cef/include/views/cef_window_delegate.h

286 lines
11 KiB
C++

// 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:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the name Chromium Embedded
// Framework nor the names of its contributors may be used to endorse
// or promote products derived from this software without specific prior
// written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// ---------------------------------------------------------------------------
//
// 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 closing.
///
/*--cef()--*/
virtual void OnWindowClosing(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) {}
///
/// Called when |window| is activated or deactivated.
///
/*--cef()--*/
virtual void OnWindowActivationChanged(CefRefPtr<CefWindow> window,
bool active) {}
///
/// Called when |window| bounds have changed. |new_bounds| will be in DIP
/// screen coordinates.
///
/*--cef()--*/
virtual void OnWindowBoundsChanged(CefRefPtr<CefWindow> window,
const CefRect& new_bounds) {}
///
/// Called when |window| is transitioning to or from fullscreen mode. On MacOS
/// the transition occurs asynchronously with |is_competed| set to false when
/// the transition starts and true after the transition completes. On other
/// platforms the transition occurs synchronously with |is_completed| set to
/// true after the transition completes. With the Alloy runtime you must also
/// implement CefDisplayHandler::OnFullscreenModeChange to handle fullscreen
/// transitions initiated by browser content.
///
/*--cef()--*/
virtual void OnWindowFullscreenTransition(CefRefPtr<CefWindow> window,
bool is_completed) {}
///
/// 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 true if |window| should be created as a window modal dialog. Only
/// called when a Window is returned via GetParentWindow() with |is_menu| set
/// to false. All controls in the parent Window will be disabled while
/// |window| is visible. This functionality is not supported by all Linux
/// window managers. Alternately, use CefWindow::ShowAsBrowserModalDialog()
/// for a browser modal dialog that works on all platforms.
///
/*--cef()--*/
virtual bool IsWindowModalDialog(CefRefPtr<CefWindow> window) {
return false;
}
///
/// 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| should be created with standard window buttons
/// like close, minimize and zoom. This method is only supported on macOS.
///
/*--cef()--*/
virtual bool WithStandardWindowButtons(CefRefPtr<CefWindow> window) {
return !IsFrameless(window);
}
///
/// Return whether the titlebar height should be overridden, and sets the
/// height of the titlebar in |titlebar_height|. On macOS, it can also be used
/// to adjust the vertical position of the traffic light buttons in frameless
/// windows. The buttons will be positioned halfway down the titlebar at a
/// height of |titlebar_height| / 2.
///
/*--cef()--*/
virtual bool GetTitlebarHeight(CefRefPtr<CefWindow> window,
float* titlebar_height) {
return false;
}
///
/// Return whether the view should accept the initial mouse-down event,
/// allowing it to respond to click-through behavior. If STATE_ENABLED is
/// returned, the view will be sent a mouseDown: message for an initial
/// mouse-down event, activating the view with one click, instead of clicking
/// first to make the window active and then clicking the view.
///
/// This method is only supported on macOS. For more details, refer to the
/// documentation of acceptsFirstMouse.
///
/*--cef(default_retval=STATE_DEFAULT)--*/
virtual cef_state_t AcceptsFirstMouse(CefRefPtr<CefWindow> window) {
return STATE_DEFAULT;
}
///
/// 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;
}
///
/// Called after the native/OS or Chrome theme for |window| has changed.
/// |chrome_theme| will be true if the notification is for a Chrome theme.
///
/// Native/OS theme colors are configured globally and do not need to be
/// customized for each Window individually. An example of a native/OS theme
/// change that triggers this callback is when the user switches between dark
/// and light mode during application lifespan. Native/OS theme changes can be
/// disabled by passing the `--force-dark-mode` or `--force-light-mode`
/// command-line flag.
///
/// Chrome theme colors will be applied and this callback will be triggered
/// if/when a BrowserView is added to the Window's component hierarchy. Chrome
/// theme colors can be configured on a per-RequestContext basis using
/// CefRequestContext::SetChromeColorScheme or (Chrome runtime only) by
/// visiting chrome://settings/manageProfile. Any theme changes using those
/// mechanisms will also trigger this callback. Chrome theme colors will be
/// persisted and restored from disk cache with the Chrome runtime, and with
/// the Alloy runtime if persist_user_preferences is set to true via
/// CefSettings or CefRequestContextSettings.
///
/// This callback is not triggered on Window creation so clients that wish to
/// customize the initial native/OS theme must call CefWindow::SetThemeColor
/// and CefWindow::ThemeChanged before showing the first Window.
///
/// Theme colors will be reset to standard values before this callback is
/// called for the first affected Window. Call CefWindow::SetThemeColor from
/// inside this callback to override a standard color or add a custom color.
/// CefViewDelegate::OnThemeChanged will be called after this callback for the
/// complete |window| component hierarchy.
///
/*--cef()--*/
virtual void OnThemeColorsChanged(CefRefPtr<CefWindow> window,
bool chrome_theme) {}
///
/// Optionally change the runtime style for this Window. See
/// cef_runtime_style_t documentation for details.
///
/*--cef(default_retval=CEF_RUNTIME_STYLE_DEFAULT)--*/
virtual cef_runtime_style_t GetWindowRuntimeStyle() {
return CEF_RUNTIME_STYLE_DEFAULT;
}
};
#endif // CEF_INCLUDE_VIEWS_CEF_WINDOW_DELEGATE_H_