Merge pull request #5042 from maxGimeno/Viewer-Zoom_to_rectangle

Viewer zoom to rectangle

GraphicsView/include/CGAL/Qt/camera_impl.h

@@ -895,13 +895,17 @@ Vec Camera::pointUnderPixel(const QPoint &pixel, bool &found) const {
 
 /*! Moves the Camera so that the entire scene is visible.
 
- Simply calls fitSphere() on a sphere defined by sceneCenter() and
- sceneRadius().
+ Calls fitSphere() on a sphere defined by sceneCenter() and
+ sceneRadius(), and resets the default FOV.
 
  You will typically use this method in CGAL::QGLViewer::init() after you defined a new
  sceneRadius(). */
 CGAL_INLINE_FUNCTION
-void Camera::showEntireScene() { fitSphere(sceneCenter(), sceneRadius()); }
+void Camera::showEntireScene()
+{
+  setFieldOfView(CGAL_PI/4.0);
+  fitSphere(sceneCenter(), sceneRadius());
+}
 
 /*! Moves the Camera so that its sceneCenter() is projected on the center of the
  window. The orientation() and fieldOfView() are unchanged.
@@ -2115,7 +2119,7 @@ void Camera::initFromDOMElement(const QDomElement &element) {
   while (!child.isNull()) {
     if (child.tagName() == "Parameters") {
       // #CONNECTION# Default values set in constructor
-      setFieldOfView(DomUtils::qrealFromDom(child, "fieldOfView", CGAL_PI / 4.0));
+      //setFieldOfView(DomUtils::qrealFromDom(child, "fieldOfView", CGAL_PI / 4.0));
       setZNearCoefficient(
           DomUtils::qrealFromDom(child, "zNearCoefficient", 0.005));
       setZClippingCoefficient(

GraphicsView/include/CGAL/Qt/manipulatedCameraFrame_impl.h

@@ -371,8 +371,7 @@ void ManipulatedCameraFrame::mouseMoveEvent(QMouseEvent *const event,
     break;
   }
 
-  case ZOOM_ON_REGION:
-  case NO_MOUSE_ACTION:
+  default:
     break;
   }
 
@@ -424,6 +423,23 @@ void ManipulatedCameraFrame::wheelEvent(QWheelEvent *const event,
         inverseTransformOf(Vec(0.0, 0.0, 0.2 * flySpeed() * event->angleDelta().y())));
     Q_EMIT manipulated();
     break;
+  case ZOOM_FOV:
+  {
+    qreal delta = - wheelDelta(event);//- sign to keep the same behavior as for the ZOOM action.
+    qreal new_fov = delta/100 + camera->fieldOfView();
+    if(new_fov > CGAL_PI/180.0)
+    {
+      new_fov = delta + camera->fieldOfView();
+    }
+    if(new_fov > CGAL_PI/4.0)
+      new_fov = CGAL_PI/4.0;
+    if( new_fov >= 0.0)
+    {
+      camera->setFieldOfView(new_fov);
+    }
+    Q_EMIT manipulated();
+    break;
+  }
   default:
     break;
   }
@@ -447,7 +463,10 @@ void ManipulatedCameraFrame::wheelEvent(QWheelEvent *const event,
   // isManipulated() returns false. But then fastDraw would not be used with
   // wheel. Detecting the last wheel event and forcing a final draw() is done
   // using the timer_.
-  action_ = NO_MOUSE_ACTION;
+  if(action_ != ZOOM_FOV)
+    action_ = NO_MOUSE_ACTION;
+  //else done after postDraw().
+
 }
 
 ////////////////////////////////////////////////////////////////////////////////

GraphicsView/include/CGAL/Qt/manipulatedFrame_impl.h

@@ -458,7 +458,7 @@ void ManipulatedFrame::mouseMoveEvent(QMouseEvent *const event,
     // These MouseAction values make no sense for a manipulatedFrame
     break;
 
-  case NO_MOUSE_ACTION:
+  default:
     // Possible when the ManipulatedFrame is a MouseGrabber. This method is then
     // called without startAction because of mouseTracking.
     break;

GraphicsView/include/CGAL/Qt/qglviewer_impl.h

@@ -598,6 +598,33 @@ void CGAL::QGLViewer::postDraw() {
   if (displayMessage_)
     drawText(10, height() - 10, message_);
 
