com.waz.zclient.ui.utils.ColorUtils.java Source code

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Here is the source code for com.waz.zclient.ui.utils.ColorUtils.java

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/**
 * Wire
 * Copyright (C) 2016 Wire Swiss GmbH
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.waz.zclient.ui.utils;

import android.content.res.ColorStateList;
import android.graphics.Color;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.GradientDrawable;
import android.graphics.drawable.StateListDrawable;

public class ColorUtils {
    private static final int PRESSED_ALPHA = 180;

    private ColorUtils() {
    }

    public static int injectAlpha(int alpha, int color) {
        return android.support.v4.graphics.ColorUtils.setAlphaComponent(color, alpha);
    }

    public static int injectAlpha(float alpha, int color) {
        return android.support.v4.graphics.ColorUtils.setAlphaComponent(color, (int) (255 * alpha));
    }

    public static ColorStateList createButtonTextColorStateList(int[] colors) {
        int[][] states = { { android.R.attr.state_pressed }, { android.R.attr.state_focused },
                { android.R.attr.state_enabled }, { -android.R.attr.state_enabled } };
        return new ColorStateList(states, colors);
    }

    public static int adjustBrightness(int color, float percentage) {
        return Color.argb(Color.alpha(color), (int) (Color.red(color) * percentage),
                (int) (Color.green(color) * percentage), (int) (Color.blue(color) * percentage));
    }

    public static int getPressColor(int alpha, int borderColor) {
        int borderColorPressed;
        if (Color.alpha(borderColor) == 0) {
            borderColorPressed = borderColor;
        } else {
            borderColorPressed = ColorUtils.injectAlpha(alpha, borderColor);
        }
        return borderColorPressed;
    }

    public static Drawable getButtonBackground(int borderColor, int fillColor, int strokeWidth, int cornerRadius) {
        int fillColorPressed = getPressColor(PRESSED_ALPHA, fillColor);
        int borderColorPressed = getPressColor(PRESSED_ALPHA, borderColor);

        GradientDrawable gradientDrawablePressed = new GradientDrawable(GradientDrawable.Orientation.TOP_BOTTOM,
                new int[] { fillColorPressed, fillColorPressed });
        gradientDrawablePressed.setStroke(strokeWidth, borderColorPressed);
        gradientDrawablePressed.setCornerRadius(cornerRadius);

        GradientDrawable gradientDrawable = new GradientDrawable(GradientDrawable.Orientation.TOP_BOTTOM,
                new int[] { fillColor, fillColor });
        gradientDrawable.setStroke(strokeWidth, borderColor);
        gradientDrawable.setCornerRadius(cornerRadius);

        StateListDrawable states = new StateListDrawable();
        states.addState(new int[] { android.R.attr.state_pressed }, gradientDrawablePressed);
        states.addState(new int[] { android.R.attr.state_focused }, gradientDrawablePressed);
        states.addState(new int[] {}, gradientDrawable);

        return states;
    }
}