Make it run with Qt6

This is a huge commit. Changes:
* Obviously, make it compile
* Make it run (only scarcely tested)
* get rid of most of clang's warnings

Let's see what surprises are in store...

1 files changed, 2 insertions, 2 deletions

diff --git a/viewer.cpp b/viewer.cpp
index 6a4f634..cba6314 100644
--- a/viewer.cpp
+++ b/viewer.cpp
@@ -56,7 +56,7 @@ void Viewer::preview(const QString &file){
     mCurIndex = -1;

     QPixmap pm = Helper::preview(file);

     mLabel->setPixmap(pm);

-    QString winTitle = QString(tr("%1 Viewer: [Preview %2]")).arg(qApp->applicationName()).arg(file);

+    QString winTitle = QString(tr("%1 Viewer: [Preview %2]")).arg(qApp->applicationName(), file);

     setWindowTitle(winTitle);

 }

 

@@ -96,6 +96,6 @@ void Viewer::displayFile(int index){
         pm = pm.scaled(QSize(width() - 20, height() - 20), Qt::KeepAspectRatio, Qt::SmoothTransformation);

     }

     mLabel->setPixmap(pm);

-    QString winTitle = QString(tr("%1 Viewer [%2]")).arg(qApp->applicationName()).arg(mFiles.at(mCurIndex));

+    QString winTitle = QString(tr("%1 Viewer [%2]")).arg(qApp->applicationName(), mFiles.at(mCurIndex));

     setWindowTitle(winTitle);

 }