| /* |
| * Copyright (C) 2013 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.graphics.drawable; |
| |
| import android.annotation.NonNull; |
| import android.annotation.Nullable; |
| import android.content.res.ColorStateList; |
| import android.content.res.Resources; |
| import android.content.res.Resources.Theme; |
| import android.content.res.TypedArray; |
| import android.graphics.Canvas; |
| import android.graphics.Color; |
| import android.graphics.ColorFilter; |
| import android.graphics.Outline; |
| import android.graphics.Paint; |
| import android.graphics.PixelFormat; |
| import android.graphics.PorterDuff.Mode; |
| import android.graphics.PorterDuffXfermode; |
| import android.graphics.Rect; |
| import android.util.AttributeSet; |
| import android.util.DisplayMetrics; |
| |
| import com.android.internal.R; |
| |
| import org.xmlpull.v1.XmlPullParser; |
| import org.xmlpull.v1.XmlPullParserException; |
| |
| import java.io.IOException; |
| import java.util.Arrays; |
| |
| /** |
| * Drawable that shows a ripple effect in response to state changes. The |
| * anchoring position of the ripple for a given state may be specified by |
| * calling {@link #setHotspot(float, float)} with the corresponding state |
| * attribute identifier. |
| * <p> |
| * A touch feedback drawable may contain multiple child layers, including a |
| * special mask layer that is not drawn to the screen. A single layer may be set |
| * as the mask by specifying its android:id value as {@link android.R.id#mask}. |
| * <pre> |
| * <code><!-- A red ripple masked against an opaque rectangle. --/> |
| * <ripple android:color="#ffff0000"> |
| * <item android:id="@android:id/mask" |
| * android:drawable="@android:color/white" /> |
| * <ripple /></code> |
| * </pre> |
| * <p> |
| * If a mask layer is set, the ripple effect will be masked against that layer |
| * before it is drawn over the composite of the remaining child layers. |
| * <p> |
| * If no mask layer is set, the ripple effect is masked against the composite |
| * of the child layers. |
| * <pre> |
| * <code><!-- A blue ripple drawn atop a black rectangle. --/> |
| * <ripple android:color="#ff00ff00"> |
| * <item android:drawable="@android:color/black" /> |
| * <ripple /> |
| * |
| * <!-- A red ripple drawn atop a drawable resource. --/> |
| * <ripple android:color="#ff00ff00"> |
| * <item android:drawable="@drawable/my_drawable" /> |
| * <ripple /></code> |
| * </pre> |
| * <p> |
| * If no child layers or mask is specified and the ripple is set as a View |
| * background, the ripple will be drawn atop the first available parent |
| * background within the View's hierarchy. In this case, the drawing region |
| * may extend outside of the Drawable bounds. |
| * <pre> |
| * <code><!-- An unbounded green ripple. --/> |
| * <ripple android:color="#ff0000ff" /></code> |
| * </pre> |
| * |
| * @attr ref android.R.styleable#RippleDrawable_color |
| */ |
| public class RippleDrawable extends LayerDrawable { |
| private static final PorterDuffXfermode DST_IN = new PorterDuffXfermode(Mode.DST_IN); |
| private static final PorterDuffXfermode SRC_ATOP = new PorterDuffXfermode(Mode.SRC_ATOP); |
| private static final PorterDuffXfermode SRC_OVER = new PorterDuffXfermode(Mode.SRC_OVER); |
| |
| /** |
| * Constant for automatically determining the maximum ripple radius. |
| * |
| * @see #setMaxRadius(int) |
| * @hide |
| */ |
| public static final int RADIUS_AUTO = -1; |
| |
| /** The maximum number of ripples supported. */ |
| private static final int MAX_RIPPLES = 10; |
| |
| private final Rect mTempRect = new Rect(); |
| |
