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Added Area mouse events on Windows. Also more TODOs.

This commit is contained in:
Pietro Gagliardi 2014-03-25 15:06:43 -04:00
parent 2b48f7cabf
commit 9533b3d7d4
5 changed files with 342 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

134
area_windows.go
View File

@ -24,6 +24,32 @@ var (
areaWndClassNumLock sync.Mutex
)
func getScrollPos(hwnd _HWND) (xpos int32, ypos int32) {
var si _SCROLLINFO
si.cbSize = uint32(unsafe.Sizeof(si))
si.fMask = _SIF_POS | _SIF_TRACKPOS
r1, _, err := _getScrollInfo.Call(
uintptr(hwnd),
uintptr(_SB_HORZ),
uintptr(unsafe.Pointer(&si)))
if r1 == 0 { // failure
panic(fmt.Errorf("error getting horizontal scroll position for Area: %v", err))
}
xpos = si.nPos
si.cbSize = uint32(unsafe.Sizeof(si)) // MSDN example code reinitializes this each time, so we'll do it too just to be safe
si.fMask = _SIF_POS | _SIF_TRACKPOS
r1, _, err = _getScrollInfo.Call(
uintptr(hwnd),
uintptr(_SB_VERT),
uintptr(unsafe.Pointer(&si)))
if r1 == 0 { // failure
panic(fmt.Errorf("error getting vertical scroll position for Area: %v", err))
}
ypos = si.nPos
return xpos, ypos
}
var (
_getUpdateRect = user32.NewProc("GetUpdateRect")
_beginPaint = user32.NewProc("BeginPaint")
@ -51,7 +77,6 @@ func paintArea(s *sysData) {
var xrect _RECT
var ps _PAINTSTRUCT
var si _SCROLLINFO
// TODO send _TRUE if we want to erase the clip area
r1, _, _ := _getUpdateRect.Call(
@ -62,36 +87,17 @@ func paintArea(s *sysData) {
return
}
si.cbSize = uint32(unsafe.Sizeof(si))
si.fMask = _SIF_POS | _SIF_TRACKPOS
r1, _, err := _getScrollInfo.Call(
uintptr(s.hwnd),
uintptr(_SB_HORZ),
uintptr(unsafe.Pointer(&si)))
if r1 == 0 { // failure
panic(fmt.Errorf("error getting horizontal scroll position for Area repaint: %v", err))
}
hscroll := int(si.nPos)
si.cbSize = uint32(unsafe.Sizeof(si)) // MSDN example code reinitializes this each time, so we'll do it too just to be safe
si.fMask = _SIF_POS | _SIF_TRACKPOS
r1, _, err = _getScrollInfo.Call(
uintptr(s.hwnd),
uintptr(_SB_VERT),
uintptr(unsafe.Pointer(&si)))
if r1 == 0 { // failure
panic(fmt.Errorf("error getting vertical scroll position for Area repaint: %v", err))
}
vscroll := int(si.nPos)
hscroll, vscroll := getScrollPos(s.hwnd)
cliprect := image.Rect(int(xrect.Left), int(xrect.Top), int(xrect.Right), int(xrect.Bottom))
cliprect = cliprect.Add(image.Pt(hscroll, vscroll)) // adjust by scroll position
cliprect = cliprect.Add(image.Pt(int(hscroll), int(vscroll))) // adjust by scroll position
// make sure the cliprect doesn't fall outside the size of the Area
cliprect = cliprect.Intersect(image.Rect(0, 0, 320, 240)) // TODO change when adding resizing
if cliprect.Empty() { // still no update rect
return
