Read JSON from ffprobe

Use JSON output from ffprobe instead of string parsing to get some kind
of type safety.

For doing that, some changes were needed in FileView: Use delegates for
displaying Duration and Bitrate instead of mangling output in
Qt::Displayrole.

To reuse code, move all delegates from the new Archive to a separate
file.

And, of course, the initial objective: Show the accumulated size and
duration of selected files in the status bar from the experimental
archive.

1 files changed, 86 insertions, 0 deletions

diff --git a/delegates.cpp b/delegates.cpp
new file mode 100644
index 0000000..ec1fe54
--- /dev/null
+++ b/delegates.cpp
@@ -0,0 +1,86 @@
+/*
+  This program is free software; you can redistribute it and/or
+  modify it under the terms of the GNU General Public License
+  as published by the Free Software Foundation; either version
+  2 of the License, or (at your option) any later version.
+*/
+
+#include <QVariant>
+#include <QSpinBox>
+
+#include "delegates.h"
+#include "helper.h"
+
+/* Delegate for File no. */
+
+QString FileNoDelegate::displayText(const QVariant &value, const QLocale &locale) const{
+    Q_UNUSED(locale);
+    int no = value.toInt();
+    if(no){
+        return QString::number(no);
+    }
+    return QString();
+}
+
+QWidget *FileNoDelegate::createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const{
+    Q_UNUSED(option);
+    QSpinBox *retval = new QSpinBox(parent);
+    int no = index.data().toInt();
+    retval->setValue(no);
+    return retval;
+}
+
+/* Delegate for Dvd no. */
+
+QString DvdNoDelegate::displayText(const QVariant &value, const QLocale &locale) const{
+    Q_UNUSED(locale);
+    int no = value.toInt();
+    if(no < 0){
+        return tr("(local)");
+    }
+    QString retval = QString(tr("#%1")).arg(QString::number(no));
+    return retval;
+}
+
+/* Delegate for size */
+
+QString SizeDelegate::displayText(const QVariant &value, const QLocale &locale) const{
+    // locale.toString() doesn't work, maybe b/c it's const
+    Q_UNUSED(locale);
+    QLocale l;
+    return l.toString(value.toLongLong());
+}
+
+/* Delegate for duration */
+
+QString DurationDelegate::displayText(const QVariant &value, const QLocale &locale) const{
+    Q_UNUSED(locale);
+    if(value.toString().contains("x")){
+        return value.toString();
+    }
+    qint64 secs = value.toInt();
+    if(secs == 0){
+        return tr("n/a");
+    }
+    Helper::Duration dur(secs);
+    return dur.toString();
+}
+
+/* Delegate for bitrate */
+
+QString BitrateDelegate::displayText(const QVariant &value, const QLocale &locale) const{
+    Q_UNUSED(locale);
+    int br = value.toInt() / 1000;
+    QString retval = QString("%1 kb/s").arg(QString::number(br));
+    return retval;
+}
+
+/* Empty delegate */
+
+QString EmptyDelegate::displayText(const QVariant &value, const QLocale &locale) const{
+    int i = value.toInt();
+    if(i < 1){
+        return QString();
+    }
+    return QStyledItemDelegate::displayText(value, locale);
+}