From e11ca3bba5059e56a52905f9086e0d5f152cca6a Mon Sep 17 00:00:00 2001
From: Gary Wang <wzc782970009@gmail.com>
Date: Fri, 4 Oct 2019 20:41:27 +0800
Subject: [PATCH] navigator view ready

---
 navigatorview.cpp | 28 +++++++++++++++++++++++++++-
 navigatorview.h   |  5 +++++
 2 files changed, 32 insertions(+), 1 deletion(-)

diff --git a/navigatorview.cpp b/navigatorview.cpp
index 9d01edf..fa8e51f 100644
--- a/navigatorview.cpp
+++ b/navigatorview.cpp
@@ -25,10 +25,36 @@ void NavigatorView::updateMainViewportRegion()
 {
     if (m_mainView != nullptr) {
         m_viewportRegion = mapFromScene(m_mainView->mapToScene(m_mainView->rect()));
-        qDebug() << m_mainView->rect() << m_mainView->mapToScene(m_mainView->rect()) << m_viewportRegion;
     }
 }
 
+void NavigatorView::mousePressEvent(QMouseEvent *event)
+{
+    m_mouseDown = true;
+
+    if (m_mainView) {
+        m_mainView->centerOn(mapToScene(event->pos()));
+    }
+
+    return QGraphicsView::mousePressEvent(event);
+}
+
+void NavigatorView::mouseMoveEvent(QMouseEvent *event)
+{
+    if (m_mouseDown && m_mainView) {
+        m_mainView->centerOn(mapToScene(event->pos()));
+    }
+
+    return QGraphicsView::mouseMoveEvent(event);
+}
+
+void NavigatorView::mouseReleaseEvent(QMouseEvent *event)
+{
+    m_mouseDown = false;
+
+    return QGraphicsView::mouseReleaseEvent(event);
+}
+
 void NavigatorView::wheelEvent(QWheelEvent *event)
 {
     event->ignore();
diff --git a/navigatorview.h b/navigatorview.h
index e082a06..163e1ab 100644
--- a/navigatorview.h
+++ b/navigatorview.h
@@ -16,9 +16,14 @@ public slots:
     void updateMainViewportRegion();
 
 private:
+    void mousePressEvent(QMouseEvent * event) override;
+    void mouseMoveEvent(QMouseEvent * event) override;
+    void mouseReleaseEvent(QMouseEvent * event) override;
+
     void wheelEvent(QWheelEvent *event) override;
     void paintEvent(QPaintEvent *event) override;
 
+    bool m_mouseDown = false;
     QPolygon m_viewportRegion;
     QGraphicsView *m_mainView = nullptr;
 };