Improve Touch support

With this patch dolphin now supports the following touch gestures:

* Tap gesture to interact/open with directories, files and so on
* TapAndHold and release gesture for access to the context menu (main window, panel folder, places and information)
* TapAndHold and moving gesture for drag and drop action (main windows, panel folder and places)
* pinch gesture for zoom in main window
* kinetic scrolling (QScroller) for main window, panel folder, panel places, panel information, setting preview and service
* two fingers swipe gesture to left, right and up as shortcut to navigate back, forward and up
* two finger tap gesture to toggle item selection, similar to Ctrl and left mouse click

FEATURE: 385066
FIXED-IN: 20.11.80

 You are currently rebasing branch 'touch' on '85241a924'.

1 files changed, 48 insertions, 0 deletions

diff --git a/src/kitemviews/private/ktwofingertap.h b/src/kitemviews/private/ktwofingertap.h
new file mode 100644
index 000000000..614df2424
--- /dev/null
+++ b/src/kitemviews/private/ktwofingertap.h
@@ -0,0 +1,48 @@
+/*
+ * SPDX-FileCopyrightText: 2020 Steffen Hartleib <[email protected]>
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#ifndef KTWOFINGERTAP_H
+#define KTWOFINGERTAP_H
+
+#include <dolphin_export.h>
+// Qt
+#include <QGesture>
+#include <QGestureRecognizer>
+
+class DOLPHIN_EXPORT KTwoFingerTap : public QGesture
+{
+    Q_OBJECT
+    Q_PROPERTY(QPointF pos READ pos WRITE setPos)
+    Q_PROPERTY(QPointF screenPos READ screenPos WRITE setScreenPos)
+    Q_PROPERTY(QPointF scenePos READ scenePos WRITE setScenePos)
+public:
+    explicit KTwoFingerTap(QObject* parent = nullptr);
+    ~KTwoFingerTap();
+    QPointF pos() const;
+    void setPos(QPointF pos);
+    QPointF screenPos() const;
+    void setScreenPos(QPointF screenPos);
+    QPointF scenePos() const;
+    void setScenePos(QPointF scenePos);
+private:
+    QPointF m_pos;
+    QPointF m_screenPos;
+    QPointF m_scenePos;
+};
+
+class DOLPHIN_EXPORT KTwoFingerTapRecognizer : public QGestureRecognizer
+{
+public:
+    explicit KTwoFingerTapRecognizer();
+    ~KTwoFingerTapRecognizer();
+    QGesture* create(QObject*) override; 
+    Result recognize(QGesture*, QObject*, QEvent*) override;
+private:
+    Q_DISABLE_COPY(KTwoFingerTapRecognizer)
+    bool m_gestureTriggered;
+};
+
+#endif /* KTWOFINGERTAP_H */