ForegroundRelativeLayout

package com.vk.dialogsample.widget;

import android.annotation.TargetApi;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.widget.RelativeLayout;

import com.vk.dialogsample.R;

public class ForegroundRelativeLayout extends RelativeLayout {
    private Drawable mForegroundSelector;
    private boolean mUseBackgroundPadding = false;

    public ForegroundRelativeLayout(Context paramContext) {
        this(paramContext, null);
    }

    public ForegroundRelativeLayout(Context paramContext, AttributeSet paramAttributeSet) {
        this(paramContext, paramAttributeSet, 0);
    }

    public ForegroundRelativeLayout(Context paramContext, AttributeSet paramAttributeSet, int paramInt) {
        super(paramContext, paramAttributeSet, paramInt);
        init(paramContext, paramAttributeSet, paramInt);
    }

    @TargetApi(21)
    public ForegroundRelativeLayout(Context paramContext, AttributeSet paramAttributeSet, int paramInt1, int paramInt2) {
        super(paramContext, paramAttributeSet, paramInt1, paramInt2);
        init(paramContext, paramAttributeSet, paramInt2);
    }

    private void init(Context context, AttributeSet set, int i) {
        if(set != null) {
            TypedArray a = context.obtainStyledAttributes(set, R.styleable.FrameLayout, i, 0);
            if(a != null) {
                Drawable d = a.getDrawable(0);
                mUseBackgroundPadding = a.getBoolean(R.styleable.FrameLayout_foregroundInsidePadding, false);
                if(d != null) {
                    setForeground(d);
                }
                a.recycle();
            }
        }
    }

    protected void dispatchDraw(Canvas paramCanvas) {
        super.dispatchDraw(paramCanvas);
        if (this.mForegroundSelector != null) {
            this.mForegroundSelector.draw(paramCanvas);
        }
    }

    @TargetApi(21)
    public void drawableHotspotChanged(float paramFloat1, float paramFloat2) {
        super.drawableHotspotChanged(paramFloat1, paramFloat2);
        if (this.mForegroundSelector != null) {
            this.mForegroundSelector.setHotspot(paramFloat1, paramFloat2);
        }
    }

    protected void drawableStateChanged() {
        super.drawableStateChanged();
        if ((this.mForegroundSelector != null) && (this.mForegroundSelector.isStateful())) {
            this.mForegroundSelector.setState(getDrawableState());
        }
    }

    public void jumpDrawablesToCurrentState() {
        super.jumpDrawablesToCurrentState();
        if (this.mForegroundSelector != null) {
            this.mForegroundSelector.jumpToCurrentState();
        }
    }

    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        super.onSizeChanged(w, h, oldw, oldh);
        if(mForegroundSelector != null) {
            if(mUseBackgroundPadding) {
                mForegroundSelector.setBounds(getPaddingLeft(), getPaddingTop(), (w - getPaddingRight()), (h - getPaddingBottom()));
                return;
            }
            mForegroundSelector.setBounds(0, 0, w, h);
        }
    }

    public void setForeground(Drawable paramDrawable) {
        if (mForegroundSelector != paramDrawable) {
            if (mForegroundSelector != null) {
                mForegroundSelector.setCallback(null);
                unscheduleDrawable(mForegroundSelector);
            }
            mForegroundSelector = paramDrawable;
            if (paramDrawable != null) {
                setWillNotDraw(false);
                paramDrawable.setCallback(this);
                if (paramDrawable.isStateful()) {
                    paramDrawable.setState(getDrawableState());
                }
            } else {
                setWillNotDraw(true);
            }
            requestLayout();
            invalidate();
        }
    }

    protected boolean verifyDrawable(Drawable paramDrawable) {
        return (super.verifyDrawable(paramDrawable)) || (paramDrawable == this.mForegroundSelector);
    }
}