SquareTextView.java

/*
 * Copyright 2013 Google Inc.
 *
 * 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.google.maps.android.ui;

import android.content.Context;
import android.graphics.Canvas;
import android.util.AttributeSet;
import android.widget.TextView;

public class SquareTextView extends TextView {
    private int mOffsetTop = 0;
    private int mOffsetLeft = 0;

    public SquareTextView(Context context) {
        super(context);
    }

    public SquareTextView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public SquareTextView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        int width = getMeasuredWidth();
        int height = getMeasuredHeight();
        int dimension = Math.max(width, height);
        if (width > height) {
            mOffsetTop = width - height;
            mOffsetLeft = 0;
        } else {
            mOffsetTop = 0;
            mOffsetLeft = height - width;
        }
        setMeasuredDimension(dimension, dimension);
    }

    @Override
    public void draw(Canvas canvas) {
        canvas.translate(mOffsetLeft / 2, mOffsetTop / 2);
        super.draw(canvas);
    }
}