Gtk Event Queue

This was the Nibbles computer game programmed with the GTK library and the Ruby programming language. How hard to build a PDF Viewer? A month a ago i was searching for a good PDF viewer that allow me to browse my PDF fasters that adobe reader and evince which i think not very stable for large PDFs. It runs on Microsoft Windows, MacOS and every Unix-like system which supports GTK+ (1. There are also GTK signals corresponding to these low-level events. This will cause the server to add a new motion event to the event queue every time the user moves the mouse. Hi, Is there a way to have the main loop react upon a message becoming available from a different thread on an asynchronous queue? I'm having a main loop which is. This is complicated by the fact that GTK wants to be in charge of events and all that so any basic code is likely run from within a GTK call-back. GLArea is a widget that allows drawing with OpenGL. File provides input The user is abstracted as a file (named STDIN ). A backtrace obtained from a core dump follows; if you need any more information, please let me know. All instances of gtk_main() are functionally identical; they are all watching the same connection to the X server and working from the same event queue. This section describes functions dealing with events from the window system. internetdsl. The following are code examples for showing how to use gtk. Leave events are delivered to the event widget if there was an enter event delivered to it before without the paired leave event. I'm trying to embed an SDL_Window into my own application. (window is a GtkWindow) void. For example, one could change the name in the "check" function of a Gtk. gtk_propagate_event() is a bit higher-level, and gtk_main_do_event() is the highest level. GLib is a lower-level library that provides many useful definitions and functions available for use when creating GDK and GTK applications. The thread that happens to run the event loop is said to "own" Gtk. Events are read and queued on the appropriate event queues. Any blobs with the extension. 7+, Python 3. gtk_propagate_event() is a bit higher-level, and gtk_main_do_event() is the highest level. My way to (try) to do it is like this. I don't really care if this code is a C function, GTK object method or whatever. Appends a copy of the given event onto the front of the event queue for event->any. Looking on the documentation of GdkPixbuf I found I could use the following which however gives me a segmentation fault in my program. I've used GTK under Python, and while it's slower than native Windows UI, it's more than acceptable for GIMP. If you want to synthesize an event though, don’t use this function; instead, use gtk_main_do_event so the event will behave as if it were in the event queue. This is a small focused event to address the scalability problems in GtkListBox and GtkFlowBox. The gtk does not resize immediately, but puts resizes on a queue and resizes later. Swing has similar restrictions though they are not as strictly enforced. There are almost certainly better ways to achieve your goals. This is not working. The Gtk::DrawingArea widget is used for creating custom user interface elements. Expose events are normally delivered when a drawing area first comes onscreen, or when it's covered by another window and then uncovered (exposed). 1 maintenance builds as well as 3. Quod Libet (software) Quod Libet is a cross-platform free and open-source audio player, tag editor and library organizer. The PeekMessage function can help you examine a message without removing it from its queue before it is dispatched to WindowProc. * * Copyright (C) 1999 Red Hat Software * * This library is free. Threaded applications │ work in a similar manner, except that there is a separate event │ queue for each thread containing a Tcl interpreter. Rarely-used function. If you wish to change the way a widget renders its background you should use a custom CSS style, through an application-specific StyleProvider and a CSS style class. 5+, PyPy and PyPy3. The gtk does not resize immediately, but puts resizes on a queue and resizes later. GitHub Gist: instantly share code, notes, and snippets. CRM Customer Service Customer Experience Point of Sale Lead Management Event when compiling gtk-gnutella. Multi-threaded Animation with Cairo and GTK+. Android Studio - How to fix "Emulator: ##KBD: Full queue, lose event" error? November 16, 2018. Presenting content in lists or grids is critical for many use-cases — instant messaging clients, feed reeders, email clients, file managers, photo and music applications, etc. Because of this, they cannot receive events and if they are incorrectly sized, they don't clip so you can get messy overwriting, etc. The event queue is a list of events that need to be executed. And costs continue to go down. GStreamer is a library for constructing graphs of media-handling components. The names can help you avoid confusion over which way is true and which is false. Hi, Here comes the 3d rendering support for virtio-gpu, together with the support bits in the gtk ui. ",zorglub 537,Option to describe VOD streams on first request,Core: VLM,,Features paradize,enhancement,normal,,new,2006-02-06T11:42:50+01:00,2010-06-16T23:09:14+02:00,"So we can avoid putting a hog on VLC when we first start a streamer with many streams. on 64bit LTS18. GutterRenderer::queue-draw signal of the renderer. bryce likes