| /* |
| * Copyright (C) 2008 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.util.Log; |
| |
| import java.io.IOException; |
| |
| /** |
| * A Drawable that insets another Drawable by a specified distance. |
| * This is used when a View needs a background that is smaller than |
| * the View's actual bounds. |
| * |
| * <p>It can be defined in an XML file with the <code><inset></code> element.</p> |
| * |
| * @attr ref android.R.styleable#InsetDrawable_visible |
| * @attr ref android.R.styleable#InsetDrawable_drawable |
| * @attr ref android.R.styleable#InsetDrawable_insetLeft |
| * @attr ref android.R.styleable#InsetDrawable_insetRight |
| * @attr ref android.R.styleable#InsetDrawable_insetTop |
| * @attr ref android.R.styleable#InsetDrawable_insetBottom |
| */ |
| public class InsetDrawable extends Drawable implements Drawable.Callback |
| { |
| // Most of this is copied from ScaleDrawable. |
| private InsetState mInsetState; |
| private final Rect mTmpRect = new Rect(); |
| private boolean mMutated; |
| |
| /*package*/ InsetDrawable() { |
| this(null, null); |
| } |
| |
| public InsetDrawable(Drawable drawable, int inset) { |
| this(drawable, inset, inset, inset, inset); |
| } |
| |
| public InsetDrawable(Drawable drawable, int insetLeft, int insetTop, |
| int insetRight, int insetBottom) { |
| this(null, null); |
| |
| mInsetState.mDrawable = drawable; |
| mInsetState.mInsetLeft = insetLeft; |
| mInsetState.mInsetTop = insetTop; |
| mInsetState.mInsetRight = insetRight; |
| mInsetState.mInsetBottom = insetBottom; |
| |
| if (drawable != null) { |
| drawable.setCallback(this); |
| } |
| } |
| |
| @Override public void inflate(Resources r, XmlPullParser parser, |
| AttributeSet attrs) |
| throws XmlPullParserException, IOException { |
| int type; |
| |
| TypedArray a = r.obtainAttributes(attrs, |
| com.android.internal.R.styleable.InsetDrawable); |
| |
| super.inflateWithAttributes(r, parser, a, |
| com.android.internal.R.styleable.InsetDrawable_visible); |
| |
| int drawableRes = a.getResourceId(com.android.internal.R.styleable. |
| InsetDrawable_drawable, 0); |
| |
| int inLeft = a.getDimensionPixelOffset(com.android.internal.R.styleable. |
| InsetDrawable_insetLeft, 0); |
| int inTop = a.getDimensionPixelOffset(com.android.internal.R.styleable. |
| InsetDrawable_insetTop, 0); |
| int inRight = a.getDimensionPixelOffset(com.android.internal.R.styleable. |
| InsetDrawable_insetRight, 0); |
| int inBottom = a.getDimensionPixelOffset(com.android.internal.R.styleable. |
| InsetDrawable_insetBottom, 0); |
| |
| 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() |
| + ": <inset> tag requires a 'drawable' attribute or " |
| + "child tag defining a drawable"); |
| } |
| dr = Drawable.createFromXmlInner(r, parser, attrs); |
| } |
| |
| if (dr == null) { |
| Log.w("drawable", "No drawable specified for <inset>"); |
| } |
| |
| mInsetState.mDrawable = dr; |
| mInsetState.mInsetLeft = inLeft; |
| mInsetState.mInsetRight = inRight; |
| mInsetState.mInsetTop = inTop; |
| mInsetState.mInsetBottom = inBottom; |
| |
| if (dr != null) { |
| dr.setCallback(this); |
| } |
| } |
| |
| // 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) { |
| mInsetState.mDrawable.draw(canvas); |
| } |
| |
| @Override |
| public int getChangingConfigurations() { |
| return super.getChangingConfigurations() |
| | mInsetState.mChangingConfigurations |
| | mInsetState.mDrawable.getChangingConfigurations(); |
| } |
| |
| @Override |
| public boolean getPadding(Rect padding) { |
| boolean pad = mInsetState.mDrawable.getPadding(padding); |
| |
| padding.left += mInsetState.mInsetLeft; |
