1 /* 2 * Copyright (C) 2017 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.settingslib.graph; 18 19 import android.animation.ArgbEvaluator; 20 import android.annotation.Nullable; 21 import android.content.Context; 22 import android.content.res.Resources; 23 import android.content.res.TypedArray; 24 import android.graphics.Canvas; 25 import android.graphics.Color; 26 import android.graphics.ColorFilter; 27 import android.graphics.Paint; 28 import android.graphics.Path; 29 import android.graphics.RectF; 30 import android.graphics.Typeface; 31 import android.graphics.drawable.Drawable; 32 import android.util.TypedValue; 33 34 import com.android.settingslib.R; 35 import com.android.settingslib.Utils; 36 37 public class BatteryMeterDrawableBase extends Drawable { 38 39 private static final float ASPECT_RATIO = 9.5f / 14.5f; 40 public static final String TAG = BatteryMeterDrawableBase.class.getSimpleName(); 41 42 protected final Context mContext; 43 protected final Paint mFramePaint; 44 protected final Paint mBatteryPaint; 45 protected final Paint mWarningTextPaint; 46 protected final Paint mTextPaint; 47 protected final Paint mBoltPaint; 48 protected final Paint mPlusPaint; 49 50 private int mLevel = -1; 51 private boolean mCharging; 52 private boolean mPowerSaveEnabled; 53 private boolean mShowPercent; 54 55 private static final boolean SINGLE_DIGIT_PERCENT = false; 56 57 private static final int FULL = 96; 58 59 private static final float BOLT_LEVEL_THRESHOLD = 0.3f; // opaque bolt below this fraction 60 61 private final int[] mColors; 62 private final int mIntrinsicWidth; 63 private final int mIntrinsicHeight; 64 65 private float mButtonHeightFraction; 66 private float mSubpixelSmoothingLeft; 67 private float mSubpixelSmoothingRight; 68 private float mTextHeight, mWarningTextHeight; 69 private int mIconTint = Color.WHITE; 70 private float mOldDarkIntensity = -1f; 71 72 private int mHeight; 73 private int mWidth; 74 private String mWarningString; 75 private final int mCriticalLevel; 76 private int mChargeColor; 77 private final float[] mBoltPoints; 78 private final Path mBoltPath = new Path(); 79 private final float[] mPlusPoints; 80 private final Path mPlusPath = new Path(); 81 82 private final RectF mFrame = new RectF(); 83 private final RectF mButtonFrame = new RectF(); 84 private final RectF mBoltFrame = new RectF(); 85 private final RectF mPlusFrame = new RectF(); 86 87 private final Path mShapePath = new Path(); 88 private final Path mClipPath = new Path(); 89 private final Path mTextPath = new Path(); 90 91 public BatteryMeterDrawableBase(Context context, int frameColor) { 92 mContext = context; 93 final Resources res = context.getResources(); 94 TypedArray levels = res.obtainTypedArray(R.array.batterymeter_color_levels); 95 TypedArray colors = res.obtainTypedArray(R.array.batterymeter_color_values); 96 97 final int N = levels.length(); 98 mColors = new int[2 * N]; 99 for (int i=0; i < N; i++) { 100 mColors[2 * i] = levels.getInt(i, 0); 101 if (colors.getType(i) == TypedValue.TYPE_ATTRIBUTE) { 102 mColors[2 * i + 1] = Utils.getColorAttr(context, colors.getThemeAttributeId(i, 0)); 103 } else { 104 mColors[2 * i + 1] = colors.getColor(i, 0); 105 } 106 } 107 levels.recycle(); 108 colors.recycle(); 109 110 mWarningString = context.getString(R.string.battery_meter_very_low_overlay_symbol); 111 mCriticalLevel = mContext.getResources().getInteger( 112 com.android.internal.R.integer.config_criticalBatteryWarningLevel); 113 mButtonHeightFraction = context.getResources().getFraction( 114 R.fraction.battery_button_height_fraction, 1, 1); 115 mSubpixelSmoothingLeft = context.getResources().getFraction( 116 