sommer ray. If an owned window was opened by its owner window using Show, and the owner window is closed, the owned window's Closing event is not raised. Call this from an implementation to inform that the renderer has changed such that it needs to redraw. This is a small focused event to address the scalability problems in GtkListBox and GtkFlowBox. The event queue is a list of events that need to be executed. queue_draw_area and Gdk. Connects a Gtk. T to include details like the event type in the source name. I thought that it is possible to use Flush Event Queue Function to clear unhandled event, but without registering dynamic events for string and bool controls. Program takes control •2. Events may be dispatched either synchronously or asynchronously. Pidgin has started crashing on me for no apparent reason. An event is a message emitted by the X Window System. You'll then get an expose event for the invalid region. It's the role of 'libp2p' to glue this together, handle the list of available servers, the message queue, verifying nobody is cheating, and so on. In that case, say Linux/GTK the mouse event will be seen by the underlying panel. * the reorder queues in the meantime, we will be called again * from the timer function if no one else cares for it. Using GLFW. In the idle callback I use regex matching to find the interesting events and update the GUI accordingly. It would be racy if more than one XKbStateNotify event were considered. PyGObject, including this documentation, is licensed under the LGPLv2. All that said, you most likely don't want to use any of these functions; synthesizing events is rarely needed. I think the both are related. You can vote up the examples you like or vote down the ones you don't like. Contribute to GNOME/gtk development by creating an account on GitHub. In this tutorial, learn how to use the GLib collection data structures to effectively manage data within C programs. Program takes control •2. My idea here was to create two gtk_drawing_area and two cairo surface objects, which should follow parallel drawing function calls at regular intervals. Once you changed these values, you just invalidate the drawing area to force it being redrawn, calling gtk_widget_queue_draw on the drawing area. Drawing to your new application, or to port your existing custom controls to Gtk. Just as all land animals are just variants on the first amphibian that crawled up out of the mud, GTK widgets tend to start off as variants of some other, previously written widget. A handler for a particular signal, once set, remains installed until it is explicitly reset (Python emulates the BSD style interface regardless of the underlying implementation), with the exception of the handler for SIGCHLD, which follows the underlying implementation. They are extracted from open source Python projects. basic touch test using gtk and touch events. The GTK documentation simply states that the left mouse button has number 1, right mouse button number 3. This is an abstract base class, and may not be instantiated. /* GTK - The GIMP Toolkit * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald * * This library is free software; you can redistribute it and/or. Widget: do_button_press_event = do_button_release_event =. The main issue is that the objects an event data structure points two might be removed before the event is executed. Quick Start (pyGTK) The twain module can only be used in an application with a message loop. In GTK+ applications the events are handled automatically in gtk_main_do_event and passed on to the appropriate widgets, so these functions are rarely needed. Thus, although this section is entitled "Creating a Widget from Scratch", the Dial widget really began with the source code for the Range widget. Each event in this virtual queue is. It has something to do with module named axi. This function is not useful in the context of CSS-based rendering. A handler for a particular signal, once set, remains installed until it is explicitly reset (Python emulates the BSD style interface regardless of the underlying implementation), with the exception of the handler for SIGCHLD, which follows the underlying implementation. Draw signals are normally delivered when a drawing area first comes onscreen, or when it's covered by another window and then uncovered. Expose events are normally delivered when a drawing area first comes onscreen, or when it's covered by another window and then uncovered (exposed). However there are some pitfalls, which can cause trouble. This means even budget setups are possible with this kind of gear. You'll then get an expose event for the invalid region. on_key_down event end We catch the key press events and delegate the processing to the on_key_down method of the board class. The following are code examples for showing how to use gtk. Program takes control •2. It encapsulates asynchronous event dispatch machinery which extracts events from the queue and dispatches them by calling dispatchEvent(AWTEvent) method on this EventQueue with the event to be dispatched as. See the API here: Gtk. Threaded applications │ work in a similar manner, except that there is a separate event │ queue for each thread containing a Tcl interpreter. 