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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_VIEWS_WIDGET_NATIVE_WIDGET_WIN_H_
#define UI_VIEWS_WIDGET_NATIVE_WIDGET_WIN_H_
#pragma once
#include <atlbase.h>
#include <atlapp.h>
#include <atlcrack.h>
#include <atlmisc.h>
#include <string>
#include <vector>
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/scoped_vector.h"
#include "base/memory/weak_ptr.h"
#include "base/message_loop.h"
#include "base/win/scoped_comptr.h"
#include "base/win/win_util.h"
#include "ui/base/win/window_impl.h"
#include "ui/views/focus/focus_manager.h"
#include "ui/views/layout/layout_manager.h"
#include "ui/views/widget/native_widget_private.h"
namespace ui {
class Compositor;
class ViewProp;
}
namespace gfx {
class Canvas;
class Font;
class Rect;
}
namespace views {
class DropTargetWin;
class RootView;
class TooltipManagerWin;
// These two messages aren't defined in winuser.h, but they are sent to windows
// with captions. They appear to paint the window caption and frame.
// Unfortunately if you override the standard non-client rendering as we do
// with CustomFrameWindow, sometimes Windows (not deterministically
// reproducibly but definitely frequently) will send these messages to the
// window and paint the standard caption/title over the top of the custom one.
// So we need to handle these messages in CustomFrameWindow to prevent this
// from happening.
const int WM_NCUAHDRAWCAPTION = 0xAE;
const int WM_NCUAHDRAWFRAME = 0xAF;
///////////////////////////////////////////////////////////////////////////////
//
// NativeWidgetWin
// A Widget for a views hierarchy used to represent anything that can be
// contained within an HWND, e.g. a control, a window, etc. Specializations
// suitable for specific tasks, e.g. top level window, are derived from this.
//
// This Widget contains a RootView which owns the hierarchy of views within it.
// As long as views are part of this tree, they will be deleted automatically
// when the RootView is destroyed. If you remove a view from the tree, you are
// then responsible for cleaning up after it.
//
///////////////////////////////////////////////////////////////////////////////
class VIEWS_EXPORT NativeWidgetWin : public ui::WindowImpl,
public MessageLoopForUI::Observer,
public internal::NativeWidgetPrivate {
public:
explicit NativeWidgetWin(internal::NativeWidgetDelegate* delegate);
virtual ~NativeWidgetWin();
// Returns true if we are on Windows Vista or greater and composition is
// enabled.
static bool IsAeroGlassEnabled();
// Returns the system set window title font.
static gfx::Font GetWindowTitleFont();
// Show the window with the specified show command.
void Show(int show_state);
// Disable Layered Window updates by setting to false.
void set_can_update_layered_window(bool can_update_layered_window) {
can_update_layered_window_ = can_update_layered_window;
}
// Obtain the view event with the given MSAA child id. Used in
// NativeViewAccessibilityWin::get_accChild to support requests for
// children of windowless controls. May return NULL
// (see ViewHierarchyChanged).
View* GetAccessibilityViewEventAt(int id);
// Add a view that has recently fired an accessibility event. Returns a MSAA
// child id which is generated by: -(index of view in vector + 1) which
// guarantees a negative child id. This distinguishes the view from
// positive MSAA child id's which are direct leaf children of views that have
// associated hWnd's (e.g. NativeWidgetWin).
int AddAccessibilityViewEvent(View* view);
// Clear a view that has recently been removed on a hierarchy change.
void ClearAccessibilityViewEvent(View* view);
// Hides the window if it hasn't already been force-hidden. The force hidden
// count is tracked, so calling multiple times is allowed, you just have to
// be sure to call PopForceHidden the same number of times.
void PushForceHidden();
// Decrements the force hidden count, showing the window if we have reached
// the top of the stack. See PushForceHidden.
