orca/sketches/ui/main.c

/*************************************************************************
*
*  Orca
*  Copyright 2023 Martin Fouilleul and the Orca project contributors
*  See LICENSE.txt for licensing information
*
**************************************************************************/
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define _USE_MATH_DEFINES //NOTE: necessary for MSVC
#include <math.h>

#include "orca.h"

/*
void debug_print_indent(int indent)
{
    for(int i = 0; i < indent; i++)
    {
        oc_log_info("  ");
    }
}

void debug_print_rule(oc_ui_style_rule* rule)
{
    oc_list_for(&rule->pattern.l, selector, oc_ui_selector, listElt)
    {
        switch(selector->kind)
        {
            case OC_UI_SEL_ANY:
                oc_log_info("any: ");
                break;

            case OC_UI_SEL_OWNER:
                oc_log_info("owner: ");
                break;

            case OC_UI_SEL_TEXT:
                oc_log_info("text='%.*s': ", (int)selector->text.len, selector->text.ptr);
                break;

            case OC_UI_SEL_TAG:
                oc_log_info("tag=0x%llx: ", selector->tag.hash);
                break;

            case OC_UI_SEL_STATUS:
            {
                if(selector->status & OC_UI_HOVER)
                {
                    oc_log_info("hover: ");
                }
                if(selector->status & OC_UI_ACTIVE)
                {
                    oc_log_info("active: ");
                }
                if(selector->status & OC_UI_DRAGGING)
                {
                    oc_log_info("dragging: ");
                }
            }
            break;

            case OC_UI_SEL_KEY:
                oc_log_info("key=0x%llx: ", selector->key.hash);
                break;

            default:
                oc_log_info("unknown: ");
                break;
        }
    }
    oc_log_info("=> font size = %f\n", rule->style->fontSize);
}

void debug_print_size(oc_ui_box* box, oc_ui_axis axis, int indent)
{
    debug_print_indent(indent);
    oc_log_info("size %s: ", axis == OC_UI_AXIS_X ? "x" : "y");
    f32 value = box->targetStyle->size.c[axis].value;
    switch(box->targetStyle->size.c[axis].kind)
    {
        case OC_UI_SIZE_TEXT:
            oc_log_info("text\n");
            break;

        case OC_UI_SIZE_CHILDREN:
            oc_log_info("children\n");
            break;

        case OC_UI_SIZE_PARENT:
            oc_log_info("parent: %f\n", value);
            break;

        case OC_UI_SIZE_PARENT_MINUS_PIXELS:
            oc_log_info("parent minus pixels: %f\n", value);
            break;

        case OC_UI_SIZE_PIXELS:
            oc_log_info("pixels: %f\n", value);
            break;
    }
}

void debug_print_styles(oc_ui_box* box, int indent)
{
    debug_print_indent(indent);
    oc_log_info("### box '%.*s'\n", (int)box->string.len, box->string.ptr);
    indent++;

    debug_print_indent(indent);
    oc_log_info("font size: %f\n", box->targetStyle->fontSize);

    debug_print_size(box, OC_UI_AXIS_X, indent);
    debug_print_size(box, OC_UI_AXIS_Y, indent);

    if(!oc_list_empty(&box->beforeRules))
    {
        debug_print_indent(indent);
        oc_log_info("before rules:\n");
        oc_list_for(&box->beforeRules, rule, oc_ui_style_rule, boxElt)
        {
            debug_print_indent(indent + 1);
            debug_print_rule(rule);
        }
    }

    if(!oc_list_empty(&box->afterRules))
    {
        debug_print_indent(indent);
        oc_log_info("after rules:\n");
        oc_list_for(&box->afterRules, rule, oc_ui_style_rule, boxElt)
        {
            debug_print_indent(indent + 1);
            debug_print_rule(rule);
        }
    }

    if(!oc_list_empty(&box->children))
    {
        debug_print_indent(indent);
        oc_log_info("children:\n");
        indent++;
        oc_list_for(&box->children, child, oc_ui_box, listElt)
        {
            debug_print_styles(child, indent);
        }
    }
}
*/

oc_vec2 frameSize = { 1200, 838 };

oc_surface surface;
oc_canvas canvas;
oc_font fontRegular;
oc_font fontBold;
oc_ui_context ui;
oc_arena textArena = { 0 };
oc_arena logArena = { 0 };
oc_str8_list logLines;

typedef enum cmd
{
    CMD_NONE,
    CMD_SET_DARK_THEME,
    CMD_SET_LIGHT_THEME
} cmd;

cmd command = CMD_NONE;

void log_push(const char* line)
{
    oc_str8_list_push(&logArena, &logLines, (oc_str8)OC_STR8(line));
}

void log_pushf(const char* format, ...)
{
    va_list args;
    va_start(args, format);
    oc_str8 str = oc_str8_pushfv(&logArena, format, args);
    va_end(args);
    oc_str8_list_push(&logArena, &logLines, str);
}