R.fraction.battery_subpixel_smoothing_left, 1, 1); 117 mSubpixelSmoothingRight = context.getResources().getFraction( 118 R.fraction.battery_subpixel_smoothing_right, 1, 1); 119 120 mFramePaint = new Paint(Paint.ANTI_ALIAS_FLAG); 121 mFramePaint.setColor(frameColor); 122 mFramePaint.setDither(true); 123 mFramePaint.setStrokeWidth(0); 124 mFramePaint.setStyle(Paint.Style.FILL_AND_STROKE); 125 126 mBatteryPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 127 mBatteryPaint.setDither(true); 128 mBatteryPaint.setStrokeWidth(0); 129 mBatteryPaint.setStyle(Paint.Style.FILL_AND_STROKE); 130 131 mTextPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 132 Typeface font = Typeface.create("sans-serif-condensed", Typeface.BOLD); 133 mTextPaint.setTypeface(font); 134 mTextPaint.setTextAlign(Paint.Align.CENTER); 135 136 mWarningTextPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 137 font = Typeface.create("sans-serif", Typeface.BOLD); 138 mWarningTextPaint.setTypeface(font); 139 mWarningTextPaint.setTextAlign(Paint.Align.CENTER); 140 if (mColors.length > 1) { 141 mWarningTextPaint.setColor(mColors[1]); 142 } 143 144 mChargeColor = Utils.getDefaultColor(mContext, R.color.meter_consumed_color); 145 146 mBoltPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 147 mBoltPaint.setColor(Utils.getDefaultColor(mContext, R.color.batterymeter_bolt_color)); 148 mBoltPoints = loadPoints(res, R.array.batterymeter_bolt_points); 149 150 mPlusPaint = new Paint(mBoltPaint); 151 mPlusPoints = loadPoints(res, R.array.batterymeter_plus_points); 152 153 mIntrinsicWidth = context.getResources().getDimensionPixelSize(R.dimen.battery_width); 154 mIntrinsicHeight = context.getResources().getDimensionPixelSize(R.dimen.battery_height); 155 } 156 157 @Override 158 public int getIntrinsicHeight() { 159 return mIntrinsicHeight; 160 } 161 162 @Override 163 public int getIntrinsicWidth() { 164 return mIntrinsicWidth; 165 } 166 167 public void setShowPercent(boolean show) { 168 mShowPercent = show; 169 postInvalidate(); 170 } 171 172 public void setCharging(boolean val) { 173 mCharging = val; 174 postInvalidate(); 175 } 176 177 public boolean getCharging() { 178 return mCharging; 179 } 180 181 public void setBatteryLevel(int val) { 182 mLevel = val; 183 postInvalidate(); 184 } 185 186 public int getBatteryLevel() { 187 return mLevel; 188 } 189 190 public void setPowerSave(boolean val) { 191 mPowerSaveEnabled = val; 192 postInvalidate(); 193 } 194 195 // an approximation of View.postInvalidate() 196 protected void postInvalidate() { 197 unscheduleSelf(this::invalidateSelf); 198 scheduleSelf(this::invalidateSelf, 0); 199 } 200 201 private static float[] loadPoints(Resources res, int pointArrayRes) { 202 final int[] pts = res.getIntArray(pointArrayRes); 203 int maxX = 0, maxY = 0; 204 for (int i = 0; i < pts.length; i += 2) { 205 maxX = Math.max(maxX, pts[i]); 206 maxY = Math.max(maxY, pts[i + 1]); 207 } 208 final float[] ptsF = new float[pts.length]; 209 for (int i = 0; i < pts.length; i += 2) { 210 ptsF[i] = (float) pts[i] / maxX; 211 ptsF[i + 1] = (float) pts[i + 1] / maxY; 212 } 213 return ptsF; 214 } 215 216 @Override 217 public void setBounds(int left, int top, int right, int bottom) { 218 super.setBounds(left, top, right, bottom); 219 mHeight = bottom - top; 220 mWidth = right - left; 221 mWarningTextPaint.setTextSize(mHeight * 0.75f); 222 mWarningTextHeight = -mWarningTextPaint.getFontMetrics().ascent; 223 } 224 225 private int getColorForLevel(int percent) { 226 // If we are in power save mode, always use the normal color. 