Add views/examples/menu_example.h

The example demonstrates how to create a menu with regular, radio, and
check items.  The example revealed a bug: http://crbug.com/30310.
I have a separate change to fix the bug.

TEST=try; manually
BUG=30310

Review URL: http://codereview.chromium.org/495017

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@34640 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 209 insertions, 1 deletions

diff --git a/views/examples/examples_main.cc b/views/examples/examples_main.cc
index 81137c59..93bbaf4 100644
--- a/views/examples/examples_main.cc
+++ b/views/examples/examples_main.cc
@@ -14,6 +14,7 @@
 #include "views/examples/button_example.h"
 #include "views/examples/combobox_example.h"
 #include "views/examples/message_box_example.h"
+#include "views/examples/menu_example.h"
 #include "views/examples/radio_button_example.h"
 #include "views/examples/scroll_view_example.h"
 // Slider is not yet ported to Windows.
@@ -80,8 +81,10 @@ void ExamplesMain::Run() {
   layout->StartRow(0 /* no expand */, 0);
   layout->AddView(status_label_);
 
+  // TODO(satorux): The window is getting wide.  Eventually, we would have
+  // the second tabbed pane.
   views::Window* window =
-      views::Window::CreateChromeWindow(NULL, gfx::Rect(0, 0, 750, 300), this);
+      views::Window::CreateChromeWindow(NULL, gfx::Rect(0, 0, 850, 300), this);
 
   examples::TextfieldExample textfield_example(this);
   tabbed_pane->AddTab(textfield_example.GetExampleTitle(),
@@ -131,6 +134,10 @@ void ExamplesMain::Run() {
                       slider_example.GetExampleView());
 #endif
 