void column_begin(const char* header, f32 widthFraction)
{
    oc_ui_style_next(&(oc_ui_style){ .size.width = { OC_UI_SIZE_PARENT, widthFraction },
                                     .size.height = { OC_UI_SIZE_PARENT, 1 },
                                     .layout.axis = OC_UI_AXIS_Y,
                                     .layout.margin.y = 8,
                                     .layout.spacing = 24,
                                     .bgColor = ui.theme->bg1,
                                     .borderColor = ui.theme->border,
                                     .borderSize = 1,
                                     .roundness = ui.theme->roundnessSmall },
                     OC_UI_STYLE_SIZE
                         | OC_UI_STYLE_LAYOUT_AXIS
                         | OC_UI_STYLE_LAYOUT_MARGIN_Y
                         | OC_UI_STYLE_LAYOUT_SPACING
                         | OC_UI_STYLE_BG_COLOR
                         | OC_UI_STYLE_BORDER_COLOR
                         | OC_UI_STYLE_BORDER_SIZE
                         | OC_UI_STYLE_ROUNDNESS);
    oc_ui_box_begin(header, OC_UI_FLAG_DRAW_BACKGROUND | OC_UI_FLAG_DRAW_BORDER);

    oc_ui_style_next(&(oc_ui_style){ .size.width = { OC_UI_SIZE_PARENT, 1 },
                                     .layout.align.x = OC_UI_ALIGN_CENTER },
                     OC_UI_STYLE_SIZE_WIDTH
                         | OC_UI_STYLE_LAYOUT_ALIGN_X);
    oc_ui_container("header", OC_UI_FLAG_NONE)
    {
        oc_ui_style_next(&(oc_ui_style){ .fontSize = 18 },
                         OC_UI_STYLE_FONT_SIZE);
        oc_ui_label(header);
    }

    oc_ui_style_next(&(oc_ui_style){ .size.width = { OC_UI_SIZE_PARENT, 1 },
                                     .size.height = { OC_UI_SIZE_PARENT, 1, 1 },
                                     .layout.align.x = OC_UI_ALIGN_START,
                                     .layout.margin.x = 16,
                                     .layout.spacing = 24 },
                     OC_UI_STYLE_SIZE
                         | OC_UI_STYLE_LAYOUT_ALIGN_X
                         | OC_UI_STYLE_LAYOUT_MARGIN_X
                         | OC_UI_STYLE_LAYOUT_SPACING);
    oc_ui_box_begin("contents", OC_UI_FLAG_NONE | OC_UI_FLAG_DRAW_BORDER);
}

void column_end()
{
    oc_ui_box_end(); // contents
    oc_ui_box_end(); // column
}

#define column(h, w) oc_defer_loop(column_begin(h, w), column_end())

void labeled_slider(const char* label, f32* value)
{
    oc_ui_style_next(&(oc_ui_style){ .layout.axis = OC_UI_AXIS_X,
                                     .layout.spacing = 8 },
                     OC_UI_STYLE_LAYOUT_AXIS
                         | OC_UI_STYLE_LAYOUT_SPACING);
    oc_ui_container(label, OC_UI_FLAG_NONE)
    {
        oc_ui_style_match_after(oc_ui_pattern_owner(),
                                &(oc_ui_style){ .size.width = { OC_UI_SIZE_PIXELS, 100 } },
                                OC_UI_STYLE_SIZE_WIDTH);
        oc_ui_label(label);

        oc_ui_style_next(&(oc_ui_style){ .size.width = { OC_UI_SIZE_PIXELS, 100 } },
                         OC_UI_STYLE_SIZE_WIDTH);
        oc_ui_slider("slider", value);
    }
}

i32 ui_runloop(void* user)
{
    canvas = oc_canvas_create();
    oc_ui_init(&ui);

    while(!oc_should_quit())
    {
        oc_arena_scope scratch = oc_scratch_begin();

        oc_event* event = 0;
        while((event = oc_next_event(scratch.arena)) != 0)
        {
            oc_ui_process_event(event);

            switch(event->type)
            {
                case OC_EVENT_WINDOW_CLOSE:
                {
                    oc_request_quit();
                }
                break;

                case OC_EVENT_WINDOW_RESIZE:
                {
                    frameSize = (oc_vec2){ event->move.content.w, event->move.content.h };
                }
                break;

                default:
                    break;
            }
        }

        switch(command)
        {
            case CMD_SET_DARK_THEME:
                oc_ui_set_theme(&OC_UI_DARK_THEME);
                break;
            case CMD_SET_LIGHT_THEME:
                oc_ui_set_theme(&OC_UI_LIGHT_THEME);
                break;
            default:
                break;
        }
        command = CMD_NONE;

        oc_ui_style defaultStyle = { .font = fontRegular };
        oc_ui_style_mask defaultMask = OC_UI_STYLE_FONT;
        oc_ui_frame(frameSize, &defaultStyle, defaultMask)
        {
            oc_ui_style_next(&(oc_ui_style){ .size.width = { OC_UI_SIZE_PARENT, 1, .minSize = 1200 },
                                             .size.height = { OC_UI_SIZE_PARENT, 1, .minSize = 838 } },
                             OC_UI_STYLE_SIZE);

            oc_ui_container("top level", OC_UI_FLAG_NONE)
            {
                //--------------------------------------------------------------------------------------------
                // Menu bar
                //--------------------------------------------------------------------------------------------
                oc_ui_menu_bar("menu_bar")
                {
                    oc_ui_menu("File")
                    {
                        if(oc_ui_menu_button("Quit").pressed)
                        {
                            oc_request_quit();
                        }
                    }

