From 29c7d46de1bb0703e51033ddcec34cb785d6f8c6 Mon Sep 17 00:00:00 2001
From: romibi <romibi@bluewin.ch>
Date: Wed, 17 Feb 2016 13:54:18 +0100
Subject: [PATCH] Enable Touch Scroll in Chat-View

---
 src/qtui/chatview.cpp | 20 +++++++++++++++++++-
 src/qtui/chatview.h   |  1 +
 2 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/src/qtui/chatview.cpp b/src/qtui/chatview.cpp
index 3ac00bb0..075238c1 100644
--- a/src/qtui/chatview.cpp
+++ b/src/qtui/chatview.cpp
@@ -59,6 +59,7 @@ void ChatView::init(MessageFilter *filter)
     _currentScaleFactor = 1;
     _invalidateFilter = false;
 
+    setAttribute(Qt::WA_AcceptTouchEvents);
     setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
     setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
     setAlignment(Qt::AlignLeft|Qt::AlignBottom);
@@ -108,7 +109,24 @@ bool ChatView::event(QEvent *event)
         }
     }
 
-    if (event->type() == QEvent::Wheel) {
+    if (event->type() == QEvent::TouchBegin && _lastTouchStart < QDateTime::currentMSecsSinceEpoch() - 1000) { //(slow) double tab = normal behaviour = select text. 1000 ok?
+        setDragMode(QGraphicsView::ScrollHandDrag);
+        setInteractive(false);
+        _lastTouchStart = QDateTime::currentMSecsSinceEpoch();
+        if (verticalScrollBar()->isVisible()) return true; //if scrollbar is not visible we need to request backlog below
+    }
+
+#if QT_VERSION >= 0x050000
+    if (event->type() == QEvent::TouchEnd || event->type() == QEvent::TouchCancel) {
+#else
+    if (event->type() == QEvent::TouchEnd) {
+#endif
+        setDragMode(QGraphicsView::NoDrag);
+        setInteractive(true);
+        return true;
+    }
+
+    if (event->type() == QEvent::Wheel || event->type() == QEvent::TouchBegin || event->type() == QEvent::TouchUpdate) {
         if (!verticalScrollBar()->isVisible()) {
             scene()->requestBacklog();
             return true;
diff --git a/src/qtui/chatview.h b/src/qtui/chatview.h
index 8629a50c..76cefd0d 100644
--- a/src/qtui/chatview.h
+++ b/src/qtui/chatview.h
@@ -117,6 +117,7 @@ private:
     int _scrollOffset;
     bool _invalidateFilter;
     QSet<ChatLine *> _linesWithCache;
+	qint64 _lastTouchStart = 0;
 };
 
 
-- 
2.20.1