typedef struct uiWindowsSizing uiWindowsSizing;

typedef struct uiWindowsControl uiWindowsControl;
struct uiWindowsControl {
	uiControl c;
	uiControl *parent;
	// TODO this should be int on both os x and windows
	BOOL enabled;
	BOOL visible;
	void (*SyncEnableState)(uiWindowsControl *, int);
	void (*SetParentHWND)(uiWindowsControl *, HWND);
	void (*MinimumSize)(uiWindowsControl *, int *, int *);
	void (*MinimumSizeChanged)(uiWindowsControl *);
	void (*LayoutRect)(uiWindowsControl *c, RECT *r);
	void (*AssignControlIDZOrder)(uiWindowsControl *, LONG_PTR *, HWND *);
	void (*ChildVisibilityChanged)(uiWindowsControl *);
};
#define uiWindowsControl(this) ((uiWindowsControl *) (this))
// TODO document
uiprivExtern void uiWindowsControlSyncEnableState(uiWindowsControl *, int);
uiprivExtern void uiWindowsControlSetParentHWND(uiWindowsControl *, HWND);
uiprivExtern void uiWindowsControlMinimumSize(uiWindowsControl *, int *, int *);
uiprivExtern void uiWindowsControlMinimumSizeChanged(uiWindowsControl *);
uiprivExtern void uiWindowsControlLayoutRect(uiWindowsControl *, RECT *);
uiprivExtern void uiWindowsControlAssignControlIDZOrder(uiWindowsControl *, LONG_PTR *, HWND *);
uiprivExtern void uiWindowsControlChildVisibilityChanged(uiWindowsControl *);

// TODO document
#define uiWindowsControlDefaultDestroy(type) \
	static void type ## Destroy(uiControl *c) \
	{ \
		uiWindowsEnsureDestroyWindow(type(c)->hwnd); \
		uiFreeControl(c); \
	}
#define uiWindowsControlDefaultHandle(type) \
	static uintptr_t type ## Handle(uiControl *c) \
	{ \
		return (uintptr_t) (type(c)->hwnd); \
	}
#define uiWindowsControlDefaultParent(type) \
	static uiControl *type ## Parent(uiControl *c) \
	{ \
		return uiWindowsControl(c)->parent; \
	}
#define uiWindowsControlDefaultSetParent(type) \
	static void type ## SetParent(uiControl *c, uiControl *parent) \
	{ \
		uiControlVerifySetParent(c, parent); \
		uiWindowsControl(c)->parent = parent; \
	}
#define uiWindowsControlDefaultToplevel(type) \
	static int type ## Toplevel(uiControl *c) \
	{ \
		return 0; \
	}
#define uiWindowsControlDefaultVisible(type) \
	static int type ## Visible(uiControl *c) \
	{ \
		return uiWindowsControl(c)->visible; \
	}
#define uiWindowsControlDefaultShow(type) \
	static void type ## Show(uiControl *c) \
	{ \
		uiWindowsControl(c)->visible = 1; \
		ShowWindow(type(c)->hwnd, SW_SHOW); \
		uiWindowsControlNotifyVisibilityChanged(uiWindowsControl(c)); \
	}
#define uiWindowsControlDefaultHide(type) \
	static void type ## Hide(uiControl *c) \
	{ \
		uiWindowsControl(c)->visible = 0; \
		ShowWindow(type(c)->hwnd, SW_HIDE); \
		uiWindowsControlNotifyVisibilityChanged(uiWindowsControl(c)); \
	}
#define uiWindowsControlDefaultEnabled(type) \
	static int type ## Enabled(uiControl *c) \
	{ \
		return uiWindowsControl(c)->enabled; \
	}
#define uiWindowsControlDefaultEnable(type) \
	static void type ## Enable(uiControl *c) \
	{ \
		uiWindowsControl(c)->enabled = 1; \
		uiWindowsControlSyncEnableState(uiWindowsControl(c), uiControlEnabledToUser(c)); \
	}
#define uiWindowsControlDefaultDisable(type) \
	static void type ## Disable(uiControl *c) \
	{ \
		uiWindowsControl(c)->enabled = 0; \
		uiWindowsControlSyncEnableState(uiWindowsControl(c), uiControlEnabledToUser(c)); \
	}
#define uiWindowsControlDefaultSyncEnableState(type) \
	static void type ## SyncEnableState(uiWindowsControl *c, int enabled) \
	{ \
		if (uiWindowsShouldStopSyncEnableState(c, enabled)) \
			return; \
		EnableWindow(type(c)->hwnd, enabled); \
	}
#define uiWindowsControlDefaultSetParentHWND(type) \
	static void type ## SetParentHWND(uiWindowsControl *c, HWND parent) \
	{ \
		uiWindowsEnsureSetParentHWND(type(c)->hwnd, parent); \
	}
// note that there is no uiWindowsControlDefaultMinimumSize(); you MUST define this yourself!
#define uiWindowsControlDefaultMinimumSizeChanged(type) \
	static void type ## MinimumSizeChanged(uiWindowsControl *c) \
	{ \
		if (uiWindowsControlTooSmall(c)) { \
			uiWindowsControlContinueMinimumSizeChanged(c); \
			return; \
		} \
		/* otherwise do nothing; we have no children */ \
	}
#define uiWindowsControlDefaultLayoutRect(type) \
	static void type ## LayoutRect(uiWindowsControl *c, RECT *r) \
	{ \
		/* use the window rect as we include the non-client area in the sizes */ \
		uiWindowsEnsureGetWindowRect(type(c)->hwnd, r); \
	}
#define uiWindowsControlDefaultAssignControlIDZOrder(type) \
	static void type ## AssignControlIDZOrder(uiWindowsControl *c, LONG_PTR *controlID, HWND *insertAfter) \
	{ \
		uiWindowsEnsureAssignControlIDZOrder(type(c)->hwnd, controlID, insertAfter); \
	}
#define uiWindowsControlDefaultChildVisibilityChanged(type) \
	static void type ## ChildVisibilityChanged(uiWindowsControl *c) \
	{ \
		/* do nothing */ \
	}

