137 lines
3.6 KiB
Plaintext
137 lines
3.6 KiB
Plaintext
module ugui;
|
|
|
|
import std::io;
|
|
import std::math;
|
|
|
|
// slider element
|
|
struct ElemSlider {
|
|
Rect handle;
|
|
}
|
|
|
|
|
|
/* handle
|
|
* +----+-----+---------------------+
|
|
* | |#####| |
|
|
* +----+-----+---------------------+
|
|
*/
|
|
macro Ctx.slider_hor(&ctx, Rect size, float* value, float hpercent = 0.25, ...)
|
|
=> ctx.slider_hor_id(@compute_id($vasplat), size, value, hpercent);
|
|
<*
|
|
@require value != null
|
|
*>
|
|
fn ElemEvents? Ctx.slider_hor_id(&ctx, Id id, Rect size, float* value, float hpercent = 0.25)
|
|
{
|
|
id = ctx.gen_id(id)!;
|
|
|
|
Elem* parent = ctx.get_parent()!;
|
|
Elem* elem = ctx.get_elem(id, ETYPE_SLIDER)!;
|
|
Style* style = ctx.styles.get_style(@str_hash("slider"));
|
|
|
|
// 2. Layout
|
|
elem.bounds = ctx.position_element(parent, size, style);
|
|
if (elem.bounds.is_null()) return {};
|
|
Rect content_bounds = elem.content_bounds(style);
|
|
|
|
// handle width
|
|
short hw = (short)(content_bounds.w * hpercent);
|
|
Rect handle = {
|
|
.x = calc_slider(content_bounds.x, content_bounds.w-hw, *value),
|
|
.y = content_bounds.y,
|
|
.w = hw,
|
|
.h = content_bounds.h,
|
|
};
|
|
elem.slider.handle = handle;
|
|
|
|
Point m = ctx.input.mouse.pos;
|
|
elem.events = ctx.get_elem_events(elem);
|
|
|
|
if (ctx.elem_focus(elem) && ctx.is_mouse_down(BTN_LEFT)) {
|
|
*value = calc_value(content_bounds.x, m.x, content_bounds.w, hw);
|
|
elem.slider.handle.x = calc_slider(content_bounds.x, content_bounds.w-hw, *value);
|
|
elem.events.update = true;
|
|
}
|
|
|
|
// Draw the slider background and handle
|
|
Style s = *style;
|
|
Rect padding = s.padding;
|
|
s.padding = {};
|
|
ctx.push_rect(elem.bounds, parent.div.z_index, &s)!;
|
|
s.bg = s.primary;
|
|
s.padding = padding;
|
|
s.border = {};
|
|
ctx.push_rect(elem.slider.handle, parent.div.z_index, &s)!;
|
|
|
|
return elem.events;
|
|
}
|
|
|
|
|
|
/*
|
|
* +--+
|
|
* | |
|
|
* | |
|
|
* +--+
|
|
* |##| handle
|
|
* |##|
|
|
* +--+
|
|
* | |
|
|
* | |
|
|
* +--+
|
|
*/
|
|
macro Ctx.slider_ver(&ctx, Rect size, float* value, float hpercent = 0.25, ...)
|
|
=> ctx.slider_ver_id(@compute_id($vasplat), size, value, hpercent);
|
|
fn ElemEvents? Ctx.slider_ver_id(&ctx, Id id, Rect size, float* value, float hpercent = 0.25)
|
|
{
|
|
id = ctx.gen_id(id)!;
|
|
|
|
Elem *parent = ctx.get_parent()!;
|
|
Elem *elem = ctx.get_elem(id, ETYPE_SLIDER)!;
|
|
Style* style = ctx.styles.get_style(@str_hash("slider"));
|
|
|
|
// 1. Fill the element fields
|
|
if (elem.flags.is_new) {
|
|
elem.type = ETYPE_SLIDER;
|
|
} else if (elem.type != ETYPE_SLIDER) {
|
|
return WRONG_ELEMENT_TYPE?;
|
|
}
|
|
|
|
// 2. Layout
|
|
elem.bounds = ctx.position_element(parent, size, style);
|
|
if (elem.bounds.is_null()) return {};
|
|
Rect content_bounds = elem.content_bounds(style);
|
|
|
|
// handle height
|
|
short hh = (short)(content_bounds.h * hpercent);
|
|
Rect handle = {
|
|
.x = content_bounds.x,
|
|
.y = calc_slider(content_bounds.y, content_bounds.h-hh, *value),
|
|
.w = content_bounds.w,
|
|
.h = hh,
|
|
};
|
|
elem.slider.handle = handle;
|
|
|
|
Point m = ctx.input.mouse.pos;
|
|
elem.events = ctx.get_elem_events(elem);
|
|
|
|
if (ctx.elem_focus(elem) && ctx.is_mouse_down(BTN_LEFT)) {
|
|
*value = calc_value(content_bounds.y, m.y, content_bounds.h, hh);
|
|
elem.slider.handle.y = calc_slider(content_bounds.y, content_bounds.h-hh, *value);
|
|
elem.events.update = true;
|
|
}
|
|
|
|
// Draw the slider background and handle
|
|
Style s = *style;
|
|
Rect padding = s.padding;
|
|
s.padding = {};
|
|
ctx.push_rect(elem.bounds, parent.div.z_index, &s)!;
|
|
s.bg = s.primary;
|
|
s.padding = padding;
|
|
s.border = {};
|
|
ctx.push_rect(elem.slider.handle, parent.div.z_index, &s)!;
|
|
|
|
return elem.events;
|
|
}
|
|
|
|
macro short calc_slider(short off, short dim, float value) => (short)off + (short)(dim * value);
|
|
macro float calc_value(short off, short mouse, short dim, short slider)
|
|
=> math::clamp((float)(mouse-off-slider/2)/(float)(dim-slider), 0.0f, 1.0f);
|