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// Copyright (c) 2006-2008 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_VIEWS_ABOUT_CHROME_VIEW_H_
#define CHROME_BROWSER_VIEWS_ABOUT_CHROME_VIEW_H_
#include "chrome/browser/google_update.h"
#include "views/controls/image_view.h"
#include "views/controls/label.h"
#include "views/controls/link.h"
#include "views/view.h"
#include "views/window/dialog_delegate.h"
namespace views {
class TextField;
class Throbber;
class Window;
}
class Profile;
////////////////////////////////////////////////////////////////////////////////
//
// The AboutChromeView class is responsible for drawing the UI controls of the
// About Chrome dialog that allows the user to see what version is installed
// and check for updates.
//
////////////////////////////////////////////////////////////////////////////////
class AboutChromeView : public views::View,
public views::DialogDelegate,
public views::LinkController,
public GoogleUpdateStatusListener {
public:
explicit AboutChromeView(Profile* profile);
virtual ~AboutChromeView();
// Initialize the controls on the dialog.
void Init();
// Overridden from views::View:
virtual gfx::Size GetPreferredSize();
virtual void Layout();
virtual void Paint(ChromeCanvas* canvas);
virtual void ViewHierarchyChanged(bool is_add,
views::View* parent,
views::View* child);
// Overridden from views::DialogDelegate:
virtual std::wstring GetDialogButtonLabel(
MessageBoxFlags::DialogButton button) const;
virtual bool IsDialogButtonEnabled(
MessageBoxFlags::DialogButton button) const;
virtual bool IsDialogButtonVisible(
MessageBoxFlags::DialogButton button) const;
virtual bool CanResize() const;
virtual bool CanMaximize() const;
virtual bool IsAlwaysOnTop() const;
virtual bool HasAlwaysOnTopMenu() const;
virtual bool IsModal() const;
virtual std::wstring GetWindowTitle() const;
virtual bool Accept();
virtual views::View* GetContentsView();
// Overridden from views::LinkController:
virtual void LinkActivated(views::Link* source, int event_flags);
// Overridden from GoogleUpdateStatusListener:
virtual void OnReportResults(GoogleUpdateUpgradeResult result,
GoogleUpdateErrorCode error_code,
const std::wstring& version);
private:
// The visible state of the Check For Updates button.
enum CheckButtonStatus {
CHECKBUTTON_HIDDEN = 0,
CHECKBUTTON_DISABLED,
CHECKBUTTON_ENABLED,
};
// Update the UI to show the status of the upgrade.
void UpdateStatus(GoogleUpdateUpgradeResult result,
GoogleUpdateErrorCode error_code);
// Draws a string onto the canvas (wrapping if needed) while also keeping
// track of where it ends so we can position a URL after the text. The
// parameter |bounds| represents the boundary we have to work with, |position|
// specifies where to draw the string (relative to the top left corner of the
// |bounds| rectangle and |font| specifies the font to use when drawing. When
// the function returns, the parameter |rect| contains where to draw the URL
// (to the right of where we just drew the text) and |position| is updated to
// reflect where to draw the next string after the URL.
// NOTE: The reason why we need this function is because while Skia knows how
// to wrap text appropriately, it doesn't tell us where it drew the last
// character, which we need to position the URLs within the text.
void DrawTextAndPositionUrl(ChromeCanvas* canvas,
const std::wstring& text,
views::Link* link,
gfx::Rect* rect,
gfx::Size* position,
const gfx::Rect& bounds,
const gfx::Font& font);
// A helper function for DrawTextAndPositionUrl, which simply draws the text
// from a certain starting point |position| and wraps within bounds.
// |word_for_word| specifies whether to draw the text word for word or wheter
// to treat the text as one blurb (similar to the way url's are treated inside
// RTL text. For details on the other parameters, see DrawTextAndPositionUrl.
void DrawTextStartingFrom(ChromeCanvas* canvas,
const std::wstring& text,
gfx::Size* position,
const gfx::Rect& bounds,
const gfx::Font& font,
bool word_for_word);
// A simply utility function that calculates whether a word of width
// |word_width| fits at position |position| within the |bounds| rectangle. If
// not, |position| is updated to wrap to the beginning of the next line.
void WrapIfWordDoesntFit(int word_width,
int font_height,
gfx::Size* position,
const gfx::Rect& bounds);
Profile* profile_;
// UI elements on the dialog.
views::ImageView* about_dlg_background_logo_;
views::Label* about_title_label_;
views::TextField* version_label_;
views::Label* copyright_label_;
views::Label* main_text_label_;
int main_text_label_height_;
views::Link* chromium_url_;
gfx::Rect chromium_url_rect_;
views::Link* open_source_url_;
gfx::Rect open_source_url_rect_;
views::Link* terms_of_service_url_;
gfx::Rect terms_of_service_url_rect_;
// UI elements we add to the parent view.
scoped_ptr<views::Throbber> throbber_;
views::ImageView success_indicator_;
views::ImageView update_available_indicator_;
views::ImageView timeout_indicator_;
views::Label update_label_;
// The dialog dimensions.
gfx::Size dialog_dimensions_;
// Keeps track of the visible state of the Check For Updates button.
CheckButtonStatus check_button_status_;
// The text to display as the main label of the About box. We draw this text
// word for word with the help of the WordIterator, and make room for URLs
// which are drawn using views::Link. See also |url_offsets_|.
std::wstring main_label_chunk1_;
std::wstring main_label_chunk2_;
std::wstring main_label_chunk3_;
std::wstring main_label_chunk4_;
std::wstring main_label_chunk5_;
// Determines the order of the two links we draw in the main label.
bool chromium_url_appears_first_;
// The class that communicates with Google Update to find out if an update is
// available and asks it to start an upgrade.
scoped_refptr<GoogleUpdate> google_updater_;
// Our current version.
std::wstring current_version_;
// The version Google Update reports is available to us.
std::wstring new_version_available_;
// Whether text direction is left-to-right or right-to-left.
bool text_direction_is_rtl_;
DISALLOW_COPY_AND_ASSIGN(AboutChromeView);
};
#endif // CHROME_BROWSER_VIEWS_ABOUT_CHROME_VIEW_H_
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