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work on div sliders, major changes

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* Ids are now keyed based on the parent's id, this means that an element can have
  the same label when placed in different divs
* Divs now enable the scissor test, this way the elements cannot draw outside of
  the parent div bounds
* Introduced a LAYOUT_ABSOLUTE that disables all layout logic, for internal use
* Divs now draw scrollbars using the slider_hor and slider_ver elements
c3
Alessandro Mauri 1 week ago
parent 499f6dc79b
commit a481269022
8 changed files with 86 additions and 121 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 18
      src/main.c3
  2. 14
      src/ugui_button.c3
  3. 2
      src/ugui_cmd.c3
  4. 17
      src/ugui_core.c3
  5. 98
      src/ugui_div.c3
  6. 8
      src/ugui_layout.c3
  7. 48
      src/ugui_slider.c3
  8. 2
      src/ugui_text.c3

18
src/main.c3
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@ -150,18 +150,18 @@ fn int main(String[] args)
{|
ui.layout_set_column()!!;
static float slider2 = 0.5;
if (ui.slider_ver("slider_other", ugui::Rect{0,0,30,100}, &slider2)!!.update) {
if (ui.slider_ver("slider", ugui::Rect{0,0,30,100}, &slider2)!!.update) {
io::printfn("other slider: %f", slider2);
}
ui.button("button10", ugui::Rect{0,0,50,50})!!;
ui.button("button11", ugui::Rect{0,0,50,50})!!;
ui.button("button12", ugui::Rect{0,0,50,50})!!;
ui.button("button13", ugui::Rect{0,0,50,50})!!;
ui.button("button0", ugui::Rect{0,0,50,50})!!;
ui.button("button1", ugui::Rect{0,0,50,50})!!;
ui.button("button2", ugui::Rect{0,0,50,50})!!;
ui.button("button3", ugui::Rect{0,0,50,50})!!;
if (toggle) {
ui.button("button14", ugui::Rect{0,0,50,50})!!;
ui.button("button15", ugui::Rect{0,0,50,50})!!;
ui.button("button16", ugui::Rect{0,0,50,50})!!;
ui.button("button17", ugui::Rect{0,0,50,50})!!;
ui.button("button4", ugui::Rect{0,0,50,50})!!;
ui.button("button5", ugui::Rect{0,0,50,50})!!;
ui.button("button6", ugui::Rect{0,0,50,50})!!;
ui.button("button7", ugui::Rect{0,0,50,50})!!;
}
ui.layout_next_column()!!;
ui.layout_set_row()!!;

14
src/ugui_button.c3
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@ -8,27 +8,19 @@ struct ElemButton {
bool active;
}
const Elem BUTTON_DEFAULTS = {
.type = ETYPE_BUTTON,
.button = {
.color = uint_to_rgba(0x0000ffff),
},
};
// draw a button, return the events on that button
fn ElemEvents! Ctx.button(&ctx, String label, Rect size, bool state = false)
{
Id id = label.hash();
Id id = ctx.gen_id(label)!;
Elem *parent = ctx.get_parent()!;
Elem *c_elem = ctx.get_elem(id)!;
// add it to the tree
ctx.tree.add(id, ctx.active_div)!;
bool needs_layout = c_elem.flags.is_new || parent.flags.updated;
if (c_elem.flags.is_new) {
*c_elem = BUTTON_DEFAULTS;
c_elem.type = ETYPE_BUTTON;
c_elem.button.color = uint_to_rgba(0x0000ffff);
} else if (c_elem.type != ETYPE_BUTTON) {
return UgError.WRONG_ELEMENT_TYPE?;
}

2
src/ugui_cmd.c3
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@ -171,7 +171,7 @@ fn void! Ctx.push_scissor(&ctx, Rect rect)
{
Cmd sc = {
.type = CMD_SCISSOR,
.scissor.rect = rect,
.scissor.rect = rect.intersection(ctx.div_scissor),
};
ctx.cmd_queue.enqueue(&sc)!;
}

