/* demo2g.c : demos de EZ-Draw reecrits en gtk+ 2.x
 *
 * Edouard.Thiel@lif.univ-mrs.fr - 13/05/2009 - version 0.9
 *
 * Compilation sous Unix :
 *     gcc -Wall demo2g.c ez-gtk.c -o demo2g `pkg-config gtk+-2.0 --cflags --libs`
 *
 * This program is free software under the terms of the
 * GNU Lesser General Public License (LGPL) version 2.1.
*/

#include "ez-gtk.h"


/*
 * Appele'e par gtk_main lorsqu'il faut tout redessiner.
*/

gint area1_onExpose (GtkWidget *widget, GdkEventExpose *ev)
{
    /* On recupere le contexte graphique associe' au widget */
    GdkGC *gc = ezg_get_gc (widget);

    /* On cree un layout pour dessiner du texte */
    PangoLayout *layout = gtk_widget_create_pango_layout (widget, NULL);

    /* On dessine le fond en blanc */
    ezg_set_color (gc, EZG_WHITE);
    gdk_draw_rectangle (widget->window, gc, TRUE, 0, 0, 
        widget->allocation.width, widget->allocation.height);

    ezg_set_color (gc, EZG_MAGENTA);
    ezg_draw_text      (widget, gc, layout, EZG_BL, 10, 20, "draw epaisseur 1 :");
    ezg_set_thick (gc, 1);
    gdk_draw_point     (widget->window, gc, 30, 50);
    gdk_draw_line      (widget->window, gc, 60, 35, 130, 70);
    gdk_draw_rectangle (widget->window, gc, FALSE, 160, 30, 220-160, 70-30);
    gdk_draw_arc       (widget->window, gc, FALSE, 240, 30, 300-240, 70-30, 0, 360*64);
    ezg_draw_triangle  (widget->window, gc, FALSE, 320, 30, 380, 40, 350, 70);

    ezg_set_color (gc, EZG_BLACK);
    ezg_draw_text      (widget, gc, layout, EZG_BL, 10, 100, "draw epaisseur 2 :");
    ezg_set_color (gc, EZG_CYAN);
    ezg_set_thick (gc, 2);
    gdk_draw_arc       (widget->window, gc, TRUE, 30-1, 130-1, 2+1, 2+1, 0, 360*64);
    gdk_draw_line      (widget->window, gc, 60, 115, 130, 150);
    gdk_draw_rectangle (widget->window, gc, FALSE, 160, 110, 220-160, 150-110);
    gdk_draw_arc       (widget->window, gc, FALSE, 240, 110, 300-240, 150-110, 0, 360*64);
    ezg_draw_triangle  (widget->window, gc, FALSE, 320, 110, 380, 120, 350, 150);

    ezg_set_color (gc, EZG_BLUE);
    ezg_draw_text      (widget, gc, layout, EZG_BL, 10, 180, "draw epaisseur 9 :");
    ezg_set_color (gc, EZG_GREEN);
    ezg_set_thick (gc, 9);
    gdk_draw_arc       (widget->window, gc, TRUE, 30-4, 210-4, 9+1, 9+1, 0, 360*64);
    gdk_draw_line      (widget->window, gc, 60, 195, 130, 230);
    gdk_draw_rectangle (widget->window, gc, FALSE, 160, 190, 220-160, 230-190);
    gdk_draw_arc       (widget->window, gc, FALSE, 240, 190, 300-240, 230-190, 0, 360*64);
    ezg_draw_triangle  (widget->window, gc, FALSE, 320, 190, 380, 200, 350, 230);

    ezg_set_color (gc, EZG_RED);
    ezg_draw_text      (widget, gc, layout, EZG_BL, 10, 260, "fill :");
    ezg_set_color (gc, EZG_YELLOW);
    gdk_draw_rectangle (widget->window, gc, TRUE, 160, 270, 220-160+1, 310-270+1);
    gdk_draw_arc       (widget->window, gc, TRUE, 240, 270, 300-240+1, 310-270+1, 0, 360*64);
    ezg_draw_triangle  (widget->window, gc, TRUE, 320, 270, 380, 280, 350, 310);

    /* Libere la memoire */
    g_object_unref (G_OBJECT (layout));

    return TRUE;  /* L'evenement a ete traite' */
}


/*
 * Appele'e par gtk_main lorsqu'une touche a ete presse'e.
*/

gint area1_onKeyPress (GtkWidget *widget, GdkEventKey *ev)
{
    /* ev->keyval contient le symbole de la touche pressee */
    switch (ev->keyval) {
        case GDK_q : gtk_main_quit (); break;  /* touche 'q' */
    }

    return TRUE;  /* L'evenement a ete traite' */
}


int main (int argc, char *argv[])
{
    GtkWidget *win1, *area1;

    /* Initialise gtk et analyse la ligne de commande */
    gtk_init (&argc, &argv);
 
    /* Cree une fenetre, donne un titre et une taille */
    win1 = ezg_window_create (400, 320, "Demo 2g : tous les dessins");

    /* La destruction de la fenetre fera sortir de gtk_main */
    g_signal_connect (G_OBJECT (win1), "destroy", gtk_main_quit, NULL);

    /* On cree une zone de dessin, qui prend toute la place dans la fenetre */
    area1 = ezg_area_create (win1);

    /* On autorise certains evenements */
    GTK_WIDGET_SET_FLAGS  (area1, GTK_CAN_FOCUS);
    gtk_widget_set_events (area1, GDK_EXPOSURE_MASK | GDK_KEY_PRESS_MASK);

    /* On attache des callbacks pour gerer certains evenements */
    g_signal_connect (G_OBJECT (area1), "expose_event"   , G_CALLBACK (area1_onExpose)  , NULL);
    g_signal_connect (G_OBJECT (area1), "key_press_event", G_CALLBACK (area1_onKeyPress), NULL);

    /* Rend visibles la fenetre et son contenu */
    gtk_widget_show_all (win1);

    /* Boucle d'evenements qui fait "vivre" la fenetre */
    gtk_main ();

    exit (0);
}