src/ui/views/controls/button/image_button_unittest.cc

   1 // Copyright (c) 2012 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 #include "testing/gtest/include/gtest/gtest.h"
   6 #include "ui/base/layout.h"
   7 #include "ui/views/border.h"
   8 #include "ui/views/controls/button/image_button.h"
   9 #include "ui/views/test/views_test_base.h"
  10
  11 namespace {
  12
  13 gfx::ImageSkia CreateTestImage(int width, int height) {
  14   SkBitmap bitmap;
  15   bitmap.allocN32Pixels(width, height);
  16   return gfx::ImageSkia::CreateFrom1xBitmap(bitmap);
  17 }
  18
  19 }  // namespace
  20
  21 namespace views {
  22
  23 typedef ViewsTestBase ImageButtonTest;
  24
  25 TEST_F(ImageButtonTest, Basics) {
  26   ImageButton button(NULL);
  27
  28   // Our image to paint starts empty.
  29   EXPECT_TRUE(button.GetImageToPaint().isNull());
  30
  31   // Without an image, buttons are 16x14 by default.
  32   EXPECT_EQ("16x14", button.GetPreferredSize().ToString());
  33
  34   // The minimum image size should be applied even when there is no image.
  35   button.SetMinimumImageSize(gfx::Size(5, 15));
  36   EXPECT_EQ("5x15", button.minimum_image_size().ToString());
  37   EXPECT_EQ("16x15", button.GetPreferredSize().ToString());
  38
  39   // Set a normal image.
  40   gfx::ImageSkia normal_image = CreateTestImage(10, 20);
  41   button.SetImage(CustomButton::STATE_NORMAL, &normal_image);
  42
  43   // Image uses normal image for painting.
  44   EXPECT_FALSE(button.GetImageToPaint().isNull());
  45   EXPECT_EQ(10, button.GetImageToPaint().width());
  46   EXPECT_EQ(20, button.GetImageToPaint().height());
  47
  48   // Preferred size is the normal button size.
  49   EXPECT_EQ("10x20", button.GetPreferredSize().ToString());
  50
  51   // Set a pushed image.
  52   gfx::ImageSkia pushed_image = CreateTestImage(11, 21);
  53   button.SetImage(CustomButton::STATE_PRESSED, &pushed_image);
  54
  55   // By convention, preferred size doesn't change, even though pushed image
  56   // is bigger.
  57   EXPECT_EQ("10x20", button.GetPreferredSize().ToString());
  58
  59   // We're still painting the normal image.
  60   EXPECT_FALSE(button.GetImageToPaint().isNull());
  61   EXPECT_EQ(10, button.GetImageToPaint().width());
  62   EXPECT_EQ(20, button.GetImageToPaint().height());
  63
  64   // The minimum image size should make the preferred size bigger.
  65   button.SetMinimumImageSize(gfx::Size(15, 5));
  66   EXPECT_EQ("15x5", button.minimum_image_size().ToString());
  67   EXPECT_EQ("15x20", button.GetPreferredSize().ToString());
  68   button.SetMinimumImageSize(gfx::Size(15, 25));
  69   EXPECT_EQ("15x25", button.minimum_image_size().ToString());
  70   EXPECT_EQ("15x25", button.GetPreferredSize().ToString());
  71 }
  72
  73 TEST_F(ImageButtonTest, SetAndGetImage) {
  74   ImageButton button(NULL);
  75
  76   // Images start as null.
  77   EXPECT_TRUE(button.GetImage(Button::STATE_NORMAL).isNull());
  78   EXPECT_TRUE(button.GetImage(Button::STATE_HOVERED).isNull());
  79   EXPECT_TRUE(button.GetImage(Button::STATE_PRESSED).isNull());
  80   EXPECT_TRUE(button.GetImage(Button::STATE_DISABLED).isNull());
  81
  82   // Setting images works as expected.
