Home | History | Annotate | Download | only in colorpicker 
      1 /*
      2  * Copyright (C) 2013 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.gallery3d.filtershow.colorpicker;
     18 
     19 import android.content.Context;
     20 import android.content.res.Resources;
     21 import android.graphics.Bitmap;
     22 import android.graphics.BitmapShader;
     23 import android.graphics.Canvas;
     24 import android.graphics.Color;
     25 import android.graphics.Paint;
     26 import android.graphics.Path;
     27 import android.graphics.Shader;
     28 import android.util.AttributeSet;
     29 import android.util.DisplayMetrics;
     30 import android.view.MotionEvent;
     31 import android.view.View;
     32 
     33 import com.android.gallery3d.R;
     34 
     35 import java.util.ArrayList;
     36 
     37 public class ColorCompareView extends View implements ColorListener {
     38 
     39     private float mRadius;
     40     private float mWidth;
     41     private Paint mBarPaint1;
     42     private Paint mOrigBarPaint1;
     43     private Paint mCheckPaint;
     44 
     45     private float mHeight;
     46 
     47     private int mBgcolor = 0;
     48 
     49     private float mBorder;
     50 
     51     private float[] mHSVO = new float[4];
     52     private float[] mOrigHSVO = new float[4];
     53     private Path mRegion;
     54     private Path mOrigRegion;
     55 
     56     public final static float BORDER_SIZE = 0;
     57     private int mCheckDim = 8;
     58 
     59     public ColorCompareView(Context ctx, AttributeSet attrs) {
     60         super(ctx, attrs);
     61         DisplayMetrics metrics = ctx.getResources().getDisplayMetrics();
     62         float mDpToPix = metrics.density;
     63         mBorder = BORDER_SIZE * mDpToPix;
     64         mBarPaint1 = new Paint();
     65         mOrigBarPaint1 = new Paint();
     66         Resources res = ctx.getResources();
     67         mCheckDim = res.getDimensionPixelSize(R.dimen.draw_color_check_dim);
     68         mBarPaint1.setStyle(Paint.Style.FILL);
     69         mOrigBarPaint1.setStyle(Paint.Style.FILL);
     70 
     71         makeCheckPaint();
     72     }
     73 
     74     private void makeCheckPaint() {
     75         int imgdim = mCheckDim * 2;
     76         int[] colors = new int[imgdim * imgdim];
     77         for (int i = 0; i < colors.length; i++) {
     78             int y = i / (imgdim * mCheckDim);
     79             int x = (i / mCheckDim) % 2;
     80             colors[i] = (x == y) ? 0xFFAAAAAA : 0xFF444444;
     81         }
     82         Bitmap bitmap = Bitmap.createBitmap(colors, imgdim, imgdim, Bitmap.Config.ARGB_8888);
     83         BitmapShader bs = new BitmapShader(bitmap, Shader.TileMode.REPEAT, Shader.TileMode.REPEAT);
     84         mCheckPaint = new Paint();
     85         mCheckPaint.setShader(bs);
     86     }
     87 
     88     public boolean onDown(MotionEvent e) {
     89         return true;
     90     }
     91 
     92     @Override
     93     public boolean onTouchEvent(MotionEvent event) {
     94         if (event.getAction() != MotionEvent.ACTION_UP) {
     95             return true;
     96         }
     97         float x = event.getX();
     98         float y = event.getY();
     99         if (x> mWidth-2*mHeight) {
    100             resetToOriginal();
    101         }
    102         return true;
    103     }
    104 
    105     public void resetToOriginal(){
    106         System.arraycopy(mOrigHSVO, 0, mHSVO, 0, mOrigHSVO.length);
    107         updatePaint();
    108         notifyColorListeners(mHSVO);
    109         invalidate();
    110     }
    111 
    112     @Override
    113     protected void onSizeChanged(int w, int h, int oldw, int oldh) {
    114         mWidth = w;
    115         mHeight = h;
    116         updatePaint();
    117     }
    118 
    119     private void updatePaint() {
    120         int color = Color.HSVToColor((int) (mHSVO[3] * 255), mHSVO);
    121         mBarPaint1.setColor(color);
    122         int origColor = Color.HSVToColor((int) (mOrigHSVO[3] * 255), mOrigHSVO);
    123         mOrigBarPaint1.setColor(origColor);
    124         mOrigRegion = new Path();
    125         mOrigRegion.moveTo(mWidth, 0);
    126         mOrigRegion.lineTo(mWidth, mHeight);
    127         mOrigRegion.lineTo(mWidth - mHeight * 2, mHeight);
    128         mOrigRegion.lineTo(mWidth - mHeight, 0);
    129 
    130         mRegion = new Path();
    131         mRegion.moveTo(0, 0);
    132         mRegion.lineTo(mWidth - mHeight, 0);
    133         mRegion.lineTo(mWidth - mHeight * 2, mHeight);
    134         mRegion.lineTo(0, mHeight);
    135 
    136     }
    137 
    138     @Override
    139     protected void onDraw(Canvas canvas) {
    140         super.onDraw(canvas);
    141         canvas.drawColor(mBgcolor);
    142         canvas.drawRect(mBorder, 0, mWidth, mHeight, mCheckPaint);
    143         canvas.drawPath(mRegion, mBarPaint1);
    144         canvas.drawPath(mOrigRegion, mOrigBarPaint1);
    145     }
    146 
    147     public void setOrigColor(float[] hsv) {
    148         System.arraycopy(hsv, 0, mOrigHSVO, 0, mOrigHSVO.length);
    149         int color2 = Color.HSVToColor((int) (mOrigHSVO[3] * 255), mOrigHSVO);
    150         mOrigBarPaint1.setColor(color2);
    151         updatePaint();
    152     }
    153 
    154     @Override
    155     public void setColor(float[] hsv) {
    156         System.arraycopy(hsv, 0, mHSVO, 0, mHSVO.length);
    157         updatePaint();
    158         invalidate();
    159     }
    160 
    161     ArrayList<ColorListener> mColorListeners = new ArrayList<ColorListener>();
    162 
    163     public void notifyColorListeners(float[] hsvo) {
    164         for (ColorListener l : mColorListeners) {
    165             l.setColor(hsvo);
    166         }
    167     }
    168 
    169     public void addColorListener(ColorListener l) {
    170         mColorListeners.add(l);
    171     }
    172 
    173     public void removeColorListener(ColorListener l) {
    174         mColorListeners.remove(l);
    175     }
    176 }
    177 
    178