Buttons functionality

gridpreview.cpp

@@ -66,6 +66,15 @@ const QList<Line> &GridPreview::getLines() const
     return lines;
 }
 
+void GridPreview::clear()
+{
+    lines.clear();
+    width = 5;
+    height = 5;
+
+    emit updatedContents();
+}
+
 const Line &GridPreview::getLine(int index) const
 {
     return lines.at(index);

gridpreview.h

@@ -50,6 +50,8 @@ public:
     PointProbe& getCapturedProbe();
     const QList<Line>& getLines() const;
 
+    void clear();
+
     const QString toLuaTable();
     void paintEvent(QPaintEvent* event);
     const QColor colorFromString(const QString color);

mainwindow.cpp

@@ -90,3 +90,35 @@ bool MainWindow::isSelectedLineCorrect(int line)
     return line >= 0 && line < size && size > 0;
 }
 
+
+void MainWindow::on_buttonSave_clicked()
+{
+    QString fileName = QFileDialog::getSaveFileName(this, QString("Save grid"), ".", "Lua source code (*.lua)");
+    QFile file(fileName);
+    if (!file.open(QIODevice::WriteOnly | QIODevice::Text))
+        return;
+
+    QTextStream out(&file);
+    out << ui->gridPreview->toLuaTable();
+}
+
+
+void MainWindow::on_buttonClear_clicked()
+{
+    ui->gridPreview->clear();
+}
+
+
+void MainWindow::on_buttonDeleteLine_clicked()
+{
+    int selected = ui->listLines->currentRow();
+
+    if (!isSelectedLineCorrect(selected))
+        return;
+
+    ui->gridPreview->getCapturedProbe().ownerIndex = -1;
+    ui->gridPreview->removeLine(selected);
+
+    ui->listLines->clearSelection();
+}
+

mainwindow.h

@@ -2,6 +2,7 @@
 #define MAINWINDOW_H
 
 #include <QMainWindow>
+#include <QFileDialog>
 
 QT_BEGIN_NAMESPACE
 namespace Ui {
@@ -29,6 +30,12 @@ private slots:
     void on_comboLineColor_currentTextChanged(const QString &arg1);
     void on_listLines_currentRowChanged(int currentRow);
 
+    void on_buttonSave_clicked();
+
+    void on_buttonClear_clicked();
+
+    void on_buttonDeleteLine_clicked();
+
 private:
     Ui::MainWindow *ui;
     int lastEditedLine = -1;