From d7b57a6fd0f4d97799f9ebdc6cdec4a0703d1ca8 Mon Sep 17 00:00:00 2001
From: goldenhawking <goldenhawking@163.com>
Date: Fri, 5 Feb 2016 22:21:07 +0800
Subject: [PATCH] Change the "goto center" mouse key from right click to left
 double click.

---
 qtviewer_planetosm/osmtiles/layer_tiles.cpp | 23 ++++++++++++++-------
 qtviewer_planetosm/osmtiles/layer_tiles.h   |  1 +
 2 files changed, 16 insertions(+), 8 deletions(-)

diff --git a/qtviewer_planetosm/osmtiles/layer_tiles.cpp b/qtviewer_planetosm/osmtiles/layer_tiles.cpp
index f279485..0384f12 100644
--- a/qtviewer_planetosm/osmtiles/layer_tiles.cpp
+++ b/qtviewer_planetosm/osmtiles/layer_tiles.cpp
@@ -135,14 +135,7 @@ namespace QTVOSM{
 		{
 			this->m_nStartPosX = event->pos().x();
 			this->m_nStartPosY = event->pos().y();
-		}
-		else if (event->button()==Qt::RightButton)
-		{
-			int nOffsetX = event->pos().x()-m_pViewer->windowWidth()/2;
-			int nOffsetY = event->pos().y()-m_pViewer->windowHeight()/2;
-			m_pViewer->DragView(-nOffsetX,-nOffsetY);
-			res = true;
-		}
+		}		
 		return res;
 	}
 
@@ -164,6 +157,20 @@ namespace QTVOSM{
 		return res;
 	}
 
+	bool layer_tiles::cb_mouseDoubleClickEvent( QMouseEvent * event )
+	{
+		if (!m_pViewer || m_bVisible==false || m_bActive==false) return false;
+		bool res = false;
+		if (event->button()==Qt::LeftButton)
+		{
+			int nOffsetX = event->pos().x()-m_pViewer->windowWidth()/2;
+			int nOffsetY = event->pos().y()-m_pViewer->windowHeight()/2;
+			m_pViewer->DragView(-nOffsetX,-nOffsetY);
+			res = true;
+		}
+		return res;
+	}
+
 	bool layer_tiles::cb_mouseMoveEvent(QMouseEvent * /*event*/)
 	{
 		return false;
diff --git a/qtviewer_planetosm/osmtiles/layer_tiles.h b/qtviewer_planetosm/osmtiles/layer_tiles.h
index f3c375a..f30c0d9 100644
--- a/qtviewer_planetosm/osmtiles/layer_tiles.h
+++ b/qtviewer_planetosm/osmtiles/layer_tiles.h
@@ -38,6 +38,7 @@ namespace QTVOSM{
 		virtual bool cb_mousePressEvent ( QMouseEvent * event );
 		virtual bool cb_mouseReleaseEvent ( QMouseEvent * event );
 		virtual bool cb_mouseMoveEvent(QMouseEvent * event);
+		virtual bool cb_mouseDoubleClickEvent(QMouseEvent *);
 		virtual bool cb_wheelEvent ( QWheelEvent * event );
 		virtual void cb_resizeEvent ( QResizeEvent * event);
 		virtual void cb_levelChanged(int nLevel);
-- 
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