| /* |
| * Copyright (C) 2007 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 android.widget; |
| |
| import android.annotation.Nullable; |
| import android.content.Context; |
| import android.content.res.ColorStateList; |
| import android.content.res.TypedArray; |
| import android.graphics.Canvas; |
| import android.graphics.Insets; |
| import android.graphics.PorterDuff; |
| import android.graphics.Rect; |
| import android.graphics.Region.Op; |
| import android.graphics.drawable.Drawable; |
| import android.os.Bundle; |
| import android.util.AttributeSet; |
| import android.view.KeyEvent; |
| import android.view.MotionEvent; |
| import android.view.ViewConfiguration; |
| import android.view.accessibility.AccessibilityNodeInfo; |
| |
| import com.android.internal.R; |
| |
| public abstract class AbsSeekBar extends ProgressBar { |
| private final Rect mTempRect = new Rect(); |
| |
| private Drawable mThumb; |
| private ColorStateList mThumbTintList = null; |
| private PorterDuff.Mode mThumbTintMode = null; |
| private boolean mHasThumbTint = false; |
| private boolean mHasThumbTintMode = false; |
| |
| private int mThumbOffset; |
| private boolean mSplitTrack; |
| |
| /** |
| * On touch, this offset plus the scaled value from the position of the |
| * touch will form the progress value. Usually 0. |
| */ |
| float mTouchProgressOffset; |
| |
| /** |
| * Whether this is user seekable. |
| */ |
| boolean mIsUserSeekable = true; |
| |
| /** |
| * On key presses (right or left), the amount to increment/decrement the |
| * progress. |
| */ |
| private int mKeyProgressIncrement = 1; |
| |
| private static final int NO_ALPHA = 0xFF; |
| private float mDisabledAlpha; |
| |
| private int mScaledTouchSlop; |
| private float mTouchDownX; |
| private boolean mIsDragging; |
| |
| public AbsSeekBar(Context context) { |
| super(context); |
| } |
| |
| public AbsSeekBar(Context context, AttributeSet attrs) { |
| super(context, attrs); |
| } |
| |
| public AbsSeekBar(Context context, AttributeSet attrs, int defStyleAttr) { |
| this(context, attrs, defStyleAttr, 0); |
| } |
| |
| public AbsSeekBar(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) { |
| super(context, attrs, defStyleAttr, defStyleRes); |
| |
| final TypedArray a = context.obtainStyledAttributes( |
| attrs, R.styleable.SeekBar, defStyleAttr, defStyleRes); |
| |
| final Drawable thumb = a.getDrawable(R.styleable.SeekBar_thumb); |
| setThumb(thumb); |
| |
| if (a.hasValue(R.styleable.SeekBar_thumbTintMode)) { |
| mThumbTintMode = Drawable.parseTintMode(a.getInt( |
| R.styleable.SeekBar_thumbTintMode, -1), mThumbTintMode); |
| mHasThumbTintMode = true; |
| } |
| |
| if (a.hasValue(R.styleable.SeekBar_thumbTint)) { |
| mThumbTintList = a.getColorStateList(R.styleable.SeekBar_thumbTint); |
| mHasThumbTint = true; |
| } |
| |
| mSplitTrack = a.getBoolean(R.styleable.SeekBar_splitTrack, false); |
| |
| // Guess thumb offset if thumb != null, but allow layout to override. |
| final int thumbOffset = a.getDimensionPixelOffset(R.styleable.SeekBar_thumbOffset, getThumbOffset()); |
| setThumbOffset(thumbOffset); |
| |
| final boolean useDisabledAlpha = a.getBoolean(R.styleable.SeekBar_useDisabledAlpha, true); |
| a.recycle(); |
| |
| if (useDisabledAlpha) { |
| final TypedArray ta = context.obtainStyledAttributes(attrs, R.styleable.Theme, 0, 0); |
