SVGDrawable.java

/*
 *
 *  * Copyright 2015. Appsi Mobile
 *  *
 *  * 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 com.larvalabs.svgandroid;

import android.graphics.Canvas;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.PictureDrawable;
import android.util.Log;

/**
 * Based on work by nimingtao:
 * https://code.google.com/p/adet/source/browse/trunk/adet/src/cn/mobileww/adet/graphics
 * /SvgDrawable.java
 *
 * @author nimingtao, mstevens83
 * @since 19Aug 2013
 */

public class SVGDrawable extends PictureDrawable {

    private final String TAG = "SVGDrawable";

    private final SVGState mSvgState;

    /**
     * @param picture
     */
    public SVGDrawable(SVG svg) {
        super(svg.getPicture());
        this.mSvgState = new SVGState(svg);
    }

    /**
     * Original author nimingtao wrote that this method may not work on devices with Ice Cream
     * Sandwich (Android v4.0).<br/>
     * See: http://stackoverflow.com/q/10384613/1084488<br/>
     * Apparently this is because canvas.drawPicture is not supported with hardware acceleration.
     * If the problem occurs
     * and solved by programmatically turning off hardware acceleration only on the view that will
     * draw the Picture:
     * view.setLayerType(View.LAYER_TYPE_SOFTWARE, null);<br/>
     * <br/>
     * However, I (mstevens83) was unable to reproduce this problem on an emulator running Ice
     * Cream Sandwich, nor on
     * physical devices running Jelly Bean (v4.1.2 and v4.3 tested).
     */
    @Override
    public void draw(Canvas canvas) {
        if (getPicture() != null) {
            Rect bounds = getBounds();
            canvas.save();
            // draw picture to fit bounds!
            canvas.drawPicture(getPicture(), bounds);
            canvas.restore();
        }
    }

    @Override
    public int getChangingConfigurations() {
        int c = super.getChangingConfigurations() | mSvgState.mChangingConfigurations;
        Log.e(TAG, "CC = " + c);
        return c;
    }

    // @Override
    // public int getIntrinsicWidth() {
    // Rect bounds = getBounds();
    // RectF limits = mSvgState.mSvg.getLimits();
    // if (bounds != null) {
    // return (int) bounds.width();
    // } else if (limits != null) {
    // return (int) limits.width();
    // } else {
    // return -1;
    // }
    // }
    //
    // @Override
    // public int getIntrinsicHeight() {
    // Rect bounds = getBounds();
    // RectF limits = mSvgState.mSvg.getLimits();
    // if (bounds != null) {
    // return (int) bounds.height();
    // } else if (limits != null) {
    // return (int) limits.height();
    // } else {
    // return -1;
    // }
    // }

    @Override
    protected void onBoundsChange(Rect bounds) {
        super.onBoundsChange(bounds);
    }

    @Override
    public ConstantState getConstantState() {
        mSvgState.mChangingConfigurations = super.getChangingConfigurations();
        return this.mSvgState;
    }

    final static class SVGState extends ConstantState {

        int mChangingConfigurations;

        private final SVG mSvg;

        SVGState(SVG svg) {
            this.mSvg = svg;
        }

        /*
         * (non-Javadoc)
         * @see android.graphics.drawable.Drawable.ConstantState#newDrawable()
         */
        @Override
        public Drawable newDrawable() {
            return new SVGDrawable(mSvg);
        }

        /*
         * (non-Javadoc)
         * @see android.graphics.drawable.Drawable.ConstantState#getChangingConfigurations()
         */
        @Override
        public int getChangingConfigurations() {
            return mChangingConfigurations;
        }

    }

}