17
src/ugui_core.c3
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@ -99,12 +99,6 @@ const uint MAX_ELEMS = 128;
const uint MAX_CMDS = 256;
const uint ROOT_ID = 1;
enum Layout {
ROW,
COLUMN,
FLOATING
}
// global style, similar to the css box model
struct Style { // css box model
Rect padding;
@ -118,7 +112,6 @@ struct Style { // css box model
struct Ctx {
Layout layout;
IdTree tree;
ElemCache cache;
CmdQueue cmd_queue;
@ -141,6 +134,7 @@ struct Ctx {
}
}
Rect div_scissor;
isz active_div; // tree node indicating the current active div
}
@ -180,6 +174,12 @@ fn Elem*! Ctx.get_parent(&ctx)
return ctx.cache.search(parent_id);
}
macro Id! Ctx.gen_id(&ctx, String label)
{
Id parent_id = ctx.tree.get(ctx.active_div)!;
return parent_id ^ label.hash();
}
// get or push an element from the cache, return a pointer to it
// resets all flags except is_new which is set accordingly
macro Ctx.get_elem(&ctx, Id id)
@ -218,7 +218,6 @@ fn void! Ctx.init(&ctx)
ctx.cmd_queue.init(MAX_ELEMENTS)!;
defer catch { (void)ctx.cmd_queue.free(); }
ctx.layout = Layout.ROW;
ctx.active_div = 0;
// TODO: add style config
@ -275,6 +274,8 @@ fn void! Ctx.frame_begin(&ctx)
// 3. Push the root element into the element tree
ctx.active_div = ctx.tree.add(ROOT_ID, 0)!;
ctx.div_scissor = {0, 0, ctx.width, ctx.height};
// The root element does not push anything to the stack
// TODO: add a background color taken from a theme or config
}

