;
        arrow.setImageTintList(ColorStateList.valueOf(tintColor));
 
        FrameLayout.LayoutParams labelLp = new FrameLayout.LayoutParams(
                ViewGroup.LayoutParams.MATCH_PARENT,
                ViewGroup.LayoutParams.MATCH_PARENT
        );
        addView(arrow, labelLp);
        arrow.setScaleType(ImageView.ScaleType.CENTER_INSIDE);
        arrow.setAdjustViewBounds(true);
        arrow.setPadding(dpToPx(8), dpToPx(8), dpToPx(8), dpToPx(8));
 
        updateAppearance();
    }
 
    private ShapeDrawable createFollowButtonBackground() {
        FollowMeButtonConfig c = config != null ? config : FollowMeButtonConfig.defaultConfig();
        int color = c.getButtonBackgroundColor() != null ? c.getButtonBackgroundColor() : WidgetStyles.BUTTON_BACKGROUND_COLOR;
        float radius = dpToPx((int) WidgetStyles.BORDER_RADIUS);
        float[] radii = new float[]{radius, radius, radius, radius, radius, radius, radius, radius};
 
        ShapeDrawable drawable = new ShapeDrawable(new RoundRectShape(radii, null, null));
        drawable.getPaint().setAntiAlias(true);
        drawable.getPaint().setColor(color);
        return drawable;
    }

    public void applyConfig(@Nullable FollowMeButtonConfig newConfig) {
        config = newConfig;
        updateAppearance();
    }

    public void updateAppearanceForFollowingState(boolean isFollowing) {
        this.following = isFollowing;
        updateAppearance();
    }

    public boolean isFollowing() {
        return following;
    }
 
    private void updateAppearance() {
        if (arrow == null) {
            return;
        }
 
        FollowMeButtonConfig c = config != null ? config : FollowMeButtonConfig.defaultConfig();
        int accentColor = c.getAccentColor() != null ? c.getAccentColor() : WidgetStyles.BASE_BLUE;
        int textColor = c.getTextColor() != null ? c.getTextColor() : WidgetStyles.BASE_BLACK;
        int bgColor = c.getButtonBackgroundColor() != null ? c.getButtonBackgroundColor() : WidgetStyles.BUTTON_BACKGROUND_COLOR;
 
        if (following) {
            Drawable activeIcon = c.getFollowMeIconActive() != null ? c.getFollowMeIconActive() : null;
            if (activeIcon != null) {
                arrow.setImageDrawable(activeIcon);
            }
            arrow.setImageTintList(ColorStateList.valueOf(accentColor));
 
            GradientDrawable borderDrawable = new GradientDrawable();
            borderDrawable.setShape(GradientDrawable.RECTANGLE);
            borderDrawable.setCornerRadius(dpToPx((int) WidgetStyles.BORDER_RADIUS));
            borderDrawable.setColor(WidgetStyles.WHITE_BACKGROUND_COLOR);
            borderDrawable.setStroke(dpToPx((int) WidgetStyles.ACTIVE_BORDER_WIDTH), WidgetStyles.BORDER_COLOR);
            setBackground(borderDrawable);
        } else {
            Drawable icon = c.getFollowMeIcon() != null ? c.getFollowMeIcon() : null;
            if (icon != null) {
                arrow.setImageDrawable(icon);
            } else {
                arrow.setImageResource(R.drawable.navigine_follow_me);
            }
            arrow.setImageTintList(ColorStateList.valueOf(textColor));
 
            float radius = dpToPx((int) WidgetStyles.BORDER_RADIUS);
            ShapeDrawable background = new ShapeDrawable(new RoundRectShape(
                    new float[]{radius, radius, radius, radius, radius, radius, radius, radius},
                    null, null
            ));
            background.getPaint().setAntiAlias(true);
            background.getPaint().setColor(bgColor);
            setBackground(background);
        }
    }
 
    private void followMePressed() {
        following = !following;
        updateAppearance();
 
        if (onPressedListener != null) {
            onPressedListener.onPressed(following);
        }
    }
 
    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        FollowMeButtonConfig c = config != null ? config : FollowMeButtonConfig.defaultConfig();
        float widthDp = c.getButtonWidth() > 0 ? c.getButtonWidth() : WidgetStyles.STANDARD_BUTTON_WIDTH;
        float heightDp = c.getButtonHeight() > 0 ? c.getButtonHeight() : WidgetStyles.STANDARD_BUTTON_HEIGHT;
        int widthSpec = MeasureSpec.makeMeasureSpec(dpToPx((int) widthDp), MeasureSpec.EXACTLY);
        int heightSpec = MeasureSpec.makeMeasureSpec(dpToPx((int) heightDp), MeasureSpec.EXACTLY);
        super.onMeasure(widthSpec, heightSpec);
    }
 
    private int dpToPx(int dp) {
        return (int) (dp * getResources().getDisplayMetrics().density + 0.5f);
    }
}