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package com.android.launcher3.graphics;
import android.annotation.TargetApi;
import android.content.res.Resources;
import android.content.res.Resources.Theme;
import android.graphics.Canvas;
import android.graphics.drawable.ColorDrawable;
import android.graphics.drawable.DrawableWrapper;
import android.os.Build;
import android.util.AttributeSet;
import org.xmlpull.v1.XmlPullParser;
/**
* Extension of {@link DrawableWrapper} which scales the child drawables by a fixed amount.
*/
@TargetApi(Build.VERSION_CODES.N)
public class FixedScaleDrawable extends DrawableWrapper {
// TODO b/33553066 use the constant defined in MaskableIconDrawable
private static final float LEGACY_ICON_SCALE = .7f * .6667f;
private float mScaleX, mScaleY;
public FixedScaleDrawable() {
super(new ColorDrawable());
mScaleX = LEGACY_ICON_SCALE;
mScaleY = LEGACY_ICON_SCALE;
}
@Override
public void draw(Canvas canvas) {
int saveCount = canvas.save();
canvas.scale(mScaleX, mScaleY,
getBounds().exactCenterX(), getBounds().exactCenterY());
super.draw(canvas);
canvas.restoreToCount(saveCount);
}
@Override
public void inflate(Resources r, XmlPullParser parser, AttributeSet attrs) { }
@Override
public void inflate(Resources r, XmlPullParser parser, AttributeSet attrs, Theme theme) { }
public void setScale(float scale) {
float h = getIntrinsicHeight();
float w = getIntrinsicWidth();
mScaleX = scale * LEGACY_ICON_SCALE;
mScaleY = scale * LEGACY_ICON_SCALE;
if (h > w && w > 0) {
mScaleX *= w / h;
} else if (w > h && h > 0) {
mScaleY *= h / w;
}
}
}