Gtk+ Modality Problem
Excuse me for the beginner question, but I am truly stuck on this issue and do not know how to resolve it. My version of gtk is 2.8.18 under Linux 2.6.15-25-686. I have a simple function that behaves like MessageBox under Windows and I am trying to make the messagebox to behave truly modal. To test it I created this other window and I call the messagebox in the delete event to ask if the user would like to exit. I tried: gtk_window_set_modal (GTK_WINDOW(window), TRUE); gtk_grab_add (window); gtk_widget_grab_focus (window); And still I can bring the focus back to my main window. When I generate an event (say click on the close button once more) it is not processed immediately but exactly after the messagebox exits. This approaches my aim, however I would like to force my messagebox into receiving all events (or at least keyboard&mouse) so that nothing goes to the main window. Thanks in advance. Regards, Atanas Atanasov ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Gtk+ Modality Problem
> Don't forget to set the transient window: > > gtk_window_set_transient_for(GTK_WINDOW(window),GTK_WINDOW(parent_window)); I saw this option, but I would like to make the messagebox work independently of the window from which it is called. Is this possible? What I need is exatcly the behaviour of a modal MessageBox under Windows. Atanas ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Gtk+ Modality Problem
I managed to make it partially modal using a combination of functions: set_modal, grab_add and set_transient_for. However I can still say resize the window behind. It seems as you said that this i supposed to be the behaviour since gtk_message_dialow_new creates a dialog with identical functionality. A Windows API person told me that when a window is modal all events except a small set are filtered out for the back window. This small set should definitely include paint and clicks and keyboard should be out of it. Right now since I can resize the window with the mouse, clearly the clicks are not filtered. Is there a way to set such a filter so as to force modality further? Atanas ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Gtk+ Modality Problem
The way ti works under windows: The window manager can distinguish between what is called the client (the inside) and non-client (titlebar & borders) areas a window. Subsequently all mouse events are separated in two classes - normal and NC (non-client). Then the default handlers (through DefWindowProc) for NC events will perform the resizing and these tasks posting specific events that can be handled by the application e.g. WM_SIZE, WM_MOVE. Of course one can add a custom handler for any NC message thus overshadowing the default behaviour. The is also a mechanism that can perform message filtering. Does there exist such a mechanism in Gtk and how can I set it to filter all mouse/keyboard events so that no subsequent resizes etc will propagate? Atanas ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: In gtk+ application,how to parse xml file
In such cases always check GLib. This is most probably the most useful library ever written. If you check the GLib Utilities section of http://developer.gnome.org/doc/API/2.0/glib/index.html you will find there is a simple XML (a subset actually) parser (see http://developer.gnome.org/doc/API/2.0/glib/glib-Simple-XML-Subset-Parser.html). You can also use an INI (key-value) file parser (see http://developer.gnome.org/doc/API/2.0/glib/glib-Key-value-file-parser.html). Atanas ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Gtk+ Modality Problem
I did some experiments with gdk_window_add_filter. First of all there is a GdkWindow associated with every GtkWidget. It can be acquired either by ->window or using gtk_widget_get_parent_window. Then is it not so hard to add an event filter to any particular widget - in my case to the parent window. The filter is, in reality, a function which takes a GdkXEvent and should either translate the message manually to a GdkEvent, or leave the system continue (default translation), or drop it on the floor. First thing I tried is to drop everything on the floor and this made my application "not responding a couple of times". Then I got a printout of the events and after some trying I realised that if I filter event of type 33 (not sure what this means in X style) the WM considers the application "not responding". Even when I filtered everything except type 33, no further modality was achieved. The only explanation I have is that the respective resize, move, etc events are handled on a lower level than Gtk i.e. WM or even X11. Therefore no matter what I do with the events from Gtk, I cannot modify this default behaviour. Even further, this kind of work starts going to specific with respect to platform, display server and window manager - and I would definitely like to avoid that. I guess I will have to leave the issue as it is and go on with my work. Atanas ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
GtkFixed child control resizing
I have a GtkWindow with a single GtkFixedChild. Then all the rest of the interface goes into the GtkFixed with exact positions which I can set through gtk_fixed_put or gtk_fixed_move. Suppose I have a GtkLabel child. I would like to be able to set its size and apply a text alignment through gtk_label_set_justify - for example centered. However I do not see how this can be done since GTK is a layout widget toolkit and one rarely works with specific coordinates in this case. Also I would like to set the vertical alignment of the text. Thanks in advance, Atanas ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: GtkFixed child control resizing