| mDisabledAlpha = ta.getFloat(R.styleable.Theme_disabledAlpha, 0.5f); |
| ta.recycle(); |
| } else { |
| mDisabledAlpha = 1.0f; |
| } |
| |
| applyThumbTint(); |
| |
| mScaledTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop(); |
| } |
| |
| /** |
| * Sets the thumb that will be drawn at the end of the progress meter within the SeekBar. |
| * <p> |
| * If the thumb is a valid drawable (i.e. not null), half its width will be |
| * used as the new thumb offset (@see #setThumbOffset(int)). |
| * |
| * @param thumb Drawable representing the thumb |
| */ |
| public void setThumb(Drawable thumb) { |
| final boolean needUpdate; |
| // This way, calling setThumb again with the same bitmap will result in |
| // it recalcuating mThumbOffset (if for example it the bounds of the |
| // drawable changed) |
| if (mThumb != null && thumb != mThumb) { |
| mThumb.setCallback(null); |
| needUpdate = true; |
| } else { |
| needUpdate = false; |
| } |
| |
| if (thumb != null) { |
| thumb.setCallback(this); |
| if (canResolveLayoutDirection()) { |
| thumb.setLayoutDirection(getLayoutDirection()); |
| } |
| |
| // Assuming the thumb drawable is symmetric, set the thumb offset |
| // such that the thumb will hang halfway off either edge of the |
| // progress bar. |
| mThumbOffset = thumb.getIntrinsicWidth() / 2; |
| |
| // If we're updating get the new states |
| if (needUpdate && |
| (thumb.getIntrinsicWidth() != mThumb.getIntrinsicWidth() |
| || thumb.getIntrinsicHeight() != mThumb.getIntrinsicHeight())) { |
| requestLayout(); |
| } |
| } |
| |
| mThumb = thumb; |
| |
| applyThumbTint(); |
| invalidate(); |
| |
| if (needUpdate) { |
| updateThumbAndTrackPos(getWidth(), getHeight()); |
| if (thumb != null && thumb.isStateful()) { |
| // Note that if the states are different this won't work. |
| // For now, let's consider that an app bug. |
| int[] state = getDrawableState(); |
| thumb.setState(state); |
| } |
| } |
| } |
| |
| /** |
| * Return the drawable used to represent the scroll thumb - the component that |
| * the user can drag back and forth indicating the current value by its position. |
| * |
| * @return The current thumb drawable |
| */ |
| public Drawable getThumb() { |
| return mThumb; |
| } |
| |
| /** |
| * Applies a tint to the thumb drawable. Does not modify the current tint |
| * mode, which is {@link PorterDuff.Mode#SRC_IN} by default. |
| * <p> |
| * Subsequent calls to {@link #setThumb(Drawable)} will automatically |
| * mutate the drawable and apply the specified tint and tint mode using |
| * {@link Drawable#setTintList(ColorStateList)}. |
| * |
| * @param tint the tint to apply, may be {@code null} to clear tint |
| * |
| * @attr ref android.R.styleable#SeekBar_thumbTint |
| * @see #getThumbTintList() |
| * @see Drawable#setTintList(ColorStateList) |
| */ |
| public void setThumbTintList(@Nullable ColorStateList tint) { |
| mThumbTintList = tint; |
| mHasThumbTint = true; |
| |
| applyThumbTint(); |
| } |
| |
| /** |
| * Returns the tint applied to the thumb drawable, if specified. |
| * |
| * @return the tint applied to the thumb drawable |
| * @attr ref android.R.styleable#SeekBar_thumbTint |
| * @see #setThumbTintList(ColorStateList) |
| */ |
| @Nullable |
| public ColorStateList getThumbTintList() { |
| return mThumbTintList; |
| } |
| |
| /** |
