void X11Window::create(XVisualInfo *visual, DisplayWindowSite *new_site, const DisplayWindowDescription &desc)
{
site = new_site;
// Reset all variables
close_window();
handle.screen = visual->screen;
atoms = X11Atoms(handle.display);
int disp_width_px = XDisplayWidth(handle.display, handle.screen);
int disp_height_px = XDisplayHeight(handle.display, handle.screen);
int disp_width_mm = XDisplayWidthMM(handle.display, handle.screen);
// Get DPI of screen or use 96.0f if Xlib doesn't have a value.
ppi = (disp_width_mm < 24) ? 96.0f : (25.4f * static_cast<float>(disp_width_px) / static_cast<float>(disp_width_mm));
// Update pixel ratio.
set_pixel_ratio(pixel_ratio);
// Get X11 root window.
auto _root_window = RootWindow(handle.display, handle.screen);
// Get and validate initial window position and size.
int win_x = desc.get_position().left * pixel_ratio;
int win_y = desc.get_position().top * pixel_ratio;
int win_width = desc.get_size().width * pixel_ratio;
int win_height = desc.get_size().height * pixel_ratio;
if (win_width <= 0)
throw Exception("Invalid window width.");
if (win_height <= 0)
throw Exception("Invalid window height.");
// Set values if fullscreen requested.
if (desc.is_fullscreen())
{
win_x = 0;
win_y = 0;
win_width = disp_width_px;
win_height = disp_height_px;
}
// Center window if position supplied is (-1, -1)
if (win_x == -1 && win_y == -1)
{
win_x = (disp_width_px - win_width)/2 - 1;
win_y = (disp_height_px - win_height)/2 - 1;
}
// Set minimum and maximum size
this->resize_allowed = desc.get_allow_resize() || desc.is_fullscreen(); // Fullscreen mode needs a resizable window.
if (resize_allowed)
{
minimum_size = Size(_ResizeMinimumSize_, _ResizeMinimumSize_);
maximum_size = Size(0, 0); // No maximum size by default.
}
else
{
minimum_size = Size(win_width, win_height);
maximum_size = Size(win_width, win_height);
}
// Setup X11 size hints.
this->size_hints = XAllocSizeHints();
if (size_hints == NULL)
throw Exception("Failed to allocate X11 XSizeHints structure.");
size_hints->flags = PMinSize | (resize_allowed ? 0 : PMaxSize);
size_hints->flags |= PResizeInc | PBaseSize | PWinGravity;
// x, y, width, height are obsolete.
size_hints->flags |= USSize | USPosition; // See http://standards.freedesktop.org/wm-spec/wm-spec-latest.html#idm140200472522864
size_hints->min_width = minimum_size.width;
size_hints->min_height = minimum_size.height;
size_hints->max_width = maximum_size.width;
size_hints->max_height = maximum_size.height;
size_hints->width_inc = 1;
size_hints->height_inc = 1;
size_hints->base_width = win_width;
size_hints->base_height = win_height;
size_hints->win_gravity = NorthWestGravity;
// Setup X11 colormap.
//
// The X.Org XServer implementation used on most systems requires that
// a color-map be set for the window. Additionally, windows with a
// different color-depth than its parent must have the border-pixel flag
// set when creating them. Failure to do either will cause XCreateWindow()
// to result in a BadMatch error.
//
// Source: stackoverflow.com/questions/3645632
color_map = XCreateColormap(handle.display, _root_window, visual->visual, AllocNone);
// Static popups are unresizable captionless popup windows.
// These windows should not be decorated.
bool is_static_popup = desc.is_popup() && !desc.has_caption() && !desc.get_allow_resize();
// Tell X11 to perserve graphical content under small popup windows to avoid redraws.
bool save_under = desc.is_popup() && ( (win_width * win_height) < (256 * 256 * pixel_ratio * pixel_ratio) );
// Setup window attributes.
