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scrollbar fixup

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This commit is contained in:
Alessandro Mauri 2024-12-19 00:29:30 +01:00
parent a481269022
commit 601a396aa8
2 changed files with 46 additions and 36 deletions
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60
src/ugui_div.c3
View File

@ -3,23 +3,22 @@ module ugui;
import std::io;
import std::math;
enum DivLayout {
LAYOUT_ROW,
LAYOUT_COLUMN,
LAYOUT_FLOATING,
LAYOUT_ABSOLUTE,
}
const short SCROLLBAR_DIM = 5;
// div element
struct ElemDiv {
DivLayout layout;
struct scroll {
bool can_x;
bool can_y;
bool on_x;
bool on_y;
float value_x;
float value_y;
Layout layout;
struct scroll_x {
bool enabled;
bool on;
bool focus;
float value;
}
struct scroll_y {
bool enabled;
bool on;
bool focus;
float value;
}
Rect children_bounds; // current frame children bounds
Rect pcb; // previous frame children bounds
@ -43,8 +42,8 @@ fn void! Ctx.div_begin(&ctx, String label, Rect size, bool scroll_x = false, boo
} else if (c_elem.type != ETYPE_DIV) {
return UgError.WRONG_ELEMENT_TYPE?;
}
c_elem.div.scroll.can_x = scroll_x;
c_elem.div.scroll.can_y = scroll_y;
c_elem.div.scroll_x.enabled = scroll_x;
c_elem.div.scroll_y.enabled = scroll_y;
// 2. layout the element
c_elem.bounds = ctx.position_element(parent, size);
@ -103,34 +102,37 @@ fn void! Ctx.div_end(&ctx)
// set the scrollbar flag, is used in layout
// vertical overflow
c_elem.div.scroll.on_y = cbc.y > bc.y && c_elem.div.scroll.can_y;
// horizontal overflow
c_elem.div.scroll.on_x = cbc.x > bc.x && c_elem.div.scroll.can_x;
c_elem.div.scroll_x.on = cbc.x > bc.x && c_elem.div.scroll_x.enabled;
// vertical overflow
c_elem.div.scroll_y.on = cbc.y > bc.y && c_elem.div.scroll_y.enabled;
if (c_elem.div.scroll.on_y) {
short wdim = c_elem.div.scroll_y.focus ? SCROLLBAR_DIM*3 : SCROLLBAR_DIM;
short hdim = c_elem.div.scroll_x.focus ? SCROLLBAR_DIM*3 : SCROLLBAR_DIM;
if (c_elem.div.scroll_y.on) {
Rect vslider = {
.x = c_elem.bounds.x + c_elem.bounds.w - 10,
.x = c_elem.bounds.x + c_elem.bounds.w - wdim,
.y = c_elem.bounds.y,
.w = 10,
.w = wdim,
.h = c_elem.bounds.h,
};
DivLayout prev_l = c_elem.div.layout;
Layout prev_l = c_elem.div.layout;
c_elem.div.layout = LAYOUT_ABSOLUTE;
ctx.slider_ver("div_scrollbar_vertical", vslider, &c_elem.div.scroll.value_y, max((float)bc.y / cbc.y, (float)0.15))!;
ctx.slider_ver("div_scrollbar_vertical", vslider, &c_elem.div.scroll_y.value, max((float)bc.y / cbc.y, (float)0.15))!;
c_elem.div.layout = prev_l;
}
if (c_elem.div.scroll.on_x) {
if (c_elem.div.scroll_x.on) {
Rect hslider = {
.x = c_elem.bounds.x,
.y = c_elem.bounds.y + c_elem.bounds.h - 10,
.y = c_elem.bounds.y + c_elem.bounds.h - hdim,
.w = c_elem.bounds.w,
.h = 10,
.h = hdim,
};
DivLayout prev_l = c_elem.div.layout;
Layout prev_l = c_elem.div.layout;
c_elem.div.layout = LAYOUT_ABSOLUTE;
ctx.slider_hor("div_scrollbar_horizontal", hslider, &c_elem.div.scroll.value_x, max((float)bc.x / cbc.x, (float)0.15))!;
ctx.slider_hor("div_scrollbar_horizontal", hslider, &c_elem.div.scroll_x.value, max((float)bc.x / cbc.x, (float)0.15))!;
c_elem.div.layout = prev_l;
}

22
src/ugui_layout.c3
View File

@ -1,5 +1,11 @@
module ugui;
enum Layout {
LAYOUT_ROW,
LAYOUT_COLUMN,
LAYOUT_FLOATING,
LAYOUT_ABSOLUTE,
}
fn void! Ctx.layout_set_row(&ctx)
{
@ -139,19 +145,21 @@ fn Rect Ctx.position_element(&ctx, Elem *parent, Rect rect, bool style = false)
};
// 4. Calculate the "scrolled" view
Point off;
Rect off;
Rect* cb = &div.children_bounds;
if (div.scroll.can_x && div.scroll.on_x) {
off.x = (short)((float)(div.pcb.w - parent.bounds.w) * div.scroll.value_x);
if (div.scroll_x.enabled && div.scroll_x.on) {
off.x = (short)((float)(div.pcb.w - parent.bounds.w) * div.scroll_x.value);
off.w = SCROLLBAR_DIM;
}
if (div.scroll.can_y && div.scroll.on_y) {
off.y = (short)((float)(div.pcb.h - parent.bounds.h) * div.scroll.value_y);
if (div.scroll_y.enabled && div.scroll_y.on) {
off.y = (short)((float)(div.pcb.h - parent.bounds.h) * div.scroll_y.value);
off.h = SCROLLBAR_DIM;
}
Rect view = {
.x = parent.bounds.x + off.x,
.y = parent.bounds.y + off.y,
.w = parent.bounds.w,
.h = parent.bounds.h,
.w = parent.bounds.w - off.w,
.h = parent.bounds.h - off.h,
};
// 5. check if the placement overflows the children ounds, if so update them