| * Specifies the blending mode used to apply the tint specified by |
| * {@link #setThumbTintList(ColorStateList)}} to the thumb drawable. The |
| * default mode is {@link PorterDuff.Mode#SRC_IN}. |
| * |
| * @param tintMode the blending mode used to apply the tint, may be |
| * {@code null} to clear tint |
| * |
| * @attr ref android.R.styleable#SeekBar_thumbTintMode |
| * @see #getThumbTintMode() |
| * @see Drawable#setTintMode(PorterDuff.Mode) |
| */ |
| public void setThumbTintMode(@Nullable PorterDuff.Mode tintMode) { |
| mThumbTintMode = tintMode; |
| mHasThumbTintMode = true; |
| |
| applyThumbTint(); |
| } |
| |
| /** |
| * Returns the blending mode used to apply the tint to the thumb drawable, |
| * if specified. |
| * |
| * @return the blending mode used to apply the tint to the thumb drawable |
| * @attr ref android.R.styleable#SeekBar_thumbTintMode |
| * @see #setThumbTintMode(PorterDuff.Mode) |
| */ |
| @Nullable |
| public PorterDuff.Mode getThumbTintMode() { |
| return mThumbTintMode; |
| } |
| |
| private void applyThumbTint() { |
| if (mThumb != null && (mHasThumbTint || mHasThumbTintMode)) { |
| mThumb = mThumb.mutate(); |
| |
| if (mHasThumbTint) { |
| mThumb.setTintList(mThumbTintList); |
| } |
| |
| if (mHasThumbTintMode) { |
| mThumb.setTintMode(mThumbTintMode); |
| } |
| |
| // The drawable (or one of its children) may not have been |
| // stateful before applying the tint, so let's try again. |
| if (mThumb.isStateful()) { |
| mThumb.setState(getDrawableState()); |
| } |
| } |
| } |
| |
| /** |
| * @see #setThumbOffset(int) |
| */ |
| public int getThumbOffset() { |
| return mThumbOffset; |
| } |
| |
| /** |
| * Sets the thumb offset that allows the thumb to extend out of the range of |
| * the track. |
| * |
| * @param thumbOffset The offset amount in pixels. |
| */ |
| public void setThumbOffset(int thumbOffset) { |
| mThumbOffset = thumbOffset; |
| invalidate(); |
| } |
| |
| /** |
| * Specifies whether the track should be split by the thumb. When true, |
| * the thumb's optical bounds will be clipped out of the track drawable, |
| * then the thumb will be drawn into the resulting gap. |
| * |
| * @param splitTrack Whether the track should be split by the thumb |
| */ |
| public void setSplitTrack(boolean splitTrack) { |
| mSplitTrack = splitTrack; |
| invalidate(); |
| } |
| |
| /** |
| * Returns whether the track should be split by the thumb. |
| */ |
| public boolean getSplitTrack() { |
| return mSplitTrack; |
| } |
| |
| /** |
| * Sets the amount of progress changed via the arrow keys. |
| * |
| * @param increment The amount to increment or decrement when the user |
| * presses the arrow keys. |
| */ |
| public void setKeyProgressIncrement(int increment) { |
| mKeyProgressIncrement = increment < 0 ? -increment : increment; |
| } |
| |
| /** |
| * Returns the amount of progress changed via the arrow keys. |
| * <p> |
| * By default, this will be a value that is derived from the max progress. |
| * |
| * @return The amount to increment or decrement when the user presses the |
| * arrow keys. This will be positive. |
| */ |
| public int getKeyProgressIncrement() { |
| return mKeyProgressIncrement; |
| } |
| |
| @Override |
| public synchronized void setMax(int max) { |
| super.setMax(max); |
| |
| if ((mKeyProgressIncrement == 0) || (getMax() / mKeyProgressIncrement > 20)) { |
