#include "pch.h"
#include "log.h"
#include "node_panel_stroke.h"
#include "canvas.h"
#include "node_button.h"
#include "app.h"
#include "abr.h"

Node* NodePanelStroke::clone_instantiate() const
{
    return new NodePanelStroke();
}

void NodePanelStroke::clone_finalize(Node* dest) const
{
    NodePanelStroke* n = static_cast<NodePanelStroke*>(dest);
    n->init_controls();
}

void NodePanelStroke::init()
{
    init_template("tpl-panel-stroke");
    init_controls();
}

bool NodePanelStroke::import_abr(const std::string& path)
{
    ABR abr;
    LOG("ABR detected");

    std::string name, base, ext;
    std::regex r(R"((.*)[\\/]([^\\/]+)\.(\w+)$)");
    std::smatch m;
    if (!std::regex_search(path, m, r))
        return false;
    base = m[1].str();
    name = m[2].str();
    ext = m[3].str();

    if (!str_iequals(ext, "abr"))
        return false;

    if (!abr.open(path))
    {
        LOG("ABR read failed");
        return false;
    }

    int tot = abr.m_samples.size() + abr.m_patterns.size() + abr.m_presets.size();
    std::atomic_int count(0);
    async_start();
    auto pb = App::I.show_progress("Importing ABR");
    app_redraw();
    async_update();
    async_end();

    parallel_for(abr.m_samples.size(), [&](size_t i)
    //for (const auto& samp : abr.m_samples)
    {
        auto ii = abr.m_samples.begin();
        std::advance(ii, i);
        const auto& samp = *ii;
        std::string path_high = App::I.data_path + "/brushes/" + samp.first + ".png";
        std::string path_thumb = App::I.data_path + "/brushes/thumbs/" + samp.first + ".png";
        auto padded = samp.second->resize_squared(glm::u8vec4(255));
        //auto high = padded.resize_power2();
        //high.save(path_high);
        samp.second->save(path_high);
        auto thumb = padded.resize(64, 64);
        thumb.save(path_thumb);

        async_start();
        NodeButtonBrush* brush = new NodeButtonBrush;
        m_brush_popup->m_container->add_child(brush);
        brush->init();
        brush->create();
        brush->loaded();
        brush->set_icon(path_thumb.c_str());
        brush->thumb_path = path_thumb;
        brush->high_path = path_high;
        brush->brush_name = name;
        brush->m_user_brush = true;
        brush->on_click = std::bind(&NodePanelBrush::handle_click, m_brush_popup, std::placeholders::_1);
        count++;
        float prog = (float)count / (float)tot;
        pb->m_progress->SetWidthP(prog * 100.f);
        app_redraw();
        async_update();
        async_end();
    });
    parallel_for(abr.m_patterns.size(), [&](size_t i)
    //for (const auto& patt : abr.m_patterns)
    {
        auto ii = abr.m_patterns.begin();
        std::advance(ii, i);
        const auto& patt = *ii;
        std::string path_high = App::I.data_path + "/patterns/" + patt.first + ".png";
        std::string path_thumb = App::I.data_path + "/patterns/thumbs/" + patt.first + ".png";
        patt.second->save(path_high);
        auto thumb = patt.second->resize(64, 64);
        thumb.save(path_thumb);
        
        async_start();
        NodeButtonBrush* brush = new NodeButtonBrush;
        m_pattern_popup->m_container->add_child(brush);
        brush->init();
        brush->create();
        brush->loaded();
        brush->set_icon(path_thumb.c_str());
        brush->thumb_path = path_thumb;
        brush->high_path = path_high;
        brush->brush_name = name;
        brush->m_user_brush = true;
        brush->on_click = std::bind(&NodePanelBrush::handle_click, m_pattern_popup, std::placeholders::_1);
        count++;
        float prog = (float)count / (float)tot;
        pb->m_progress->SetWidthP(prog * 100.f);
        app_redraw();
        async_update();
        async_end();
    });
    auto brushes = abr.compute_brushes(App::I.data_path);
    for (const auto& pr : brushes)
    {
        auto presets = App::I.stroke->m_presets_popup;
        async_start();
        if (pr->load())
        {
            LOG("add preset %s", pr->m_name.c_str());
            presets->add_brush(pr);
        }
        count++;
        float prog = (float)count / (float)tot;
        pb->m_progress->SetWidthP(prog * 100.f);
        app_redraw();
        async_update();
        async_end();
    }