                    oc_ui_menu("Theme")
                    {
                        if(oc_ui_menu_button("Dark theme").pressed)
                        {
                            command = CMD_SET_DARK_THEME;
                        }
                        if(oc_ui_menu_button("Light theme").pressed)
                        {
                            command = CMD_SET_LIGHT_THEME;
                        }
                    }
                }

                oc_ui_style_next(&(oc_ui_style){ .size.width = { OC_UI_SIZE_PARENT, 1 },
                                                 .size.height = { OC_UI_SIZE_PARENT, 1, 1 },
                                                 .layout.axis = OC_UI_AXIS_X,
                                                 .layout.margin.x = 16,
                                                 .layout.margin.y = 16,
                                                 .layout.spacing = 16 },
                                 OC_UI_STYLE_SIZE
                                     | OC_UI_STYLE_LAYOUT_AXIS
                                     | OC_UI_STYLE_LAYOUT_MARGINS
                                     | OC_UI_STYLE_LAYOUT_SPACING);

                oc_ui_container("background", OC_UI_FLAG_DRAW_BACKGROUND)
                {
                    column("Widgets", 1.0 / 3)
                    {

                        oc_ui_style_next(&(oc_ui_style){ .size.width = { OC_UI_SIZE_PARENT, 1 },
                                                         .layout.axis = OC_UI_AXIS_X,
                                                         .layout.spacing = 32 },
                                         OC_UI_STYLE_SIZE_WIDTH
                                             | OC_UI_STYLE_LAYOUT_AXIS
                                             | OC_UI_STYLE_LAYOUT_SPACING);
                        oc_ui_container("top", OC_UI_FLAG_NONE)
                        {
                            oc_ui_style_next(&(oc_ui_style){ .layout.axis = OC_UI_AXIS_Y,
                                                             .layout.spacing = 24 },
                                             OC_UI_STYLE_LAYOUT_AXIS
                                                 | OC_UI_STYLE_LAYOUT_SPACING);
                            oc_ui_container("top_left", OC_UI_FLAG_NONE)
                            {
                                //-----------------------------------------------------------------------------
                                // Label
                                //-----------------------------------------------------------------------------
                                oc_ui_label("Label");

                                //-----------------------------------------------------------------------------
                                // Button
                                //-----------------------------------------------------------------------------
                                if(oc_ui_button("Button").clicked)
                                {
                                    log_push("Button clicked");
                                }

                                oc_ui_style_next(&(oc_ui_style){ .layout.axis = OC_UI_AXIS_X,
                                                                 .layout.align.y = OC_UI_ALIGN_CENTER,
                                                                 .layout.spacing = 8 },
                                                 OC_UI_STYLE_LAYOUT_AXIS
                                                     | OC_UI_STYLE_LAYOUT_ALIGN_Y
                                                     | OC_UI_STYLE_LAYOUT_SPACING);
                                oc_ui_container("checkbox", OC_UI_FLAG_NONE)
                                {
                                    //-------------------------------------------------------------------------
                                    // Checkbox
                                    //-------------------------------------------------------------------------
                                    static bool checked = false;
                                    if(oc_ui_checkbox("checkbox", &checked).clicked)
                                    {
                                        if(checked)
                                        {
                                            log_push("Checkbox checked");
                                        }
                                        else
                                        {
                                            log_push("Checkbox unchecked");
                                        }
                                    }

                                    oc_ui_label("Checkbox");
                                }
                            }

                            //---------------------------------------------------------------------------------
                            // Vertical slider
                            //---------------------------------------------------------------------------------
                            static float vSliderValue = 0;
                            static float vSliderLoggedValue = 0;
                            static f64 vSliderLogTime = 0;
                            oc_ui_style_next(&(oc_ui_style){ .size.height = { OC_UI_SIZE_PIXELS, 130 } },
                                             OC_UI_STYLE_SIZE_HEIGHT);
                            oc_ui_slider("v_slider", &vSliderValue);
                            f64 now = oc_clock_time(OC_CLOCK_MONOTONIC);
                            if((now - vSliderLogTime) >= 0.2 && vSliderValue != vSliderLoggedValue)
                            {
                                log_pushf("Vertical slider moved to %f", vSliderValue);
                                vSliderLoggedValue = vSliderValue;
                                vSliderLogTime = now;
                            }

                            oc_ui_style_next(&(oc_ui_style){ .layout.axis = OC_UI_AXIS_Y,
                                                             .layout.spacing = 24 },
                                             OC_UI_STYLE_LAYOUT_AXIS
                                                 | OC_UI_STYLE_LAYOUT_SPACING);
                            oc_ui_container("top_right", OC_UI_FLAG_NONE)
                            {
                                //-----------------------------------------------------------------------------
                                // Tooltip
                                //-----------------------------------------------------------------------------
                                if(oc_ui_label("Tooltip").hovering)
                                {
                                    oc_ui_tooltip("Hi");
                                }