| // It will take the user too long to change this via keys, change it |
| // to something more reasonable |
| setKeyProgressIncrement(Math.max(1, Math.round((float) getMax() / 20))); |
| } |
| } |
| |
| @Override |
| protected boolean verifyDrawable(Drawable who) { |
| return who == mThumb || super.verifyDrawable(who); |
| } |
| |
| @Override |
| public void jumpDrawablesToCurrentState() { |
| super.jumpDrawablesToCurrentState(); |
| |
| if (mThumb != null) { |
| mThumb.jumpToCurrentState(); |
| } |
| } |
| |
| @Override |
| protected void drawableStateChanged() { |
| super.drawableStateChanged(); |
| |
| final Drawable progressDrawable = getProgressDrawable(); |
| if (progressDrawable != null && mDisabledAlpha < 1.0f) { |
| progressDrawable.setAlpha(isEnabled() ? NO_ALPHA : (int) (NO_ALPHA * mDisabledAlpha)); |
| } |
| |
| final Drawable thumb = mThumb; |
| if (thumb != null && thumb.isStateful() |
| && thumb.setState(getDrawableState())) { |
| invalidateDrawable(thumb); |
| } |
| } |
| |
| @Override |
| public void drawableHotspotChanged(float x, float y) { |
| super.drawableHotspotChanged(x, y); |
| |
| if (mThumb != null) { |
| mThumb.setHotspot(x, y); |
| } |
| } |
| |
| @Override |
| void onVisualProgressChanged(int id, float scale) { |
| super.onVisualProgressChanged(id, scale); |
| |
| if (id == R.id.progress) { |
| final Drawable thumb = mThumb; |
| if (thumb != null) { |
| setThumbPos(getWidth(), thumb, scale, Integer.MIN_VALUE); |
| |
| // Since we draw translated, the drawable's bounds that it signals |
| // for invalidation won't be the actual bounds we want invalidated, |
| // so just invalidate this whole view. |
| invalidate(); |
| } |
| } |
| } |
| |
| @Override |
| protected void onSizeChanged(int w, int h, int oldw, int oldh) { |
| super.onSizeChanged(w, h, oldw, oldh); |
| |
| updateThumbAndTrackPos(w, h); |
| } |
| |
| private void updateThumbAndTrackPos(int w, int h) { |
| final int paddedHeight = h - mPaddingTop - mPaddingBottom; |
| final Drawable track = getCurrentDrawable(); |
| final Drawable thumb = mThumb; |
| |
| // The max height does not incorporate padding, whereas the height |
| // parameter does. |
| final int trackHeight = Math.min(mMaxHeight, paddedHeight); |
| final int thumbHeight = thumb == null ? 0 : thumb.getIntrinsicHeight(); |
| |
| // Apply offset to whichever item is taller. |
| final int trackOffset; |
| final int thumbOffset; |
| if (thumbHeight > trackHeight) { |
| final int offsetHeight = (paddedHeight - thumbHeight) / 2; |
| trackOffset = offsetHeight + (thumbHeight - trackHeight) / 2; |
| thumbOffset = offsetHeight + 0; |
| } else { |
| final int offsetHeight = (paddedHeight - trackHeight) / 2; |
| trackOffset = offsetHeight + 0; |
| thumbOffset = offsetHeight + (trackHeight - thumbHeight) / 2; |
| } |
| |
| if (track != null) { |
| final int trackWidth = w - mPaddingRight - mPaddingLeft; |
| track.setBounds(0, trackOffset, trackWidth, trackOffset + trackHeight); |
| } |
| |
| if (thumb != null) { |
| setThumbPos(w, thumb, getScale(), thumbOffset); |
| } |
| } |
| |
| private float getScale() { |
| final int max = getMax(); |
| return max > 0 ? getProgress() / (float) max : 0; |
| } |
| |
| /** |
| * Updates the thumb drawable bounds. |
| * |
| * @param w Width of the view, including padding |
| * @param thumb Drawable used for the thumb |
