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// 8 february 2014
package main
import (
"syscall"
"unsafe"
)
// Window styles.
const (
WS_BORDER = 0x00800000
WS_CAPTION = 0x00C00000
WS_CHILD = 0x40000000
WS_CHILDWINDOW = 0x40000000
WS_CLIPCHILDREN = 0x02000000
WS_CLIPSIBLINGS = 0x04000000
WS_DISABLED = 0x08000000
WS_DLGFRAME = 0x00400000
WS_GROUP = 0x00020000
WS_HSCROLL = 0x00100000
WS_ICONIC = 0x20000000
WS_MAXIMIZE = 0x01000000
WS_MAXIMIZEBOX = 0x00010000
WS_MINIMIZE = 0x20000000
WS_MINIMIZEBOX = 0x00020000
WS_OVERLAPPED = 0x00000000
WS_OVERLAPPEDWINDOW = (WS_OVERLAPPED | WS_CAPTION | WS_SYSMENU | WS_THICKFRAME | WS_MINIMIZEBOX | WS_MAXIMIZEBOX)
WS_POPUP = 0x80000000
WS_POPUPWINDOW = (WS_POPUP | WS_BORDER | WS_SYSMENU)
WS_SIZEBOX = 0x00040000
WS_SYSMENU = 0x00080000
WS_TABSTOP = 0x00010000
WS_THICKFRAME = 0x00040000
WS_TILED = 0x00000000
WS_TILEDWINDOW = (WS_OVERLAPPED | WS_CAPTION | WS_SYSMENU | WS_THICKFRAME | WS_MINIMIZEBOX | WS_MAXIMIZEBOX)
WS_VISIBLE = 0x10000000
WS_VSCROLL = 0x00200000
)
// Extended window styles.
const (
WS_EX_ACCEPTFILES = 0x00000010
WS_EX_APPWINDOW = 0x00040000
WS_EX_CLIENTEDGE = 0x00000200
// WS_EX_COMPOSITED = 0x02000000 // [Windows 2000:This style is not supported.]
WS_EX_CONTEXTHELP = 0x00000400
WS_EX_CONTROLPARENT = 0x00010000
WS_EX_DLGMODALFRAME = 0x00000001
WS_EX_LAYERED = 0x00080000
WS_EX_LAYOUTRTL = 0x00400000
WS_EX_LEFT = 0x00000000
WS_EX_LEFTSCROLLBAR = 0x00004000
WS_EX_LTRREADING = 0x00000000
WS_EX_MDICHILD = 0x00000040
WS_EX_NOACTIVATE = 0x08000000
WS_EX_NOINHERITLAYOUT = 0x00100000
WS_EX_NOPARENTNOTIFY = 0x00000004
WS_EX_OVERLAPPEDWINDOW = (WS_EX_WINDOWEDGE | WS_EX_CLIENTEDGE)
WS_EX_PALETTEWINDOW = (WS_EX_WINDOWEDGE | WS_EX_TOOLWINDOW | WS_EX_TOPMOST)
WS_EX_RIGHT = 0x00001000
WS_EX_RIGHTSCROLLBAR = 0x00000000
WS_EX_RTLREADING = 0x00002000
WS_EX_STATICEDGE = 0x00020000
WS_EX_TOOLWINDOW = 0x00000080
WS_EX_TOPMOST = 0x00000008
WS_EX_TRANSPARENT = 0x00000020
WS_EX_WINDOWEDGE = 0x00000100
)
// bizarrely, this value is given on the page for CreateMDIWindow, but not CreateWindow or CreateWindowEx
// I do it this way because Go won't let me shove the exact value into an int
var (
_uCW_USEDEFAULT uint = 0x80000000
CW_USEDEFAULT = int(_uCW_USEDEFAULT)
)
// GetSysColor values. These can be cast to HBRUSH (after adding 1) for WNDCLASS as well.
const (
COLOR_3DDKSHADOW = 21
COLOR_3DFACE = 15
COLOR_3DHIGHLIGHT = 20
COLOR_3DHILIGHT = 20
COLOR_3DLIGHT = 22
COLOR_3DSHADOW = 16
COLOR_ACTIVEBORDER = 10
COLOR_ACTIVECAPTION = 2
COLOR_APPWORKSPACE = 12
COLOR_BACKGROUND = 1
COLOR_BTNFACE = 15
COLOR_BTNHIGHLIGHT = 20
COLOR_BTNHILIGHT = 20
COLOR_BTNSHADOW = 16
COLOR_BTNTEXT = 18
COLOR_CAPTIONTEXT = 9
COLOR_DESKTOP = 1
COLOR_GRADIENTACTIVECAPTION = 27
COLOR_GRADIENTINACTIVECAPTION = 28
COLOR_GRAYTEXT = 17
COLOR_HIGHLIGHT = 13
COLOR_HIGHLIGHTTEXT = 14
COLOR_HOTLIGHT = 26
COLOR_INACTIVEBORDER = 11
COLOR_INACTIVECAPTION = 3
COLOR_INACTIVECAPTIONTEXT = 19
COLOR_INFOBK = 24
COLOR_INFOTEXT = 23
COLOR_MENU = 4
// COLOR_MENUHILIGHT = 29 // [Windows 2000:This value is not supported.]
// COLOR_MENUBAR = 30 // [Windows 2000:This value is not supported.]
COLOR_MENUTEXT = 7
COLOR_SCROLLBAR = 0
COLOR_WINDOW = 5
COLOR_WINDOWFRAME = 6
COLOR_WINDOWTEXT = 8
)
// ShowWindow settings.
const (
SW_FORCEMINIMIZE = 11
SW_HIDE = 0
SW_MAXIMIZE = 3
SW_MINIMIZE = 6
SW_RESTORE = 9
SW_SHOW = 5
SW_SHOWDEFAULT = 10
SW_SHOWMAXIMIZED = 3
SW_SHOWMINIMIZED = 2
SW_SHOWMINNOACTIVE = 7
SW_SHOWNA = 8
SW_SHOWNOACTIVATE = 4
SW_SHOWNORMAL = 1
)
var (
createWindowEx = user32.NewProc("CreateWindowExW")
showWindow = user32.NewProc("ShowWindow")
)
// TODO use lpParam
func CreateWindowEx(dwExStyle uint32, lpClassName string, lpWindowName string, dwStyle uint32, x int, y int, nWidth int, nHeight int, hwndParent HWND, hMenu HANDLE, hInstance HANDLE, lpParam interface{}) (hwnd HWND, err error) {
r1, _, err := createWindowEx.Call(
uintptr(dwExStyle),
uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(lpClassName))),
uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(lpWindowName))),
uintptr(dwStyle),
uintptr(x),
uintptr(y),
uintptr(nWidth),
uintptr(nHeight),
uintptr(hwndParent),
uintptr(hMenu),
uintptr(hInstance),
uintptr(0))
if r1 == 0 { // failure
return NULL, err
}
return HWND(r1), nil
}
// TODO figure out how to handle errors
func ShowWindow(hWnd HWND, nCmdShow int) (previouslyVisible bool, err error) {
r1, _, _ := showWindow.Call(
uintptr(hWnd),
uintptr(nCmdShow))
return r1 != 0, nil
}
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