maptool：

报错，没实现；

HPPA/MapToolPan.cpp

@@ -0,0 +1,61 @@
+#include "stdafx.h"
+#include "MapToolPan.h"
+#include "ImageViewer.h"
+#include <QMouseEvent>
+#include <QGraphicsView>
+
+MapToolPan::MapToolPan(Mapcavas* canvas, QObject* parent)
+    : MapTool(canvas, parent)
+{
+    setCursor(Qt::OpenHandCursor);
+}
+
+void MapToolPan::activate()
+{
+    MapTool::activate();
+    if (canvas())
+    {
+        canvas()->setDragMode(QGraphicsView::NoDrag);
+    }
+}
+
+void MapToolPan::deactivate()
+{
+    m_dragging = false;
+    MapTool::deactivate();
+}
+
+void MapToolPan::canvasMousePressEvent(QMouseEvent* e)
+{
+    if (e->button() == Qt::LeftButton)
+    {
+        m_dragging = true;
+        m_lastPos = e->pos();
+        if (canvas())
+        {
+            canvas()->viewport()->setCursor(Qt::ClosedHandCursor);
+        }
+    }
+}
+
+void MapToolPan::canvasMouseMoveEvent(QMouseEvent* e)
+{
+    if (m_dragging && canvas())
+    {
+        QPointF delta = canvas()->mapToScene(e->pos()) - canvas()->mapToScene(m_lastPos);
+        canvas()->translate(delta.x(), delta.y());
+        m_lastPos = e->pos();
+    }
+}
+
+void MapToolPan::canvasMouseReleaseEvent(QMouseEvent* e)
+{
+    if (e->button() == Qt::LeftButton)
+    {
+        m_dragging = false;
+        if (canvas())
+        {
+            canvas()->viewport()->setCursor(Qt::OpenHandCursor);
+        }
+    }
+}