Marco Nelissen | f568b60 | 2011-06-28 08:52:55 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2007 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.musicfx.seekbar; |
| 18 | |
| 19 | import android.content.Context; |
| 20 | import android.content.res.TypedArray; |
| 21 | import android.graphics.Canvas; |
| 22 | import android.graphics.Rect; |
| 23 | import android.graphics.drawable.Drawable; |
| 24 | import android.util.AttributeSet; |
| 25 | import android.view.KeyEvent; |
| 26 | import android.view.MotionEvent; |
Marco Nelissen | 0962a4b | 2011-12-08 14:53:23 -0800 | [diff] [blame] | 27 | import android.view.ViewConfiguration; |
Marco Nelissen | f568b60 | 2011-06-28 08:52:55 -0700 | [diff] [blame] | 28 | |
| 29 | public abstract class AbsSeekBar extends ProgressBar { |
| 30 | private Drawable mThumb; |
| 31 | private int mThumbOffset; |
| 32 | |
| 33 | /** |
| 34 | * On touch, this offset plus the scaled value from the position of the |
| 35 | * touch will form the progress value. Usually 0. |
| 36 | */ |
| 37 | float mTouchProgressOffset; |
| 38 | |
| 39 | /** |
| 40 | * Whether this is user seekable. |
| 41 | */ |
| 42 | boolean mIsUserSeekable = true; |
| 43 | |
Marco Nelissen | 2deae77 | 2011-06-28 09:04:34 -0700 | [diff] [blame] | 44 | boolean mIsVertical = false; |
Marco Nelissen | f568b60 | 2011-06-28 08:52:55 -0700 | [diff] [blame] | 45 | /** |
| 46 | * On key presses (right or left), the amount to increment/decrement the |
| 47 | * progress. |
| 48 | */ |
| 49 | private int mKeyProgressIncrement = 1; |
| 50 | |
| 51 | private static final int NO_ALPHA = 0xFF; |
| 52 | private float mDisabledAlpha; |
| 53 | |
Marco Nelissen | 0962a4b | 2011-12-08 14:53:23 -0800 | [diff] [blame] | 54 | private int mScaledTouchSlop; |
| 55 | private float mTouchDownX; |
Marco Nelissen | d9fc040 | 2012-04-05 09:57:03 -0700 | [diff] [blame] | 56 | private float mTouchDownY; |
Marco Nelissen | 0962a4b | 2011-12-08 14:53:23 -0800 | [diff] [blame] | 57 | private boolean mIsDragging; |
| 58 | |
Marco Nelissen | f568b60 | 2011-06-28 08:52:55 -0700 | [diff] [blame] | 59 | public AbsSeekBar(Context context) { |
| 60 | super(context); |
| 61 | } |
| 62 | |
| 63 | public AbsSeekBar(Context context, AttributeSet attrs) { |
| 64 | super(context, attrs); |
| 65 | } |
| 66 | |
| 67 | public AbsSeekBar(Context context, AttributeSet attrs, int defStyle) { |
| 68 | super(context, attrs, defStyle); |
| 69 | |
| 70 | TypedArray a = context.obtainStyledAttributes(attrs, |
| 71 | com.android.internal.R.styleable.SeekBar, defStyle, 0); |
| 72 | Drawable thumb = a.getDrawable(com.android.internal.R.styleable.SeekBar_thumb); |
| 73 | setThumb(thumb); // will guess mThumbOffset if thumb != null... |
| 74 | // ...but allow layout to override this |
| 75 | int thumbOffset = a.getDimensionPixelOffset( |
| 76 | com.android.internal.R.styleable.SeekBar_thumbOffset, getThumbOffset()); |
| 77 | setThumbOffset(thumbOffset); |
| 78 | a.recycle(); |
| 79 | |
