a1b92c5e8b
Make ProgressBar maintain aspect ratio on indeterminate progress drawables. Make RotateDrawable tolerate left/top bounds != 0. Change-Id: Iee03030caa98f72a8745f1ae3fb0de108ff663d4
354 lines
11 KiB
Java
354 lines
11 KiB
Java
/*
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* Copyright (C) 2007 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.graphics.drawable;
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import org.xmlpull.v1.XmlPullParser;
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import org.xmlpull.v1.XmlPullParserException;
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import android.graphics.Canvas;
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import android.graphics.ColorFilter;
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import android.graphics.Rect;
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import android.content.res.Resources;
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import android.content.res.TypedArray;
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import android.util.TypedValue;
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import android.util.AttributeSet;
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import android.util.Log;
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import java.io.IOException;
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/**
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* <p>A Drawable that can rotate another Drawable based on the current level
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* value. The start and end angles of rotation can be controlled to map any
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* circular arc to the level values range.</p>
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*
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* <p>It can be defined in an XML file with the <code><rotate></code> element. For more
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* information, see the guide to <a
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* href="{@docRoot}guide/topics/resources/animation-resource.html">Animation Resources</a>.</p>
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*
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* @attr ref android.R.styleable#RotateDrawable_visible
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* @attr ref android.R.styleable#RotateDrawable_fromDegrees
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* @attr ref android.R.styleable#RotateDrawable_toDegrees
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* @attr ref android.R.styleable#RotateDrawable_pivotX
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* @attr ref android.R.styleable#RotateDrawable_pivotY
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* @attr ref android.R.styleable#RotateDrawable_drawable
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*/
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public class RotateDrawable extends Drawable implements Drawable.Callback {
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private static final float MAX_LEVEL = 10000.0f;
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private RotateState mState;
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private boolean mMutated;
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/**
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* <p>Create a new rotating drawable with an empty state.</p>
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*/
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public RotateDrawable() {
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this(null, null);
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}
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/**
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* <p>Create a new rotating drawable with the specified state. A copy of
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* this state is used as the internal state for the newly created
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* drawable.</p>
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*
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* @param rotateState the state for this drawable
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*/
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private RotateDrawable(RotateState rotateState, Resources res) {
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mState = new RotateState(rotateState, this, res);
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}
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public void draw(Canvas canvas) {
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int saveCount = canvas.save();
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Rect bounds = mState.mDrawable.getBounds();
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int w = bounds.right - bounds.left;
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int h = bounds.bottom - bounds.top;
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final RotateState st = mState;
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float px = st.mPivotXRel ? (w * st.mPivotX) : st.mPivotX;
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float py = st.mPivotYRel ? (h * st.mPivotY) : st.mPivotY;
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canvas.rotate(st.mCurrentDegrees, px + bounds.left, py + bounds.top);
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st.mDrawable.draw(canvas);
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canvas.restoreToCount(saveCount);
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}
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/**
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* Returns the drawable rotated by this RotateDrawable.
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*/
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public Drawable getDrawable() {
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return mState.mDrawable;
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}
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@Override
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public int getChangingConfigurations() {
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return super.getChangingConfigurations()
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| mState.mChangingConfigurations
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| mState.mDrawable.getChangingConfigurations();
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}
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public void setAlpha(int alpha) {
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mState.mDrawable.setAlpha(alpha);
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}
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public void setColorFilter(ColorFilter cf) {
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mState.mDrawable.setColorFilter(cf);
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}
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public int getOpacity() {
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return mState.mDrawable.getOpacity();
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}
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public void invalidateDrawable(Drawable who) {
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final Callback callback = getCallback();
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if (callback != null) {
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callback.invalidateDrawable(this);
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}
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}
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public void scheduleDrawable(Drawable who, Runnable what, long when) {
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final Callback callback = getCallback();
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if (callback != null) {
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callback.scheduleDrawable(this, what, when);
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}
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}
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public void unscheduleDrawable(Drawable who, Runnable what) {
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final Callback callback = getCallback();
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if (callback != null) {
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callback.unscheduleDrawable(this, what);
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}
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}
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@Override
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public boolean getPadding(Rect padding) {
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return mState.mDrawable.getPadding(padding);
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}
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@Override
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public boolean setVisible(boolean visible, boolean restart) {
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mState.mDrawable.setVisible(visible, restart);
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return super.setVisible(visible, restart);
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}
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@Override
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public boolean isStateful() {
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return mState.mDrawable.isStateful();
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}
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@Override
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protected boolean onStateChange(int[] state) {
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boolean changed = mState.mDrawable.setState(state);
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onBoundsChange(getBounds());
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return changed;
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}
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@Override
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protected boolean onLevelChange(int level) {
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mState.mDrawable.setLevel(level);
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onBoundsChange(getBounds());
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mState.mCurrentDegrees = mState.mFromDegrees +
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(mState.mToDegrees - mState.mFromDegrees) *
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((float) level / MAX_LEVEL);
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invalidateSelf();
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return true;
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}
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@Override
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protected void onBoundsChange(Rect bounds) {
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mState.mDrawable.setBounds(bounds.left, bounds.top,
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bounds.right, bounds.bottom);
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}
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@Override