void PopForceHidden();
BOOL IsWindow() const {
return ::IsWindow(GetNativeView());
}
BOOL ShowWindow(int command) {
DCHECK(::IsWindow(GetNativeView()));
return ::ShowWindow(GetNativeView(), command);
}
HWND GetParent() const {
return ::GetParent(GetNativeView());
}
LONG GetWindowLong(int index) {
DCHECK(::IsWindow(GetNativeView()));
return ::GetWindowLong(GetNativeView(), index);
}
BOOL GetWindowRect(RECT* rect) const {
return ::GetWindowRect(GetNativeView(), rect);
}
LONG SetWindowLong(int index, LONG new_long) {
DCHECK(::IsWindow(GetNativeView()));
return ::SetWindowLong(GetNativeView(), index, new_long);
}
BOOL SetWindowPos(HWND hwnd_after, int x, int y, int cx, int cy, UINT flags) {
DCHECK(::IsWindow(GetNativeView()));
return ::SetWindowPos(GetNativeView(), hwnd_after, x, y, cx, cy, flags);
}
BOOL IsZoomed() const {
DCHECK(::IsWindow(GetNativeView()));
return ::IsZoomed(GetNativeView());
}
BOOL MoveWindow(int x, int y, int width, int height) {
return MoveWindow(x, y, width, height, TRUE);
}
BOOL MoveWindow(int x, int y, int width, int height, BOOL repaint) {
DCHECK(::IsWindow(GetNativeView()));
return ::MoveWindow(GetNativeView(), x, y, width, height, repaint);
}
int SetWindowRgn(HRGN region, BOOL redraw) {
DCHECK(::IsWindow(GetNativeView()));
return ::SetWindowRgn(GetNativeView(), region, redraw);
}
BOOL GetClientRect(RECT* rect) const {
DCHECK(::IsWindow(GetNativeView()));
return ::GetClientRect(GetNativeView(), rect);
}
// Overridden from internal::NativeWidgetPrivate:
virtual void InitNativeWidget(const Widget::InitParams& params) OVERRIDE;
virtual NonClientFrameView* CreateNonClientFrameView() OVERRIDE;
virtual void UpdateFrameAfterFrameChange() OVERRIDE;
virtual bool ShouldUseNativeFrame() const OVERRIDE;
virtual void FrameTypeChanged() OVERRIDE;
virtual Widget* GetWidget() OVERRIDE;
virtual const Widget* GetWidget() const OVERRIDE;
virtual gfx::NativeView GetNativeView() const OVERRIDE;
virtual gfx::NativeWindow GetNativeWindow() const OVERRIDE;
virtual Widget* GetTopLevelWidget() OVERRIDE;
virtual const ui::Compositor* GetCompositor() const OVERRIDE;
virtual ui::Compositor* GetCompositor() OVERRIDE;
virtual void CalculateOffsetToAncestorWithLayer(
gfx::Point* offset,
ui::Layer** layer_parent) OVERRIDE;
virtual void ViewRemoved(View* view) OVERRIDE;
virtual void SetNativeWindowProperty(const char* name, void* value) OVERRIDE;
virtual void* GetNativeWindowProperty(const char* name) const OVERRIDE;
virtual TooltipManager* GetTooltipManager() const OVERRIDE;
virtual bool IsScreenReaderActive() const OVERRIDE;
virtual void SendNativeAccessibilityEvent(
View* view,
ui::AccessibilityTypes::Event event_type) OVERRIDE;
// NativeWidgetWin ignores touch captures.