Thanks. The size request worked. However there is an issue. Say I create my label to cover all the GtkFixed and set its text justification to left. What I expect to see is something like: /--\ | | |line 1 is longer | |line2 | | | \--/ but what I see is /--\ | | | line 1 is longer | | line2| | | \--/ It seems that first Gtk computes the required minimum size of the label. Centers a rectangle in the "outer label" and draws my contents be it left justified inside the small minimal size rectangle. Is there a way to change this behaviour? Furthermore how can I achieve vertical alignment? Thanks, Atanas ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Re: GtkFixed child control resizing
Thanks. It worked perfectly. Atanas ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Three state check button
Is there an option that would make a check button have a third state. What I am after is similar to BS_3STATE and BS_AUTO3STATE styles of the BUTTON class in Windows. Any suggestions are welcome. Atanas ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Three state check button
It worked but I would say partially. I tested with a GtkCheckButton and its appearance is a shaded tick. However I cannot see how I can get and set the "third" state. Is the button supposed to change its state automatically as it does with not-inconsistent buttons or I have to receive the pressed and released and change the state accordingly up to my preference. I also have another problem. I would like to know whether the button is pressed at some moment or not. I could not find a function which returns this aspect of the button state. Is there any other solution apart from trapping pressed and released and keeping a flag of the state. Atanas ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Why ? When segmentation fault,there has no "core" file
My best advice is to read the GDB Manual - http://www.gnu.org/software/gdb/documentation/. Chapters 4 and 5 should give you a fairly good idea how to perform simple debugging on your program. If you don't feel like get some GUI debugger like Insight (http://sources.redhat.com/insight/). Atanas ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: How to keep the check button' checked state
You can use the button-press-event and button-release-event signals of GtkWidget (http://developer.gnome.org/doc/API/2.0/gtk/GtkWidget.html#GtkWidget-button-press-event and http://developer.gnome.org/doc/API/2.0/gtk/GtkWidget.html#GtkWidget-button-release-event). By returning TRUE you will bypass the default behaviour and do whatever you like with the button. Eventually you have to use gtk_toggle_button_set_active and gtk_toggle_button_set_inconsistent to set the state of the check button from your code. ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: About gtk_object_set_data()
There are two approaches. The data you set with gtk_object_set_data is simply a gpointer and when the object is destroyed or the data is removed it manages the pointer but not the data (location) it points to. If you eventually would like to perform some freeing when the data is removed use g_object_set_data_full and specify a destroy callback. Atanas ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: I did not know this leak memory or not (gtk_object_set_data)
> > /***/ > guint *p = NULL; > p = g_malloc0(sizeof(guint)): > > gtk_object_set_data(GTK_OBJECT(button),"key",p); > /*/ Why would you allocate the size of a single guint??? If all you want to store is an (unsigned) integer value simply convert it to gpointer and store it straight away. If you need to store a pointer to an array then allocate and specify a destroy callback using g_object_set_data_full and in the function use g_free. Atanas ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: why button is hidden behind drawing area(win32)
As a more general question: How is the drawing order in a GtkFixed determined? Can I control this since I might need it at a later stage of my project. Atanas ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: RADiola, a GTK RAD tool
Hi, I really like the idea. Looks great! The logical editor is a nice idea and it definitely outlines the ease with which the tool can be used. Can I get a sample version to try it? Atanas ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Parent window for other GtkWindow-s
I have a set of GtkWindow-s and I would like to enclose them in a single frame - something very similar to the MDI interface. What widget can I use for the parent frame / window? It is important that the child windows will appear inside the parent window and one will not see them outside its border. Atanas ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: why button is hidden behind drawing area(win32)
I am trying to avoid libgnome and to stick to the pure gtk. Therefore GnomeCanvas is not really a solution. In reality my project is not yet in the stage where I require specific z-order and the problem is not so apparent yet. However I will have to face it one day, sooner or later. I guess the worst case solution in this case would be a custom widget derived from a convinient class. I will let you know what I get to that because right now there are other issues on my mind. I asked since the topic was related to my future work. Atanas ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