22 while surprising E23 has now surfaced. Queue() and poll the state of the thread from your main loop using a timer. The Unix man page for ' signal() ' lists the existing signals (on some systems this is signal(2), on others the list is in signal(7)). Again, gtk_idle_remove() should not be called from within an idle function, because it will corrupt GTK+'s idle function list. Events which directly relate to the visual representation of the event widget. Draw signals are normally delivered when a drawing area first comes onscreen, or when it's covered by another window and then uncovered. 23 Released With Massive Wayland Improvements It has been almost two years since the release of Enlightenment 0. This already works for TCustomGroupBox and descendants. class Inti::Gtk::Widget is declared in the header inti/gtk/widget. 0 cairo-sample. mingw-w64-x86_64-clutter A GObject based library for creating fast, visually rich graphical user interfaces (mingw-w64). Swing/SWT integration has important threading implications. If you do not want to upgrade your GTK to a fixed version, you can make use of the org. Queue Draw does not always call expose signal. + * Ensure reorder_objects is read after pd->lock is dropped so we see. Widget coordinates are a bit odd; for historical reasons, they are defined as this->window coordinates for widgets that return true for get_has_window, and are relative to this->allocation. You can also force an expose event by adding to the "damage region" of the drawing area's window; gtk-widget-queue-draw-area and gdk-window-invalidate-rect are equally good ways to do this. Since Amazon SimpleDB allows you to completely offload the work required to run a production database, many developers find it an ideal, low-touch data store for logging information about conditions or events, status updates, recurring activities, workflow processes, or device and application states. 4 patchlevel 1 "Will Decker" on Mon Jul 29 14:37:50 2019 GMT+0. * the reorder queues in the meantime, we will be called again * from the timer function if no one else cares for it. gdk_event_request_motions () void gdk_event_request_motions (const GdkEventMotion *event);. main() function, which serves to prevent your application from halting as soon as it has set up the GUI, and. While building and Running the Android Projects, you may see the. Learn how to handle "Signals" in the PHP-GTK library. A more proper fix for this is to get the events from gdk, not from Xlib, since gdk will take care of all the extension events for us, and map them to. All that said, you most likely don't want to use any of these functions; synthesizing events is rarely needed. Appends a copy of the given event onto the front of the event queue for event->any. Messages are dequeued from the queue and dispatched to whatever entity was the designated receiver, so a message queue, or event queue, decouples the sender and receiver of a message both locally and in time. This section describes functions dealing with events from the window system. DrawingArea to an INDI device. Widgets are classes which can listen for and react to user events. propagate_event is a bit higher-level, and Gtk. Uzu Uzu is a static site generator with built-in web server, file modification watcher, live reload, i18n, themes, multi-page support, inject external data via local Perl 6 module. If there is no callback, a '0' is returned, else the widgetID is returned. 5+, PyPy and PyPy3. I suppose we could use the mouseUp for command as long as we the mouse event binding right. rotor is event loop friendly C++ actor micro framework. The problem is that the GStreamer pipeline don't free properly when the window's exit button was pressed: it can be fixed using a quit function that frees the pipeline prior to close the GTK main loop. Swing/SWT integration has important threading implications. Don't synthesize expose events; instead, use gdk_window_invalidate_rect() to invalidate a region of the window. Looking on the documentation of GdkPixbuf I found I could use the following which however gives me a segmentation fault in my program. You can find the OpenGL bindings for Vala on. Also with GTK+ >= 3. Paul Pogonyshev wrote: Russell Shaw wrote: I'm trying to figure out how to wake up the main gtk gui thread when new data is available in a GAsyncQueue (command_queue), so that i can display the data in a gtk widget:. GLContext for the window it creates, and creates a custom GL framebuffer that the widget will do GL rendering onto. I would like, for nothing more, then just compatablity and to show off the greatness of GTK# working with you to make it happen. Don't synthesize expose events; instead, use gdk::WindowExt::invalidate_rect to invalidate a region of the window. An event queue stores messages in a first-in, first-out order (fifo). on_popup_queue_browse_host_activate (GtkMenuItem *unused_menuitem, gpointer unused_udata) Initiates a browse host request to the currently selected host. If your widget is only to show application output, then you're done at this point and can ship it. Each UI toolkit has its own event queue, and each event queue is processed by a separate thread. Description This section describes functions dealing with events from the window system. Shared components used by Firefox and other Mozilla software, including handling of Web content; Gecko, HTML, CSS, layout, DOM, scripts, images, networking, etc. You can vote up the examples you like or vote down the ones you don't like. Program takes control •2. It is immediately closing because of unhandled "ok button" value change event. When a fraction is read