Gtk Event Queue

) The time frame for these is completely uncertain. GTK is the core of the GNOME development platform, but it can also be used to write applications for other Linux environments, as well as applications. class Inti::Gtk::Widget is declared in the header inti/gtk/widget. main_do_event so the event will behave as if it were in the event queue. Xlib does not provide support for buttons, menus, scrollbars, etc. We will draw simple lines, use fill and stroke operations, we will talk about dashes, line caps and line joins. To receive keyboard events, you: 115 * will need to set the "can-focus" property on the drawing area, and you: 116 * should probably draw some user-visible indication that the drawing: 117 * area is focused. You can vote up the examples you like or vote down the ones you don't like. This package contains top-level subprograms that are used to initialize GtkAda and interact with the main event loop. i an getting the following info. dll assembly to open up the power of System. 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. You just tell them the label you want to see, and they figure out what font to use, draw the button outline and focus rectangle, etc. How do you implement an event queue in C? The problem I had is that events needed pointers to the objects they affect and I do not know any way to check if pointers are actually valid in C. Containers are required to generate expose events for windowless children. If the scene is expensive to draw, remember using cairo clipping functions to improve performance by drawing only what has changed. Another approach, commonly used in GUI systems, employs timer messages that are added to the regular event-queue that your application is servicing. y otherwise. GitHub Gist: instantly share code, notes, and snippets. It has been made much easier with the multi-queue message bank. main_do_event is the highest level. 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. Note that not all systems define the same set of signal names; only those names defined by the system are defined by this module. This way, your widget library can install a CssProvider with the gtk_style_provider_priority_fallback priority in order to provide a default styling for those widgets that need so, and this theming may fully overridden by the user's theme. A backtrace obtained from a core dump follows; if you need any more information, please let me know. Build a Windows batch file that will launch your application directly. Multi-platform toolkit. i an getting the following info. Gets a copy of the first GdkEvent in the display's event queue, without removing the event from the queue. GTK is a toolkit for creating graphical user interfaces. For example when you click a button, a button-click-event notification is sent to the window hosting the button. /ExternalBindings. Issues with web page layout probably go here, while Firefox user interface issues belong in the Firefox product. Xlib does not provide support for buttons, menus, scrollbars, etc. You can probably guess that gtk_widget_intersect() determines the intersection of a rectangle and a child widget. pm Log Message: Finish separating POE::Kernel. We will draw simple lines, use fill and stroke operations, we will talk about dashes, line caps and line joins. Daily news and info about all things Haskell related: practical stuff, theory, types, libraries, jobs, patches, releases, events and conferences and more. (Note that this function will not get more events from the windowing system. It is permitted to call this function multiple times, but is not recommended due to the potential performance impact. The event loop waits for an incoming event: if this event is a key press, the application exits; if it is an expose event, the window content is drawn. GTK Queue Draw Subtle Question Gentle People: I have a rather large project in progress based on the GTK2/Cairo packages. c:3497 msgid "ADDBUTTON , adds a button under the user-list" msgstr "" #: src/common/outbound. Build a Windows batch file that will launch your application directly. I suppose we might be able to bind the panel events and then manually hook them up to the right component, but that still won't give us command events for those controls. Sets the minimum size of a widget; that is, the widget's size request will be at least width by height. mingw-w64-x86_64-clutter A GObject based library for creating fast, visually rich graphical user interfaces (mingw-w64). Multi-threaded Animation with Cairo and GTK+. Report New Bug. Idle functions are mostly useful to queue "one-shot" code, which is run after all events have been handled. accel-closures-changed button-press-event button-release-event can-activate-accel child-notify composited-changed configure-event damage-event delete-event destroy destroy-event direction-changed drag-begin drag-data-delete drag-data-get drag-data-received