zoomedit:

* Use signals to inform RenderArea of view changes

10 files changed, 198 insertions, 145 deletions

diff --git a/src/Gui/RenderArea.cpp b/src/Gui/RenderArea.cpp
index b6686f5..41f76a6 100644
--- a/src/Gui/RenderArea.cpp
+++ b/src/Gui/RenderArea.cpp
@@ -52,35 +52,45 @@ RenderArea::RenderArea(BaseObjectType *cobject, const Glib::RefPtr<Gnome::Glade:
   gtk_widget_set_gl_capability(GTK_WIDGET(cobject), glconfig, 0, TRUE, GDK_GL_RGBA_TYPE);
 }
 
+void RenderArea::setView(View::View *view0) {
+  view = view0;
+  
+  if(viewUpdate)
+    viewUpdate.disconnect();
+  
+  if(view) {
+    viewUpdate = view->signalUpdate().connect(sigc::mem_fun(this, &RenderArea::queue_draw));
+    
+    if(is_realized()) {
+      if(!gdkGLBegin())
+        return;
+      
+      view->init();
+      view->resize(get_width(), get_height());
+      
+      gdkGLEnd();
+      
+      queue_draw();
+    }
+  }
+}
+
 void RenderArea::onRealize() {
   if(!gdkGLBegin())
     return;
   
-  glClearColor(0, 0, 0, 0);
-  
-  glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
-  glEnable(GL_BLEND);
-  
-  glEnable(GL_LINE_SMOOTH);
-  glEnable(GL_POINT_SMOOTH);
-  
-  glMatrixMode(GL_MODELVIEW);
-  glLoadIdentity();
+  if(view)
+    view->init();
   
   gdkGLEnd();
 }
 
-bool RenderArea::onConfigureEvent(GdkEventConfigure*) {
+bool RenderArea::onConfigureEvent(GdkEventConfigure *event) {
   if(!gdkGLBegin())
     return false;
   
-  glViewport(0, 0, get_width(), get_height());
-  
-  glMatrixMode(GL_PROJECTION);
-  glLoadIdentity();
-  
-  if(get_width() != 0 && get_height() != 0)
-    glScalef(2.0f/get_width(), -2.0f/get_height(), 1);
+  if(view)
+    view->resize(event->width, event->height);
   
   gdkGLEnd();
   
@@ -94,7 +104,7 @@ bool RenderArea::onExposeEvent(GdkEventExpose*) {
     return false;
   
   if(view)
-    view->render(this);
+    view->render();
   
   gdkSwapBuffers();
   gdkGLEnd();
@@ -106,10 +116,10 @@ bool RenderArea::onScrollEvent(GdkEventScroll *event) {
   if(view) {
     switch(event->direction) {
       case GDK_SCROLL_UP:
-        view->zoom(this, 1, event->x - get_width()/2, event->y - get_height()/2);
+        view->zoom(1, event->x - get_width()/2, event->y - get_height()/2);
         return true;
       case GDK_SCROLL_DOWN:
-        view->zoom(this, -1, event->x - get_width()/2, event->y - get_height()/2);
+        view->zoom(-1, event->x - get_width()/2, event->y - get_height()/2);
         return true;
       default:
         return false;
@@ -121,7 +131,7 @@ bool RenderArea::onScrollEvent(GdkEventScroll *event) {
 
 bool RenderArea::onButtonPressEvent(GdkEventButton *event) {
   if(view && event->button == 1)
-    view->click(this, event->x, event->y);
+    view->click(event->x, event->y);
   
   return true;
 }
@@ -150,7 +160,7 @@ bool RenderArea::onMotionNotifyEvent(GdkEventMotion *event) {
   }
   
   if(view)
-    view->move(this, xHover - event->x, yHover - event->y, event->state);
+    view->move(xHover - event->x, yHover - event->y, event->state);
   
   xHover = event->x;
   yHover = event->y;
diff --git a/src/Gui/RenderArea.h b/src/Gui/RenderArea.h
index 6aa66df..d42a352 100644
--- a/src/Gui/RenderArea.h
+++ b/src/Gui/RenderArea.h
@@ -38,21 +38,20 @@ class RenderArea : public Gtk::DrawingArea {
     RenderArea(BaseObjectType *cobject, const Glib::RefPtr<Gnome::Glade::Xml>&);
     
     View::View* getView() const {return view;}
-    void setView(View::View *view0) {
-      view = view0;
-      queue_draw();
-    }
+    void setView(View::View *view0);
     
   private:
     static GdkGLConfig *glconfig;
     
     View::View *view;
     
+    sigc::connection viewUpdate;
+    
     bool inWindow;
     gdouble xHover, yHover;
     
     void onRealize();
-    bool onConfigureEvent(GdkEventConfigure*);
+    bool onConfigureEvent(GdkEventConfigure *event);
     bool onExposeEvent(GdkEventExpose*);
     bool onScrollEvent(GdkEventScroll *event);
     bool onButtonPressEvent(GdkEventButton *event);
diff --git a/src/Gui/Window.cpp b/src/Gui/Window.cpp
index df20876..f33edf0 100644
--- a/src/Gui/Window.cpp
+++ b/src/Gui/Window.cpp
@@ -29,9 +29,6 @@ Window::Window(BaseObjectType *cobject, const Glib::RefPtr<Gnome::Glade::Xml> &x
   
   xml->get_widget_derived("RenderArea", renderArea);
   xml->get_widget_derived("MapArea", mapArea);
-  
-  if(renderArea)
-    renderArea->signal_expose_event().connect_notify(sigc::mem_fun(this, &Window::updateMap));
 }
 