from the queue, the observing thread emits an "updated" signal. All GUI applications are event driven. All that said, you most likely don't. In this part of the GTK+ programming tutorial, we create a custom GTK+ widget. Nibbles In this part of the Ruby GTK programming tutorial, we will create a Nibbles game clone. The user as a file •1. I'm trying to embed an SDL_Window into my own application. Widgets are usually associated with display and/or layout. on 64bit LTS18. Upon receipt of a message, one or more message-handling routines are called. T to include details like the event type in the source name. Appends a copy of the given event onto the front of the event queue for event->any. For example, use gdk_window_invalidate_rect() or gtk_widget_queue. gtk_main_level() returns the level of recursion; that is, it returns 0 if no gtk_main() is on the stack, 1 if one gtk_main() is running, etc. Call this from an implementation to inform that the renderer has changed such that it needs to redraw. It doesn't have to be complicated, nor do it have to be extremely super-efficient, and it's not for production code (if so I would use libuv or something), it's for educational purposes, so I won't be depending on third party. Some event are preconfigured, other events have to be added to the event mask. You can also force an expose event by adding to the "damage region" of the drawing area's window; gtk_widget_queue_draw_area() and gdk_window_invalidate_rect() are equally good ways to do this. We have found a regression that block us to migrate our existing apps from GTK 2. [xcb] Unknown sequence number while processing queue [xcb] Most likely this is a multi-threaded client and XInitThreads has not been called [xcb] Aborting, sorry about that. So, the event data types are defined as follows:. So Gtk::Widget#event is the lowest-level function; it simply emits the "event" and possibly an event-specific signal on a widget. We use cookies for various purposes including analytics. def on_key_down widget, event key = event. 10 (20120208), it seems there is a memory leak in g_idle_add() use or something related to queue_draw(), anyway the following code (that I think is correct) do not leak in linux (ubuntu 12. The queue() method shows the queue of functions to be executed on the selected elements. You can vote up the examples you like or vote down the ones you don't like. Expose events are normally delivered when a drawing area first comes onscreen, or when it's covered by another window and then uncovered (exposed). Program does something •3. However there are some pitfalls, which can cause trouble. , Gecko#, Gtksourceview#, GSF#, Guile#,. 2 or above). {"categories":[{"categoryid":387,"name":"app-accessibility","summary":"The app-accessibility category contains packages which help with accessibility (for example. Pidgin has started crashing on me for no apparent reason. And that's it. Connects a Gtk. Inside the GTK# libraries. GtkWidget typedef struct { /* The style for the widget. The proposal is to use the query-tooltip signal to handle it. 9 Generator usage only permitted with license. widget: a GtkWidget event: an event See Also See the GLib manual, especially GMainLoop and signal-related functions such as g_signal_connect(). StatusIcon detect the presence of applets and implemented a fallback mechanism to guarantee this works in other desktops. [email protected]:~$ sudo software-center Traceback (most recent call last): File "/usr/bin/software-center", line 34, in import gtk ImportError: No module named gtk Any guesses how to fix this. GitHub Gist: instantly share code, notes, and snippets. GPT - GTK printing queue for CUPS | Support for GPT - GTK printing queue for CUPS at SourceForge. Payable hardware for professionals is capable of 30-bit throughput since quite some years. It is pretty easy to install openSUSE Linux on a MacBook as operating system. Join GitHub today. Check the comments in the bug 15793 for more information about the current solution. Most often it has only one, the "fx" queue, which is the default jQuery queue. Use gtk_widget_queue_draw() to update the drawing area which indicates whether a fax is in the "faxes to send" queue via an expose event rather than doing it directly. It would be racy if more than one XKbStateNotify event were considered. However, sometimes it is useful to learn about lower-level occurrences, such as the mouse being moved, or a key being pressed. [xcb] Unknown sequence number while processing queue [xcb] Most likely this is a multi-threaded client and XInitThreads has not been called [xcb] Aborting, sorry about that. Another part of GTK+ takes signals from the top of the queue, one at a time, and runs whatever callback functions are registered with the signal or event before moving to the next item in the queue. You can also force an expose event by adding to the “damage region” of the drawing area’s window; Gtk. Call this from an implementation to inform that the renderer has changed such that it needs to redraw. The first invalidation will start the "frame clock"; this clock is an object that keeps track of each phase inside a frame, like painting windows, laying out widgets, or processing the event queue. Sets the minimum size of a widget; that is, the widget's size request will be at least width by height. This function is the main loop that takes control and starts processing events. Vimb is modal like the great vim editor