public:

typedef cef_cursor_type_t CursorType;

typedef cef_drag_operations_mask_t DragOperation;

typedef cef_drag_operations_mask_t DragOperationsMask;

typedef cef_paint_element_type_t PaintElementType;

typedef std::vector<CefRect> RectList;

///

// Called to retrieve the root window rectangle in screen coordinates. Return

// true if the rectangle was provided.

///

/*--cef()--*/

virtual bool GetRootScreenRect(CefRefPtr<CefBrowser> browser,

CefRect& rect) { return false; }

///

// Called to retrieve the view rectangle which is relative to screen

// coordinates. Return true if the rectangle was provided.

///

/*--cef()--*/

virtual bool GetViewRect(CefRefPtr<CefBrowser> browser, CefRect& rect) =0;

///

// Called to retrieve the translation from view coordinates to actual screen

// coordinates. Return true if the screen coordinates were provided.

///

/*--cef()--*/

virtual bool GetScreenPoint(CefRefPtr<CefBrowser> browser,

int viewX,

int viewY,

int& screenX,

int& screenY) { return false; }

///

// Called to allow the client to fill in the CefScreenInfo object with

// appropriate values. Return true if the |screen_info| structure has been

// modified.

//

// If the screen info rectangle is left empty the rectangle from GetViewRect

// will be used. If the rectangle is still empty or invalid popups may not be

// drawn correctly.

///

/*--cef()--*/

virtual bool GetScreenInfo(CefRefPtr<CefBrowser> browser,

CefScreenInfo& screen_info) { return false; }

///

// Called when the browser wants to show or hide the popup widget. The popup

// should be shown if |show| is true and hidden if |show| is false.

///

/*--cef()--*/

virtual void OnPopupShow(CefRefPtr<CefBrowser> browser,

bool show) {}

///

// Called when the browser wants to move or resize the popup widget. |rect|

// contains the new location and size in view coordinates.

///

/*--cef()--*/

virtual void OnPopupSize(CefRefPtr<CefBrowser> browser,

const CefRect& rect) {}

///

// Called when an element should be painted. Pixel values passed to this

// method are scaled relative to view coordinates based on the value of

// CefScreenInfo.device_scale_factor returned from GetScreenInfo. |type|

// indicates whether the element is the view or the popup widget. |buffer|

// contains the pixel data for the whole image. |dirtyRects| contains the set

// of rectangles in pixel coordinates that need to be repainted. |buffer| will

// be |width|*|height|*4 bytes in size and represents a BGRA image with an

// upper-left origin.

///

/*--cef()--*/

virtual void OnPaint(CefRefPtr<CefBrowser> browser,

PaintElementType type,

const RectList& dirtyRects,

const void* buffer,

int width, int height) =0;

///

// Called when the browser's cursor has changed. If |type| is CT_CUSTOM then

// |custom_cursor_info| will be populated with the custom cursor information.

///

/*--cef()--*/

virtual void OnCursorChange(CefRefPtr<CefBrowser> browser,

CefCursorHandle cursor,

CursorType type,

const CefCursorInfo& custom_cursor_info) {}

///

// Called when the user starts dragging content in the web view. Contextual

// information about the dragged content is supplied by |drag_data|.

// (|x|, |y|) is the drag start location in screen coordinates.

// OS APIs that run a system message loop may be used within the

// StartDragging call.

//

// Return false to abort the drag operation. Don't call any of

// CefBrowserHost::DragSource*Ended* methods after returning false.

//

// Return true to handle the drag operation. Call

// CefBrowserHost::DragSourceEndedAt and DragSourceSystemDragEnded either

// synchronously or asynchronously to inform the web view that the drag

// operation has ended.

///

/*--cef()--*/

virtual bool StartDragging(CefRefPtr<CefBrowser> browser,

CefRefPtr<CefDragData> drag_data,

DragOperationsMask allowed_ops,

int x, int y) { return false; }

///

// Called when the web view wants to update the mouse cursor during a

// drag & drop operation. |operation| describes the allowed operation

// (none, move, copy, link).

///

/*--cef()--*/

virtual void UpdateDragCursor(CefRefPtr<CefBrowser> browser,

DragOperation operation) {}

///

// Called when the scroll offset has changed.

///

/*--cef()--*/

virtual void OnScrollOffsetChanged(CefRefPtr<CefBrowser> browser,

double x,

double y) {}