    async_start();
    pb->destroy();
    app_redraw();
    async_update();
    async_end();
    //save();
}

void NodePanelStroke::update_controls()
{
    const auto& b = Canvas::I->m_current_brush;
    m_tip_size->m_value.x = m_curves[m_tip_size].to_slider(b->m_tip_size);
    m_tip_spacing->m_value.x = m_curves[m_tip_spacing].to_slider(b->m_tip_spacing);
    m_tip_flow->m_value.x = m_curves[m_tip_flow].to_slider(b->m_tip_flow);
    m_tip_opacity->m_value.x = b->m_tip_opacity;
    m_tip_angle->m_value.x = b->m_tip_angle;
    m_tip_angle_delay->m_value.x = b->m_tip_angle_delay;
    m_tip_wet->m_value.x = b->m_tip_wet;
    m_tip_noise->m_value.x = b->m_tip_noise;
    m_jitter_scale->m_value.x = b->m_jitter_scale;
    m_jitter_angle->m_value.x = b->m_jitter_angle;
    m_jitter_spread->m_value.x = b->m_jitter_spread;
    m_jitter_flow->m_value.x = b->m_jitter_flow;
    m_jitter_hue->m_value.x = b->m_jitter_hue;
    m_jitter_sat->m_value.x = b->m_jitter_sat;
    m_jitter_val->m_value.x = b->m_jitter_val;
    m_tip_angle_follow->checked = b->m_tip_angle_follow;
    m_tip_flow_pressure->checked = b->m_tip_flow_pressure;
    m_tip_size_pressure->checked = b->m_tip_size_pressure;

    m_tip_invert->checked = b->m_tip_invert;
    m_tip_flipx->checked = b->m_tip_flipx;
    m_tip_flipy->checked = b->m_tip_flipy;
    m_pattern_enabled->checked = b->m_pattern_enabled;
    m_dual_enabled->checked = b->m_dual_enabled;
    m_dual_scatter_axis->checked = b->m_dual_scatter_axis;
    m_dual_invert->checked = b->m_dual_invert;
    m_dual_flipx->checked = b->m_dual_flipx;
    m_dual_flipy->checked = b->m_dual_flipy;
    m_dual_randflip->checked = b->m_dual_randflip;
    m_tip_randflipx->checked = b->m_tip_randflipx;
    m_tip_randflipy->checked = b->m_tip_randflipy;
   
    m_dual_size->m_value.x = m_curves[m_dual_size].to_slider(b->m_dual_size);
    m_dual_spacing->m_value.x = m_curves[m_dual_spacing].to_slider(b->m_dual_spacing);
    m_dual_flow->m_value.x = m_curves[m_dual_flow].to_slider(b->m_dual_flow);
    m_dual_scatter->m_value.x = b->m_dual_scatter;
    m_tip_aspect->m_value.x = b->m_tip_aspect;
    m_dual_opacity->m_value.x = b->m_dual_opacity;
    m_dual_rotate->m_value.x = b->m_dual_rotate;

    m_pattern_eachsample->checked = b->m_pattern_eachsample;
    m_pattern_invert->checked = b->m_pattern_invert;
    m_pattern_flipx->checked = b->m_pattern_flipx;
    m_pattern_flipy->checked = b->m_pattern_flipy;
    m_pattern_rand_offset->checked = b->m_pattern_rand_offset;
    m_pattern_scale->m_value.x = m_curves[m_pattern_scale].to_slider(b->m_pattern_scale);
    m_pattern_brightness->m_value.x = b->m_pattern_brightness;
    m_pattern_contrast->m_value.x = b->m_pattern_contrast;
    m_pattern_depth->m_value.x = b->m_pattern_depth;

    m_blend_mode->set_index(b->m_blend_mode);
    m_dual_blend_mode->set_index(b->m_dual_blend_mode);
    m_pattern_blend_mode->set_index(b->m_pattern_blend_mode);

    m_preview->m_brush = b;
    m_preview->draw_stroke();
}

void NodePanelStroke::init_fold(const std::string& name)
{
    if (auto b = find<NodeButton>(("button-unfold-" + name).c_str())) {
        b->on_click = [this,name](Node*) {
            find(("fold-" + name).c_str())->ToggleVisibility();
        };
    }
}

