Full mixer implementation — tray, popup, prefs, devices tab with port indicators

Adds the complete tmix feature set built since the initial skeleton:
balance knob, level meters, KLed mute button, system tray with scroll-wheel
volume and recording indicator, tray popup, preferences dialog, right-click
context menus, single-instance enforcement, scroll area, window geometry
persistence, and Devices tab with PA card profile switcher and live port
availability indicators (2-column layout, in-place updates on plug/unplug).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

1 files changed, 34 insertions, 0 deletions

diff --git a/src/ui/balanceknob.h b/src/ui/balanceknob.h
new file mode 100644
index 0000000..e8d0be2
--- /dev/null
+++ b/src/ui/balanceknob.h
@@ -0,0 +1,34 @@
+#pragma once
+
+#include <tqwidget.h>
+
+class BalanceKnob : public TQWidget
+{
+    TQ_OBJECT
+
+public:
+    BalanceKnob( int minVal, int maxVal, int val, TQWidget *parent = 0 );
+
+    int value() const { return m_value; }
+    TQSize sizeHint() const { return TQSize(30, 30); }
+
+public slots:
+    void setValue( int v );
+
+signals:
+    void valueChanged( int v );
+
+protected:
+    void paintEvent( TQPaintEvent * );
+    void mousePressEvent( TQMouseEvent *e );
+    void mouseMoveEvent( TQMouseEvent *e );
+    void mouseReleaseEvent( TQMouseEvent *e );
+    void mouseDoubleClickEvent( TQMouseEvent *e );
+    void wheelEvent( TQWheelEvent *e );
+
+private:
+    int    m_min, m_max, m_value;
+    int    m_dragY;
+    int    m_dragValue;
+    bool   m_dragging;
+};