227 if (mPowerSaveEnabled) { 228 return mIconTint; 229 } 230 int thresh, color = 0; 231 for (int i = 0; i < mColors.length; i += 2) { 232 thresh = mColors[i]; 233 color = mColors[i + 1]; 234 if (percent <= thresh) { 235 236 // Respect tinting for "normal" level 237 if (i == mColors.length - 2) { 238 return mIconTint; 239 } else { 240 return color; 241 } 242 } 243 } 244 return color; 245 } 246 247 public void setColors(int fillColor, int backgroundColor) { 248 mIconTint = fillColor; 249 mFramePaint.setColor(backgroundColor); 250 mBoltPaint.setColor(fillColor); 251 mChargeColor = fillColor; 252 invalidateSelf(); 253 } 254 255 @Override 256 public void draw(Canvas c) { 257 final int level = mLevel; 258 259 if (level == -1) return; 260 261 float drawFrac = (float) level / 100f; 262 final int height = mHeight; 263 final int width = (int) (ASPECT_RATIO * mHeight); 264 int px = (mWidth - width) / 2; 265 266 final int buttonHeight = (int) (height * mButtonHeightFraction); 267 268 mFrame.set(0, 0, width, height); 269 mFrame.offset(px, 0); 270 271 // button-frame: area above the battery body 272 mButtonFrame.set( 273 mFrame.left + Math.round(width * 0.25f), 274 mFrame.top, 275 mFrame.right - Math.round(width * 0.25f), 276 mFrame.top + buttonHeight); 277 278 mButtonFrame.top += mSubpixelSmoothingLeft; 279 mButtonFrame.left += mSubpixelSmoothingLeft; 280 mButtonFrame.right -= mSubpixelSmoothingRight; 281 282 // frame: battery body area 283 mFrame.top += buttonHeight; 284 mFrame.left += mSubpixelSmoothingLeft; 285 mFrame.top += mSubpixelSmoothingLeft; 286 mFrame.right -= mSubpixelSmoothingRight; 287 mFrame.bottom -= mSubpixelSmoothingRight; 288 289 // set the battery charging color 290 mBatteryPaint.setColor(mCharging ? mChargeColor : getColorForLevel(level)); 291 292 if (level >= FULL) { 293 drawFrac = 1f; 294 } else if (level <= mCriticalLevel) { 295 drawFrac = 0f; 296 } 297 298 final float levelTop = drawFrac == 1f ? mButtonFrame.top 299 : (mFrame.top + (mFrame.height() * (1f - drawFrac))); 300 301 // define the battery shape 302 mShapePath.reset(); 303 mShapePath.moveTo(mButtonFrame.left, mButtonFrame.top); 304 mShapePath.lineTo(mButtonFrame.right, mButtonFrame.top); 305 mShapePath.lineTo(mButtonFrame.right, mFrame.top); 306 mShapePath.lineTo(mFrame.right, mFrame.top); 307 mShapePath.lineTo(mFrame.right, mFrame.bottom); 308 mShapePath.lineTo(mFrame.left, mFrame.bottom); 309 mShapePath.lineTo(mFrame.left, mFrame.top); 310 mShapePath.lineTo(mButtonFrame.left, mFrame.top); 311 mShapePath.lineTo(mButtonFrame.left, mButtonFrame.top); 312 313 if (mCharging) { 314 // define the bolt shape 315 final float bl = mFrame.left + mFrame.width() / 4f; 316 final float bt = mFrame.top + mFrame.height() / 6f; 317 final float br = mFrame.right - mFrame.width() / 4f; 318 final float bb = mFrame.bottom - mFrame.height() / 10f; 319 if (mBoltFrame.left != bl || mBoltFrame.top != bt 320 || mBoltFrame.right != br || mBoltFrame.bottom != bb) { 321 mBoltFrame.set(bl, bt, br, bb); 322 mBoltPath.reset(); 323 mBoltPath.moveTo( 324 mBoltFrame.left + mBoltPoints[0] * mBoltFrame.width(), 325 mBoltFrame.top + mBoltPoints[1] * mBoltFrame.height()); 326 for (int i = 2; i < mBoltPoints.length; i += 2) { 327 mBoltPath.lineTo( 328 mBoltFrame.left + mBoltPoints[i] * mBoltFrame.width(), 329 mBoltFrame.top + mBoltPoints[i + 1] * mBoltFrame.height()); 330 } 331 mBoltPath.lineTo( 332 mBoltFrame.left + mBoltPoints[0] * mBoltFrame.width(), 333 mBoltFrame.top + mBoltPoints[1] * mBoltFrame.height()); 334 } 335 336 float boltPct = (mBoltFrame.bottom - levelTop) / (mBoltFrame.bottom - mBoltFrame.top); 337 boltPct = Math.min(Math.max(boltPct, 0), 1); 338 if (boltPct <= BOLT_LEVEL_THRESHOLD) { 339 // draw the bolt if opaque 340 c.drawPath(mBoltPath, mBoltPaint); 341 } else { 342 // otherwise cut the bolt out of the overall shape 343 mShapePath.op(mBoltPath, Path.Op.DIFFERENCE); 344 } 345 } else if (mPowerSaveEnabled) { 346 // define the plus shape 347 final float pw = mFrame.width() * 2 / 3; 348 final float pl = mFrame.left + (mFrame.width() - pw) / 2; 349 final float pt = mFrame.top + (mFrame.height() - pw) / 2; 350 final float pr = mFrame.right - (mFrame.width() - pw) / 2; 351 final float pb = mFrame.bottom - (mFrame.height() - pw) / 2; 352 if (mPlusFrame.left != pl || mPlusFrame.top != pt 353 || mPlusFrame.right != pr || mPlusFrame.bottom != pb) { 354 mPlusFrame.set(pl, pt, pr, pb); 355 mPlusPath.reset(); 356 mPlusPath.moveTo( 357 mPlusFrame.left + mPlusPoints[0] * mPlusFrame.width(), 358 mPlusFrame.top + mPlusPoints[1] * mPlusFrame.height()); 359 for (int i = 2; i < mPlusPoints.length; i += 2) { 360 mPlusPath.lineTo( 361 mPlusFrame.left + mPlusPoints[i] * mPlusFrame.width(), 362 mPlusFrame.top + mPlusPoints[i + 1] * mPlusFrame.height()); 363 } 364 mPlusPath.lineTo( 365 mPlusFrame.left + mPlusPoints[0] * mPlusFrame.width(), 366 mPlusFrame.top + mPlusPoints[1] * mPlusFrame.height()); 367 } 368 369 float boltPct = (mPlusFrame.bottom - levelTop) / (mPlusFrame.bottom - mPlusFrame.top); 370 boltPct = Math.min(Math.max(boltPct, 0), 1); 371 if (boltPct <= BOLT_LEVEL_THRESHOLD) { 372 // draw the bolt if opaque 373 c.drawPath(mPlusPath, mPlusPaint); 374 } else { 375 // otherwise cut the bolt out of the overall shape 376 mShapePath.op(mPlusPath, Path.Op.DIFFERENCE); 377 } 378 } 379 380 // compute percentage text 381 boolean pctOpaque = false; 382 float pctX = 0, pctY = 0; 383 String pctText = null; 384 if (!mCharging && !mPowerSaveEnabled && level > mCriticalLevel && mShowPercent) { 385 mTextPaint.setColor(getColorForLevel(level)); 386 mTextPaint.setTextSize(height * 387 (SINGLE_DIGIT_PERCENT ? 0.75f 388 : (mLevel == 100 ? 0.38f : 0.5f))); 389 mTextHeight = -mTextPaint.getFontMetrics().ascent; 390 pctText = String.valueOf(SINGLE_DIGIT_PERCENT ? (level / 10) : level); 391 pctX = mWidth * 0.5f; 392 pctY = (mHeight + mTextHeight) * 0.47f; 393 pctOpaque = levelTop > pctY; 394 if (!pctOpaque) { 395 mTextPath.reset(); 396 mTextPaint.getTextPath(pctText, 0, pctText.length(), pctX, pctY, mTextPath); 397 // cut the percentage text out of the overall shape 398 mShapePath.op(mTextPath, Path.Op.DIFFERENCE); 399 } 400 } 401 402 // draw the battery shape background 403 c.drawPath(mShapePath, mFramePaint); 404 405 // draw the battery shape, clipped to charging level 406 mFrame.top = levelTop; 407 mClipPath.reset(); 408 mClipPath.addRect(mFrame, Path.Direction.CCW); 409 mShapePath.op(mClipPath, Path.Op.INTERSECT); 410 c.drawPath(mShapePath, mBatteryPaint); 411 412 if (!mCharging && !mPowerSaveEnabled) { 413 if (level <= mCriticalLevel) { 414 // draw the warning text 415 final float x = mWidth * 0.5f; 416 final float y = (mHeight + mWarningTextHeight) * 0.48f; 417 c.drawText(mWarningString, x, y, mWarningTextPaint); 418 } else if (pctOpaque) { 419 // draw the percentage text 420 c.drawText(pctText, pctX, pctY, mTextPaint); 421 } 422 } 423 } 424 425 // Some stuff required by Drawable. 426 @Override 427 public void setAlpha(int alpha) { 428 } 429 430 @Override 431 public void setColorFilter(@Nullable ColorFilter colorFilter) { 432 mFramePaint.setColorFilter(colorFilter); 433 mBatteryPaint.setColorFilter(colorFilter); 434 mWarningTextPaint.setColorFilter(colorFilter); 435 mBoltPaint.setColorFilter(colorFilter); 436 mPlusPaint.setColorFilter(colorFilter); 437 } 438 439 @Override 440 public int getOpacity() { 441 return 0; 442 } 443 444 public int getCriticalLevel() { 445 return mCriticalLevel; 446 } 447 } 448
