From 883b2f4ba313cd65c6c543ffbcea0bb6b084a6ad Mon Sep 17 00:00:00 2001
From: Aqua-sama <aqua@iserlohn-fortress.net>
Date: Fri, 5 Oct 2018 12:25:43 +0200
Subject: downloads: only show preview on images

---
 lib/downloads/widgets/downloaditemwidget.cpp | 46 ++++++++++++++++------------
 1 file changed, 27 insertions(+), 19 deletions(-)

diff --git a/lib/downloads/widgets/downloaditemwidget.cpp b/lib/downloads/widgets/downloaditemwidget.cpp
index e32db22..4096751 100644
--- a/lib/downloads/widgets/downloaditemwidget.cpp
+++ b/lib/downloads/widgets/downloaditemwidget.cpp
@@ -11,6 +11,7 @@
 #include <QStyle>
 #include <QUrl>
 #include <QDesktopServices>
+#include <QBuffer>
 
 inline QString sizeString(int size)
 {
@@ -120,25 +121,32 @@ void DownloadItemWidget::updateProgress(qint64 value, qint64 total)
 void DownloadItemWidget::updateFinished()
 {
     ui->progressBar->setValue(ui->progressBar->maximum());
-    QString tooltip = "<table>"
-                      "<tr>"
-                      "<th>Preview</th>"
-                      "<th>Information</th>"
-                      "</tr>"
-                      "<tr>"
-                      "<td>%1</td>"
-                      "<td>"
-                      "<p><b>URL</b>: %2</p>"
-                      "<p><b>Path</b>: %3</p>"
-                      "<p><b>MIME Type</b>: %4</p>"
-                      "<p><b>Size</b>: %5</p>"
-                      "</td>"
-                      "</tr>"
-                      "</table>";
-    if(item->mimeType().startsWith("image"))
-        tooltip = tooltip.arg("<img src='file://" + item->path() + "' width='400' alt='not available'>");
-    else
-        tooltip = tooltip.arg("not available");
+    ui->pause_toolButton->hide();
+    ui->abort_toolButton->hide();
+    ui->open_toolButton->show();
+
+    // generate a useful tooltip
+    QString tooltip = "<p><b>URL</b>: %1</p>"
+                      "<p><b>Path</b>: %2</p>"
+                      "<p><b>MIME Type</b>: %3</p>"
+                      "<p><b>Size</b>: %4</p>";
     tooltip = tooltip.arg(item->url().toString(), item->path(), item->mimeType(), sizeString(item->totalBytes()));
+
+    if(item->mimeType().startsWith("image")) {
+        const QPixmap pixmap(item->path());
+        const QPixmap thumbnail = pixmap.scaledToWidth(qMax(400, pixmap.width()), Qt::SmoothTransformation);
+
+        QByteArray imageData;
+        QBuffer buffer(&imageData);
+        thumbnail.save(&buffer, "PNG");
+
+        tooltip = QString("<table>"
+                          "<tr><th>Preview</th><th>Information</th></tr>"
+                          "<tr><td>%1</td><td>%2</td></tr>"
+                          "</table>").arg(QString("<img src='data:image/png;base64," + imageData.toBase64() + "' width='400' alt='preview'>"),
+                                          tooltip);
+
+    }
+
     setToolTip(tooltip);
 }
-- 
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