/* examples/canvas/couleur.c */

#include <helium.h>

He_node *princ, *canvas;
int rouge, vert, bleu, gris;

void init_couleurs ()
{
    rouge = HeAllocRgb (255, 0, 0, he_black);
    vert  = HeAllocRgb (0, 255, 0, he_black);
    bleu  = HeAllocRgb (0, 0, 255, he_black);
    gris  = HeAllocRgb (150, 150, 150, he_black);
}

void dessin_ligne (Window win, int x1, int y1, int x2, int y2, int coul)
{
    XSetForeground (he_display, he_gc, coul);
    XDrawLine (he_display, win, he_gc, x1, y1, x2, y2);
}

void canvas_repaint_proc (He_node *hn, Window win)
{
    dessin_ligne (win, 50, 50, 250, 50, rouge);
    dessin_ligne (win, 250, 50, 250, 250, vert);
    dessin_ligne (win, 250, 250, 50, 250, bleu);
    dessin_ligne (win, 50, 250, 50, 50, gris);
}

int main (int argc, char *argv[])
{
    HeInit (&argc, &argv);

    princ = HeCreateFrame();
    HeSetFrameLabel (princ, "carré en couleur");

    canvas = HeCreateCanvas (princ);
    HeSetCanvasRepaintProc (canvas, canvas_repaint_proc);
    init_couleurs ();

    HeSetWidth (canvas, 300); HeSetHeight (canvas, 300);
    HeFit (princ);

    return HeMainLoop (princ);
}