drag-drop drag-end drag-failed drag-leave drag-motion draw enter-notify-event event event-after focus focus-in-event focus-out-event grab. 2-101-g847f9f4 Powered by Code Browser 1. This function is not useful in the context of CSS-based rendering. Most distributions no longer have a control panel to choose the theme but GNOME Tweaks can be installed to allow changing themes. Note that not all systems define the same set of signal names; only those names defined by the system are defined by this module. GTK+ events and signals In this part of the GTK+ programming tutorial, we will talk about the event system in GTK+ library. This resulted in potential cross-origin information exposure of history through timing side-channel attacks. If there is no callback, a '0' is returned, else the widgetID is returned. The queue() method shows the queue of functions to be executed on the selected elements. This call to the main loop will go on forever until the quit event is placed on the queue. pl] has joined #ubuntu === fishsticks [n=mackenzi@ool-4351bee7. The "flush-on-eos" property "flush-on-eos" gboolean Discard all data in the queue when an EOS event is received, and pass on the EOS event as soon as possible (instead of waiting until all buffers in the queue have been processed, which is the default behaviour). (Note that this function will not get more events from the windowing system. However, sometimes it is useful to learn about lower-level occurrences, such as the mouse being moved, or a key being pressed. The window change event is sent to the event queue as an XConfigureEvent. Gtk Documentation. By the way, if this code looks like giberish to you, then read up on variable arguments and keyword arguments in Python. The queue() method shows the queue of functions to be executed on the selected elements. add_indistream (self, devicename, drawingareawidget). Which brings me to the following question about gtk_widget_queue_draw: For each Menu Function, meaning a C function, which is called by a menu event handle, in response to a Menu Selection. Phoronix: Enlightenment 0. c:3243 src/fe-gtk/plugingui. Draw signals are normally delivered when a drawing area first comes onscreen, or when it’s covered by another window and then uncovered. 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. Package Gtk. However there are some pitfalls, which can cause trouble. 1 seconds to handle a motion event, but the X server queues a new motion event every 0. Nibbles In this part of the Ruby GTK programming tutorial, we will create a Nibbles game clone. y otherwise. The user as a file •1. 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. def on_key_down widget, event key = event. gdk是gtk的下面一层的东西,平常都用gtk的函数,很少直接调用gdk的函数。但是gtk里面的事件、信号、回调、绘制等都和gdk有直接的关系,所以需要把gdk的绘图与事件相关的内容再理一理。. mingw-w64-i686-clutter A GObject based library for creating fast, visually rich graphical user interfaces (mingw-w64). Finally I get the impression that there is no easy and clean solution to my problem. GtkWidget typedef struct { /* The style for the widget. GTK is an event driven toolkit, which means it will sleep in gtk_main until an event occurs and control is passed to the appropriate function. Pidgin has started crashing on me for no apparent reason. The package additionally provides an alternative that works in the @STM@ monad. This was the Nibbles computer game programmed with the GTK library and the Ruby programming language. /cairo-sample Multi-threaded Animation with Cairo and GTK+. Don't synthesize expose events; instead, use Gdk::Window#invalidate to invalidate a region of the window. They are extracted from open source Python projects. Draw signals are normally delivered when a drawing area first comes onscreen, or when it’s covered by another window and then uncovered. There are also some ui bugfixes. Container Widgets 10. For example, "X11 event queue" or "GTK+ repaint idle handler" or whatever it is. This is the gtk-ffi Reference Manual, generated automatically by Declt version 2. procedure Queue_Resize (Widget : access Gtk_Widget_Record); Queue drawing requests after a resizing of the widget. window is NULL. [12:06] jordan huh ? cant i just run edgy ? === ksz [n=ksz@dc43. 7+, Python 3. The following are code examples for showing how to use gtk. 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. I'm a Python developer, so can't really give you the exact code solution. You can vote up the examples you like or vote down the ones you don't like. And costs continue to go down. Banshee can play and import audio CDs and supports many portable media players, including Apple's iPod, Android devices and Creative's ZEN players. c:186 msgid "That plugin is refusing to unload. StatusIcon, so without having to care about it, the app shows an icon in any environment compatible with Gtk. In this part of the GTK+ programming tutorial, we create a custom GTK+ widget. So Gtk::Widget#event is the lowest-level function; it simply emits the "event" and possibly an event-specific signal on a widget. 