location of widgets in a gtk_table
to the window */ /* gtk_container_add (GTK_CONTAINER (win), boxv2); */ gtk_container_add (GTK_CONTAINER (win), pTable); /* Enter the main loop */ gtk_widget_show_all (win); gtk_main(); return 0; Hence, if the main windows only contains the Gtk_table, then everything works fine. This looks really weird to me. How come locations of widgets within a Gtk_table can be modified if such a Gtk_table is included in a box with other widgets?? I really do not have any idea, and any help on this will be more than welcomed! Thanks is all cases for your time! Cheers, Eric. -- ~~ Eric Wajnberg Associated Professor at the University of Montreal (Quebec, Canada) I.N.R.A. 400 Route des Chappes, BP 167, 06903 Sophia Antipolis Cedex, France Tel: (33-0) 4.92.38.64.47 Fax: (33-0) 4.92.38.65.57 e-mail: wajnb...@sophia.inra.fr Web page: http://www.sophia.inra.fr/perso/wajnberg/ Editor-in-Chief of BioControl, Published by Springer. ~~ ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: changing font, color, size, etc. in a GtkEntry
Thanks Michael for your answer. The compilation is ok. No error message. This is the linker that reports, e.g.: undefined reference to `pango_font_description_from_string' The instruction I use to compile is (which is launched by CodeBlocks): mingw32-g++.exe -LC:\Program Files (x86)\CodeBlocks\gtk\lib -o bin\Release\entry2.exe obj\Release\main.o -s -lgtk-win32-2.0 -lgobject-2.0 -lglib-2.0 -mwindows So, all needed libraries are here, I think. Of course, my code starts with: #include pango/pango.h So, there are apparently - in my view - no header or library missing. In the meantime, I tried to do this on another computer at work. I got the same message. No way to have these pango functions recognized. Is there something obvious I am missing? Any help on this is welcomed! Cheers, Eric. Michael Cronenworth wrote, On 06/11/2013 15:22, Eric Wajnberg wrote: However, as I've mentioned in my original post, functions like pango_font_description_from_string, etc. are not recognized in my coding environment (while I can define pointer to things like PangoFontDescription without problem). This looks weird to me. Is there some specific libraries or headers I have to load or declare before? Or are these fonctions available on GTK 3 only, and - if yes - what can I do, then? (I am coding on Windows with CodeBlocks 12.11 and GTK 2.24.0). Pango is not tied to a GTK version. You can use GTK 2 for this. What do you mean not recognized? The compiler reports an undefined function? The linker reports an undefined function? The function has been around for a very long time (at least since Pango 1.10) so this is not something new. It appears your development environment is missing headers and/or libraries. Something to consider: I cross-compile Windows binaries under Fedora using MinGW packages. You may find this a better alternative as packages will be up-to-date (GTK 2.24.22), packaged properly, and find some support from the packagers and upstream in case something like this goes wrong. ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list -- ~~ Eric Wajnberg Associated Professor at the University of Montreal (Quebec, Canada) I.N.R.A. 400 Route des Chappes, BP 167, 06903 Sophia Antipolis Cedex, France Tel: (33-0) 4.92.38.64.47 Fax: (33-0) 4.92.38.65.57 e-mail: wajnb...@sophia.inra.fr Web page: http://www.sophia.inra.fr/perso/wajnberg/ Editor-in-Chief of BioControl, Published by Springer. ~~ ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: changing font, color, size, etc. in a GtkEntry
Ok, I finally find out what was the problem.. I had to add the library pango-1.0.lib in the compiling options. Strange that this was not included initially when building a project with gtk+. P.. I spent days on this... Thanks is all cases for your help on this. Cheers, Eric. Eric Wajnberg wrote, On 07/11/2013 11:48, Thanks Michael for your answer. The compilation is ok. No error message. This is the linker that reports, e.g.: undefined reference to `pango_font_description_from_string' The instruction I use to compile is (which is launched by CodeBlocks): mingw32-g++.exe -LC:\Program Files (x86)\CodeBlocks\gtk\lib -o bin\Release\entry2.exe obj\Release\main.o -s -lgtk-win32-2.0 -lgobject-2.0 -lglib-2.0 -mwindows So, all needed libraries are here, I think. Of course, my code starts with: #include pango/pango.h So, there are apparently - in my view - no header or library missing. In the meantime, I tried to do this on another computer at work. I got the same message. No way to have these pango functions recognized. Is there something obvious I am missing? Any help on this is welcomed! Cheers, Eric. Michael Cronenworth wrote, On 06/11/2013 15:22, Eric Wajnberg wrote: However, as I've mentioned in my original post, functions like pango_font_description_from_string, etc. are not recognized in my coding environment (while I can define pointer to things like PangoFontDescription without problem). This looks weird to me. Is there some specific libraries or headers I have to load or declare before? Or are these fonctions available on GTK 3 only, and - if yes - what can I do, then? (I am coding on Windows with CodeBlocks 12.11 and GTK 2.24.0). Pango is not tied to a GTK version. You can use GTK 2 for this. What do you mean not recognized? The compiler reports an undefined function? The linker reports an undefined function? The function has been around for a very long time (at least since Pango 1.10) so this is not something new. It appears your development environment is missing headers and/or libraries. Something to consider: I cross-compile Windows binaries under Fedora using MinGW packages. You may find this a better alternative as packages will be up-to-date (GTK 2.24.22), packaged properly, and find some support from the packagers and upstream in case something like this goes wrong. ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list -- ~~ Eric Wajnberg Associated Professor at the University of Montreal (Quebec, Canada) I.N.R.A. 400 Route des Chappes, BP 167, 06903 Sophia Antipolis Cedex, France Tel: (33-0) 4.92.38.64.47 Fax: (33-0) 4.92.38.65.57 e-mail: wajnb...@sophia.inra.fr Web page: http://www.sophia.inra.fr/perso/wajnberg/ Editor-in-Chief of BioControl, Published by Springer. ~~ ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
changing font, color, size, etc. in a GtkEntry
Hi there, I have a simple problem for weeks that I remain unable to solve. I simply want to modify the font, color, size, etc. of the characters entered while they are typed in a GtkEntry. I am coding with GTK 2.24.0. Looking around on the web, I found several possible functions to do that, some of them seem to be specific to GTK3, however. I found - and tried to play with - things like: gtk_entry_set_attributes gtk_widget_modify_text gtk_widget_modify_base gtk_widget_modify_font gtk_widget_create_pango_layout gtk_widget_create_pango_context Some of them lead me to define and to argument a pointer to a struct of type PangoFontDescription or GtkStyle. Hence, it seems that I also need to use function like, e.g., pango_font_description_set_weight, etc., but I'm not fully sure about this. I remained unable to sort this out, and some of these functions are even not recognized in my coding environment.. Hence, I just have now no idea about how to solve this. Code examples (for example, like here: http://www.yolinux.com/TUTORIALS/GTK+ProgrammingTips.html#TEXTBOXESFONTS) and/or explanations would be more than welcomed! Thanks for any help in this. Cheers, Eric. -- ~~ Eric Wajnberg Associated Professor at the University of Montreal (Quebec, Canada) I.N.R.A. 400 Route des Chappes, BP 167, 06903 Sophia Antipolis Cedex, France Tel: (33-0) 4.92.38.64.47 Fax: (33-0) 4.92.38.65.57 e-mail: wajnb...@sophia.inra.fr Web page: http://www.sophia.inra.fr/perso/wajnberg/ Editor-in-Chief of BioControl, Published by Springer. ~~ ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: changing font, color, size, etc. in a GtkEntry
Thanks Michael, This is indeed the sort of solutions I've tried. However, as I've mentioned in my original post, functions like pango_font_description_from_string, etc. are not recognized in my coding environment (while I can define pointer to things like PangoFontDescription without problem). This looks weird to me. Is there some specific libraries or headers I have to load or declare before? Or are these fonctions available on GTK 3 only, and - if yes - what can I do, then? (I am coding on Windows with CodeBlocks 12.11 and GTK 2.24.0). Any help on this will be welcomed! Cheers, Eric. Michael Cronenworth wrote, On 05/11/2013 17:15, Eric Wajnberg wrote: I simply want to modify the font, color, size, etc. of the characters entered while they are typed in a GtkEntry. I am coding with GTK 2.24.0. Looking around on the web, I found several possible functions to do that, some of them seem to be specific to GTK3, however. I found - and tried to play with - things like: gtk_entry_set_attributes gtk_widget_modify_text gtk_widget_modify_base gtk_widget_modify_font gtk_widget_create_pango_layout gtk_widget_create_pango_context Some of them lead me to define and to argument a pointer to a struct of type PangoFontDescription or GtkStyle. Hence, it seems that I also need to use function like, e.g., pango_font_description_set_weight, etc., but I'm not fully sure about this. I remained unable to sort this out, and some of these functions are even not recognized in my coding environment.. You are close. You need to use gtk_widget_modify_font(). You pass in a font description created by: PangoFontDescription *fontDesc = pango_font_description_from_string( monospace 10 ); This would set the entry text to a monospace-type font with 10 point size. Don't forget to call pango_font_description_free() afterwards. If you wish to change font while typing you need to connect to the key-press-event signal on the GtkEntry widget and handle key presses that way. ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list -- ~~ Eric Wajnberg Associated Professor at the University of Montreal (Quebec, Canada) I.N.R.A. 400 Route des Chappes, BP 167, 06903 Sophia Antipolis Cedex, France Tel: (33-0) 4.92.38.64.47 Fax: (33-0) 4.92.38.65.57 e-mail: wajnb...@sophia.inra.fr Web page: http://www.sophia.inra.fr/perso/wajnberg/ Editor-in-Chief of BioControl, Published by Springer. ~~ ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: updating labels when a key is stroked
Ok, thanks!
