1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192
| #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);
}
} |
Partager