Largest_empty_iso_rectangle: Improve Demo

GraphicsView/demo/Largest_empty_rect_2/Largest_empty_rectangle_2.cpp

@@ -98,6 +98,8 @@ public Q_SLOTS:
 
   void on_actionClear_triggered();
 
+  void on_actionOpen_triggered();
+
   void processInput(CGAL::Object);
 
   void on_actionRecenter_triggered();
@@ -105,7 +107,7 @@ public Q_SLOTS:
   void on_actionGeneratePointsInSquare_triggered();
   void on_actionGeneratePointsInDisc_triggered();
   void clear();
-
+  void open(QString fileName);
   void update_largest_empty_rectangle();
 
 Q_SIGNALS:
@@ -229,6 +231,50 @@ MainWindow::on_actionClear_triggered()
   Q_EMIT( changed());
 }
 
+void
+MainWindow::on_actionOpen_triggered()
+{
+  QString fileName = QFileDialog::getOpenFileName(this,
+                                                  tr("Open points file"),
+                                                  "."
+                                                  ,tr("xy files (*.xy)")
+                                                  );
+  if(! fileName.isEmpty()){
+    open(fileName);
+  }
+
+}
+
+void
+MainWindow::open(QString fileName)
+{
+  // wait cursor
+  QApplication::setOverrideCursor(Qt::WaitCursor);
+  std::ifstream ifs(qPrintable(fileName));
+
+  clear();
+
+  Point_2 p;
+  while(ifs >> p){
+    points.push_back(p);
+  }
+
+  CGAL::Bbox_2 bbox = CGAL::bbox_2(points.begin(), points.end());
+  square = Iso_rectangle_2(bbox);
+
+  ler = Largest_empty_iso_rectangle_2(square);
+  ler.insert(points.begin(), points.end());
+
+  frame[0]->setLine(convert(Segment_2(square.vertex(0),square.vertex(1))));
+  frame[1]->setLine(convert(Segment_2(square.vertex(1), square.vertex(2))));
+  frame[2]->setLine(convert(Segment_2(square.vertex(2), square.vertex(3))));
+  frame[3]->setLine(convert(Segment_2(square.vertex(3), square.vertex(0))));
+
+  QApplication::restoreOverrideCursor();
+  on_actionRecenter_triggered();
+  Q_EMIT( changed());
+}
+
 void
 MainWindow::on_actionRecenter_triggered()
 {

GraphicsView/demo/Largest_empty_rect_2/Largest_empty_rectangle_2.ui

@@ -80,7 +80,7 @@
      <x>0</x>
      <y>0</y>
      <width>500</width>
-     <height>26</height>
+     <height>22</height>
     </rect>
    </property>
    <widget class="QMenu" name="menuFile">
@@ -90,6 +90,7 @@
     <addaction name="separator"/>
     <addaction name="actionClear"/>
     <addaction name="separator"/>
+    <addaction name="actionOpen"/>
     <addaction name="actionQuit"/>
    </widget>
    <widget class="QMenu" name="menuTools">
@@ -199,6 +200,11 @@
     <string>Generate Segment Fans</string>
    </property>
   </action>
+  <action name="actionOpen">
+   <property name="text">
+    <string>Open</string>
+   </property>
+  </action>
  </widget>
  <resources>
   <include location="Largest_empty_rectangle_2.qrc"/>