func WndProc(hwnd w32.HWND, msg uint32, wparam, lparam uintptr) uintptr {
wnd := GetMsgHandler(hwnd)
if wnd == nil {
return uintptr(w32.DefWindowProc(hwnd, msg, wparam, lparam))
}
var rc uintptr
switch msg {
case w32.WM_ACTIVATE:
if wparam&0xffff != 0 {
/* This window has just been granted focus, so flag our internal
** key state as stale. We can't simply refresh our state because
** win32's GetKeyboardState isn't always accurate at this point
** in the event stream. */
wnd.keysStale = true
}
rc = w32.DefWindowProc(hwnd, msg, wparam, lparam)
case w32.WM_SHOWWINDOW:
w32.SetFocus(hwnd)
wnd.restoreCursor()
case w32.WM_LBUTTONDOWN, w32.WM_RBUTTONDOWN, w32.WM_MBUTTONDOWN:
wnd.button = wnd.button | buttonForDetail(msg)
var bpe wde.MouseDownEvent
bpe.Which = buttonForDetail(msg)
bpe.Where.X = int(lparam) & 0xFFFF
bpe.Where.Y = int(lparam>>16) & 0xFFFF
wnd.lastX = bpe.Where.X
wnd.lastY = bpe.Where.Y
wnd.events <- bpe
case w32.WM_LBUTTONUP, w32.WM_RBUTTONUP, w32.WM_MBUTTONUP:
wnd.button = wnd.button & ^buttonForDetail(msg)
var bpe wde.MouseUpEvent
bpe.Which = buttonForDetail(msg)
bpe.Where.X = int(lparam) & 0xFFFF
bpe.Where.Y = int(lparam>>16) & 0xFFFF
wnd.lastX = bpe.Where.X
wnd.lastY = bpe.Where.Y
wnd.events <- bpe
case w32.WM_MOUSEWHEEL:
var me wde.MouseEvent
screenX := int(lparam) & 0xFFFF
screenY := int(lparam>>16) & 0xFFFF
me.Where.X, me.Where.Y, _ = w32.ScreenToClient(wnd.hwnd, screenX, screenY)
button := wde.WheelDownButton
delta := int16((wparam >> 16) & 0xFFFF)
if delta > 0 {
button = wde.WheelUpButton
}
wnd.lastX = me.Where.X
wnd.lastX = me.Where.Y
wnd.events <- wde.MouseDownEvent{me, button}
wnd.events <- wde.MouseUpEvent{me, button}
case w32.WM_MOUSEMOVE:
var mme wde.MouseMovedEvent
mme.Where.X = int(lparam) & 0xFFFF
mme.Where.Y = int(lparam>>16) & 0xFFFF
if wnd.lastX != wnd.noX {
mme.From.X = int(wnd.lastX)
mme.From.Y = int(wnd.lastY)
} else {
mme.From.X = mme.Where.X
mme.From.Y = mme.Where.Y
}
wnd.lastX = mme.Where.X
wnd.lastY = mme.Where.Y
if !wnd.trackMouse {
var tme w32.TRACKMOUSEEVENT
tme.CbSize = uint32(unsafe.Sizeof(tme))
tme.DwFlags = w32.TME_LEAVE
tme.HwndTrack = hwnd
tme.DwHoverTime = w32.HOVER_DEFAULT
w32.TrackMouseEvent(&tme)
wnd.trackMouse = true
wnd.restoreCursor()
wnd.events <- wde.MouseEnteredEvent(mme)
} else {
if wnd.button == 0 {
wnd.events <- mme
} else {
var mde wde.MouseDraggedEvent
mde.MouseMovedEvent = mme
mde.Which = wnd.button
wnd.events <- mde
}
}
case w32.WM_MOUSELEAVE:
wnd.trackMouse = false
var wee wde.MouseExitedEvent
// TODO: get real position
wee.Where.Y = wnd.lastX
wee.Where.X = wnd.lastY
wnd.events <- wee
case w32.WM_SYSKEYDOWN, w32.WM_KEYDOWN:
translatable := w32.MapVirtualKeyEx(uint(wparam), w32.MAPVK_VK_TO_CHAR, w32.HKL(0))
wnd.keyDown = keyFromVirtualKeyCode(wparam)
wnd.keysDown[wnd.keyDown] = true
wnd.checkKeyState()
wnd.events <- wde.KeyDownEvent{wnd.keyDown}
if translatable == 0 {
kpe := wde.KeyTypedEvent{
wde.KeyEvent{wnd.keyDown},
"",
wnd.constructChord(),
}
wnd.events <- kpe
}
case w32.WM_SYSCHAR, w32.WM_CHAR:
glyph := syscall.UTF16ToString([]uint16{uint16(wparam)})
kpe := wde.KeyTypedEvent{
wde.KeyEvent{wnd.keyDown},
glyph,
wnd.constructChord(),
}
wnd.events <- kpe
case w32.WM_SYSKEYUP, w32.WM_KEYUP:
keyUp := keyFromVirtualKeyCode(wparam)
delete(wnd.keysDown, keyUp)
wnd.checkKeyState()
wnd.events <- wde.KeyUpEvent{
keyUp,
}
case w32.WM_SIZE:
width := int(lparam) & 0xFFFF
height := int(lparam>>16) & 0xFFFF
wnd.buffer = NewDIB(image.Rect(0, 0, width, height))
wnd.events <- wde.ResizeEvent{width, height}
rc = w32.DefWindowProc(hwnd, msg, wparam, lparam)
case w32.WM_PAINT:
wnd.Repaint()
rc = w32.DefWindowProc(hwnd, msg, wparam, lparam)
case WDEM_UI_THREAD:
f := <-wnd.uiTasks
f()
case w32.WM_CLOSE:
wnd.events <- wde.CloseEvent{}
case w32.WM_DESTROY:
w32.PostQuitMessage(0)
default:
rc = w32.DefWindowProc(hwnd, msg, wparam, lparam)
}
return rc
}
// Focus set the focus on the window.
