Initial tmix skeleton — model layer + basic UI

PulseModel: stable PulseDevice objects keyed by PA index, updated
in-place via postEvent reconciliation. No bulk rebuilds. Three signals:
deviceAdded, deviceRemoved (device changed handled per-device via
volumeChanged/muteChanged/nameChanged).

MixerWindow: four-tab layout (Output/Input/Playback/Recording), adds
and removes individual DeviceWidgets in response to model signals.

Builds and links cleanly against TQt3/TDE + libpulse.

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

1 files changed, 43 insertions, 0 deletions

diff --git a/src/ui/mixerwindow.h b/src/ui/mixerwindow.h
new file mode 100644
index 0000000..f6b7be8
--- /dev/null
+++ b/src/ui/mixerwindow.h
@@ -0,0 +1,43 @@
+#pragma once
+
+#include <tqwidget.h>
+#include <tqmap.h>
+
+#include "../model/audiodevice.h"
+
+class PulseModel;
+class KTabWidget;
+class TQHBoxLayout;
+
+class MixerWindow : public TQWidget
+{
+    TQ_OBJECT
+
+public:
+    explicit MixerWindow( PulseModel *model, TQWidget *parent = 0 );
+    ~MixerWindow() {}
+
+private slots:
+    void onDeviceAdded( AudioDevice *dev );
+    void onDeviceRemoved( AudioDevice *dev );
+
+public:
+    struct Tab {
+        TQWidget      *page;
+        TQHBoxLayout  *layout;
+    };
+
+private:
+
+    Tab &tabForCategory( AudioDevice::Category cat );
+
+    PulseModel *m_model;
+    KTabWidget *m_tabs;
+
+    Tab m_output;
+    Tab m_input;
+    Tab m_playback;
+    Tab m_recording;
+
+    TQMap<AudioDevice*, TQWidget*> m_widgets;
+};