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#include <assert.h>
#include <string.h>
#include "microui.h"
#include "widget.h"
#include "unit.h"
#include "engine.h"
#include "ui.h"
#define nelem(arr) (sizeof(arr)/sizeof(arr[0]))
static const char *const displacement_units[] = {"cc", "l", "ci"};
static Volume (*displacement_converters[nelem(displacement_units)])(double) = {
cubic_centimetre, litre, cubic_inch,
};
static const char *const map_units[] = {"mbar", "kPa", "bar", "psi"};
void
init_ui(UI *ui) {
w_init_field(&ui->displacement);
w_init_select(&ui->displacement_unit, nelem(displacement_units), displacement_units);
ui->npoints = 1;
w_init_field(&ui->rpm[0]);
w_init_field(&ui->map[0]);
w_init_select(&ui->map_unit, nelem(map_units), map_units);
w_init_field(&ui->ve[0]);
init_engine(&ui->points[0]);
}
void
set_displacement(UI *ui) {
int idx, i;
Volume (*convert)(double), disp;
idx = ui->displacement_unit.idx;
assert(idx >= 0 && (long unsigned int) idx < nelem(displacement_units));
convert = displacement_converters[idx];
disp = convert(ui->displacement.value);
for (i = 0; i < ui->npoints; i++) {
ui->points[i].displacement = disp;
}
}
void
insert_point(UI *ui, int idx) {
int i;
if (idx < 0 || idx >= ui->npoints || ui->npoints >= MAX_POINTS) {
return;
}
for (i = ui->npoints; i > idx; i--) {
memmove(&ui->rpm[i], &ui->rpm[i-1], sizeof(ui->rpm[i-1]));
memmove(&ui->map[i], &ui->map[i-1], sizeof(ui->map[i-1]));
memmove(&ui->ve[i], &ui->ve[i-1], sizeof(ui->ve[i-1]));
memmove(&ui->points[i], &ui->points[i-1], sizeof(ui->points[i-1]));
}
ui->npoints++;
}
void
remove_point(UI *ui, int idx) {
if (idx < 0 || idx >= ui->npoints || ui->npoints <= 1) {
return;
}
for (; idx < ui->npoints-1; idx++) {
memmove(&ui->rpm[idx], &ui->rpm[idx+1], sizeof(ui->rpm[idx]));
memmove(&ui->map[idx], &ui->map[idx+1], sizeof(ui->map[idx]));
memmove(&ui->ve[idx], &ui->ve[idx+1], sizeof(ui->ve[idx]));
memmove(&ui->points[idx], &ui->points[idx+1], sizeof(ui->points[idx]));
}
ui->npoints--;
}
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