cef/include/views/cef_window_delegate.h

// Copyright (c) 2016 Marshall A. Greenblatt. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
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//    * Redistributions in binary form must reproduce the above
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// in the documentation and/or other materials provided with the
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//    * Neither the name of Google Inc. nor the name Chromium Embedded
// Framework nor the names of its contributors may be used to endorse
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// ---------------------------------------------------------------------------
//
// The contents of this file must follow a specific format in order to
// support the CEF translator tool. See the translator.README.txt file in the
// tools directory for more information.
//

#ifndef CEF_INCLUDE_VIEWS_CEF_WINDOW_DELEGATE_H_
#define CEF_INCLUDE_VIEWS_CEF_WINDOW_DELEGATE_H_
#pragma once

#include "include/views/cef_panel_delegate.h"

class CefWindow;

///
// Implement this interface to handle window events. The methods of this class
// will be called on the browser process UI thread unless otherwise indicated.
///
/*--cef(source=client)--*/
class CefWindowDelegate : public CefPanelDelegate {
 public:
  ///
  // Called when |window| is created.
  ///
  /*--cef()--*/
  virtual void OnWindowCreated(CefRefPtr<CefWindow> window) {}

  ///
  // Called when |window| is destroyed. Release all references to |window| and
  // do not attempt to execute any methods on |window| after this callback
  // returns.
  ///
  /*--cef()--*/
  virtual void OnWindowDestroyed(CefRefPtr<CefWindow> window) {}

  ///
  // Return the parent for |window| or NULL if the |window| does not have a
  // parent. Windows with parents will not get a taskbar button. Set |is_menu|
  // to true if |window| will be displayed as a menu, in which case it will not
  // be clipped to the parent window bounds. Set |can_activate_menu| to false
  // if |is_menu| is true and |window| should not be activated (given keyboard
  // focus) when displayed.
  ///
  /*--cef()--*/
  virtual CefRefPtr<CefWindow> GetParentWindow(CefRefPtr<CefWindow> window,
                                               bool* is_menu,
                                               bool* can_activate_menu) {
    return nullptr;
  }

  ///
  // Return the initial bounds for |window| in density independent pixel (DIP)
  // coordinates. If this method returns an empty CefRect then
  // GetPreferredSize() will be called to retrieve the size, and the window will
  // be placed on the screen with origin (0,0). This method can be used in
  // combination with CefView::GetBoundsInScreen() to restore the previous
  // window bounds.
  ///
  /*--cef()--*/
  virtual CefRect GetInitialBounds(CefRefPtr<CefWindow> window) {
    return CefRect();
  }

  ///
  // Return the initial show state for |window|.
  ///
  /*--cef(default_retval=CEF_SHOW_STATE_NORMAL)--*/
  virtual cef_show_state_t GetInitialShowState(CefRefPtr<CefWindow> window) {
    return CEF_SHOW_STATE_NORMAL;
  }

  ///
  // Return true if |window| should be created without a frame or title bar. The
  // window will be resizable if CanResize() returns true. Use
  // CefWindow::SetDraggableRegions() to specify draggable regions.
  ///
  /*--cef()--*/
  virtual bool IsFrameless(CefRefPtr<CefWindow> window) { return false; }

  ///
  // Return true if |window| can be resized.
  ///
  /*--cef()--*/
  virtual bool CanResize(CefRefPtr<CefWindow> window) { return true; }

  ///
  // Return true if |window| can be maximized.
  ///
  /*--cef()--*/
  virtual bool CanMaximize(CefRefPtr<CefWindow> window) { return true; }

  ///
  // Return true if |window| can be minimized.
  ///
  /*--cef()--*/
  virtual bool CanMinimize(CefRefPtr<CefWindow> window) { return true; }

  ///
  // Return true if |window| can be closed. This will be called for user-
  // initiated window close actions and when CefWindow::Close() is called.
  ///
  /*--cef()--*/
  virtual bool CanClose(CefRefPtr<CefWindow> window) { return true; }

  ///
  // Called when a keyboard accelerator registered with
  // CefWindow::SetAccelerator is triggered. Return true if the accelerator was
  // handled or false otherwise.
  ///
  /*--cef()--*/
  virtual bool OnAccelerator(CefRefPtr<CefWindow> window, int command_id) {
    return false;
  }

  ///
  // Called after all other controls in the window have had a chance to
  // handle the event. |event| contains information about the keyboard event.
  // Return true if the keyboard event was handled or false otherwise.
  ///
  /*--cef()--*/
  virtual bool OnKeyEvent(CefRefPtr<CefWindow> window,
                          const CefKeyEvent& event) {
    return false;
  }
};

#endif  // CEF_INCLUDE_VIEWS_CEF_WINDOW_DELEGATE_H_