/* examples/glarea/resize.c */

#include <heliumGL.h>

He_node *princ, *glarea;

void princ_resize (He_node *hn, int width, int height)
{
    HeExpand(glarea, NULL, HE_BOTTOM_RIGHT);
}

void glarea_init_proc (He_node *hn)
{
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    gluOrtho2D(0,100, 0,100);

    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
}

void glarea_repaint_proc (He_node *hn)
{
    glClearColor(0,0,0,1);
    glClear(GL_COLOR_BUFFER_BIT);

    glColor3f(1,0,0);
    glBegin(GL_TRIANGLES);
    glVertex2f(10,10);
    glVertex2f(10,90);
    glVertex2f(90,90);
    glEnd();

    glColor3f(0,0.5,0.75);
    glBegin(GL_TRIANGLES);
    glVertex2f(20,10);
    glVertex2f(50,40);
    glVertex2f(90,20);
    glEnd();
}

int main (int argc, char *argv[])
{
    int attr_list[] = { GLX_RGBA, None };

    HeInit (&argc, &argv);

    princ = HeCreateFrame();
    HeSetFrameLabel (princ, "Resize et proportions");
    HeSetFrameResizeProc (princ, princ_resize);

    glarea = HeCreateGLArea (princ, attr_list, NULL);
    HeSetWidth (glarea, 500);
    HeSetHeight (glarea, 400);
    HeSetGLAreaInitProc (glarea, glarea_init_proc);
    HeSetGLAreaRepaintProc (glarea, glarea_repaint_proc);
    /* ici on laisse la ResizeProc par défaut du GLArea */

    HeFit (princ);

    return HeMainLoop (princ);
}