Implement cache for FileWidget

Some data-gathering is quite expensive and requires a QProcess, like
getting the duration, so cache it in memory using QCache. Once the cache
is filled, the UI is much snappier.

This simplifies gatherData() a bit. It's still quite a long function,
but now it doesn't create the QStandardItems any more. I moved it to a
separate function.

1 files changed, 5 insertions, 0 deletions

diff --git a/filewidget.h b/filewidget.h
index b4c94e3..9c466fa 100644
--- a/filewidget.h
+++ b/filewidget.h
@@ -9,6 +9,7 @@
 #include <QToolBar>
 #include <QFileInfo>
 #include <QLineEdit>
+#include <QCache>
 
 class QLineEdit;
 class QStandardItemModel;
@@ -23,6 +24,8 @@ class OriginDialog;
 class QMenu;
 class FileCopier;
 class ProgressDialog;
+class CachedFileData;
+class QStandardItem;
 
 class FileWidget : public QWidget {
     Q_OBJECT
@@ -86,6 +89,7 @@ class FileWidget : public QWidget {
         void readSettings();
         void writeSettings();
         void cutOrCopy();
+        QList<QStandardItem*> constructRow(CachedFileData *fd) const;
         QAction *createSeparator();
         QLineEdit *mDir;
         QLineEdit *mFilter;
@@ -117,6 +121,7 @@ class FileWidget : public QWidget {
         VideoSorter *mProxy;
         OriginDialog *mOrignDlg;
         FileCopier *mFileCopier;
+        QCache<QString, CachedFileData> mFileCache;
         int mFileAction;
 };