| 80 | a = context.obtainStyledAttributes(attrs, |
| 81 | com.android.internal.R.styleable.Theme, 0, 0); |
| 82 | mDisabledAlpha = a.getFloat(com.android.internal.R.styleable.Theme_disabledAlpha, 0.5f); |
| 83 | a.recycle(); |
Marco Nelissen | 0962a4b | 2011-12-08 14:53:23 -0800 | [diff] [blame] | 84 | |
| 85 | mScaledTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop(); |
Marco Nelissen | f568b60 | 2011-06-28 08:52:55 -0700 | [diff] [blame] | 86 | } |
| 87 | |
| 88 | /** |
| 89 | * Sets the thumb that will be drawn at the end of the progress meter within the SeekBar. |
| 90 | * <p> |
| 91 | * If the thumb is a valid drawable (i.e. not null), half its width will be |
| 92 | * used as the new thumb offset (@see #setThumbOffset(int)). |
| 93 | * |
| 94 | * @param thumb Drawable representing the thumb |
| 95 | */ |
| 96 | public void setThumb(Drawable thumb) { |
| 97 | boolean needUpdate; |
| 98 | // This way, calling setThumb again with the same bitmap will result in |
| 99 | // it recalcuating mThumbOffset (if for example it the bounds of the |
| 100 | // drawable changed) |
| 101 | if (mThumb != null && thumb != mThumb) { |
| 102 | mThumb.setCallback(null); |
| 103 | needUpdate = true; |
| 104 | } else { |
| 105 | needUpdate = false; |
| 106 | } |
| 107 | if (thumb != null) { |
| 108 | thumb.setCallback(this); |
| 109 | |
| 110 | // Assuming the thumb drawable is symmetric, set the thumb offset |
| 111 | // such that the thumb will hang halfway off either edge of the |
| 112 | // progress bar. |
Marco Nelissen | 2deae77 | 2011-06-28 09:04:34 -0700 | [diff] [blame] | 113 | if (mIsVertical) { |
| 114 | mThumbOffset = thumb.getIntrinsicHeight() / 2; |
| 115 | } else { |
| 116 | mThumbOffset = thumb.getIntrinsicWidth() / 2; |
| 117 | } |
Marco Nelissen | f568b60 | 2011-06-28 08:52:55 -0700 | [diff] [blame] | 118 | |
| 119 | // If we're updating get the new states |
| 120 | if (needUpdate && |
| 121 | (thumb.getIntrinsicWidth() != mThumb.getIntrinsicWidth() |
| 122 | || thumb.getIntrinsicHeight() != mThumb.getIntrinsicHeight())) { |
| 123 | requestLayout(); |
| 124 | } |
| 125 | } |
| 126 | mThumb = thumb; |
| 127 | invalidate(); |
| 128 | if (needUpdate) { |
| 129 | updateThumbPos(getWidth(), getHeight()); |
| 130 | if (thumb.isStateful()) { |
| 131 | // Note that if the states are different this won't work. |
| 132 | // For now, let's consider that an app bug. |
| 133 | int[] state = getDrawableState(); |
| 134 | thumb.setState(state); |
| 135 | } |
| 136 | } |
| 137 | } |
| 138 | |
| 139 | /** |
| 140 | * @see #setThumbOffset(int) |
| 141 | */ |
| 142 | public int getThumbOffset() { |
| 143 | return mThumbOffset; |
| 144 | } |
| 145 | |
| 146 | /** |
| 147 | * Sets the thumb offset that allows the thumb to extend out of the range of |
| 148 | * the track. |
| 149 | * |
| 150 | * @param thumbOffset The offset amount in pixels. |
| 151 | */ |
| 152 | public void setThumbOffset(int thumbOffset) { |
| 153 | mThumbOffset = thumbOffset; |
| 154 | invalidate(); |
