CircleView.java

/*
 * Copyright 2016 Flipkart Internet Pvt. Ltd.
 *
 * 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.flipkart.android.proteus.demo.customviews;

import android.annotation.TargetApi;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.os.Build;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewTreeObserver;

import com.flipkart.android.proteus.view.ProteusView;
import com.flipkart.android.proteus.view.manager.ProteusViewManager;

/**
 * CircleView
 *
 * @author aditya.sharat
 */

public class CircleView extends View implements ProteusView {

    public void setColor(String HEX_COLOR) {
        this.HEX_COLOR = HEX_COLOR;
    }

    ProteusViewManager viewManager;

    @Override
    public ProteusViewManager getViewManager() {
        return viewManager;
    }

    @Override
    public void setViewManager(ProteusViewManager viewManager) {
        this.viewManager = viewManager;
    }

    private String HEX_COLOR = "#45ba8a";
    private Paint drawPaint;
    private float radius;

    public CircleView(Context context) {
        super(context);
        init();
    }

    public CircleView(final Context context, final AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    private void init() {
        drawPaint = new Paint();
        drawPaint.setColor(Color.parseColor(HEX_COLOR));
        drawPaint.setAntiAlias(true);
        setOnMeasureCallback();
    }

    @Override
    protected void onDraw(final Canvas canvas) {
        super.onDraw(canvas);
        canvas.drawCircle(radius, radius, radius, drawPaint);
    }

    private void setOnMeasureCallback() {
        ViewTreeObserver vto = getViewTreeObserver();
        vto.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
            @Override
            public void onGlobalLayout() {
                removeOnGlobalLayoutListener(this);
                radius = getMeasuredWidth() / 2;
            }
        });
    }

    @TargetApi(Build.VERSION_CODES.JELLY_BEAN)
    private void removeOnGlobalLayoutListener(ViewTreeObserver.OnGlobalLayoutListener listener) {
        if (Build.VERSION.SDK_INT < 16) {
            getViewTreeObserver().removeGlobalOnLayoutListener(listener);
        } else {
            getViewTreeObserver().removeOnGlobalLayoutListener(listener);
        }
    }
}