func (i *imagelist) apply(hwnd C.HWND, uMsg C.UINT) {
width := C.GetSystemMetrics(C.SM_CXSMICON)
height := C.GetSystemMetrics(C.SM_CYSMICON)
il := C.newImageList(width, height)
for index := range i.list {
C.addImage(il, hwnd, i.list[index], C.int(i.width[index]), C.int(i.height[index]), width, height)
}
C.SendMessageW(hwnd, uMsg, 0, C.LPARAM(uintptr(unsafe.Pointer(il))))
}
//export finishAreaMouseEvent
func finishAreaMouseEvent(data unsafe.Pointer, cbutton C.DWORD, up C.BOOL, heldButtons C.uintptr_t, xpos C.int, ypos C.int) {
var me MouseEvent
a := (*area)(data)
button := uint(cbutton)
me.Pos = image.Pt(int(xpos), int(ypos))
if !me.Pos.In(image.Rect(0, 0, a.width, a.height)) { // outside the actual Area; no event
return
}
if up != C.FALSE {
me.Up = button
} else if button != 0 { // don't run the click counter if the mouse was only moved
me.Down = button
// this returns a LONG, which is int32, but we don't need to worry about the signedness because for the same bit widths and two's complement arithmetic, s1-s2 == u1-u2 if bits(s1)==bits(s2) and bits(u1)==bits(u2) (and Windows requires two's complement: http://blogs.msdn.com/b/oldnewthing/archive/2005/05/27/422551.aspx)
// signedness isn't much of an issue for these calls anyway because http://stackoverflow.com/questions/24022225/what-are-the-sign-extension-rules-for-calling-windows-api-functions-stdcall-t and that we're only using unsigned values (think back to how you (didn't) handle signedness in assembly language) AND because of the above AND because the statistics below (time interval and width/height) really don't make sense if negative
time := C.GetMessageTime()
maxTime := C.GetDoubleClickTime()
// ignore zero returns and errors; MSDN says zero will be returned on error but that GetLastError() is meaningless
xdist := C.GetSystemMetrics(C.SM_CXDOUBLECLK)
ydist := C.GetSystemMetrics(C.SM_CYDOUBLECLK)
me.Count = a.clickCounter.click(button, me.Pos.X, me.Pos.Y,
uintptr(time), uintptr(maxTime), int(xdist/2), int(ydist/2))
}
// 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 && (heldButtons&C.MK_LBUTTON) != 0 {
me.Held = append(me.Held, 1)
}
if button != 2 && (heldButtons&C.MK_MBUTTON) != 0 {
me.Held = append(me.Held, 2)
}
if button != 3 && (heldButtons&C.MK_RBUTTON) != 0 {
me.Held = append(me.Held, 3)
}
if button != 4 && (heldButtons&C.MK_XBUTTON1) != 0 {
me.Held = append(me.Held, 4)
}
if button != 5 && (heldButtons&C.MK_XBUTTON2) != 0 {
me.Held = append(me.Held, 5)
}
a.handler.Mouse(me)
}
func (b *button) preferredSize(d *sizing) (width, height int) {
// comctl32.dll version 6 thankfully provides a method to grab this...
var size C.SIZE
size.cx = 0 // explicitly ask for ideal size
size.cy = 0
if C.SendMessageW(b._hwnd, C.BCM_GETIDEALSIZE, 0, C.LPARAM(uintptr(unsafe.Pointer(&size)))) != C.FALSE {
return int(size.cx), int(size.cy)
}
// that failed, fall back
println("message failed; falling back")
// don't worry about the error return from GetSystemMetrics(); there's no way to tell (explicitly documented as such)
xmargins := 2 * int(C.GetSystemMetrics(C.SM_CXEDGE))
return xmargins + int(b._textlen), fromdlgunitsY(buttonHeight, d)
}
func mouseIsLeft() bool {
return C.GetSystemMetrics(C.SM_SWAPBUTTON) == C.TRUE
}
func (wi *windowInternal) processEvent(message C.UINT, wParam C.WPARAM, lParam C.LPARAM) (events []Event, eventErrors []ThreadError) {
// Don't process any message until window is created
if wi.window.Handle == nil {
return
}
switch message {
case C.WM_DESTROY: // Destroy event
// Here we must cleanup resources !
wi.cleanup()
case C.WM_ACTIVATE:
// TODO fullscreen handling
if wi.monitor == nil || !wi.monitor.IsValid() {
break
}
// Were we deactivated/iconified?
wi.inactive = C.__LOWORD(C.DWORD(wParam)) == C.WA_INACTIVE
minimized := C.__HIWORD(C.DWORD(wParam)) != 0
if (wi.inactive || minimized) && !wi.minimized {
// _glfwInputDeactivation();
// If we are in fullscreen mode we need to iconify
if wi.monitor != nil && wi.monitor.IsValid() {
// Do we need to manually iconify?