| * @param scale Current progress between 0 and 1 |
| * @param offset Vertical offset for centering. If set to |
| * {@link Integer#MIN_VALUE}, the current offset will be used. |
| */ |
| private void setThumbPos(int w, Drawable thumb, float scale, int offset) { |
| int available = w - mPaddingLeft - mPaddingRight; |
| final int thumbWidth = thumb.getIntrinsicWidth(); |
| final int thumbHeight = thumb.getIntrinsicHeight(); |
| available -= thumbWidth; |
| |
| // The extra space for the thumb to move on the track |
| available += mThumbOffset * 2; |
| |
| final int thumbPos = (int) (scale * available + 0.5f); |
| |
| final int top, bottom; |
| if (offset == Integer.MIN_VALUE) { |
| final Rect oldBounds = thumb.getBounds(); |
| top = oldBounds.top; |
| bottom = oldBounds.bottom; |
| } else { |
| top = offset; |
| bottom = offset + thumbHeight; |
| } |
| |
| final int left = (isLayoutRtl() && mMirrorForRtl) ? available - thumbPos : thumbPos; |
| final int right = left + thumbWidth; |
| |
| final Drawable background = getBackground(); |
| if (background != null) { |
| final int offsetX = mPaddingLeft - mThumbOffset; |
| final int offsetY = mPaddingTop; |
| background.setHotspotBounds(left + offsetX, top + offsetY, |
| right + offsetX, bottom + offsetY); |
| } |
| |
| // Canvas will be translated, so 0,0 is where we start drawing |
| thumb.setBounds(left, top, right, bottom); |
| } |
| |
| /** |
| * @hide |
| */ |
| @Override |
| public void onResolveDrawables(int layoutDirection) { |
| super.onResolveDrawables(layoutDirection); |
| |
| if (mThumb != null) { |
| mThumb.setLayoutDirection(layoutDirection); |
| } |
| } |
| |
| @Override |
| protected synchronized void onDraw(Canvas canvas) { |
| super.onDraw(canvas); |
| drawThumb(canvas); |
| |
| } |
| |
| @Override |
| void drawTrack(Canvas canvas) { |
| final Drawable thumbDrawable = mThumb; |
| if (thumbDrawable != null && mSplitTrack) { |
| final Insets insets = thumbDrawable.getOpticalInsets(); |
| final Rect tempRect = mTempRect; |
| thumbDrawable.copyBounds(tempRect); |
| tempRect.offset(mPaddingLeft - mThumbOffset, mPaddingTop); |
| tempRect.left += insets.left; |
| tempRect.right -= insets.right; |
| |
| final int saveCount = canvas.save(); |
| canvas.clipRect(tempRect, Op.DIFFERENCE); |
| super.drawTrack(canvas); |
| canvas.restoreToCount(saveCount); |
| } else { |
| super.drawTrack(canvas); |
| } |
| } |
| |
| /** |
| * Draw the thumb. |
| */ |
| void drawThumb(Canvas canvas) { |
| if (mThumb != null) { |
| canvas.save(); |
| // Translate the padding. For the x, we need to allow the thumb to |
| // draw in its extra space |
| canvas.translate(mPaddingLeft - mThumbOffset, mPaddingTop); |
| mThumb.draw(canvas); |
| canvas.restore(); |
| } |
| } |
| |
| @Override |
| protected synchronized void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { |
| Drawable d = getCurrentDrawable(); |
| |
| int thumbHeight = mThumb == null ? 0 : mThumb.getIntrinsicHeight(); |
| int dw = 0; |
| int dh = 0; |
| if (d != null) { |
| dw = Math.max(mMinWidth, Math.min(mMaxWidth, d.getIntrinsicWidth())); |
| dh = Math.max(mMinHeight, Math.min(mMaxHeight, d.getIntrinsicHeight())); |
| dh = Math.max(thumbHeight, dh); |
| } |
| dw += mPaddingLeft + mPaddingRight; |
| dh += mPaddingTop + mPaddingBottom; |
| |
| setMeasuredDimension(resolveSizeAndState(dw, widthMeasureSpec, 0), |