  83   gfx::ImageSkia image1 = CreateTestImage(10, 11);
  84   gfx::ImageSkia image2 = CreateTestImage(20, 21);
  85   button.SetImage(Button::STATE_NORMAL, &image1);
  86   button.SetImage(Button::STATE_HOVERED, &image2);
  87   EXPECT_TRUE(
  88       button.GetImage(Button::STATE_NORMAL).BackedBySameObjectAs(image1));
  89   EXPECT_TRUE(
  90       button.GetImage(Button::STATE_HOVERED).BackedBySameObjectAs(image2));
  91   EXPECT_TRUE(button.GetImage(Button::STATE_PRESSED).isNull());
  92   EXPECT_TRUE(button.GetImage(Button::STATE_DISABLED).isNull());
  93
  94   // ImageButton supports NULL image pointers.
  95   button.SetImage(Button::STATE_NORMAL, NULL);
  96   EXPECT_TRUE(button.GetImage(Button::STATE_NORMAL).isNull());
  97 }
  98
  99 TEST_F(ImageButtonTest, ImagePositionWithBorder) {
 100   ImageButton button(NULL);
 101   gfx::ImageSkia image = CreateTestImage(20, 30);
 102   button.SetImage(CustomButton::STATE_NORMAL, &image);
 103
 104   // The image should be painted at the top-left corner.
 105   EXPECT_EQ(gfx::Point().ToString(),
 106             button.ComputeImagePaintPosition(image).ToString());
 107
 108   button.SetBorder(views::Border::CreateEmptyBorder(10, 5, 0, 0));
 109   EXPECT_EQ(gfx::Point(5, 10).ToString(),
 110             button.ComputeImagePaintPosition(image).ToString());
 111
 112   button.SetBorder(Border::NullBorder());
 113   button.SetBounds(0, 0, 50, 50);
 114   EXPECT_EQ(gfx::Point().ToString(),
 115             button.ComputeImagePaintPosition(image).ToString());
 116
 117   button.SetImageAlignment(ImageButton::ALIGN_CENTER,
 118                            ImageButton::ALIGN_MIDDLE);
 119   EXPECT_EQ(gfx::Point(15, 10).ToString(),
 120             button.ComputeImagePaintPosition(image).ToString());
 121   button.SetBorder(views::Border::CreateEmptyBorder(10, 10, 0, 0));
 122   EXPECT_EQ(gfx::Point(20, 15).ToString(),
 123             button.ComputeImagePaintPosition(image).ToString());
 124
 125   // The entire button's size should take the border into account.
 126   EXPECT_EQ(gfx::Size(30, 40).ToString(), button.GetPreferredSize().ToString());
 127
 128   // The border should be added on top of the minimum image size.
 129   button.SetMinimumImageSize(gfx::Size(30, 5));
 130   EXPECT_EQ(gfx::Size(40, 40).ToString(), button.GetPreferredSize().ToString());
 131 }
 132
 133 TEST_F(ImageButtonTest, LeftAlignedMirrored) {
 134   ImageButton button(NULL);
 135   gfx::ImageSkia image = CreateTestImage(20, 30);
 136   button.SetImage(CustomButton::STATE_NORMAL, &image);
 137   button.SetBounds(0, 0, 50, 30);
 138   button.SetImageAlignment(ImageButton::ALIGN_LEFT,
 139                            ImageButton::ALIGN_BOTTOM);
 140   button.SetDrawImageMirrored(true);
 141
 142   // Because the coordinates are flipped, we should expect this to draw as if
 143   // it were ALIGN_RIGHT.
 144   EXPECT_EQ(gfx::Point(30, 0).ToString(),
 145             button.ComputeImagePaintPosition(image).ToString());
 146 }
 147
 148 TEST_F(ImageButtonTest, RightAlignedMirrored) {
 149   ImageButton button(NULL);
 150   gfx::ImageSkia image = CreateTestImage(20, 30);
 151   button.SetImage(CustomButton::STATE_NORMAL, &image);
 152   button.SetBounds(0, 0, 50, 30);
 153   button.SetImageAlignment(ImageButton::ALIGN_RIGHT,
 154                            ImageButton::ALIGN_BOTTOM);
 155   button.SetDrawImageMirrored(true);
 156
 157   // Because the coordinates are flipped, we should expect this to draw as if
 158   // it were ALIGN_LEFT.
 159   EXPECT_EQ(gfx::Point(0, 0).ToString(),
 160             button.ComputeImagePaintPosition(image).ToString());
 161 }
 162
 163 }  // namespace views