Gtk widget
Possible topics include: shortcuts, actions and activation, drag-and-drop, focus handling, or accessibility. It may continue at some point in the future, if there is interest. We’ve reached the end of the prepared material for this series. To read more about input handling in GTK, visit the input handling overview in the GTK documentation. For pointer events, it is the hovered widget under the pointer. In the case of keyboard events, the target widget is the current focus. The unifying principle behind all the different event handlers is that GTK propagates the events it receives from the windowing system from the root of the widget tree to a target widget, and back up again, in a pattern commonly referred to as capture-bubble. We may cover some of these in a later article. Gestures are a bit more involved, since they handle sequences of related events, and generally keep state.Įxamples of much more complex event handlers include things like DND, and keyboard shortcuts. The examples of event handlers in the previous sections are simple and handle only individual events, one at a time. Created by: TLogiviere Hello, Currently running i3wm in a fully working gnome-session(-flashback. Gtk_widget_add_controller() takes ownership of the controller and GTK cleans controllers up automatically when the widget is finalized, so there is nothing more to do. gtkwidgetsetsensitive: assertion 'GTKISWIDGET (widget)' failed. Gtk_widget_add_controller (widget, controller) G_signal_handler_connect (controller, "pressed", Y < gtk_widget_get_height (widget) / 2.0) If (x < gtk_widget_get_width (widget) / 2.0 & GtkWidget *widget = gtk_event_controller_get_widget (controller) GtkEventController *controller = GTK_EVENT_CONTROLLER (gesture) peteroHP173 /GtkClock ls -lrt total 92 -rw-r-r- 1 petero petero 2935 Mar 21 21:39 Clock.glade -rw-r-r- 1 petero petero 8400 Mar 21 21:39 Clock.c -rw-r-r- 1 petero petero 364 Mar 21 21:40 CMakeLists.txt -rw-r-r- 1 petero petero 726 Mar 22 07:58 README -rw-r-r- 1 petero petero 14472 Mar 22 08:05 CMakeCache. For example, there are GtkGestureClick, GtkEventControllerKey, GtkGestureLongPress, and many more.Įvent controllers can be created in ui files, but it is more common to do that in the init() function: static void click_cb (GtkGestureClick *gesture, All of these signals are gone in GTK 4, and instead you are expected to add event controllers to your widget, and listen to their signals. This trend is even stronger in the input area, where we’ve traditionally had a number of signals to handle: ::button-press-event, ::key-press-event, ::touch-event, and so on. In the previous parts, we’ve seen a few examples where handling GtkWidget signals was replaced by some auxiliary objects.
Gtk widget code#
When you want to play with the code it's better to extract the GUIstr stuff to a gtkbuildercairo.ui file and load that (use gtk_builder_add_from_file() rather than gtk_builder_add_from_string() ).(This is the fourth part of a series about custom widgets in GTK 4. In this example the context of the Glade-GUI-file is included in the source code, in order to have all code in single source (easy to list in a single code block). G_object_unref(XML) ' dereference / Referenz abbauen >ĮND 0 ' finish with return code 0 / Ende mit Returncode 0įor me not work also if i insert all dll inside the folder of the script, but other this problem, i see for generate a GUI it use directly xml, by glade, what better things ? with xml dirctly i think is much faster for create a GUI, but exist some compromise ? Gtk_widget_show_all(GTK_WIDGET(window1)) ' Hauptfenster darstellen > Gtk_builder_connect_signals(XML, 0) ' callbacks anbinden > Gtk_style_context_get_color(gtk_widget_get_style_context (widget), _ VAR h = gtk_widget_get_allocated_height(widget) \ 2Ĭairo_arc(cr, w, h, MIN(w, h), 0, 2 * G_PI) VAR w = gtk_widget_get_allocated_width(widget) \ 2 Window1 = gtk_builder_get_object(XML, on_area_draw CDECL ALIAS "on_area_draw" ( _īYVAL user_data AS gpointer) AS gboolean EXPORT IF 0 = gtk_builder_add_from_string(XML, SADD(GUISTR), LEN(GUISTR), THEN ' vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv #INCLUDE "gtk/gtk.bi" ' GTK3+library / GTK3+ Bibliothek ' start GKT / GTK starten > #DEFINE _USE_GTK3_ ' choose GTK version / GTK-version auswaehlen >
Gtk widget license#
' -ĬONST PROJ_MAIL = "ThomasFreiherrnet" ' >ĬONST PROJ_LICE = "GNU General Public License v3" ' >