Change table view font on Ctrl + Wheel combination

src/dlttableview.cpp

@@ -1,5 +1,8 @@
 #include "dlttableview.h"
 
+#include <QDebug>
+#include <QWheelEvent>
+
 DltTableView::DltTableView(QWidget *parent) :
     QTableView(parent)
 {
@@ -17,6 +20,15 @@ void DltTableView::paintEvent(QPaintEvent *event)
     }
 }
 
+void DltTableView::wheelEvent(QWheelEvent *event)
+{
+    if (event->modifiers().testFlag(Qt::ControlModifier)) {
+        auto val = event->angleDelta().y();
+        emit changeFontSize((0 < val) - (val < 0));
+        event->accept();
+    }
+}
+
 void DltTableView::lock()
 {
     paintMutex.lock();

src/dlttableview.h

@@ -17,11 +17,15 @@ class DltTableView : public QTableView
     explicit DltTableView(QWidget *parent = 0);
     void lock();
     void unlock();
+
+signals:
+    void changeFontSize(int delta);
 private:
     QMutex paintMutex;
 
 protected:
-    void paintEvent(QPaintEvent *e);
+    void paintEvent(QPaintEvent *e) override;
+    void wheelEvent(QWheelEvent *event) override;
 
 signals:
 

src/mainwindow.cpp

@@ -608,6 +608,15 @@ void MainWindow::initSignalConnections()
         ui->exploreView->scrollTo(
                     proxyModel->mapFromSource(fsModel->index(recentFiles[0])));
     });
+
+    connect(ui->tableView, &DltTableView::changeFontSize, this, [this](int direction){
+        QFont font;
+        font.fromString(settings->fontName);
+        int fontSize = font.pointSize() + direction;
+        font.setPointSize(fontSize);
+        settings->fontName = font.toString();
+        ui->tableView->setFont(font);
+    });
 }
 
 void MainWindow::initSearchTable()
@@ -2066,6 +2075,7 @@ void MainWindow::reloadLogFileFinishFilter()
         QList<int> list = dltIndexer->getGetLogInfoList();
         QDltMsg msg;
 
+        // FIXME: this is slow operation running in the main loop
         for(int num=0;num<list.size();num++)
         {
             if(qfile.getMsg(list[num],msg))
@@ -2082,7 +2092,6 @@ void MainWindow::reloadLogFileFinishFilter()
     // hide progress bar when finished
     statusProgressBar->reset();
     statusProgressBar->hide();
-
 }
 
 void MainWindow::reloadLogFileFinishDefaultFilter()

src/mainwindow.h

@@ -382,10 +382,10 @@ class MainWindow : public QMainWindow
     void writeDLTMessageToFile(QByteArray &bufferHeader,char*bufferPayload,quint32 bufferPayloadSize,EcuItem* ecuitem,quint32 sec=0,quint32 use=0);
 
 protected:
-    void keyPressEvent ( QKeyEvent * event );
-    void dragEnterEvent(QDragEnterEvent *event);
-    void dropEvent(QDropEvent *event);
-    void closeEvent(QCloseEvent *event);
+    void keyPressEvent ( QKeyEvent * event ) override;
+    void dragEnterEvent(QDragEnterEvent *event) override;
+    void dropEvent(QDropEvent *event) override;
+    void closeEvent(QCloseEvent *event) override;
 
 private slots:
     void reloadLogFileProgressMax(int num);