默认暗色模式，添加值显示开关

components/charts/heatmap.impl.hh

@@ -19,7 +19,13 @@
 using namespace creeper::plot_widget::internal;
 
 struct BasicPlot::Impl {
-    explicit Impl(BasicPlot& self) noexcept : self{self}, initialized(false), matrix_size(QSize{3, 4}) {}
+    explicit Impl(BasicPlot& self) noexcept
+        : matrix_size(QSize{3, 4})
+        , color_min(0.0)
+        , color_max(800.0)
+        , show_labels(false)
+        , initialized(false)
+        , self{self} { }
 
 public:
     std::optional<creeper::ColorScheme> scheme;
@@ -41,10 +47,15 @@ public:
 
     auto set_matrix_size(const QSize& size) -> void {
         matrix_size = size;
+        const int expected = std::max(0, matrix_size.width() * matrix_size.height());
+        last_values.assign(static_cast<std::size_t>(expected), 0.0);
         if (initialized) {
             reset_plot();
             if (!data_points.isEmpty()) {
                 set_data(data_points);
+            } else if (show_labels) {
+                sync_labels(last_values);
+                self.replot();
             }
         }
     }
@@ -75,6 +86,18 @@ public:
         }
     }
 
+    auto set_labels_visible(bool visible) -> void {
+        show_labels = visible;
+        if (initialized) {
+            sync_labels(last_values);
+            self.replot();
+        }
+    }
+
+    auto labels_visible() const -> bool {
+        return show_labels;
+    }
+
     auto initialize_plot() -> void {
         if (initialized) return;
 
@@ -149,12 +172,12 @@ public:
 
     auto reset_plot() -> void {
         // 清除所有绘图元素
+        clear_labels();
         self.clearPlottables();
         self.clearGraphs();
         self.clearItems();
         self.clearFocus();
         color_map = nullptr;
-        cell_labels.clear();
         
         // 重新初始化
         initialized = false;
@@ -163,7 +186,7 @@ public:
     auto update_plot_data() -> void {
         if (!initialized || !color_map) return;
 
-        ensure_labels();
+        // ensure_labels();
 
         const int width = matrix_size.width();
         const int height = matrix_size.height();
@@ -182,7 +205,8 @@ public:
             }
         }
 
-        update_label_values(values);
+        last_values = values;
+        sync_labels(last_values);
         
         // 重绘
         self.replot();
@@ -201,8 +225,10 @@ private:
     QString ylabel;
     QSize matrix_size;
     QVector<PointData> data_points;
+    std::vector<double> last_values;
     double color_min = 0.0;
     double color_max = 800.0;
+    bool show_labels = false;
     bool initialized;
     BasicPlot& self;
     QCPColorScale* color_scale = nullptr;
@@ -217,7 +243,7 @@ private:
                 text_color = scheme->on_surface;
             }
         }
-        label_text_color = QColor(0, 0, 0); // 固定黑色
+        label_text_color = text_color;
 
         const auto pen = QPen(text_color);
 
@@ -293,7 +319,6 @@ private:
     void update_label_values(const std::vector<double>& values) {
         const int width = matrix_size.width();
         const int height = matrix_size.height();
-        const double range = std::max(color_max - color_min, 1.0);
         const int expected = width * height;
         for (int idx = 0; idx < expected && idx < cell_labels.size(); ++idx) {
             auto* label = cell_labels[idx];
@@ -309,6 +334,18 @@ private:
             label->position->setCoords(x + 0.5, y + 0.5);
         }
     }
+
+    void sync_labels(const std::vector<double>& values) {
+        if (!initialized) {
+            return;
+        }
+        if (show_labels) {
+            ensure_labels();
+            update_label_values(values);
+        } else if (!cell_labels.isEmpty()) {
+            clear_labels();
+        }
+    }
 };
 
 #endif // TOUCHSENSOR_HEATMAP_IMPL_HH