void NodePanelStroke::init_controls()
{
    m_brush_popup = std::make_shared<NodePanelBrush>();
    m_brush_popup->m_manager = m_manager;
    m_brush_popup->m_dir_name = "brushes";
    m_brush_popup->init();
    m_brush_popup->create();
    m_brush_popup->loaded();
    m_brush_popup->SetPositioning(YGPositionTypeAbsolute);
    m_brush_popup->SetSize(300, 400);
    m_brush_popup->m_mouse_ignore = false;
    m_brush_popup->m_flood_events = true;
    m_brush_popup->m_capture_children = false;

    m_pattern_popup = std::make_shared<NodePanelBrush>();
    m_pattern_popup->m_manager = m_manager;
    m_pattern_popup->m_dir_name = "textures";
    m_pattern_popup->init();
    m_pattern_popup->create();
    m_pattern_popup->loaded();
    m_pattern_popup->SetPositioning(YGPositionTypeAbsolute);
    m_pattern_popup->SetSize(300, 400);
    m_pattern_popup->m_mouse_ignore = false;
    m_pattern_popup->m_flood_events = true;
    m_pattern_popup->m_capture_children = false;

    m_presets_popup = std::make_shared<NodePanelBrushPreset>();
    m_presets_popup->m_manager = m_manager;
    m_presets_popup->init();
    m_presets_popup->create();
    m_presets_popup->loaded();
    m_presets_popup->SetPositioning(YGPositionTypeAbsolute);
    m_presets_popup->SetSize(300, 400);
    m_presets_popup->m_mouse_ignore = false;
    m_presets_popup->m_flood_events = true;
    m_presets_popup->m_capture_children = false;

    int br_idx = std::max(m_brush_popup->find_brush("Round-Hard"), 0);

    // init main brush
    auto b = std::make_shared<Brush>();
    b->load_tip(m_brush_popup->get_texture_path(br_idx), m_brush_popup->get_thumb_path(br_idx));
    b->load_dual(m_brush_popup->get_texture_path(br_idx), m_brush_popup->get_thumb_path(br_idx));
    b->load_pattern(m_pattern_popup->get_texture_path(0), m_pattern_popup->get_thumb_path(0));
    b->m_tip_size = 30;
    b->m_tip_flow = .9f;
    b->m_tip_spacing = .1f;
    b->m_tip_opacity = 1.f;
    Canvas::I->m_current_brush = b;

    // BRUSH PRESETS

    m_preset_thumb = find<NodeImage>("preset-thumb");
    m_preset_thumb->m_use_mipmaps = true;
    m_preset_preview = find<NodeStrokePreview>("preset-preview");
    m_preset_preview->m_brush = b;
    m_preset_preview->draw_stroke();
    m_preset_button = find<NodeButtonCustom>("preset-button");
    m_preset_button->on_click = [this](Node*) {
        auto screen = root()->m_size;
        glm::vec2 pos = m_preset_button->m_pos + glm::vec2(m_preset_button->m_size.x, 0);
        root()->add_child(m_presets_popup);
        auto tick = root()->add_child<NodeImage>();
        tick->SetPositioning(YGPositionTypeAbsolute);
        tick->SetSize(16, 32);
        tick->SetPosition(pos.x, pos.y + (m_preset_button->m_size.y - 32) * 0.5f);
        tick->set_image("data/ui/popup-tick.png");
        root()->update();
        if ((pos.y + m_presets_popup->m_size.y) > screen.y) 
            pos.y = screen.y - m_presets_popup->m_size.y;
        if (pos.y < 0) 
            pos.y = 0;
        m_presets_popup->SetPosition(pos.x + 16, pos.y);
        m_presets_popup->mouse_capture();
        root()->update();

        m_presets_popup->on_popup_close = [this, tick](Node*) {
            tick->destroy();
        };

        m_presets_popup->on_brush_changed = [this](Node* target, std::shared_ptr<Brush>& b) {
            // don't change some params
            b->m_tip_size = Canvas::I->m_current_brush->m_tip_size;
            b->m_tip_color = Canvas::I->m_current_brush->m_tip_color;
            *Canvas::I->m_current_brush = *b;
            m_preview->draw_stroke();
            m_preset_preview->draw_stroke();
            m_brush_thumb->set_image(b->m_brush_thumb_path);
            m_dual_brush_thumb->set_image(b->m_dual_thumb_path);
            m_preset_thumb->set_image(b->m_brush_thumb_path);
            m_pattern_thumb->set_image(b->m_pattern_thumb_path);
            update_controls();
        };
    };