| /** Current ripple effect bounds, used to constrain ripple effects. */ |
| private final Rect mHotspotBounds = new Rect(); |
| |
| /** Current drawing bounds, used to compute dirty region. */ |
| private final Rect mDrawingBounds = new Rect(); |
| |
| /** Current dirty bounds, union of current and previous drawing bounds. */ |
| private final Rect mDirtyBounds = new Rect(); |
| |
| /** Mirrors mLayerState with some extra information. */ |
| private RippleState mState; |
| |
| /** The masking layer, e.g. the layer with id R.id.mask. */ |
| private Drawable mMask; |
| |
| /** The current background. May be actively animating or pending entry. */ |
| private RippleBackground mBackground; |
| |
| /** Whether we expect to draw a background when visible. */ |
| private boolean mBackgroundActive; |
| |
| /** The current ripple. May be actively animating or pending entry. */ |
| private Ripple mRipple; |
| |
| /** Whether we expect to draw a ripple when visible. */ |
| private boolean mRippleActive; |
| |
| // Hotspot coordinates that are awaiting activation. |
| private float mPendingX; |
| private float mPendingY; |
| private boolean mHasPending; |
| |
| /** |
| * Lazily-created array of actively animating ripples. Inactive ripples are |
| * pruned during draw(). The locations of these will not change. |
| */ |
| private Ripple[] mExitingRipples; |
| private int mExitingRipplesCount = 0; |
| |
| /** Paint used to control appearance of ripples. */ |
| private Paint mRipplePaint; |
| |
| /** Paint used to control reveal layer masking. */ |
| private Paint mMaskingPaint; |
| |
| /** Target density of the display into which ripples are drawn. */ |
| private float mDensity = 1.0f; |
| |
| /** Whether bounds are being overridden. */ |
| private boolean mOverrideBounds; |
| |
| /** |
| * Whether the next draw MUST draw something to canvas. Used to work around |
| * a bug in hardware invalidation following a render thread-accelerated |
| * animation. |
| */ |
| private boolean mNeedsDraw; |
| |
| /** |
| * Constructor used for drawable inflation. |
| */ |
| RippleDrawable() { |
| this(new RippleState(null, null, null), null, null); |
| } |
| |
| /** |
| * Creates a new ripple drawable with the specified ripple color and |
| * optional content and mask drawables. |
| * |
| * @param color The ripple color |
| * @param content The content drawable, may be {@code null} |
| * @param mask The mask drawable, may be {@code null} |
| */ |
| public RippleDrawable(@NonNull ColorStateList color, @Nullable Drawable content, |
| @Nullable Drawable mask) { |
| this(new RippleState(null, null, null), null, null); |
| |
| if (color == null) { |
| throw new IllegalArgumentException("RippleDrawable requires a non-null color"); |
| } |
| |
| if (content != null) { |
| addLayer(content, null, 0, 0, 0, 0, 0); |
| } |
| |
| if (mask != null) { |
| addLayer(mask, null, android.R.id.mask, 0, 0, 0, 0); |
| } |
| |
| setColor(color); |
| ensurePadding(); |
| initializeFromState(); |
| } |
| |
| @Override |
| public void jumpToCurrentState() { |
| super.jumpToCurrentState(); |
| |
| boolean needsDraw = false; |
| |
| if (mRipple != null) { |
| needsDraw |= mRipple.isHardwareAnimating(); |
| mRipple.jump(); |
| } |
| |
| if (mBackground != null) { |
| needsDraw |= mBackground.isHardwareAnimating(); |
| mBackground.jump(); |
| } |
| |
| needsDraw |= cancelExitingRipples(); |
| |
| mNeedsDraw = needsDraw; |
| invalidateSelf(); |
| } |
| |
| private boolean cancelExitingRipples() { |
| boolean needsDraw = false; |
| |
| final int count = mExitingRipplesCount; |
| final Ripple[] ripples = mExitingRipples; |