I'm just plain stupid. I indeed just have to collect a key_press_event
event and that's it!
Sorry for disturbing the list with such a basic question (I am still
learning how to use gtk)..
Cheers to all,
Eric.
Kang Hu wrote, On 09/08/2013 09:39,
all you need is an event filter.
remove the 'g_timeout_add' line with the following code.
0. get the gdk window of the created top-level gtk window.
GdkWindow
https://developer.gnome.org/gdk2/stable/gdk3-Windows.html#GdkWindow*
gtk_widget_get_window
https://developer.gnome.org/gtk3/3.8/GtkWidget.html#gtk-widget-get-window(/|GtkWidget
https://developer.gnome.org/gtk3/3.8/GtkWidget.html *widget|/);
GdkWindow* gdkwindow = gtk_widget_get_window (pWindow);
1. add event mask you're interested in
voidgdk_window_set_events
https://developer.gnome.org/gdk3/3.8/gdk3-Windows.html#gdk-window-set-events(/|GdkWindow
https://developer.gnome.org/gdk3/3.8/gdk3-Windows.html#GdkWindow
*window|/,/|GdkEventMask
https://developer.gnome.org/gdk3/3.8/gdk3-Events.html#GdkEventMask
event_mask|/);
gdk_window_set_events (gdkwindow, GDK_KEY_PRESS_MASK);
2. register an event filter
voidgdk_window_add_filter (/|GdkWindow
https://developer.gnome.org/gdk3/3.8/gdk3-Windows.html#GdkWindow
*window|/,/|GdkFilterFunc
https://developer.gnome.org/gdk3/3.8/gdk3-Windows.html#GdkFilterFunc
function|/,/|gpointer
https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gpointer
data|/);
gdk_window_add_filter (gdkwindow, key_press_filter, pWindow);
3. write the filter function.
GdkFilterReturn
https://developer.gnome.org/gdk3/3.8/gdk3-Windows.html#GdkFilterReturn (*GdkFilterFunc)
(/|GdkXEvent
https://developer.gnome.org/gdk3/3.8/gdk3-Windows.html#GdkXEvent *xevent|/,/|GdkEvent
https://developer.gnome.org/gdk3/3.8/gdk3-Event-Structures.html#GdkEvent *event|/,/|gpointer
https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gpointer data|/);
GdkFilterReturn key_press_filter (GdkXEvent* xevent, GdkEvent*
event, gpointer data)
{
// how to process key press events.
}
On Wed, Aug 7, 2013 at 8:48 PM, Eric Wajnberg
eric.wajnb...@sophia.inra.fr mailto:eric.wajnb...@sophia.inra.fr
wrote:
Hi there,
I need to develop a gtk code in which a label is changed each time
a key is stroked on the keyboad. I thus use g_timeout_add() to
launch on a regular basis a function that listens to key strokes.
Within this function, I used a combination of kbhit()/getch() to
collected the stroken keys (because I do not want the user to hit
the return key all the time) and update the label accordingly.
