#include "graph.h"

struct Gadget *MinorMode;

static void EnableGad(struct Gadget *gad)
{
    SnipAllBut(gad);
    OnGadget(gad, wG, NULL);  /* does a refresh */
    RestoreGads();
}

static void DisableGad(struct Gadget *gad)
{
    SnipAllBut(gad);
    OffGadget(gad, wG, NULL);  /* does a refresh */
    RestoreGads();
}

void enable_minor_grid(void)
{
    EnableGad(&Minor_Thickness);
    EnableGad(&minor_x);
    EnableGad(&minor_y);
    EnableGad(&minor_slider_left);
    EnableGad(&minor_slider_middle);
    EnableGad(&minor_slider_right);
}

void disable_minor_grid(void)
{
    DisableGad(&Minor_Thickness);
    DisableGad(&minor_x);
    DisableGad(&minor_y);
    DisableGad(&minor_slider_left);
    DisableGad(&minor_slider_middle);
    DisableGad(&minor_slider_right);
}

static void turn_off(struct Gadget *gad)
{
    gad->Flags &= ~SELECTED;
    RefreshOneGad(gad);
}

void turnoff_others(struct Gadget *which)
{
   if (which != &None  ) turn_off(&None);
   if (which != &Linear) turn_off(&Linear);
   if (which != &LogX  ) turn_off(&LogX);
   if (which != &LogY  ) turn_off(&LogY);
   if (which != &LogLog) turn_off(&LogLog);
}

void enter(struct Gadget *gad, char *name)
{
    MinorMode = gad;
    if (!(gad->Flags & SELECTED)) {
        /* was on - don't allow direct turn off */
        /* turn it back on */
        gad->Flags |= SELECTED;
    }
    sprintf(messagebuf, "Minor Grid: %s", name);
    message(messagebuf);
    turnoff_others(gad);
}

void MG_None(APTR object)
{
  enter(&None, "None");
  disable_minor_grid();
}

void MG_Linear(APTR object)
{
  enter(&Linear, "Linear");
  enable_minor_grid();
}

void MG_LogX(APTR object)
{
  enter(&LogX, "LogX");
  enable_minor_grid();
}

void MG_LogY(APTR object)
{
  enter(&LogY, "LogY");
  enable_minor_grid();
}

void MG_LogLog(APTR object)
{
  enter(&LogLog, "LogLog");
  enable_minor_grid();
}


/* initialize - enable only the Linear button */
void button_init(void)
{
   MG_Linear(NULL);
}