XSetWindowAttributes attr = XSetWindowAttributes {
.background_pixmap = None, /* default */
.background_pixel = 0ul, /* default: undefined */
.border_pixmap = CopyFromParent, /* default */
.border_pixel = 0ul, /* see color_map details above */
.bit_gravity = ForgetGravity, /* default */
.win_gravity = NorthWestGravity, /* default */
.backing_store = NotUseful, /* default */
.backing_planes = -1ul, /* default */
.backing_pixel = 0ul, /* default */
.save_under = save_under ? True : False,
.event_mask = KeyPressMask
| KeyReleaseMask
| ButtonPressMask
| ButtonReleaseMask
| EnterWindowMask
| LeaveWindowMask
| PointerMotionMask
| KeymapStateMask
| ExposureMask
// | VisibilityChangeMask
| StructureNotifyMask
| FocusChangeMask
| PropertyChangeMask ,
.do_not_propagate_mask = NoEventMask, /* default */
.override_redirect = is_static_popup ? True : False,
.colormap = color_map, /* see color_map details above */
.cursor = None /* default; Let X11 handle the cursor for now. */
};
this->system_cursor = XCreateFontCursor(handle.display, XC_left_ptr); // This is allowed to fail
log_event("debug", "clan::X11Window::create(): Creating window...");
log_event("debug", " x%1 y%2 w%3 h%4 b%5 d%6", win_x, win_y, win_width, win_height, border_width, visual->depth);
log_event("debug", " a.su%1, a.od%2", save_under, is_static_popup);
// Create window
handle.window = XCreateWindow(
handle.display, _root_window,
win_x, win_y, win_width, win_height, border_width,
visual->depth, InputOutput, visual->visual,
CWBorderPixel | CWOverrideRedirect | CWSaveUnder | CWEventMask | CWColormap,
&attr
);
if (!handle.window)
throw Exception("Unable to create the X11 window");
if (!desc.get_owner().is_null())
{
DisplayWindow owner = desc.get_owner();
XSetTransientForHint(handle.display, handle.window, owner.get_handle().window);
}
// Setup the hidden cursor (Maybe this should be done only once when required)
char data[64]; // 8x8
memset(data, 0, 64);
XColor black_color;
memset(&black_color, 0, sizeof(black_color));
cursor_bitmap = XCreateBitmapFromData(handle.display, handle.window, data, 8, 8);
hidden_cursor = XCreatePixmapCursor(handle.display, cursor_bitmap, cursor_bitmap, &black_color, &black_color, 0,0);
// Set title of window:
set_title(desc.get_title());
{ // Inform the window manager who we are, so it can kill us if we're not good for its universe.
Atom atom;
int32_t pid = getpid();
if (pid > 0)
{
atom = atoms.get_atom(handle.display, "_NET_WM_PID", False);
XChangeProperty(handle.display, handle.window, atom, XA_CARDINAL, 32, PropModeReplace, (unsigned char *) &pid, 1);
}
char hostname[256];
if (gethostname(hostname, sizeof(hostname)) > -1)
{
hostname[255] = 0;
atom = atoms.get_atom(handle.display, "WM_CLIENT_MACHINE", False);
XChangeProperty(handle.display, handle.window, atom, XA_STRING, 8, PropModeReplace, (unsigned char *) hostname, strlen(hostname));
}
}
// Set-up window type/styling.
// TODO Support more window types, broaden ClanLib window type support, etc.
if (atoms["_NET_WM_WINDOW_TYPE"] != None)
{
Atom type = None;
std::string name;
if (desc.is_dialog())
{
name = "_NET_WM_WINDOW_TYPE_DIALOG";
type = atoms[name];
}
else if (desc.is_popup())
{
if (is_static_popup)
{
name = "_NET_WM_WINDOW_TYPE_TOOLTIP";
type = atoms[name];
}
else if (desc.has_caption()) // A pop-up with title bar -> utility
{
name = "_NET_WM_WINDOW_TYPE_UTILITY";
type = atoms[name];
} // else, a pop-up without a title bar -> popup-menu, combo, dropdown, tooltip, ...
if (type == None) { name = "_NET_WM_WINDOW_TYPE_POPUP_MENU"; type = atoms[name]; }
if (type == None) { name = "_NET_WM_WINDOW_TYPE_COMBO"; type = atoms[name]; }
if (type == None) { name = "_NET_WM_WINDOW_TYPE_DROPDOWN_MENU"; type = atoms[name]; }
} // else if (desc.is_normal())
// Fallback to normal window type if WM doesn't support what we want.
if (type == None) { name = "_NET_WM_WINDOW_TYPE_NORMAL"; type = atoms[name]; }
if (type != None) // Ensure selected type exists.
