/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ #ifndef Window_h__ #define Window_h__ /* * nsWindow - Native window management and event handling. */ #include "mozilla/RefPtr.h" #include "nsBaseWidget.h" #include "nsWindowBase.h" #include "nsdefs.h" #include "nsIdleService.h" #include "nsToolkit.h" #include "nsString.h" #include "nsTArray.h" #include "gfxWindowsPlatform.h" #include "gfxWindowsSurface.h" #include "nsWindowDbg.h" #include "cairo.h" #include "nsITimer.h" #include "nsRegion.h" #include "mozilla/EventForwards.h" #include "mozilla/MouseEvents.h" #include "mozilla/TimeStamp.h" #include "nsMargin.h" #include "nsRegionFwd.h" #include "nsWinGesture.h" #include "WinUtils.h" #include "WindowHook.h" #include "TaskbarWindowPreview.h" #ifdef ACCESSIBILITY #include "oleacc.h" #include "mozilla/a11y/Accessible.h" #endif #include "nsUXThemeData.h" #include "nsIDOMMouseEvent.h" #include "nsIIdleServiceInternal.h" #include "IMMHandler.h" /** * Forward class definitions */ class nsNativeDragTarget; class nsIRollupListener; class imgIContainer; namespace mozilla { namespace widget { class NativeKey; class WinCompositorWidget; struct MSGResult; } // namespace widget } // namespacw mozilla; /** * Native WIN32 window wrapper. */ class nsWindow : public nsWindowBase { typedef mozilla::TimeStamp TimeStamp; typedef mozilla::TimeDuration TimeDuration; typedef mozilla::widget::WindowHook WindowHook; typedef mozilla::widget::TaskbarWindowPreview TaskbarWindowPreview; typedef mozilla::widget::NativeKey NativeKey; typedef mozilla::widget::MSGResult MSGResult; typedef mozilla::widget::IMEContext IMEContext; public: nsWindow(); NS_DECL_ISUPPORTS_INHERITED friend class nsWindowGfx; // nsWindowBase virtual void InitEvent(mozilla::WidgetGUIEvent& aEvent, LayoutDeviceIntPoint* aPoint = nullptr) override; virtual WidgetEventTime CurrentMessageWidgetEventTime() const override; virtual bool DispatchWindowEvent(mozilla::WidgetGUIEvent* aEvent) override; virtual bool DispatchKeyboardEvent(mozilla::WidgetKeyboardEvent* aEvent) override; virtual bool DispatchWheelEvent(mozilla::WidgetWheelEvent* aEvent) override; virtual bool DispatchContentCommandEvent(mozilla::WidgetContentCommandEvent* aEvent) override; virtual nsWindowBase* GetParentWindowBase(bool aIncludeOwner) override; virtual bool IsTopLevelWidget() override { return mIsTopWidgetWindow; } using nsWindowBase::DispatchPluginEvent; // nsIWidget interface using nsWindowBase::Create; // for Create signature not overridden here virtual MOZ_MUST_USE nsresult Create(nsIWidget* aParent, nsNativeWidget aNativeParent, const LayoutDeviceIntRect& aRect, nsWidgetInitData* aInitData = nullptr) override; NS_IMETHOD Destroy() override; NS_IMETHOD SetParent(nsIWidget *aNewParent) override; virtual nsIWidget* GetParent(void) override; virtual float GetDPI() override; double GetDefaultScaleInternal() final; int32_t LogToPhys(double aValue) final; mozilla::DesktopToLayoutDeviceScale GetDesktopToDeviceScale() final { if (mozilla::widget::WinUtils::IsPerMonitorDPIAware()) { return mozilla::DesktopToLayoutDeviceScale(1.0); } else { return mozilla::DesktopToLayoutDeviceScale(GetDefaultScaleInternal()); } } NS_IMETHOD Show(bool bState) override; virtual bool IsVisible() const override; NS_IMETHOD ConstrainPosition(bool aAllowSlop, int32_t *aX, int32_t *aY) override; virtual void SetSizeConstraints(const SizeConstraints& aConstraints) override; virtual const SizeConstraints GetSizeConstraints() override; NS_IMETHOD Move(double aX, double aY) override; NS_IMETHOD Resize(double aWidth, double