From 45f1021dbca3a4460204da636a7fcb43682c1350 Mon Sep 17 00:00:00 2001
From: GiWoong Kim <giwoong.kim@samsung.com>
Date: Thu, 7 May 2015 18:35:43 +0900
Subject: [PATCH] rotary: reduce rotary drawing frequency

Change-Id: Ifa6a21ca616cc53bbd298a42f7fc2a1494cff2d3
Signed-off-by: GiWoong Kim <giwoong.kim@samsung.com>
---
 tizen/src/ui/Makefile.objs  |  5 ++++-
 tizen/src/ui/rotaryview.cpp | 34 ++++++++++++++++++++++++++++------
 tizen/src/ui/rotaryview.h   |  7 +++++++
 3 files changed, 39 insertions(+), 7 deletions(-)

diff --git a/tizen/src/ui/Makefile.objs b/tizen/src/ui/Makefile.objs
index 1ca3f7c..88d4b26 100644
--- a/tizen/src/ui/Makefile.objs
+++ b/tizen/src/ui/Makefile.objs
@@ -12,7 +12,7 @@ obj-$(CONFIG_QT) += mainwindow.o moc_mainwindow.o
 obj-$(CONFIG_QT) += skinbezelitem.o
 obj-$(CONFIG_QT) += skinkeyitem.o moc_skinkeyitem.o
 obj-$(CONFIG_QT) += skinview.o
-obj-$(CONFIG_QT) += rotaryview.o
+obj-$(CONFIG_QT) += rotaryview.o moc_rotaryview.o
 obj-$(CONFIG_QT) += skinpainter.o
 obj-$(CONFIG_QT) += uiinformation.o
 obj-$(CONFIG_QT) += uistate.o
@@ -36,3 +36,6 @@ $(obj)/moc_mainwindow.cpp: $(obj)/mainwindow.h
 $(obj)/moc_skinkeyitem.o: $(obj)/moc_skinkeyitem.cpp
 $(obj)/moc_skinkeyitem.cpp: $(obj)/skinkeyitem.h
 	moc $< -o $@
+$(obj)/moc_rotaryview.o: $(obj)/moc_rotaryview.cpp
+$(obj)/moc_rotaryview.cpp: $(obj)/rotaryview.h
+	moc $< -o $@
diff --git a/tizen/src/ui/rotaryview.cpp b/tizen/src/ui/rotaryview.cpp
index e4596d5..96dcf91 100644
--- a/tizen/src/ui/rotaryview.cpp
+++ b/tizen/src/ui/rotaryview.cpp
@@ -32,6 +32,8 @@
 #include "rotaryview.h"
 #include "mainwindow.h"
 
+#define ROTARY_DRAWING_INTERVAL 100
+
 RotaryView::RotaryView(QWidget *parent) :
     QGraphicsView(new QGraphicsScene(parent), parent)
 {
@@ -40,6 +42,11 @@ RotaryView::RotaryView(QWidget *parent) :
     this->grabPos = QPoint(-1, -1);
     this->grabAngle = 0;
     this->rotaryDegree = 0;
+    this->lastTimestamp = 0;
+
+    timer = new QTimer(this);
+    timer->setSingleShot(true);
+    connect(timer, SIGNAL(timeout()), this, SLOT(rotateRotaryItem()));
 
     setStyleSheet("background-color: rgb(189, 189, 189); border-style: none");
     setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
@@ -78,6 +85,11 @@ void RotaryView::update()
     createItems();
 }
 
+void RotaryView::rotateRotaryItem()
+{
+    rotaryItem->setRotation(rotaryDegree);
+}
+
 /* override */
 void RotaryView::resizeEvent(QResizeEvent *event)
 {
@@ -128,6 +140,8 @@ void RotaryView::mouseReleaseEvent(QMouseEvent *event)
         grabAngle = 0;
     }
 
+    rotateRotaryItem();
+
     QGraphicsView::mouseReleaseEvent(event);
 }
 
@@ -143,15 +157,21 @@ void RotaryView::mouseMoveEvent(QMouseEvent *event)
         } else if (deltaAngle > 180) {
             deltaAngle -= 360; /* 0 -> 359 */
         }
-        qDebug() << "rotary delta :" << deltaAngle;
 
-        rotaryDegree += deltaAngle;
-
-        /* TODO: too many heavy calls over here
-        move to thread or paintEvent handler */
-        rotaryItem->setRotation(rotaryDegree);
+        /* convert to device event */
+        do_rotary_event(deltaAngle, 0);
 
+        rotaryDegree += deltaAngle;
         grabAngle = moveAngle;
+
+        /* drawing */
+        if ((event->timestamp() - lastTimestamp) > ROTARY_DRAWING_INTERVAL) {
+            timer->stop();
+            rotateRotaryItem();
+            lastTimestamp = event->timestamp();
+        } else {
+            timer->start(ROTARY_DRAWING_INTERVAL * 3);
+        }
     }
 
     QGraphicsView::mouseMoveEvent(event);
@@ -161,5 +181,7 @@ RotaryView::~RotaryView()
 {
     qDebug("destroy rotary view");
 
+    timer->stop();
+
     scene()->clear();
 }
diff --git a/tizen/src/ui/rotaryview.h b/tizen/src/ui/rotaryview.h
index 713b8e7..e5f0030 100644
--- a/tizen/src/ui/rotaryview.h
+++ b/tizen/src/ui/rotaryview.h
@@ -36,6 +36,8 @@ class MainWindow;
 
 class RotaryView : public QGraphicsView
 {
+    Q_OBJECT
+
 public:
     RotaryView(QWidget *parent);
     ~RotaryView();
@@ -62,6 +64,11 @@ private:
     int grabAngle;
     int rotaryDegree; /* absolute */
 
+    ulong lastTimestamp;
+    QTimer *timer;
+
+private slots:
+    void rotateRotaryItem();
 };
 
 #endif // ROTARYVIEW_H
-- 
2.7.4