                                //-----------------------------------------------------------------------------
                                // Radio group
                                //-----------------------------------------------------------------------------
                                static int radioSelected = 0;
                                oc_str8 options[] = { OC_STR8("Radio 1"),
                                                      OC_STR8("Radio 2") };
                                oc_ui_radio_group_info radioGroupInfo = { .selectedIndex = radioSelected,
                                                                          .optionCount = 2,
                                                                          .options = options };
                                oc_ui_radio_group_info result = oc_ui_radio_group("radio_group", &radioGroupInfo);
                                radioSelected = result.selectedIndex;
                                if(result.changed)
                                {
                                    log_pushf("Selected Radio %i", result.selectedIndex + 1);
                                }

                                //-----------------------------------------------------------------------------
                                // Horizontal slider
                                //-----------------------------------------------------------------------------
                                static float hSliderValue = 0;
                                static float hSliderLoggedValue = 0;
                                static f64 hSliderLogTime = 0;
                                oc_ui_style_next(&(oc_ui_style){ .size.width = { OC_UI_SIZE_PIXELS, 130 } },
                                                 OC_UI_STYLE_SIZE_WIDTH);
                                oc_ui_slider("h_slider", &hSliderValue);
                                f64 now = oc_clock_time(OC_CLOCK_MONOTONIC);
                                if((now - hSliderLogTime) >= 0.2 && hSliderValue != hSliderLoggedValue)
                                {
                                    log_pushf("Slider moved to %f", hSliderValue);
                                    hSliderLoggedValue = hSliderValue;
                                    hSliderLogTime = now;
                                }
                            }
                        }

                        //-------------------------------------------------------------------------------------
                        // Text box
                        //-------------------------------------------------------------------------------------
                        oc_ui_style_next(&(oc_ui_style){ .size.width = { OC_UI_SIZE_PIXELS, 305 },
                                                         .size.height = { OC_UI_SIZE_TEXT } },
                                         OC_UI_STYLE_SIZE);
                        static oc_str8 text = OC_STR8_LIT("Text box");
                        oc_ui_text_box_result res = oc_ui_text_box("text", scratch.arena, text);
                        if(res.changed)
                        {
                            oc_arena_clear(&textArena);
                            text = oc_str8_push_copy(&textArena, res.text);
                        }
                        if(res.accepted)
                        {
                            log_pushf("Entered text \"%s\"", text.ptr);
                        }

                        //-------------------------------------------------------------------------------------
                        // Select
                        //-------------------------------------------------------------------------------------
                        static int selected = -1;
                        oc_str8 options[] = { OC_STR8("Option 1"),
                                              OC_STR8("Option 2") };
                        oc_ui_select_popup_info info = { .selectedIndex = selected,
                                                         .optionCount = 2,
                                                         .options = options,
                                                         .placeholder = OC_STR8_LIT("Select") };
                        oc_ui_select_popup_info result = oc_ui_select_popup("select", &info);
                        if(result.selectedIndex != selected)
                        {
                            log_pushf("Selected %s", options[result.selectedIndex].ptr);
                        }
                        selected = result.selectedIndex;

                        //-------------------------------------------------------------------------------------
                        // Scrollable panel
                        //-------------------------------------------------------------------------------------
                        oc_ui_style_next(&(oc_ui_style){ .size.width = { OC_UI_SIZE_PARENT, 1 },
                                                         .size.height = { OC_UI_SIZE_PARENT, 1, 1 },
                                                         .layout.margin.x = 16,
                                                         .layout.margin.y = 16,
                                                         .layout.spacing = 8,
                                                         .bgColor = ui.theme->bg2,
                                                         .borderColor = ui.theme->border,
                                                         .borderSize = 1,
                                                         .roundness = ui.theme->roundnessSmall },
                                         OC_UI_STYLE_SIZE
                                             | OC_UI_STYLE_LAYOUT_MARGINS
                                             | OC_UI_STYLE_LAYOUT_SPACING
                                             | OC_UI_STYLE_BG_COLOR
                                             | OC_UI_STYLE_BORDER_COLOR
                                             | OC_UI_STYLE_BORDER_SIZE
                                             | OC_UI_STYLE_ROUNDNESS);
                        oc_ui_panel("log", OC_UI_FLAG_DRAW_BACKGROUND | OC_UI_FLAG_DRAW_BORDER)
                        {
                            if(oc_list_empty(logLines.list))
                            {
                                oc_ui_style_next(&(oc_ui_style){ .color = ui.theme->text2 },
                                                 OC_UI_STYLE_COLOR);
                                oc_ui_label("Log");
                            }

                            i32 i = 0;
                            oc_list_for(logLines.list, logLine, oc_str8_elt, listElt)
                            {
                                char id[15];
                                snprintf(id, sizeof(id), "%d", i);
                                oc_ui_container(id, OC_UI_FLAG_NONE)
                                {
                                    oc_ui_label_str8(logLine->string);
                                }
                                i++;
                            }
                        }
                    }

                    //-----------------------------------------------------------------------------------------
                    // Styling
                    //-----------------------------------------------------------------------------------------
                    // Initial values here are hardcoded from the dark theme and everything is overridden all
                    // the time. In a real program you'd only override what you need and supply the values from
                    // ui.theme or ui.theme->palette.
                    //
                    // Rule-based styling is described at
                    // https://www.forkingpaths.dev/posts/23-03-10/rule_based_styling_imgui.html
                    column("Styling", 2.0 / 3)
                    {
                        static f32 unselectedWidth = 16;
                        static f32 unselectedHeight = 16;
                        static f32 unselectedRoundness = 8;
                        static f32 unselectedBgR = 0.086;
                        static f32 unselectedBgG = 0.086;
                        static f32 unselectedBgB = 0.102;
                        static f32 unselectedBgA = 1;
                        static f32 unselectedBorderR = 0.976;
                        static f32 unselectedBorderG = 0.976;
                        static f32 unselectedBorderB = 0.976;
                        static f32 unselectedBorderA = 0.35;
                        static f32 unselectedBorderSize = 1;
                        static oc_ui_status unselectedWhenStatus = OC_UI_NONE;

