Add new views::LabelButton and LabelButtonBorder.

ui/views/controls/button/label_button_unittest.cc

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/utf_string_conversions.h"
+#include "third_party/skia/include/core/SkBitmap.h"
+#include "ui/gfx/canvas.h"
+#include "ui/views/controls/button/label_button.h"
+#include "ui/views/test/views_test_base.h"
+
+namespace {
+
+gfx::ImageSkia CreateTestImage(int width, int height) {
+  SkBitmap bitmap;
+  bitmap.setConfig(SkBitmap::kARGB_8888_Config, width, height);
+  bitmap.allocPixels();
+  return gfx::ImageSkia(bitmap);
+}
+
+}  // namespace
+
+namespace views {
+
+typedef ViewsTestBase LabelButtonTest;
+
+TEST_F(LabelButtonTest, Init) {
+  const string16 text(ASCIIToUTF16("abc"));
+  LabelButton button(NULL, text);
+
+  EXPECT_TRUE(button.GetImage(CustomButton::BS_NORMAL).isNull());
+  EXPECT_TRUE(button.GetImage(CustomButton::BS_HOT).isNull());
+  EXPECT_TRUE(button.GetImage(CustomButton::BS_PUSHED).isNull());
+  EXPECT_TRUE(button.GetImage(CustomButton::BS_DISABLED).isNull());
+
+  EXPECT_EQ(text, button.GetText());
+  EXPECT_EQ(Label::ALIGN_LEFT, button.GetHorizontalAlignment());
+  EXPECT_FALSE(button.default_button());
+  EXPECT_FALSE(button.native_theme());
+  EXPECT_EQ(CustomButton::BS_NORMAL, button.state());
+
+  EXPECT_EQ(button.image_->parent(), &button);
+  EXPECT_EQ(button.label_->parent(), &button);
+}
+
+TEST_F(LabelButtonTest, Label) {
+  LabelButton button(NULL, string16());
+  EXPECT_TRUE(button.GetText().empty());
+
+  const gfx::Font font;
+  const string16 short_text(ASCIIToUTF16("abcdefghijklm"));
+  const string16 long_text(ASCIIToUTF16("abcdefghijklmnopqrstuvwxyz"));
+  const int short_text_width = gfx::Canvas::GetStringWidth(short_text, font);
+  const int long_text_width = gfx::Canvas::GetStringWidth(long_text, font);
+
+  // The width increases monotonically with string size (it does not shrink).
+  EXPECT_LT(button.GetPreferredSize().width(), short_text_width);
+  button.SetText(short_text);
+  EXPECT_GT(button.GetPreferredSize().height(), font.GetHeight());
+  EXPECT_GT(button.GetPreferredSize().width(), short_text_width);
+  EXPECT_LT(button.GetPreferredSize().width(), long_text_width);
+  button.SetText(long_text);
+  EXPECT_GT(button.GetPreferredSize().width(), long_text_width);
+  button.SetText(short_text);
+  EXPECT_GT(button.GetPreferredSize().width(), long_text_width);
+
+  // Clamp the size to a maximum value.
+  button.set_max_size(gfx::Size(long_text_width, 1));
+  EXPECT_EQ(button.GetPreferredSize(), gfx::Size(long_text_width, 1));
+
+  // Clear the monotonically increasing minimum size.
+  button.set_min_size(gfx::Size());
+  EXPECT_GT(button.GetPreferredSize().width(), short_text_width);
+  EXPECT_LT(button.GetPreferredSize().width(), long_text_width);
+}
+
+TEST_F(LabelButtonTest, Image) {
+  LabelButton button(NULL, string16());
+
+  const int small_size = 50, large_size = 100;
+  const gfx::ImageSkia small_image = CreateTestImage(small_size, small_size);
+  const gfx::ImageSkia large_image = CreateTestImage(large_size, large_size);
+
+  // The width increases monotonically with image size (it does not shrink).
