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videoviewerwidget.h

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+#ifndef VIDEOVIEWERWIDGET_H
+#define VIDEOVIEWERWIDGET_H
+
+#include <QWidget>
+#include <QPushButton>
+#include <QComboBox>
+#include <QLineEdit>
+#include <QLabel>
+#include <gst/gst.h>
+
+class VideoViewerWidget : public QWidget
+{
+    Q_OBJECT
+
+public:
+    explicit VideoViewerWidget(QWidget *parent = nullptr);
+    ~VideoViewerWidget();
+
+protected:
+    void showEvent(QShowEvent* event) override;
+
+private slots:
+    void onStartViewer();
+    void onStopViewer();
+    void onSourceTypeChanged(int index);
+
+private:
+    void setupUI();
+    void initGStreamer();
+    void cleanupGStreamer();
+    void startPipeline();
+    void stopPipeline();
+    QString buildPipelineString();
+    void setupVideoOverlay();
+
+    static gboolean busCallback(GstBus* bus, GstMessage* msg, gpointer data);
+    static void onPrepareWindowHandle(GstBus* bus, GstMessage* msg, gpointer data);
+
+    // UI elements
+    QWidget* m_videoContainer;
+    QPushButton* m_startBtn;
+    QPushButton* m_stopBtn;
+    QComboBox* m_sourceType;
+    QLineEdit* m_hostEdit;
+    QLineEdit* m_portEdit;
+    QLabel* m_statusLabel;
+
+    // GStreamer elements
+    GstElement* m_pipeline;
+    GstElement* m_videoSink;
+    guint m_busWatchId;
+    WId m_windowId;
+};
+
+#endif // VIDEOVIEWERWIDGET_H