virtual void SetCapture(unsigned int flags) OVERRIDE;
virtual void ReleaseCapture() OVERRIDE;
virtual bool HasCapture(unsigned int flags) const OVERRIDE;
virtual InputMethod* CreateInputMethod() OVERRIDE;
virtual void CenterWindow(const gfx::Size& size) OVERRIDE;
virtual void GetWindowPlacement(
gfx::Rect* bounds,
ui::WindowShowState* show_state) const OVERRIDE;
virtual void SetWindowTitle(const string16& title) OVERRIDE;
virtual void SetWindowIcons(const SkBitmap& window_icon,
const SkBitmap& app_icon) OVERRIDE;
virtual void SetAccessibleName(const string16& name) OVERRIDE;
virtual void SetAccessibleRole(ui::AccessibilityTypes::Role role) OVERRIDE;
virtual void SetAccessibleState(ui::AccessibilityTypes::State state) OVERRIDE;
virtual void InitModalType(ui::ModalType modal_type) OVERRIDE;
virtual gfx::Rect GetWindowScreenBounds() const OVERRIDE;
virtual gfx::Rect GetClientAreaScreenBounds() const OVERRIDE;
virtual gfx::Rect GetRestoredBounds() const OVERRIDE;
virtual void SetBounds(const gfx::Rect& bounds) OVERRIDE;
virtual void SetSize(const gfx::Size& size) OVERRIDE;
virtual void StackAbove(gfx::NativeView native_view) OVERRIDE;
virtual void StackAtTop() OVERRIDE;
virtual void StackBelow(gfx::NativeView native_view) OVERRIDE;
virtual void SetShape(gfx::NativeRegion shape) OVERRIDE;
virtual void Close() OVERRIDE;
virtual void CloseNow() OVERRIDE;
virtual void Show() OVERRIDE;
virtual void Hide() OVERRIDE;
virtual void ShowMaximizedWithBounds(
const gfx::Rect& restored_bounds) OVERRIDE;
virtual void ShowWithWindowState(ui::WindowShowState show_state) OVERRIDE;
virtual bool IsVisible() const OVERRIDE;
virtual void Activate() OVERRIDE;
virtual void Deactivate() OVERRIDE;
virtual bool IsActive() const OVERRIDE;
virtual void SetAlwaysOnTop(bool always_on_top) OVERRIDE;
virtual void Maximize() OVERRIDE;
virtual void Minimize() OVERRIDE;
virtual bool IsMaximized() const OVERRIDE;
virtual bool IsMinimized() const OVERRIDE;
virtual void Restore() OVERRIDE;
virtual void SetFullscreen(bool fullscreen) OVERRIDE;
virtual bool IsFullscreen() const OVERRIDE;
virtual void SetOpacity(unsigned char opacity) OVERRIDE;
virtual void SetUseDragFrame(bool use_drag_frame) OVERRIDE;
virtual void FlashFrame(bool flash) OVERRIDE;
virtual bool IsAccessibleWidget() const OVERRIDE;
virtual void RunShellDrag(View* view,
const ui::OSExchangeData& data,
const gfx::Point& location,
int operation) OVERRIDE;
virtual void SchedulePaintInRect(const gfx::Rect& rect) OVERRIDE;
virtual void SetCursor(gfx::NativeCursor cursor) OVERRIDE;
virtual void ClearNativeFocus() OVERRIDE;
virtual void FocusNativeView(gfx::NativeView native_view) OVERRIDE;
virtual gfx::Rect GetWorkAreaBoundsInScreen() const OVERRIDE;
virtual void SetInactiveRenderingDisabled(bool value) OVERRIDE;
virtual Widget::MoveLoopResult RunMoveLoop() OVERRIDE;
virtual void EndMoveLoop() OVERRIDE;
virtual void SetVisibilityChangedAnimationsEnabled(bool value) OVERRIDE;
protected:
// Information saved before going into fullscreen mode, used to restore the
// window afterwards.
struct SavedWindowInfo {
bool maximized;
LONG style;
LONG ex_style;
RECT window_rect;
};
// Overridden from MessageLoop::Observer:
virtual base::EventStatus WillProcessEvent(
const base::NativeEvent& event) OVERRIDE;
virtual void DidProcessEvent(const base::NativeEvent& event) OVERRIDE;
// Overridden from WindowImpl:
virtual HICON GetDefaultWindowIcon() const OVERRIDE;
virtual LRESULT OnWndProc(UINT message,
WPARAM w_param,
LPARAM l_param) OVERRIDE;
// Message Handlers ----------------------------------------------------------
BEGIN_MSG_MAP_EX(NativeWidgetWin)
// Range handlers must go first!
MESSAGE_RANGE_HANDLER_EX(WM_MOUSEFIRST, WM_MOUSELAST, OnMouseRange)
MESSAGE_RANGE_HANDLER_EX(WM_NCMOUSEMOVE, WM_NCXBUTTONDBLCLK, OnMouseRange)
// Reflected message handler
MESSAGE_HANDLER_EX(base::win::kReflectedMessage, OnReflectedMessage)
// CustomFrameWindow hacks
MESSAGE_HANDLER_EX(WM_NCUAHDRAWCAPTION, OnNCUAHDrawCaption)
MESSAGE_HANDLER_EX(WM_NCUAHDRAWFRAME, OnNCUAHDrawFrame)
// Vista and newer
MESSAGE_HANDLER_EX(WM_DWMCOMPOSITIONCHANGED, OnDwmCompositionChanged)
// Non-atlcrack.h handlers
MESSAGE_HANDLER_EX(WM_GETOBJECT, OnGetObject)
// Mouse events.
