public:

typedef cef_errorcode_t ErrorCode;

typedef cef_transition_type_t TransitionType;

///

/// Called when the loading state has changed. This callback will be executed

/// twice -- once when loading is initiated either programmatically or by user

/// action, and once when loading is terminated due to completion,

/// cancellation of failure. It will be called before any calls to OnLoadStart

/// and after all calls to OnLoadError and/or OnLoadEnd.

///

/*--cef()--*/

virtual void OnLoadingStateChange(CefRefPtr<CefBrowser> browser,

bool isLoading,

bool canGoBack,

bool canGoForward) {}

///

/// Called after a navigation has been committed and before the browser begins

/// loading contents in the frame. The |frame| value will never be empty --

/// call the IsMain() method to check if this frame is the main frame.

/// |transition_type| provides information about the source of the navigation

/// and an accurate value is only available in the browser process. Multiple

/// frames may be loading at the same time. Sub-frames may start or continue

/// loading after the main frame load has ended. This method will not be

/// called for same page navigations (fragments, history state, etc.) or for

/// navigations that fail or are canceled before commit. For notification of

/// overall browser load status use OnLoadingStateChange instead.

///

/*--cef()--*/

virtual void OnLoadStart(CefRefPtr<CefBrowser> browser,

CefRefPtr<CefFrame> frame,

TransitionType transition_type) {}

///

/// Called when the browser is done loading a frame. The |frame| value will

/// never be empty -- call the IsMain() method to check if this frame is the

/// main frame. Multiple frames may be loading at the same time. Sub-frames

/// may start or continue loading after the main frame load has ended. This

/// method will not be called for same page navigations (fragments, history

/// state, etc.) or for navigations that fail or are canceled before commit.

/// For notification of overall browser load status use OnLoadingStateChange

/// instead.

///

/*--cef()--*/

virtual void OnLoadEnd(CefRefPtr<CefBrowser> browser,

CefRefPtr<CefFrame> frame,

int httpStatusCode) {}

///

/// Called when a navigation fails or is canceled. This method may be called

/// by itself if before commit or in combination with OnLoadStart/OnLoadEnd if

/// after commit. |errorCode| is the error code number, |errorText| is the

/// error text and |failedUrl| is the URL that failed to load.

/// See net\base\net_error_list.h for complete descriptions of the error

/// codes.

///

/*--cef(optional_param=errorText)--*/

virtual void OnLoadError(CefRefPtr<CefBrowser> browser,

CefRefPtr<CefFrame> frame,

ErrorCode errorCode,

const CefString& errorText,

const CefString& failedUrl) {}