}
r1, _, err = _beginPaint.Call(
r1, _, err := _beginPaint.Call(
uintptr(s.hwnd),
uintptr(unsafe.Pointer(&ps)))
if r1 == 0 { // failure
@ -300,6 +306,57 @@ func adjustAreaScrollbars(hwnd _HWND) {
uintptr(_TRUE)) // redraw the scroll bar
}
var (
_getKeyState = user32.NewProc("GetKeyState")
)
func getModifiers() (m Modifiers) {
down := func(x uintptr) bool {
r1, _, _ := _getKeyState.Call(x)
return (r1 & 0x80) != 0
}
if down(_VK_CONTROL) {
m |= Ctrl
}
if down(_VK_MENU) {
m |= Alt
}
if down(_VK_SHIFT) {
m |= Shift
}
// TODO windows key (super)
return m
}
func areaMouseEvent(s *sysData, button uint, up bool, count uint, wparam _WPARAM, lparam _LPARAM) {
var me MouseEvent
xpos, ypos := getScrollPos(s.hwnd) // mouse coordinates are relative to control; make them relative to Area
xpos += lparam._X()
ypos += lparam._Y()
me.Pos = image.Pt(int(xpos), int(ypos))
if up {
me.Up = button
} else {
me.Down = button
me.Count = count
}
// though wparam will contain control and shift state, let's use just one function to get modifiers for both keyboard and mouse events; it'll work the same anyway since we have to do this for alt and windows key (super)
me.Modifiers = getModifiers()
if button != 1 && (wparam & _MK_LBUTTON) != 0 {
me.Held = append(me.Held, 1)
}
if button != 2 && (wparam & _MK_MBUTTON) != 0 {
me.Held = append(me.Held, 2)
}
if button != 3 && (wparam & _MK_RBUTTON) != 0 {
me.Held = append(me.Held, 3)
}
// TODO XBUTTONs?
s.handler.Mouse(me)
}
func areaWndProc(s *sysData) func(hwnd _HWND, uMsg uint32, wParam _WPARAM, lParam _LPARAM) _LRESULT {
return func(hwnd _HWND, uMsg uint32, wParam _WPARAM, lParam _LPARAM) _LRESULT {
switch uMsg {
@ -315,6 +372,37 @@ func areaWndProc(s *sysData) func(hwnd _HWND, uMsg uint32, wParam _WPARAM, lPara
case _WM_SIZE:
adjustAreaScrollbars(hwnd) // don't use s.hwnd; this message can be sent before that's loaded
return 0
case _WM_MOUSEMOVE:
areaMouseEvent(s, 0, false, 0, wParam, lParam)
return 0
case _WM_LBUTTONDOWN:
areaMouseEvent(s, 1, false, 1, wParam, lParam)
return 0
case _WM_LBUTTONDBLCLK:
areaMouseEvent(s, 1, false, 2, wParam, lParam)
return 0
case _WM_LBUTTONUP:
areaMouseEvent(s, 1, true, 0, wParam, lParam)
return 0
case _WM_MBUTTONDOWN:
areaMouseEvent(s, 2, false, 1, wParam, lParam)
return 0
case _WM_MBUTTONDBLCLK:
areaMouseEvent(s, 2, false, 2, wParam, lParam)
return 0
case _WM_MBUTTONUP:
areaMouseEvent(s, 2, true, 0, wParam, lParam)
return 0
case _WM_RBUTTONDOWN:
areaMouseEvent(s, 3, false, 1, wParam, lParam)
return 0
case _WM_RBUTTONDBLCLK:
areaMouseEvent(s, 3, false, 2, wParam, lParam)
return 0
case _WM_RBUTTONUP:
areaMouseEvent(s, 3, true, 0, wParam, lParam)
return 0
// TODO XBUTTONs?
default:
r1, _, _ := defWindowProc.Call(
uintptr(hwnd),