aHeight, bool aRepaint) override; NS_IMETHOD Resize(double aX, double aY, double aWidth, double aHeight, bool aRepaint) override; NS_IMETHOD BeginResizeDrag(mozilla::WidgetGUIEvent* aEvent, int32_t aHorizontal, int32_t aVertical) override; NS_IMETHOD PlaceBehind(nsTopLevelWidgetZPlacement aPlacement, nsIWidget *aWidget, bool aActivate) override; NS_IMETHOD SetSizeMode(nsSizeMode aMode) override; NS_IMETHOD Enable(bool aState) override; virtual bool IsEnabled() const override; NS_IMETHOD SetFocus(bool aRaise) override; virtual LayoutDeviceIntRect GetBounds() override; virtual LayoutDeviceIntRect GetScreenBounds() override; virtual MOZ_MUST_USE nsresult GetRestoredBounds(LayoutDeviceIntRect& aRect) override; virtual LayoutDeviceIntRect GetClientBounds() override; virtual LayoutDeviceIntPoint GetClientOffset() override; void SetBackgroundColor(const nscolor& aColor) override; NS_IMETHOD SetCursor(imgIContainer* aCursor, uint32_t aHotspotX, uint32_t aHotspotY) override; NS_IMETHOD SetCursor(nsCursor aCursor) override; virtual nsresult ConfigureChildren(const nsTArray& aConfigurations) override; virtual bool PrepareForFullscreenTransition(nsISupports** aData) override; virtual void PerformFullscreenTransition(FullscreenTransitionStage aStage, uint16_t aDuration, nsISupports* aData, nsIRunnable* aCallback) override; virtual nsresult MakeFullScreen(bool aFullScreen, nsIScreen* aScreen = nullptr) override; NS_IMETHOD HideWindowChrome(bool aShouldHide) override; NS_IMETHOD Invalidate(bool aEraseBackground = false, bool aUpdateNCArea = false, bool aIncludeChildren = false); NS_IMETHOD Invalidate(const LayoutDeviceIntRect& aRect); virtual void* GetNativeData(uint32_t aDataType) override; void SetNativeData(uint32_t aDataType, uintptr_t aVal) override; virtual void FreeNativeData(void * data, uint32_t aDataType) override; NS_IMETHOD SetTitle(const nsAString& aTitle) override; NS_IMETHOD SetIcon(const nsAString& aIconSpec) override; virtual LayoutDeviceIntPoint WidgetToScreenOffset() override; virtual LayoutDeviceIntSize ClientToWindowSize(const LayoutDeviceIntSize& aClientSize) override; NS_IMETHOD DispatchEvent(mozilla::WidgetGUIEvent* aEvent, nsEventStatus& aStatus) override; NS_IMETHOD EnableDragDrop(bool aEnable) override; NS_IMETHOD CaptureMouse(bool aCapture) override; NS_IMETHOD CaptureRollupEvents(nsIRollupListener * aListener, bool aDoCapture) override; NS_IMETHOD GetAttention(int32_t aCycleCount) override; virtual bool HasPendingInputEvent() override; virtual LayerManager* GetLayerManager(PLayerTransactionChild* aShadowManager = nullptr, LayersBackend aBackendHint = mozilla::layers::LayersBackend::LAYERS_NONE, LayerManagerPersistence aPersistence = LAYER_MANAGER_CURRENT) override; NS_IMETHOD OnDefaultButtonLoaded(const LayoutDeviceIntRect& aButtonRect) override; virtual nsresult SynthesizeNativeKeyEvent(int32_t aNativeKeyboardLayout, int32_t aNativeKeyCode, uint32_t aModifierFlags, const nsAString& aCharacters, const nsAString& aUnmodifiedCharacters, nsIObserver* aObserver) override; virtual nsresult SynthesizeNativeMouseEvent(LayoutDeviceIntPoint aPoint, uint32_t aNativeMessage, uint32_t aModifierFlags, nsIObserver* aObserver) override; virtual nsresult SynthesizeNativeMouseMove(LayoutDeviceIntPoint aPoint, nsIObserver* aObserver) override { return SynthesizeNativeMouseEvent(aPoint, MOUSEEVENTF_MOVE, 0, aObserver); } virtual nsresult SynthesizeNativeMouseScrollEvent(LayoutDeviceIntPoint aPoint, uint32_t aNativeMessage, double aDeltaX, double aDeltaY, double aDeltaZ, uint32_t aModifierFlags, uint32_t