Re: GObject properties and g_value_set_string()
Hi again, Yes, g_value_set_string() does call g_strdup(). bests, Joël On Thu, Feb 7, 2019 at 5:20 AM Joël Krähemann wrote: > > Hi all, > > Currently, I do my properties like following: > > http://git.savannah.nongnu.org/cgit/gsequencer.git/tree/ags/lib/ags_turtle.c?h=2.1.x#n175 > http://git.savannah.nongnu.org/cgit/gsequencer.git/tree/ags/lib/ags_turtle.c?h=2.1.x#n218 > > Is it ok to do g_strdup() and pass it to g_value_set_string()? > Or does g_value_set_string() duplicate the string for me? > > Does the following make any sense? > > g_value_set_string(value, g_strdup(turtle->filename)); > > This sample code is from GLib-2.0 API Reference Manual: > > > > gint intval; > gchar *strval; > GObject *objval; > > g_object_get (my_object, > "int-property", &intval, > "str-property", &strval, > "obj-property", &objval, > NULL); > > // Do something with intval, strval, objval > > g_free (strval); > g_object_unref (objval); > > > > Since I have to free the string, I just wonder if I need to g_strdup() it. > > bests, > Joël ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
GObject properties and g_value_set_string()
Hi all, Currently, I do my properties like following: http://git.savannah.nongnu.org/cgit/gsequencer.git/tree/ags/lib/ags_turtle.c?h=2.1.x#n175 http://git.savannah.nongnu.org/cgit/gsequencer.git/tree/ags/lib/ags_turtle.c?h=2.1.x#n218 Is it ok to do g_strdup() and pass it to g_value_set_string()? Or does g_value_set_string() duplicate the string for me? Does the following make any sense? g_value_set_string(value, g_strdup(turtle->filename)); This sample code is from GLib-2.0 API Reference Manual: gint intval; gchar *strval; GObject *objval; g_object_get (my_object, "int-property", &intval, "str-property", &strval, "obj-property", &objval, NULL); // Do something with intval, strval, objval g_free (strval); g_object_unref (objval); Since I have to free the string, I just wonder if I need to g_strdup() it. bests, Joël ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: string interpolation
Hi, As you set a string property of a Gtk+ widget, the string is usually duplicated. However don't call any Gtk+ function outside the main loop, i.e. from a different thread. Bests, Joël On Fri, Dec 21, 2018 at 9:49 AM Lutz Lümken wrote: > > Hello, > > does GTK have some kind of string interpolation or can I safely display > user input strings in the widgets without anything unexpected (code > injection, formatting etc.) to happen? > > Best regards, > Lutz Lümken > -- > Lutz Lümkenluem...@pre-sense.de > PRESENSE Technologies GmbHSachsenstr. 5, D-20097 HH > Geschäftsführer/Managing Directors AG Hamburg, HRB 107844 > Till Dörges, Jürgen Sander USt-IdNr.: DE263765024 > > ___ > gtk-app-devel-list mailing list > gtk-app-devel-list@gnome.org > https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Working with embedded images with GResource, GdkPixbuf and GtkWidget
Hi, First you create a GdkPixbuf: https://developer.gnome.org/gdk-pixbuf/stable/gdk-pixbuf-Image-Data-in-Memory.html#gdk-pixbuf-new-from-data then set the property of about dialog: https://developer.gnome.org/gtk2/stable/GtkAboutDialog.html#GtkAboutDialog--logo g_object_set(your_about_dialog, "logo", your_pixbuf, NULL); Why don't you use just following? https://developer.gnome.org/gdk-pixbuf/stable/gdk-pixbuf-File-Loading.html#gdk-pixbuf-new-from-file Bests, Joël On Sun, Nov 11, 2018 at 6:23 PM Alessandro Francesconi wrote: > > Hello, > > > > I need to show some images inside my GTK+ 2.32 application so I decided to > embed them using GResource compiler. > > I’ve prepared an XML file like this: > > > > > > > > > > logo.png ><…..> > > > > > > > > And after “glib-compile-resources.exe --target=icons.c --generate icons.xml”, > I correctly have a .c file with images encoded inside. > > > > Problem here: i need that images to be shown in About dialog > (gtk_show_about_dialog) and buttons (gtk_button_set_image). As far as I know, > to accomplish this I have to create GdkPixbuf (for gtk_about_dialog_set_logo) > and GtkWidget (for gtk_button_set_image). I tried with this code but got some > issues (see the comments): > > > > --- > > GResource* icons = icons_get_resource(); > > GBytes* data = g_resource_lookup_data(icons, path, > G_RESOURCE_LOOKUP_FLAGS_NONE, NULL); > > gsite size = g_bytes_get_size(data); // <-- this works since I have no > errors and the size is > 0, so I expect data to be ok > > > > // now I need to create a GdkPixbuf, is that the correct way? > > GError* e = NULL; > > GdkPixbuf* pixbuf; > > pixbuf = gdk_pixbuf_new_from_inline(g_bytes_get_size(data), data, FALSE, > &e); > // error here! Message is “Image header corrupt” > > > > // if worked… I’d continue by also getting the GtkWidget image with: > GtkWidget* image; > > image = gtk_image_new_from_pixbuf(pixbuf); > > --- > > > > I can’t really understand how Pixbuf expects from the GResource data… also i > read in the docs that “gdk_pixbuf_new_from_inline has been deprecated since > version 2.32 and should not be used in newly-written code. Use GResource > instead.”… so what’s the correct way to create Pixbuf for About boxes and > GdkWidgets for image button? > > > > Thanks for the support > > Alessandro > > > > ___ > gtk-app-devel-list mailing list > gtk-app-devel-list@gnome.org > https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: is there a signal for typing at bottom of window?