98
src/ugui_div.c3
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@ -7,6 +7,7 @@ enum DivLayout {
LAYOUT_ROW,
LAYOUT_COLUMN,
LAYOUT_FLOATING,
LAYOUT_ABSOLUTE,
}
// div element
@ -26,19 +27,9 @@ struct ElemDiv {
Color bgcolor;
}
const Elem DIV_DEFAULTS = {
.type = ETYPE_DIV,
.div = {
.scroll.can_x = false,
.scroll.can_y = false,
.scroll.value_x = 0,
.scroll.value_y = 0,
},
};
fn void! Ctx.div_begin(&ctx, String label, Rect size, bool scroll_x = false, bool scroll_y = false)
{
Id id = label.hash();
Id id = ctx.gen_id(label)!;
Elem* parent = ctx.get_parent()!;
Elem* c_elem = ctx.get_elem(id)!;
@ -48,7 +39,7 @@ fn void! Ctx.div_begin(&ctx, String label, Rect size, bool scroll_x = false, boo
bool is_new = c_elem.flags.is_new;
if (c_elem.flags.is_new) {
*c_elem = DIV_DEFAULTS;
c_elem.type = ETYPE_DIV;
} else if (c_elem.type != ETYPE_DIV) {
return UgError.WRONG_ELEMENT_TYPE?;
}
@ -60,6 +51,10 @@ fn void! Ctx.div_begin(&ctx, String label, Rect size, bool scroll_x = false, boo
c_elem.div.children_bounds = c_elem.bounds;
c_elem.div.bgcolor = ctx.style.bgcolor;
// update the ctx scissor
ctx.div_scissor = c_elem.bounds;
ctx.push_scissor(c_elem.bounds)!;
// 4. Fill the div fields
c_elem.div.origin_c = Point{
.x = c_elem.bounds.x,
@ -77,8 +72,23 @@ fn void! Ctx.div_begin(&ctx, String label, Rect size, bool scroll_x = false, boo
// TODO: check active
// TODO: check resizeable
// FIXME: we cannot use slider elements as scrollbars because of id management
// scrollbars
if (parent.flags.has_focus) {
if (point_in_rect(ctx.input.mouse.pos, c_elem.bounds)) {
c_elem.flags.has_focus = true;
}
}
}
fn void! Ctx.div_end(&ctx)
{
// swap the children bounds
Elem* parent = ctx.get_parent()!;
Elem* c_elem = ctx.get_elem_by_tree_idx(ctx.active_div)!;
c_elem.div.pcb = c_elem.div.children_bounds;
c_elem.events = ctx.get_elem_events(c_elem);
Rect cb = c_elem.div.pcb;
// children bounds bottom-right corner
Point cbc = {
@ -105,25 +115,10 @@ fn void! Ctx.div_begin(&ctx, String label, Rect size, bool scroll_x = false, boo
.w = 10,
.h = c_elem.bounds.h,
};
short hh = (short)(max((float)bc.y / cbc.y, (float)0.15) * c_elem.bounds.h);
Rect vhandle = {
.x = c_elem.bounds.x + c_elem.bounds.w - 10,
.y = calc_slider(c_elem.bounds.y, c_elem.bounds.h-hh, c_elem.div.scroll.value_y),
.w = 10,
.h = hh,
};
Point m = ctx.input.mouse.pos;
if (parent.flags.has_focus && c_elem.events.mouse_hover &&
c_elem.events.mouse_hold && point_in_rect(m, vhandle)) {
vhandle.y = calc_slider(c_elem.bounds.y, c_elem.bounds.h-hh, c_elem.div.scroll.value_y);
c_elem.div.scroll.value_y = calc_value(c_elem.bounds.y, m.y, c_elem.bounds.h, hh);
c_elem.flags.updated = true;
}
ctx.push_rect(vslider, uint_to_rgba(0x999999ff))!;
ctx.push_rect(vhandle, uint_to_rgba(0x9999ffff))!;
DivLayout 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))!;
c_elem.div.layout = prev_l;
}
if (c_elem.div.scroll.on_x) {
@ -133,41 +128,12 @@ fn void! Ctx.div_begin(&ctx, String label, Rect size, bool scroll_x = false, boo
.w = c_elem.bounds.w,
.h = 10,
};
short hw = (short)(max((float)bc.x / cbc.x, (float)0.15) * c_elem.bounds.w);
Rect hhandle = {
.x = calc_slider(c_elem.bounds.x, c_elem.bounds.w-hw, c_elem.div.scroll.value_x),
.y = c_elem.bounds.y + c_elem.bounds.h - 10,
.w = hw,
.h = 10,
};
Point m = ctx.input.mouse.pos;
if (parent.flags.has_focus && c_elem.events.mouse_hover &&
c_elem.events.mouse_hold && point_in_rect(m, hhandle)) {
hhandle.x = calc_slider(c_elem.bounds.x, c_elem.bounds.w-hw, c_elem.div.scroll.value_x);
c_elem.div.scroll.value_x = calc_value(c_elem.bounds.x, m.x, c_elem.bounds.w, hw);
c_elem.flags.updated = true;
}
ctx.push_rect(hslider, uint_to_rgba(0x999999ff))!;
ctx.push_rect(hhandle, uint_to_rgba(0x9999ffff))!;
DivLayout 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))!;
c_elem.div.layout = prev_l;
}
if (parent.flags.has_focus) {
if (point_in_rect(ctx.input.mouse.pos, c_elem.bounds)) {
c_elem.flags.has_focus = true;
}
}
}
fn void! Ctx.div_end(&ctx)
{
// swap the children bounds
Elem* c_elem = ctx.get_elem_by_tree_idx(ctx.active_div)!;
c_elem.div.pcb = c_elem.div.children_bounds;
// the active_div returns to the parent of the current one
ctx.active_div = ctx.tree.parentof(ctx.active_div)!;
}

8
src/ugui_layout.c3
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@ -94,9 +94,11 @@ fn Rect Ctx.position_element(&ctx, Elem *parent, Rect rect, bool style = false)
origin = div.origin_r;
case LAYOUT_COLUMN:
origin = div.origin_c;
case LAYOUT_FLOATING: // none
default:
// Error
case LAYOUT_FLOATING: // none, relative to zero zero
case LAYOUT_ABSOLUTE: // absolute position, this is a no-op, return the rect
return rect;
default: // error
return Rect{};
}
// the bottom-right border of the element box

