| 1 | // Copyright 2013 The Chromium Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | package org.chromium.ui; |
| 6 | import android.content.Context; |
| 7 | import android.graphics.Canvas; |
| 8 | import android.graphics.Color; |
| 9 | import android.graphics.Paint; |
| 10 | import android.graphics.Paint.Style; |
| 11 | import android.util.AttributeSet; |
| 12 | import android.widget.Button; |
| 13 | |
| 14 | /** |
| 15 | * Simple class that draws a white border around a button, purely for a UI change. |
| 16 | */ |
| 17 | public class ColorPickerMoreButton extends Button { |
| 18 | |
| 19 | // A cache for the paint used to draw the border, so it doesn't have to be created in |
| 20 | // every onDraw() call. |
| 21 | private Paint mBorderPaint; |
| 22 | |
| 23 | public ColorPickerMoreButton(Context context, AttributeSet attrs) { |
| 24 | super(context, attrs); |
| 25 | init(); |
| 26 | } |
| 27 | |
| 28 | public ColorPickerMoreButton(Context context, AttributeSet attrs, int defStyle) { |
| 29 | super(context, attrs, defStyle); |
| 30 | init(); |
| 31 | } |
| 32 | |
| 33 | /** |
| 34 | * Sets up the paint to use for drawing the border. |
| 35 | */ |
| 36 | public void init() { |
| 37 | mBorderPaint = new Paint(); |
| 38 | mBorderPaint.setStyle(Paint.Style.STROKE); |
| 39 | mBorderPaint.setColor(Color.WHITE); |
| 40 | // Set the width to one pixel. |
| 41 | mBorderPaint.setStrokeWidth(1.0f); |
| 42 | // And make sure the border doesn't bleed into the outside. |
| 43 | mBorderPaint.setAntiAlias(false); |
| 44 | } |
| 45 | |
| 46 | /** |
| 47 | * Draws the border around the edge of the button. |
| 48 | * |
| 49 | * @param canvas The canvas to draw on. |
| 50 | */ |
| 51 | @Override |
| 52 | protected void onDraw(Canvas canvas) { |
| 53 | canvas.drawRect(0.5f, 0.5f, getWidth() - 1.5f, getHeight() - 1.5f, mBorderPaint); |
| 54 | super.onDraw(canvas); |
| 55 | } |
| 56 | } |