if err := ChangeDisplaySettingsExW(&wi.monitor.internal.info.szDevice[0], nil, nil, 0, nil); err != nil {
// TODO: Error handling
panic(err)
}
if !minimized {
// Minimize window
// C.SetWindowULong(wi.window.Handle, C.GWL_STYLE, C.WS_POPUP)
// C.SetWindowLong(wi.window.Handle, C.GWL_EXSTYLE, 0)
// C.SetWindowPos(wi.window.Handle, HWND_BOTTOM, 1, 1, 10, 10, C.SWP_HIDEWINDOW)
C.ShowWindow(wi.window.Handle, C.SW_MINIMIZE)
minimized = true
}
// Restore the original desktop resolution
if err := ChangeDisplaySettingsExW(&wi.monitor.internal.info.szDevice[0], nil, nil, 0, nil); err != nil {
// TODO: Error handling
panic(err)
}
}
// Unlock mouse if locked
// if !_glfwWin.oldMouseLockValid {
// _glfwWin.oldMouseLock = _glfwWin.mouseLock;
// _glfwWin.oldMouseLockValid = GL_TRUE;
// glfwEnable( GLFW_MOUSE_CURSOR );
// }
} else if !wi.inactive || !minimized {
// If we are in fullscreen mode we need to maximize
if wi.monitor != nil && wi.monitor.IsValid() && wi.minimized {
// Change display settings to the user selected mode
if err := ChangeDisplaySettingsExW(&wi.monitor.internal.info.szDevice[0], wi.devMode, nil, C.CDS_FULLSCREEN, nil); err != nil {
// TODO error handling
panic(err)
}
// Do we need to manually restore window?
if minimized {
// Restore window
C.ShowWindow(wi.window.Handle, C.SW_RESTORE)
minimized = false
// Activate window
C.ShowWindow(wi.window.Handle, C.SW_SHOW)
// setForegroundWindow( _glfwWin.window );
C.SetFocus(wi.window.Handle)
}
// Lock mouse, if necessary
// if _glfwWin.oldMouseLockValid && _glfwWin.oldMouseLock {
// glfwDisable( GLFW_MOUSE_CURSOR );
// }
// _glfwWin.oldMouseLockValid = GL_FALSE;
}
}
wi.minimized = minimized
case C.WM_SETCURSOR: // Set cursor event
// The mouse has moved, if the cursor is in our window we must refresh the cursor
if C.__LOWORD(C.DWORD(lParam)) == C.HTCLIENT {
C.SetCursor(wi.cursor)
}
case C.WM_CLOSE: // Close event
events = append(events, WindowClosedEvent{})
case C.WM_SIZE: // Resize event
// Consider only events triggered by a maximize or a un-maximize
if wParam == C.SIZE_MINIMIZED || wi.resizing {
break
}
// Ignore cases where the window has only been moved
if x, y := wi.getSize(); wi.lastSizeX == x && wi.lastSizeY == y {
break
}
events = append(events, WindowResizeEvent{
Width: wi.lastSizeX,
Height: wi.lastSizeY,
})
case C.WM_ENTERSIZEMOVE: // Start resizing
wi.resizing = true
case C.WM_EXITSIZEMOVE: // Stop resizing
wi.resizing = false
// Ignore cases where the window has only been moved
if x, y := wi.getSize(); wi.lastSizeX == x && wi.lastSizeY == y {
break
} else {
wi.lastSizeX, wi.lastSizeY = x, y
}
events = append(events, WindowResizeEvent{
Width: wi.lastSizeX,
Height: wi.lastSizeY,
})
case C.WM_KILLFOCUS: // Lost focus event
events = append(events, WindowGainedFocusEvent{})
case C.WM_SETFOCUS: // Gain focus event
events = append(events, WindowLostFocusEvent{})
case C.WM_CHAR: // Text event
if !wi.keyRepeatEnabled && lParam&(1<<30) != 0 {
break
}
events = append(events, TextEnteredEvent{
Character: rune(wParam),
})
case C.WM_KEYDOWN, C.WM_SYSKEYDOWN: // Keydown event
if !wi.keyRepeatEnabled && C.__HIWORD(C.DWORD(lParam))&C.KF_REPEAT != 0 {
break
}
events = append(events, KeyPressedEvent{
Code: virtualKeyCodeToSF(wParam, lParam),
Alt: C.__HIWORD(C.DWORD(C.GetAsyncKeyState(C.VK_MENU))) != 0,
Control: C.__HIWORD(C.DWORD(C.GetAsyncKeyState(C.VK_CONTROL))) != 0,
