Use less pointers in frontend

src/frontend/SettingsWindow.hpp

@@ -6,14 +6,23 @@
 #include <QPushButton>
 #include <QTabWidget>
 #include <QWidget>
+#include <QButtonGroup>
+#include <QFileDialog>
+#include <QGroupBox>
+#include <QVBoxLayout>
 
 class SettingsWindow : public QWidget {
-  QPushButton *cancel = new QPushButton("Cancel");
-  QPushButton *apply = new QPushButton("Apply");
-  QFileIconProvider *iconProv = new QFileIconProvider;
-  QPushButton *folderBtn = new QPushButton(iconProv->icon(QFileIconProvider::Folder), "");
-  QLabel *folderLabelPrefix;
-  QLabel *folderLabel;
+  std::unique_ptr<QPushButton> cancel = std::make_unique<QPushButton>("Cancel");
+  std::unique_ptr<QPushButton> apply = std::make_unique<QPushButton>("Apply");
+  std::unique_ptr<QFileIconProvider> iconProv = std::make_unique<QFileIconProvider>();
+  std::unique_ptr<QPushButton> folderBtn = std::make_unique<QPushButton>(iconProv->icon(QFileIconProvider::Folder), "");
+  std::unique_ptr<QLabel> folderLabelPrefix = std::make_unique<QLabel>("Save files' path: ");
+  std::unique_ptr<QLabel> folderLabel;
+  std::unique_ptr<QHBoxLayout> generalLayout = std::make_unique<QHBoxLayout>();
+  std::unique_ptr<QVBoxLayout> generalLayoutV = std::make_unique<QVBoxLayout>();
+  std::unique_ptr<QTabWidget> tabs = std::make_unique<QTabWidget>();
+  std::unique_ptr<QVBoxLayout> mainLayout = std::make_unique<QVBoxLayout>();
+  std::unique_ptr<QHBoxLayout> buttonsLayout = std::make_unique<QHBoxLayout>();
   Q_OBJECT
 public:
   float getVolumeL() { return float(audioSettings->volumeL->value()) / 100.f; }
@@ -21,10 +30,10 @@ public:
   std::array<Qt::Key, 18> keyMap{};
   SettingsWindow();
   nlohmann::json settings;
-  CPUSettings *cpuSettings;
-  AudioSettings *audioSettings;
-  InputSettings *inputSettings;
-  QWidget *generalSettings;
+  std::unique_ptr<CPUSettings> cpuSettings{};
+  std::unique_ptr<AudioSettings> audioSettings{};
+  std::unique_ptr<InputSettings> inputSettings{};
+  std::unique_ptr<QWidget> generalSettings{};
 Q_SIGNALS:
   void regrabKeyboard();
 };