MESSAGE_HANDLER_EX(WM_MOUSEACTIVATE, OnMouseActivate)
MESSAGE_HANDLER_EX(WM_MOUSELEAVE, OnMouseRange)
MESSAGE_HANDLER_EX(WM_NCMOUSELEAVE, OnMouseRange)
MESSAGE_HANDLER_EX(WM_SETCURSOR, OnSetCursor);
// Key events.
MESSAGE_HANDLER_EX(WM_KEYDOWN, OnKeyEvent)
MESSAGE_HANDLER_EX(WM_KEYUP, OnKeyEvent)
MESSAGE_HANDLER_EX(WM_SYSKEYDOWN, OnKeyEvent)
MESSAGE_HANDLER_EX(WM_SYSKEYUP, OnKeyEvent)
// IME Events.
MESSAGE_HANDLER_EX(WM_IME_SETCONTEXT, OnImeMessages)
MESSAGE_HANDLER_EX(WM_IME_STARTCOMPOSITION, OnImeMessages)
MESSAGE_HANDLER_EX(WM_IME_COMPOSITION, OnImeMessages)
MESSAGE_HANDLER_EX(WM_IME_ENDCOMPOSITION, OnImeMessages)
MESSAGE_HANDLER_EX(WM_IME_REQUEST, OnImeMessages)
MESSAGE_HANDLER_EX(WM_CHAR, OnImeMessages)
MESSAGE_HANDLER_EX(WM_SYSCHAR, OnImeMessages)
MESSAGE_HANDLER_EX(WM_DEADCHAR, OnImeMessages)
MESSAGE_HANDLER_EX(WM_SYSDEADCHAR, OnImeMessages)
// This list is in _ALPHABETICAL_ order! OR I WILL HURT YOU.
MSG_WM_ACTIVATE(OnActivate)
MSG_WM_ACTIVATEAPP(OnActivateApp)
MSG_WM_APPCOMMAND(OnAppCommand)
MSG_WM_CANCELMODE(OnCancelMode)
MSG_WM_CAPTURECHANGED(OnCaptureChanged)
MSG_WM_CLOSE(OnClose)
MSG_WM_COMMAND(OnCommand)
MSG_WM_CREATE(OnCreate)
MSG_WM_DESTROY(OnDestroy)
MSG_WM_DISPLAYCHANGE(OnDisplayChange)
MSG_WM_ERASEBKGND(OnEraseBkgnd)
MSG_WM_ENDSESSION(OnEndSession)
MSG_WM_ENTERSIZEMOVE(OnEnterSizeMove)
MSG_WM_EXITMENULOOP(OnExitMenuLoop)
MSG_WM_EXITSIZEMOVE(OnExitSizeMove)
MSG_WM_GETMINMAXINFO(OnGetMinMaxInfo)
MSG_WM_HSCROLL(OnHScroll)
MSG_WM_INITMENU(OnInitMenu)
MSG_WM_INITMENUPOPUP(OnInitMenuPopup)
MSG_WM_INPUTLANGCHANGE(OnInputLangChange)
MSG_WM_KILLFOCUS(OnKillFocus)
MSG_WM_MOVE(OnMove)
MSG_WM_MOVING(OnMoving)
MSG_WM_NCACTIVATE(OnNCActivate)
MSG_WM_NCCALCSIZE(OnNCCalcSize)
MSG_WM_NCHITTEST(OnNCHitTest)
MSG_WM_NCPAINT(OnNCPaint)
MSG_WM_NOTIFY(OnNotify)
MSG_WM_PAINT(OnPaint)
MSG_WM_POWERBROADCAST(OnPowerBroadcast)
MSG_WM_SETFOCUS(OnSetFocus)
MSG_WM_SETTEXT(OnSetText)
MSG_WM_SETTINGCHANGE(OnSettingChange)
MSG_WM_SIZE(OnSize)
MSG_WM_SYSCOMMAND(OnSysCommand)
MSG_WM_THEMECHANGED(OnThemeChanged)
MSG_WM_VSCROLL(OnVScroll)
MSG_WM_WINDOWPOSCHANGING(OnWindowPosChanging)
MSG_WM_WINDOWPOSCHANGED(OnWindowPosChanged)
END_MSG_MAP()
// These are all virtual so that specialized Widgets can modify or augment
// processing.
