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jlist: add background/inversion selection feature

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Lephenixnoir 2024-09-04 08:46:26 +02:00
parent 0c8371edce
commit 3488c6515a
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GPG key ID: 1BBA026E13FC0495
2 changed files with 24 additions and 10 deletions
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10
include/justui/jlist.h
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@ -9,10 +9,12 @@
#include <justui/jwidget.h> #include <justui/jwidget.h>
typedef enum { typedef enum {
/* Selected item is styled by the paint function or delegate */
JLIST_SELECTION_MANUAL = 0,
/* Selected item is indicated by inverting its rendered area */ /* Selected item is indicated by inverting its rendered area */
JLIST_SELECTION_INVERT = 0, JLIST_SELECTION_INVERT = 1,
/* Selected item is indicated by applying a background color */ /* Selected item is indicated by applying a background color */
JLIST_SELECTION_BACKGROUND = 1, JLIST_SELECTION_BACKGROUND = 2,
} jlist_selection_style; } jlist_selection_style;
@ -23,6 +25,10 @@ typedef struct {
bool selectable; bool selectable;
/* Whether item can be triggered */ /* Whether item can be triggered */
bool triggerable; bool triggerable;
/* Selection style for jlist to draw */
int8_t selection_style;
/* Selection background color for JLIST_SELECTION_BACKGROUND */
uint16_t selection_bg_color;
/* The following fields are only applicable if there is no delegate. */ /* The following fields are only applicable if there is no delegate. */

24
src/jlist.c
View file

@ -193,16 +193,24 @@ static void jlist_poly_render(void *l0, int x, int y)
for(int i = 0; i < l->item_count; i++) { for(int i = 0; i < l->item_count; i++) {
jlist_item_info *info = &l->items[i]; jlist_item_info *info = &l->items[i];
bool selected = (l->cursor == i);
if(info->delegate) { int h = info->delegate
? jwidget_full_height(info->delegate)
: info->natural_height;
if(selected && info->selection_style == JLIST_SELECTION_BACKGROUND)
drect(x1, y, x2, y + h - 1, info->selection_bg_color);
if(info->delegate)
jwidget_render(info->delegate, x1, y); jwidget_render(info->delegate, x1, y);
y += jwidget_full_height(info->delegate); else
} l->paint_function(x1, y, x2-x1+1, h, l, i, selected);
else {
l->paint_function(x1, y, x2-x1+1, info->natural_height, l, i, if(selected && info->selection_style == JLIST_SELECTION_INVERT)
l->cursor == i); drect(x1, y, x2, y + h - 1, C_INVERT);
y += info->natural_height;
} y += h;
} }
} }