| 155 | } |
| 156 | |
| 157 | /** |
| 158 | * Sets the amount of progress changed via the arrow keys. |
| 159 | * |
| 160 | * @param increment The amount to increment or decrement when the user |
| 161 | * presses the arrow keys. |
| 162 | */ |
| 163 | public void setKeyProgressIncrement(int increment) { |
| 164 | mKeyProgressIncrement = increment < 0 ? -increment : increment; |
| 165 | } |
| 166 | |
| 167 | /** |
| 168 | * Returns the amount of progress changed via the arrow keys. |
| 169 | * <p> |
| 170 | * By default, this will be a value that is derived from the max progress. |
| 171 | * |
| 172 | * @return The amount to increment or decrement when the user presses the |
| 173 | * arrow keys. This will be positive. |
| 174 | */ |
| 175 | public int getKeyProgressIncrement() { |
| 176 | return mKeyProgressIncrement; |
| 177 | } |
| 178 | |
| 179 | @Override |
| 180 | public synchronized void setMax(int max) { |
| 181 | super.setMax(max); |
| 182 | |
| 183 | if ((mKeyProgressIncrement == 0) || (getMax() / mKeyProgressIncrement > 20)) { |
| 184 | // It will take the user too long to change this via keys, change it |
| 185 | // to something more reasonable |
| 186 | setKeyProgressIncrement(Math.max(1, Math.round((float) getMax() / 20))); |
| 187 | } |
| 188 | } |
| 189 | |
| 190 | @Override |
| 191 | protected boolean verifyDrawable(Drawable who) { |
| 192 | return who == mThumb || super.verifyDrawable(who); |
| 193 | } |
| 194 | |
| 195 | @Override |
| 196 | public void jumpDrawablesToCurrentState() { |
| 197 | super.jumpDrawablesToCurrentState(); |
| 198 | if (mThumb != null) mThumb.jumpToCurrentState(); |
| 199 | } |
| 200 | |
| 201 | @Override |
| 202 | protected void drawableStateChanged() { |
| 203 | super.drawableStateChanged(); |
| 204 | |
| 205 | Drawable progressDrawable = getProgressDrawable(); |
| 206 | if (progressDrawable != null) { |
| 207 | progressDrawable.setAlpha(isEnabled() ? NO_ALPHA : (int) (NO_ALPHA * mDisabledAlpha)); |
| 208 | } |
| 209 | |
| 210 | if (mThumb != null && mThumb.isStateful()) { |
| 211 | int[] state = getDrawableState(); |
| 212 | mThumb.setState(state); |
| 213 | } |
| 214 | } |
| 215 | |
| 216 | @Override |
| 217 | void onProgressRefresh(float scale, boolean fromUser) { |
| 218 | super.onProgressRefresh(scale, fromUser); |
| 219 | Drawable thumb = mThumb; |
| 220 | if (thumb != null) { |
Marco Nelissen | 2deae77 | 2011-06-28 09:04:34 -0700 | [diff] [blame] | 221 | setThumbPos(getWidth(), getHeight(), thumb, scale, Integer.MIN_VALUE); |
Marco Nelissen | f568b60 | 2011-06-28 08:52:55 -0700 | [diff] [blame] | 222 | /* |
| 223 | * Since we draw translated, the drawable's bounds that it signals |
| 224 | * for invalidation won't be the actual bounds we want invalidated, |
| 225 | * so just invalidate this whole view. |
| 226 | */ |
| 227 | invalidate(); |
| 228 | } |
| 229 | } |
| 230 | |
| 231 | |
| 232 | @Override |
| 233 | protected void onSizeChanged(int w, int h, int oldw, int oldh) { |
