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| #include <stdlib.h> /* définition de EXIT_SUCCESS */
#include <string.h>
#include <gtk/gtk.h>
/* Prototypes des fonctions de callback */
static gboolean cb_enter_notify_eventbox (GtkEventBox *, GdkEvent *, GtkWindow *);
static gboolean cb_leave_notify_eventbox (GtkEventBox *, GdkEvent *, GtkWindow *);
static gboolean cb_enter_notify_popup (GtkWindow *, GdkEvent *, gpointer);
static gboolean cb_leave_notify_popup (GtkWindow *, GdkEvent *, gpointer);
static void cb_value_scale_changed (GtkRange *, GtkLabel *);
static gboolean end_timeout (GtkWindow *);
/* Déclaration des objets globaux */
gboolean eventbox_has_pointer = FALSE;
gboolean popup_has_pointer = FALSE;
int main (int argc, char *argv[])
{
/* Initialisation de GTK */
gtk_init (&argc, &argv);
/* Déclaration des objets */
GtkWindow *window, *popup;
GtkGrid *grid;
GtkEventBox *eventbox;
GtkFrame *frame;
GtkLabel *label1, *label2;
GtkAdjustment *adj;
GtkScale *scale;
/* Initialisation des objets */
window = GTK_WINDOW (gtk_window_new (GTK_WINDOW_TOPLEVEL));
grid = GTK_GRID (gtk_grid_new ());
label1 = GTK_LABEL (gtk_label_new ("Valeur : "));
eventbox = GTK_EVENT_BOX (gtk_event_box_new ());
frame = GTK_FRAME (gtk_frame_new (NULL));
label2 = GTK_LABEL (gtk_label_new ("100%"));
popup = GTK_WINDOW (gtk_window_new (GTK_WINDOW_TOPLEVEL));
adj = GTK_ADJUSTMENT (gtk_adjustment_new (0, 0, 100, 1, 0, 0));
scale = GTK_SCALE (gtk_scale_new (GTK_ORIENTATION_VERTICAL, adj));
/* Paramétrage des objets */
gtk_window_set_title (window, "Mon exemple 1");
gtk_container_set_border_width (GTK_CONTAINER (window), 10);
gtk_widget_set_size_request (GTK_WIDGET (window), 600, 600);
gtk_grid_set_row_spacing (grid, 5);
gtk_grid_set_column_homogeneous (grid, FALSE);
gtk_grid_set_row_homogeneous (grid, FALSE);
gtk_widget_set_halign (GTK_WIDGET (grid), GTK_ALIGN_START);
gtk_widget_set_valign (GTK_WIDGET (grid), GTK_ALIGN_START);
gtk_label_set_width_chars (label2, 5);
gtk_label_set_justify (label2, GTK_JUSTIFY_RIGHT);
gtk_widget_set_halign (GTK_WIDGET (label2), GTK_ALIGN_END);
gtk_window_set_decorated (popup, FALSE);
gtk_widget_set_size_request (GTK_WIDGET (popup), 1, 140);
gtk_window_set_resizable (popup, FALSE);
gtk_scale_set_draw_value (scale, FALSE);
gtk_range_set_inverted (GTK_RANGE (scale), TRUE);
/* Attachement des objets les uns dans les autres */
gtk_container_add (GTK_CONTAINER (frame), GTK_WIDGET (label2));
gtk_container_add (GTK_CONTAINER (eventbox), GTK_WIDGET (frame));
gtk_grid_attach (grid, GTK_WIDGET (label1), 0 , 0, 1, 1);
gtk_grid_attach_next_to (grid, GTK_WIDGET (eventbox), GTK_WIDGET (label1), GTK_POS_RIGHT, 1, 1);
gtk_container_add (GTK_CONTAINER (window), GTK_WIDGET (grid));
gtk_container_add (GTK_CONTAINER (popup), GTK_WIDGET (scale));
/* Déclaration des fonctions de callback */
g_signal_connect (G_OBJECT (window), "destroy", G_CALLBACK (gtk_main_quit), NULL);
g_signal_connect (G_OBJECT (eventbox), "enter-notify-event", G_CALLBACK (cb_enter_notify_eventbox), (gpointer) popup);
g_signal_connect (G_OBJECT (eventbox), "leave-notify-event", G_CALLBACK (cb_leave_notify_eventbox), (gpointer) popup);
g_signal_connect (G_OBJECT (popup), "enter-notify-event", G_CALLBACK (cb_enter_notify_popup), NULL);
g_signal_connect (G_OBJECT (popup), "leave-notify-event", G_CALLBACK (cb_leave_notify_popup), NULL);
