| /* |
| * Copyright (C) 2013 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.colorpicker; |
| |
| import android.graphics.Color; |
| import android.graphics.PorterDuff; |
| import android.graphics.drawable.Drawable; |
| import android.graphics.drawable.LayerDrawable; |
| |
| /** |
| * A drawable which sets its color filter to a color specified by the user, and changes to a |
| * slightly darker color when pressed or focused. |
| */ |
| public class ColorStateDrawable extends LayerDrawable { |
| |
| private static final float PRESSED_STATE_MULTIPLIER = 0.70f; |
| |
| private int mColor; |
| |
| public ColorStateDrawable(Drawable[] layers, int color) { |
| super(layers); |
| mColor = color; |
| } |
| |
| @Override |
| protected boolean onStateChange(int[] states) { |
| boolean pressedOrFocused = false; |
| for (int state : states) { |
| if (state == android.R.attr.state_pressed || state == android.R.attr.state_focused) { |
| pressedOrFocused = true; |
| break; |
| } |
| } |
| |
| if (pressedOrFocused) { |
| super.setColorFilter(getPressedColor(mColor), PorterDuff.Mode.SRC_ATOP); |
| } else { |
| super.setColorFilter(mColor, PorterDuff.Mode.SRC_ATOP); |
| } |
| |
| return super.onStateChange(states); |
| } |
| |
| /** |
| * Given a particular color, adjusts its value by a multiplier. |
| */ |
| private static int getPressedColor(int color) { |
| float[] hsv = new float[3]; |
| Color.colorToHSV(color, hsv); |
| hsv[2] = hsv[2] * PRESSED_STATE_MULTIPLIER; |
| return Color.HSVToColor(hsv); |
| } |
| |
| @Override |
| public boolean isStateful() { |
| return true; |
| } |
| } |