and also easily configurable during runtime. Stewart Weiss Hierarchical Drawing With this understanding, we can direct our attention to describing the sequence of steps that take place when GTK receives the exposure event. pm Log Message: Finish separating POE::Kernel. StatusIcon, so without having to care about it, the app shows an icon in any environment compatible with Gtk. , Gerd Hoffmann , 2015/10/09. Some event are preconfigured, other events have to be added to the event mask. All instances of gtk_main() are functionally identical; they are all watching the same connection to the X server and working from the same event queue. GTK+ monitors GDK's event queue; for each event received, it decides which widget (if any) should receive the event. Here's the code, the gtk_widget_queue_draw is inside a button-press-event callback. Before getting started with Python some of the command line interface (CLI) programs that come with GStreamer are explored. gtk_widget_add_events(GTK_WIDGET(window), GDK_CONFIGURE); The event mask of the widget determines what kind of events will a particular widget receive. DrawingArea to an INDI device. Adjustment s used for controlling the range). This is the widget that is actually used for displaying the latest video frame. In this case, you could split your program into two threads: have a background thread which updates the variables every 16ms, and a foreground thread which repaints the screen as quickly as it can. The following are code examples for showing how to use gtk. So i asked how hard to build a PDF viewer?, i found epdfviewer which is simple minimal PDF viewer, but i had some crashes when using it. I'm a Python developer, so can't really give you the exact code solution. The GNOME desktop environment is not required. Using this technique, your main thread (which is usually the only thread allow to use GUI elements) can pop up the dialog. Xlib does not provide support for buttons, menus, scrollbars, etc. 3) Non-linked srcpads graceful handling In order to better support dynamic switching between streams, the multiqueue (unlike the current GStreamer queue) continues to push buffers on non-linked pads rather than. The region here is specified in widget coordinates. You can also force an expose event by adding to the “damage region” of the drawing area’s window; gtk_widget_queue_draw_area() and gdk_window_invalidate_rect() are equally good ways to do this. Figure: Nibbles. g_main_loop and g_async_queue. onWidgetButtonPressEvent myWidget $ \ eventButton-> do. forcing a a widget_queue_draw - Adrian E. If the GTK-server is compiled as a standalone binary, it allows five different interfaces: stdin, fifo , ipc (message queue), tcp or udp. The calling process creates a thread to listen for any data being placed on the queue. I want one clock to go forward while the other goes backwards simultaneously. Showing a message dialog from a thread using GTK. gtk_main_level() returns the level of recursion; that is, it returns 0 if no gtk_main() is on the stack, 1 if one gtk_main() is running, etc. Besides being generally useful they can help you find and try out what you need in a very fast and convenient way without writing a bit of code. This call to the main loop will go on forever until the quit event is placed on the queue. Add a clear request to the event queue for part of the widget. z being received for this device will be drawn into drawingareawidget, any indinumbervector objects received for this device and a who's name property matches IMAGE_SIZE will be used in order to set the parameters of the stream. procedure Queue_Resize (Widget : access Gtk_Widget_Record); Queue drawing requests after a resizing of the widget. If you want to synthesize an event though, don't use this function; instead, use gtk_main_do_event() so the event will behave as if it were in the event queue. On failure -1 is returned and errno set appropriately. Package Gtk. All that said, you most likely don't want to use any of these functions; synthesizing events is rarely needed. Finally, events on given event queue are dispatched. It is pretty easy to install openSUSE Linux on a MacBook as operating system. You can also force an expose event by adding to the "damage region" of the drawing area's window; gtk_widget_queue_draw_area() and gdk_window_invalidate_rect() are equally good ways to do this. Generated on 2016-Jun-16 from project gtk revision 3. My way to (try) to do it is like this. Imagine that it takes us 0. public void set_visible_window ( bool visible_window) Set whether the event box uses a visible or invisible child window. invalidate_rect are equally good ways to do this. MELPA (Milkypostman’s Emacs Lisp Package Archive). While building and Running the Android Projects, you may see the. c:3238 msgid "No such plugin found. They are extracted from open source Python projects. gtk_widget_queue_draw() function, also tried to open a blank window and render the image only when the button is pressed, the program just crashes or does nothing. Animations and Full Screen. There are also some ui bugfixes. StatusIcon detect the presence of applets and implemented a fallback mechanism to guarantee this works in other desktops. The style contains the * colors the widget should be drawn in for each state * along with graphics contexts used to draw with and * the font to use for text. Writing a Custom Widget Using PyGTK One of the things that I wanted