func (win *window) Focus() {
w32.SetFocus(win.id)
}
func (this *ControlBase) Focus() {
w32.SetFocus(this.hwnd)
}
func WndProc(hwnd w32.HWND, msg uint, wparam, lparam uintptr) uintptr {
wnd := GetMsgHandler(hwnd)
if wnd == nil {
return uintptr(w32.DefWindowProc(hwnd, msg, wparam, lparam))
}
var rc uintptr
switch msg {
case w32.WM_SHOWWINDOW:
w32.SetFocus(hwnd)
case w32.WM_LBUTTONDOWN, w32.WM_RBUTTONDOWN, w32.WM_MBUTTONDOWN:
wnd.button = wnd.button | buttonForDetail(msg)
var bpe wde.MouseDownEvent
bpe.Which = buttonForDetail(msg)
bpe.Where.X = int(lparam) & 0xFFFF
bpe.Where.Y = int(lparam>>16) & 0xFFFF
wnd.lastX = bpe.Where.X
wnd.lastY = bpe.Where.Y
wnd.events <- bpe
case w32.WM_LBUTTONUP, w32.WM_RBUTTONUP, w32.WM_MBUTTONUP:
wnd.button = wnd.button & ^buttonForDetail(msg)
var bpe wde.MouseUpEvent
bpe.Which = buttonForDetail(msg)
bpe.Where.X = int(lparam) & 0xFFFF
bpe.Where.Y = int(lparam>>16) & 0xFFFF
wnd.lastX = bpe.Where.X
wnd.lastY = bpe.Where.Y
wnd.events <- bpe
case w32.WM_MOUSEMOVE:
var mme wde.MouseMovedEvent
mme.Where.X = int(lparam) & 0xFFFF
mme.Where.Y = int(lparam>>16) & 0xFFFF
if wnd.lastX != wnd.noX {
mme.From.X = int(wnd.lastX)
mme.From.Y = int(wnd.lastY)
} else {
mme.From.X = mme.Where.X
mme.From.Y = mme.Where.Y
}
wnd.lastX = mme.Where.X
wnd.lastY = mme.Where.Y
if !wnd.trackMouse {
var tme w32.TRACKMOUSEEVENT
tme.CbSize = uint(unsafe.Sizeof(tme))
tme.DwFlags = w32.TME_LEAVE
tme.HwndTrack = hwnd
tme.DwHoverTime = w32.HOVER_DEFAULT
w32.TrackMouseEvent(&tme)
wnd.trackMouse = true
wnd.events <- wde.MouseEnteredEvent(mme)
} else {
if wnd.button == 0 {
wnd.events <- mme
} else {
var mde wde.MouseDraggedEvent
mde.MouseMovedEvent = mme
mde.Which = wnd.button
wnd.events <- mde
}
}
case w32.WM_MOUSELEAVE:
wnd.trackMouse = false
var wee wde.MouseExitedEvent
// TODO: get real position
wee.Where.Y = wnd.lastX
wee.Where.X = wnd.lastY
wnd.events <- wee
case w32.WM_SYSKEYDOWN:
keyDown = keyFromVirtualKeyCode(wparam)
keysDown[wde.KeyLeftAlt] = true
keysDown[keyDown] = true
ke := wde.KeyEvent{
keyDown,
}
wnd.events <- wde.KeyDownEvent(ke)
case w32.WM_KEYDOWN:
keyDown = keyFromVirtualKeyCode(wparam)
keysDown[keyDown] = true
ke := wde.KeyEvent{
keyDown,
}
wnd.events <- wde.KeyDownEvent(ke)
case w32.WM_SYSCHAR:
glyph := syscall.UTF16ToString([]uint16{uint16(wparam)})
ke := wde.KeyEvent{
keyDown,
}
kpe := wde.KeyTypedEvent{
ke,
glyph,
wde.ConstructChord(keysDown),
}
wnd.events <- kpe
case w32.WM_CHAR:
glyph := syscall.UTF16ToString([]uint16{uint16(wparam)})
ke := wde.KeyEvent{
keyDown,
}
kpe := wde.KeyTypedEvent{
ke,
glyph,
wde.ConstructChord(keysDown),
}
wnd.events <- kpe
case w32.WM_SYSKEYUP:
keyUp := keyFromVirtualKeyCode(wparam)
delete(keysDown, wde.KeyLeftAlt)
delete(keysDown, keyUp)
wnd.events <- wde.KeyUpEvent{
keyUp,
}
case w32.WM_KEYUP:
keyUp := keyFromVirtualKeyCode(wparam)
delete(keysDown, keyUp)
wnd.events <- wde.KeyUpEvent{
keyUp,
}
case w32.WM_SIZE:
width := int(lparam) & 0xFFFF
height := int(lparam>>16) & 0xFFFF
wnd.buffer = NewDIB(image.Rect(0, 0, width, height))
wnd.events <- wde.ResizeEvent{width, height}
rc = w32.DefWindowProc(hwnd, msg, wparam, lparam)
case w32.WM_PAINT:
rc = w32.DefWindowProc(hwnd, msg, wparam, lparam)
case w32.WM_CLOSE:
UnRegMsgHandler(hwnd)
w32.DestroyWindow(hwnd)
wnd.events <- wde.CloseEvent{}
case w32.WM_DESTROY:
w32.PostQuitMessage(0)
default:
rc = w32.DefWindowProc(hwnd, msg, wparam, lparam)
}
return rc
}