Hi again,
For sure you should probably use:
g_signal_connect_after(your_text_buffer, "changed",
G_CALLBACK(your_text_buffer_changed_callback), your_data);
and YOUR_DATA(your_data) just casts to your pointer to a struct or
object containing some information:
struct _YourData{
gint last_newline_position;
};
Well this is it.
Bests,
Joël
On Wed, Sep 26, 2018 at 7:12 AM Joël Krähemann wrote:
>
> Hi,
>
> g_object_get(your_text_view,
> "buffer", &your_text_buffer,
> NULL);
> g_signal_connect(your_text_buffer, "changed",
> G_CALLBACK(your_text_buffer_changed_callback), your_data);
>
> void your_text_buffer_changed_callback(GtkTextBuffer
> *your_text_buffer, gpointer your_data)
> {
> gint line_count;
>
> line_count = gtk_text_buffer_get_line_count(your_text_buffer);
>
> if(line_count > YOUR_DATA(your_data)->line_count){
> gchar *your_text;
>
> g_object_get(your_text_buffer,
> "text", &your_text,
> NULL);
>
> if(your_text[strlen(your_text) - 1] == '\n' &&
> YOUR_DATA(your_data)->last_newline_position <
> &(your_text[strlen(your_text) - 1]) - your_text){
> //TODO:DMC: implement me
> }
> }
> }
>
> by,
> Joël
>
> On Wed, Sep 26, 2018 at 6:49 AM Doug McCasland wrote:
> >
> > Eric, thanks for the ideas!
> >
> > I tried a bunch of things to distinguish the callbacks, but it got too
> > complicated. Checking for a different line number is a clever idea, but
> > PgUp and PgDown also move the cursor which changes the line number.
> > Similar problems for tracking the char offset in the line (for simply
> > typing at the end of the last visible line, not creating a new line/para).
> >
> > So, it would be nice if there was a simple signal for this case, where the
> > window scrolls because of keyboard input in the last visible line.
> >
> > The reason I want this is, is so my app can scroll the window
> > automatically, so that the cursor insert point becomes centered
> > vertically. In other words, when I'm typing a long paragraph, and it's the
> > last visible line, I want it to scroll up, so I'm now typing in the middle
> > of the window (vs. continuing to type on the last visible line).
> >
> > I suppose this is a bit esoteric.
> >
> > I did create a kbd shortcut to do that scroll manually:
> >
> > gtk_text_view_scroll_to_iter(..., 0.0, TRUE, 1.0, 0.5)
> >
> > so I have that to use.
> >
> >
> > On Tue, Sep 25, 2018 at 2:34 PM wrote:
> >
> > >
> > > Not sure how to go about this myself. I see the extra callbacks and it
> > > would be a good thing to limit them. For filtering maybe check if the
> > > cursor has changed lines along with the adjustment value change. Suspect
> > > there is a better solution for this.
> > >
> > > static void value_changed(GtkAdjustment *v_adjust, gpointer textview)
> > > {
> > > static gint s_line=0;
> > > GtkTextIter iter;
> > > GtkTextBuffer
> > > *buffer=gtk_text_view_get_buffer(GTK_TEXT_VIEW(textview));
> > > GtkTextMark *mark=gtk_text_buffer_get_mark(buffer, "insert");
> > > gtk_text_buffer_get_iter_at_mark(buffer, &iter, mark);
> > > gint line=gtk_text_iter_get_line(&iter);
> > > if(s_line!=line)
> > > {
> > > g_print("Scroll Line\n");
> > > s_line=line;
> > > }
> > > }
> > >
> > > Eric
> > >
> > >
> > > -Original Message-
> > > From: Doug McCasland
> > > To: cecashon
> > > Sent: Tue, Sep 25, 2018 2:10 pm
> > > Subject: Re: is there a signal for typing at bottom of window?