                        static f32 selectedWidth = 16;
                        static f32 selectedHeight = 16;
                        static f32 selectedRoundness = 8;
                        static f32 selectedR = 1;
                        static f32 selectedG = 1;
                        static f32 selectedB = 1;
                        static f32 selectedA = 1;
                        static f32 selectedBgR = 0.33;
                        static f32 selectedBgG = 0.66;
                        static f32 selectedBgB = 1;
                        static f32 selectedBgA = 1;
                        static oc_ui_status selectedWhenStatus = OC_UI_NONE;

                        static oc_color labelFontColor = { 0.976, 0.976, 0.976, 1 };
                        static oc_font* labelFont = &fontRegular;
                        static f32 labelFontSize = 14;

                        oc_ui_style_next(&(oc_ui_style){ .size.width = { OC_UI_SIZE_PARENT, 1 },
                                                         .size.height = { OC_UI_SIZE_PIXELS, 152 },
                                                         .layout.margin.x = 320,
                                                         .layout.margin.y = 16,
                                                         .bgColor = OC_UI_DARK_THEME.bg0,
                                                         .roundness = OC_UI_DARK_THEME.roundnessSmall },
                                         OC_UI_STYLE_SIZE
                                             | OC_UI_STYLE_LAYOUT_MARGINS
                                             | OC_UI_STYLE_BG_COLOR
                                             | OC_UI_STYLE_ROUNDNESS);
                        oc_ui_container("styled_radios", OC_UI_FLAG_DRAW_BACKGROUND | OC_UI_FLAG_DRAW_BORDER)
                        {
                            oc_ui_pattern unselectedPattern = { 0 };
                            oc_ui_pattern_push(scratch.arena,
                                               &unselectedPattern,
                                               (oc_ui_selector){ .kind = OC_UI_SEL_TAG,
                                                                 .tag = oc_ui_tag_make("radio") });
                            oc_ui_pattern_push(scratch.arena,
                                               &unselectedPattern,
                                               (oc_ui_selector){ .op = OC_UI_SEL_AND,
                                                                 .kind = OC_UI_SEL_STATUS,
                                                                 .status = unselectedWhenStatus });
                            oc_ui_style_match_after(unselectedPattern,
                                                    &(oc_ui_style){ .size.width = { OC_UI_SIZE_PIXELS, unselectedWidth },
                                                                    .size.height = { OC_UI_SIZE_PIXELS, unselectedHeight },
                                                                    .bgColor = { unselectedBgR, unselectedBgG, unselectedBgB, unselectedBgA },
                                                                    .borderColor = { unselectedBorderR, unselectedBorderG, unselectedBorderB, unselectedBorderA },
                                                                    .borderSize = unselectedBorderSize,
                                                                    .roundness = unselectedRoundness },
                                                    OC_UI_STYLE_SIZE
                                                        | OC_UI_STYLE_BG_COLOR
                                                        | OC_UI_STYLE_BORDER_COLOR
                                                        | OC_UI_STYLE_BORDER_SIZE
                                                        | OC_UI_STYLE_ROUNDNESS);

                            oc_ui_pattern selectedPattern = { 0 };
                            oc_ui_pattern_push(scratch.arena,
                                               &selectedPattern,
                                               (oc_ui_selector){ .kind = OC_UI_SEL_TAG,
                                                                 .tag = oc_ui_tag_make("radio_selected") });
                            oc_ui_pattern_push(scratch.arena,
                                               &selectedPattern,
                                               (oc_ui_selector){ .op = OC_UI_SEL_AND,
                                                                 .kind = OC_UI_SEL_STATUS,
                                                                 .status = selectedWhenStatus });
                            oc_ui_style_match_after(selectedPattern,
                                                    &(oc_ui_style){ .size.width = { OC_UI_SIZE_PIXELS, selectedWidth },
                                                                    .size.height = { OC_UI_SIZE_PIXELS, selectedHeight },
                                                                    .color = { selectedR, selectedG, selectedB, selectedA },
                                                                    .bgColor = { selectedBgR, selectedBgG, selectedBgB, selectedBgA },
                                                                    .roundness = selectedRoundness },
                                                    OC_UI_STYLE_SIZE
                                                        | OC_UI_STYLE_COLOR
                                                        | OC_UI_STYLE_BG_COLOR
                                                        | OC_UI_STYLE_ROUNDNESS);