g_signal_connect (G_OBJECT (scale), "value_changed", G_CALLBACK (cb_value_scale_changed), (gpointer) label2);
/* Affiche les widgets */
gtk_widget_show (GTK_WIDGET (scale));
gtk_widget_show_all (GTK_WIDGET (window));
/* Et c'est parti ! */
gtk_main ();
return EXIT_SUCCESS;
}
static gboolean cb_enter_notify_eventbox (GtkEventBox *eventbox, GdkEvent *event, GtkWindow *popup)
{
/* Déclaration des variables locales à la fonction */
int label_value;
GtkWindow *window;
GtkFrame *frame;
GtkLabel *label;
GtkScale *scale;
GtkAllocation allocation;
gint window_x, window_y, widget_x, widget_y;
/* Note que le pointeur est au dessus de l'enventbox */
eventbox_has_pointer = TRUE;
/* Retrouve les objets */
frame = GTK_FRAME (gtk_bin_get_child (GTK_BIN (eventbox)));
label = GTK_LABEL (gtk_bin_get_child (GTK_BIN (frame)));
scale = GTK_SCALE (gtk_bin_get_child (GTK_BIN (popup)));
/* Affecte la valeur courante du label au curseur */
sscanf (gtk_label_get_text (label), "%d", &label_value);
gtk_range_set_value (GTK_RANGE (scale), (gdouble) label_value);
/* Calcule la position du coin en haut et à droite du frame */
window = GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (eventbox)));
gdk_window_get_position (gtk_widget_get_window (GTK_WIDGET (window)), &window_x, &window_y);
gtk_widget_get_allocation (GTK_WIDGET (frame), &allocation);
gtk_widget_translate_coordinates (GTK_WIDGET (frame), GTK_WIDGET (window), window_x + allocation.width, window_y, &widget_x, &widget_y);
/* Déplace la fenêtre popup juste à droite du frame */
gtk_window_move (popup, widget_x, widget_y);
/* affiche le popup */
gtk_widget_show (GTK_WIDGET (popup));
(void) event;
return TRUE;
}
static gboolean cb_leave_notify_eventbox (GtkEventBox *eventbox, GdkEvent *event, GtkWindow *popup)
{
/* Note que le pointeur a quitté l'enventbox */
eventbox_has_pointer = FALSE;
/* Lance le timeout (2 dixièmes de seconde) */
g_timeout_add (200, (GSourceFunc) end_timeout, (gpointer) popup);
(void) eventbox;
(void) event;
return TRUE;
}
static gboolean cb_enter_notify_popup (GtkWindow *popup, GdkEvent *event, gpointer user_data)
{
/* Note que le pointeur est au dessus du popup */
popup_has_pointer = TRUE;
(void) popup;
(void) event;
(void) user_data;
return TRUE;
}
static gboolean cb_leave_notify_popup (GtkWindow *popup, GdkEvent *event, gpointer user_data)
{
/* Note que le pointeur a quitté la fenêtre popup */
popup_has_pointer = FALSE;
/* Lance le timeout (2 dixièmes de seconde) */
g_timeout_add (200, (GSourceFunc) end_timeout, (gpointer) popup);
(void) user_data;
(void) event;
return TRUE;
}
static void cb_value_scale_changed (GtkRange *scale, GtkLabel *label)
{
/* Déclare une chaîne de caractères pour le label (avec de la marge) */
gchar label_text[10];
/* récupère la valeur du curseur et la recopie dans le label */
sprintf (label_text, "%3.0f%%", gtk_range_get_value (scale));
gtk_label_set_text (label, label_text);
}
static gboolean end_timeout (GtkWindow *popup)
{
/* Si le pointeur de la souris n'est pas au dessus de l'un des widgets */
if ( ! (eventbox_has_pointer || popup_has_pointer))
{
/* Masque la fenêtre popup */
gtk_widget_hide (GTK_WIDGET (popup));
}
return FALSE;
} |
Régler une valeur numérique dans un label à l'aide d'un curseur popup.
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