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. PyGObject, including this documentation, is licensed under the LGPLv2. The applications it supports range from simple Ogg/Vorbis playback, audio/video streaming to complex audio (mixing) and video (non-linear editing) processing. The gtk does not resize immediately, but puts resizes on a queue and resizes later. g_main_loop and g_async_queue. Many widgets, like buttons, do all their drawing themselves. mingw-w64-x86_64-clutter A GObject based library for creating fast, visually rich graphical user interfaces (mingw-w64). , the event may be propagated; if so, this function is used. All that said, you most likely don't want to use any of these functions; synthesizing events is rarely needed. propagate_event calls Gtk::Widget#event on each widget it decides to send the event to. Widgets are usually associated with display and/or layout. This is the widget that is actually used for displaying the latest video frame. They are extracted from open source Python projects. procedure Queue_Resize (Widget : access Gtk_Widget_Record); Queue drawing requests after a resizing of the widget. Thanks for your quick review yesterday :-) I've just attached a new patch using gtk_widget_set_direction as proposed by Martin and it works properly. Nibbles In this part of the Ruby GTK programming tutorial, we will create a Nibbles game clone. James Love Recommended for you. Depending on the queue data, the observer may also emit message_event, finished, or errored signals. I'm not sure if this is also true of GTK, though. And that's it. T to include details like the event type in the source name. pl] has joined #ubuntu === fishsticks [n=mackenzi@ool-4351bee7. The GTK documentation simply states that the left mouse button has number 1, right mouse button number 3. It only checks the events that have already been moved to the GDK event queue. GSourceFuncs. Parse string representing an accelerator and return the key code and the modifier masks. 2-101-g847f9f4 Powered by Code Browser 1. class Inti::Gtk::Widget is declared in the header inti/gtk/widget. Data and other attributes inherited from gtk. GTK+ library is an event driven system. Daily news and info about all things Haskell related: practical stuff, theory, types, libraries, jobs, patches, releases, events and conferences and more. Up-to-date packages built on our servers from upstream source; Installable in any Emacs with 'package. For example, use gdk_window_invalidate_rect() or gtk_widget_queue_draw() instead. The package additionally provides an alternative that works in the @STM@ monad. BUTTONS_CLOSE(). GtkGesture is the base class that simplifies the handling of pointer and touch events, each GtkGesture subclass focuses on recognizing very specific sequences within the stream of events received by the widget, emitting higher-level signals when this happens. " msgstr "" #: src/common/outbound. the maemo gtk patches always turn on extension events, which means the X11 MotionNotify compression (from bug 459532) wasn't actually removing any of the motion events from the queue. class Inti::Gtk::Widget is declared in the header inti/gtk/widget. Issues with web page layout probably go here, while Firefox user interface issues belong in the Firefox product. If an EOS event comes through a srcpad, the associated queue will be considered as 'not-empty' in the queue-size-growing algorithm. gtk-gnutella is a server/client for the Gnutella peer-to-peer network. GStreamer is a library for constructing graphs of media-handling components. 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. For example, if a tablet manufacturer wants to pass pen-based information to its own applications, it can write a DLL that communicates directly to the tablet hardware, obtains the extra information, and saves it in a queue. My way to (try) to do it is like this. All that said, you most likely don't want to use any of these functions; synthesizing events is rarely needed. In my motion_notify_event I just call gtk_widget_queue_draw(GtkWidget) but there is obvious lag behind the actual mouse moving on screen, even if I draw single character it is not aligned with the mouse pointer during the move phase and only catches it after the mouse is stopped. You'll then get a draw signal for the invalid region. /ExternalBindings. Multi-threaded Animation with Cairo and GTK+. 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. I get around 100 crashes a day. 