Android Open Source - RevealLayout Reveal Layout

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Back to project page RevealLayout.

License

The source code is released under:

Apache License

Java Source Code

package me.yugy.github.reveallayout;
/* w ww. j  a  v a  2 s.  c  o  m*/
import android.annotation.TargetApi;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Path;
import android.os.Build;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;
import android.widget.FrameLayout;

import com.nineoldandroids.animation.Animator;
import com.nineoldandroids.animation.AnimatorListenerAdapter;
import com.nineoldandroids.animation.ObjectAnimator;

/**
 * Created by yugy on 14/11/21.
 */
public class RevealLayout extends FrameLayout{

    private Path mClipPath;
    private float mClipRadius = 0;
    private int mClipCenterX, mClipCenterY = 0;
    private Animator mAnimator;
    private static final int DEFAULT_DURATION = 600;
    private boolean mIsContentShown = true;

    public RevealLayout(Context context) {
        this(context, null);
    }

    public RevealLayout(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

    @TargetApi(Build.VERSION_CODES.HONEYCOMB)
    public RevealLayout(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        mClipPath = new Path();
        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN_MR2 && Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
            setLayerType(View.LAYER_TYPE_SOFTWARE, null);
        }
    }

    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        mClipCenterX = w / 2;
        mClipCenterY = h / 2;
        if (!mIsContentShown) {
            mClipRadius = 0;
        } else {
            mClipRadius = (float) (Math.sqrt(w * w + h * h) / 2);
        }

        super.onSizeChanged(w, h, oldw, oldh);
    }

    public float getClipRadius() {
        return mClipRadius;
    }

    public void setClipRadius(float clipRadius) {
        mClipRadius = clipRadius;
        invalidate();
    }

    public boolean isContentShown() {
        return mIsContentShown;
    }

    public void setContentShown(boolean isContentShown) {
        mIsContentShown = isContentShown;
        if (mIsContentShown) {
            mClipRadius = 0;
        } else {
            mClipRadius = getMaxRadius(mClipCenterX, mClipCenterY);
        }
        invalidate();
    }

    public void show() {
        show(DEFAULT_DURATION);
    }

    public void hide() {
        hide(DEFAULT_DURATION);
    }

    public void next() {
        next(DEFAULT_DURATION);
    }

    public void show(int duration) {
        show(getWidth() / 2, getHeight() / 2, duration);
    }

    public void hide(int duration) {
        hide(getWidth() / 2, getHeight() / 2, duration);
    }

    public void next(int duration) {
        next(getWidth() / 2, getHeight() / 2, duration);
    }

    public void show(int x, int y) {
        show(x, y, DEFAULT_DURATION);
    }

    public void hide(int x, int y) {
        hide(x, y, DEFAULT_DURATION);
    }

    public void next(int x, int y) {
        next(x, y, DEFAULT_DURATION);
    }

    public void show(int x, int y, int duration) {
        if (x < 0 || x > getWidth() || y < 0 || y > getHeight()) {
            throw new RuntimeException("Center point out of range or call method when View is not initialed yet.");
        }

        mClipCenterX = x;
        mClipCenterY = y;
        float maxRadius = getMaxRadius(x, y);

        if (mAnimator != null && mAnimator.isRunning()) {
            mAnimator.cancel();
        }

        mAnimator = ObjectAnimator.ofFloat(this, "clipRadius", 0f, maxRadius);
        mAnimator.setInterpolator(new BakedBezierInterpolator());
        mAnimator.setDuration(duration);
        mAnimator.addListener(new AnimatorListenerAdapter() {
            @Override
            public void onAnimationEnd(Animator animation) {
                super.onAnimationEnd(animation);
                mIsContentShown = true;
            }
        });
        mAnimator.start();
    }

    public void hide(int x, int y, int duration) {
        if (x < 0 || x > getWidth() || y < 0 || y > getHeight()) {
            throw new RuntimeException("Center point out of range or call method when View is not initialed yet.");
        }

        if (x != mClipCenterX || y != mClipCenterY) {
            mClipCenterX = x;
            mClipCenterY = y;
            mClipRadius = getMaxRadius(x, y);
        }

        if (mAnimator != null && mAnimator.isRunning()) {
            mAnimator.cancel();
        }

        mAnimator = ObjectAnimator.ofFloat(this, "clipRadius", 0f);
        mAnimator.setInterpolator(new BakedBezierInterpolator());
        mAnimator.setDuration(duration);
        mAnimator.addListener(new AnimatorListenerAdapter() {
            @Override
            public void onAnimationEnd(Animator animation) {
                super.onAnimationEnd(animation);
                mIsContentShown = false;
            }
        });
        mAnimator.start();
    }

    public void next(int x, int y, int duration) {
        final int childCount = getChildCount();
        if (childCount > 1) {
            for (int i = 0; i < childCount; i++) {
                View child = getChildAt(i);
                if (i == 0) {
                    bringChildToFront(child);
                }
            }
            show(x, y, duration);
        }
    }

    private float getMaxRadius(int x, int y) {
        int h = Math.max(x, getWidth() - x);
        int v = Math.max(y, getHeight() - y);
        return (float) Math.sqrt(h * h + v * v);
    }

    @Override
    protected boolean drawChild(Canvas canvas, View child, long drawingTime) {
        if (indexOfChild(child) == getChildCount() - 1) {
            boolean result;
            mClipPath.reset();
            mClipPath.addCircle(mClipCenterX, mClipCenterY, mClipRadius, Path.Direction.CW);

            Log.d("RevealLayout", "ClipRadius: " + mClipRadius);
            canvas.save();
            canvas.clipPath(mClipPath);
            result = super.drawChild(canvas, child, drawingTime);
            canvas.restore();
            return result;
        } else {
            return super.drawChild(canvas, child, drawingTime);
        }
    }

}

Java Source Code List

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