| padding.right += mInsetState.mInsetRight; |
| padding.top += mInsetState.mInsetTop; |
| padding.bottom += mInsetState.mInsetBottom; |
| |
| if (pad || (mInsetState.mInsetLeft | mInsetState.mInsetRight | |
| mInsetState.mInsetTop | mInsetState.mInsetBottom) != 0) { |
| return true; |
| } else { |
| return false; |
| } |
| } |
| |
| @Override |
| public boolean setVisible(boolean visible, boolean restart) { |
| mInsetState.mDrawable.setVisible(visible, restart); |
| return super.setVisible(visible, restart); |
| } |
| |
| @Override |
| public void setAlpha(int alpha) { |
| mInsetState.mDrawable.setAlpha(alpha); |
| } |
| |
| @Override |
| public void setColorFilter(ColorFilter cf) { |
| mInsetState.mDrawable.setColorFilter(cf); |
| } |
| |
| @Override |
| public int getOpacity() { |
| return mInsetState.mDrawable.getOpacity(); |
| } |
| |
| @Override |
| public boolean isStateful() { |
| return mInsetState.mDrawable.isStateful(); |
| } |
| |
| @Override |
| protected boolean onStateChange(int[] state) { |
| boolean changed = mInsetState.mDrawable.setState(state); |
| onBoundsChange(getBounds()); |
| return changed; |
| } |
| |
| @Override |
| protected void onBoundsChange(Rect bounds) { |
| final Rect r = mTmpRect; |
| r.set(bounds); |
| |
| r.left += mInsetState.mInsetLeft; |
| r.top += mInsetState.mInsetTop; |
| r.right -= mInsetState.mInsetRight; |
| r.bottom -= mInsetState.mInsetBottom; |
| |
| mInsetState.mDrawable.setBounds(r.left, r.top, r.right, r.bottom); |
| } |
| |
| @Override |
| public int getIntrinsicWidth() { |
| return mInsetState.mDrawable.getIntrinsicWidth(); |
| } |
| |
| @Override |
| public int getIntrinsicHeight() { |
| return mInsetState.mDrawable.getIntrinsicHeight(); |
| } |
| |
| @Override |
| public ConstantState getConstantState() { |
| if (mInsetState.canConstantState()) { |
| mInsetState.mChangingConfigurations = super.getChangingConfigurations(); |
| return mInsetState; |
| } |
| return null; |
| } |
| |
| @Override |
| public Drawable mutate() { |
| if (!mMutated && super.mutate() == this) { |
| mInsetState.mDrawable.mutate(); |
| mMutated = true; |
| } |
| return this; |
| } |
| |
| final static class InsetState extends ConstantState { |
| Drawable mDrawable; |
| int mChangingConfigurations; |
| |
| int mInsetLeft; |
| int mInsetTop; |
| int mInsetRight; |
| int mInsetBottom; |
| |
| boolean mCheckedConstantState; |
| boolean mCanConstantState; |
| |
| InsetState(InsetState orig, InsetDrawable owner, Resources res) { |
| if (orig != null) { |
| if (res != null) { |
| mDrawable = orig.mDrawable.getConstantState().newDrawable(res); |
| } else { |
| mDrawable = orig.mDrawable.getConstantState().newDrawable(); |
| } |
| mDrawable.setCallback(owner); |
| mInsetLeft = orig.mInsetLeft; |
| mInsetTop = orig.mInsetTop; |
| mInsetRight = orig.mInsetRight; |
| mInsetBottom = orig.mInsetBottom; |
| mCheckedConstantState = mCanConstantState = true; |
| } |
| } |
| |
| @Override |
| public Drawable newDrawable() { |
| return new InsetDrawable(this, null); |
| } |
| |
| @Override |
| public Drawable newDrawable(Resources res) { |
| return new InsetDrawable(this, res); |
| } |
| |
| @Override |
| public int getChangingConfigurations() { |
| return mChangingConfigurations; |
| } |
| |
| boolean canConstantState() { |
| if (!mCheckedConstantState) { |
| mCanConstantState = mDrawable.getConstantState() != null; |
| mCheckedConstantState = true; |
| } |
| |
| return mCanConstantState; |
| } |
| } |
| |
| private InsetDrawable(InsetState state, Resources res) { |
| mInsetState = new InsetState(state, this, res); |
| } |
| } |
| |