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. My problem is with second "UI Event Test. Issues with web page layout probably go here, while Firefox user interface issues belong in the Firefox product. Thanks for your quick review yesterday :-) I've just attached a new patch using gtk_widget_set_direction as proposed by Martin and it works properly. The Closing event is raised when Close is called, if a window's Close button is clicked, or if the user presses ALT+F4. When you create a handle you need the size. See the API here: Gtk. I'm not great at C programming, or programming in general i suppose, but I'm trying to learn as much and as often as possible. The following are code examples for showing how to use gtk. For example, use gdk_window_invalidate_rect() or gtk_widget_queue_draw() instead. The PeekMessage function can help you examine a message without removing it from its queue before it is dispatched to WindowProc. I think listening for events on only one "eventWidget" is the right thing to do because we don't want Gecko to act on events on the decoration window. They are extracted from open source Python projects. 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. BUTTONS_CLOSE(). For example, use gdk_window_invalidate_rect() or gtk_widget_queue_draw() instead. Internally, SFML tries to hijack the X event queue from the owning window (in your case, owned by GTK). This will cause the server to add a new motion event to the event queue every time the user moves the mouse. I think the way to structure your program is: - have a timeout 60 times a second (every 16ms) - in the timeout, update the variables which control the display for example, you might update the (x, y) positions of some objects - at the end of the timeout function, call gtk_widget_queue_draw() to trigger a repaint - in your expose function, redraw the. Consider asking on the mailing list for better ways to achieve your goals. Draw signals are normally delivered when a drawing area first comes onscreen, or when it's covered by another window and then uncovered. The available routines for drawing are documented on the GDK Drawing Primitives page. Each UI toolkit has its own event queue, and each event queue is processed by a separate thread. The Input events phase is a long stretch of time between each redraw where we get input events from the user and other events (like e. #include struct GtkWidget; enum GtkWidgetFlags; #define GTK_WIDGET_TYPE (wid) #define GTK_WIDGET_STATE (wid) #define GTK_WIDGET_SAVED_STATE (wid) #define GTK_WIDGET_FLAGS (wid) #define GTK_WIDGET_TOPLEVEL (wid) #define GTK_WIDGET_NO_WINDOW (wid) #define GTK_WIDGET_REALIZED (wid) #define GTK_WIDGET_MAPPED (wid) #define GTK_WIDGET. 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. Vimb is modal like the great vim editor and also easily configurable during runtime. Code Browser 1. Finally I get the impression that there is no easy and clean solution to my problem. On failure -1 is returned and errno set appropriately. The event loop waits for an incoming event: if this event is a key press, the application exits; if it is an expose event, the window content is drawn. The core of any animation system is a scheme for periodically changing the display while still remaining responsive to the user. 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. , the event may be propagated; if so, this function is used. We will soon get way behind the users drawing. The GTK signals we have already discussed are for high-level actions, such as a menu item being selected. So, the event data types are defined as follows:. You can also force an expose event by adding to the “damage region” of the drawing area’s window; Gtk. 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. * To receive mouse events on a drawing area, you will need to enable: 114 * them with gtk_widget_add_events(). 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. gdk_event_request_motions () void gdk_event_request_motions (const GdkEventMotion *event);. Set whether the event box window is positioned above the windows of its child, as opposed to below it. GTK+ library is an event driven system. , Gerd Hoffmann , 2015/10/09. The finial statement in the example application invokes the Gtk event loop, Gtk2->main;. Therefore check the Project Server queue that you don't have any jobs in the queue that might block it. For example, one could change the name in the "check" function of a Gtk. Маска события определяет какие события будет получать виджет. This call to the main loop will go on forever until the quit event is placed on the queue. Animation is integral to many parts of GUIs, including both the fancy effects when things change used in window managers, and of course games. x, this->allocation. An element can have several queues. /* 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. Here's the code, the gtk_widget_queue_draw is inside a button-press-event 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. Don't synthesize expose events; instead, use gdk::WindowExt::invalidate_rect to invalidate a region of the window. 