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| #include <stdlib.h> /* Définition de EXIT_SUCCESS */
#include <gtk/gtk.h>
/* Définition des unions regroupant les différents types de widgets */
/* A définir pour tous les objets de la bibliothèque et à mettre dans un fichier ".h" */
typedef union
{
GObject *object;
GInitiallyUnowned *initiallyunowned;
GtkWidget *widget;
GtkContainer *container;
GtkBin *bin;
GtkWindow *window;
} GTKWINDOW;
typedef union
{
GObject *object;
GInitiallyUnowned *initiallyunowned;
GtkWidget *widget;
GtkContainer *container;
GtkGrid *grid;
} GTKGRID;
typedef union
{
GObject *object;
GInitiallyUnowned *initiallyunowned;
GtkAdjustment *adjustment;
} GTKADJUSTMENT;
typedef union
{
GObject *object;
GInitiallyUnowned *initiallyunowned;
GtkWidget *widget;
GtkEntry *entry;
GtkSpinButton *spinbutton;
} GTKSPINBUTTON;
typedef union
{
GObject *object;
GInitiallyUnowned *initiallyunowned;
GtkWidget *widget;
GtkRange *range;
GtkScale *scale;
} GTKSCALE;
typedef union
{
GObject *object;
GInitiallyUnowned *initiallyunowned;
GtkWidget *widget;
GtkContainer *container;
GtkBin *bin;
GtkButton *button;
GtkToggleButton *togglebutton;
GtkCheckButton *checkbutton;
} GTKCHECKBUTTON;
/* structure regroupant les trois widgets (permet de passer un pointeur global à la fonction value_changed) */
typedef struct
{
GTKSPINBUTTON spin;
GTKSCALE scale;
GTKCHECKBUTTON check;
} Widgets;
/* Prototype de la fonction de callback */
static void cb_value_changed (GtkWidget *, Widgets *);
int main (int argc, char *argv[])
{
/* Déclaration des variables */
GTKWINDOW window;
GTKGRID grid;
GTKADJUSTMENT adj1, adj2;
Widgets *w = (Widgets *) g_malloc (sizeof (Widgets));
/* Initialisation de GTK+ */
gtk_init (&argc, &argv);
/* Création des widgets */
window.widget = gtk_window_new (GTK_WINDOW_TOPLEVEL);
grid.widget = gtk_grid_new ();
adj1.adjustment = gtk_adjustment_new (0.5, 0.0, 1.02, 0.01, 0.02, 0.02);
adj2.adjustment = gtk_adjustment_new (0.5, 0.0, 1.02, 0.01, 0.02, 0.02);
w->spin.widget = gtk_spin_button_new (adj1.adjustment, 0.01, 2);
w->scale.widget = gtk_scale_new (GTK_ORIENTATION_HORIZONTAL, adj2.adjustment);
w->check.widget = gtk_check_button_new_with_label ("Synchronize Spin and Scale");
/* Paramétrage des widgets */
gtk_window_set_title (window.window, "Exercise 4-2");
gtk_container_set_border_width (window.container, 10);
gtk_grid_set_row_spacing (grid.grid, 5);
gtk_grid_set_column_homogeneous (grid.grid, FALSE);
gtk_grid_set_row_homogeneous (grid.grid, FALSE);
gtk_toggle_button_set_active (w->check.togglebutton, TRUE);
gtk_scale_set_digits (w->scale.scale, 2);
/* Attachement des widgets les uns aux autres */
gtk_grid_attach (grid.grid, w->spin.widget, 0 , 0, 1, 1);
gtk_grid_attach_next_to (grid.grid, w->scale.widget, w->spin.widget, GTK_POS_BOTTOM, 1, 1);
gtk_grid_attach_next_to (grid.grid, w->check.widget, w->scale.widget, GTK_POS_BOTTOM, 1, 1);
gtk_container_add (window.container, grid.widget);
/* Attachement des signaux aux widgets */
g_signal_connect (window.object, "destroy", G_CALLBACK (gtk_main_quit), NULL);
g_signal_connect (w->spin.object, "value_changed", G_CALLBACK (cb_value_changed), (gpointer) w);
g_signal_connect (w->scale.object, "value_changed", G_CALLBACK (cb_value_changed), (gpointer) w);
/* Affichage des widgets */
gtk_widget_show_all (window.widget);
/* Et c'est parti */
gtk_main ();
/* Libération de la mémoire */
g_free (w);
return EXIT_SUCCESS;
}
static void cb_value_changed (GtkWidget *widget, Widgets *w)
{
/* Déclaration des variables */
gdouble val1, val2;
/* Récupère les valeurs des deux widgets */
val1 = gtk_spin_button_get_value (w->spin.spinbutton);
val2 = gtk_range_get_value (w->scale.range);
/* Si la synchronisation est activée */
if (gtk_toggle_button_get_active (w->check.togglebutton) && val1 != val2)
{
/* Ajuste la valeur du widget "passif" par rapport à celle du widget qui a activé le signal */
if (GTK_IS_SPIN_BUTTON (widget)) gtk_range_set_value (w->scale.range, val1);
else gtk_spin_button_set_value (w->spin.spinbutton, val2);
}
} |
