chooser for the algorithm

src/include/trainWindow.h

@@ -6,5 +6,12 @@
 
 extern QMainWindow *trainWindow;
 
+enum PracticeAlgorithm {
+	PRIMARY,
+	RANDOM,
+	SPACED,
+};
+
 void initTrainWindow();
-void setQuestions(std::vector<Question*> questions);
+void setQuestions(std::vector<Question*> questions, PracticeAlgorithm algorithm);
+

src/qtapp/main.cpp

@@ -5,6 +5,7 @@
 #include <iostream>
 #include <qabstractbutton.h>
 #include <qboxlayout.h>
+#include <qcombobox.h>
 #include <qdialog.h>
 #include <qlabel.h>
 #include <qlayoutitem.h>
@@ -597,8 +598,8 @@ void reloadMdem() {
 			if (res.value.lastTrainedAt == 0) {
 				trainedAt = 0;
 			} else {
-				// TODO: time_zone option
-				trainedAt = res.value.lastTrainedAt + 3600 * 2;
+				auto timezoneOffset = settings->value("timezone").toInt();
+				trainedAt = res.value.lastTrainedAt + 3600 * timezoneOffset;
 			}
 			std::cout << std::format("Last trained at: {}", trainedAt) << std::endl;
 
@@ -608,6 +609,10 @@ void reloadMdem() {
 		} else {
 			std::cout << std::format("Compilation error: {}", res.error) << std::endl;
 
+			for (auto question: res.value.questions) {
+				delete question;
+			}
+
 			// Show errors.
 			hMdemScroll->removeItem(mdemSpacer);
 			auto errorView = acquireError();
@@ -657,6 +662,9 @@ void pickDirectory(QString directory) {
 void setupEditorSave(bool checked) {
 	auto res = transpile(editor->text().toStdString(), true);
 	if (res.error.length() > 0) {
+		for (auto question: res.value.questions) {
+			delete question;
+		}
 		QMessageBox::information(
 			nullptr,
 			"Editing error",
@@ -787,7 +795,7 @@ int main(int argc, char *argv[]) {
 			[characterWrap, timezone, notRemembered, hard, medium, easy]() {
 			settings->setValue("characterWrap",  characterWrap->value());
 			settings->setValue("timezone",       timezone->value());
-			settings->setValue("notRemembered", notRemembered->value());
+			settings->setValue("notRemembered",  notRemembered->value());
 			settings->setValue("hard",           hard->value());
 			settings->setValue("medium",         medium->value());
 			settings->setValue("easy",           easy->value());
@@ -906,20 +914,22 @@ int main(int argc, char *argv[]) {
 	add = new QToolButton;
 	save = new QToolButton;
     load  = new QToolButton;
+	auto cbAlgorithm = new QComboBox;
     practice = new QToolButton;
 
     hTop->addWidget(add);
     hTop->addWidget(save);
     hTop->addWidget(load);
+    hTop->addWidget(cbAlgorithm);
     hTop->addWidget(practice);
-	QObject::connect(add, &QToolButton::clicked, []() {
-			// MARK1
-	});
 
     // Buttons
 	add->setText("Add");
     save->setText("Save");
     load->setText("Load");
+	cbAlgorithm->addItem("Primary", PRIMARY);
+	cbAlgorithm->addItem("Random",  RANDOM);
+	cbAlgorithm->addItem("Spaced",  SPACED);
 	practice->setText("Practice");
 
 	QObject::connect(add, &QToolButton::clicked, []() {
@@ -936,10 +946,13 @@ int main(int argc, char *argv[]) {
 	QObject::connect(
 		practice,
 		&QToolButton::clicked,
-		[](bool checked) {
+		[cbAlgorithm](bool checked) {
 			trainWindow->show();
 			trainWindow->resize(600, 300);
-			setQuestions(questions);
+			setQuestions(
+				questions,
+				static_cast<PracticeAlgorithm>(cbAlgorithm->currentData().toInt())
+			);
 		}
 	);
 

src/qtapp/trainWindow.cpp

@@ -235,12 +235,7 @@ std::vector<GroupView*> groupViews;
 std::default_random_engine  rng;
 std::vector<QStandardItem*> itemPool;
 
-/*QStandardItem *makeItem(std::string content, bool isCheckable) {*/
-/*	auto *item = new QStandardItem(); */
-/*	item->setText(QString::fromStdString(content));*/
-/*	item->setCheckable(isCheckable);*/
-/*	return item;*/
-/*};*/
+PracticeAlgorithm practiceAlgoritm;
 
 #define ITEM_POOL_CHUNK 200
 
@@ -422,7 +417,6 @@ void setupGroupQuestion(GroupQuestion *question) {
 		groupView->itemList.setModel(&groupView->itemModel);
 		groupView->itemList.setMaximumHeight(100);
 		groupView->itemList.setItemDelegate(itemDelegate);
-		/*groupView->itemScroll.setWidget(&groupView->itemScroll);*/
 		groupView->widget.setLayout(&groupView->vWidget);
 		groupView->widget.layout()->addWidget(&groupView->label);
 		groupView->widget.layout()->addWidget(&groupView->itemList);
@@ -517,7 +511,7 @@ void updatePaginationVisibility() {
 	}
 }
 
-void setQuestions(std::vector<Question*> questions) {
+void setQuestions(std::vector<Question*> questions, PracticeAlgorithm algorithm) {
 	trainQuestions = questions;
 	if (questions.size() <= 0) {
 		return;
@@ -525,6 +519,7 @@ void setQuestions(std::vector<Question*> questions) {
 	currentQuestionIndex = 0;
 	updatePaginationVisibility();
 	setupQuestion(trainQuestions[currentQuestionIndex]);
+	practiceAlgoritm = algorithm;
 }
 
 void initTrainWindow() {
@@ -642,11 +637,21 @@ void initTrainWindow() {
 
 		btnNext->setText("Next");
 		QObject::connect(btnNext, &QToolButton::clicked, []() {
-			currentQuestionIndex++;
-			if (currentQuestionIndex < trainQuestions.size()) {
-				setupQuestion(trainQuestions[currentQuestionIndex]);
+			switch (practiceAlgoritm) {
+				case PRIMARY:
+					currentQuestionIndex++;
+					if (currentQuestionIndex < trainQuestions.size()) {
+						setupQuestion(trainQuestions[currentQuestionIndex]);
+					}
+					updatePaginationVisibility();
+					break;
+				case RANDOM:
+					// TODO: implement
+					break;
+				case SPACED:
+					// TODO: implement
+					break;
 			}
-			updatePaginationVisibility();
 		});
 		questionBox->setObjectName("question-box");
 		actionButtons->setStyleSheet(QString(