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Diffstat (limited to 'graphics/java/android/graphics/drawable/LayerDrawable.java')
| -rw-r--r-- | graphics/java/android/graphics/drawable/LayerDrawable.java | 661 |
1 files changed, 0 insertions, 661 deletions
diff --git a/graphics/java/android/graphics/drawable/LayerDrawable.java b/graphics/java/android/graphics/drawable/LayerDrawable.java deleted file mode 100644 index c777205..0000000 --- a/graphics/java/android/graphics/drawable/LayerDrawable.java +++ /dev/null @@ -1,661 +0,0 @@ -/* - * Copyright (C) 2006 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 org.xmlpull.v1.XmlPullParser; -import org.xmlpull.v1.XmlPullParserException; - -import android.content.res.Resources; -import android.content.res.TypedArray; -import android.graphics.*; -import android.util.AttributeSet; -import android.view.View; - -import java.io.IOException; - -/** - * A Drawable that manages an array of other Drawables. These are drawn in array - * order, so the element with the largest index will be drawn on top. - * <p> - * It can be defined in an XML file with the <code><layer-list></code> element. - * Each Drawable in the layer is defined in a nested <code><item></code>. - * </p> - * - * @attr ref android.R.styleable#LayerDrawableItem_left - * @attr ref android.R.styleable#LayerDrawableItem_top - * @attr ref android.R.styleable#LayerDrawableItem_right - * @attr ref android.R.styleable#LayerDrawableItem_bottom - * @attr ref android.R.styleable#LayerDrawableItem_drawable - * @attr ref android.R.styleable#LayerDrawableItem_id -*/ -public class LayerDrawable extends Drawable implements Drawable.Callback { - LayerState mLayerState; - - private int[] mPaddingL; - private int[] mPaddingT; - private int[] mPaddingR; - private int[] mPaddingB; - - private final Rect mTmpRect = new Rect(); - private boolean mMutated; - - /** - * Create a new layer drawable with the list of specified layers. - * - * @param layers A list of drawables to use as layers in this new drawable. - */ - public LayerDrawable(Drawable[] layers) { - this(layers, null); - } - - /** - * Create a new layer drawable with the specified list of layers and the specified - * constant state. - * - * @param layers The list of layers to add to this drawable. - * @param state The constant drawable state. - */ - LayerDrawable(Drawable[] layers, LayerState state) { - this(state); - int length = layers.length; - ChildDrawable[] r = new ChildDrawable[length]; - - for (int i = 0; i < length; i++) { - r[i] = new ChildDrawable(); - r[i].mDrawable = layers[i]; - layers[i].setCallback(this); - mLayerState.mChildrenChangingConfigurations |= layers[i].getChangingConfigurations(); - } - mLayerState.mNum = length; - mLayerState.mChildren = r; - - ensurePadding(); - } - - LayerDrawable() { - this((LayerState) null); - } - - LayerDrawable(LayerState state) { - LayerState as = createConstantState(state); - mLayerState = as; - if (as.mNum > 0) { - ensurePadding(); - } - } - - LayerState createConstantState(LayerState state) { - return new LayerState(state, this); - } - - @Override - public void inflate(Resources r, XmlPullParser parser, AttributeSet attrs) - throws XmlPullParserException, IOException { - super.inflate(r, parser, attrs); - - int type; - - final int innerDepth = parser.getDepth() + 1; - int depth; - while ((type = parser.next()) != XmlPullParser.END_DOCUMENT - && ((depth = parser.getDepth()) >= innerDepth || type != XmlPullParser.END_TAG)) { - if (type != XmlPullParser.START_TAG) { - continue; - } - - if (depth > innerDepth || !parser.getName().equals("item")) { - continue; - } - - TypedArray a = r.obtainAttributes(attrs, - com.android.internal.R.styleable.LayerDrawableItem); - - int left = a.getDimensionPixelOffset( - com.android.internal.R.styleable.LayerDrawableItem_left, 0); - int top = a.getDimensionPixelOffset( - com.android.internal.R.styleable.LayerDrawableItem_top, 0); - int right = a.getDimensionPixelOffset( - com.android.internal.R.styleable.LayerDrawableItem_right, 0); - int bottom = a.getDimensionPixelOffset( - com.android.internal.R.styleable.LayerDrawableItem_bottom, 0); - int drawableRes = a.getResourceId( - com.android.internal.R.styleable.LayerDrawableItem_drawable, 0); - int id = a.getResourceId(com.android.internal.R.styleable.LayerDrawableItem_id, - View.NO_ID); - - a.recycle(); - - Drawable