gobject

问题 I have a GObject "A" which creates an instance of another GObject "B" in its constructor. The "B" object needs to be passed several construction-only properties. Now when creating an instance of object "A" I want to allow passing values for these properties through the constructor of object "A" on to the constructor of object "B". The only way I have found to do that was to create identical properties for object "A" and pass their values on to the constructor of "B". These properties would

问题 I have an array stored as a GVariant of type a(ss) in GSettings, that I want to use in a Cinnamon Applet. I can retrieve the value successfully using the following code: let schema = schema_source.lookup(SCHEMA_NAME, false); let settings = new Gio.Settings({ settings_schema: schema }); let my_value = settings.get_value('myvalue'); but I can't unpack it. As far as I can see, I will probably need to unpack it using a GVariantIter structure, but the documentation is limited, and I can't find the

问题 I was kindly directed to use GObject's "add_emission_hook" following a recent question on SO but I can't seem to find a usage example. Does anyone have one to share, please? 回答1: After a discussion with helpful folks on IRC #pygtk, here is what I came up with: import gobject class Signals(gobject.GObject): __gsignals__ = { "lastfm_username_changed": (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE, (gobject.TYPE_STRING,)) #@UndefinedVariable } def __init__(self): gobject.GObject.__init__(self)

问题 I’m trying to create a custom audio sink plugin for gstreamer using the Gst::AudioSink as a base class. For me this involves multiple learning curves as I’m new to gstreamer, gstreamermm and gobject. Also I have no background or real interest in gtkmm as I’m not working on GUI code at present. I am trying to create a class along the lines of: class MyAudioSink: public Gst::AudioSink { public: explicit MyAudioSink(KantarAudioSink *gobj); virtual ~MyAudioSink(); static void class_init(Gst:

问题 I've a problem: my main thread should start and join a thread that has a to run about 10-15 seconds. So: my main thread starts a child thread , whom has to run about 10-15 seconds my main thread joins the child thread : the main thread needs the result of the child thread in the meanwhile the child thread runs, i've to update the GUI , it is just a progressbar (possibly every 0.2 second) updating the GUI: i'll use a recursive function the child thread finishes and the main thread gets the

问题 The Wiki page of the old PyGTK 2.8 binding states that an object properly written in Python should also be easily usable from C code, or even other language bindings. But PyGTK is outdated and should be replaced by PyGObject. Is it possible to mix and match languages with the newer introspection-based binding, too? For example, can I write a gobject class in Vala, extend it with Python and use the result in Java? 回答1: I've written a C based plugin library that does essentially this. It does

问题 I try to stop a gobject.MainLoop() after a few seconds. I don't know if it's possible to set a timeout to this kind of loop, it would be perfect but I have not found that. So, I tried to workaround this with threading but unfortunately, the main loop block others threads. Here my code (I'm working with python 2.7): import MediaCenter_dbusConfig import dbus import gobject from dbus.mainloop.glib import DBusGMainLoop from time import sleep from threading import Thread mainloop=0 class Timeout

问题 I can't seem to get cairo regions working in within using the gintrospection. For example from gi.repository import cairo reg = cairo.Region() will give me Traceback (most recent call last): File "<stdin>", line 1, in <module> MemoryError and trying to get a region from Gdk.get_clip_region() will give me return info.invoke(*args) TypeError: Couldn't find conversion for foreign struct 'cairo.Region' What obvious thing am I missing? I can't find a way to iniatilize the library, and can't

问题 Is there a way, using the Gtk library in C, to clone a Gtk button (for instance), and pack it somewhere else in the app. I know you can't pack the same widget twice. And that this code obviously wouldn't work, but shows what happens when I attempt a shallow copy of the button: GtkButton *a = g_object_new(GTK_TYPE_BUTTON, "label", "o_0", NULL); GtkButton *b = g_memdup(a, sizeof *a); gtk_box_pack_start_defaults(GTK_BOX(vbox), GTK_WIDGET(b)); There is surrounding code which creates a vbox and

问题 On compiling GOBJECT in Visual Studio, I came across below two errors: Error 5 error LNK1120: 1 unresolved externals C:\gtk_compilation\glib\glib-2.46.0\build\win32\vs12\Debug\Win32\bin\gobject-2-vs12.dll gobject Error 4 error LNK2019: unresolved external symbol ___chkstk_ms referenced in function _ffi_call C:\gtk_compilation\glib\glib-2.46.0\build\win32\vs12\libffi.lib(ffi.o) gobject I recompiled the libffi using the procedure described here but with extra flags given to ./configure like