The following code is just a try, and seems ok:
#include stdlib.h
#include stdio.h
#include conio.h
#include gtk/gtk.h
int key=0;
char string[500];
int main(int argc, char **argv)
{
/* declaration of widgets */
GtkWidget *pWindow; /*main windows */
GtkWidget *pLabel; /* a label */
void OnDestroy(GtkWidget *pWidget, gpointer pData); /*
function call back destroy */
gboolean update(gpointer pData); /* function called at regular
intervals */
/* Initialisation of GTK+ */
gtk_init(argc, argv);
/* creation of the main window */
pWindow = gtk_window_new(GTK_WINDOW_TOPLEVEL);
/* parameters of the window */
gtk_window_set_position(GTK_WINDOW(pWindow), GTK_WIN_POS_CENTER);
gtk_window_set_default_size(GTK_WINDOW(pWindow), 300, 100);
gtk_window_set_title(GTK_WINDOW(pWindow), testing key input);
/* creation of the label */
(void)sprintf(string,%d,key);
pLabel=gtk_label_new(string);
/* adding the label to the window */
gtk_container_add(GTK_CONTAINER(pWindow), pLabel);
/* signal connexion */
g_signal_connect(G_OBJECT(pWindow), destroy,
G_CALLBACK(OnDestroy), NULL);
/* function called at regular intervals .. */
g_timeout_add((guint)1, update,(gpointer *)pLabel);
/* showing the window */
gtk_widget_show_all(pWindow);
/* starting the loop */
gtk_main();
return EXIT_SUCCESS;
}
gboolean update(gpointer pData)
{
/* updating the label */
if (kbhit())
{
key=getch();
(void)sprintf(string, %d,key);
gtk_label_set_label(GTK_LABEL(pData), string);
}
return TRUE;
}
void OnDestroy(GtkWidget *pWidget, gpointer pData)
{
/* stopping the loop */
gtk_main_quit();
}
The point is that this is actually not working correctly, because
the keystrokes are collected on a console that is not there! In
other words, the code above works well in debug mode (e.g., on
Code::Blocks) when a debugging console is available, but not in
release mode running without a console.
My question is thus: is there a way to listen to key
updating labels when a key is stroked
Hi there,
I need to develop a gtk code in which a label is changed each time a key
is stroked on the keyboad. I thus use g_timeout_add() to launch on a
regular basis a function that listens to key strokes. Within this
function, I used a combination of kbhit()/getch() to collected the
stroken keys (because I do not want the user to hit the return key all
the time) and update the label accordingly. The following code is just a
try, and seems ok:
#include stdlib.h
#include stdio.h
#include conio.h
#include gtk/gtk.h
int key=0;
char string[500];
int main(int argc, char **argv)
{
/* declaration of widgets */
GtkWidget *pWindow; /*main windows */
GtkWidget *pLabel; /* a label */
void OnDestroy(GtkWidget *pWidget, gpointer pData); /* function
call back destroy */
gboolean update(gpointer pData); /* function called at regular
intervals */
/* Initialisation of GTK+ */
gtk_init(argc, argv);
/* creation of the main window */
pWindow = gtk_window_new(GTK_WINDOW_TOPLEVEL);
/* parameters of the window */
gtk_window_set_position(GTK_WINDOW(pWindow), GTK_WIN_POS_CENTER);
gtk_window_set_default_size(GTK_WINDOW(pWindow), 300, 100);
gtk_window_set_title(GTK_WINDOW(pWindow), testing key input);
/* creation of the label */
(void)sprintf(string,%d,key);
pLabel=gtk_label_new(string);
/* adding the label to the window */
gtk_container_add(GTK_CONTAINER(pWindow), pLabel);
/* signal connexion */
g_signal_connect(G_OBJECT(pWindow), destroy,
G_CALLBACK(OnDestroy), NULL);
/* function called at regular intervals .. */
g_timeout_add((guint)1, update,(gpointer *)pLabel);
/* showing the window */
gtk_widget_show_all(pWindow);
/* starting the loop */
gtk_main();
return EXIT_SUCCESS;
}
gboolean update(gpointer pData)
{
/* updating the label */
if (kbhit())
{
key=getch();
(void)sprintf(string, %d,key);
gtk_label_set_label(GTK_LABEL(pData), string);
}
return TRUE;
}
void OnDestroy(GtkWidget *pWidget, gpointer pData)
{
/* stopping the loop */
gtk_main_quit();
}
The point is that this is actually not working correctly, because the
keystrokes are collected on a console that is not there! In other words,
the code above works well in debug mode (e.g., on Code::Blocks) when a
debugging console is available, but not in release mode running
without a console.
My question is thus: is there a way to listen to key stroked on the
keyboard within a gtk application?
Thanks for any help on this!
Cheers, Eric.
--
~~
Eric Wajnberg
Associated Professor at the
University of Montreal (Quebec, Canada)
I.N.R.A.
400 Route des Chappes, BP 167,
06903 Sophia Antipolis Cedex, France
Tel: (33-0) 4.92.38.64.47
Fax: (33-0) 4.92.38.65.57
e-mail: wajnb...@sophia.inra.fr
Web page: http://www.sophia.inra.fr/perso/wajnberg/
Editor-in-Chief of BioControl, Published by Springer.