    // BRUSH TIP SHAPE

    m_brush_thumb = find<NodeImage>("tip-change-thumb");
    m_brush_thumb->set_image(m_brush_popup->get_thumb_path(br_idx));
    m_brush_button = find<NodeButtonCustom>("tip-change");
    m_brush_button->on_click = [this](Node*) {
        auto screen = root()->m_size;
        glm::vec2 pos = m_brush_button->m_pos + glm::vec2(m_brush_button->m_size.x, 0);
        root()->add_child(m_brush_popup);
        auto tick = root()->add_child<NodeImage>();
        tick->SetPositioning(YGPositionTypeAbsolute);
        tick->SetSize(16, 32);
        tick->SetPosition(pos.x, pos.y + (m_brush_button->m_size.y - 32) * 0.5f);
        tick->set_image("data/ui/popup-tick.png");
        root()->update();
        if ((pos.y + m_brush_popup->m_size.y) > screen.y)
            pos.y = screen.y - m_brush_popup->m_size.y;
        if (pos.y < 0)
            pos.y = 0;
        m_brush_popup->SetPosition(pos.x + 16, pos.y);
        m_brush_popup->mouse_capture();
        root()->update();

        m_brush_popup->on_popup_close = [this, tick](Node*) {
            tick->destroy();
        };

        m_brush_popup->on_brush_changed = [this](Node*, int index) {
            if (on_brush_changed)
                on_brush_changed(this, m_brush_popup->get_texture_path(index), m_brush_popup->get_thumb_path(index));
            m_brush_thumb->set_image(m_brush_popup->get_thumb_path(index));
            //m_brush_popup->mouse_release();
            //m_brush_popup->parent->remove_child(m_brush_popup.get());
        };
    };

    // DUAL BRUSH TIP SHAPE

    m_dual_brush_thumb = find<NodeImage>("dual-change-thumb");
    m_dual_brush_thumb->set_image(m_brush_popup->get_thumb_path(br_idx));
    m_dual_brush_button = find<NodeButtonCustom>("dual-change");
    m_dual_brush_button->on_click = [this](Node*) {
        auto screen = root()->m_size;
        glm::vec2 pos = m_dual_brush_button->m_pos + glm::vec2(m_dual_brush_button->m_size.x, 0);
        root()->add_child(m_brush_popup);
        auto tick = root()->add_child<NodeImage>();
        tick->SetPositioning(YGPositionTypeAbsolute);
        tick->SetSize(16, 32);
        tick->SetPosition(pos.x, pos.y + (m_dual_brush_button->m_size.y - 32) * 0.5f);
        tick->set_image("data/ui/popup-tick.png");
        root()->update();
        if ((pos.y + m_brush_popup->m_size.y) > screen.y)
            pos.y = screen.y - m_brush_popup->m_size.y;
        if (pos.y < 0)
            pos.y = 0;
        m_brush_popup->SetPosition(pos.x + 16, pos.y);
        m_brush_popup->mouse_capture();
        root()->update();

        m_brush_popup->on_popup_close = [this, tick](Node*) {
            tick->destroy();
        };

        m_brush_popup->on_brush_changed = [this](Node*, int index) {
            m_dual_enabled->set_value(true, true);
            if (on_dual_changed)
                on_dual_changed(this, m_brush_popup->get_texture_path(index), m_brush_popup->get_thumb_path(index));
            m_dual_brush_thumb->set_image(m_brush_popup->get_thumb_path(index));
        };
    };