                            oc_ui_pattern labelPattern = { 0 };
                            oc_ui_tag labelTag = oc_ui_tag_make("label");
                            oc_ui_pattern_push(scratch.arena, &labelPattern, (oc_ui_selector){ .kind = OC_UI_SEL_TAG, .tag = labelTag });
                            oc_ui_style_match_after(labelPattern,
                                                    &(oc_ui_style){ .color = labelFontColor,
                                                                    .font = *labelFont,
                                                                    .fontSize = labelFontSize },
                                                    OC_UI_STYLE_COLOR
                                                        | OC_UI_STYLE_FONT
                                                        | OC_UI_STYLE_FONT_SIZE);

                            static int selectedIndex = 0;
                            oc_str8 options[] = { OC_STR8("I"),
                                                  OC_STR8("Am"),
                                                  OC_STR8("Stylish") };
                            oc_ui_radio_group_info radioGroupInfo = { .selectedIndex = selectedIndex,
                                                                      .optionCount = oc_array_size(options),
                                                                      .options = options };
                            oc_ui_radio_group_info result = oc_ui_radio_group("radio_group", &radioGroupInfo);
                            selectedIndex = result.selectedIndex;
                        }

                        oc_ui_style_next(&(oc_ui_style){ .layout.axis = OC_UI_AXIS_X,
                                                         .layout.spacing = 32 },
                                         OC_UI_STYLE_LAYOUT_AXIS
                                             | OC_UI_STYLE_LAYOUT_SPACING);
                        oc_ui_container("controls", OC_UI_FLAG_NONE)
                        {
                            oc_ui_style_next(&(oc_ui_style){ .layout.axis = OC_UI_AXIS_Y,
                                                             .layout.spacing = 16 },
                                             OC_UI_STYLE_LAYOUT_AXIS
                                                 | OC_UI_STYLE_LAYOUT_SPACING);
                            oc_ui_container("unselected", OC_UI_FLAG_NONE)
                            {
                                oc_ui_style_next(&(oc_ui_style){ .fontSize = 16 },
                                                 OC_UI_STYLE_FONT_SIZE);
                                oc_ui_label("Radio style");

                                oc_ui_style_next(&(oc_ui_style){ .layout.spacing = 4 },
                                                 OC_UI_STYLE_LAYOUT_SPACING);
                                oc_ui_container("size", OC_UI_FLAG_NONE)
                                {
                                    f32 widthSlider = (unselectedWidth - 8) / 16;
                                    labeled_slider("Width", &widthSlider);
                                    unselectedWidth = 8 + widthSlider * 16;

                                    f32 heightSlider = (unselectedHeight - 8) / 16;
                                    labeled_slider("Height", &heightSlider);
                                    unselectedHeight = 8 + heightSlider * 16;

                                    f32 roundnessSlider = (unselectedRoundness - 4) / 8;
                                    labeled_slider("Roundness", &roundnessSlider);
                                    unselectedRoundness = 4 + roundnessSlider * 8;
                                }

                                oc_ui_style_next(&(oc_ui_style){ .layout.spacing = 4 },
                                                 OC_UI_STYLE_LAYOUT_SPACING);
                                oc_ui_container("background", OC_UI_FLAG_NONE)
                                {
                                    labeled_slider("Background R", &unselectedBgR);
                                    labeled_slider("Background G", &unselectedBgG);
                                    labeled_slider("Background B", &unselectedBgB);
                                    labeled_slider("Background A", &unselectedBgA);
                                }

                                oc_ui_style_next(&(oc_ui_style){ .layout.spacing = 4 },
                                                 OC_UI_STYLE_LAYOUT_SPACING);
                                oc_ui_container("border", OC_UI_FLAG_NONE)
                                {
                                    labeled_slider("Border R", &unselectedBorderR);
                                    labeled_slider("Border G", &unselectedBorderG);
                                    labeled_slider("Border B", &unselectedBorderB);
                                    labeled_slider("Border A", &unselectedBorderA);
                                }

                                f32 borderSizeSlider = unselectedBorderSize / 5;
                                labeled_slider("Border size", &borderSizeSlider);
                                unselectedBorderSize = borderSizeSlider * 5;

                                oc_ui_style_next(&(oc_ui_style){ .layout.spacing = 10 },
                                                 OC_UI_STYLE_LAYOUT_SPACING);
                                oc_ui_container("status_override", OC_UI_FLAG_NONE)
                                {
                                    oc_ui_label("Override");

                                    static int statusIndex = 0;
                                    oc_str8 statusOptions[] = { OC_STR8("Always"),
                                                                OC_STR8("When hovering"),
                                                                OC_STR8("When dragging") };
                                    oc_ui_radio_group_info statusInfo = { .selectedIndex = statusIndex,
                                                                          .optionCount = oc_array_size(statusOptions),
                                                                          .options = statusOptions };
                                    oc_ui_radio_group_info result = oc_ui_radio_group("status", &statusInfo);
                                    statusIndex = result.selectedIndex;
                                    switch(statusIndex)
                                    {
                                        case 0:
                                            unselectedWhenStatus = OC_UI_NONE;
                                            break;
                                        case 1:
                                            unselectedWhenStatus = OC_UI_HOVER;
                                            break;
                                        case 2:
                                            unselectedWhenStatus = OC_UI_DRAGGING;
                                            break;
                                        default:
                                            break;
                                    }
                                }
                            }