dr; - if (drawableRes != 0) { - dr = r.getDrawable(drawableRes); - } else { - while ((type = parser.next()) == XmlPullParser.TEXT) { - } - if (type != XmlPullParser.START_TAG) { - throw new XmlPullParserException(parser.getPositionDescription() - + ": <item> tag requires a 'drawable' attribute or " - + "child tag defining a drawable"); - } - dr = Drawable.createFromXmlInner(r, parser, attrs); - } - - addLayer(dr, id, left, top, right, bottom); - } - - ensurePadding(); - onStateChange(getState()); - } - - /** - * Add a new layer to this drawable. The new layer is identified by an id. - * - * @param layer The drawable to add as a layer. - * @param id The id of the new layer. - * @param left The left padding of the new layer. - * @param top The top padding of the new layer. - * @param right The right padding of the new layer. - * @param bottom The bottom padding of the new layer. - */ - private void addLayer(Drawable layer, int id, int left, int top, int right, int bottom) { - final LayerState st = mLayerState; - int N = st.mChildren != null ? st.mChildren.length : 0; - int i = st.mNum; - if (i >= N) { - ChildDrawable[] nu = new ChildDrawable[N + 10]; - if (i > 0) { - System.arraycopy(st.mChildren, 0, nu, 0, i); - } - st.mChildren = nu; - } - - mLayerState.mChildrenChangingConfigurations |= layer.getChangingConfigurations(); - - ChildDrawable childDrawable = new ChildDrawable(); - st.mChildren[i] = childDrawable; - childDrawable.mId = id; - childDrawable.mDrawable = layer; - childDrawable.mInsetL = left; - childDrawable.mInsetT = top; - childDrawable.mInsetR = right; - childDrawable.mInsetB = bottom; - st.mNum++; - - layer.setCallback(this); - } - - /** - * Look for a layer with the given id, and returns its {@link Drawable}. - * - * @param id The layer ID to search for. - * @return The {@link Drawable} of the layer that has the given id in the hierarchy or null. - */ - public Drawable findDrawableByLayerId(int id) { - final ChildDrawable[] layers = mLayerState.mChildren; - - for (int i = mLayerState.mNum - 1; i >= 0; i--) { - if (layers[i].mId == id) { - return layers[i].mDrawable; - } - } - - return null; - } - - /** - * Sets the ID of a layer. - * - * @param index The index of the layer which will received the ID. - * @param id The ID to assign to the layer. - */ - public void setId(int index, int id) { - mLayerState.mChildren[index].mId = id; - } - - /** - * Returns the number of layers contained within this. - * @return The number of layers. - */ - public int getNumberOfLayers() { - return mLayerState.mNum; - } - - /** - * Returns the drawable at the specified layer index. - * - * @param index The layer index of the drawable to retrieve. - * - * @return The {@link android.graphics.drawable.Drawable} at the specified layer index. - */ - public Drawable getDrawable(int index) { - return mLayerState.mChildren[index].mDrawable; - } - - /** - * Returns the id of the specified layer. - * - * @param index The index of the layer. - * - * @return The id of the layer or {@link android.view.View#NO_ID} if the layer has no id. - */ - public int getId(int index) { - return mLayerState.mChildren[index].mId; - } - - /** - * Sets (or replaces) the {@link Drawable} for the layer with the given id. - * - * @param id The layer ID to search for. - * @param drawable The replacement {@link Drawable}. - * @return Whether the {@link Drawable} was replaced (could return false if - * the id was not found). - */ - public boolean setDrawableByLayerId(int id, Drawable drawable) { - final ChildDrawable[] layers = mLayerState.mChildren; - - for (int i = mLayerState.mNum - 1; i >= 0; i--) { - if (layers[i].mId == id) { - layers[i].mDrawable = drawable; - return true; - } - } - - return false; - } - - /** Specify modifiers to the bounds for the drawable[index]. - left += l - top += t; - right -= r; - bottom -= b; - */ - public void setLayerInset(int index, int l, int t, int r, int b) { - ChildDrawable childDrawable = mLayerState.mChildren[index]; - childDrawable.mInsetL = l; - childDrawable.mInsetT = t; - childDrawable.mInsetR = r; - childDrawable.mInsetB = b; - } - - // overrides from Drawable.Callback - - public void invalidateDrawable(Drawable who) { - if (mCallback != null) { - mCallback.invalidateDrawable(this); - } - } - - public void