aAdditionalFlags, nsIObserver* aObserver) override; NS_IMETHOD_(void) SetInputContext(const InputContext& aContext, const InputContextAction& aAction) override; NS_IMETHOD_(InputContext) GetInputContext() override; NS_IMETHOD_(TextEventDispatcherListener*) GetNativeTextEventDispatcherListener() override; #ifdef MOZ_XUL virtual void SetTransparencyMode(nsTransparencyMode aMode) override; virtual nsTransparencyMode GetTransparencyMode() override; virtual void UpdateOpaqueRegion(const LayoutDeviceIntRegion& aOpaqueRegion) override; #endif // MOZ_XUL virtual nsIMEUpdatePreference GetIMEUpdatePreference() override; NS_IMETHOD SetNonClientMargins(LayoutDeviceIntMargin& aMargins) override; void SetDrawsInTitlebar(bool aState) override; virtual void UpdateWindowDraggingRegion(const LayoutDeviceIntRegion& aRegion) override; virtual void UpdateThemeGeometries(const nsTArray& aThemeGeometries) override; virtual uint32_t GetMaxTouchPoints() const override; /** * Event helpers */ virtual bool DispatchMouseEvent( mozilla::EventMessage aEventMessage, WPARAM wParam, LPARAM lParam, bool aIsContextMenuKey = false, int16_t aButton = mozilla::WidgetMouseEvent::eLeftButton, uint16_t aInputSource = nsIDOMMouseEvent::MOZ_SOURCE_MOUSE); virtual bool DispatchWindowEvent(mozilla::WidgetGUIEvent* aEvent, nsEventStatus& aStatus); void DispatchPendingEvents(); bool DispatchPluginEvent(UINT aMessage, WPARAM aWParam, LPARAM aLParam, bool aDispatchPendingEvents); void SuppressBlurEvents(bool aSuppress); // Called from nsFilePicker bool BlurEventsSuppressed(); #ifdef ACCESSIBILITY /** * Return an accessible associated with the window. */ mozilla::a11y::Accessible* GetAccessible(); #endif // ACCESSIBILITY /** * Window utilities */ nsWindow* GetTopLevelWindow(bool aStopOnDialogOrPopup); WNDPROC GetPrevWindowProc() { return mPrevWndProc; } WindowHook& GetWindowHook() { return mWindowHook; } nsWindow* GetParentWindow(bool aIncludeOwner); // Get an array of all nsWindow*s on the main thread. typedef void (WindowEnumCallback)(nsWindow*); static void EnumAllWindows(WindowEnumCallback aCallback); /** * Misc. */ virtual bool AutoErase(HDC dc); bool ComputeShouldAccelerate() override; void ForcePresent(); /** * AssociateDefaultIMC() associates or disassociates the default IMC for * the window. * * @param aAssociate TRUE, associates the default IMC with the window. * Otherwise, disassociates the default IMC from the * window. * @return TRUE if this method associated the default IMC with * disassociated window or disassociated the default IMC * from associated window. * Otherwise, i.e., if this method did nothing actually, * FALSE. */ bool AssociateDefaultIMC(bool aAssociate); bool HasTaskbarIconBeenCreated() { return mHasTaskbarIconBeenCreated; } // Called when either the nsWindow or an nsITaskbarTabPreview receives the noticiation that this window // has its icon placed on the taskbar. void SetHasTaskbarIconBeenCreated(bool created = true) { mHasTaskbarIconBeenCreated = created; } // Getter/setter for the nsITaskbarWindowPreview for this nsWindow already_AddRefed GetTaskbarPreview() { nsCOMPtr preview(do_QueryReferent(mTaskbarPreview)); return preview.forget(); } void SetTaskbarPreview(nsITaskbarWindowPreview *preview) { mTaskbarPreview = do_GetWeakReference(preview); } NS_IMETHOD ReparentNativeWidget(nsIWidget* aNewParent) override; // Open file picker tracking void PickerOpen(); void PickerClosed(); bool const DestroyCalled() { return mDestroyCalled; } bool IsPopup(); virtual bool ShouldUseOffMainThreadCompositing() override; const IMEContext& DefaultIMC() const { return mDefaultIMC; } virtual void SetCandidateWindowForPlugin( const mozilla::widget::CandidateWindowPosition& aPosition) override; virtual void DefaultProcOfPluginEvent( const mozilla::WidgetPluginEvent& aEvent) override; virtual nsresult OnWindowedPluginKeyEvent( const mozilla::NativeEventData& aKeyEventData, nsIKeyEventInPluginCallback* aCallback) override; void GetCompositorWidgetInitData(mozilla::widget::CompositorWidgetInitData* aInitData) override; protected: virtual ~nsWindow(); virtual void WindowUsesOMTC() override; virtual void RegisterTouchWindow() override; // A magic number to identify the FAKETRACKPOINTSCROLLABLE window created // when the trackpoint hack is enabled. enum { eFakeTrackPointScrollableID = 0x46545053 }; // Used for displayport suppression during window resize enum ResizeState { NOT_RESIZING, IN_SIZEMOVE, RESIZING, MOVING }; /** * Callbacks */ static LRESULT CALLBACK WindowProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam); static LRESULT CALLBACK WindowProcInternal(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam); static BOOL CALLBACK BroadcastMsgToChildren(HWND aWnd, LPARAM aMsg); static BOOL CALLBACK BroadcastMsg(HWND aTopWindow, LPARAM aMsg); static BOOL CALLBACK DispatchStarvedPaints(HWND aTopWindow, LPARAM aMsg); static BOOL CALLBACK RegisterTouchForDescendants(HWND aTopWindow, LPARAM aMsg); static BOOL CALLBACK UnregisterTouchForDescendants(HWND aTopWindow, LPARAM aMsg); static LRESULT CALLBACK MozSpecialMsgFilter(int code, WPARAM wParam, LPARAM lParam); static LRESULT CALLBACK MozSpecialWndProc(int code, WPARAM wParam, LPARAM lParam); static LRESULT CALLBACK MozSpecialMouseProc(int code, WPARAM wParam, LPARAM lParam); static VOID CALLBACK HookTimerForPopups( HWND hwnd, UINT uMsg, UINT idEvent, DWORD dwTime ); static BOOL CALLBACK ClearResourcesCallback(HWND aChild, LPARAM aParam); static BOOL CALLBACK EnumAllChildWindProc(HWND aWnd, LPARAM aParam); static BOOL CALLBACK EnumAllThreadWindowProc(HWND aWnd, LPARAM aParam); /** * Window utilities */ LPARAM lParamToScreen(LPARAM lParam); LPARAM lParamToClient(LPARAM lParam); virtual void SubclassWindow(BOOL bState); bool CanTakeFocus(); bool UpdateNonClientMargins(int32_t aSizeMode = -1, bool aReflowWindow = true); void UpdateGetWindowInfoCaptionStatus(bool aActiveCaption); void ResetLayout(); void InvalidateNonClientRegion(); HRGN ExcludeNonClientFromPaintRegion(HRGN aRegion); static const wchar_t* GetMainWindowClass(); bool HasGlass() const { return mTransparencyMode == eTransparencyGlass || mTransparencyMode == eTransparencyBorderlessGlass; } HWND GetOwnerWnd() const { return ::GetWindow(mWnd, GW_OWNER); } bool IsOwnerForegroundWindow() const { HWND owner = GetOwnerWnd(); return owner && owner == ::GetForegroundWindow(); } bool IsPopup() const { return mWindowType == eWindowType_popup; } /** * Event processing helpers */ void DispatchFocusToTopLevelWindow(bool aIsActivate); bool DispatchStandardEvent(mozilla::EventMessage aMsg); void RelayMouseEvent(UINT aMsg, WPARAM wParam, LPARAM lParam); virtual bool ProcessMessage(UINT msg, WPARAM &wParam, LPARAM &lParam, LRESULT *aRetValue); bool ExternalHandlerProcessMessage( UINT aMessage, WPARAM& aWParam, LPARAM& aLParam, MSGResult& aResult); bool ProcessMessageForPlugin(const MSG &aMsg, MSGResult& aResult); LRESULT ProcessCharMessage(const MSG &aMsg, bool *aEventDispatched); LRESULT ProcessKeyUpMessage(const MSG &aMsg, bool *aEventDispatched); LRESULT ProcessKeyDownMessage(const MSG &aMsg, bool *aEventDispatched); static bool