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, 24 insertions, 0 deletions

diff --git a/src/ui/kledbutton.h b/src/ui/kledbutton.h
new file mode 100644
index 0000000..3bdadaa
--- /dev/null
+++ b/src/ui/kledbutton.h
@@ -0,0 +1,24 @@
+#pragma once
+
+#include <tqwidget.h>
+#include <kled.h>
+
+class KLedButton : public KLed
+{
+    TQ_OBJECT
+
+public:
+    KLedButton( const TQColor &col = TQt::green, TQWidget *parent = 0, const char *name = 0 );
+    KLedButton( const TQColor &col, KLed::State st, KLed::Look look, KLed::Shape shape,
+                TQWidget *parent = 0, const char *name = 0 );
+    ~KLedButton() {}
+
+    TQSize       sizeHint()   const;
+    TQSizePolicy sizePolicy() const;
+
+signals:
+    void stateChanged( bool newState );
+
+protected:
+    void mousePressEvent( TQMouseEvent *e );
+};