scheduleDrawable(Drawable who, Runnable what, long when) { - if (mCallback != null) { - mCallback.scheduleDrawable(this, what, when); - } - } - - public void unscheduleDrawable(Drawable who, Runnable what) { - if (mCallback != null) { - mCallback.unscheduleDrawable(this, what); - } - } - - // overrides from Drawable - - @Override - public void draw(Canvas canvas) { - final ChildDrawable[] array = mLayerState.mChildren; - final int N = mLayerState.mNum; - for (int i=0; i<N; i++) { - array[i].mDrawable.draw(canvas); - } - } - - @Override - public int getChangingConfigurations() { - return super.getChangingConfigurations() - | mLayerState.mChangingConfigurations - | mLayerState.mChildrenChangingConfigurations; - } - - @Override - public boolean getPadding(Rect padding) { - // Arbitrarily get the padding from the first image. - // Technically we should maybe do something more intelligent, - // like take the max padding of all the images. - padding.left = 0; - padding.top = 0; - padding.right = 0; - padding.bottom = 0; - final ChildDrawable[] array = mLayerState.mChildren; - final int N = mLayerState.mNum; - for (int i=0; i<N; i++) { - reapplyPadding(i, array[i]); - padding.left += mPaddingL[i]; - padding.top += mPaddingT[i]; - padding.right += mPaddingR[i]; - padding.bottom += mPaddingB[i]; - } - return true; - } - - @Override - public boolean setVisible(boolean visible, boolean restart) { - boolean changed = super.setVisible(visible, restart); - final ChildDrawable[] array = mLayerState.mChildren; - final int N = mLayerState.mNum; - for (int i=0; i<N; i++) { - array[i].mDrawable.setVisible(visible, restart); - } - return changed; - } - - @Override - public void setDither(boolean dither) { - final ChildDrawable[] array = mLayerState.mChildren; - final int N = mLayerState.mNum; - for (int i=0; i<N; i++) { - array[i].mDrawable.setDither(dither); - } - } - - @Override - public void setAlpha(int alpha) { - final ChildDrawable[] array = mLayerState.mChildren; - final int N = mLayerState.mNum; - for (int i=0; i<N; i++) { - array[i].mDrawable.setAlpha(alpha); - } - } - - @Override - public void setColorFilter(ColorFilter cf) { - final ChildDrawable[] array = mLayerState.mChildren; - final int N = mLayerState.mNum; - for (int i=0; i<N; i++) { - array[i].mDrawable.setColorFilter(cf); - } - } - - @Override - public int getOpacity() { - return mLayerState.getOpacity(); - } - - @Override - public boolean isStateful() { - return mLayerState.isStateful(); - } - - @Override - protected boolean onStateChange(int[] state) { - final ChildDrawable[] array = mLayerState.mChildren; - final int N = mLayerState.mNum; - boolean paddingChanged = false; - boolean changed = false; - for (int i=0; i<N; i++) { - final ChildDrawable r = array[i]; - if (r.mDrawable.setState(state)) { - changed = true; - } - if (reapplyPadding(i, r)) { - paddingChanged = true; - } - } - if (paddingChanged) { - onBoundsChange(getBounds()); - } - return changed; - } - - @Override - protected boolean onLevelChange(int level) { - final ChildDrawable[] array = mLayerState.mChildren; - final int N = mLayerState.mNum; - boolean paddingChanged = false; - boolean changed = false; - for (int i=0; i<N; i++) { - final ChildDrawable r = array[i]; - if (r.mDrawable.setLevel(level)) { - changed = true; - } - if (reapplyPadding(i, r)) { - paddingChanged = true; - } - } - if (paddingChanged) { - onBoundsChange(getBounds()); - } - return changed; - } - - @Override - protected void onBoundsChange(Rect bounds) { - final ChildDrawable[] array = mLayerState.mChildren; - final int N = mLayerState.mNum; - int padL=0, padT=0, padR=0, padB=0; - for (int i=0; i<N; i++) { - final ChildDrawable r = array[i]; - r.mDrawable.setBounds(bounds.left + r.mInsetL + padL, - bounds.top + r.mInsetT + padT, - bounds.right - r.mInsetR - padR, - bounds.bottom - r.mInsetB - padB); - padL += mPaddingL[i]; - padR += mPaddingR[i]; - padT += mPaddingT[i]; - padB += mPaddingB[i]; - } - } - - @Override - public int getIntrinsicWidth() { - int width = -1; - final ChildDrawable[] array = mLayerState.mChildren; - final int N = mLayerState.mNum; - int padL=0, padR=0; - for (int i=0; i<N; i++) { - final ChildDrawable r = array[i]; - int w = r.mDrawable.getIntrinsicWidth() - + r.mInsetL + r.mInsetR + padL + padR; - if (w > width) { - width = w; - } - padL += mPaddingL[i]; - padR += mPaddingR[i]; - } - return width; - } - - @Override - public int getIntrinsicHeight() { - int height = -1; - final ChildDrawable[] array = mLayerState.mChildren; - final int N = mLayerState.mNum; - int padT=0, padB=0; - for (int i=0; i<N; i++) { - final ChildDrawable r = array[i]; - int h = r.mDrawable.getIntrinsicHeight() + r.mInsetT + r.mInsetB + + padT + padB; - if (h > height) { - height = h; - } - padT += mPaddingT[i]; - padB += mPaddingB[i]; - } - return height; - } - - private boolean reapplyPadding(int i, ChildDrawable r) { - final Rect rect = mTmpRect; - r.mDrawable.getPadding(rect); - if (rect.left != mPaddingL[i] || rect.top != mPaddingT[i] || - rect.right != mPaddingR[i] || rect.bottom != mPaddingB[i]) { - mPaddingL[i] = rect.left; - mPaddingT[i] = rect.top; - mPaddingR[i] = rect.right; - mPaddingB[i] = rect.bottom; - return true; - } - return false; - } - - private void ensurePadding() { - final int N = mLayerState.mNum; - if (mPaddingL != null && mPaddingL.length >= N) { - return; - } - mPaddingL = new int[N]; - mPaddingT = new int[N]; - mPaddingR = new int[N]; - mPaddingB = new int[N]; - } - - @Override - public ConstantState getConstantState() { - if (mLayerState.canConstantState()) { - mLayerState.mChangingConfigurations = super.getChangingConfigurations(); - return mLayerState; - } - return null; - } - - @Override - public Drawable mutate() { - if (!mMutated && super.mutate() == this) { - final ChildDrawable[] array = mLayerState.mChildren; - final int N = mLayerState.mNum; - for (int i = 0; i < N; i++) { - array[i].mDrawable.mutate(); - } - mMutated = true; - } - return this; - } - - static class ChildDrawable { - public Drawable mDrawable; - public int mInsetL, mInsetT, mInsetR, mInsetB; - public int mId; - } - - static class LayerState extends ConstantState { - int mNum; - ChildDrawable[] mChildren; - - int mChangingConfigurations; - int mChildrenChangingConfigurations; - - private boolean mHaveOpacity = false; - private int mOpacity; - - private boolean mHaveStateful = false; - private boolean mStateful; - - private boolean mCheckedConstantState; - private boolean mCanConstantState; - - LayerState(LayerState orig, LayerDrawable owner) { - if (orig != null) { - final ChildDrawable[] origChildDrawable = orig.mChildren; - final int N = orig.mNum; - - mNum = N; - mChildren = new ChildDrawable[N]; - - mChangingConfigurations = orig.mChangingConfigurations; - mChildrenChangingConfigurations = orig.mChildrenChangingConfigurations; - - for (int i = 0; i < N; i++) { - final ChildDrawable r = mChildren[i] = new ChildDrawable(); - final ChildDrawable or = origChildDrawable[i]; - r.mDrawable = or.mDrawable.getConstantState().newDrawable(); - r.mDrawable.setCallback(owner); - r.mInsetL = or.mInsetL; - r.mInsetT = or.mInsetT; - r.mInsetR = or.mInsetR; - r.mInsetB = or.mInsetB; - r.mId = or.mId; - } - - mHaveOpacity = orig.mHaveOpacity; - mOpacity = orig.mOpacity; - mHaveStateful = orig.mHaveStateful; - mStateful = orig.mStateful; - mCheckedConstantState = mCanConstantState = true; - } else { - mNum = 0; - mChildren = null; - } - } - - @Override - public Drawable newDrawable() { - return new LayerDrawable(this); - } - - @Override - public int getChangingConfigurations() { - return mChangingConfigurations; - } - - public final int getOpacity() { - if (mHaveOpacity) { - return mOpacity; - } - - final int N = mNum; - int op = N > 0 ? mChildren[0].mDrawable.getOpacity() : PixelFormat.TRANSPARENT; - for (int i = 1; i < N; i++) { - op = Drawable.resolveOpacity(op, mChildren[i].mDrawable.getOpacity()); - } - mOpacity = op; - mHaveOpacity = true; - return op; - } - - public final boolean isStateful() { - if (mHaveStateful) { - return mStateful; - } - - boolean stateful = false; - final int N = mNum; - for (int i = 0; i < N; i++) { - if (mChildren[i].mDrawable.isStateful()) { - stateful = true; - break; - } - } - - mStateful = stateful; - mHaveStateful = true; - return stateful; - } - - public synchronized boolean canConstantState() { - if (!mCheckedConstantState && mChildren != null) { - mCanConstantState = true; - final int N = mNum; - for (int i=0; i<N; i++) { - if (mChildren[i].mDrawable.getConstantState() == null) { - mCanConstantState = false; - break; - } - } - mCheckedConstantState = true; - } - - return mCanConstantState; - } - } -} - |