                            oc_ui_style_next(&(oc_ui_style){ .layout.axis = OC_UI_AXIS_Y,
                                                             .layout.spacing = 16 },
                                             OC_UI_STYLE_LAYOUT_AXIS
                                                 | OC_UI_STYLE_LAYOUT_SPACING);
                            oc_ui_container("selected", OC_UI_FLAG_NONE)
                            {
                                oc_ui_style_next(&(oc_ui_style){ .fontSize = 16 },
                                                 OC_UI_STYLE_FONT_SIZE);
                                oc_ui_label("Radio selected style");

                                oc_ui_style_next(&(oc_ui_style){ .layout.spacing = 4 },
                                                 OC_UI_STYLE_LAYOUT_SPACING);
                                oc_ui_container("size", OC_UI_FLAG_NONE)
                                {
                                    f32 widthSlider = (selectedWidth - 8) / 16;
                                    labeled_slider("Width", &widthSlider);
                                    selectedWidth = 8 + widthSlider * 16;

                                    f32 heightSlider = (selectedHeight - 8) / 16;
                                    labeled_slider("Height", &heightSlider);
                                    selectedHeight = 8 + heightSlider * 16;

                                    f32 roundnessSlider = (selectedRoundness - 4) / 8;
                                    labeled_slider("Roundness", &roundnessSlider);
                                    selectedRoundness = 4 + roundnessSlider * 8;
                                }

                                oc_ui_style_next(&(oc_ui_style){ .layout.spacing = 4 },
                                                 OC_UI_STYLE_LAYOUT_SPACING);
                                oc_ui_container("color", OC_UI_FLAG_NONE)
                                {
                                    labeled_slider("Center R", &selectedR);
                                    labeled_slider("Center G", &selectedG);
                                    labeled_slider("Center B", &selectedB);
                                    labeled_slider("Center A", &selectedA);
                                }

                                oc_ui_style_next(&(oc_ui_style){ .layout.spacing = 4 },
                                                 OC_UI_STYLE_LAYOUT_SPACING);
                                oc_ui_container("background", OC_UI_FLAG_NONE)
                                {
                                    labeled_slider("Background R", &selectedBgR);
                                    labeled_slider("Background G", &selectedBgG);
                                    labeled_slider("Background B", &selectedBgB);
                                    labeled_slider("Background A", &selectedBgA);
                                }

                                oc_ui_style_next(&(oc_ui_style){ .layout.spacing = 10 },
                                                 OC_UI_STYLE_LAYOUT_SPACING);
                                oc_ui_container("status_override", OC_UI_FLAG_NONE)
                                {
                                    oc_ui_style_next(&(oc_ui_style){ .size.height = { OC_UI_SIZE_PIXELS, 30 } },
                                                     OC_UI_STYLE_SIZE_HEIGHT);
                                    oc_ui_box_make("spacer", OC_UI_FLAG_NONE);

                                    oc_ui_label("Override");

                                    static int statusIndex = 0;
                                    oc_str8 statusOptions[] = { OC_STR8("Always"),
                                                                OC_STR8("When hovering"),
                                                                OC_STR8("When dragging") };
                                    oc_ui_radio_group_info statusInfo = { .selectedIndex = statusIndex,
                                                                          .optionCount = oc_array_size(statusOptions),
                                                                          .options = statusOptions };
                                    oc_ui_radio_group_info result = oc_ui_radio_group("status", &statusInfo);
                                    statusIndex = result.selectedIndex;
                                    switch(statusIndex)
                                    {
                                        case 0:
                                            selectedWhenStatus = OC_UI_NONE;
                                            break;
                                        case 1:
                                            selectedWhenStatus = OC_UI_HOVER;
                                            break;
                                        case 2:
                                            selectedWhenStatus = OC_UI_DRAGGING;
                                            break;
                                        default:
                                            break;
                                    }
                                }
                            }

                            oc_ui_style_next(&(oc_ui_style){ .layout.axis = OC_UI_AXIS_Y,
                                                             .layout.spacing = 16 },
                                             OC_UI_STYLE_LAYOUT_AXIS
                                                 | OC_UI_STYLE_LAYOUT_SPACING);
                            oc_ui_container("label", OC_UI_FLAG_NONE)
                            {
                                oc_ui_style_next(&(oc_ui_style){ .fontSize = 16 },
                                                 OC_UI_STYLE_FONT_SIZE);
                                oc_ui_label("Label style");

                                oc_ui_style_next(&(oc_ui_style){ .layout.axis = OC_UI_AXIS_X,
                                                                 .layout.spacing = 8 },
                                                 OC_UI_STYLE_LAYOUT_AXIS
                                                     | OC_UI_STYLE_LAYOUT_SPACING);
                                oc_ui_container("font_color", OC_UI_FLAG_NONE)
                                {
                                    oc_ui_style_match_after(oc_ui_pattern_owner(),
                                                            &(oc_ui_style){ .size.width = { OC_UI_SIZE_PIXELS, 100 } },
                                                            OC_UI_STYLE_SIZE_WIDTH);
                                    oc_ui_label("Font color");

