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| #include <stdlib.h>
#include <math.h>
#include <gtk/gtk.h>
#include <pango/pango.h>
int px, py;
gboolean maj_draw(GtkWidget *widget, GdkEventExpose *event);
gboolean depl_souris(GtkWidget *widget, GdkEventMotion *event);
void quit();
int main(int argc, char *argv[])
{
GtkWidget *window; //la fenêtre
GtkWidget *draw;
//initialisation de la fenêtre
gtk_init(&argc, &argv);
window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
gtk_window_set_default_size(GTK_WINDOW(window), 200, 200);
//initialisation de la drawing_area
draw = gtk_drawing_area_new ();
gtk_widget_set_size_request(GTK_WIDGET(draw), 200, 200);
gtk_widget_set_events(draw, GDK_EXPOSURE_MASK | GDK_LEAVE_NOTIFY_MASK | GDK_BUTTON_PRESS_MASK | GDK_POINTER_MOTION_MASK);
gtk_container_add(GTK_CONTAINER(window), draw);
//connection des signaux
g_signal_connect(G_OBJECT(window), "destroy", G_CALLBACK (quit), NULL);
g_signal_connect(G_OBJECT(draw), "expose_event", G_CALLBACK(maj_draw), NULL);
g_signal_connect(G_OBJECT(draw), "motion_notify_event", G_CALLBACK (depl_souris), NULL);
gtk_widget_show(draw);
gtk_widget_show(window);
gtk_main ();
return 0;
}
gboolean maj_draw(GtkWidget *widget, GdkEventExpose *event)
{
GdkPixbuf *dest;
PangoLayout *layout = NULL;
PangoAttrList *attribut = NULL;
//on remplit les attributs et le context
attribut = pango_attr_list_new();
pango_attr_list_insert(attribut, pango_attr_background_new(65530, 65530, 65530));
pango_attr_list_insert(attribut, pango_attr_style_new(PANGO_STYLE_ITALIC));
//on redessine l'écran
dest = gdk_pixbuf_new(GDK_COLORSPACE_RGB, TRUE, 8, 200, 200);
gdk_draw_rectangle(dest, widget->style->fg_gc[GTK_WIDGET_STATE(widget)], TRUE, 0, 0, 200, 200);
gdk_draw_pixbuf(widget->window, widget->style->fg_gc[GTK_WIDGET_STATE(widget)], dest, 0, 0, 0, 0, 200, 200, GDK_RGB_DITHER_NONE, 0, 0);
//on écrit le texte
if(px >= 50 && py >= 50 && px <= 150 && py <= 150)
{
layout = gtk_widget_create_pango_layout(widget, "test");
pango_layout_set_attributes(layout, attribut);
gdk_draw_layout(widget->window,
widget->style->fg_gc[GTK_WIDGET_STATE (widget)],
50,
50,
layout);
}
g_object_unref(dest);
g_object_unref(layout);
pango_attr_list_unref(attribut);
return FALSE;
}
gboolean depl_souris(GtkWidget *widget, GdkEventMotion *event)
{
GdkModifierType state; //état des touches de modification
//on récupère les nouvelles coordonnées et l'état
if(event->is_hint)
{
gdk_window_get_pointer(event->window, &px, &py, &state);
}
else
{
px = event->x;
py = event->y;
state = event->state;
}
gtk_widget_queue_draw(widget);
return TRUE;
}
void quit()
{
exit (0);
} |
