custom file extensions

add also some more default c++ file extensions

mainwindow.cpp

 #include "mainwindow.h"
 #include "ui_mainwindow.h"
 #include <QFileDialog>
+#include <QInputDialog>
+
+static auto FILTERS = QStringList() << "*.cpp" << "*.cc" << "*.cxx" << "*.c++" << "*.c" << "*.tpp"
+                                    << "*.hpp" << "*.hh" << "*.hxx" << "*.h++" << "*.h" << "*.cl";
 
 static QStringList subDirs(const QDir &dir);
 
@@ -48,6 +52,33 @@ void MainWindow::on_pushButton_removeFirst_clicked()
     }
 }
 
+void MainWindow::on_pushButton_addExtension_clicked()
+{
+    bool ok;
+    auto text = QInputDialog::getText(this, "Insert file extension",
+                               "*.", QLineEdit::Normal, "txt", &ok);
+    if(ok) {
+        FILTERS << "*."+text;
+        emit updateFolderList();
+    }
+}
+
+void MainWindow::on_pushButton_removeFirstExtension_clicked()
+{
+    if(!FILTERS.isEmpty()) {
+        FILTERS.removeFirst();
+        emit updateFolderList();
+    }
+}
+
+void MainWindow::on_pushButton_removeLastExtension_clicked()
+{
+    if(!FILTERS.isEmpty()) {
+        FILTERS.removeLast();
+        emit updateFolderList();
+    }
+}
+
 void MainWindow::lines()
 {
     auto folderList = folders();
@@ -88,28 +119,29 @@ QStringList MainWindow::folders()
 
 void MainWindow::countLines(const QStringList &folders)
 {
-    auto filters = QStringList() << "*.cpp" << "*.h" << "*.cl";
     QString analysis("$$$$$ ANALYSIS $$$$$\n\n"
                      "located folders:\n" + folders.join("\n") + "\n\n" +
-                     "located files (" + filters.join(", ") + "):\n");
+                     "located files with extensions\n" + FILTERS.join(", ") + ":\n\n");
     QFile curFile;
     auto lineCounter = 0;
 
-    for(QDir curDir : folders)
-    {
-        auto fileList = curDir.entryList(filters);
-        for(const auto &fileN : fileList)
+    if(!FILTERS.isEmpty()) {
+        for(QDir curDir : folders)
         {
-            curFile.setFileName(curDir.path()+"/" +fileN);
-            curFile.open(QIODevice::ReadOnly | QIODevice::Text);
-            auto allLines = QString(curFile.readAll());
-            auto listOFLines = allLines.split("\n");
-            if(!ui->checkBox_emptyLines->isChecked())
-                listOFLines.removeAll("");
-            auto curLength = listOFLines.length();
-            analysis.append(fileN + ":  " + QString::number(curLength) + "\n");
-            lineCounter += curLength;
-            curFile.close();
+            auto fileList = curDir.entryList(FILTERS);
+            for(const auto &fileN : fileList)
+            {
+                curFile.setFileName(curDir.path()+"/" +fileN);
+                curFile.open(QIODevice::ReadOnly | QIODevice::Text);
+                auto allLines = QString(curFile.readAll());
+                auto listOFLines = allLines.split("\n");
+                if(!ui->checkBox_emptyLines->isChecked())
+                    listOFLines.removeAll("");
+                auto curLength = listOFLines.length();
+                analysis.append(fileN + ":  " + QString::number(curLength) + "\n");
+                lineCounter += curLength;
+                curFile.close();
+            }
         }
     }
     ui->textBrowser_analysis->setText(analysis);

mainwindow.h

@@ -19,6 +19,11 @@ private slots:
     void on_pushButton_addFolder_clicked();
     void on_pushButton_removeLast_clicked();
     void on_pushButton_removeFirst_clicked();
+
+    void on_pushButton_addExtension_clicked();
+    void on_pushButton_removeFirstExtension_clicked();
+    void on_pushButton_removeLastExtension_clicked();
+
 signals:
     void updateFolderList();
 private:

mainwindow.ui

@@ -61,6 +61,27 @@
         </property>
        </widget>
       </item>
+      <item>
+       <widget class="QPushButton" name="pushButton_addExtension">
+        <property name="text">
+         <string>add file extension</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QPushButton" name="pushButton_removeFirstExtension">
+        <property name="text">
+         <string>remove first extension</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QPushButton" name="pushButton_removeLastExtension">
+        <property name="text">
+         <string>remove last extension</string>
+        </property>
+       </widget>
+      </item>
       <item>
        <spacer name="verticalSpacer">
         <property name="orientation">