is Touch In Circle Button - Android Graphics

Android examples for Graphics:Canvas

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Description

is Touch In Circle Button

Demo Code


//package com.java2s;

public class Main {
    public static boolean isTouchInCircleButton(int buttonWidth,
            int buttonHeight, int touchX, int touchY) {
        int buttonCenterX = buttonWidth / 2;
        int buttonCenterY = buttonHeight / 2;

        int touchDifferenceToMidX = Math.abs(touchX - buttonCenterX);
        int touchDifferenceToMidY = Math.abs(touchY - buttonCenterY);
        int touchRadius = (int) Math.sqrt(touchDifferenceToMidX
                * touchDifferenceToMidX + touchDifferenceToMidY
                * touchDifferenceToMidY);

        int radiusButton;

        if (buttonHeight > buttonWidth) {
            radiusButton = buttonWidth / 2;
        } else {//from w  w w  .jav a  2  s.  c om
            radiusButton = buttonHeight / 2;
        }

        return (touchRadius <= radiusButton);
    }
}

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