EventIsInsideWindow(nsWindow* aWindow); // Convert nsEventStatus value to a windows boolean static bool ConvertStatus(nsEventStatus aStatus); static void PostSleepWakeNotification(const bool aIsSleepMode); int32_t ClientMarginHitTestPoint(int32_t mx, int32_t my); TimeStamp GetMessageTimeStamp(LONG aEventTime) const; static void UpdateFirstEventTime(DWORD aEventTime); void FinishLiveResizing(ResizeState aNewState); /** * Event handlers */ virtual void OnDestroy() override; virtual bool OnResize(nsIntRect &aWindowRect); bool OnGesture(WPARAM wParam, LPARAM lParam); bool OnTouch(WPARAM wParam, LPARAM lParam); bool OnHotKey(WPARAM wParam, LPARAM lParam); bool OnPaint(HDC aDC, uint32_t aNestingLevel); void OnWindowPosChanged(WINDOWPOS* wp); void OnWindowPosChanging(LPWINDOWPOS& info); void OnSysColorChanged(); void OnDPIChanged(int32_t x, int32_t y, int32_t width, int32_t height); /** * Function that registers when the user has been active (used for detecting * when the user is idle). */ void UserActivity(); int32_t GetHeight(int32_t aProposedHeight); const wchar_t* GetWindowClass() const; const wchar_t* GetWindowPopupClass() const; virtual DWORD WindowStyle(); DWORD WindowExStyle(); // This method registers the given window class, and returns the class name. const wchar_t* RegisterWindowClass(const wchar_t* aClassName, UINT aExtraStyle, LPWSTR aIconID) const; /** * XP and Vista theming support for windows with rounded edges */ void ClearThemeRegion(); void SetThemeRegion(); /** * Popup hooks */ static void ScheduleHookTimer(HWND aWnd, UINT aMsgId); static void RegisterSpecialDropdownHooks(); static void UnregisterSpecialDropdownHooks(); static bool GetPopupsToRollup(nsIRollupListener* aRollupListener, uint32_t* aPopupsToRollup); static bool NeedsToHandleNCActivateDelayed(HWND aWnd); static bool DealWithPopups(HWND inWnd, UINT inMsg, WPARAM inWParam, LPARAM inLParam, LRESULT* outResult); /** * Window transparency helpers */ #ifdef MOZ_XUL private: void SetWindowTranslucencyInner(nsTransparencyMode aMode); nsTransparencyMode GetWindowTranslucencyInner() const { return mTransparencyMode; } void UpdateGlass(); protected: #endif // MOZ_XUL static bool IsAsyncResponseEvent(UINT aMsg, LRESULT& aResult); void IPCWindowProcHandler(UINT& msg, WPARAM& wParam, LPARAM& lParam); /** * Misc. */ void StopFlashing(); static bool IsTopLevelMouseExit(HWND aWnd); virtual nsresult SetWindowClipRegion(const nsTArray& aRects, bool aIntersectWithExisting) override; nsIntRegion GetRegionToPaint(bool aForceFullRepaint, PAINTSTRUCT ps, HDC aDC); static void ActivateOtherWindowHelper(HWND aWnd); void ClearCachedResources(); nsIWidgetListener* GetPaintListener(); already_AddRefed CreateScrollSnapshot() override; struct ScrollSnapshot { RefPtr surface; bool surfaceHasSnapshot = false; RECT clip; }; ScrollSnapshot* EnsureSnapshotSurface(ScrollSnapshot& aSnapshotData, const mozilla::gfx::IntSize& aSize); ScrollSnapshot mFullSnapshot; ScrollSnapshot mPartialSnapshot; ScrollSnapshot* mCurrentSnapshot = nullptr; already_AddRefed GetFallbackScrollSnapshot(const RECT& aRequiredClip); protected: nsCOMPtr mParent; nsIntSize mLastSize; nsIntPoint mLastPoint; HWND mWnd; HWND mTransitionWnd; WNDPROC mPrevWndProc; HBRUSH mBrush; IMEContext mDefaultIMC; bool mIsTopWidgetWindow; bool mInDtor; bool mIsVisible; bool mUnicodeWidget; bool mPainting; bool mTouchWindow; bool mDisplayPanFeedback; bool mHideChrome; bool mIsRTL; bool mFullscreenMode; bool mMousePresent; bool mDestroyCalled; uint32_t mBlurSuppressLevel; DWORD_PTR mOldStyle; DWORD_PTR