| for (int i = 0; i < count; i++) { |
| needsDraw |= ripples[i].isHardwareAnimating(); |
| ripples[i].cancel(); |
| } |
| |
| if (ripples != null) { |
| Arrays.fill(ripples, 0, count, null); |
| } |
| mExitingRipplesCount = 0; |
| |
| return needsDraw; |
| } |
| |
| @Override |
| public void setAlpha(int alpha) { |
| super.setAlpha(alpha); |
| |
| // TODO: Should we support this? |
| } |
| |
| @Override |
| public void setColorFilter(ColorFilter cf) { |
| super.setColorFilter(cf); |
| |
| // TODO: Should we support this? |
| } |
| |
| @Override |
| public int getOpacity() { |
| // Worst-case scenario. |
| return PixelFormat.TRANSLUCENT; |
| } |
| |
| @Override |
| protected boolean onStateChange(int[] stateSet) { |
| final boolean changed = super.onStateChange(stateSet); |
| |
| boolean enabled = false; |
| boolean pressed = false; |
| boolean focused = false; |
| |
| for (int state : stateSet) { |
| if (state == R.attr.state_enabled) { |
| enabled = true; |
| } |
| if (state == R.attr.state_focused) { |
| focused = true; |
| } |
| if (state == R.attr.state_pressed) { |
| pressed = true; |
| } |
| } |
| |
| setRippleActive(enabled && pressed); |
| setBackgroundActive(focused || (enabled && pressed)); |
| |
| return changed; |
| } |
| |
| private void setRippleActive(boolean active) { |
| if (mRippleActive != active) { |
| mRippleActive = active; |
| if (active) { |
| tryRippleEnter(); |
| } else { |
| tryRippleExit(); |
| } |
| } |
| } |
| |
| private void setBackgroundActive(boolean active) { |
| if (mBackgroundActive != active) { |
| mBackgroundActive = active; |
| if (active) { |
| tryBackgroundEnter(); |
| } else { |
| tryBackgroundExit(); |
| } |
| } |
| } |
| |
| @Override |
| protected void onBoundsChange(Rect bounds) { |
| super.onBoundsChange(bounds); |
| |
| if (!mOverrideBounds) { |
| mHotspotBounds.set(bounds); |
| onHotspotBoundsChanged(); |
| } |
| |
| invalidateSelf(); |
| } |
| |
| @Override |
| public boolean setVisible(boolean visible, boolean restart) { |
| final boolean changed = super.setVisible(visible, restart); |
| |
| if (!visible) { |
| clearHotspots(); |
| } else if (changed) { |
| // If we just became visible, ensure the background and ripple |
| // visibilities are consistent with their internal states. |
| if (mRippleActive) { |
| tryRippleEnter(); |
| } |
| |
| if (mBackgroundActive) { |
| tryBackgroundEnter(); |
| } |
| } |
| |
| return changed; |
| } |
| |
| /** |
| * @hide |
| */ |
| @Override |
| public boolean isProjected() { |
| return getNumberOfLayers() == 0; |
| } |
| |
| @Override |
| public boolean isStateful() { |
| return true; |
| } |
| |
| public void setColor(ColorStateList color) { |
| mState.mColor = color; |
| invalidateSelf(); |
| } |
| |
| @Override |
| public void inflate(Resources r, XmlPullParser parser, AttributeSet attrs, Theme theme) |
| throws XmlPullParserException, IOException { |
| final TypedArray a = obtainAttributes(r, theme, attrs, R.styleable.RippleDrawable); |
| updateStateFromTypedArray(a); |
| a.recycle(); |
| |
| // Force padding default to STACK before inflating. |
| setPaddingMode(PADDING_MODE_STACK); |
| |
| super.inflate(r, parser, attrs, theme); |
| |
| setTargetDensity(r.getDisplayMetrics()); |
| initializeFromState(); |
| } |
| |
| @Override |
| public boolean setDrawableByLayerId(int id, Drawable drawable) { |
| if (super.setDrawableByLayerId(id, drawable)) { |
| if (id == R.id.mask) { |
| mMask = drawable; |
| } |
| |
| return true; |
| } |
| |
| return false; |
| } |
| |
| /** |
| * Specifies how layer padding should affect the bounds of subsequent |
| * layers. The default and recommended value for RippleDrawable is |