| resolveSizeAndState(dh, heightMeasureSpec, 0)); |
| } |
| |
| @Override |
| public boolean onTouchEvent(MotionEvent event) { |
| if (!mIsUserSeekable || !isEnabled()) { |
| return false; |
| } |
| |
| switch (event.getAction()) { |
| case MotionEvent.ACTION_DOWN: |
| if (isInScrollingContainer()) { |
| mTouchDownX = event.getX(); |
| } else { |
| setPressed(true); |
| if (mThumb != null) { |
| invalidate(mThumb.getBounds()); // This may be within the padding region |
| } |
| onStartTrackingTouch(); |
| trackTouchEvent(event); |
| attemptClaimDrag(); |
| } |
| break; |
| |
| case MotionEvent.ACTION_MOVE: |
| if (mIsDragging) { |
| trackTouchEvent(event); |
| } else { |
| final float x = event.getX(); |
| if (Math.abs(x - mTouchDownX) > mScaledTouchSlop) { |
| setPressed(true); |
| if (mThumb != null) { |
| invalidate(mThumb.getBounds()); // This may be within the padding region |
| } |
| onStartTrackingTouch(); |
| trackTouchEvent(event); |
| attemptClaimDrag(); |
| } |
| } |
| break; |
| |
| case MotionEvent.ACTION_UP: |
| if (mIsDragging) { |
| trackTouchEvent(event); |
| onStopTrackingTouch(); |
| setPressed(false); |
| } else { |
| // Touch up when we never crossed the touch slop threshold should |
| // be interpreted as a tap-seek to that location. |
| onStartTrackingTouch(); |
| trackTouchEvent(event); |
| onStopTrackingTouch(); |
| } |
| // ProgressBar doesn't know to repaint the thumb drawable |
| // in its inactive state when the touch stops (because the |
| // value has not apparently changed) |
| invalidate(); |
| break; |
| |
| case MotionEvent.ACTION_CANCEL: |
| if (mIsDragging) { |
| onStopTrackingTouch(); |
| setPressed(false); |
| } |
| invalidate(); // see above explanation |
| break; |
| } |
| return true; |
| } |
| |
| private void setHotspot(float x, float y) { |
| final Drawable bg = getBackground(); |
| if (bg != null) { |
| bg.setHotspot(x, y); |
| } |
| } |
| |
| private void trackTouchEvent(MotionEvent event) { |
| final int width = getWidth(); |
| final int available = width - mPaddingLeft - mPaddingRight; |
| final int x = (int) event.getX(); |
| float scale; |
| float progress = 0; |
| if (isLayoutRtl() && mMirrorForRtl) { |
| if (x > width - mPaddingRight) { |
| scale = 0.0f; |
| } else if (x < mPaddingLeft) { |
| scale = 1.0f; |
| } else { |
| scale = (float)(available - x + mPaddingLeft) / (float)available; |
| progress = mTouchProgressOffset; |
| } |
| } else { |
| if (x < mPaddingLeft) { |
| scale = 0.0f; |
| } else if (x > width - mPaddingRight) { |
| scale = 1.0f; |
| } else { |
| scale = (float)(x - mPaddingLeft) / (float)available; |
| progress = mTouchProgressOffset; |
| } |
| } |
| final int max = getMax(); |
| progress += scale * max; |
| |
| setHotspot(x, (int) event.getY()); |
| setProgressInternal((int) progress, true, false); |
| } |
| |
| /** |
| * Tries to claim the user's drag motion, and requests disallowing any |
| * ancestors from stealing events in the drag. |
| */ |
| private void attemptClaimDrag() { |
| if (mParent != null) { |
| mParent.requestDisallowInterceptTouchEvent(true); |
| } |
| } |
| |
| /** |
| * This is called when the user has started touching this widget. |
| */ |
| void onStartTrackingTouch() { |
| mIsDragging = true; |
| } |
| |
| /** |
| * This is called when the user either releases his touch or the touch is |
| * canceled. |
