ClickLabel: rename clicked to leftClicked and only fire when left mouse button clicked

gui/clicklabel.cpp

@@ -1,6 +1,11 @@
+#include <QMouseEvent>
 #include "clicklabel.h"
 
 void ClickLabel::mousePressEvent(QMouseEvent *event)
 {
-    emit clicked();
+    if(event->button() == Qt::LeftButton)
+    {
+        emit leftClick();
+    }
+    return QLabel::mousePressEvent(event);
 }

gui/clicklabel.h

@@ -8,7 +8,7 @@ class ClickLabel : public QLabel
 public:
     using QLabel::QLabel;
 signals:
-    void clicked();
+    void leftClick();
 protected:
         void mousePressEvent(QMouseEvent *event);
 

gui/mainwindow.cpp

@@ -118,7 +118,7 @@ void MainWindow::pdfPreviewReceived(PdfPreview preview)
     label->setPixmap(QPixmap::fromImage(preview.previewImage));
     label->setToolTip(preview.documentPath);
     ui->scrollAreaWidgetContents->layout()->addWidget(label);
-    connect(label, &ClickLabel::clicked, [=]() {
+    connect(label, &ClickLabel::leftClick, [=]() {
         QSettings settings;
         QString command = settings.value("pdfviewer").toString();
         if(command != "" && command.contains("%p") && command.contains("%f"))