14
common_windows.go
View File

@ -50,6 +50,20 @@ func _MAKEINTRESOURCE(what uint16) uintptr {
return uintptr(what)
}
func (l _LPARAM) _X() int32 {
// according to windowsx.h
loword := uint16(l & 0xFFFF)
short := int16(loword) // convert to signed...
return int32(short) // ...and sign extend
}
func (l _LPARAM) _Y() int32 {
// according to windowsx.h
hiword := uint16((l & 0xFFFF0000) >> 16)
short := int16(hiword) // convert to signed...
return int32(short) // ...and sign extend
}
type _POINT struct {
X int32
Y int32

215
events_windows.go Normal file
View File

@ -0,0 +1,215 @@
// 25 march 2014
package ui
// Virtual key codes.
const (
// from winuser.h
_VK_LBUTTON = 0x01
_VK_RBUTTON = 0x02
_VK_CANCEL = 0x03
_VK_MBUTTON = 0x04
_VK_XBUTTON1 = 0x05
_VK_XBUTTON2 = 0x06
_VK_BACK = 0x08
_VK_TAB = 0x09
_VK_CLEAR = 0x0C
_VK_RETURN = 0x0D
_VK_SHIFT = 0x10
_VK_CONTROL = 0x11
_VK_MENU = 0x12
_VK_PAUSE = 0x13
_VK_CAPITAL = 0x14
_VK_KANA = 0x15
_VK_HANGEUL = 0x15
_VK_HANGUL = 0x15
_VK_JUNJA = 0x17
_VK_FINAL = 0x18
_VK_HANJA = 0x19
_VK_KANJI = 0x19
_VK_ESCAPE = 0x1B
_VK_CONVERT = 0x1C
_VK_NONCONVERT = 0x1D
_VK_ACCEPT = 0x1E
_VK_MODECHANGE = 0x1F
_VK_SPACE = 0x20
_VK_PRIOR = 0x21
_VK_NEXT = 0x22
_VK_END = 0x23
_VK_HOME = 0x24
_VK_LEFT = 0x25
_VK_UP = 0x26
_VK_RIGHT = 0x27
_VK_DOWN = 0x28
_VK_SELECT = 0x29
_VK_PRINT = 0x2A
_VK_EXECUTE = 0x2B
_VK_SNAPSHOT = 0x2C
_VK_INSERT = 0x2D
_VK_DELETE = 0x2E
_VK_HELP = 0x2F
_VK_LWIN = 0x5B
_VK_RWIN = 0x5C
_VK_APPS = 0x5D
_VK_SLEEP = 0x5F
_VK_NUMPAD0 = 0x60
_VK_NUMPAD1 = 0x61
_VK_NUMPAD2 = 0x62
_VK_NUMPAD3 = 0x63
_VK_NUMPAD4 = 0x64
_VK_NUMPAD5 = 0x65
_VK_NUMPAD6 = 0x66
_VK_NUMPAD7 = 0x67
_VK_NUMPAD8 = 0x68
_VK_NUMPAD9 = 0x69
_VK_MULTIPLY = 0x6A
_VK_ADD = 0x6B
_VK_SEPARATOR = 0x6C
_VK_SUBTRACT = 0x6D
_VK_DECIMAL = 0x6E
_VK_DIVIDE = 0x6F
_VK_F1 = 0x70
_VK_F2 = 0x71
_VK_F3 = 0x72
_VK_F4 = 0x73
_VK_F5 = 0x74
_VK_F6 = 0x75
_VK_F7 = 0x76
_VK_F8 = 0x77
_VK_F9 = 0x78
_VK_F10 = 0x79
_VK_F11 = 0x7A
_VK_F12 = 0x7B
_VK_F13 = 0x7C
_VK_F14 = 0x7D
_VK_F15 = 0x7E
_VK_F16 = 0x7F
_VK_F17 = 0x80
_VK_F18 = 0x81
_VK_F19 = 0x82
_VK_F20 = 0x83
_VK_F21 = 0x84
_VK_F22 = 0x85
_VK_F23 = 0x86
_VK_F24 = 0x87
_VK_NUMLOCK = 0x90
_VK_SCROLL = 0x91
_VK_OEM_NEC_EQUAL = 0x92
_VK_OEM_FJ_JISHO = 0x92
_VK_OEM_FJ_MASSHOU = 0x93
_VK_OEM_FJ_TOUROKU = 0x94
_VK_OEM_FJ_LOYA = 0x95
_VK_OEM_FJ_ROYA = 0x96
_VK_LSHIFT = 0xA0
_VK_RSHIFT = 0xA1
_VK_LCONTROL = 0xA2
_VK_RCONTROL = 0xA3
_VK_LMENU = 0xA4
_VK_RMENU = 0xA5
_VK_BROWSER_BACK = 0xA6
_VK_BROWSER_FORWARD = 0xA7
_VK_BROWSER_REFRESH = 0xA8
_VK_BROWSER_STOP = 0xA9
_VK_BROWSER_SEARCH = 0xAA
_VK_BROWSER_FAVORITES = 0xAB
_VK_BROWSER_HOME = 0xAC
_VK_VOLUME_MUTE = 0xAD
_VK_VOLUME_DOWN = 0xAE
_VK_VOLUME_UP = 0xAF
_VK_MEDIA_NEXT_TRACK = 0xB0
_VK_MEDIA_PREV_TRACK = 0xB1
_VK_MEDIA_STOP = 0xB2
_VK_MEDIA_PLAY_PAUSE = 0xB3
