diff -u -x '*.o' -x 'moc_*' -x '*~' -x Makefile -x NanoMap nanomap-master_orig/downloadwidget.cpp nanomap-master/downloadwidget.cpp
--- nanomap-master_orig/downloadwidget.cpp	2010-07-29 16:24:38.000000000 +0400
+++ nanomap-master/downloadwidget.cpp	2010-09-04 00:05:14.000000000 +0400
@@ -26,6 +26,7 @@
 #include <QtCore/QFile>
 #include <QtGui/QLayout>
 #include <QtGui/QPushButton>
+#include <QtGui/QCheckBox>
 #include <QtNetwork/QNetworkReply>
 #include <QtNetwork/QNetworkRequest>
 
@@ -40,7 +41,8 @@
     m_right(new QLabel("E 0", this)),
     m_bottom(new QLabel("N 0", this)),
     m_levelSpinBox(new QSpinBox(this)),
-    m_dlProgress(new QProgressBar(this))
+    m_dlProgress(new QProgressBar(this)),
+    m_checkbox(new QCheckBox("S&kip already downloaded tiles", this))
 {
     QGridLayout *layout = new QGridLayout(this);
     layout->setContentsMargins(0, 0, 0, 0);
@@ -65,16 +67,19 @@
     m_levelSpinBox->setRange(0, 18);
     layout->addWidget(m_levelSpinBox, 3, 2, 1, 2);
 
+    m_checkbox->setChecked(false);
+    layout->addWidget(m_checkbox, 4, 0, 1, 0);
+
     m_dlProgress->setFormat("%v / %m");
-    layout->addWidget(m_dlProgress, 4, 0, 1, 4);
+    layout->addWidget(m_dlProgress, 5, 0, 1, 4);
 
     QPushButton *start = new QPushButton("&Start", this);
     connect(start, SIGNAL(clicked()), this, SLOT(startDownload()));
-    layout->addWidget(start, 5, 0, 1, 2);
+    layout->addWidget(start, 6, 0, 1, 2);
 
     QPushButton *back = new QPushButton("&Back", this);
     connect(back, SIGNAL(clicked()), this, SIGNAL(back()));
-    layout->addWidget(back, 5, 2, 1, 2);
+    layout->addWidget(back, 6, 2, 1, 2);
 
     connect(m_manager, SIGNAL(finished(QNetworkReply*)),
             this, SLOT(replyFinished(QNetworkReply*)));
@@ -145,9 +150,19 @@
             }
         }
         if (!m_dlList.isEmpty()) {
-            QUrl url(m_dlList.takeFirst());
-            m_manager->get(QNetworkRequest(url));
-        }
+	    int count = m_dlList.count();
+	    for (int i = 0; i < count; ++i) {
+            	QUrl url(m_dlList.takeFirst());
+	    	QFile file_my(QDir::homePath()+"/Maps/OSM"+url.path());
+	    	if (!file_my.exists() || m_checkbox->checkState() == Qt::Unchecked) {	    	    
+            	    	m_manager->get(QNetworkRequest(url));
+			break;
+	    	} else {
+			int n = m_dlProgress->value();
+			m_dlProgress->setValue(n+1);
+	    	}
+	    }
+	}
         int n = m_dlProgress->value();
         m_dlProgress->setValue(n+1);
     }
diff -u -x '*.o' -x 'moc_*' -x '*~' -x Makefile -x NanoMap nanomap-master_orig/downloadwidget.h nanomap-master/downloadwidget.h
--- nanomap-master_orig/downloadwidget.h	2010-07-29 16:24:38.000000000 +0400
+++ nanomap-master/downloadwidget.h	2010-09-03 23:29:57.000000000 +0400
@@ -24,6 +24,7 @@
 #include <QtGui/QProgressBar>
 #include <QtGui/QSpinBox>
 #include <QtGui/QWidget>
+#include <QtGui/QCheckBox>
 #include <QtNetwork/QNetworkAccessManager>
 
 class DownloadWidget : public QWidget
@@ -56,6 +57,7 @@
     QLabel *m_up, *m_left, *m_right, *m_bottom;
     QSpinBox *m_levelSpinBox;
     QProgressBar *m_dlProgress;
+    QCheckBox *m_checkbox;
 
 };