chore: adjusted the project directory structure

app/settingsdialog.cpp

@@ -0,0 +1,53 @@
+#include "settingsdialog.h"
+
+#include "settings.h"
+
+#include <QCheckBox>
+#include <QComboBox>
+#include <QFormLayout>
+#include <QStringListModel>
+
+SettingsDialog::SettingsDialog(QWidget *parent)
+    : QDialog(parent)
+    , m_stayOnTop(new QCheckBox)
+    , m_doubleClickBehavior(new QComboBox)
+{
+    this->setWindowTitle(tr("Settings"));
+
+    QFormLayout * settingsForm = new QFormLayout(this);
+
+    static QMap<DoubleClickBehavior, QString> _map {
+        { ActionDoNothing, tr("Do nothing") },
+        { ActionCloseWindow, tr("Close the window") },
+        { ActionMaximizeWindow, tr("Toggle maximize") }
+    };
+
+    QStringList dropDown;
+    for (int dcb = ActionStart; dcb <= ActionEnd; dcb++) {
+        dropDown.append(_map.value(static_cast<DoubleClickBehavior>(dcb)));
+    }
+
+    settingsForm->addRow(tr("Stay on top when start-up"), m_stayOnTop);
+    settingsForm->addRow(tr("Double-click behavior"), m_doubleClickBehavior);
+
+    m_stayOnTop->setChecked(Settings::instance()->stayOnTop());
+    m_doubleClickBehavior->setModel(new QStringListModel(dropDown));
+    DoubleClickBehavior dcb = Settings::instance()->doubleClickBehavior();
+    m_doubleClickBehavior->setCurrentIndex(static_cast<int>(dcb));
+
+    connect(m_stayOnTop, &QCheckBox::stateChanged, this, [ = ](int state){
+        Settings::instance()->setStayOnTop(state == Qt::Checked);
+    });
+
+    connect(m_doubleClickBehavior, QOverload<int>::of(&QComboBox::currentIndexChanged), this, [ = ](int index){
+        Settings::instance()->setDoubleClickBehavior(static_cast<DoubleClickBehavior>(index));
+    });
+
+    this->setMinimumSize(300, 61); // not sure why it complain "Unable to set geometry"
+    setWindowFlag(Qt::WindowContextHelpButtonHint, false);
+}
+
+SettingsDialog::~SettingsDialog()
+{
+
+}