~~
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code crash after 25-30 min only!
Hi there,
I just remain unable to debug this code. Actually, it runs very well but
crashes after 30-35 minutes only.
This is a stopwatch-type app. However, I actually need to refresh
things on a continuous basis. Hence, a g_timeout_add_seconds() is
**not** what I need. The idea of a stopwatch is just a way for me to
learn and practice.
The code that I have is more or less this one:
#include stdlib.h
#include gtk/gtk.h
#include strings.h
int flag_depart=1;
char format_sortie[100];
typedef struct
{
GtkWidget *widget1;
GTimer *widget2;
} MyStruct; /* a struct to pass several arguments to an callback */
int main(int argc, char **argv)
{
/* declaration of widgets */
[...]
GtkWidget *pLabel; /* a label */
GTimer *timer; /* a timer */
gchar* sUtf8; /* to format a char string */
[...]
MyStruct struct_tempo; /* a struct to pass several arguments to an
callback */
[...]
gboolean OnExpose(GtkWidget *pWidget, GdkEvent *event, gpointer
pData); /* function callback expose-event */
[...]
/* creation of the label */
pLabel=gtk_label_new(NULL);
(void)sprintf(format_sortie, span font_desc=\25\b00 : 00 :
00/b/span);
sUtf8 = g_locale_to_utf8(format_sortie, -1, NULL, NULL, NULL);
gtk_label_set_markup(GTK_LABEL(pLabel), sUtf8);
g_free(sUtf8);
/* we put the label in the struct */
struct_tempo.widget1=pLabel;
/* creation of the timer */
timer=g_timer_new();
/* we put the timer in the struct */
struct_tempo.widget2=timer;
/* Connexion of signals */
g_signal_connect(G_OBJECT(pWindow), expose-event,
G_CALLBACK(OnExpose), (gpointer )struct_tempo);
[...]
return EXIT_SUCCESS;
}
gboolean OnExpose(GtkWidget *pWidget, GdkEvent *event, gpointer pData)
{
/* updating the label */
char tempo[1000],h[3],m[3],s[3];
int heures=0, minutes=0;
GTimeSpan secondes=0;
gchar* sUtf8;
MyStruct *struct_tempo2;
struct_tempo2= (MyStruct *)pData;
float convertir(GTimeSpan *secondes, int *minutes, int *heures);
if (flag_depart)
{
secondes=(GTimeSpan)g_timer_elapsed(struct_tempo2-widget2, NULL);
convertir(secondes, minutes, heures);
if (secondes9)
(void)sprintf(s, %d,secondes);
else
(void)sprintf(s, 0%d,secondes);
if (minutes9)
(void)sprintf(m, %d,minutes);
else
(void)sprintf(m, 0%d,minutes);
if (heures9)
(void)sprintf(h, %d,heures);
else
(void)sprintf(h, 0%d,heures);
(void)sprintf(tempo, span font_desc=\25\b%s : %s :
%s/b/span,h, m, s);
sUtf8 = g_locale_to_utf8(tempo, -1, NULL, NULL, NULL);
gtk_label_set_markup(GTK_LABEL(struct_tempo2-widget1), tempo);
}
g_free(sUtf8);
return FALSE;
}
float convertir(GTimeSpan *secondes, int *minutes, int * heures)
{
/* convert seconds into hours, minuts and seconds */
while (*secondes59)
{
*minutes=*minutes+1;
*secondes=*secondes-60;
}
while (*minutes59)
{
*heures=*heures+1;
*minutes=*minutes-60;
}
}
This codes works well but crashes avec about 30-35 minutes. I code in
Windows 7 with CodeBlock. I've tried to use a debugger, but I get a:
Segmentation fault.
In ntdll!LdrWx86FormatVirtualImage () (C:\Windows\system32\ntdll.dll)
as soon as the gtk_main() is launched. I have really no idea about how I
can solve this now.
Any help will be welcomed!!
Thanks in advance for this.
Cheers, Eric.
--
~~
Eric Wajnberg
Associated Professor at the
University of Montreal (Quebec, Canada)
I.N.R.A.
400 Route des Chappes, BP 167,
06903 Sophia Antipolis Cedex, France
Tel: (33-0) 4.92.38.64.47
Fax: (33-0) 4.92.38.65.57
e-mail: wajnb...@sophia.inra.fr
Web page: http://www.sophia.inra.fr/perso/wajnberg/
Editor-in-Chief of BioControl, Published by Springer.
~~
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