| */ |
| void onStopTrackingTouch() { |
| mIsDragging = false; |
| } |
| |
| /** |
| * Called when the user changes the seekbar's progress by using a key event. |
| */ |
| void onKeyChange() { |
| } |
| |
| @Override |
| public boolean onKeyDown(int keyCode, KeyEvent event) { |
| if (isEnabled()) { |
| int increment = mKeyProgressIncrement; |
| switch (keyCode) { |
| case KeyEvent.KEYCODE_DPAD_LEFT: |
| case KeyEvent.KEYCODE_MINUS: |
| increment = -increment; |
| // fallthrough |
| case KeyEvent.KEYCODE_DPAD_RIGHT: |
| case KeyEvent.KEYCODE_PLUS: |
| case KeyEvent.KEYCODE_EQUALS: |
| increment = isLayoutRtl() ? -increment : increment; |
| |
| if (setProgressInternal(getProgress() + increment, true, true)) { |
| onKeyChange(); |
| return true; |
| } |
| break; |
| } |
| } |
| |
| return super.onKeyDown(keyCode, event); |
| } |
| |
| @Override |
| public CharSequence getAccessibilityClassName() { |
| return AbsSeekBar.class.getName(); |
| } |
| |
| /** @hide */ |
| @Override |
| public void onInitializeAccessibilityNodeInfoInternal(AccessibilityNodeInfo info) { |
| super.onInitializeAccessibilityNodeInfoInternal(info); |
| |
| if (isEnabled()) { |
| final int progress = getProgress(); |
| if (progress > 0) { |
| info.addAction(AccessibilityNodeInfo.AccessibilityAction.ACTION_SCROLL_BACKWARD); |
| } |
| if (progress < getMax()) { |
| info.addAction(AccessibilityNodeInfo.AccessibilityAction.ACTION_SCROLL_FORWARD); |
| } |
| } |
| } |
| |
| /** @hide */ |
| @Override |
| public boolean performAccessibilityActionInternal(int action, Bundle arguments) { |
| if (super.performAccessibilityActionInternal(action, arguments)) { |
| return true; |
| } |
| |
| if (!isEnabled()) { |
| return false; |
| } |
| |
| switch (action) { |
| case R.id.accessibilityActionSetProgress: { |
| if (!canUserSetProgress()) { |
| return false; |
| } |
| if (arguments == null || !arguments.containsKey( |
| AccessibilityNodeInfo.ACTION_ARGUMENT_PROGRESS_VALUE)) { |
| return false; |
| } |
| float value = arguments.getFloat( |
| AccessibilityNodeInfo.ACTION_ARGUMENT_PROGRESS_VALUE); |
| return setProgressInternal((int) value, true, true); |
| } |
| case AccessibilityNodeInfo.ACTION_SCROLL_FORWARD: |
| case AccessibilityNodeInfo.ACTION_SCROLL_BACKWARD: { |
| if (!canUserSetProgress()) { |
| return false; |
| } |
| int increment = Math.max(1, Math.round((float) getMax() / 5)); |
| if (action == AccessibilityNodeInfo.ACTION_SCROLL_BACKWARD) { |
| increment = -increment; |
| } |
| |
| // Let progress bar handle clamping values. |
| if (setProgressInternal(getProgress() + increment, true, true)) { |
| onKeyChange(); |
| return true; |
| } |
| return false; |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * @return whether user can change progress on the view |
| */ |
| boolean canUserSetProgress() { |
| return !isIndeterminate() && isEnabled(); |
| } |
| |
| @Override |
| public void onRtlPropertiesChanged(int layoutDirection) { |
| super.onRtlPropertiesChanged(layoutDirection); |
| |
| final Drawable thumb = mThumb; |
| if (thumb != null) { |
| setThumbPos(getWidth(), thumb, getScale(), Integer.MIN_VALUE); |
| |
| // Since we draw translated, the drawable's bounds that it signals |
| // for invalidation won't be the actual bounds we want invalidated, |
| // so just invalidate this whole view. |
| invalidate(); |
| } |
| } |
| } |