_VK_LAUNCH_MAIL = 0xB4
_VK_LAUNCH_MEDIA_SELECT = 0xB5
_VK_LAUNCH_APP1 = 0xB6
_VK_LAUNCH_APP2 = 0xB7
_VK_OEM_1 = 0xBA
_VK_OEM_PLUS = 0xBB
_VK_OEM_COMMA = 0xBC
_VK_OEM_MINUS = 0xBD
_VK_OEM_PERIOD = 0xBE
_VK_OEM_2 = 0xBF
_VK_OEM_3 = 0xC0
_VK_OEM_4 = 0xDB
_VK_OEM_5 = 0xDC
_VK_OEM_6 = 0xDD
_VK_OEM_7 = 0xDE
_VK_OEM_8 = 0xDF
_VK_OEM_AX = 0xE1
_VK_OEM_102 = 0xE2
_VK_ICO_HELP = 0xE3
_VK_ICO_00 = 0xE4
_VK_PROCESSKEY = 0xE5
_VK_ICO_CLEAR = 0xE6
_VK_PACKET = 0xE7
_VK_OEM_RESET = 0xE9
_VK_OEM_JUMP = 0xEA
_VK_OEM_PA1 = 0xEB
_VK_OEM_PA2 = 0xEC
_VK_OEM_PA3 = 0xED
_VK_OEM_WSCTRL = 0xEE
_VK_OEM_CUSEL = 0xEF
_VK_OEM_ATTN = 0xF0
_VK_OEM_FINISH = 0xF1
_VK_OEM_COPY = 0xF2
_VK_OEM_AUTO = 0xF3
_VK_OEM_ENLW = 0xF4
_VK_OEM_BACKTAB = 0xF5
_VK_ATTN = 0xF6
_VK_CRSEL = 0xF7
_VK_EXSEL = 0xF8
_VK_EREOF = 0xF9
_VK_PLAY = 0xFA
_VK_ZOOM = 0xFB
_VK_NONAME = 0xFC
_VK_PA1 = 0xFD
_VK_OEM_CLEAR = 0xFE
)
// Mouse event modifier masks.
const (
// from winuser.h
_MK_LBUTTON = 0x0001
_MK_RBUTTON = 0x0002
_MK_SHIFT = 0x0004
_MK_CONTROL = 0x0008
_MK_MBUTTON = 0x0010
_MK_XBUTTON1 = 0x0020
_MK_XBUTTON2 = 0x0040
)
// Window mouse event messages.
const (
// from winuser.h
_WM_MOUSEFIRST = 0x0200
_WM_MOUSEMOVE = 0x0200
_WM_LBUTTONDOWN = 0x0201
_WM_LBUTTONUP = 0x0202
_WM_LBUTTONDBLCLK = 0x0203
_WM_RBUTTONDOWN = 0x0204
_WM_RBUTTONUP = 0x0205
_WM_RBUTTONDBLCLK = 0x0206
_WM_MBUTTONDOWN = 0x0207
_WM_MBUTTONUP = 0x0208
_WM_MBUTTONDBLCLK = 0x0209
_WM_MOUSEWHEEL = 0x020A
_WM_XBUTTONDOWN = 0x020B
_WM_XBUTTONUP = 0x020C
_WM_XBUTTONDBLCLK = 0x020D
)
// Window keyboard event messages and related constants.
const (
// from winuser.h
_WM_KEYDOWN = 0x0100
_WM_KEYUP = 0x0101
_WM_CHAR = 0x0102
_WM_DEADCHAR = 0x0103
_WM_SYSKEYDOWN = 0x0104
_WM_SYSKEYUP = 0x0105
_WM_SYSCHAR = 0x0106
_WM_SYSDEADCHAR = 0x0107
_WM_UNICHAR = 0x0109
_UNICODE_NOCHAR = 0xFFFF // used by _WM_UNICHAR
)

2
test/main.go
View File

@ -132,7 +132,7 @@ func (a *areaHandler) Paint(rect image.Rectangle) *image.NRGBA {
return a.img.SubImage(rect).(*image.NRGBA)
}
func (a *areaHandler) Mouse(e MouseEvent) {
// fmt.Printf("%#v\n", e)
fmt.Printf("%#v\n", e)
}
func (a *areaHandler) Key(e KeyEvent) bool {
fmt.Printf("%#v\n", e)

1
todo.md
View File

@ -48,6 +48,7 @@ important things:
- make sure scrollbars in Listbox work identically on all platforms (specifically the existence and autohiding of both horizontal and vertical scrollbars)
- pin down this behavior; also note non-editability
- the size of Listboxes on Windows does not fill the requested space completely (wait, wasn't there a style that governed this?)
- make sure mouse events don't trigger if the control size is larger than the Area size and the mouse event happens outside the Area range on all platforms
super ultra important things:
- the windows build appears to be unstable: