Move source files to src directory

src/settingsdialog.h

@@ -0,0 +1,37 @@
+#ifndef SETTINGSDIALOG_H
+#define SETTINGSDIALOG_H
+
+#include <QDialog>
+#include <QSpinBox>
+#include <QCheckBox>
+#include <QComboBox>
+#include <QListWidget>
+
+class SettingsDialog : public QDialog
+{
+    Q_OBJECT
+public:
+    explicit SettingsDialog(QWidget *parent = nullptr);
+    static void loadSettings();
+    static bool loadThumbsizes();
+public slots:
+    void installThumbnailer();
+signals:
+    void preloadChanged(int witdth);
+private:
+    void saveSettings();
+
+    QSpinBox *m_preloadImages;
+    QSpinBox *m_thumSize;
+    QDoubleSpinBox *m_slideShowTime;
+    QDoubleSpinBox *m_saturation;
+    QCheckBox *m_useNativeDialog;
+    QCheckBox *m_qualityThumbnail;
+    QComboBox *m_filtering;
+    QCheckBox *m_bestFit;
+    QListWidget *m_headerHighlight;
+    QColor m_color = Qt::yellow;
+    QLineEdit *m_keyword;
+};
+
+#endif // SETTINGSDIALOG_H