GtkWindow show and move
I have a fragment of code similar to this: gtk_widget_show_all (window); gtk_window_resize (window, ...); The problem is that sometimes the specified window starts with the size I set and sometimes it doesn't. This problem occurs in both debug & release versions, and it seems to be completely random. What I know is that before a window is shown the resize function acts differently. It seems that it works well after the window is shown so as such it is a timing issue. If for example I delay for a second between these two lines with g_usleep(100); everything would be fine. How can I solve the problem without introducing any artificial solutions such as delays and the similar? Should I try to purge the message queue running gtk_main_iteration while gtk_main_events_pending? Would it make a difference if I use functions like gtk_widget_request_size and the alike requests? Atanas ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: why button is hidden behind drawing area(win32)
In this case what solution can be used to force the display order? Should one check the code of the respective functions and make a local copy of the code, modifying it as appropriate? I am afraid this will change too quickly and my code might not be compatible with future versions of gtk. Atanas ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: why button is hidden behind drawing area(win32)
> I cant count how many time's I've said this: "widgets do not overlap in gtk+". > > I'm sure that whatever design you want to achieve can be done by > packing widgets into containers normally. > My project is still in an early stage and I have other things to worry about. However I do need overlapping widgets for the simple reason that I am trying to mimic Windows and that's how it works. I understand that from a design point of view this contradicts gtk+ but I will have to figure out some way to make this work. Right now in order to position widgets freely in a window i place a GtkFixed child and make it contain everything. Eventually one solution may be using a different bin widget but I still haven't come across something suitable. Atanas ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: g_queue_find problems
Are you sure that your search key is part of the queue? The issue might be that the your search key is a copy of the string stored in the queue and the pointers won't match. If this is the case try using g_queue_find_custom and wrap strcmp in a simple function. Otherwise you will have to make sure the pointers match. Atanas ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Parent window for other GtkWindow-s
Thanks for the information - it was very useful. If I have any problems I will write back. Atanas ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: GtkWindow show and move
I did the queue purging at a different point - after all widgets are created. This works fine so far. Atanas ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: RADiola, a GTK RAD tool
Maybe I can give some help on RADiola. My suggestion would be to get the bare GUI you have done, compile and release it so that there will be a skeleton. There also is another issue I thought about which is the language support. Excuse me if you wrote something about this already in the documentation released but I did not have time to go through it in detail. My idea was as follows: Since you are aiming at a tool which makes application development easy, I would suggest picking a suitable language (or even a set). Something like python might be quite easy to handle. However the language binding can be done as some sort of plugin which is dynamically loaded. What were the intentions in this direction? Atanas ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: More about RADiola
Why don't you try to set a mailing list at sourceforge - it should be possible. This way we will keep RADiola specific talk there. I like the idea of XML "code" template. It can be a good option to make the code browser fairly portable languagewise. Though we have to discuss this. I have a couple of ideas but it would be better not to flood the gtk mailing list anymore. See what you can do and post us a link here please. Atanas ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Label problem under Win32
I have a small GTK+ application for Linux and recently ported it for Windows (2000). However I am experiencing one problem - the text in all label is white instead of black. I do not have any fancy themes or appearance tweaks. More interestingly the mnemonics show in black i.e. if I have a button with text "_Cancel" the underline would be black but none of the text. Is there some setting which affects this because I do not want to force the color? Atanas ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Allow a GtkWindow to prevent losing focus
I have been trying to do something similar - the behaviour of modal windows under Windows. However this solution seemed too fragile because you never know what window manager will be running beneath. After all most of these functions just pass on hints to the window manager, and the behaviour depends on it completely. Therefore if you REALLY need this sort of thing you may need to fix your project on a specific WM and start doing some not so nice things as trapping XEvents globally and the alike. Mind you that I did not go into detail because it was not so crucial and I did not want to make the interface dull. Atanas ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