| * {@link #PADDING_MODE_STACK}. |
| * |
| * @param mode padding mode, one of: |
| * <ul> |
| * <li>{@link #PADDING_MODE_NEST} to nest each layer inside the |
| * padding of the previous layer |
| * <li>{@link #PADDING_MODE_STACK} to stack each layer directly |
| * atop the previous layer |
| * </ul> |
| * @see #getPaddingMode() |
| */ |
| @Override |
| public void setPaddingMode(int mode) { |
| super.setPaddingMode(mode); |
| } |
| |
| /** |
| * Initializes the constant state from the values in the typed array. |
| */ |
| private void updateStateFromTypedArray(TypedArray a) throws XmlPullParserException { |
| final RippleState state = mState; |
| |
| // Account for any configuration changes. |
| state.mChangingConfigurations |= a.getChangingConfigurations(); |
| |
| // Extract the theme attributes, if any. |
| state.mTouchThemeAttrs = a.extractThemeAttrs(); |
| |
| final ColorStateList color = a.getColorStateList(R.styleable.RippleDrawable_color); |
| if (color != null) { |
| mState.mColor = color; |
| } |
| |
| verifyRequiredAttributes(a); |
| } |
| |
| private void verifyRequiredAttributes(TypedArray a) throws XmlPullParserException { |
| if (mState.mColor == null && (mState.mTouchThemeAttrs == null |
| || mState.mTouchThemeAttrs[R.styleable.RippleDrawable_color] == 0)) { |
| throw new XmlPullParserException(a.getPositionDescription() + |
| ": <ripple> requires a valid color attribute"); |
| } |
| } |
| |
| /** |
| * Set the density at which this drawable will be rendered. |
| * |
| * @param metrics The display metrics for this drawable. |
| */ |
| private void setTargetDensity(DisplayMetrics metrics) { |
| if (mDensity != metrics.density) { |
| mDensity = metrics.density; |
| invalidateSelf(); |
| } |
| } |
| |
| @Override |
| public void applyTheme(Theme t) { |
| super.applyTheme(t); |
| |
| final RippleState state = mState; |
| if (state == null || state.mTouchThemeAttrs == null) { |
| return; |
| } |
| |
| final TypedArray a = t.resolveAttributes(state.mTouchThemeAttrs, |
| R.styleable.RippleDrawable); |
| try { |
| updateStateFromTypedArray(a); |
| } catch (XmlPullParserException e) { |
| throw new RuntimeException(e); |
| } finally { |
| a.recycle(); |
| } |
| |
| initializeFromState(); |
| } |
| |
| @Override |
| public boolean canApplyTheme() { |
| return super.canApplyTheme() || mState != null && mState.mTouchThemeAttrs != null; |
| } |
| |
| @Override |
| public void setHotspot(float x, float y) { |
| if (mRipple == null || mBackground == null) { |
| mPendingX = x; |
| mPendingY = y; |
| mHasPending = true; |
| } |
| |
| if (mRipple != null) { |
| mRipple.move(x, y); |
| } |
| } |
| |
| /** |
| * Creates an active hotspot at the specified location. |
| */ |
| private void tryBackgroundEnter() { |
| if (mBackground == null) { |
| mBackground = new RippleBackground(this, mHotspotBounds); |
| } |
| |
| final int color = mState.mColor.getColorForState(getState(), Color.TRANSPARENT); |
| mBackground.setup(mState.mMaxRadius, color, mDensity); |
| mBackground.enter(); |
| } |
| |
| private void tryBackgroundExit() { |
| if (mBackground != null) { |
| // Don't null out the background, we need it to draw! |
| mBackground.exit(); |
| } |
| } |
| |
| /** |
| * Attempts to start an enter animation for the active hotspot. Fails if |
| * there are too many animating ripples. |
| */ |
| private void tryRippleEnter() { |
| if (mExitingRipplesCount >= MAX_RIPPLES) { |
| // This should never happen unless the user is tapping like a maniac |
| // or there is a bug that's preventing ripples from being removed. |
| return; |
| } |
| |
| if (mRipple == null) { |