#define uiWindowsControlAllDefaultsExceptDestroy(type) \
	uiWindowsControlDefaultHandle(type) \
	uiWindowsControlDefaultParent(type) \
	uiWindowsControlDefaultSetParent(type) \
	uiWindowsControlDefaultToplevel(type) \
	uiWindowsControlDefaultVisible(type) \
	uiWindowsControlDefaultShow(type) \
	uiWindowsControlDefaultHide(type) \
	uiWindowsControlDefaultEnabled(type) \
	uiWindowsControlDefaultEnable(type) \
	uiWindowsControlDefaultDisable(type) \
	uiWindowsControlDefaultSyncEnableState(type) \
	uiWindowsControlDefaultSetParentHWND(type) \
	uiWindowsControlDefaultMinimumSizeChanged(type) \
	uiWindowsControlDefaultLayoutRect(type) \
	uiWindowsControlDefaultAssignControlIDZOrder(type) \
	uiWindowsControlDefaultChildVisibilityChanged(type)

#define uiWindowsControlAllDefaults(type) \
	uiWindowsControlDefaultDestroy(type) \
	uiWindowsControlAllDefaultsExceptDestroy(type)

// TODO document
#define uiWindowsNewControl(type, var) \
	var = type(uiWindowsAllocControl(sizeof (type), type ## Signature, #type)); \
	uiControl(var)->Destroy = type ## Destroy; \
	uiControl(var)->Handle = type ## Handle; \
	uiControl(var)->Parent = type ## Parent; \
	uiControl(var)->SetParent = type ## SetParent; \
	uiControl(var)->Toplevel = type ## Toplevel; \
	uiControl(var)->Visible = type ## Visible; \
	uiControl(var)->Show = type ## Show; \
	uiControl(var)->Hide = type ## Hide; \
	uiControl(var)->Enabled = type ## Enabled; \
	uiControl(var)->Enable = type ## Enable; \
	uiControl(var)->Disable = type ## Disable; \
	uiWindowsControl(var)->SyncEnableState = type ## SyncEnableState; \
	uiWindowsControl(var)->SetParentHWND = type ## SetParentHWND; \
	uiWindowsControl(var)->MinimumSize = type ## MinimumSize; \
	uiWindowsControl(var)->MinimumSizeChanged = type ## MinimumSizeChanged; \
	uiWindowsControl(var)->LayoutRect = type ## LayoutRect; \
	uiWindowsControl(var)->AssignControlIDZOrder = type ## AssignControlIDZOrder; \
	uiWindowsControl(var)->ChildVisibilityChanged = type ## ChildVisibilityChanged; \
	uiWindowsControl(var)->visible = 1; \
	uiWindowsControl(var)->enabled = 1;
// TODO document
uiprivExtern uiWindowsControl *uiWindowsAllocControl(size_t n, uint32_t typesig, const char *typenamestr);