Shift: C.__HIWORD(C.DWORD(C.GetAsyncKeyState(C.VK_SHIFT))) != 0,
System: C.__HIWORD(C.DWORD(C.GetAsyncKeyState(C.VK_LWIN))) != 0 || C.__HIWORD(C.DWORD(C.GetAsyncKeyState(C.VK_RWIN))) != 0,
})
case C.WM_KEYUP, C.WM_SYSKEYUP: // Keyup event
events = append(events, KeyReleasedEvent{
Code: virtualKeyCodeToSF(wParam, lParam),
Alt: C.__HIWORD(C.DWORD(C.GetAsyncKeyState(C.VK_MENU))) != 0,
Control: C.__HIWORD(C.DWORD(C.GetAsyncKeyState(C.VK_CONTROL))) != 0,
Shift: C.__HIWORD(C.DWORD(C.GetAsyncKeyState(C.VK_SHIFT))) != 0,
System: C.__HIWORD(C.DWORD(C.GetAsyncKeyState(C.VK_LWIN))) != 0 || C.__HIWORD(C.DWORD(C.GetAsyncKeyState(C.VK_RWIN))) != 0,
})
case C.WM_MOUSEWHEEL: // Mouse wheel event
// Mouse position is in screen coordinates, convert it to window coordinates
position := C.POINT{
x: C.LONG(C.__LOWORD(C.DWORD(lParam))),
y: C.LONG(C.__HIWORD(C.DWORD(lParam))),
}
C.__ScreenToClient(wi.window.Handle, &position)
events = append(events, MouseWheelEvent{
Delta: int(int16(C.__HIWORD(C.DWORD(wParam))) / 120),
X: int(position.x),
Y: int(position.y),
})
case C.WM_LBUTTONDOWN, C.WM_RBUTTONDOWN: // Mouse left/right button down event
button := mouse_vkeys_handed_map[mouseKey{message, C.GetSystemMetrics(C.SM_SWAPBUTTON) == C.TRUE}]
events = append(events, MouseButtonPressedEvent{
Button: button,
X: int(C.__LOWORD(C.DWORD(lParam))),
Y: int(C.__HIWORD(C.DWORD(lParam))),
})
case C.WM_LBUTTONUP, C.WM_RBUTTONUP: // Mouse left/right button up event
button := mouse_vkeys_handed_map[mouseKey{message, C.GetSystemMetrics(C.SM_SWAPBUTTON) == C.TRUE}]
events = append(events, MouseButtonReleasedEvent{
Button: button,
X: int(C.__LOWORD(C.DWORD(lParam))),
Y: int(C.__HIWORD(C.DWORD(lParam))),
})
case C.WM_MBUTTONDOWN: // Mouse wheel button down event
events = append(events, MouseButtonPressedEvent{
Button: MouseMiddle,
X: int(C.__LOWORD(C.DWORD(lParam))),
Y: int(C.__HIWORD(C.DWORD(lParam))),
})
case C.WM_MBUTTONUP: // Mouse wheel button up event
events = append(events, MouseButtonReleasedEvent{
Button: MouseMiddle,
X: int(C.__LOWORD(C.DWORD(lParam))),
Y: int(C.__HIWORD(C.DWORD(lParam))),
})
case C.WM_XBUTTONDOWN: // Mouse X button down event
event := MouseButtonPressedEvent{
X: int(C.__LOWORD(C.DWORD(lParam))),
Y: int(C.__HIWORD(C.DWORD(lParam))),
}
switch C.__HIWORD(C.DWORD(wParam)) {
default:
fallthrough
case C.XBUTTON1:
event.Button = MouseXButton1
case C.XBUTTON2:
event.Button = MouseXButton2
}
events = append(events, event)
case C.WM_XBUTTONUP: // Mouse X button up event
event := MouseButtonPressedEvent{
X: int(C.__LOWORD(C.DWORD(lParam))),
Y: int(C.__HIWORD(C.DWORD(lParam))),
}
switch C.__HIWORD(C.DWORD(wParam)) {
default:
fallthrough
case C.XBUTTON1:
event.Button = MouseXButton1
case C.XBUTTON2:
event.Button = MouseXButton2
}
events = append(events, event)
case C.WM_MOUSEMOVE: // Mouse move event
// Check if we need to generate a MouseEntered event
if !wi.isCursorIn {
mouseEvent := C.TRACKMOUSEEVENT{
cbSize: C.TRACKMOUSEEVENT_size,
hwndTrack: wi.window.Handle,
dwFlags: C.TME_LEAVE,
}
C.__TrackMouseEvent(&mouseEvent)
wi.isCursorIn = true
events = append(events, MouseEnteredEvent{})
}
events = append(events, MouseMoveEvent{
X: int(C.__LOWORD(C.DWORD(lParam))),
Y: int(C.__HIWORD(C.DWORD(lParam))),
})
case C.WM_MOUSELEAVE: // Mouse leave event
wi.isCursorIn = false
events = append(events, MouseLeftEvent{})
}
return
}