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. Internally, SFML tries to hijack the X event queue from the owning window (in your case, owned by GTK). You can vote up the examples you like or vote down the ones you don't like. You'll then get a draw signal for the invalid region. This is the gtk-ffi Reference Manual, generated automatically by Declt version 2. Program asks for file input •4. This function is not useful in the context of CSS-based rendering. All that said, you most likely don't want to use any of these functions; synthesizing events is rarely needed. Program takes control •2. Events which are synchronous (sync events) are treated as if they are in a virtual queue in a first-in-first-out model, ordered by sequence of temporal occurrence with respect to other events, to changes in the DOM, and to user interaction. 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. It was first created in late 70s. So, the event data types are defined as follows:. Threaded applications │ work in a similar manner, except that there is a separate event │ queue for each thread containing a Tcl interpreter. For example, if a tablet manufacturer wants to pass pen-based information to its own applications, it can write a DLL that communicates directly to the tablet hardware, obtains the extra information, and saves it in a queue. Event Handling. But in your clicked event handler it's possible to use the GdkButtonEvent struct for this. The core of any animation system is a scheme for periodically changing the display while still remaining responsive to the user. 22 while surprising E23 has now surfaced. Custom GTK+ widget. My way to (try) to do it is like this. An event is a mechanism via which a class can notify its clients when something happens. Don't synthesize expose events; instead, use Gdk::Window#invalidate to invalidate a region of the window. queue streamiddemux tee typefind valve gstreamer Tracers latencytracer — log processing latency stats leakstracer — detect GstObject and GstMiniObject leaks logtracer — log hook event rusagetracer — log resource usage stats statstracer — log event stats gstreamer Plugins coreelements — GStreamer core elements coretracers. Note that not all systems define the same set of signal names; only those names defined by the system are defined by this module. We only want the state change caused by the event being processed, which is the first XKbStateNotify event, if any. Banshee (media player) Built upon Mono and Gtk#, it uses the GStreamer multimedia platform for encoding and decoding various media formats, including Ogg Vorbis, MP3 and FLAC. Widgets are classes which can listen for and react to user events. __group__ ticket summary component version type severity owner status created _changetime _description _reporter Demuxers 4 DVDNav current time Demuxers master git defect normal new 2005-05-05T21:12:45+02:00 2019-08-11T04:11:47+02:00 "DVDNav module calculates the current time by taking the total time and then uses the block position to approximate the current playing time. Leave events are delivered to the event widget if there was an enter event delivered to it before without the paired leave event. 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. We will draw simple lines, use fill and stroke operations, we will talk about dashes, line caps and line joins. This is the case for e. (There are others, but I am not admitting to the them. {"categories":[{"categoryid":387,"name":"app-accessibility","summary":"The app-accessibility category contains packages which help with accessibility (for example. mingw-w64-x86_64-clutter A GObject based library for creating fast, visually rich graphical user interfaces (mingw-w64). Thus, although this section is entitled "Creating a Widget from Scratch", the Dial widget really began with the source code for the Range widget. So Gtk::Widget#event is the lowest-level function; it simply emits the "event" and possibly an event-specific signal on a widget. Gtk Documentation. The window change event is sent to the event queue as an XConfigureEvent. the maemo gtk patches always turn on extension events, which means the X11 MotionNotify compression (from bug 459532) wasn't actually removing any of the motion events from the queue. Draw signals are normally delivered when a drawing area first comes onscreen, or when it’s covered by another window and then uncovered. You can find a sample with various patterns in the Gtk# distribution in the samples directory as "DrawingSample. It runs on Microsoft Windows, MacOS and every Unix-like system which supports GTK+ (1. This multi-threaded animation is a port of this example to Vala. You can also force an expose event by adding to the “damage region” of the drawing area’s window; Gtk. Thanks for your quick review yesterday :-) I've just attached a new patch using gtk_widget_set_direction as proposed by Martin and it works properly. Hi, Here comes the 3d rendering support for virtio-gpu, together with the support bits in the gtk ui. Here's