feat(cpp/core): parallel_for thread pool + slider widget

parallel_for_cpp_core: ThreadPool reutilizable con parallel_for(begin, end, fn) y parallel_for_chunks(begin, end, fn(tid, lo, hi)). Captura excepciones del worker y las relanza en el caller. Pareja CPU del despacho GPU para Monte Carlo multi-core cuando dispatch GPU no compensa. slider_cpp_core: wrapper de ImGui::SliderFloat/Int/Double con label muted arriba, tokens (primary grab), full-width. Variantes float, float_log (logaritmico), int, double. Para los calculadores que tienen 15-30 sliders cada uno y se beneficia del estilo consistente. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-05-04 11:52:50 +02:00
parent 7b0384c804
commit ea899daa14
6 changed files with 436 additions and 0 deletions
@@ -0,0 +1,80 @@
+#include "core/slider.h"
+#include "core/tokens.h"
+#include <imgui.h>
+#include <cstdio>
+
+namespace fn_ui {
+
+static void push_slider_style() {
+    using namespace fn_tokens;
+    ImGui::PushStyleColor(ImGuiCol_FrameBg,        colors::bg);
+    ImGui::PushStyleColor(ImGuiCol_FrameBgHovered, colors::surface_hover);
+    ImGui::PushStyleColor(ImGuiCol_FrameBgActive,  colors::surface);
+    ImGui::PushStyleColor(ImGuiCol_Border,         colors::border);
+    ImGui::PushStyleColor(ImGuiCol_SliderGrab,       colors::primary);
+    ImGui::PushStyleColor(ImGuiCol_SliderGrabActive, colors::primary_hover);
+    ImGui::PushStyleVar(ImGuiStyleVar_FrameRounding,   radius::sm);
+    ImGui::PushStyleVar(ImGuiStyleVar_FrameBorderSize, 1.0f);
+    ImGui::PushStyleVar(ImGuiStyleVar_GrabRounding,    radius::sm);
+}
+
+static void pop_slider_style() {
+    ImGui::PopStyleVar(3);
+    ImGui::PopStyleColor(6);
+}
+
+static void label_muted(const char* label) {
+    using namespace fn_tokens;
+    ImGui::PushStyleColor(ImGuiCol_Text, colors::text_muted);
+    ImGui::TextUnformatted(label);
+    ImGui::PopStyleColor();
+}
+
+bool slider_float(const char* label, float* value,
+                  float min_v, float max_v, const char* fmt) {
+    label_muted(label);
+    push_slider_style();
+    char id[160];
+    std::snprintf(id, sizeof(id), "##%s", label);
+    ImGui::SetNextItemWidth(-FLT_MIN);
+    bool changed = ImGui::SliderFloat(id, value, min_v, max_v, fmt);
+    pop_slider_style();
+    return changed;
+}
+
+bool slider_float_log(const char* label, float* value,
+                      float min_v, float max_v, const char* fmt) {
+    label_muted(label);
+    push_slider_style();
+    char id[160];
+    std::snprintf(id, sizeof(id), "##%s", label);
+    ImGui::SetNextItemWidth(-FLT_MIN);
+    bool changed = ImGui::SliderFloat(id, value, min_v, max_v, fmt,
+                                      ImGuiSliderFlags_Logarithmic);
+    pop_slider_style();
+    return changed;
+}
+
+bool slider_int(const char* label, int* value,
+                int min_v, int max_v, const char* fmt) {
+    label_muted(label);
+    push_slider_style();
+    char id[160];
+    std::snprintf(id, sizeof(id), "##%s", label);
+    ImGui::SetNextItemWidth(-FLT_MIN);
+    bool changed = ImGui::SliderInt(id, value, min_v, max_v, fmt);
+    pop_slider_style();
+    return changed;
+}
+
+bool slider_double(const char* label, double* value,
+                   double min_v, double max_v, const char* fmt) {
+    float fv = static_cast<float>(*value);
+    bool changed = slider_float(label, &fv,
+                                static_cast<float>(min_v),
+                                static_cast<float>(max_v), fmt);
+    if (changed) *value = static_cast<double>(fv);
+    return changed;
+}
+
+} // namespace fn_ui