{
XChangeProperty(handle.display, handle.window, atoms["_NET_WM_WINDOW_TYPE"], XA_ATOM, 32, PropModeReplace, (unsigned char *)&type, 1);
log_event("debug", "clan::X11Window::create(): Creating window of type '%1'.", name);
}
else
{
log_event("debug", "clan::X11Window::create(): Failed to find a suitable window type.");
}
}
else
{
log_event("debug", "clan::X11Window::create(): _NET_WM_WINDOW_TYPE does not exist.");
}
// Set size hints
XSetWMNormalHints(handle.display, handle.window, size_hints);
{ // Subscribe to WM events.
Atom protocol = atoms["WM_DELETE_WINDOW"];
Status result = XSetWMProtocols(handle.display, handle.window, &protocol, 1);
if (result == 0)
log_event("debug", "clan::X11Window::create(): Failed to set WM_PROTOCOLS.");
}
{ // Make auto-repeat keys detectable.
Bool supports_detectable_autorepeat;
XkbSetDetectableAutoRepeat(handle.display, True, &supports_detectable_autorepeat);
}
{ // Make window full-screen if requested.
if (atoms["_NET_WM_STATE"] == None && atoms["_NET_WM_STATE_FULLSCREEN"])
{
fullscreen = false;
log_event("debug", "clan::X11Window: Fullscreen not supported by WM.");
}
else
{
fullscreen = desc.is_fullscreen();
}
if (fullscreen)
{
Atom state = atoms["_NET_WM_STATE_FULLSCREEN"];
XChangeProperty(handle.display, handle.window, atoms["_NET_WM_STATE"], XA_ATOM, 32, PropModeReplace, (unsigned char *)&state, 1);
}
}
update_frame_extents();
auto new_client_area = desc.get_position_client_area() // supplied position is at ? client area : window area;
? Rect::xywh(win_x, win_y, win_width, win_height)
: Rect::xywh(win_x + frame_extents.left, win_y + frame_extents.right, win_width, win_height)
;
process_window_resize(new_client_area);
// Set window visibility
if (desc.is_visible())
{
show(false);
}
// Setup the clipboard
clipboard.setup();
// Go looking for joysticks:
setup_joysticks();
}
void X11Window::update_frame_extents()
{
frame_extents = Rect { border_width, border_width, border_width, border_width };
if (atoms["_NET_FRAME_EXTENTS"] == None)
return;
// Request frame extents from WM.
if (atoms["_NET_REQUEST_FRAME_EXTENTS"] != None)
{
XEvent event;
memset(&event, 0, sizeof(event));
event.type = ClientMessage;
event.xclient.window = handle.window;
event.xclient.format = 32;
event.xclient.message_type = atoms["_NET_REQUEST_FRAME_EXTENTS"];
XSendEvent(handle.display, RootWindow(handle.display, handle.screen), False, SubstructureNotifyMask | SubstructureRedirectMask, &event);
int timer = 10;
while(true)
{
if (timer < 0)
{
log_event("debug", "clan::X11Window: Your window manager has a broken _NET_REQUEST_FRAME_EXTENTS implementation.");
break;
}
if (XCheckMaskEvent(handle.display, PropertyNotify, &event))
{
break;
}
clan::System::sleep(5);
timer--;
}
}
unsigned long item_count;
// _NET_FRAME_EXTENTS, left, right, top, bottom, CARDINAL[4]/32
unsigned char *data = atoms.get_property(handle.window, "_NET_FRAME_EXTENTS", item_count);
if (data == NULL)
return;
if (item_count >= 4)
{
long *cardinal = (long *)data;
frame_extents.left = cardinal[0];
frame_extents.right = cardinal[1];
frame_extents.top = cardinal[2];
frame_extents.bottom = cardinal[3];
}
XFree(data);
}
