Is it Gtk2 or Gtk3, which version exactly?
Il giorno mar 18 dic 2018 alle ore 18:47 Mitko Haralanov via gtk-list < gtk-list@gnome.org> ha scritto: > I mistakenly replied only to Luca!! Forwarding to the list. > > (Sorry, Luca, my bad) > - Mitko > > ---------- Forwarded message --------- > From: Mitko Haralanov <voidtra...@gmail.com> > Date: Tue, Dec 18, 2018 at 9:37 AM > Subject: Re: Emitting signals from threads > To: Luca Bacci <luca.bacci...@gmail.com> > > > I found something that is different between the two cases - button click > with signals and without. > > Using the code from the link that Luca posted, I decided to print the size > of each column when a button press is received. As it turns out, the width > of the columns is different in the two cases: > > Without thread signals: > column[0](193) = 0 -> 193 > cell[0] = min->109, natural->109 > column[1](66) = 193 -> 259 > cell[0] = min->20, natural->20 > cell[1] = min->16, natural->16 > cell[2] = min->35, natural->35 > column[2](36) = 259 -> 295 > cell[0] = min->16, natural->16 > x = 105.872116, y = 259.547516 > > (x and y are the coordinates of the button press event) > > With thread signals: > column[0](0) = 0 -> 0 > cell[0] = min->135, natural->135 > column[1](66) = 0 -> 66 > cell[0] = min->20, natural->20 > cell[1] = min->16, natural->16 > cell[2] = min->35, natural->35 > column[2](36) = 66 -> 102 > cell[0] = min->16, natural->16 > x = 113.528488, y = 158.563782 > > As you can see, the width of the first column is 0 when the signals are > being emitted. As expected, if I were to click very close to the left > border of the widget, the edit dialog does not get triggered as the x > coordinate falls within column 1: > > column[0](0) = 0 -> 0 > cell[0] = min->135, natural->135 > column[1](66) = 0 -> 66 > cell[0] = min->20, natural->20 > cell[1] = min->16, natural->16 > cell[2] = min->35, natural->35 > column[2](36) = 66 -> 102 > cell[0] = min->16, natural->16 > x = 21.247330, y = 181.310333 > > I could use the cell renderer width if the column width is 0 but that > seems unreliable since the cell renderer width is not the same as the > column and it's also not static. > > On Tue, Dec 18, 2018 at 8:23 AM Mitko Haralanov <voidtra...@gmail.com> > wrote: > >> I am not posting the complete function because there is a lot of >> irrelevant code. I am also not interested in the specific cell renderer but >> rather the row on which the click occurred. >> >> tatic gboolean on_button_press_event(GtkWidget *widget, >> GdkEvent *event, >> gpointer data) >> { >> GtkTreeView *treeview = GTK_TREE_VIEW(widget); >> GdkEventButton *button = (GdkEventButton *)event; >> GtkTreeModel *model; >> GtkTreePath *path; >> GtkTreeIter iter; >> GtkTreeViewColumn *column; >> GtkScopeProjectEditDialog *dialog; >> GtkScopeProjectEditData *pdata, fill; >> GtkScopeProject *project; >> guint response, index; >> gboolean ret = FALSE; >> >> if (button->type != GDK_BUTTON_PRESS || >> !gtk_tree_view_get_path_at_pos(treeview, button->x, button->y, >> &path, &column, NULL, NULL)) >> return FALSE; >> >> index = GPOINTER_TO_UINT(g_object_get_data(G_OBJECT(column), "index")); >> if (index != TREEVIEW_COLUMN_EDIT) >> goto done; >> model = gtk_tree_view_get_model(treeview); >> if (!gtk_tree_model_get_iter(model, &iter, path)) >> goto done; >> gtk_tree_model_get(model, &iter, PROJECT_COLUMN_OBJ, &project, -1); >> ... >> >> The issue is that the column which is returned by >> gtk_tree_view_get_path_at_pos() is different depending on whether thread >> signals are being emitted vs not. I have verified that the button press >> coordinates are the same (button->x and button->y have the same values in >> both cases). >> >> >> On Tue, Dec 18, 2018 at 5:24 AM Luca Bacci <luca.bacci...@gmail.com> >> wrote: >> >>> Hi Mitko! Can you post here the code for the button-press event handler? >>> It should more or less follow the code here: >>> http://scentric.net/tutorial/sec-misc-get-renderer-from-click.html >>> >>> Luca >>> >>> Il giorno lun 17 dic 2018 alle ore 20:28 Mitko Haralanov via gtk-list < >>> gtk-list@gnome.org> ha scritto: >>> >>>> Hi, >>>> >>>> In my application, I want to be able to update a treeview from a >>>> separate thread. Each treeview row was a column that is a progress bar. The >>>> progress to be displayed is generated by a separate thread as to not block >>>> the UI. >>>> >>>> Since GTK is not thread-safe, the way the application is written is >>>> that the thread, when it needs to emit a signal, will prepare the signal >>>> data and then call g_main_context_invoke_full(NULL, cb, data, ...) in order >>>> to be able to call g_singal_emit() in the global default context thread. >>>> The signal handler updates the tree model, which in turn updates the tree >>>> view. >>>> >>>> For the most part this works with one big, ugly exception - the same >>>> treeview has a column, which is supposed to open the item's Edit dialog >>>> when clicked. So, naturally, I have a button-press handler connected to the >>>> treeview, which launches the Edit dialog when the button press occurs in >>>> the correct column. >>>> >>>> However, when an update is running and the thread is continuously >>>> emitting signals, clicking on *any* column of *any* of the other items >>>> opens the Edit dialog. The treeview behaves as if the items in it have only >>>> one column. >>>> >>>> Every example or document that I have seen in relation to signals from >>>> threads says to emit the signal from a g_idle_add() handler. However, >>>> g_main_context_invoke_full(NULL, ...) should be the same as calling >>>> g_idle_add(). >>>> >>>> Can someone shed some light into what might be happening? >>>> >>>> Thank you. >>>> >>>> >>>> _______________________________________________ >>>> gtk-list mailing list >>>> gtk-list@gnome.org >>>> https://mail.gnome.org/mailman/listinfo/gtk-list >>>> >>> _______________________________________________ > gtk-list mailing list > gtk-list@gnome.org > https://mail.gnome.org/mailman/listinfo/gtk-list >
_______________________________________________ gtk-list mailing list gtk-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-list