    // PATTERN IMAGE

    m_pattern_thumb = find<NodeImage>("pattern-change-thumb");
    m_pattern_thumb->set_image(m_pattern_popup->get_thumb_path(0));
    m_pattern_button = find<NodeButtonCustom>("pattern-change");
    m_pattern_button->on_click = [this](Node*) {
        auto screen = root()->m_size;
        glm::vec2 pos = m_pattern_button->m_pos + glm::vec2(m_pattern_button->m_size.x, 0);
        root()->add_child(m_pattern_popup);
        auto tick = root()->add_child<NodeImage>();
        tick->SetPositioning(YGPositionTypeAbsolute);
        tick->SetSize(16, 32);
        tick->SetPosition(pos.x, pos.y + (m_pattern_button->m_size.y - 32) * 0.5f);
        tick->set_image("data/ui/popup-tick.png");
        root()->update();
        if ((pos.y + m_pattern_popup->m_size.y) > screen.y)
            pos.y = screen.y - m_pattern_popup->m_size.y;
        if (pos.y < 0)
            pos.y = 0;
        m_pattern_popup->SetPosition(pos.x + 16, pos.y);
        m_pattern_popup->mouse_capture();
        root()->update();

        m_pattern_popup->on_popup_close = [this, tick](Node*) {
            tick->destroy();
        };

        m_pattern_popup->on_brush_changed = [this](Node*, int index) {
            m_pattern_enabled->set_value(true, true);
            if (on_pattern_changed)
                on_pattern_changed(this, m_pattern_popup->get_texture_path(index), m_pattern_popup->get_thumb_path(index));
            m_pattern_thumb->set_image(m_pattern_popup->get_thumb_path(index));
        };
    };


    m_preview = find<NodeStrokePreview>("canvas");
    m_blend_mode = find<NodeComboBox>("blend-mode");
    m_blend_mode->on_select = [this](Node*, int index) {
        Canvas::I->m_current_brush->m_blend_mode = index;
        m_preview->draw_stroke();
        if (on_stroke_change)
            on_stroke_change(this);
    };

    init_slider(m_tip_size, "tip-size", &Brush::m_tip_size);
    init_slider(m_tip_spacing, "tip-spacing", &Brush::m_tip_spacing);
    init_slider(m_tip_flow, "tip-flow", &Brush::m_tip_flow);
    init_slider(m_tip_opacity, "tip-opacity", &Brush::m_tip_opacity);
    init_slider(m_tip_angle, "tip-angle", &Brush::m_tip_angle);
    init_slider(m_tip_angle_delay, "tip-angle-delay", &Brush::m_tip_angle_delay);
    init_slider(m_tip_mix, "tip-mix", &Brush::m_tip_mix);
    init_slider(m_tip_wet, "tip-wet", &Brush::m_tip_wet);
    init_slider(m_tip_noise, "tip-noise", &Brush::m_tip_noise);
    init_slider(m_tip_hue, "tip-hue", &Brush::m_tip_hue);
    init_slider(m_tip_sat, "tip-sat", &Brush::m_tip_sat);
    init_slider(m_tip_val, "tip-val", &Brush::m_tip_val);
    init_slider(m_jitter_scale, "jitter-scale", &Brush::m_jitter_scale);
    init_slider(m_jitter_angle, "jitter-angle", &Brush::m_jitter_angle);
    init_slider(m_jitter_spread, "jitter-spread", &Brush::m_jitter_spread);
    init_slider(m_jitter_flow, "jitter-flow", &Brush::m_jitter_flow);
    init_slider(m_jitter_hue, "jitter-hue", &Brush::m_jitter_hue);
    init_slider(m_jitter_sat, "jitter-sat", &Brush::m_jitter_sat);
    init_slider(m_jitter_val, "jitter-val", &Brush::m_jitter_val);

    init_checkbox(m_tip_angle_follow, "tip-angle-follow", &Brush::m_tip_angle_follow);
    init_checkbox(m_tip_flow_pressure, "tip-flow-pressure", &Brush::m_tip_flow_pressure);
    init_checkbox(m_tip_size_pressure, "tip-size-pressure", &Brush::m_tip_size_pressure);