to add to my simple PyWine application was an easy way for people to rate their wine. set_events(Gdk. Try the following ONLY AFTER DOING A Backup of the Registry Keys: Try to connect with a UDL file to the SQL Server using the credentials that are starting the Project Queue Service. GPT - GTK printing queue for CUPS | Support for GPT - GTK printing queue for CUPS at SourceForge. It can also trigger a number of assertions. The commands are put into a python Queue, and the threads send their results to the mainloop using an idle callback. If an owned window was opened by its owner window using Show, and the owner window is closed, the owned window's Closing event is not raised. There were lots of different ways to do it but since I was looking for a tutorial to write I decided that I wanted to do it the way that you rate songs in iTunes. , Gecko#, Gtksourceview#, GSF#, Guile#,. Event Type: Information. a GdkEvent. The GNOME desktop environment is not required. It supports Linux, Windows and macOS and works with Python 2. c:3512 msgid "ADDBUTTON , adds a button under the user-list" msgstr "" #: src/common/outbound. It may not be perfectly smooth, since the gtk timeout functions are not really right for realtime work. Description. Create click listeners for your desktop application. Drag events are not redirected because it is unclear what the semantics of that would be. The queue() method can be used together with the dequeue() method. PHP GTK Tutorials & Examples In this blog, you will learn the basics of GUI programming in GTK with PHP language. The 'libcli' and 'libsrv' contain network client and server code, implementing the various protocols in dynamically loadable sub-modules. SDL_WINDOWID: embedding SDL into gtkmm. All instances of gtk_main() are functionally identical; they are all watching the same connection to the X server and working from the same event queue. I'm on Debian sid, 64-bit, using Awesome as my WM. Events which directly relate to the visual representation of the event widget. This section describes functions dealing with events from the window system. This means even budget setups are possible with this kind of gear. sdl2 is expected to follow shortly, once we've pinned down one remaining display issue, so it'll be there for 2. * * Copyright (C) 1999 Red Hat Software * * This library is free. I think gtk_grab_add() can be called on the mContainer instead of mShell if the key event signal handlers return TRUE to avoid bug 707623. In addition to setting up GTK for usage, a pointer to a slice of strings may be passed in to parse standard GTK command line arguments. on_key_down event end We catch the key press events and delegate the processing to the on_key_down method of the board class. I'm trying to create a program that takes input from an external device and generates mouse clicks so that GTK+ will get and handle the events as if they mouse click happened normally. A: There is a bug in some versions of GTK that causes certain print backends to hang. Feiguin Re: forcing a a widget_queue_draw - Tristan Van Berkom Re: forcing a a widget_queue_draw - Adrian E. Set whether the event box window is positioned above the windows of its child, as opposed to below it. Call this from an implementation to inform that the renderer has changed such that it needs to redraw. Android Studio - How to fix "Emulator: ##KBD: Full queue, lose event" error? November 16, 2018. It turns out, however, that there is a problem with just specifying Gdk::POINTER_MOTION_MASK. We have found a regression that block us to migrate our existing apps from GTK 2. GutterRenderer::queue-draw signal of the renderer. T to include details like the event type in the source name. gdk_event_request_motions () void gdk_event_request_motions (const GdkEventMotion *event);. There is probably an event mechanism for this but in the mean time you could: Use one of the "thread-safe" mechanisms provided by the threading module (like Event()) or a Queue. GTK toolkit for Betsy (master) and Mint 17. All GUI applications are event driven. I'm on Debian sid, 64-bit, using Awesome as my WM. The function XNextEvent(3) returns the next event of the X server's event queue and it blocks if the queue is empty. Program asks for file input •4. If the given event queue is empty, this function blocks until there are events to be read from the display fd. Gets a copy of the first GdkEvent in the display's event queue, without removing the event from the queue. Android Studio - How to fix "Emulator: ##KBD: Full queue, lose event" error? November 16, 2018. The gtk-ffi Reference Manual. gtk_propagate_event() is a bit higher-level, and gtk_main_do_event() is the highest level. Report New Bug. Inside the GTK# libraries. gdk_event_request_motions () void gdk_event_request_motions (const GdkEventMotion *event);. GTK+ is a system that relies on events, signals, and callbacks. Note that “no window” widgets (which have the gtk_no_window flag set) draw on their parent container’s window and thus may not draw any background themselves. In this scenario, messages are "pushed" to multiple subscribers, which eliminates the need to periodically check or poll for updates and enables parallel asynchronous processing of the message by the subscribers. The PeekMessage function can help you examine a message without removing it from its queue before it is dispatched to WindowProc. /* Pango * viewer. See gdk_display_put_event().