// TODO document
uiprivExtern HWND uiWindowsEnsureCreateControlHWND(DWORD dwExStyle, LPCWSTR lpClassName, LPCWSTR lpWindowName, DWORD dwStyle, HINSTANCE hInstance, LPVOID lpParam, BOOL useStandardControlFont);

// TODO document
uiprivExtern void uiWindowsEnsureDestroyWindow(HWND hwnd);

// TODO document
// TODO document that this should only be used in SetParentHWND() implementations
uiprivExtern void uiWindowsEnsureSetParentHWND(HWND hwnd, HWND parent);

// TODO document
uiprivExtern void uiWindowsEnsureAssignControlIDZOrder(HWND hwnd, LONG_PTR *controlID, HWND *insertAfter);

// TODO document
uiprivExtern void uiWindowsEnsureGetClientRect(HWND hwnd, RECT *r);
uiprivExtern void uiWindowsEnsureGetWindowRect(HWND hwnd, RECT *r);

// TODO document
uiprivExtern char *uiWindowsWindowText(HWND hwnd);
uiprivExtern void uiWindowsSetWindowText(HWND hwnd, const char *text);

// TODO document
uiprivExtern int uiWindowsWindowTextWidth(HWND hwnd);

// TODO document
// TODO point out this should only be used in a resize cycle
uiprivExtern void uiWindowsEnsureMoveWindowDuringResize(HWND hwnd, int x, int y, int width, int height);

// TODO document
uiprivExtern void uiWindowsRegisterWM_COMMANDHandler(HWND hwnd, BOOL (*handler)(uiControl *, HWND, WORD, LRESULT *), uiControl *c);
uiprivExtern void uiWindowsUnregisterWM_COMMANDHandler(HWND hwnd);

// TODO document
uiprivExtern void uiWindowsRegisterWM_NOTIFYHandler(HWND hwnd, BOOL (*handler)(uiControl *, HWND, NMHDR *, LRESULT *), uiControl *c);
uiprivExtern void uiWindowsUnregisterWM_NOTIFYHandler(HWND hwnd);

// TODO document
uiprivExtern void uiWindowsRegisterWM_HSCROLLHandler(HWND hwnd, BOOL (*handler)(uiControl *, HWND, WORD, LRESULT *), uiControl *c);
uiprivExtern void uiWindowsUnregisterWM_HSCROLLHandler(HWND hwnd);

// TODO document
uiprivExtern void uiWindowsRegisterReceiveWM_WININICHANGE(HWND hwnd);
uiprivExtern void uiWindowsUnregisterReceiveWM_WININICHANGE(HWND hwnd);

// TODO document
typedef struct uiWindowsSizing uiWindowsSizing;
struct uiWindowsSizing {
	int BaseX;
	int BaseY;
	LONG InternalLeading;
};
uiprivExtern void uiWindowsGetSizing(HWND hwnd, uiWindowsSizing *sizing);
uiprivExtern void uiWindowsSizingDlgUnitsToPixels(uiWindowsSizing *sizing, int *x, int *y);
uiprivExtern void uiWindowsSizingStandardPadding(uiWindowsSizing *sizing, int *x, int *y);

// TODO document
uiprivExtern HWND uiWindowsMakeContainer(uiWindowsControl *c, void (*onResize)(uiWindowsControl *));

// TODO document
uiprivExtern BOOL uiWindowsControlTooSmall(uiWindowsControl *c);
uiprivExtern void uiWindowsControlContinueMinimumSizeChanged(uiWindowsControl *c);

// TODO document
uiprivExtern void uiWindowsControlAssignSoleControlIDZOrder(uiWindowsControl *);

// TODO document
uiprivExtern BOOL uiWindowsShouldStopSyncEnableState(uiWindowsControl *c, int enabled);

// TODO document
uiprivExtern void uiWindowsControlNotifyVisibilityChanged(uiWindowsControl *c);