feat: add C++ ImGui functions for core UI and visualization

Funciones C++/ImGui para dashboards (grid, panel, docking, sidebar, tabs), visualizaciones (candlestick, gauge, histogram, pie, sparkline, heatmap, scatter, line, bar, surface3d, kpi, table), grafos (force layout, renderer, viewport, spatial hash, types) y utilidades (time series buffer, tracy zones, memory/fps overlay, plot theme). Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
2026-04-08 00:10:18 +02:00
parent af9ebd1e0a
commit 0bdf35a461
66 changed files with 4236 additions and 0 deletions
@@ -0,0 +1,94 @@
+#include "viz/gauge.h"
+#include "imgui.h"
+#include <cmath>
+#include <cstdio>
+
+#ifndef M_PI
+#define M_PI 3.14159265358979323846f
+#endif
+
+void gauge(const char* label, float value, float min_val, float max_val, float radius) {
+    ImDrawList* draw_list = ImGui::GetWindowDrawList();
+    ImVec2 pos = ImGui::GetCursorScreenPos();
+
+    // Reserve space: diameter + label line
+    float diameter = radius * 2.0f;
+    ImGui::Dummy(ImVec2(diameter, diameter + ImGui::GetTextLineHeightWithSpacing()));
+
+    ImVec2 center = ImVec2(pos.x + radius, pos.y + radius);
+
+    // Arc spans 240 degrees: from 150deg to 390deg (i.e. 150 to 30 going clockwise)
+    // In screen space Y is down, so angles go clockwise.
+    // Start angle: 150 degrees = bottom-left, End angle: 390 = 30 degrees = bottom-right
+    const float angle_start = (150.0f * (float)M_PI) / 180.0f;
+    const float angle_end   = (390.0f * (float)M_PI) / 180.0f;
+    const int   num_segments = 64;
+
+    // Background arc (dark gray)
+    ImU32 bg_color = IM_COL32(60, 60, 60, 220);
+    for (int i = 0; i < num_segments; i++) {
+        float a0 = angle_start + (angle_end - angle_start) * ((float)i       / num_segments);
+        float a1 = angle_start + (angle_end - angle_start) * ((float)(i + 1) / num_segments);
+        draw_list->AddLine(
+            ImVec2(center.x + cosf(a0) * radius, center.y + sinf(a0) * radius),
+            ImVec2(center.x + cosf(a1) * radius, center.y + sinf(a1) * radius),
+            bg_color, 6.0f);
+    }
+
+    // Normalize value to [0, 1]
+    float t = 0.0f;
+    if (max_val > min_val) {
+        t = (value - min_val) / (max_val - min_val);
+        if (t < 0.0f) t = 0.0f;
+        if (t > 1.0f) t = 1.0f;
+    }
+
+    // Color: green (t=0) -> yellow (t=0.5) -> red (t=1)
+    float r, g, b;
+    if (t < 0.5f) {
+        float s = t * 2.0f;
+        r = (unsigned char)(s * 255);
+        g = 200;
+        b = 0;
+    } else {
+        float s = (t - 0.5f) * 2.0f;
+        r = 220;
+        g = (unsigned char)((1.0f - s) * 200);
+        b = 0;
+    }
+    ImU32 value_color = IM_COL32((int)r, (int)g, (int)b, 255);
+
+    // Value arc
+    float angle_value = angle_start + (angle_end - angle_start) * t;
+    int value_segments = (int)(num_segments * t);
+    for (int i = 0; i < value_segments; i++) {
+        float a0 = angle_start + (angle_end - angle_start) * ((float)i       / num_segments);
+        float a1 = angle_start + (angle_end - angle_start) * ((float)(i + 1) / num_segments);
+        draw_list->AddLine(
+            ImVec2(center.x + cosf(a0) * radius, center.y + sinf(a0) * radius),
+            ImVec2(center.x + cosf(a1) * radius, center.y + sinf(a1) * radius),
+            value_color, 6.0f);
+    }
+
+    // Needle: line from center to arc at current angle
+    float needle_len = radius * 0.75f;
+    ImVec2 needle_tip = ImVec2(
+        center.x + cosf(angle_value) * needle_len,
+        center.y + sinf(angle_value) * needle_len);
+    draw_list->AddLine(center, needle_tip, IM_COL32(255, 255, 255, 240), 2.0f);
+    draw_list->AddCircleFilled(center, 4.0f, IM_COL32(255, 255, 255, 200));
+
+    // Value text centered
+    char val_buf[32];
+    snprintf(val_buf, sizeof(val_buf), "%.1f", value);
+    ImVec2 val_size = ImGui::CalcTextSize(val_buf);
+    draw_list->AddText(
+        ImVec2(center.x - val_size.x * 0.5f, center.y + radius * 0.35f),
+        IM_COL32(230, 230, 230, 255), val_buf);
+
+    // Label below value
+    ImVec2 label_size = ImGui::CalcTextSize(label);
+    draw_list->AddText(
+        ImVec2(center.x - label_size.x * 0.5f, center.y + radius * 0.35f + val_size.y + 2.0f),
+        IM_COL32(180, 180, 180, 200), label);
+}