Improve color generation performance

Colors are generated asynchronously now and the TimelineItem is
updated when the color generation finishes.  This allows the UI
to stay responsive while new colors are being generated.

1 files changed, 7 insertions, 0 deletions

diff --git a/src/timeline/TimelineItem.h b/src/timeline/TimelineItem.h
index f81aa658..7bf6a076 100644
--- a/src/timeline/TimelineItem.h
+++ b/src/timeline/TimelineItem.h
@@ -26,6 +26,8 @@
 #include <QSettings>
 #include <QTimer>
 
+#include <QtConcurrent>
+
 #include "AvatarProvider.h"
 #include "RoomInfoListItem.h"
 #include "Utils.h"
@@ -204,6 +206,8 @@ public:
                      const QString &room_id,
                      QWidget *parent);
 
+        ~TimelineItem();
+
         void setBackgroundColor(const QColor &color) { backgroundColor_ = color; }
         QColor backgroundColor() const { return backgroundColor_; }
 
@@ -229,6 +233,7 @@ signals:
 
 public slots:
         void refreshAuthorColor();
+        void finishedGeneratingColor();
 
 protected:
         void paintEvent(QPaintEvent *event) override;
@@ -264,6 +269,8 @@ private:
         //! has been acknowledged by the server.
         bool isReceived_ = false;
 
+        QFutureWatcher<QString> *colorGenerating_;
+
         QString replaceEmoji(const QString &body);
         QString event_id_;
         QString room_id_;