    init_checkbox(m_tip_invert, "tip-invert", &Brush::m_tip_invert);
    init_checkbox(m_tip_flipx, "tip-flipx", &Brush::m_tip_flipx);
    init_checkbox(m_tip_flipy, "tip-flipy", &Brush::m_tip_flipy);
    init_checkbox(m_pattern_enabled, "pattern-enabled", &Brush::m_pattern_enabled);
    init_checkbox(m_dual_enabled, "dual-enabled", &Brush::m_dual_enabled);
    init_checkbox(m_dual_scatter_axis, "dual-scatter-axis", &Brush::m_dual_scatter_axis);
    init_checkbox(m_dual_invert, "dual-invert", &Brush::m_dual_invert);
    init_checkbox(m_dual_flipx, "dual-flipx", &Brush::m_dual_flipx);
    init_checkbox(m_dual_flipy, "dual-flipy", &Brush::m_dual_flipy);
    init_checkbox(m_dual_randflip, "dual-randflip", &Brush::m_dual_randflip);
    init_checkbox(m_tip_randflipx, "tip-randflipx", &Brush::m_tip_randflipx);
    init_checkbox(m_tip_randflipy, "tip-randflipy", &Brush::m_tip_randflipy);
    init_checkbox(m_pattern_eachsample, "pattern-eachsample", &Brush::m_pattern_eachsample);

    init_checkbox(m_pattern_invert, "pattern-invert", &Brush::m_pattern_invert);
    init_checkbox(m_pattern_flipx, "pattern-flipx", &Brush::m_pattern_flipx);
    init_checkbox(m_pattern_flipy, "pattern-flipy", &Brush::m_pattern_flipy);
    init_checkbox(m_pattern_rand_offset, "pattern-rand-offset", &Brush::m_pattern_rand_offset);

    init_slider(m_dual_size, "dual-size", &Brush::m_dual_size);
    init_slider(m_dual_spacing, "dual-spacing", &Brush::m_dual_spacing);
    init_slider(m_dual_scatter, "dual-scatter", &Brush::m_dual_scatter);
    init_slider(m_tip_aspect, "tip-aspect", &Brush::m_tip_aspect);
    init_slider(m_dual_opacity, "dual-opacity", &Brush::m_dual_opacity);
    init_slider(m_dual_flow, "dual-flow", &Brush::m_dual_flow);
    init_slider(m_dual_rotate, "dual-rotate", &Brush::m_dual_rotate);
    init_slider(m_pattern_scale, "pattern-scale", &Brush::m_pattern_scale);
    init_slider(m_pattern_brightness, "pattern-brightness", &Brush::m_pattern_brightness);
    init_slider(m_pattern_contrast, "pattern-contrast", &Brush::m_pattern_contrast);
    init_slider(m_pattern_depth, "pattern-depth", &Brush::m_pattern_depth);

    SliderCurve curve_cubic {
        [](float v) { return glm::pow(v, 3.f); },
        [](float v) { return glm::pow(v, 1.f / 3.f); },
    };
    SliderCurve curve_quad {
        [](float v) { return glm::pow(v, 2.f); },
        [](float v) { return glm::pow(v, 1.f / 2.f); },
    };
    SliderCurve curve_size1k_perc {
        [](float v) { 
            float ret = 0;
            if (v > 0.00f) ret += glm::pow(glm::min(1.f, (v - 0.00f) / 0.50f), 2.f) *  1.f;
            if (v > 0.50f) ret += glm::min(1.f, (v - 0.50f) / 0.25f) *  2.f;
            if (v > 0.75f) ret += glm::min(1.f, (v - 0.75f) / 0.10f) *  4.f;
            if (v > 0.85f) ret += glm::min(1.f, (v - 0.85f) / 0.05f) *  5.f;
            if (v > 0.90f) ret += glm::min(1.f, (v - 0.90f) / 0.10f) * 10.f;
            return glm::max(.01f, ret);
        },
        [](float v) { 
            float ret = 0;
            if (v >  0.f) ret += glm::pow(glm::min(1.f, (v - 0.f) /  1.f), 1.f / 2.f) * 0.50f;
            if (v >  1.f) ret += glm::min(1.f, (v - 1.f) /  2.f) * 0.25f;
            if (v >  2.f) ret += glm::min(1.f, (v - 2.f) /  4.f) * 0.10f;
            if (v >  4.f) ret += glm::min(1.f, (v - 4.f) /  5.f) * 0.05f;
            if (v >  5.f) ret += glm::min(1.f, (v - 5.f) / 10.f) * 0.10f;
            return ret;
        },
    };
    SliderCurve curve_size5k_pix {
        [](float v) {
            float ret = 0;
            if (v > 0.00f) ret += glm::pow(glm::min(1.f, (v - 0.00f) / 0.50f), 2.f) *  100.f;
            if (v > 0.50f) ret += glm::min(1.f, (v - 0.50f) / 0.25f) *  200.f;
            if (v > 0.75f) ret += glm::min(1.f, (v - 0.75f) / 0.10f) *  400.f;
            if (v > 0.85f) ret += glm::min(1.f, (v - 0.85f) / 0.05f) * 1000.f;
            if (v > 0.90f) ret += glm::min(1.f, (v - 0.90f) / 0.10f) * 5000.f;
            return glm::max(1.f, ret);
        },
        [](float v) {
            float ret = 0;
            if (v >    0.f) ret += glm::pow(glm::min(1.f, (v -    0.f) /  100.f), 1.f / 2.f) * 0.50f;
            if (v >  100.f) ret += glm::min(1.f, (v -  100.f) /  200.f) * 0.25f;
            if (v >  200.f) ret += glm::min(1.f, (v -  200.f) /  400.f) * 0.10f;
            if (v >  400.f) ret += glm::min(1.f, (v -  400.f) / 1000.f) * 0.05f;
            if (v > 1000.f) ret += glm::min(1.f, (v - 1000.f) / 5000.f) * 0.10f;
            return ret;
        },
    };