mOldExStyle; nsNativeDragTarget* mNativeDragTarget; HKL mLastKeyboardLayout; nsSizeMode mOldSizeMode; nsSizeMode mLastSizeMode; WindowHook mWindowHook; uint32_t mPickerDisplayCount; HICON mIconSmall; HICON mIconBig; static bool sDropShadowEnabled; static uint32_t sInstanceCount; static TriStateBool sCanQuit; static nsWindow* sCurrentWindow; static BOOL sIsOleInitialized; static HCURSOR sHCursor; static imgIContainer* sCursorImgContainer; static bool sSwitchKeyboardLayout; static bool sJustGotDeactivate; static bool sJustGotActivate; static bool sIsInMouseCapture; static int sTrimOnMinimize; // Always use the helper method to read this property. See bug 603793. static TriStateBool sHasBogusPopupsDropShadowOnMultiMonitor; static bool HasBogusPopupsDropShadowOnMultiMonitor(); // Non-client margin settings // Pre-calculated outward offset applied to default frames LayoutDeviceIntMargin mNonClientOffset; // Margins set by the owner LayoutDeviceIntMargin mNonClientMargins; // Margins we'd like to set once chrome is reshown: LayoutDeviceIntMargin mFutureMarginsOnceChromeShows; // Indicates we need to apply margins once toggling chrome into showing: bool mFutureMarginsToUse; // Indicates custom frames are enabled bool mCustomNonClient; // Cached copy of L&F's resize border int32_t mHorResizeMargin; int32_t mVertResizeMargin; // Height of the caption plus border int32_t mCaptionHeight; double mDefaultScale; nsCOMPtr mIdleService; // Draggable titlebar region maintained by UpdateWindowDraggingRegion LayoutDeviceIntRegion mDraggableRegion; // Hook Data Memebers for Dropdowns. sProcessHook Tells the // hook methods whether they should be processing the hook // messages. static HHOOK sMsgFilterHook; static HHOOK sCallProcHook; static HHOOK sCallMouseHook; static bool sProcessHook; static UINT sRollupMsgId; static HWND sRollupMsgWnd; static UINT sHookTimerId; // Mouse Clicks - static variable definitions for figuring // out 1 - 3 Clicks. static POINT sLastMousePoint; static POINT sLastMouseMovePoint; static LONG sLastMouseDownTime; static LONG sLastClickCount; static BYTE sLastMouseButton; // Graphics HDC mPaintDC; // only set during painting LayoutDeviceIntRect mLastPaintBounds; ResizeState mResizeState; // Transparency #ifdef MOZ_XUL nsTransparencyMode mTransparencyMode; nsIntRegion mPossiblyTransparentRegion; MARGINS mGlassMargins; #endif // MOZ_XUL // Win7 Gesture processing and management nsWinGesture mGesture; // Weak ref to the nsITaskbarWindowPreview associated with this window nsWeakPtr mTaskbarPreview; // True if the taskbar (possibly through the tab preview) tells us that the // icon has been created on the taskbar. bool mHasTaskbarIconBeenCreated; // Indicates that mouse events should be ignored and pass through to the // window below. This is currently only used for popups. bool mMouseTransparent; // Whether we're in the process of sending a WM_SETTEXT ourselves bool mSendingSetText; // The point in time at which the last paint completed. We use this to avoid // painting too rapidly in response to frequent input events. TimeStamp mLastPaintEndTime; // Caching for hit test results POINT mCachedHitTestPoint; TimeStamp mCachedHitTestTime; int32_t mCachedHitTestResult; RefPtr mBasicLayersSurface; static bool sNeedsToInitMouseWheelSettings; static void InitMouseWheelScrollData(); double mSizeConstraintsScale; // scale in effect when setting constraints }; /** * A child window is a window with different style. */ class ChildWindow : public nsWindow { public: ChildWindow() {} protected: virtual DWORD WindowStyle(); }; #endif // Window_h__