| 234 | updateThumbPos(w, h); |
| 235 | } |
| 236 | |
| 237 | private void updateThumbPos(int w, int h) { |
| 238 | Drawable d = getCurrentDrawable(); |
| 239 | Drawable thumb = mThumb; |
Marco Nelissen | 2deae77 | 2011-06-28 09:04:34 -0700 | [diff] [blame] | 240 | if (mIsVertical) { |
| 241 | int thumbWidth = thumb == null ? 0 : thumb.getIntrinsicWidth(); |
| 242 | // The max width does not incorporate padding, whereas the width |
| 243 | // parameter does |
| 244 | int trackWidth = Math.min(mMaxWidth, w - mPaddingLeft - mPaddingRight); |
| 245 | |
| 246 | int max = getMax(); |
| 247 | float scale = max > 0 ? (float) getProgress() / (float) max : 0; |
| 248 | |
| 249 | if (thumbWidth > trackWidth) { |
| 250 | if (thumb != null) { |
| 251 | setThumbPos(w, h, thumb, scale, 0); |
| 252 | } |
| 253 | int gapForCenteringTrack = (thumbWidth - trackWidth) / 2; |
| 254 | if (d != null) { |
| 255 | // Canvas will be translated by the padding, so 0,0 is where we start drawing |
| 256 | d.setBounds(gapForCenteringTrack, 0, |
| 257 | w - mPaddingRight - gapForCenteringTrack - mPaddingLeft, |
| 258 | h - mPaddingBottom - mPaddingTop); |
| 259 | } |
| 260 | } else { |
| 261 | if (d != null) { |
| 262 | // Canvas will be translated by the padding, so 0,0 is where we start drawing |
| 263 | d.setBounds(0, 0, w - mPaddingRight - mPaddingLeft, h - mPaddingBottom |
| 264 | - mPaddingTop); |
| 265 | } |
| 266 | int gap = (trackWidth - thumbWidth) / 2; |
| 267 | if (thumb != null) { |
| 268 | setThumbPos(w, h, thumb, scale, gap); |
| 269 | } |
Marco Nelissen | f568b60 | 2011-06-28 08:52:55 -0700 | [diff] [blame] | 270 | } |
| 271 | } else { |
Marco Nelissen | 2deae77 | 2011-06-28 09:04:34 -0700 | [diff] [blame] | 272 | int thumbHeight = thumb == null ? 0 : thumb.getIntrinsicHeight(); |
| 273 | // The max height does not incorporate padding, whereas the height |
| 274 | // parameter does |
| 275 | int trackHeight = Math.min(mMaxHeight, h - mPaddingTop - mPaddingBottom); |
| 276 | |
| 277 | int max = getMax(); |
| 278 | float scale = max > 0 ? (float) getProgress() / (float) max : 0; |
| 279 | |
| 280 | if (thumbHeight > trackHeight) { |
| 281 | if (thumb != null) { |
| 282 | setThumbPos(w, h, thumb, scale, 0); |
| 283 | } |
| 284 | int gapForCenteringTrack = (thumbHeight - trackHeight) / 2; |
| 285 | if (d != null) { |
| 286 | // Canvas will be translated by the padding, so 0,0 is where we start drawing |
| 287 | d.setBounds(0, gapForCenteringTrack, |
| 288 | w - mPaddingRight - mPaddingLeft, h - mPaddingBottom - gapForCenteringTrack |
| 289 | - mPaddingTop); |
| 290 | } |
| 291 | } else { |
| 292 | if (d != null) { |
| 293 | // Canvas will be translated by the padding, so 0,0 is where we start drawing |
| 294 | d.setBounds(0, 0, w - mPaddingRight - mPaddingLeft, h - mPaddingBottom |
| 295 | - mPaddingTop); |
| 296 | } |
| 297 | int gap = (trackHeight - thumbHeight) / 2; |
| 298 | if (thumb != null) { |
| 299 | setThumbPos(w, h, thumb, scale, gap); |
| 300 | } |
