Show Captcha dialog.

chrome/browser/chromeos/login/captcha_view.h

+// Copyright (c) 2010 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 CHROME_BROWSER_CHROMEOS_LOGIN_CAPTCHA_VIEW_H_
+#define CHROME_BROWSER_CHROMEOS_LOGIN_CAPTCHA_VIEW_H_
+
+#include <string>
+
+#include "chrome/browser/chromeos/login/image_decoder.h"
+#include "googleurl/src/gurl.h"
+#include "views/controls/textfield/textfield.h"
+#include "views/window/dialog_delegate.h"
+
+namespace views {
+class ImageView;
+class View;
+class Window;
+}  // namespace views
+
+namespace chromeos {
+
+// A dialog box that shows a CAPTCHA image and allows user to input response.
+class CaptchaView : public views::View,
+                    public views::DialogDelegate,
+                    public views::Textfield::Controller,
+                    public ImageDecoder::Delegate {
+ public:
+  class Delegate {
+   public:
+    // Called when CAPTCHA answer has been entered.
+    virtual void OnCaptchaEntered(const std::string& captcha) = 0;
+
+   protected:
+     virtual ~Delegate() {}
+  };
+
+  // |captcha_url| represents CAPTCHA image URL.
+  explicit CaptchaView(const GURL& captcha_url);
+  virtual ~CaptchaView() {}
+
+  // views::DialogDelegate overrides:
+  virtual bool Accept();
+
+  // views::WindowDelegate overrides:
+  virtual bool IsModal() const { return true; }
+  virtual views::View* GetContentsView() { return this; }
+
+  // views::View overrides:
+  virtual std::wstring GetWindowTitle() const;
+
+  // views::Textfield::Controller implementation:
+  virtual void ContentsChanged(views::Textfield* sender,
+                                 const string16& new_contents) {}
+  virtual bool HandleKeystroke(views::Textfield* sender,
+                               const views::Textfield::Keystroke& keystroke);
+
+  // Overriden from ImageDownloader::Delegate:
+  virtual void OnImageDecoded(const SkBitmap& decoded_image);
+
+  void set_delegate(Delegate* delegate) {
+    delegate_ = delegate;
+  }
+
+ protected:
+  // views::View overrides:
+  virtual gfx::Size GetPreferredSize();
+  virtual void ViewHierarchyChanged(bool is_add,
+                                    views::View* parent,
+                                    views::View* child);
+
+ private:
+  // Initializes UI.
+  void Init();
+
+  Delegate* delegate_;
+  GURL captcha_url_;
+  views::ImageView* captcha_image_;
+  views::Textfield* captcha_textfield_;
+
+  DISALLOW_COPY_AND_ASSIGN(CaptchaView);
+};
+
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_CHROMEOS_LOGIN_CAPTCHA_VIEW_H_