> > >
> > > Actually I get 11 signals with a different setting of:
> > > gtk_text_view_set_pixels_inside_wrap()
> > >
> > > So it's one signal per vertical pixel perhaps? I can code for that.
> > >
> > > But I also I get those signals during any scrolling (scrollbar or
> > > mousewheel). How can I distinguish between automatic scrolling at bottom
> > > and user-commanded scrolling?
> > >
> > > thanks
> > >
> > >
> > >
> > >
> > >
> > > On Tue, Sep 25, 2018 at 1:47 PM Doug McCasland
> > > wrote:
> > >
> > > Woo-hoo, that works!
> > >
> > > BUT, I get 12 signals for each line that is auto-scrolled. I can code for
> > > this, but why 12? Will it always be 12?
> > >
> > >
> > > On Tue, Sep 25, 2018 at 11:46 AM wrote:
> > >
> > >
> > > Hi Doug,
> > >
> > > Try getting the vertical adjustment of the scrolled window and connect to
> > > "value-changed". See if that will work. Something like
> > >
> > > ...
> > > static void value_changed(GtkAdjustment *v_adjust, gpointer user_data)
> > > {
> > > }
> > > ...
> > > GtkWidget *scroll=gtk_scrolled_window_new(NULL, NULL);
> > > GtkAdjustment
> > > *v_adjust=gtk_scrolled_window_get_vadjustment(GTK_SCROLLED_WINDOW(scroll));
> > > g_signal_connect(v_adjust, "value-changed", G_CALLBACK(value_changed),
> > > NULL);
> > > ...
> > >
> > > Eric
> > >
> > >
> > >
> > >
> > >
> > > --
> > > Doug McCasland
> > >
> > >
> > >
> > > --
> > > Doug McCasland
> > >
> >
> >
> > --
> > Doug McCasland
> > ___
Re: is there a signal for typing at bottom of window?
Hi,
g_object_get(your_text_view,
"buffer", &your_text_buffer,
NULL);
g_signal_connect(your_text_buffer, "changed",
G_CALLBACK(your_text_buffer_changed_callback), your_data);
void your_text_buffer_changed_callback(GtkTextBuffer
*your_text_buffer, gpointer your_data)
{
gint line_count;
line_count = gtk_text_buffer_get_line_count(your_text_buffer);
if(line_count > YOUR_DATA(your_data)->line_count){
gchar *your_text;
g_object_get(your_text_buffer,
"text", &your_text,
NULL);
if(your_text[strlen(your_text) - 1] == '\n' &&
YOUR_DATA(your_data)->last_newline_position <
&(your_text[strlen(your_text) - 1]) - your_text){
//TODO:DMC: implement me
}
}
}
by,
Joël
On Wed, Sep 26, 2018 at 6:49 AM Doug McCasland wrote:
>
> Eric, thanks for the ideas!
>
> I tried a bunch of things to distinguish the callbacks, but it got too
> complicated. Checking for a different line number is a clever idea, but
> PgUp and PgDown also move the cursor which changes the line number.
> Similar problems for tracking the char offset in the line (for simply
> typing at the end of the last visible line, not creating a new line/para).
>
> So, it would be nice if there was a simple signal for this case, where the
> window scrolls because of keyboard input in the last visible line.
>
> The reason I want this is, is so my app can scroll the window
> automatically, so that the cursor insert point becomes centered
> vertically. In other words, when I'm typing a long paragraph, and it's the
> last visible line, I want it to scroll up, so I'm now typing in the middle
> of the window (vs. continuing to type on the last visible line).
>
> I suppose this is a bit esoteric.
>
> I did create a kbd shortcut to do that scroll manually:
>
> gtk_text_view_scroll_to_iter(..., 0.0, TRUE, 1.0, 0.5)
>
> so I have that to use.
>
>
> On Tue, Sep 25, 2018 at 2:34 PM wrote:
>
> >
> > Not sure how to go about this myself. I see the extra callbacks and it
> > would be a good thing to limit them. For filtering maybe check if the
> > cursor has changed lines along with the adjustment value change. Suspect
> > there is a better solution for this.