Marco Nelissen | f568b60 | 2011-06-28 08:52:55 -0700 | [diff] [blame] | 301 | } |
| 302 | } |
| 303 | } |
| 304 | |
| 305 | /** |
| 306 | * @param gap If set to {@link Integer#MIN_VALUE}, this will be ignored and |
| 307 | */ |
Marco Nelissen | 2deae77 | 2011-06-28 09:04:34 -0700 | [diff] [blame] | 308 | private void setThumbPos(int w, int h, Drawable thumb, float scale, int gap) { |
| 309 | int available; |
Marco Nelissen | f568b60 | 2011-06-28 08:52:55 -0700 | [diff] [blame] | 310 | int thumbWidth = thumb.getIntrinsicWidth(); |
| 311 | int thumbHeight = thumb.getIntrinsicHeight(); |
Marco Nelissen | 2deae77 | 2011-06-28 09:04:34 -0700 | [diff] [blame] | 312 | if (mIsVertical) { |
| 313 | available = h - mPaddingTop - mPaddingBottom - thumbHeight; |
| 314 | } else { |
| 315 | available = w - mPaddingLeft - mPaddingRight - thumbWidth; |
| 316 | } |
Marco Nelissen | f568b60 | 2011-06-28 08:52:55 -0700 | [diff] [blame] | 317 | |
| 318 | // The extra space for the thumb to move on the track |
| 319 | available += mThumbOffset * 2; |
| 320 | |
Marco Nelissen | f568b60 | 2011-06-28 08:52:55 -0700 | [diff] [blame] | 321 | |
Marco Nelissen | 2deae77 | 2011-06-28 09:04:34 -0700 | [diff] [blame] | 322 | if (mIsVertical) { |
| 323 | int thumbPos = (int) ((1.0f - scale) * available); |
| 324 | int leftBound, rightBound; |
| 325 | if (gap == Integer.MIN_VALUE) { |
| 326 | Rect oldBounds = thumb.getBounds(); |
| 327 | leftBound = oldBounds.left; |
| 328 | rightBound = oldBounds.right; |
| 329 | } else { |
| 330 | leftBound = gap; |
| 331 | rightBound = gap + thumbWidth; |
| 332 | } |
| 333 | |
| 334 | // Canvas will be translated, so 0,0 is where we start drawing |
| 335 | thumb.setBounds(leftBound, thumbPos, rightBound, thumbPos + thumbHeight); |
Marco Nelissen | f568b60 | 2011-06-28 08:52:55 -0700 | [diff] [blame] | 336 | } else { |
Marco Nelissen | 2deae77 | 2011-06-28 09:04:34 -0700 | [diff] [blame] | 337 | int thumbPos = (int) (scale * available); |
| 338 | int topBound, bottomBound; |
| 339 | if (gap == Integer.MIN_VALUE) { |
| 340 | Rect oldBounds = thumb.getBounds(); |
| 341 | topBound = oldBounds.top; |
| 342 | bottomBound = oldBounds.bottom; |
| 343 | } else { |
| 344 | topBound = gap; |
| 345 | bottomBound = gap + thumbHeight; |
| 346 | } |
| 347 | |
| 348 | // Canvas will be translated, so 0,0 is where we start drawing |
| 349 | thumb.setBounds(thumbPos, topBound, thumbPos + thumbWidth, bottomBound); |
Marco Nelissen | f568b60 | 2011-06-28 08:52:55 -0700 | [diff] [blame] | 350 | } |
Marco Nelissen | f568b60 | 2011-06-28 08:52:55 -0700 | [diff] [blame] | 351 | } |
| 352 | |
| 353 | @Override |
| 354 | protected synchronized void onDraw(Canvas canvas) { |
| 355 | super.onDraw(canvas); |
| 356 | if (mThumb != null) { |
| 357 | canvas.save(); |
Marco Nelissen | 2deae77 | 2011-06-28 09:04:34 -0700 | [diff] [blame] | 358 | // Translate the padding. For the x/y, we need to allow the thumb to |