| final float x; |
| final float y; |
| if (mHasPending) { |
| mHasPending = false; |
| x = mPendingX; |
| y = mPendingY; |
| } else { |
| x = mHotspotBounds.exactCenterX(); |
| y = mHotspotBounds.exactCenterY(); |
| } |
| mRipple = new Ripple(this, mHotspotBounds, x, y); |
| } |
| |
| final int color = mState.mColor.getColorForState(getState(), Color.TRANSPARENT); |
| mRipple.setup(mState.mMaxRadius, color, mDensity); |
| mRipple.enter(); |
| } |
| |
| /** |
| * Attempts to start an exit animation for the active hotspot. Fails if |
| * there is no active hotspot. |
| */ |
| private void tryRippleExit() { |
| if (mRipple != null) { |
| if (mExitingRipples == null) { |
| mExitingRipples = new Ripple[MAX_RIPPLES]; |
| } |
| mExitingRipples[mExitingRipplesCount++] = mRipple; |
| mRipple.exit(); |
| mRipple = null; |
| } |
| } |
| |
| /** |
| * Cancels and removes the active ripple, all exiting ripples, and the |
| * background. Nothing will be drawn after this method is called. |
| */ |
| private void clearHotspots() { |
| boolean needsDraw = false; |
| |
| if (mRipple != null) { |
| needsDraw |= mRipple.isHardwareAnimating(); |
| mRipple.cancel(); |
| mRipple = null; |
| } |
| |
| if (mBackground != null) { |
| needsDraw |= mBackground.isHardwareAnimating(); |
| mBackground.cancel(); |
| mBackground = null; |
| } |
| |
| needsDraw |= cancelExitingRipples(); |
| |
| mNeedsDraw = needsDraw; |
| invalidateSelf(); |
| } |
| |
| @Override |
| public void setHotspotBounds(int left, int top, int right, int bottom) { |
| mOverrideBounds = true; |
| mHotspotBounds.set(left, top, right, bottom); |
| |
| onHotspotBoundsChanged(); |
| } |
| |
| /** @hide */ |
| @Override |
| public void getHotspotBounds(Rect outRect) { |
| outRect.set(mHotspotBounds); |
| } |
| |
| /** |
| * Notifies all the animating ripples that the hotspot bounds have changed. |
| */ |
| private void onHotspotBoundsChanged() { |
| final int count = mExitingRipplesCount; |
| final Ripple[] ripples = mExitingRipples; |
| for (int i = 0; i < count; i++) { |
| ripples[i].onHotspotBoundsChanged(); |
| } |
| |
| if (mRipple != null) { |
| mRipple.onHotspotBoundsChanged(); |
| } |
| |
| if (mBackground != null) { |
| mBackground.onHotspotBoundsChanged(); |
| } |
| } |
| |
| /** |
| * Populates <code>outline</code> with the first available layer outline, |
| * excluding the mask layer. |
| * |
| * @param outline Outline in which to place the first available layer outline |
| */ |
| @Override |
| public void getOutline(@NonNull Outline outline) { |
| final LayerState state = mLayerState; |
| final ChildDrawable[] children = state.mChildren; |
| final int N = state.mNum; |
| for (int i = 0; i < N; i++) { |
| if (children[i].mId != R.id.mask) { |
| children[i].mDrawable.getOutline(outline); |
| if (!outline.isEmpty()) return; |
| } |
| } |
| } |
| |
| @Override |
| public void draw(@NonNull Canvas canvas) { |
| final boolean hasMask = mMask != null; |
| final boolean drawNonMaskContent = mLayerState.mNum > (hasMask ? 1 : 0); |
| final boolean drawMask = hasMask && mMask.getOpacity() != PixelFormat.OPAQUE; |
| final Rect bounds = getDirtyBounds(); |
| final int saveCount = canvas.save(Canvas.CLIP_SAVE_FLAG); |
| canvas.clipRect(bounds); |
| |
| // If we have content, draw it into a layer first. |
| final int contentLayer; |
| if (drawNonMaskContent) { |
| contentLayer = drawContentLayer(canvas, bounds, SRC_OVER); |
| } else { |
| contentLayer = -1; |
| } |
| |
| // Next, try to draw the ripples (into a layer if necessary). If we need |
| // to mask against the underlying content, set the xfermode to SRC_ATOP. |