48
src/ugui_slider.c3
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@ -8,10 +8,6 @@ struct ElemSlider {
Rect handle;
}
const Elem SLIDER_DEFAULT = {
.type = ETYPE_SLIDER,
};
/* handle
* +----+-----+---------------------+
* | |#####| |
@ -20,9 +16,15 @@ const Elem SLIDER_DEFAULT = {
<*
@require value != null
*>
fn ElemEvents! Ctx.slider_hor(&ctx, String label, Rect size, float* value)
fn ElemEvents! Ctx.slider_hor(&ctx,
String label,
Rect size,
float* value,
float hpercent = 0.25,
Color bgcolor = uint_to_rgba(0x0000ffff),
Color handlecolor = uint_to_rgba(0x0ff000ff))
{
Id id = label.hash();
Id id = ctx.gen_id(label)!;
Elem *parent = ctx.get_parent()!;
Elem *c_elem = ctx.get_elem(id)!;
@ -31,8 +33,8 @@ fn ElemEvents! Ctx.slider_hor(&ctx, String label, Rect size, float* value)
// 1. Fill the element fields
if (c_elem.flags.is_new) {
*c_elem = SLIDER_DEFAULT;
} else if (c_elem.type != SLIDER_DEFAULT.type) {
c_elem.type = ETYPE_SLIDER;
} else if (c_elem.type != ETYPE_SLIDER) {
return UgError.WRONG_ELEMENT_TYPE?;
}
@ -40,7 +42,7 @@ fn ElemEvents! Ctx.slider_hor(&ctx, String label, Rect size, float* value)
c_elem.bounds = ctx.position_element(parent, size, true);
// handle width
short hw = (short)(c_elem.bounds.w * 0.25);
short hw = (short)(c_elem.bounds.w * hpercent);
Rect handle = {
.x = calc_slider(c_elem.bounds.x, c_elem.bounds.w-hw, *value),
.y = c_elem.bounds.y,
@ -60,10 +62,8 @@ fn ElemEvents! Ctx.slider_hor(&ctx, String label, Rect size, float* value)
}
// Draw the slider background and handle
Color bg_color = uint_to_rgba(0x0000ffff);
Color handle_color = uint_to_rgba(0x0ff000ff);
ctx.push_rect(c_elem.bounds, bg_color)!;
ctx.push_rect(c_elem.slider.handle, handle_color)!;
ctx.push_rect(c_elem.bounds, bgcolor)!;
ctx.push_rect(c_elem.slider.handle, handlecolor)!;
return c_elem.events;
}
@ -80,9 +80,15 @@ fn ElemEvents! Ctx.slider_hor(&ctx, String label, Rect size, float* value)
* | |
* +-+
*/
fn ElemEvents! Ctx.slider_ver(&ctx, String label, Rect size, float* value)
fn ElemEvents! Ctx.slider_ver(&ctx,
String label,
Rect size,
float* value,
float hpercent = 0.25,
Color bgcolor = uint_to_rgba(0x0000ffff),
Color handlecolor = uint_to_rgba(0x0ff000ff))
{
Id id = label.hash();
Id id = ctx.gen_id(label)!;
Elem *parent = ctx.get_parent()!;
Elem *c_elem = ctx.get_elem(id)!;
@ -91,8 +97,8 @@ fn ElemEvents! Ctx.slider_ver(&ctx, String label, Rect size, float* value)
// 1. Fill the element fields
if (c_elem.flags.is_new) {
*c_elem = SLIDER_DEFAULT;
} else if (c_elem.type != SLIDER_DEFAULT.type) {
c_elem.type = ETYPE_SLIDER;
} else if (c_elem.type != ETYPE_SLIDER) {
return UgError.WRONG_ELEMENT_TYPE?;
}
@ -100,7 +106,7 @@ fn ElemEvents! Ctx.slider_ver(&ctx, String label, Rect size, float* value)
c_elem.bounds = ctx.position_element(parent, size, true);
// handle height
short hh = (short)(c_elem.bounds.h * 0.25);
short hh = (short)(c_elem.bounds.h * hpercent);
Rect handle = {
.x = c_elem.bounds.x,
.y = calc_slider(c_elem.bounds.y, c_elem.bounds.h-hh, *value),
@ -121,10 +127,8 @@ fn ElemEvents! Ctx.slider_ver(&ctx, String label, Rect size, float* value)
}
// Draw the slider background and handle
Color bg_color = uint_to_rgba(0x0000ffff);
Color handle_color = uint_to_rgba(0x0ff000ff);
ctx.push_rect(c_elem.bounds, bg_color)!;
ctx.push_rect(c_elem.slider.handle, handle_color)!;
ctx.push_rect(c_elem.bounds, bgcolor)!;
ctx.push_rect(c_elem.slider.handle, handlecolor)!;
return c_elem.events;
}

2
src/ugui_text.c3
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@ -4,7 +4,7 @@ import std::io;
fn void! Ctx.text_unbounded(&ctx, String label, String text)
{
Id id = label.hash();
Id id = ctx.gen_id(label)!;
Elem *parent = ctx.get_parent()!;
Elem *c_elem = ctx.get_elem(id)!;

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