+  EXPECT_LT(button.GetPreferredSize().width(), small_size);
+  EXPECT_LT(button.GetPreferredSize().height(), small_size);
+  button.SetImage(CustomButton::BS_NORMAL, small_image);
+  EXPECT_GT(button.GetPreferredSize().width(), small_size);
+  EXPECT_GT(button.GetPreferredSize().height(), small_size);
+  EXPECT_LT(button.GetPreferredSize().width(), large_size);
+  EXPECT_LT(button.GetPreferredSize().height(), large_size);
+  button.SetImage(CustomButton::BS_NORMAL, large_image);
+  EXPECT_GT(button.GetPreferredSize().width(), large_size);
+  EXPECT_GT(button.GetPreferredSize().height(), large_size);
+  button.SetImage(CustomButton::BS_NORMAL, small_image);
+  EXPECT_GT(button.GetPreferredSize().width(), large_size);
+  EXPECT_GT(button.GetPreferredSize().height(), large_size);
+
+  // Clamp the size to a maximum value.
+  button.set_max_size(gfx::Size(large_size, 1));
+  EXPECT_EQ(button.GetPreferredSize(), gfx::Size(large_size, 1));
+
+  // Clear the monotonically increasing minimum size.
+  button.set_min_size(gfx::Size());
+  EXPECT_GT(button.GetPreferredSize().width(), small_size);
+  EXPECT_LT(button.GetPreferredSize().width(), large_size);
+}
+
+TEST_F(LabelButtonTest, LabelAndImage) {
+  LabelButton button(NULL, string16());
+
+  const gfx::Font font;
+  const string16 text(ASCIIToUTF16("abcdefghijklm"));
+  const int text_width = gfx::Canvas::GetStringWidth(text, font);
+
+  const int image_size = 50;
+  const gfx::ImageSkia image = CreateTestImage(image_size, image_size);
+  ASSERT_LT(font.GetHeight(), image_size);
+
+  // The width increases monotonically with content size (it does not shrink).
+  EXPECT_LT(button.GetPreferredSize().width(), text_width);
+  EXPECT_LT(button.GetPreferredSize().width(), image_size);
+  EXPECT_LT(button.GetPreferredSize().height(), image_size);
+  button.SetText(text);
+  EXPECT_GT(button.GetPreferredSize().width(), text_width);
+  EXPECT_GT(button.GetPreferredSize().height(), font.GetHeight());
+  EXPECT_LT(button.GetPreferredSize().width(), text_width + image_size);
+  EXPECT_LT(button.GetPreferredSize().height(), image_size);
+  button.SetImage(CustomButton::BS_NORMAL, image);
+  EXPECT_GT(button.GetPreferredSize().width(), text_width + image_size);
+  EXPECT_GT(button.GetPreferredSize().height(), image_size);
+
+  // Layout and ensure the image is left of the label except for ALIGN_RIGHT.
+  // (A proper parent view or layout manager would Layout on its invalidations).
+  button.SetSize(button.GetPreferredSize());
+  button.Layout();
+  EXPECT_EQ(Label::ALIGN_LEFT, button.GetHorizontalAlignment());
+  EXPECT_LT(button.image_->bounds().right(), button.label_->bounds().x());
+  button.SetHorizontalAlignment(Label::ALIGN_CENTER);
+  button.Layout();
+  EXPECT_EQ(Label::ALIGN_CENTER, button.GetHorizontalAlignment());
+  EXPECT_LT(button.image_->bounds().right(), button.label_->bounds().x());
+  button.SetHorizontalAlignment(Label::ALIGN_RIGHT);
+  button.Layout();
+  EXPECT_EQ(Label::ALIGN_RIGHT, button.GetHorizontalAlignment());
+  EXPECT_LT(button.label_->bounds().right(), button.image_->bounds().x());
+
+  button.SetText(string16());
+  EXPECT_GT(button.GetPreferredSize().width(), text_width + image_size);
+  EXPECT_GT(button.GetPreferredSize().height(), image_size);
+  button.SetImage(CustomButton::BS_NORMAL, gfx::ImageSkia());
+  EXPECT_GT(button.GetPreferredSize().width(), text_width + image_size);
+  EXPECT_GT(button.GetPreferredSize().height(), image_size);
+
+  // Clamp the size to a maximum value.
+  button.set_max_size(gfx::Size(image_size, 1));
+  EXPECT_EQ(button.GetPreferredSize(), gfx::Size(image_size, 1));
+
+  // Clear the monotonically increasing minimum size.
+  button.set_min_size(gfx::Size());
+  EXPECT_LT(button.GetPreferredSize().width(), text_width);
+  EXPECT_LT(button.GetPreferredSize().width(), image_size);
+  EXPECT_LT(button.GetPreferredSize().height(), image_size);
+}
+
+}  // namespace views