From 4c0c5a52458009b578a23d4abb4e726a13550c12 Mon Sep 17 00:00:00 2001
From: romibi <romibi@bluewin.ch>
Date: Sat, 11 Jun 2016 01:56:17 +0200
Subject: [PATCH] Enable Touch Scroll in Buffer-View

---
 src/uisupport/bufferview.cpp | 38 ++++++++++++++++++++++++++++++++++++
 src/uisupport/bufferview.h   |  5 +++++
 2 files changed, 43 insertions(+)

diff --git a/src/uisupport/bufferview.cpp b/src/uisupport/bufferview.cpp
index 0f80d0d8..3d45167d 100644
--- a/src/uisupport/bufferview.cpp
+++ b/src/uisupport/bufferview.cpp
@@ -28,6 +28,9 @@
 #include <QMenu>
 #include <QMessageBox>
 #include <QSet>
+#include <QTouchEvent>
+#include <QScrollBar>
+
 
 #include "action.h"
 #include "buffermodel.h"
@@ -84,6 +87,7 @@ void BufferView::init()
     setAcceptDrops(true);
     setDropIndicatorShown(true);
 #endif
+	setAttribute(Qt::WA_AcceptTouchEvents);
 
     setSortingEnabled(true);
     sortByColumn(0, Qt::AscendingOrder);
@@ -210,6 +214,40 @@ void BufferView::joinChannel(const QModelIndex &index)
     Client::userInput(bufferInfo, QString("/JOIN %1").arg(bufferInfo.bufferName()));
 }
 
+bool BufferView::event(QEvent *event) {
+	if (event->type() == QEvent::TouchBegin && _lastTouchStart < QDateTime::currentMSecsSinceEpoch() - 1000) { //(slow) double tab = normal behaviour = select multiple. 1000 ok?
+		_touchScrollInProgress = true;
+		_lastTouchStart = QDateTime::currentMSecsSinceEpoch();
+		setVerticalScrollMode(QAbstractItemView::ScrollPerPixel);
+		return true;
+	}
+
+	if (event->type() == QEvent::TouchUpdate && _touchScrollInProgress) {
+		QTouchEvent::TouchPoint p = ((QTouchEvent*)event)->touchPoints().at(0);
+		verticalScrollBar()->setValue(verticalScrollBar()->value() - (p.pos().y() - p.lastPos().y()));
+		return true;
+	}
+#if QT_VERSION >= 0x050000
+	if (event->type() == QEvent::TouchEnd || event->type() == QEvent::TouchCancel) {
+#else
+    if (event->type() == QEvent::TouchEnd) {
+#endif
+		_touchScrollInProgress = false;
+		return true;
+	}
+
+	return QTreeView::event(event);
+}
+
+void BufferView::mousePressEvent(QMouseEvent * event) {
+	if (!_touchScrollInProgress)
+		QTreeView::mousePressEvent(event);
+}
+
+void BufferView::mouseMoveEvent(QMouseEvent * event) {
+	if (!_touchScrollInProgress)
+		QTreeView::mouseMoveEvent(event);
+}
 
 void BufferView::keyPressEvent(QKeyEvent *event)
 {
diff --git a/src/uisupport/bufferview.h b/src/uisupport/bufferview.h
index 1f733cfb..aaafd615 100644
--- a/src/uisupport/bufferview.h
+++ b/src/uisupport/bufferview.h
@@ -79,6 +79,9 @@ protected:
     virtual QSize sizeHint() const;
     virtual void focusInEvent(QFocusEvent *event) { QAbstractScrollArea::focusInEvent(event); }
     virtual void contextMenuEvent(QContextMenuEvent *event);
+	virtual bool event(QEvent *event);
+	virtual void mouseMoveEvent(QMouseEvent *event);
+	virtual void mousePressEvent(QMouseEvent *event);
 
 #if QT_VERSION < 0x050000
     virtual void dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight);
@@ -100,6 +103,8 @@ private slots:
 
 private:
     QPointer<BufferViewConfig> _config;
+	qint64 _lastTouchStart = 0;
+	bool _touchScrollInProgress = false;
 
     enum ExpandedState {
         WasExpanded = 0x01,
-- 
2.20.1