Fix labels in dark mode

CHANGELOG.md

@@ -7,6 +7,9 @@
 ### 🌀 Changed
 - Faster scrolling/zooming for long recordings at high zoom-out levels (uses a per-pixel min–max envelope with automatic downsampling depending on the zoom level)
 
+### 🔧 Fixed
+- Fix label colors in dark mode (they are now light)
+
 ## [0.6.5] · 2026-03-24
 ### 🌀 Changed
 - Switch from Qt 5 to Qt 6

src/gui/signal_browser/label_widget.cpp

@@ -15,7 +15,7 @@ LabelWidget::LabelWidget (QSharedPointer<SignalViewSettings const> signal_view_s
 : signal_view_settings_ (signal_view_settings),
   y_start_ (0),
   enable_separator_ (true),
-  label_color_ (Qt::black)
+  label_color_ (palette().color(QPalette::WindowText))
 {
     // nothing to do here
 }
@@ -40,6 +40,16 @@ void LabelWidget::changeLabelColor(QColor labelColor)
     update();
 }
 
+void LabelWidget::changeEvent(QEvent* event)
+{
+    if (event->type() == QEvent::PaletteChange)
+    {
+        label_color_ = palette().color(QPalette::WindowText);
+        update();
+    }
+    QWidget::changeEvent(event);
+}
+
 
 //-----------------------------------------------------------------------------
 void LabelWidget::paintEvent(QPaintEvent*)

src/gui/signal_browser/label_widget.h

@@ -34,6 +34,7 @@ public slots:
 protected:
     void paintEvent(QPaintEvent* pe);
     virtual void contextMenuEvent (QContextMenuEvent* event);
+    virtual void changeEvent(QEvent* event);
 
 private:
     QSharedPointer<SignalViewSettings const> signal_view_settings_;

src/gui/signal_browser/signal_browser_view.cpp

@@ -22,6 +22,8 @@
 #include <QDebug>
 #include <QResizeEvent>
 #include <QGraphicsLinearLayout>
+#include <QApplication>
+#include <QPalette>
 
 #include <math.h>       /* round */
 
@@ -342,6 +344,14 @@ void SignalBrowserView::dropEvent (QDropEvent* event)
     event->ignore();
 }
 
+//-----------------------------------------------------------------------------
+void SignalBrowserView::changeEvent(QEvent* event)
+{
+    if (event->type() == QEvent::PaletteChange)
+        emit model_->getSignalViewSettings()->labelColorChanged(palette().color(QPalette::WindowText));
+    QFrame::changeEvent(event);
+}
+
 //-----------------------------------------------------------------------------
 void SignalBrowserView::dragEnterEvent(QDragEnterEvent *event)
 {

src/gui/signal_browser/signal_browser_view.h

@@ -83,6 +83,7 @@ private slots:
     void verticalScrollBarRangeChaned (int min, int max);
     virtual void dropEvent (QDropEvent* event);
     virtual void dragEnterEvent(QDragEnterEvent *event);
+    virtual void changeEvent(QEvent* event);
     void graphicsViewResized (QResizeEvent* event);
     void toggleXWidget(bool enabled);
 

src/gui/signal_browser/signal_graphics_item.cpp

@@ -15,6 +15,8 @@
 #include <QGraphicsSceneMouseEvent>
 #include <QToolTip>
 #include <QSettings>
+#include <QApplication>
+#include <QPalette>
 #include <cmath>
 #include <limits>
 
@@ -48,7 +50,7 @@ SignalGraphicsItem::SignalGraphicsItem (QSharedPointer<SignalViewSettings const>
   created_event_item_ (0),
   hand_tool_on_ (false),
   grid_color_ (QColor(220, 220, 220, 50)),   //set the default grid color
-  label_color_ (Qt::black)
+  label_color_ (QApplication::palette().color(QPalette::WindowText))
 {
     setFlag(QGraphicsItem::ItemUsesExtendedStyleOption, true);
     setAcceptHoverEvents(false);

src/gui/signal_browser/x_axis_widget_4.cpp

@@ -34,7 +34,7 @@ XAxisWidget::XAxisWidget (QSharedPointer<SignalViewSettings const> signal_view_s
     length_in_sec_ (0),
     highlighting_enabled_ (false),
     time_to_highlight_ (0),
-    label_color_ (Qt::black)
+    label_color_ (palette().color(QPalette::WindowText))
 {
 
 }
@@ -82,6 +82,16 @@ void XAxisWidget::changeLabelColor(QColor labelColor)
     update();
 }
 
+void XAxisWidget::changeEvent(QEvent* event)
+{
+    if (event->type() == QEvent::PaletteChange)
+    {
+        label_color_ = palette().color(QPalette::WindowText);
+        update();
+    }
+    QWidget::changeEvent(event);
+}
+
 //-----------------------------------------------------------------------------
 void XAxisWidget::paintEvent(QPaintEvent*)
 {

src/gui/signal_browser/x_axis_widget_4.h

@@ -34,6 +34,7 @@ public slots:
     virtual void paintEvent(QPaintEvent*);
     virtual void contextMenuEvent (QContextMenuEvent* event);
     virtual void timerEvent (QTimerEvent* event);
+    virtual void changeEvent(QEvent* event);
 
     QSharedPointer<SignalViewSettings const> signal_view_settings_;
     float64 intervall_;

src/gui/signal_browser/y_axis_widget_4.cpp

@@ -25,7 +25,7 @@ YAxisWidget::YAxisWidget (QWidget* parent, QSharedPointer<const SignalViewSettin
     channel_height_ (0),
     y_start_ (0),
     signal_view_settings_ (signal_view_settings),
-    label_color_ (Qt::black)
+    label_color_ (palette().color(QPalette::WindowText))
 {
     // nothing to do here
 }
@@ -83,6 +83,16 @@ void YAxisWidget::changeLabelColor(QColor labelColor)
     update();
 }
 
+void YAxisWidget::changeEvent(QEvent* event)
+{
+    if (event->type() == QEvent::PaletteChange)
+    {
+        label_color_ = palette().color(QPalette::WindowText);
+        update();
+    }
+    QWidget::changeEvent(event);
+}
+
 //!this section is set to be consistent with label_widget.cpp----------------
 void YAxisWidget::paintEvent(QPaintEvent*)
 {

src/gui/signal_browser/y_axis_widget_4.h

@@ -39,6 +39,7 @@ public slots:
 private:
     virtual void paintEvent (QPaintEvent* event = 0);
     virtual void contextMenuEvent (QContextMenuEvent* event);
+    virtual void changeEvent(QEvent* event);
 
     void paintYAxisLabels (QPainter* painter, float64 offset,
                            float64 y_grid_pixel_intervall,