Consider all thumbnailers for the information panel and tooltips

Summary:
The text thumbnail is really useful in tooltips, but disabled by default in
KIO. Having just a larger version of the placeholder icon from the theme
doesn't make a lot of sense, so try the best to get a proper preview.
Same applies to the information panel, which would otherwise just
show the same icon.

Test Plan:
Got textfile previews in tooltips and in the information panel even if
disabled.

Reviewers: #dolphin, elvisangelaccio, broulik, markg, ngraham

Reviewed By: #dolphin, broulik, ngraham

Subscribers: abetts, markg, kfm-devel, ngraham

Tags: #dolphin

Differential Revision: https://phabricator.kde.org/D15138

1 files changed, 4 insertions, 1 deletions

diff --git a/src/views/tooltips/tooltipmanager.cpp b/src/views/tooltips/tooltipmanager.cpp
index 19c87b084..bb2890138 100644
--- a/src/views/tooltips/tooltipmanager.cpp
+++ b/src/views/tooltips/tooltipmanager.cpp
@@ -129,7 +129,10 @@ void ToolTipManager::startContentRetrieval()
     // Request a preview of the item
     m_fileMetaDataWidget->setPreview(QPixmap());
 
-    KIO::PreviewJob* job = new KIO::PreviewJob(KFileItemList() << m_item, QSize(256, 256));
+    QStringList plugins = KIO::PreviewJob::availablePlugins();
+    KIO::PreviewJob* job = new KIO::PreviewJob(KFileItemList() << m_item,
+                                               QSize(256, 256),
+                                               &plugins);
     job->setIgnoreMaximumSize(m_item.isLocalFile());
     if (job->uiDelegate()) {
         KJobWidgets::setWindow(job, qApp->activeWindow());