> >
> > static void value_changed(GtkAdjustment *v_adjust, gpointer textview)
> > {
> > static gint s_line=0;
> > GtkTextIter iter;
> > GtkTextBuffer
> > *buffer=gtk_text_view_get_buffer(GTK_TEXT_VIEW(textview));
> > GtkTextMark *mark=gtk_text_buffer_get_mark(buffer, "insert");
> > gtk_text_buffer_get_iter_at_mark(buffer, &iter, mark);
> > gint line=gtk_text_iter_get_line(&iter);
> > if(s_line!=line)
> > {
> > g_print("Scroll Line\n");
> > s_line=line;
> > }
> > }
> >
> > Eric
> >
> >
> > -Original Message-
> > From: Doug McCasland
> > To: cecashon
> > Sent: Tue, Sep 25, 2018 2:10 pm
> > Subject: Re: is there a signal for typing at bottom of window?
> >
> > Actually I get 11 signals with a different setting of:
> > gtk_text_view_set_pixels_inside_wrap()
> >
> > So it's one signal per vertical pixel perhaps? I can code for that.
> >
> > But I also I get those signals during any scrolling (scrollbar or
> > mousewheel). How can I distinguish between automatic scrolling at bottom
> > and user-commanded scrolling?
> >
> > thanks
> >
> >
> >
> >
> >
> > On Tue, Sep 25, 2018 at 1:47 PM Doug McCasland
> > wrote:
> >
> > Woo-hoo, that works!
> >
> > BUT, I get 12 signals for each line that is auto-scrolled. I can code for
> > this, but why 12? Will it always be 12?
> >
> >
> > On Tue, Sep 25, 2018 at 11:46 AM wrote:
> >
> >
> > Hi Doug,
> >
> > Try getting the vertical adjustment of the scrolled window and connect to
> > "value-changed". See if that will work. Something like
> >
> > ...
> > static void value_changed(GtkAdjustment *v_adjust, gpointer user_data)
> > {
> > }
> > ...
> > GtkWidget *scroll=gtk_scrolled_window_new(NULL, NULL);
> > GtkAdjustment
> > *v_adjust=gtk_scrolled_window_get_vadjustment(GTK_SCROLLED_WINDOW(scroll));
> > g_signal_connect(v_adjust, "value-changed", G_CALLBACK(value_changed),
> > NULL);
> > ...
> >
> > Eric
> >
> >
> >
> >
> >
> > --
> > Doug McCasland
> >
> >
> >
> > --
> > Doug McCasland
> >
>
>
> --
> Doug McCasland
> ___
> gtk-app-devel-list mailing list
> gtk-app-devel-list@gnome.org
> https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
___
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Fwd: question about gtk_dialog (gtk2)
-- Forwarded message -
From: Joël Krähemann
Date: Thu, Jun 21, 2018 at 1:31 PM
Subject: Re: question about gtk_dialog (gtk2)
To: Wojciech Puchar
Hi,
Alternatively, you could inherit GTK_TYPE_DIALOG and do your very own
object. During ::map() and ::realize() you are able to modify the
GdkWindow. Just query parent and child elements for their dimensions.
Just implement:
GtkWidget::map()
GtkWidget::realize()
GtkWidget::size-allocate()
GtkWidget::size-request()
Bests,
Joël
On Thu, Jun 21, 2018 at 1:21 PM, Joël Krähemann wrote:
> Hi,
>
> FYI some properties are only valid as constructor.
>
> cheers,
> Joël
>
>
> On Thu, Jun 21, 2018 at 1:11 PM, Joël Krähemann wrote:
>> Hi Wojciech,
>>
>> What about:
>>
>> dialog = g_object_new(GTK_TYPE_DIALOG,
>> "window-position", GTK_WIN_POS_CENTER,
>> NULL);
>>
>> bests,
>> Joël
>>
>>
>> On Fri, Jun 15, 2018 at 1:43 PM, Wojciech Puchar
>> wrote:
>>> how to make dialogs appear on center of screen not on left corner. tried
>>> multiple things no results. For normal windows gtk_window_set_position works
>>>
>>> for dialog it doesn't
>>>
>>> below is example routine to ask a yes/no question from my program.