Marco Nelissen | f568b60 | 2011-06-28 08:52:55 -0700 | [diff] [blame] | 359 | // draw in its extra space |
Marco Nelissen | 2deae77 | 2011-06-28 09:04:34 -0700 | [diff] [blame] | 360 | if (mIsVertical) { |
| 361 | canvas.translate(mPaddingLeft, mPaddingTop - mThumbOffset); |
| 362 | mThumb.draw(canvas); |
| 363 | canvas.restore(); |
| 364 | } else { |
| 365 | canvas.translate(mPaddingLeft - mThumbOffset, mPaddingTop); |
| 366 | mThumb.draw(canvas); |
| 367 | canvas.restore(); |
| 368 | } |
Marco Nelissen | f568b60 | 2011-06-28 08:52:55 -0700 | [diff] [blame] | 369 | } |
| 370 | } |
| 371 | |
| 372 | @Override |
| 373 | protected synchronized void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { |
| 374 | Drawable d = getCurrentDrawable(); |
| 375 | |
| 376 | int thumbHeight = mThumb == null ? 0 : mThumb.getIntrinsicHeight(); |
| 377 | int dw = 0; |
| 378 | int dh = 0; |
| 379 | if (d != null) { |
| 380 | dw = Math.max(mMinWidth, Math.min(mMaxWidth, d.getIntrinsicWidth())); |
| 381 | dh = Math.max(mMinHeight, Math.min(mMaxHeight, d.getIntrinsicHeight())); |
| 382 | dh = Math.max(thumbHeight, dh); |
| 383 | } |
| 384 | dw += mPaddingLeft + mPaddingRight; |
| 385 | dh += mPaddingTop + mPaddingBottom; |
| 386 | |
| 387 | setMeasuredDimension(resolveSizeAndState(dw, widthMeasureSpec, 0), |
| 388 | resolveSizeAndState(dh, heightMeasureSpec, 0)); |
Marco Nelissen | 2deae77 | 2011-06-28 09:04:34 -0700 | [diff] [blame] | 389 | |
| 390 | // TODO should probably make this an explicit attribute instead of implicitly |
| 391 | // setting it based on the size |
| 392 | if (getMeasuredHeight() > getMeasuredWidth()) { |
| 393 | mIsVertical = true; |
| 394 | } |
Marco Nelissen | f568b60 | 2011-06-28 08:52:55 -0700 | [diff] [blame] | 395 | } |
| 396 | |
| 397 | @Override |
| 398 | public boolean onTouchEvent(MotionEvent event) { |
| 399 | if (!mIsUserSeekable || !isEnabled()) { |
| 400 | return false; |
| 401 | } |
| 402 | |
| 403 | switch (event.getAction()) { |
| 404 | case MotionEvent.ACTION_DOWN: |
Marco Nelissen | 0962a4b | 2011-12-08 14:53:23 -0800 | [diff] [blame] | 405 | if (isInScrollingContainer()) { |
| 406 | mTouchDownX = event.getX(); |
Marco Nelissen | d9fc040 | 2012-04-05 09:57:03 -0700 | [diff] [blame] | 407 | mTouchDownY = event.getY(); |
Marco Nelissen | 0962a4b | 2011-12-08 14:53:23 -0800 | [diff] [blame] | 408 | } else { |
| 409 | setPressed(true); |
| 410 | if (mThumb != null) { |
| 411 | invalidate(mThumb.getBounds()); // This may be within the padding region |
| 412 | } |
| 413 | onStartTrackingTouch(); |
| 414 | trackTouchEvent(event); |
| 415 | attemptClaimDrag(); |
| 416 | } |
Marco Nelissen | f568b60 | 2011-06-28 08:52:55 -0700 | [diff] [blame] | 417 | break; |
| 418 | |
| 419 | case MotionEvent.ACTION_MOVE: |
Marco Nelissen | 0962a4b | 2011-12-08 14:53:23 -0800 | [diff] [blame] | 420 | if (mIsDragging) { |
| 421 | trackTouchEvent(event); |
| 422 | } else { |
| 423 | final float x = event.getX(); |
Marco Nelissen | d9fc040 | 2012-04-05 09:57:03 -0700 | [diff] [blame] | 424 | final float y = event.getX(); |
