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Allow more items on screen in a listbox

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This commit is contained in:
Kp 2018-06-18 04:11:39 +00:00
parent 6f4270ecd8
commit c8b04d0c83
1 changed files with 28 additions and 15 deletions
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43
similar/main/newmenu.cpp
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@ -1681,6 +1681,7 @@ struct listbox : embed_window_pointer_t
int allow_abort_flag;
listbox_subfunction_t<void> listbox_callback;
unsigned nitems;
unsigned items_on_screen;
int citem, first_item;
int box_w, height, box_x, box_y, title_height;
short swidth, sheight;
@ -1731,20 +1732,26 @@ static void update_scroll_position(listbox *lb)
if (lb->citem< lb->first_item)
lb->first_item = lb->citem;
if (lb->citem>=( lb->first_item+LB_ITEMS_ON_SCREEN))
lb->first_item = lb->citem-LB_ITEMS_ON_SCREEN+1;
if (lb->citem >= lb->items_on_screen)
{
if (lb->first_item <= lb->citem - lb->items_on_screen)
lb->first_item = lb->citem - lb->items_on_screen + 1;
}
if (lb->nitems <= LB_ITEMS_ON_SCREEN )
if (lb->nitems <= lb->items_on_screen)
lb->first_item = 0;
if (lb->first_item>lb->nitems-LB_ITEMS_ON_SCREEN)
lb->first_item = lb->nitems-LB_ITEMS_ON_SCREEN;
if (lb->nitems >= lb->items_on_screen)
{
if (lb->first_item > lb->nitems - lb->items_on_screen)
lb->first_item = lb->nitems - lb->items_on_screen;
}
if (lb->first_item < 0 ) lb->first_item = 0;
}
static window_event_result listbox_mouse(window *, const d_event &event, listbox *lb, int button)
{
int i, mx, my, mz, x1, x2, y1, y2;
int mx, my, mz, x1, x2, y1, y2;
switch (button)
{
@ -1754,7 +1761,8 @@ static window_event_result listbox_mouse(window *, const d_event &event, listbox
{
mouse_get_pos(&mx, &my, &mz);
const auto &&line_spacing = LINE_SPACING(*grd_curcanv->cv_font, *GAME_FONT);
for (i=lb->first_item; i<lb->first_item+LB_ITEMS_ON_SCREEN; i++ ) {
for (int i = lb->first_item; i < lb->first_item + lb->items_on_screen; ++i)
{
if (i >= lb->nitems)
break;
int h;
@ -1850,11 +1858,11 @@ static window_event_result listbox_key_command(window *, const d_event &event, l
break;
case KEY_PAGEDOWN:
case KEY_PAD3:
lb->citem += LB_ITEMS_ON_SCREEN;
lb->citem += lb->items_on_screen;
break;
case KEY_PAGEUP:
case KEY_PAD9:
lb->citem -= LB_ITEMS_ON_SCREEN;
lb->citem -= lb->items_on_screen;
break;
case KEY_ESC:
if (lb->allow_abort_flag) {
@ -1911,7 +1919,6 @@ static void listbox_create_structure( listbox *lb)
if ( w > lb->box_w )
lb->box_w = w + fspacx(10);
}
lb->height = LINE_SPACING(medium3_font, *GAME_FONT) * LB_ITEMS_ON_SCREEN;
{
int w, h;
@ -1932,10 +1939,17 @@ static void listbox_create_structure( listbox *lb)
lb->marquee->lasttime = timer_query();
}
const auto &&line_spacing = LINE_SPACING(medium3_font, *GAME_FONT);
const unsigned bordery2 = BORDERY * 2;
const auto items_on_screen = std::max<unsigned>(
std::min<unsigned>(((canvas.cv_bitmap.bm_h - bordery2 - lb->title_height) / line_spacing) - 2, lb->nitems),
LB_ITEMS_ON_SCREEN);
lb->items_on_screen = items_on_screen;
lb->height = line_spacing * items_on_screen;
lb->box_x = (canvas.cv_bitmap.bm_w - lb->box_w) / 2;
lb->box_y = (canvas.cv_bitmap.bm_h - (lb->height + lb->title_height)) / 2 + lb->title_height;
if ( lb->box_y < lb->title_height )
lb->box_y = lb->title_height;
if (lb->box_y < bordery2)
lb->box_y = bordery2;
if ( lb->citem < 0 ) lb->citem = 0;
if ( lb->citem >= lb->nitems ) lb->citem = 0;
@ -1952,8 +1966,6 @@ static void listbox_create_structure( listbox *lb)
static window_event_result listbox_draw(window *, listbox *lb)
{
int i;
if (lb->swidth != SWIDTH || lb->sheight != SHEIGHT || lb->fntscalex != FNTScaleX || lb->fntscaley != FNTScaleY)
listbox_create_structure ( lb );
@ -1964,7 +1976,8 @@ static window_event_result listbox_draw(window *, listbox *lb)
gr_string(canvas, medium3_font, 0x8000, lb->box_y - lb->title_height, lb->title);
const auto &&line_spacing = LINE_SPACING(medium3_font, *GAME_FONT);
for (i=lb->first_item; i<lb->first_item+LB_ITEMS_ON_SCREEN; i++ ) {
for (int i = lb->first_item; i < lb->first_item + lb->items_on_screen; ++i)
{
int y = (i - lb->first_item) * line_spacing + lb->box_y;
const auto &&fspacx = FSPACX();
const auto &&fspacy = FSPACY();