/*!
* \brief
* Creates a Combo box by reading the items table
*
* \param tuid Pointer to the active tuid_t structure
* \param key User input
* \param items The Combo Box table
* \param id Pointer to combo box id (current and returned)
* \param ln The language to use.
*
* * \return ui_return_t
* \arg EXIT_RETURN : Indicates that function returns
* \arg EXIT_STAY : Indicates that functions has not returned
*
* This function can create a Combo box based on the context of a table.
* While the function returns EXIT_STAY it is still in progress. When the function
* is done returns EXIT_RETURN. This assumes that the caller must handle with return
* status in order to continues call or not the function.
*
* For example:
* const combobox_item_t cb [] =
* {
* {{"ITEMS", "ANTIKEIMENA"}, 0}, // <-- Caption with whatever id
* {{"item 1", "antik 1"}, 1}, // <-- item and item's id
* {{"item 2", "antik 2"}, 2}, // " "
* {{"item 3", "antik 3"}, 3}, // " "
* {{0,0},0} // <-- Terminator strings must be NULL
* };
*
* Navigation
* ==========================
* UP -- Previous item on the list (table)
* DOWN -- Next item on the list
* RIGHT -- Selected and return the item.
* LEFT -- Exit with the previous selected item
* ESC -- " " "
*/
__Os__ ui_return_t tui_comboboxd (tuid_t *tuid, int live, int key, combobox_item_t *items, int *id, Lang_en ln)
{
static uint8_t ev=1;
static int cur;
static int vi, vfrm, i, frm;
if (ev) { // It is the first call of combobox
// Find cur in combobox table
for (i=1 ; 1 ; ++i) {
if (!items[i].text[ln]) {
i=1;
break;
}
if (items[i].id == *id)
break;
}
// Print caption
_mk_caption (tuid, items, ln);
// Update counters
cur = vi = vfrm = frm = i;
ev = 0;
}
if (live)
*id = items[i].id;
// UI loop - Navigating
if (key == tuid->keys.UP) { _cmb_prev_item (items, &i); --vi; }
if (key == tuid->keys.DOWN) { _cmb_next_item (items, &i); ++vi; }
if (key == tuid->keys.ESC || key == tuid->keys.LEFT) {
// Restore previous value
*id = items[cur].id;
ev = 1;
return EXIT_RETURN;
}
if (key == tuid->keys.RIGHT || key == tuid->keys.ENTER) {
// Apply the new value
*id = items[i].id;
ev = 1;
return EXIT_RETURN;
}
// Roll frame
if (vi < vfrm) {
vfrm = vi;
frm = i;
}
else if (vi - vfrm>= tuid->frame_buffer.l - 1) {
++vfrm;
_cmb_next_item (items, &frm);
}
// Printing frame
_mk_frame (tuid, items, frm, i, ln);
return EXIT_STAY;
}
/*!
* \brief
* Paints the combobox frame lines in the frame buffer
* \param fb Pointer to the frame buffer
* \param items Pointer to the active combo-box
* \param frame The frame buffer's start position
* \param item The frame buffer's active line
* \param ln The language to use
* \return none
*/
__Os__ void _cmb_frame_lines (fb_t *fb, combobox_item_t *items, int frame, int item, Lang_en ln)
{
#define _LINE(_l) (fb->c*(_l))
int line, offset;
int start;
char post;
// Print each line
start = frame;
for (line=1 ; line < fb->l ; ++line) {
offset=0;
if (frame == item) {
offset = sprintf ((char*)&fb->fb[_LINE(line)], "[%s", (char*)items[frame].text[ln]);
post = ']';
}
else {
offset = sprintf ((char*)&fb->fb[_LINE(line)], "%s", (char*)items[frame].text[ln]);
post = ' ';
}
// discard null termination inside frame buffer
fb->fb[_LINE(line)+offset] = post;
// Escape if no items left
_cmb_next_item (items, &frame);
if (frame == start)
break;
}
#undef _LINE
}