                                    static int colorSelected = 0;
                                    oc_str8 colorNames[] = { OC_STR8("Default"),
                                                             OC_STR8("Red"),
                                                             OC_STR8("Orange"),
                                                             OC_STR8("Amber"),
                                                             OC_STR8("Yellow"),
                                                             OC_STR8("Lime"),
                                                             OC_STR8("Light Green"),
                                                             OC_STR8("Green") };
                                    oc_color colors[] = { OC_UI_DARK_THEME.text0,
                                                          OC_UI_DARK_THEME.palette->red5,
                                                          OC_UI_DARK_THEME.palette->orange5,
                                                          OC_UI_DARK_THEME.palette->amber5,
                                                          OC_UI_DARK_THEME.palette->yellow5,
                                                          OC_UI_DARK_THEME.palette->lime5,
                                                          OC_UI_DARK_THEME.palette->lightGreen5,
                                                          OC_UI_DARK_THEME.palette->green5 };
                                    oc_ui_select_popup_info colorInfo = { .selectedIndex = colorSelected,
                                                                          .optionCount = oc_array_size(colorNames),
                                                                          .options = colorNames };
                                    oc_ui_select_popup_info colorResult = oc_ui_select_popup("color", &colorInfo);
                                    colorSelected = colorResult.selectedIndex;
                                    labelFontColor = colors[colorSelected];
                                }

                                oc_ui_style_next(&(oc_ui_style){ .layout.axis = OC_UI_AXIS_X,
                                                                 .layout.spacing = 8 },
                                                 OC_UI_STYLE_LAYOUT_AXIS
                                                     | OC_UI_STYLE_LAYOUT_SPACING);
                                oc_ui_container("font", OC_UI_FLAG_NONE)
                                {
                                    oc_ui_style_match_after(oc_ui_pattern_owner(),
                                                            &(oc_ui_style){ .size.width = { OC_UI_SIZE_PIXELS, 100 } },
                                                            OC_UI_STYLE_SIZE_WIDTH);
                                    oc_ui_label("Font");

                                    static int fontSelected = 0;
                                    oc_str8 fontNames[] = { OC_STR8("Regular"),
                                                            OC_STR8("Bold") };
                                    oc_font* fonts[] = { &fontRegular,
                                                         &fontBold };
                                    oc_ui_select_popup_info fontInfo = { .selectedIndex = fontSelected,
                                                                         .optionCount = oc_array_size(fontNames),
                                                                         .options = fontNames };
                                    oc_ui_select_popup_info fontResult = oc_ui_select_popup("font_style", &fontInfo);
                                    fontSelected = fontResult.selectedIndex;
                                    labelFont = fonts[fontSelected];
                                }

                                f32 fontSizeSlider = (labelFontSize - 8) / 16;
                                labeled_slider("Font size", &fontSizeSlider);
                                labelFontSize = 8 + fontSizeSlider * 16;
                            }
                        }
                    }
                }
            }
        }

        oc_canvas_select(canvas);
        oc_surface_select(surface);
        oc_ui_draw();
        oc_render(canvas);
        oc_surface_present(surface);

        oc_scratch_end(scratch);
    }
    return (0);
}

int main()
{
    oc_init();
    oc_clock_init(); //TODO put that in oc_init()?

    oc_rect windowRect = { .x = 100, .y = 100, .w = frameSize.x, .h = frameSize.y };
    oc_window window = oc_window_create(windowRect, OC_STR8("test"), 0);

    oc_rect contentRect = oc_window_get_content_rect(window);

    oc_window_set_title(window, OC_STR8("Orca UI Demo"));

    surface = oc_surface_create_for_window(window, OC_CANVAS);
    oc_surface_deselect();

    oc_arena_scope scratch = oc_scratch_begin();

    oc_font* fonts[2] = { &fontRegular, &fontBold };
    oc_str8 fontNames[2] = {
        oc_path_executable_relative(scratch.arena, OC_STR8("../OpenSans-Regular.ttf")),
        oc_path_executable_relative(scratch.arena, OC_STR8("../OpenSans-Bold.ttf"))
    };

    for(int i = 0; i < 2; i++)
    {
        oc_file file = oc_file_open(fontNames[i], OC_FILE_ACCESS_READ, 0);
        if(oc_file_last_error(file) != OC_IO_OK)
        {
            oc_log_error("Couldn't open file %.*s\n", oc_str8_ip(fontNames[i]));
        }
        u64 size = oc_file_size(file);
        char* buffer = (char*)oc_arena_push(scratch.arena, size);
        oc_file_read(file, size, buffer);
        oc_file_close(file);
        oc_unicode_range ranges[5] = { OC_UNICODE_BASIC_LATIN,
                                       OC_UNICODE_C1_CONTROLS_AND_LATIN_1_SUPPLEMENT,
                                       OC_UNICODE_LATIN_EXTENDED_A,
                                       OC_UNICODE_LATIN_EXTENDED_B,
                                       OC_UNICODE_SPECIALS };

        *fonts[i] = oc_font_create_from_memory(oc_str8_from_buffer(size, buffer), 5, ranges);
    }
    oc_scratch_end(scratch);

    oc_arena_init(&textArena);
    oc_arena_init(&logArena);
    oc_list_init(&logLines.list);

    // start app
    oc_window_bring_to_front(window);
    oc_window_focus(window);

    oc_thread* runloopThread = oc_thread_create(ui_runloop, 0);

    while(!oc_should_quit())
    {
        oc_pump_events(-1);
        //TODO: what to do with mem scratch here?
    }

    oc_surface_destroy(surface);
    oc_terminate();

    return (0);
}