| 425 | if (Math.abs(mIsVertical ? |
| 426 | (y - mTouchDownY) : (x - mTouchDownX)) > mScaledTouchSlop) { |
Marco Nelissen | 0962a4b | 2011-12-08 14:53:23 -0800 | [diff] [blame] | 427 | setPressed(true); |
| 428 | if (mThumb != null) { |
| 429 | invalidate(mThumb.getBounds()); // This may be within the padding region |
| 430 | } |
| 431 | onStartTrackingTouch(); |
| 432 | trackTouchEvent(event); |
| 433 | attemptClaimDrag(); |
| 434 | } |
| 435 | } |
Marco Nelissen | f568b60 | 2011-06-28 08:52:55 -0700 | [diff] [blame] | 436 | break; |
| 437 | |
| 438 | case MotionEvent.ACTION_UP: |
Marco Nelissen | 0962a4b | 2011-12-08 14:53:23 -0800 | [diff] [blame] | 439 | if (mIsDragging) { |
| 440 | trackTouchEvent(event); |
| 441 | onStopTrackingTouch(); |
| 442 | setPressed(false); |
| 443 | } else { |
| 444 | // Touch up when we never crossed the touch slop threshold should |
| 445 | // be interpreted as a tap-seek to that location. |
| 446 | onStartTrackingTouch(); |
| 447 | trackTouchEvent(event); |
| 448 | onStopTrackingTouch(); |
| 449 | } |
Marco Nelissen | f568b60 | 2011-06-28 08:52:55 -0700 | [diff] [blame] | 450 | // ProgressBar doesn't know to repaint the thumb drawable |
| 451 | // in its inactive state when the touch stops (because the |
| 452 | // value has not apparently changed) |
| 453 | invalidate(); |
| 454 | break; |
| 455 | |
| 456 | case MotionEvent.ACTION_CANCEL: |
Marco Nelissen | 0962a4b | 2011-12-08 14:53:23 -0800 | [diff] [blame] | 457 | if (mIsDragging) { |
| 458 | onStopTrackingTouch(); |
| 459 | setPressed(false); |
| 460 | } |
Marco Nelissen | f568b60 | 2011-06-28 08:52:55 -0700 | [diff] [blame] | 461 | invalidate(); // see above explanation |
| 462 | break; |
| 463 | } |
| 464 | return true; |
| 465 | } |
| 466 | |
| 467 | private void trackTouchEvent(MotionEvent event) { |
Marco Nelissen | f568b60 | 2011-06-28 08:52:55 -0700 | [diff] [blame] | 468 | float progress = 0; |
Marco Nelissen | 2deae77 | 2011-06-28 09:04:34 -0700 | [diff] [blame] | 469 | if (mIsVertical) { |
| 470 | final int height = getHeight(); |
| 471 | final int available = height - mPaddingTop - mPaddingBottom; |
| 472 | int y = (int)event.getY(); |
| 473 | float scale; |
| 474 | if (y < mPaddingTop) { |
| 475 | scale = 1.0f; |
| 476 | } else if (y > height - mPaddingBottom) { |
| 477 | scale = 0.0f; |
| 478 | } else { |
| 479 | scale = 1.0f - (float)(y - mPaddingTop) / (float)available; |
| 480 | progress = mTouchProgressOffset; |
| 481 | } |
| 482 | |
| 483 | final int max = getMax(); |
| 484 | progress += scale * max; |
Marco Nelissen | f568b60 | 2011-06-28 08:52:55 -0700 | [diff] [blame] | 485 | } else { |
Marco Nelissen | 2deae77 | 2011-06-28 09:04:34 -0700 | [diff] [blame] | 486 | final int width = getWidth(); |
| 487 | final int available = width - mPaddingLeft - mPaddingRight; |
| 488 | int x = (int)event.getX(); |
| 489 | float scale; |
| 490 | if (x < mPaddingLeft) { |
| 491 | scale = 0.0f; |