// This list is in _ALPHABETICAL_ order!
// Note: in the base class these functions must do nothing but convert point
// coordinates to client coordinates (if necessary) and forward the
// handling to the appropriate Process* function. This is so that
// subclasses can easily override these methods to do different things
// and have a convenient function to call to get the default behavior.
virtual void OnActivate(UINT action, BOOL minimized, HWND window);
virtual void OnActivateApp(BOOL active, DWORD thread_id);
virtual LRESULT OnAppCommand(HWND window, short app_command, WORD device,
int keystate);
virtual void OnCancelMode();
virtual void OnCaptureChanged(HWND hwnd);
virtual void OnClose();
virtual void OnCommand(UINT notification_code, int command_id, HWND window);
virtual LRESULT OnCreate(CREATESTRUCT* create_struct);
// WARNING: If you override this be sure and invoke super, otherwise we'll
// leak a few things.
virtual void OnDestroy();
virtual void OnDisplayChange(UINT bits_per_pixel, CSize screen_size);
virtual LRESULT OnDwmCompositionChanged(UINT msg,
WPARAM w_param,
LPARAM l_param);
virtual void OnEndSession(BOOL ending, UINT logoff);
virtual void OnEnterSizeMove();
virtual LRESULT OnEraseBkgnd(HDC dc);
virtual void OnExitMenuLoop(BOOL is_track_popup_menu);
virtual void OnExitSizeMove();
virtual LRESULT OnGetObject(UINT uMsg, WPARAM w_param, LPARAM l_param);
virtual void OnGetMinMaxInfo(MINMAXINFO* minmax_info);
virtual void OnHScroll(int scroll_type, short position, HWND scrollbar);
virtual LRESULT OnImeMessages(UINT message, WPARAM w_param, LPARAM l_param);
virtual void OnInitMenu(HMENU menu);
virtual void OnInitMenuPopup(HMENU menu, UINT position, BOOL is_system_menu);
virtual void OnInputLangChange(DWORD character_set, HKL input_language_id);
virtual LRESULT OnKeyEvent(UINT message, WPARAM w_param, LPARAM l_param);
virtual void OnKillFocus(HWND focused_window);
virtual LRESULT OnMouseActivate(UINT message, WPARAM w_param, LPARAM l_param);
virtual LRESULT OnMouseRange(UINT message, WPARAM w_param, LPARAM l_param);
virtual void OnMove(const CPoint& point);
virtual void OnMoving(UINT param, LPRECT new_bounds);
virtual LRESULT OnNCActivate(BOOL active);
virtual LRESULT OnNCCalcSize(BOOL w_param, LPARAM l_param);
virtual LRESULT OnNCHitTest(const CPoint& pt);
virtual void OnNCPaint(HRGN rgn);
virtual LRESULT OnNCUAHDrawCaption(UINT msg,
WPARAM w_param,
LPARAM l_param);
virtual LRESULT OnNCUAHDrawFrame(UINT msg, WPARAM w_param, LPARAM l_param);
virtual LRESULT OnNotify(int w_param, NMHDR* l_param);
virtual void OnPaint(HDC dc);
virtual LRESULT OnPowerBroadcast(DWORD power_event, DWORD data);
virtual LRESULT OnReflectedMessage(UINT msg, WPARAM w_param, LPARAM l_param);
virtual LRESULT OnSetCursor(UINT message, WPARAM w_param, LPARAM l_param);
virtual void OnSetFocus(HWND focused_window);
virtual LRESULT OnSetText(const wchar_t* text);
virtual void OnSettingChange(UINT flags, const wchar_t* section);
virtual void OnSize(UINT param, const CSize& size);
virtual void OnSysCommand(UINT notification_code, CPoint click);
virtual void OnThemeChanged();
virtual void OnVScroll(int scroll_type, short position, HWND scrollbar);
virtual void OnWindowPosChanging(WINDOWPOS* window_pos);
virtual void OnWindowPosChanged(WINDOWPOS* window_pos);
// Deletes this window as it is destroyed, override to provide different
// behavior.