    m_curves[m_tip_size] = curve_size5k_pix;
    m_curves[m_tip_spacing] = curve_size1k_perc;
    m_curves[m_tip_flow] = curve_quad;
    m_curves[m_dual_size] = curve_size5k_pix;
    m_curves[m_dual_spacing] = curve_size1k_perc;
    m_curves[m_dual_flow] = curve_quad;
    m_curves[m_pattern_scale] = curve_size1k_perc;

    m_tip_aspect_reset = find<NodeButtonCustom>("tip-aspect-reset");
    m_tip_aspect_reset->on_click = [this](Node*) {
        m_tip_aspect->set_value(0.5);
        Canvas::I->m_current_brush->m_tip_aspect = 0.5f;
        m_preview->draw_stroke();
        if (on_stroke_change)
            on_stroke_change(this);
    };

    m_dual_blend_mode = find<NodeComboBox>("dual-blend-mode");
    m_dual_blend_mode->on_select = [this](Node*, int index) {
        Canvas::I->m_current_brush->m_dual_blend_mode = index;
        m_preview->draw_stroke();
        if (on_stroke_change)
            on_stroke_change(this);
    };

    m_pattern_blend_mode = find<NodeComboBox>("pattern-blend-mode");
    m_pattern_blend_mode->on_select = [this](Node*, int index) {
        Canvas::I->m_current_brush->m_pattern_blend_mode = index;
        m_preview->draw_stroke();
        if (on_stroke_change)
            on_stroke_change(this);
    };

    m_preview->m_brush = Canvas::I->m_current_brush;
    m_preview->draw_stroke();

    init_fold("color");
    init_fold("metrics");
    init_fold("pattern");
    init_fold("dualbrush");
    init_fold("medium");
    init_fold("colorvar");
    init_fold("jitter");

    update_controls();
}

void NodePanelStroke::init_slider(NodeSliderH*& target, const char* id, float Brush::* prop)
{
    target = find<NodeSliderH>(id);
    target->on_value_changed = std::bind(&NodePanelStroke::handle_slide,
        this, prop, std::placeholders::_1, std::placeholders::_2);
    //m_canvas->m_brush->*prop = target->m_value.x;
}

void NodePanelStroke::handle_slide(float Brush::* prop, Node* target, float value)
{
    auto curve = m_curves.find((NodeSliderH*)target);
    Canvas::I->m_current_brush.get()->*prop = curve != m_curves.end() ? curve->second.to_value(value) : value;
    m_preview->draw_stroke();
    if (on_stroke_change)
        on_stroke_change(this);
}

void NodePanelStroke::init_checkbox(NodeCheckBox*& target, const char* id, bool Brush::* prop)
{
    target = find<NodeCheckBox>(id);
    target->on_value_changed = std::bind(&NodePanelStroke::handle_checkbox,
        this, prop, std::placeholders::_1, std::placeholders::_2);
    Canvas::I->m_current_brush.get()->*prop = target->checked;
}

void NodePanelStroke::handle_checkbox(bool Brush::* prop, Node *target, bool value)
{
    Canvas::I->m_current_brush.get()->*prop = value;
    m_preview->draw_stroke();
    if (on_stroke_change)
        on_stroke_change(this);
}