| final PorterDuffXfermode xfermode = (hasMask || !drawNonMaskContent) ? SRC_OVER : SRC_ATOP; |
| |
| // If we have a background and a non-opaque mask, draw the masking layer. |
| final int backgroundLayer = drawBackgroundLayer(canvas, bounds, xfermode, drawMask); |
| if (backgroundLayer >= 0) { |
| if (drawMask) { |
| drawMaskingLayer(canvas, bounds, DST_IN); |
| } |
| canvas.restoreToCount(backgroundLayer); |
| } |
| |
| // If we have ripples and a non-opaque mask, draw the masking layer. |
| final int rippleLayer = drawRippleLayer(canvas, bounds, xfermode); |
| if (rippleLayer >= 0) { |
| if (drawMask) { |
| drawMaskingLayer(canvas, bounds, DST_IN); |
| } |
| canvas.restoreToCount(rippleLayer); |
| } |
| |
| // If we failed to draw anything and we just canceled animations, at |
| // least draw a color so that hardware invalidation works correctly. |
| if (contentLayer < 0 && backgroundLayer < 0 && rippleLayer < 0 && mNeedsDraw) { |
| canvas.drawColor(Color.TRANSPARENT); |
| |
| // Request another draw so we can avoid adding a transparent layer |
| // during the next display list refresh. |
| invalidateSelf(); |
| } |
| mNeedsDraw = false; |
| |
| canvas.restoreToCount(saveCount); |
| } |
| |
| /** |
| * Removes a ripple from the exiting ripple list. |
| * |
| * @param ripple the ripple to remove |
| */ |
| void removeRipple(Ripple ripple) { |
| // Ripple ripple ripple ripple. Ripple ripple. |
| final Ripple[] ripples = mExitingRipples; |
| final int count = mExitingRipplesCount; |
| final int index = getRippleIndex(ripple); |
| if (index >= 0) { |
| System.arraycopy(ripples, index + 1, ripples, index, count - (index + 1)); |
| ripples[count - 1] = null; |
| mExitingRipplesCount--; |
| |
| invalidateSelf(); |
| } |
| } |
| |
| private int getRippleIndex(Ripple ripple) { |
| final Ripple[] ripples = mExitingRipples; |
| final int count = mExitingRipplesCount; |
| for (int i = 0; i < count; i++) { |
| if (ripples[i] == ripple) { |
| return i; |
| } |
| } |
| return -1; |
| } |
| |
| private int drawContentLayer(Canvas canvas, Rect bounds, PorterDuffXfermode mode) { |
| final ChildDrawable[] array = mLayerState.mChildren; |
| final int count = mLayerState.mNum; |
| |
| // We don't need a layer if we don't expect to draw any ripples, we have |
| // an explicit mask, or if the non-mask content is all opaque. |
| boolean needsLayer = false; |
| if ((mExitingRipplesCount > 0 || mBackground != null) && mMask == null) { |
| for (int i = 0; i < count; i++) { |
| if (array[i].mId != R.id.mask |
| && array[i].mDrawable.getOpacity() != PixelFormat.OPAQUE) { |
| needsLayer = true; |
| break; |
| } |
| } |
| } |
| |
| final Paint maskingPaint = getMaskingPaint(mode); |
| final int restoreToCount = needsLayer ? canvas.saveLayer(bounds.left, bounds.top, |
| bounds.right, bounds.bottom, maskingPaint) : -1; |
| |
| // Draw everything except the mask. |
| for (int i = 0; i < count; i++) { |
| if (array[i].mId != R.id.mask) { |
| array[i].mDrawable.draw(canvas); |
| } |
| } |
| |
| return restoreToCount; |
| } |
| |
| private int drawBackgroundLayer( |
| Canvas canvas, Rect bounds, PorterDuffXfermode mode, boolean drawMask) { |
| int saveCount = -1; |
| |
| if (mBackground != null && mBackground.shouldDraw()) { |
| // TODO: We can avoid saveLayer here if we push the xfermode into |
| // the background's render thread animator at exit() time. |
| if (drawMask || mode != SRC_OVER) { |
| saveCount = canvas.saveLayer(bounds.left, bounds.top, bounds.right, |
| bounds.bottom, getMaskingPaint(mode)); |
| } |
| |
| final float x = mHotspotBounds.exactCenterX(); |
| final float y = mHotspotBounds.exactCenterY(); |