virtual void OnFinalMessage(HWND window);
// Retrieve the show state of the window. This is one of the SW_SHOW* flags
// passed into Windows' ShowWindow method. For normal windows this defaults
// to SW_SHOWNORMAL, however windows (e.g. the main window) can override this
// method to provide different values (e.g. retrieve the user's specified
// show state from the shortcut starutp info).
virtual int GetShowState() const;
// Returns the insets of the client area relative to the non-client area of
// the window. Override this function instead of OnNCCalcSize, which is
// crazily complicated.
virtual gfx::Insets GetClientAreaInsets() const;
// Start tracking all mouse events so that this window gets sent mouse leave
// messages too.
void TrackMouseEvents(DWORD mouse_tracking_flags);
// Called when a MSAA screen reader client is detected.
virtual void OnScreenReaderDetected();
// Executes the specified SC_command.
void ExecuteSystemMenuCommand(int command);
// The TooltipManager. This is NULL if there is a problem creating the
// underlying tooltip window.
// WARNING: RootView's destructor calls into the TooltipManager. As such, this
// must be destroyed AFTER root_view_.
scoped_ptr<TooltipManagerWin> tooltip_manager_;
scoped_refptr<DropTargetWin> drop_target_;
const gfx::Rect& invalid_rect() const { return invalid_rect_; }
// Saved window information from before entering fullscreen mode.
// TODO(beng): move to private once GetRestoredBounds() moves onto Widget.
SavedWindowInfo saved_window_info_;
private:
typedef ScopedVector<ui::ViewProp> ViewProps;
// Called after the WM_ACTIVATE message has been processed by the default
// windows procedure.
static void PostProcessActivateMessage(NativeWidgetWin* widget,
int activation_state);
void SetInitParams(const Widget::InitParams& params);
// Synchronously paints the invalid contents of the Widget.
void RedrawInvalidRect();
// Synchronously updates the invalid contents of the Widget. Valid for
// layered windows only.
void RedrawLayeredWindowContents();
// Lock or unlock the window from being able to redraw itself in response to
// updates to its invalid region.
class ScopedRedrawLock;
void LockUpdates(bool force);
void UnlockUpdates(bool force);
// Determines whether the delegate expects the client size or the window size.
bool WidgetSizeIsClientSize() const;
// Responds to the client area changing size, either at window creation time
// or subsequently.
void ClientAreaSizeChanged();
// Resets the window region for the current widget bounds if necessary.
// If |force| is true, the window region is reset to NULL even for native
// frame windows.
void ResetWindowRegion(bool force);
// When removing the standard frame, tells the DWM how much glass we want on
// the edges. Currently hardcoded to 10px on all sides.
void UpdateDWMFrame();
// Calls DefWindowProc, safely wrapping the call in a ScopedRedrawLock to
// prevent frame flicker. DefWindowProc handling can otherwise render the
// classic-look window title bar directly.
LRESULT DefWindowProcWithRedrawLock(UINT message,
WPARAM w_param,
LPARAM l_param);
// Stops ignoring SetWindowPos() requests (see below).
void StopIgnoringPosChanges() { ignore_window_pos_changes_ = false; }
void RestoreEnabledIfNecessary();
void SetInitialFocus();
// Overridden from internal::InputMethodDelegate
virtual void DispatchKeyEventPostIME(const KeyEvent& key) OVERRIDE;
// A delegate implementation that handles events received here.
// See class documentation for Widget in widget.h for a note about ownership.
internal::NativeWidgetDelegate* delegate_;
// The following factory is used for calls to close the NativeWidgetWin
// instance.
base::WeakPtrFactory<NativeWidgetWin> close_widget_factory_;
// The flags currently being used with TrackMouseEvent to track mouse
// messages. 0 if there is no active tracking. The value of this member is
// used when tracking is canceled.
DWORD active_mouse_tracking_flags_;
// Should we keep an off-screen buffer? This is false by default, set to true
// when WS_EX_LAYERED is specified before the native window is created.
