From 3f41327f3f5cca6ccfad091353964b389c3750d7 Mon Sep 17 00:00:00 2001
From: GiWoong Kim <giwoong.kim@samsung.com>
Date: Sat, 9 May 2015 12:20:37 +0900
Subject: [PATCH] touch: supports up to 2 touch points only on MT_SYMM mode

Change-Id: Ib00a8de81d82019aa23244bb27df9d386d397968
Signed-off-by: GiWoong Kim <giwoong.kim@samsung.com>
---
 tizen/src/ui/input/keyboardhelper.cpp    |  2 ++
 tizen/src/ui/input/multitouchtracker.cpp | 31 ++++++++++++++++++++++++++++---
 tizen/src/ui/input/multitouchtracker.h   |  5 ++++-
 tizen/src/ui/input/touchscreenhelper.cpp |  2 +-
 4 files changed, 35 insertions(+), 5 deletions(-)

diff --git a/tizen/src/ui/input/keyboardhelper.cpp b/tizen/src/ui/input/keyboardhelper.cpp
index 420dc2f..8696592 100644
--- a/tizen/src/ui/input/keyboardhelper.cpp
+++ b/tizen/src/ui/input/keyboardhelper.cpp
@@ -291,6 +291,8 @@ void KeyboardHelper::pressFilterMtChecking(QKeyEvent *event)
         if (event->modifiers() == (Qt::ControlModifier | Qt::AltModifier)) {
             qDebug() << "enable multi-touch mode : SYMM";
             set_multi_touch_enable(MultiTouchTracker::MT_SYMM);
+
+            mtTracker->leaveTouchPoint(MT_SYMM_MAX_POINT);
         }
 
         break;
diff --git a/tizen/src/ui/input/multitouchtracker.cpp b/tizen/src/ui/input/multitouchtracker.cpp
index f9db5a3..7bb6b49 100644
--- a/tizen/src/ui/input/multitouchtracker.cpp
+++ b/tizen/src/ui/input/multitouchtracker.cpp
@@ -142,6 +142,31 @@ TouchPoint *MultiTouchTracker::searchTouchPoint(int targetID)
     return NULL;
 }
 
+int MultiTouchTracker::leaveTouchPoint(int remainCnt)
+{
+    releaseGrabTouchPoint();
+
+    const int beforeCnt = touchPointList.count();
+    TouchPoint *point = NULL;
+
+    while (touchPointList.count() > remainCnt) {
+        point = touchPointList.last();
+        if (point != NULL) {
+            qDebug() << "ID" << point->getID() << "point releasing";
+
+            virtio_touchscreen_event(
+                point->getGuestPos().x(), point->getGuestPos().y(),
+                point->getID() - 1, 0);
+
+            delete point;
+        }
+
+        touchPointList.removeLast();
+    }
+
+    return beforeCnt - touchPointList.count();
+}
+
 void MultiTouchTracker::mtProcessing(int mode, QPoint hostPos, QPoint guestPos)
 {
     if (mode >= MT_OFF && mode < MT_MAX) {
@@ -316,7 +341,7 @@ void MultiTouchTracker::processingSymm(QPoint hostPos, QPoint guestPos)
     } else if ((point = searchTouchPoint(hostPos)) != NULL) { /* grab a touch */
         qDebug() << "ID" << point->getID() << "point is taken";
         grabTouchPoint = point;
-    } else if (touchCnt >= 2) { /* last touch */
+    } else if (touchCnt >= MT_SYMM_MAX_POINT) { /* last touch */
         /* supports up to 2 touch points */
         point = touchPointList.last();
         if (point != NULL) {
@@ -343,7 +368,7 @@ void MultiTouchTracker::processingSymm(QPoint hostPos, QPoint guestPos)
     }
 }
 
-void MultiTouchTracker::touchReleasing()
+void MultiTouchTracker::releaseGrabTouchPoint()
 {
     if (grabTouchPoint != NULL) {
         qDebug() << "ID" << grabTouchPoint->getID() << "point let go";
@@ -353,7 +378,7 @@ void MultiTouchTracker::touchReleasing()
 
 void MultiTouchTracker::finishTracking()
 {
-    touchReleasing();
+    releaseGrabTouchPoint();
 
     TouchPoint *point = NULL;
     for (int i = 0; i < touchPointList.count(); i++) {
diff --git a/tizen/src/ui/input/multitouchtracker.h b/tizen/src/ui/input/multitouchtracker.h
index 1d102c4..9437107 100644
--- a/tizen/src/ui/input/multitouchtracker.h
+++ b/tizen/src/ui/input/multitouchtracker.h
@@ -32,6 +32,8 @@
 
 class TouchScreenHelper;
 
+#define MT_SYMM_MAX_POINT (2)
+
 class TouchPoint
 {
 public:
@@ -61,7 +63,8 @@ public:
     int addTouchPoint(QPoint hostPos, QPoint guestPos);
     TouchPoint *searchTouchPoint(QPoint targetPos);
     TouchPoint *searchTouchPoint(int targetID);
-    void touchReleasing();
+    int leaveTouchPoint(int remainCnt);
+    void releaseGrabTouchPoint();
     void finishTracking();
 
     void mtProcessing(int mode, QPoint, QPoint);
diff --git a/tizen/src/ui/input/touchscreenhelper.cpp b/tizen/src/ui/input/touchscreenhelper.cpp
index 2415d8e..ab1b9a7 100644
--- a/tizen/src/ui/input/touchscreenhelper.cpp
+++ b/tizen/src/ui/input/touchscreenhelper.cpp
@@ -70,7 +70,7 @@ void TouchScreenHelper::mousePressed(QMouseEvent *event, QPoint guestPos)
 void TouchScreenHelper::mouseReleased(QMouseEvent *event, QPoint guestPos)
 {
     if (get_multi_touch_enable() != MultiTouchTracker::MT_OFF) {
-        mtTracker->touchReleasing();
+        mtTracker->releaseGrabTouchPoint();
         return;
     }
 
-- 
2.7.4