| canvas.translate(x, y); |
| mBackground.draw(canvas, getRipplePaint()); |
| canvas.translate(-x, -y); |
| } |
| |
| return saveCount; |
| } |
| |
| private int drawRippleLayer(Canvas canvas, Rect bounds, PorterDuffXfermode mode) { |
| boolean drewRipples = false; |
| int restoreToCount = -1; |
| int restoreTranslate = -1; |
| |
| // Draw ripples and update the animating ripples array. |
| final int count = mExitingRipplesCount; |
| final Ripple[] ripples = mExitingRipples; |
| for (int i = 0; i <= count; i++) { |
| final Ripple ripple; |
| if (i < count) { |
| ripple = ripples[i]; |
| } else if (mRipple != null) { |
| ripple = mRipple; |
| } else { |
| continue; |
| } |
| |
| // If we're masking the ripple layer, make sure we have a layer |
| // first. This will merge SRC_OVER (directly) onto the canvas. |
| if (restoreToCount < 0) { |
| final Paint maskingPaint = getMaskingPaint(mode); |
| final int color = mState.mColor.getColorForState(getState(), Color.TRANSPARENT); |
| final int alpha = Color.alpha(color); |
| maskingPaint.setAlpha(alpha / 2); |
| |
| // TODO: We can avoid saveLayer here if we're only drawing one |
| // ripple and we don't have content or a translucent mask. |
| restoreToCount = canvas.saveLayer(bounds.left, bounds.top, |
| bounds.right, bounds.bottom, maskingPaint); |
| |
| // Translate the canvas to the current hotspot bounds. |
| restoreTranslate = canvas.save(); |
| canvas.translate(mHotspotBounds.exactCenterX(), mHotspotBounds.exactCenterY()); |
| } |
| |
| drewRipples |= ripple.draw(canvas, getRipplePaint()); |
| } |
| |
| // Always restore the translation. |
| if (restoreTranslate >= 0) { |
| canvas.restoreToCount(restoreTranslate); |
| } |
| |
| // If we created a layer with no content, merge it immediately. |
| if (restoreToCount >= 0 && !drewRipples) { |
| canvas.restoreToCount(restoreToCount); |
| restoreToCount = -1; |
| } |
| |
| return restoreToCount; |
| } |
| |
| private int drawMaskingLayer(Canvas canvas, Rect bounds, PorterDuffXfermode mode) { |
| final int restoreToCount = canvas.saveLayer(bounds.left, bounds.top, |
| bounds.right, bounds.bottom, getMaskingPaint(mode)); |
| |
| // Ensure that DST_IN blends using the entire layer. |
| canvas.drawColor(Color.TRANSPARENT); |
| |
| mMask.draw(canvas); |
| |
| return restoreToCount; |
| } |
| |
| private Paint getRipplePaint() { |
| if (mRipplePaint == null) { |
| mRipplePaint = new Paint(); |
| mRipplePaint.setAntiAlias(true); |
| } |
| return mRipplePaint; |
| } |
| |
| private Paint getMaskingPaint(PorterDuffXfermode xfermode) { |
| if (mMaskingPaint == null) { |
| mMaskingPaint = new Paint(); |
| } |
| mMaskingPaint.setXfermode(xfermode); |
| mMaskingPaint.setAlpha(0xFF); |
| return mMaskingPaint; |
| } |
| |
| @Override |
| public Rect getDirtyBounds() { |
| if (isProjected()) { |
| final Rect drawingBounds = mDrawingBounds; |
| final Rect dirtyBounds = mDirtyBounds; |
| dirtyBounds.set(drawingBounds); |
| drawingBounds.setEmpty(); |
| |
| final int cX = (int) mHotspotBounds.exactCenterX(); |
| final int cY = (int) mHotspotBounds.exactCenterY(); |
| final Rect rippleBounds = mTempRect; |
| |
| final Ripple[] activeRipples = mExitingRipples; |
| final int N = mExitingRipplesCount; |
| for (int i = 0; i < N; i++) { |
| activeRipples[i].getBounds(rippleBounds); |
| rippleBounds.offset(cX, cY); |
| drawingBounds.union(rippleBounds); |
| } |
| |
| final RippleBackground background = mBackground; |
| if (background != null) { |
| background.getBounds(rippleBounds); |
| rippleBounds.offset(cX, cY); |
| drawingBounds.union(rippleBounds); |
| } |
| |