//
// NOTE: this is intended to be used with a layered window (a window with an
// extended window style of WS_EX_LAYERED). If you are using a layered window
// and NOT changing the layered alpha or anything else, then leave this value
// alone. OTOH if you are invoking SetLayeredWindowAttributes then you'll
// most likely want to set this to false, or after changing the alpha toggle
// the extended style bit to false than back to true. See MSDN for more
// details.
bool use_layered_buffer_;
// The default alpha to be applied to the layered window.
BYTE layered_alpha_;
// A canvas that contains the window contents in the case of a layered
// window.
scoped_ptr<gfx::Canvas> layered_window_contents_;
// We must track the invalid rect ourselves, for two reasons:
// For layered windows, Windows will not do this properly with
// InvalidateRect()/GetUpdateRect(). (In fact, it'll return misleading
// information from GetUpdateRect()).
// We also need to keep track of the invalid rectangle for the RootView should
// we need to paint the non-client area. The data supplied to WM_NCPAINT seems
// to be insufficient.
gfx::Rect invalid_rect_;
// A factory that allows us to schedule a redraw for layered windows.
base::WeakPtrFactory<NativeWidgetWin> paint_layered_window_factory_;
// See class documentation for Widget in widget.h for a note about ownership.
Widget::InitParams::Ownership ownership_;
// True if we are allowed to update the layered window from the DIB backing
// store if necessary.
bool can_update_layered_window_;
// Whether the focus should be restored next time we get enabled. Needed to
// restore focus correctly when Windows modal dialogs are displayed.
bool restore_focus_when_enabled_;
// Instance of accessibility information and handling for MSAA root
base::win::ScopedComPtr<IAccessible> accessibility_root_;
// Value determines whether the Widget is customized for accessibility.
static bool screen_reader_active_;
// The maximum number of view events in our vector below.
static const int kMaxAccessibilityViewEvents = 20;
// A vector used to access views for which we have sent notifications to
// accessibility clients. It is used as a circular queue.
std::vector<View*> accessibility_view_events_;
// The current position of the view events vector. When incrementing,
// we always mod this value with the max view events above .
int accessibility_view_events_index_;
// The last cursor that was active before the current one was selected. Saved
// so that we can restore it.
gfx::NativeCursor previous_cursor_;
ViewProps props_;
// True if we're in fullscreen mode.
bool fullscreen_;
// If this is greater than zero, we should prevent attempts to make the window
// visible when we handle WM_WINDOWPOSCHANGING. Some calls like
// ShowWindow(SW_RESTORE) make the window visible in addition to restoring it,
// when all we want to do is restore it.
int force_hidden_count_;
// The window styles before we modified them for the drag frame appearance.
DWORD drag_frame_saved_window_style_;
DWORD drag_frame_saved_window_ex_style_;
// Represents the number of ScopedRedrawLocks active against this widget.
// If this is greater than zero, the widget should be locked against updates.
int lock_updates_count_;
// When true, this flag makes us discard incoming SetWindowPos() requests that
// only change our position/size. (We still allow changes to Z-order,
// activation, etc.)
bool ignore_window_pos_changes_;
// The following factory is used to ignore SetWindowPos() calls for short time
// periods.
base::WeakPtrFactory<NativeWidgetWin> ignore_pos_changes_factory_;
// The last-seen monitor containing us, and its rect and work area. These are
// used to catch updates to the rect and work area and react accordingly.
HMONITOR last_monitor_;
gfx::Rect last_monitor_rect_, last_work_area_;
// Set to true when the user presses the right mouse button on the caption
// area. We need this so we can correctly show the context menu on mouse-up.
bool is_right_mouse_pressed_on_caption_;
// Whether all ancestors have been enabled. This is only used if is_modal_ is
// true.
bool restored_enabled_;
// This flag can be initialized and checked after certain operations (such as
// DefWindowProc) to avoid stack-controlled NativeWidgetWin operations (such
// as unlocking the Window with a ScopedRedrawLock) after Widget destruction.
bool* destroyed_;
// True if the widget is going to have a non_client_view. We cache this value
// rather than asking the Widget for the non_client_view so that we know at
// Init time, before the Widget has created the NonClientView.
bool has_non_client_view_;
bool remove_standard_frame_;
DISALLOW_COPY_AND_ASSIGN(NativeWidgetWin);
};
} // namespace views
#endif // UI_VIEWS_WIDGET_NATIVE_WIDGET_WIN_H_