+  //zoom region
+  if(camera()->frame()->action_ == qglviewer::ZOOM_ON_REGION)
+  {
+    QPainter painter(this);
+    painter.setPen(QColor(120,120,120));
+    painter.drawRect(QRect(camera()->frame()->pressPos_, mapFromGlobal(QCursor::pos())));
+    painter.end();
+  }
+
+  //zoom_fov indicator
+  if(camera()->frame()->action_ == qglviewer::ZOOM_FOV)
+  {
+    QPainter painter(this);
+    QPoint bot(width()-30,height()/2-0.33*height()),
+           top(width()-30, height()/2+0.33*height());
+    int fov_height = (top.y()-bot.y())*camera()->fieldOfView()*4.0/CGAL_PI + bot.y();
+
+
+    painter.setPen(QColor(120,120,120));
+    painter.drawLine(bot, top);
+    painter.fillRect(QRect(QPoint(width()-40, fov_height+10),
+                           QPoint(width()-20, fov_height-10)),
+                     QColor(120,120,120));
+    painter.end();
+    camera()->frame()->action_= qglviewer::NO_MOUSE_ACTION;
+  }
+
 }
 
 
@@ -732,6 +759,7 @@ void CGAL::QGLViewer::setDefaultMouseBindings() {
 
     setWheelBinding(modifiers, mh, qglviewer::ZOOM);
   }
+  setWheelBinding(::Qt::Key_Z, ::Qt::NoModifier, qglviewer::CAMERA, qglviewer::ZOOM_FOV);
 
   // Z o o m   o n   r e g i o n
   setMouseBinding(::Qt::ShiftModifier, ::Qt::MidButton, qglviewer::CAMERA, qglviewer::ZOOM_ON_REGION);
@@ -753,6 +781,7 @@ void CGAL::QGLViewer::setDefaultMouseBindings() {
   setMouseBinding(::Qt::Key_Z, ::Qt::NoModifier, ::Qt::LeftButton, qglviewer::ZOOM_ON_PIXEL);
   setMouseBinding(::Qt::Key_Z, ::Qt::NoModifier, ::Qt::RightButton, qglviewer::ZOOM_TO_FIT);
 
+
 #ifdef Q_OS_MAC
   // Specific Mac bindings for touchpads. Two fingers emulate a wheelEvent which
   // zooms. There is no right button available : make Option key + left emulate
@@ -1636,6 +1665,8 @@ QString CGAL::QGLViewer::mouseActionString(qglviewer::MouseAction ma) {
                          "SCREEN_TRANSLATE mouse action");
   case CGAL::qglviewer::ZOOM_ON_REGION:
     return CGAL::QGLViewer::tr("Zooms on region for", "ZOOM_ON_REGION mouse action");
+  case CGAL::qglviewer::ZOOM_FOV:
+    return CGAL::QGLViewer::tr("Changes the FOV to emulate an optical zoom for ", "ZOOM_FOV mouse action");
   }
   return QString();
 }
@@ -2722,14 +2753,16 @@ void CGAL::QGLViewer::setWheelBinding(::Qt::Key key, ::Qt::KeyboardModifiers mod
                                 bool withConstraint) {
   //#CONNECTION# ManipulatedFrame::wheelEvent and
   // ManipulatedCameraFrame::wheelEvent switches
-  if ((action != qglviewer::ZOOM) && (action != qglviewer::MOVE_FORWARD) &&
-      (action != qglviewer::MOVE_BACKWARD) && (action != qglviewer::NO_MOUSE_ACTION)) {
+  if ((action != qglviewer::ZOOM) && (action != qglviewer::ZOOM_FOV) &&
+      (action != qglviewer::MOVE_FORWARD) && (action != qglviewer::MOVE_BACKWARD)
+      && (action != qglviewer::NO_MOUSE_ACTION)) {
     qWarning("Cannot bind %s to wheel",
              mouseActionString(action).toLatin1().constData());
     return;
   }
 
-  if ((handler == qglviewer::FRAME) && (action != qglviewer::ZOOM) && (action != qglviewer::NO_MOUSE_ACTION)) {
+  if ((handler == qglviewer::FRAME) && (action != qglviewer::ZOOM)
+      && (action != qglviewer::NO_MOUSE_ACTION)) {
     qWarning("Cannot bind %s to FRAME wheel",
              mouseActionString(action).toLatin1().constData());
     return;

GraphicsView/include/CGAL/Qt/viewer_actions.h

@@ -79,7 +79,8 @@ enum MouseAction {
   ROLL,
   DRIVE,
   SCREEN_TRANSLATE,
-  ZOOM_ON_REGION
+  ZOOM_ON_REGION,
+  ZOOM_FOV
 };
 
 enum SnapShotBackground {