>>>
>>>
>>> i've tried
>>> gtk_window_set_position(GTK_WINDOW(dialog),GTK_WIN_POS_CENTER_ALWAYS);
>>>
>>> but it doesn't work
>>>
>>>
>>> nt pytanie(const char *txt) {
>>> GtkWidget *dialog,*lab;
>>> int odpowiedz;
>>>
>>> dialog=gtk_dialog_new_with_buttons(TEXT_QUESTION,NULL,GTK_DIALOG_DESTROY_WITH_PARENT,
>>> TEXT_TAK,GTK_RESPONSE_ACCEPT,TEXT_NIE,GTK_RESPONSE_NONE,NULL);
>>> lab=new_label(txt);
>>> gtk_container_add (GTK_CONTAINER (gtk_dialog_get_content_area (GTK_DIALOG
>>> (dialog))), lab);
>>> odpowiedz=gtk_dialog_run(GTK_DIALOG(dialog));
>>> gtk_widget_destroy(dialog);
>>> return (odpowiedz==GTK_RESPONSE_ACCEPT);
>>> }
>>>
>>> ___
>>> gtk-app-devel-list mailing list
>>> gtk-app-devel-list@gnome.org
>>> https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
___
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Fwd: question about gtk_dialog (gtk2)
-- Forwarded message -
From: Joël Krähemann
Date: Thu, Jun 21, 2018 at 1:21 PM
Subject: Re: question about gtk_dialog (gtk2)
To: Wojciech Puchar
Hi,
FYI some properties are only valid as constructor.
cheers,
Joël
On Thu, Jun 21, 2018 at 1:11 PM, Joël Krähemann wrote:
> Hi Wojciech,
>
> What about:
>
> dialog = g_object_new(GTK_TYPE_DIALOG,
> "window-position", GTK_WIN_POS_CENTER,
> NULL);
>
> bests,
> Joël
>
>
> On Fri, Jun 15, 2018 at 1:43 PM, Wojciech Puchar
> wrote:
>> how to make dialogs appear on center of screen not on left corner. tried
>> multiple things no results. For normal windows gtk_window_set_position works
>>
>> for dialog it doesn't
>>
>> below is example routine to ask a yes/no question from my program.
>>
>>
>> i've tried
>> gtk_window_set_position(GTK_WINDOW(dialog),GTK_WIN_POS_CENTER_ALWAYS);
>>
>> but it doesn't work
>>
>>
>> nt pytanie(const char *txt) {
>> GtkWidget *dialog,*lab;
>> int odpowiedz;
>>
>> dialog=gtk_dialog_new_with_buttons(TEXT_QUESTION,NULL,GTK_DIALOG_DESTROY_WITH_PARENT,
>> TEXT_TAK,GTK_RESPONSE_ACCEPT,TEXT_NIE,GTK_RESPONSE_NONE,NULL);
>> lab=new_label(txt);
>> gtk_container_add (GTK_CONTAINER (gtk_dialog_get_content_area (GTK_DIALOG
>> (dialog))), lab);
>> odpowiedz=gtk_dialog_run(GTK_DIALOG(dialog));
>> gtk_widget_destroy(dialog);
>> return (odpowiedz==GTK_RESPONSE_ACCEPT);
>> }
>>
>> ___
>> gtk-app-devel-list mailing list
>> gtk-app-devel-list@gnome.org
>> https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
___
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Fwd: question about gtk_dialog (gtk2)
-- Forwarded message -
From: Joël Krähemann
Date: Thu, Jun 21, 2018 at 1:11 PM
Subject: Re: question about gtk_dialog (gtk2)
To: Wojciech Puchar
Hi Wojciech,
What about:
dialog = g_object_new(GTK_TYPE_DIALOG,
"window-position", GTK_WIN_POS_CENTER,
NULL);
bests,
Joël
On Fri, Jun 15, 2018 at 1:43 PM, Wojciech Puchar
wrote:
> how to make dialogs appear on center of screen not on left corner. tried
> multiple things no results. For normal windows gtk_window_set_position works
>
> for dialog it doesn't
>
> below is example routine to ask a yes/no question from my program.
>
>
> i've tried
> gtk_window_set_position(GTK_WINDOW(dialog),GTK_WIN_POS_CENTER_ALWAYS);
>
> but it doesn't work
>
>
> nt pytanie(const char *txt) {
> GtkWidget *dialog,*lab;
> int odpowiedz;
>
> dialog=gtk_dialog_new_with_buttons(TEXT_QUESTION,NULL,GTK_DIALOG_DESTROY_WITH_PARENT,
> TEXT_TAK,GTK_RESPONSE_ACCEPT,TEXT_NIE,GTK_RESPONSE_NONE,NULL);
> lab=new_label(txt);
> gtk_container_add (GTK_CONTAINER (gtk_dialog_get_content_area (GTK_DIALOG
> (dialog))), lab);
> odpowiedz=gtk_dialog_run(GTK_DIALOG(dialog));
> gtk_widget_destroy(dialog);
> return (odpowiedz==GTK_RESPONSE_ACCEPT);
> }
>
> ___
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> gtk-app-devel-list@gnome.org
> https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
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