| 492 | } else if (x > width - mPaddingRight) { |
| 493 | scale = 1.0f; |
| 494 | } else { |
| 495 | scale = (float)(x - mPaddingLeft) / (float)available; |
| 496 | progress = mTouchProgressOffset; |
| 497 | } |
| 498 | |
| 499 | final int max = getMax(); |
| 500 | progress += scale * max; |
Marco Nelissen | f568b60 | 2011-06-28 08:52:55 -0700 | [diff] [blame] | 501 | } |
| 502 | |
Marco Nelissen | f568b60 | 2011-06-28 08:52:55 -0700 | [diff] [blame] | 503 | setProgress((int) progress, true); |
| 504 | } |
| 505 | |
| 506 | /** |
| 507 | * Tries to claim the user's drag motion, and requests disallowing any |
| 508 | * ancestors from stealing events in the drag. |
| 509 | */ |
| 510 | private void attemptClaimDrag() { |
| 511 | if (mParent != null) { |
| 512 | mParent.requestDisallowInterceptTouchEvent(true); |
| 513 | } |
| 514 | } |
| 515 | |
| 516 | /** |
| 517 | * This is called when the user has started touching this widget. |
| 518 | */ |
| 519 | void onStartTrackingTouch() { |
Marco Nelissen | 0962a4b | 2011-12-08 14:53:23 -0800 | [diff] [blame] | 520 | mIsDragging = true; |
Marco Nelissen | f568b60 | 2011-06-28 08:52:55 -0700 | [diff] [blame] | 521 | } |
| 522 | |
| 523 | /** |
| 524 | * This is called when the user either releases his touch or the touch is |
| 525 | * canceled. |
| 526 | */ |
| 527 | void onStopTrackingTouch() { |
Marco Nelissen | 0962a4b | 2011-12-08 14:53:23 -0800 | [diff] [blame] | 528 | mIsDragging = false; |
Marco Nelissen | f568b60 | 2011-06-28 08:52:55 -0700 | [diff] [blame] | 529 | } |
| 530 | |
| 531 | /** |
| 532 | * Called when the user changes the seekbar's progress by using a key event. |
| 533 | */ |
| 534 | void onKeyChange() { |
| 535 | } |
| 536 | |
| 537 | @Override |
| 538 | public boolean onKeyDown(int keyCode, KeyEvent event) { |
| 539 | if (isEnabled()) { |
| 540 | int progress = getProgress(); |
Marco Nelissen | 2deae77 | 2011-06-28 09:04:34 -0700 | [diff] [blame] | 541 | if ((keyCode == KeyEvent.KEYCODE_DPAD_LEFT && !mIsVertical) |
| 542 | || (keyCode == KeyEvent.KEYCODE_DPAD_DOWN && mIsVertical)) { |
| 543 | if (progress > 0) { |
Marco Nelissen | f568b60 | 2011-06-28 08:52:55 -0700 | [diff] [blame] | 544 | setProgress(progress - mKeyProgressIncrement, true); |
| 545 | onKeyChange(); |
| 546 | return true; |
Marco Nelissen | 2deae77 | 2011-06-28 09:04:34 -0700 | [diff] [blame] | 547 | } |
| 548 | } else if ((keyCode == KeyEvent.KEYCODE_DPAD_RIGHT && !mIsVertical) |
| 549 | || (keyCode == KeyEvent.KEYCODE_DPAD_UP && mIsVertical)) { |
| 550 | if (progress < getMax()) { |
Marco Nelissen | f568b60 | 2011-06-28 08:52:55 -0700 | [diff] [blame] | 551 | setProgress(progress + mKeyProgressIncrement, true); |
| 552 | onKeyChange(); |
| 553 | return true; |
Marco Nelissen | 2deae77 | 2011-06-28 09:04:34 -0700 | [diff] [blame] | 554 | } |
Marco Nelissen | f568b60 | 2011-06-28 08:52:55 -0700 | [diff] [blame] | 555 | } |
| 556 | } |
| 557 | |
| 558 | return super.onKeyDown(keyCode, event); |
| 559 | } |
| 560 | |
| 561 | } |