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.graphics.Bitmap; 21 import android.graphics.BitmapShader; 22 import android.graphics.Canvas; 23 import android.graphics.Color; 24 import android.graphics.LinearGradient; 25 import android.graphics.Paint; 26 import android.graphics.RadialGradient; 27 import android.graphics.RectF; 28 import android.graphics.Shader; 29 import android.util.AttributeSet; 30 import android.util.DisplayMetrics; 31 import android.view.MotionEvent; 32 import android.view.View; 33 34 import com.android.gallery3d.R; 35 36 import java.util.ArrayList; 37 38 public class ColorHueView extends View implements ColorListener { 39 40 private float mWidth; 41 42 private Paint mLinePaint1; 43 private Paint mLinePaint2; 44 private Paint mPaint = new Paint(); 45 private float mHeight; 46 private Paint mDotPaint; 47 private int mBgcolor = 0; 48 Bitmap mBitmap; 49 private float mDotRadius; 50 private float mBorder; 51 52 private float[] mHSVO = {0.f,0.f,0.f,0.f}; 53 private int mSliderColor; 54 private float mDotX = mBorder; 55 private float mDotY = mBorder; 56 57 public final static float DOT_SIZE = 20; 58 public final static float BORDER_SIZE = 20; 59 RectF mRect = new RectF(); 60 int[] mTmpBuff; 61 float[] mTmpHSV = new float[3]; 62 private Paint mCheckPaint; 63 64 public ColorHueView(Context ctx, AttributeSet attrs) { 65 super(ctx, attrs); 66 DisplayMetrics metrics = ctx.getResources().getDisplayMetrics(); 67 float mDpToPix = metrics.density; 68 mDotRadius = DOT_SIZE * mDpToPix; 69 mBorder = BORDER_SIZE * mDpToPix; 70 71 mDotPaint = new Paint(); 72 73 mDotPaint.setStyle(Paint.Style.FILL); 74 mDotPaint.setColor(ctx.getResources().getColor(R.color.slider_dot_color)); 75 mSliderColor = ctx.getResources().getColor(R.color.slider_line_color); 76 77 78 mLinePaint1 = new Paint(); 79 mLinePaint1.setColor(Color.GRAY); 80 mLinePaint2 = new Paint(); 81 mLinePaint2.setColor(mSliderColor); 82 mLinePaint2.setStrokeWidth(4); 83 84 mBitmap = Bitmap.createBitmap(256, 2, Bitmap.Config.ARGB_8888); 85 mTmpBuff = new int[mBitmap.getWidth() * mBitmap.getHeight()]; 86 mPaint.setAntiAlias(true); 87 mPaint.setFilterBitmap(true); 88 fillBitmap(); 89 makeCheckPaint(); 90 } 91 92 void fillBitmap() { 93 int w = mBitmap.getWidth(); 94 int h = mBitmap.getHeight(); 95 96 for (int x = 0; x < w; x++) { 97 float hue = 360 * (x) / (float) w; 98 99 mTmpHSV[0] = hue; 100 mTmpHSV[1] = 1; 101 mTmpHSV[2] = 1; 102 int color = Color.HSVToColor(mTmpHSV); 103 mTmpBuff[x] = color; 104 mTmpBuff[x + w] = color; 105 106 } 107 108 mBitmap.setPixels(mTmpBuff, 0, w, 0, 0, w, h); 109 } 110 111 112 public boolean onDown(MotionEvent e) { 113 return true; 114 } 115 116 @Override 117 public boolean onTouchEvent(MotionEvent event) { 118 float ox = mDotX; 119 float oy = mDotY; 120 121 float x = event.getX(); 122 float y = event.getY(); 123 124 mDotX = x; 125 126 if (mDotX < mBorder) { 127 mDotX = mBorder; 128 } 129 130 if (mDotX > mWidth - mBorder) { 131 mDotX = mWidth - mBorder; 132 } 133 mHSVO[0] = 360 * (mDotX - mBorder) / (mWidth - mBorder * 2); 134 notifyColorListeners(mHSVO); 135 setupButton(); 136 fillBitmap(); 137 // invalidate((int) (ox - mDotRadius), (int) (oy - mDotRadius), (int) (ox + mDotRadius), 138 // (int) (oy + mDotRadius)); 139 // invalidate( 140 // (int) (mDotX - mDotRadius), (int) (mDotY - mDotRadius), (int) (mDotX + mDotRadius), 141 // (int) (mDotY + mDotRadius)); 142 invalidate(); 143 144 return true; 145 } 146 147 private void setupButton() { 148 float pos = mHSVO[0] / 360 * (mWidth - mBorder * 2); 149 mDotX = pos + mBorder; 150 151 int[] colors3 = new int[]{ 152 mSliderColor, mSliderColor, 0x66000000, 0}; 153 RadialGradient g = new RadialGradient(mDotX, mDotY, mDotRadius, colors3, new float[]{ 154 0, .3f, .31f, 1}, Shader.TileMode.CLAMP); 155 mDotPaint.setShader(g); 156 } 157 158 @Override 159 protected void onSizeChanged(int w, int h, int oldw, int oldh) { 160 mWidth = w; 161 mHeight = h; 162 mDotY = mHeight / 2; 163 setupButton(); 164 } 165 166 167 @Override 168 protected void onDraw(Canvas canvas) { 169 super.onDraw(canvas); 170 canvas.drawColor(mBgcolor); 171 172 mRect.left = mBorder; 173 mRect.right = mWidth - mBorder; 174 mRect.top = 0; 175 mRect.bottom = mHeight; 176 canvas.drawRect(mRect,mCheckPaint); 177 canvas.drawBitmap(mBitmap, null, mRect, mPaint); 178 179 180 canvas.drawLine(mDotX, mDotY, mWidth - mBorder, mDotY, mLinePaint1); 181 canvas.drawLine(mBorder, mDotY, mDotX, mDotY, mLinePaint2); 182 if (!Float.isNaN(mDotX)) { 183 canvas.drawCircle(mDotX, mDotY, mDotRadius, mDotPaint); 184 } 185 } 186 187 private void makeCheckPaint(){ 188 int block = 16; 189 int checkdim = block*2; 190 int[] colors = new int[checkdim * checkdim]; 191 for (int i = 0; i < colors.length; i++) { 192 int y = i / (checkdim * block); 193 int x = (i / block) % 2; 194 colors[i] = (x == y) ? 0xFFAAAAAA : 0xFF444444; 195 } 196 Bitmap bitmap = Bitmap.createBitmap(colors, 16, 16, Bitmap.Config.ARGB_8888); 197 BitmapShader bs = new BitmapShader(bitmap, Shader.TileMode.REPEAT, Shader.TileMode.REPEAT); 198 mCheckPaint = new Paint(); 199 mCheckPaint.setShader(bs); 200 } 201 202 @Override 203 public void setColor(float[] hsv) { 204 System.arraycopy(hsv, 0, mHSVO, 0, mHSVO.length); 205 fillBitmap(); 206 setupButton(); 207 invalidate(); 208 } 209 210 ArrayList<ColorListener> mColorListeners = new ArrayList<ColorListener>(); 211 212 public void notifyColorListeners(float[] hsvo) { 213 for (ColorListener l : mColorListeners) { 214 l.setColor(hsvo); 215 } 216 } 217 218 public void addColorListener(ColorListener l) { 219 mColorListeners.add(l); 220 } 221 222 public void removeColorListener(ColorListener l) { 223 mColorListeners.remove(l); 224 } 225 } 226