1 files changed, 105 insertions, 0 deletions
diff --git a/examples/multimedia/spectrum/mainwidget.h b/examples/multimedia/spectrum/mainwidget.h
new file mode 100644
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+++ b/examples/multimedia/spectrum/mainwidget.h
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+// Copyright (C) 2017 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#ifndef MAINWIDGET_H
+#define MAINWIDGET_H
+
+#include <QAudioDevice>
+#include <QIcon>
+#include <QWidget>
+
+class Engine;
+class FrequencySpectrum;
+class LevelMeter;
+class ProgressBar;
+class SettingsDialog;
+class Spectrograph;
+class ToneGeneratorDialog;
+class Waveform;
+
+QT_BEGIN_NAMESPACE
+class QAction;
+class QAudioFormat;
+class QLabel;
+class QMenu;
+class QPushButton;
+QT_END_NAMESPACE
+
+/**
+ * Main application widget, responsible for connecting the various UI
+ * elements to the Engine.
+ */
+class MainWidget : public QWidget
+{
+    Q_OBJECT
+
+public:
+    explicit MainWidget(QWidget *parent = nullptr);
+    ~MainWidget();
+
+    // QObject
+    void timerEvent(QTimerEvent *event) override;
+
+public slots:
+    void stateChanged(QAudioDevice::Mode mode, QAudio::State state);
+    void formatChanged(const QAudioFormat &format);
+    void spectrumChanged(qint64 position, qint64 length, const FrequencySpectrum &spectrum);
+    void infoMessage(const QString &message, int timeoutMs);
+    void errorMessage(const QString &heading, const QString &detail);
+    void audioPositionChanged(qint64 position);
+    void bufferLengthChanged(qint64 length);
+
+private slots:
+    void showFileDialog();
+    void showSettingsDialog();
+    void showToneGeneratorDialog();
+    void initializeRecord();
+    void updateModeMenu();
+    void updateButtonStates();
+
+private:
+    void createUi();
+    void createMenus();
+    void connectUi();
+    void reset();
+
+    enum Mode { NoMode, RecordMode, GenerateToneMode, LoadFileMode };
+
+    void setMode(Mode mode);
+
+private:
+    Mode m_mode;
+
+    Engine *m_engine;
+
+#ifndef DISABLE_WAVEFORM
+    Waveform *m_waveform;
+#endif
+    ProgressBar *m_progressBar;
+    Spectrograph *m_spectrograph;
+    LevelMeter *m_levelMeter;
+
+    QPushButton *m_modeButton;
+    QPushButton *m_recordButton;
+    QIcon m_recordIcon;
+    QPushButton *m_pauseButton;
+    QIcon m_pauseIcon;
+    QPushButton *m_playButton;
+    QIcon m_playIcon;
+    QPushButton *m_settingsButton;
+    QIcon m_settingsIcon;
+
+    QLabel *m_infoMessage;
+    int m_infoMessageTimerId;
+
+    SettingsDialog *m_settingsDialog;
+    ToneGeneratorDialog *m_toneGeneratorDialog;
+
+    QMenu *m_modeMenu;
+    QAction *m_loadFileAction;
+    QAction *m_generateToneAction;
+    QAction *m_recordAction;
+    bool m_errorOccurred;
+};
+
+#endif // MAINWIDGET_H