CefMenuButtonDelegate

Header: cef_menu_button_delegate.h
Interfaces: CefMenuButtonPressedLock, CefMenuButtonDelegate
Category: Views Framework

Overview

Browser-process UI toolkit: windows, panels, layouts, buttons, textfields, and their delegates.

CefMenuButtonPressedLock

Source File: include/views/cef_menu_button_delegate.h

Process / Thread Context: Browser Process / UI Thread.

Purpose: A small ref-counted token. When destroyed, the menu button

Usage Example

// Inside OnMenuButtonPressed, store the lock in a member so the button stays
// "pressed" until the popup is hidden.
class MyMenuBtnDelegate : public CefMenuButtonDelegate {
  CefRefPtr<CefMenuButtonPressedLock> lock_;
 public:
  void OnMenuButtonPressed(CefRefPtr<CefMenuButton> btn,
                           const CefPoint& pt,
                           CefRefPtr<CefMenuButtonPressedLock> l) override {
    lock_ = l;
    btn->ShowMenu(menu_, pt, CEF_MENU_ANCHOR_TOPLEFT);
  }
  void OnPopupHidden() { lock_ = nullptr; }  // releases the lock
};

CefMenuButtonDelegate

Source File: include/views/cef_menu_button_delegate.h

Process / Thread Context: Browser Process / UI Thread.

Purpose: Client-implemented delegate for MenuButton press events.

Methods

virtual void OnMenuButtonPressed(CefRefPtr<CefMenuButton> menu_button, const CefPoint& screen_point, CefRefPtr<CefMenuButtonPressedLock> button_pressed_lock) = 0

Parameters:

• menu_button: The button that was pressed.
• screen_point: Suggested menu position in screen coordinates (typically
• button_pressed_lock: Hold a reference to keep the button visually

Return Value: void.

Usage Instruction: Pure virtual — must be implemented. Call

Threading Constraint: Browser process UI thread.