+  examples::MenuExample menu_example(this);
+  tabbed_pane->AddTab(menu_example.GetExampleTitle(),
+                      menu_example.GetExampleView());
+
   window->Show();
   views::AcceleratorHandler accelerator_handler;
   MessageLoopForUI::current()->Run(&accelerator_handler);
diff --git a/views/examples/menu_example.h b/views/examples/menu_example.h
new file mode 100644
index 0000000..80e276d
--- /dev/null
+++ b/views/examples/menu_example.h
@@ -0,0 +1,199 @@
+// Copyright (c) 2009 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.
+
+#ifndef VIEWS_EXAMPLES_MENU_EXAMPLE_H_
+#define VIEWS_EXAMPLES_MENU_EXAMPLE_H_
+
+#include <set>
+
+#include "app/menus/simple_menu_model.h"
+#include "views/controls/button/menu_button.h"
+#include "views/controls/menu/menu_2.h"
+#include "views/controls/menu/view_menu_delegate.h"
+#include "views/controls/button/text_button.h"
+#include "views/examples/example_base.h"
+#include "views/fill_layout.h"
+
+namespace examples {
+
+class ExampleMenuContents : public menus::SimpleMenuModel,
+                            public menus::SimpleMenuModel::Delegate {
+  enum {
+    kGroupMakeDecision,
+  };
+
+  enum {
+    kCommandDoSomething,
+    kCommandSelectAscii,
+    kCommandSelectUtf8,
+    kCommandSelectUtf16,
+    kCommandCheckApple,
+    kCommandCheckOrange,
+    kCommandCheckKiwi,
+    kCommandGoHome,
+  };
+
+ public:
+  ExampleMenuContents() :
+      ALLOW_THIS_IN_INITIALIZER_LIST(menus::SimpleMenuModel(this)),
+      current_encoding_command_id_(kCommandSelectAscii) {
+    AddItem(kCommandDoSomething, WideToUTF16(L"Do Something"));
+    AddSeparator();
+    AddRadioItem(kCommandSelectAscii,
+                 WideToUTF16(L"ASCII"), kGroupMakeDecision);
+    AddRadioItem(kCommandSelectUtf8,
+                 WideToUTF16(L"UTF-8"), kGroupMakeDecision);
+    AddRadioItem(kCommandSelectUtf16,
+                 WideToUTF16(L"UTF-16"), kGroupMakeDecision);
+    AddSeparator();
+    AddCheckItem(kCommandCheckApple, WideToUTF16(L"Apple"));
+    AddCheckItem(kCommandCheckOrange, WideToUTF16(L"Orange"));
+    AddCheckItem(kCommandCheckKiwi, WideToUTF16(L"Kiwi"));
+    AddSeparator();
+    AddItem(kCommandGoHome, WideToUTF16(L"Go Home"));
+    menu_.reset(new views::Menu2(this));
+  }
+
+  void RunMenuAt(const gfx::Point& point) {
+    menu_->RunMenuAt(point, views::Menu2::ALIGN_TOPRIGHT);
+  }
+
+  // menus::SimpleMenuModel::Delegate implementation.
+  virtual bool IsCommandIdChecked(int command_id) const {
+    // Radio items.
+    if (command_id == current_encoding_command_id_) {
+      return true;
+    }
+
+    // Check items.
+    if (checked_fruits_.find(command_id) != checked_fruits_.end()) {
+      return true;
+    }
+    return false;
+  }
+
+  virtual bool IsCommandIdEnabled(int command_id) const {
+    // All commands are enabled except for kCommandGoHome.
+    return command_id != kCommandGoHome;
+  }
+
+  virtual bool GetAcceleratorForCommandId(
+      int command_id,
+      menus::Accelerator* accelerator) {
+    // We don't use this in the example.
+    return false;
+  }
+
+  virtual void ExecuteCommand(int command_id) {
+    switch (command_id) {
+      case kCommandDoSomething: {
+        LOG(INFO) << "Done something";
+        break;
+      }
+
+      // Radio items.
+      case kCommandSelectAscii: {
+        current_encoding_command_id_ = kCommandSelectAscii;
+        LOG(INFO) << "Selected ASCII";
+        break;
+      }
+      case kCommandSelectUtf8: {
+        current_encoding_command_id_ = kCommandSelectUtf8;
+        LOG(INFO) << "Selected UTF-8";
+        break;
+      }
+      case kCommandSelectUtf16: {
+        current_encoding_command_id_ = kCommandSelectUtf16;
+        LOG(INFO) << "Selected UTF-16";
+        break;
+      }
+
+      // Check items.
+      case kCommandCheckApple:
+      case kCommandCheckOrange:
+      case kCommandCheckKiwi: {
+        // Print what fruit is checked.
+        const char* checked_fruit = "";
+        if (command_id == kCommandCheckApple) {
+          checked_fruit = "Apple";
+        } else if (command_id == kCommandCheckOrange) {
+          checked_fruit = "Orange";
+        } else if (command_id == kCommandCheckKiwi) {
+          checked_fruit = "Kiwi";
+        }
+        LOG(INFO) << "Checked " << checked_fruit;
+
+        // Update the check status.
+        std::set<int>::iterator iter = checked_fruits_.find(command_id);
+        if (iter == checked_fruits_.end()) {
+          checked_fruits_.insert(command_id);
+        } else {
+          checked_fruits_.erase(iter);
+        }
+        break;
+      }
+    }
+  }
+
+ private:
+  scoped_ptr<views::Menu2> menu_;
+  std::set<int> checked_fruits_;
+  int current_encoding_command_id_;
+
+  DISALLOW_COPY_AND_ASSIGN(ExampleMenuContents);
+};
+
+class ExampleMenuButton : public views::MenuButton,
+                          public views::ViewMenuDelegate {
+ public:
+  ExampleMenuButton(const std::wstring& test,
+                    bool show_menu_marker)
+      : ALLOW_THIS_IN_INITIALIZER_LIST(
+          views::MenuButton(NULL, test, this, show_menu_marker)) {
+  }
+
+ private:
+  // views::ViewMenuDelegate implementation.
+  virtual void RunMenu(views::View* source, const gfx::Point& point) {
+    if (menu_contents_ == NULL) {
+      menu_contents_.reset(new ExampleMenuContents);
+    }
+    menu_contents_->RunMenuAt(point);
+  }
+
+  scoped_ptr<ExampleMenuContents> menu_contents_;
+  DISALLOW_COPY_AND_ASSIGN(ExampleMenuButton);
+};
+
+// MenuExample demonstrates how to use the Menu class.
+class MenuExample : public ExampleBase {
+ public:
+  explicit MenuExample(ExamplesMain* main)
+      : ExampleBase(main) {
+  }
+
+  virtual ~MenuExample() {}
+
+  virtual std::wstring GetExampleTitle() {
+    return L"Menu";
+  }
+
+  virtual void CreateExampleView(views::View* container) {
+    // views::Menu2 is not a sub class of View, hence we cannot directly
+    // add to the continer. Instead, we add a button to open a menu.
+    const bool show_menu_marker = true;
+    ExampleMenuButton* menu_button = new ExampleMenuButton(
+        L"Open a menu", show_menu_marker);
+    container->SetLayoutManager(new views::FillLayout);
+    container->AddChildView(menu_button);
+  }
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(MenuExample);
+};
+
+}  // namespace examples
+
+#endif  // VIEWS_EXAMPLES_MENU_EXAMPLE_H_
+
diff --git a/views/views.gyp b/views/views.gyp
index dc0de4d..c48e5de 100644
--- a/views/views.gyp
+++ b/views/views.gyp
@@ -364,8 +364,10 @@
         'examples/examples_main.cc',
         'examples/examples_main.h',
         'examples/message_box_example.h',
+        'examples/menu_example.h',
         'examples/radio_button_example.h',
         'examples/scroll_view_example.h',
+        'examples/slider_example.h',
         'examples/tabbed_pane_example.h',
         'examples/textfield_example.h',
         'examples/widget_example.h',