what you'd learn in this lesson: Will reviews the Callback Queue and Event Loop that concern the execution of asynchronously delayed code. The gtk-ffi Reference Manual. But in your clicked event handler it's possible to use the GdkButtonEvent struct for this. StatusIcon, so without having to care about it, the app shows an icon in any environment compatible with Gtk. Complex animations with cairo and GTK+ can result in a laggy interface. GStreamer is a library for constructing graphs of media-handling components. Builder XML from this class's template data. However, sometimes it is useful to learn about lower-level occurrences, such as the mouse being moved, or a key being pressed. requestPermission() - webkit-gtk, delegating to our NotificationPresenter impl, notifies the UA code using the "notification-request-permission" signal - the UA ask the user and store its answers. We use the Cairo graphics library. net] has joined #ubuntu [12:06] avagant: Thanks anyway. , and it's something that has been holding back various GNOME. 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. GtkDrawable with Cairo example. In some frameworks, threads are allowed to post events to the event queue. PyGObject is a Python package which provides bindings for GObject based libraries such as GTK, GStreamer, WebKitGTK, GLib, GIO and many more. 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. Here is basically the rules this patch tries to implement: - js code request permission to show notifications from the current security domain using webkitNotifications. class Inti::Gtk::Widget is declared in the header inti/gtk/widget. Events are sent and received in the order of their occurrence. You'll then get an expose event for the invalid region. 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. Don't synthesize expose events; instead, use Gdk::Window#invalidate to invalidate a region of the window. We have found a regression that block us to migrate our existing apps from GTK 2. If you do not remember: Core problem is: I have a GtkScrollBar bound to a GtkAdjustemt in a GtkGrid, and I want to call gtk_adjustment_set_upper() and gtk_adjustment_set_value() when the main window is resized. Payable hardware for professionals is capable of 30-bit throughput since quite some years. /cairo-sample Multi-threaded Animation with Cairo and GTK+. udev_queue — access to currently active events udev_hwdb — retrieve properties from the hardware database udev_util — utils. If an EOS event comes through a srcpad, the associated queue will be considered as 'not-empty' in the queue-size-growing algorithm. An event is a message emitted by the X Window System. 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. Implementing a simple event loop in POSIX C I was curious as to how I could go about implementing an event loop in C. If the argument is '1' the GTK-server will update all events in the queue and wait until an event has occured. Call this from an implementation to inform that the renderer has changed such that it needs to redraw. Imagine that it takes us 0. For example, "X11 event queue" or "GTK+ repaint idle handler" or whatever it is. {"categories":[{"categoryid":387,"name":"app-accessibility","summary":"The app-accessibility category contains packages which help with accessibility (for example. I think the both are related. This is the case for e. 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. , Gerd Hoffmann , 2015/10/09. The gtk-ffi Reference Manual. Expose events are normally delivered when a drawing area first comes onscreen, or when it's covered by another window and then uncovered (exposed). * @RLock@: A lock which can be acquired multiple times by the same thread. Note that not all systems define the same set of signal names; only those names defined by the system are defined by this module. Therefore check the Project Server queue that you don't have any jobs in the queue that might block it. Before getting started with Python some of the command line interface (CLI) programs that come with GStreamer are explored. This will cause the server to add a new motion event to the event queue every time the user moves the mouse. Quick Start (pyGTK) The twain module can only be used in an application with a message loop. Gets a copy of the first GdkEvent in the display's event queue, without removing the event from the queue. Multi-platform toolkit. The region here is specified in widget coordinates. Widget: do_button_press_event = do_button_release_event =. If blocking is not an option for your tool because you have permanent interaction -- such as in e. We only want the state change caused by the event being processed, which is the first XKbStateNotify event, if any. Widgets are usually associated with display and/or layout. Drawing in GTK+ Prof. Don't synthesize expose events; instead, use gdk_window_invalidate_rect() to invalidate a region of the window.