| dirtyBounds.union(drawingBounds); |
| dirtyBounds.union(super.getDirtyBounds()); |
| return dirtyBounds; |
| } else { |
| return getBounds(); |
| } |
| } |
| |
| @Override |
| public ConstantState getConstantState() { |
| return mState; |
| } |
| |
| @Override |
| public Drawable mutate() { |
| super.mutate(); |
| |
| // LayerDrawable creates a new state using createConstantState, so |
| // this should always be a safe cast. |
| mState = (RippleState) mLayerState; |
| return this; |
| } |
| |
| @Override |
| RippleState createConstantState(LayerState state, Resources res) { |
| return new RippleState(state, this, res); |
| } |
| |
| static class RippleState extends LayerState { |
| int[] mTouchThemeAttrs; |
| ColorStateList mColor = ColorStateList.valueOf(Color.MAGENTA); |
| int mMaxRadius = RADIUS_AUTO; |
| |
| public RippleState(LayerState orig, RippleDrawable owner, Resources res) { |
| super(orig, owner, res); |
| |
| if (orig != null && orig instanceof RippleState) { |
| final RippleState origs = (RippleState) orig; |
| mTouchThemeAttrs = origs.mTouchThemeAttrs; |
| mColor = origs.mColor; |
| mMaxRadius = origs.mMaxRadius; |
| } |
| } |
| |
| @Override |
| public boolean canApplyTheme() { |
| return mTouchThemeAttrs != null || super.canApplyTheme(); |
| } |
| |
| @Override |
| public Drawable newDrawable() { |
| return new RippleDrawable(this, null, null); |
| } |
| |
| @Override |
| public Drawable newDrawable(Resources res) { |
| return new RippleDrawable(this, res, null); |
| } |
| |
| @Override |
| public Drawable newDrawable(Resources res, Theme theme) { |
| return new RippleDrawable(this, res, theme); |
| } |
| } |
| |
| /** |
| * Sets the maximum ripple radius in pixels. The default value of |
| * {@link #RADIUS_AUTO} defines the radius as the distance from the center |
| * of the drawable bounds (or hotspot bounds, if specified) to a corner. |
| * |
| * @param maxRadius the maximum ripple radius in pixels or |
| * {@link #RADIUS_AUTO} to automatically determine the maximum |
| * radius based on the bounds |
| * @see #getMaxRadius() |
| * @see #setHotspotBounds(int, int, int, int) |
| * @hide |
| */ |
| public void setMaxRadius(int maxRadius) { |
| if (maxRadius != RADIUS_AUTO && maxRadius < 0) { |
| throw new IllegalArgumentException("maxRadius must be RADIUS_AUTO or >= 0"); |
| } |
| |
| mState.mMaxRadius = maxRadius; |
| } |
| |
| /** |
| * @return the maximum ripple radius in pixels, or {@link #RADIUS_AUTO} if |
| * the radius is determined automatically |
| * @see #setMaxRadius(int) |
| * @hide |
| */ |
| public int getMaxRadius() { |
| return mState.mMaxRadius; |
| } |
| |
| private RippleDrawable(RippleState state, Resources res, Theme theme) { |
| boolean needsTheme = false; |
| |
| final RippleState ns; |
| if (theme != null && state != null && state.canApplyTheme()) { |
| ns = new RippleState(state, this, res); |
| needsTheme = true; |
| } else if (state == null) { |
| ns = new RippleState(null, this, res); |
| } else { |
| // We always need a new state since child drawables contain local |
| // state but live within the parent's constant state. |
| // TODO: Move child drawables into local state. |
| ns = new RippleState(state, this, res); |
| } |
| |
| if (res != null) { |
| mDensity = res.getDisplayMetrics().density; |
| } |
| |
| mState = ns; |
| mLayerState = ns; |
| |
| if (ns.mNum > 0) { |
| ensurePadding(); |
| } |
| |
| if (needsTheme) { |
| applyTheme(theme); |
| } |
| |
| initializeFromState(); |
| } |
| |
| private void initializeFromState() { |
| // Initialize from constant state. |
| mMask = findDrawableByLayerId(R.id.mask); |
| } |
| } |