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public int getIntrinsicWidth() {
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return mState.mDrawable.getIntrinsicWidth();
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}
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@Override
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public int getIntrinsicHeight() {
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return mState.mDrawable.getIntrinsicHeight();
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}
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@Override
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public ConstantState getConstantState() {
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if (mState.canConstantState()) {
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mState.mChangingConfigurations = getChangingConfigurations();
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return mState;
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}
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return null;
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}
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@Override
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public void inflate(Resources r, XmlPullParser parser, AttributeSet attrs)
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throws XmlPullParserException, IOException {
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TypedArray a = r.obtainAttributes(attrs,
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com.android.internal.R.styleable.RotateDrawable);
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super.inflateWithAttributes(r, parser, a,
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com.android.internal.R.styleable.RotateDrawable_visible);
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TypedValue tv = a.peekValue(com.android.internal.R.styleable.RotateDrawable_pivotX);
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boolean pivotXRel;
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float pivotX;
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if (tv == null) {
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pivotXRel = true;
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pivotX = 0.5f;
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} else {
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pivotXRel = tv.type == TypedValue.TYPE_FRACTION;
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pivotX = pivotXRel ? tv.getFraction(1.0f, 1.0f) : tv.getFloat();
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}
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tv = a.peekValue(com.android.internal.R.styleable.RotateDrawable_pivotY);
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boolean pivotYRel;
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float pivotY;
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if (tv == null) {
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pivotYRel = true;
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pivotY = 0.5f;
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} else {
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pivotYRel = tv.type == TypedValue.TYPE_FRACTION;
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pivotY = pivotYRel ? tv.getFraction(1.0f, 1.0f) : tv.getFloat();
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}
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float fromDegrees = a.getFloat(
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com.android.internal.R.styleable.RotateDrawable_fromDegrees, 0.0f);
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float toDegrees = a.getFloat(
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com.android.internal.R.styleable.RotateDrawable_toDegrees, 360.0f);
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int res = a.getResourceId(
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com.android.internal.R.styleable.RotateDrawable_drawable, 0);
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Drawable drawable = null;
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if (res > 0) {
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drawable = r.getDrawable(res);
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}
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a.recycle();
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int outerDepth = parser.getDepth();
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int type;
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while ((type = parser.next()) != XmlPullParser.END_DOCUMENT &&
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(type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) {
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if (type != XmlPullParser.START_TAG) {
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continue;
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}
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if ((drawable = Drawable.createFromXmlInner(r, parser, attrs)) == null) {
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Log.w("drawable", "Bad element under <rotate>: "
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+ parser .getName());
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}
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}
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if (drawable == null) {
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Log.w("drawable", "No drawable specified for <rotate>");
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}
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mState.mDrawable = drawable;
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mState.mPivotXRel = pivotXRel;
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mState.mPivotX = pivotX;
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mState.mPivotYRel = pivotYRel;
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mState.mPivotY = pivotY;
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mState.mFromDegrees = mState.mCurrentDegrees = fromDegrees;
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mState.mToDegrees = toDegrees;
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if (drawable != null) {
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drawable.setCallback(this);
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}
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}
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@Override
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public Drawable mutate() {
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if (!mMutated && super.mutate() == this) {
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mState.mDrawable.mutate();
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mMutated = true;
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}
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return this;
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}
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/**
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* <p>Represents the state of a rotation for a given drawable. The same
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* rotate drawable can be invoked with different states to drive several
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* rotations at the same time.</p>
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*/
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final static class RotateState extends Drawable.ConstantState {
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Drawable mDrawable;
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int mChangingConfigurations;
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boolean mPivotXRel;
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float mPivotX;
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boolean mPivotYRel;
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float mPivotY;
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float mFromDegrees;
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float mToDegrees;
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float mCurrentDegrees;
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private boolean mCanConstantState;
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private boolean mCheckedConstantState;
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public RotateState(RotateState source, RotateDrawable owner, Resources res) {
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if (source != null) {
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if (res != null) {
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mDrawable = source.mDrawable.getConstantState().newDrawable(res);
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} else {
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mDrawable = source.mDrawable.getConstantState().newDrawable();
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}
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mDrawable.setCallback(owner);
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mPivotXRel = source.mPivotXRel;
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mPivotX = source.mPivotX;
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mPivotYRel = source.mPivotYRel;
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mPivotY = source.mPivotY;
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mFromDegrees = mCurrentDegrees = source.mFromDegrees;
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mToDegrees = source.mToDegrees;
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mCanConstantState = mCheckedConstantState = true;
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}
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}
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@Override
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public Drawable newDrawable() {
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return new RotateDrawable(this, null);
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}
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@Override
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public Drawable newDrawable(Resources res) {
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return new RotateDrawable(this, res);
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}
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@Override
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public int getChangingConfigurations() {
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return mChangingConfigurations;
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}
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public boolean canConstantState() {
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if (!mCheckedConstantState) {
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mCanConstantState = mDrawable.getConstantState() != null;
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mCheckedConstantState = true;
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}
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return mCanConstantState;
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}
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}
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}
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