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, 29 insertions, 0 deletions

diff --git a/src/ui/kledbutton.cpp b/src/ui/kledbutton.cpp
new file mode 100644
index 0000000..f3b5ecc
--- /dev/null
+++ b/src/ui/kledbutton.cpp
@@ -0,0 +1,29 @@
+#include "kledbutton.h"
+#include <tqsizepolicy.h>
+
+KLedButton::KLedButton( const TQColor &col, TQWidget *parent, const char *name )
+    : KLed( col, parent, name )
+{
+}
+
+KLedButton::KLedButton( const TQColor &col, KLed::State st, KLed::Look look,
+                        KLed::Shape shape, TQWidget *parent, const char *name )
+    : KLed( col, st, look, shape, parent, name )
+{
+}
+
+void KLedButton::mousePressEvent( TQMouseEvent *e )
+{
+    if ( e->button() == TQt::LeftButton ) {
+        toggle();
+        emit stateChanged( state() == KLed::On );
+    }
+}
+
+TQSize KLedButton::sizeHint() const       { return TQSize( 22, 22 ); }
+TQSizePolicy KLedButton::sizePolicy() const
+{
+    return TQSizePolicy( TQSizePolicy::Fixed, TQSizePolicy::Fixed );
+}
+
+#include "kledbutton.moc"