gtk2 +glade +c gtk_label_set_text funktioniert nicht

asuro

Hallo,
wie gesagt ich schreib in C hab gerade angefangen in glade mir eine einfache GUI zusammen zu clicken. Habe versuch dann in einem Label den Text zuändern, es kommt immer nur zwei Fehlermeldungen.

main.c: In Funktion »on_button1_clicked«:
main.c:84: Fehler: expected expression before »GtkLabel«
main.c:84: Fehler: Zu wenige Argumente für Funktion »gtk_label_set_text«

und so sieht mein Code aus:

#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <string.h>
#include <stdio.h>

#include <config.h>

#include <gtk/gtk.h>
#include <glade/glade.h>

/*
 * Standard gettext macros.
 */
#ifdef ENABLE_NLS
#  include <libintl.h>
#  undef _
#  define _(String) dgettext (PACKAGE, String)
#  ifdef gettext_noop
#    define N_(String) gettext_noop (String)
#  else
#    define N_(String) (String)
#  endif
#else
#  define textdomain(String) (String)
#  define gettext(String) (String)
#  define dgettext(Domain,Message) (Message)
#  define dcgettext(Domain,Message,Type) (Message)
#  define bindtextdomain(Domain,Directory) (Domain)
#  define _(String) (String)
#  define N_(String) (String)
#endif

#include "callbacks.h"

/* For testing propose use the local (not installed) glade file */
/* #define GLADE_FILE PACKAGE_DATA_DIR"/einkaufsliste/glade/einkaufsliste.glade" */
#define GLADE_FILE "einkaufsliste.glade"

GtkWidget*
create_window (void)
{
	GtkWidget *window;
	GladeXML *gxml;

	gxml = glade_xml_new (GLADE_FILE, NULL, NULL);

	/* This is important */
	glade_xml_signal_autoconnect (gxml);
	window = glade_xml_get_widget (gxml, "window");

	return window;
}

void on_button1_clicked(GtkButton*button,gpointer user_data) // Callback Funktion
{
	gchar txt[]="Anderer Text";
	gchar *ptxt;
	ptxt=&txt[0];
    g_print("Anderer Text\n");
	gtk_label_set_text(GtkLabel*label, ptxt);
}

void on_button2_clicked(GtkButton*button,gpointer user_data) // Callback Funktion
{
    g_print("Schließen\n");
	gtk_main_quit();
}

int
main (int argc, char *argv[])
{
 	GtkWidget *window;

#ifdef ENABLE_NLS
	bindtextdomain (GETTEXT_PACKAGE, PACKAGE_LOCALE_DIR);
	bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
	textdomain (GETTEXT_PACKAGE);
#endif

	gtk_set_locale ();
	gtk_init (&argc, &argv);

	window = create_window ();
	gtk_widget_show (window);

	gtk_main ();
	return 0;
}

GPC

Hallo,

natürlich funktioniert es nicht, wenn man es falsch benutzt. Du hast ja auch gar kein Label, wo du Text setzen könntest.

So geht das:

#include <gtk/gtk.h>

/* Ein paar Testausgaben */
static gchar *array[] = { "This is short",
			  "But this one is a real looooooong one",
			  "I'm just between the other two",
			  "Look at me, I'll stretch the window once more ;-)",
			  "And I'm even\nmultiline"
};

/* Unsere Applikation. Enthält einige Gtk-Komponenten*/
typedef struct {
  GtkWidget *button, *label, *vbox, *window;  
} Application;

Application *app;

/* Die zwei Signal-Funktionen */
static void destroy(GtkWidget *w, gpointer data) {
  gtk_main_quit();
}

static void clicked(GtkWidget *widget, gpointer data) {
  static int i = 0;
  if (i > 4)
    i = 0;

  gtk_label_set_text(GTK_LABEL(app->label), array[i++]);
}

int main(int argc, char **argv) {
  gtk_init(&argc, &argv);

  app = malloc(sizeof(Application));

  /* GtkButton initalisieren */
  app->button = gtk_button_new();
  gtk_button_set_label(GTK_BUTTON(app->button), "OK");

  /* GtkLabel initalisieren */
  app->label = gtk_label_new("Click the button");
  gtk_label_set_single_line_mode(GTK_LABEL(app->label), FALSE);

  /* GtkVBox mit GtkButton und GtkLabel initalisieren */
  app->vbox = gtk_vbox_new(FALSE, 20);

  gtk_container_add(GTK_CONTAINER(app->vbox), app->button);
  gtk_container_add(GTK_CONTAINER(app->vbox), app->label);

  app->window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
  gtk_window_set_title(GTK_WINDOW(app->window), "Test");

  /* GtkVBox zum GtkWindow hinzufügen */
  gtk_container_add(GTK_CONTAINER(app->window), app->vbox);

  /* Signal-Handler setzen */
  g_signal_connect(G_OBJECT(app->window),"destroy", G_CALLBACK(destroy), NULL);
  g_signal_connect(G_OBJECT(app->button),"clicked", G_CALLBACK(clicked), NULL);

  /* Und los geht die wilde Fahrt */
  gtk_widget_show_all(app->window);

  gtk_main();

  free(app);

  return 0;
}

Cheers

GPC