 Window::~Window() {
@@ -42,10 +39,5 @@ Window::~Window() {
     delete mapArea;
 }
 
-void Window::updateMap(GdkEventExpose*) {
-  if(mapArea)
-    mapArea->queue_draw();
-}
-
 }
 }
diff --git a/src/Gui/Window.h b/src/Gui/Window.h
index 9b4f4ef..d2bd7aa 100644
--- a/src/Gui/Window.h
+++ b/src/Gui/Window.h
@@ -32,8 +32,6 @@ class Window : public Gtk::Window {
   private:
     RenderArea *renderArea, *mapArea;
     
-    void updateMap(GdkEventExpose*);
-    
   public:
     Window(BaseObjectType *cobject, const Glib::RefPtr<Gnome::Glade::Xml> &xml);
     virtual ~Window();
diff --git a/src/Instance.cpp b/src/Instance.cpp
index 29a912b..a6346ad 100644
--- a/src/Instance.cpp
+++ b/src/Instance.cpp
@@ -66,15 +66,15 @@ Instance::Instance(const Glib::ustring &file) : window(0), levelXml(0), level(0)
   view = new View::TopView();
   window->getRenderArea()->setView(view);
   
-  mapView = new View::MapView(window->getRenderArea());
+  mapView = new View::MapView(view);
   window->getMapArea()->setView(mapView);
   
   Gtk::ToolButton *button;
   xml->get_widget("ToolButtonZoomIn", button);
-  button->signal_clicked().connect(sigc::bind(sigc::mem_fun(view, &View::TopView::zoom), window->getRenderArea(), 2, 0, 0));
+  button->signal_clicked().connect(sigc::bind(sigc::mem_fun(view, &View::TopView::zoom), 2, 0, 0));
   
   xml->get_widget("ToolButtonZoomOut", button);
-  button->signal_clicked().connect(sigc::bind(sigc::mem_fun(view, &View::TopView::zoom), window->getRenderArea(), -2, 0, 0));
+  button->signal_clicked().connect(sigc::bind(sigc::mem_fun(view, &View::TopView::zoom), -2, 0, 0));
   
   if(file.empty())
     createLevel();
@@ -136,13 +136,11 @@ void Instance::createLevel() {
   level = new Data::Level(root);
   
   view->setLevel(level);
-  mapView->setLevel(level);
 }
 
 bool Instance::loadLevel(const Glib::ustring &file) {
   if(level) {
     view->setLevel(0);
-    mapView->setLevel(0);
     delete level;
     level = 0;
   }
@@ -162,7 +160,6 @@ bool Instance::loadLevel(const Glib::ustring &file) {
   level = new Data::Level(doc->get_root_node());
   
   view->setLevel(level);
-  mapView->setLevel(level);
   
   return true;
 }
diff --git a/src/View/MapView.cpp b/src/View/MapView.cpp
index 5727c86..1d074bc 100644
--- a/src/View/MapView.cpp
+++ b/src/View/MapView.cpp
@@ -30,22 +30,51 @@
 namespace ZoomEdit {
 namespace View {
 
-void MapView::zoom(Gui::RenderArea*, int zoom, float, float) {
-  if(!mainArea)
-    return;
+void MapView::setMainView(TopView *mainView0) {
+  mainView = mainView0;
   
-  TopView *mainView = dynamic_cast<TopView*>(mainArea->getView());
-  if(!mainView)
+  if(mainViewUpdate)
+    mainViewUpdate.disconnect();
+  
+  if(mainView)
+    mainViewUpdate = mainView->signalUpdate().connect(signalUpdate());
+}
+
+void MapView::init() {
+  glClearColor(0, 0, 0, 0);
+  
+  glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+  glEnable(GL_BLEND);
+  
+  glEnable(GL_LINE_SMOOTH);
+  glEnable(GL_POINT_SMOOTH);
+}
+
+void MapView::resize(float width, float height) {
+  if(width == viewWidth && height == viewHeight)
     return;
   
-  mainView->zoom(mainArea, zoom, 0, 0);
+  viewWidth = width; viewHeight = height;
+  
+  glViewport(0, 0, width, height);
+  
+  glMatrixMode(GL_PROJECTION);
+  glLoadIdentity();
+  
+  if(width != 0 && height != 0)
+    glScalef(2.0f/width, -2.0f/height, 1);
+  
+  signalUpdate().emit();
 }
 
-void MapView::move(Gui::RenderArea*, float x, float y, unsigned int state) {
-  if(!mainArea)
+void MapView::zoom(int zoom, float, float) {
+  if(!mainView)
     return;
   
-  TopView *mainView = dynamic_cast<TopView*>(mainArea->getView());
+  mainView->zoom(zoom, 0, 0);
+}
+
+void MapView::move(float x, float y, unsigned int state) {
   if(!mainView)
     return;
   
@@ -54,28 +83,20 @@ void MapView::move(Gui::RenderArea*, float x, float y, unsigned int state) {
   
   mainView->setXCenter(mainView->getXCenter() - x/scale);
   mainView->setYCenter(mainView->getYCenter() - y/scale);
-  
-  mainArea->queue_draw();
 }
 
-void MapView::click(Gui::RenderArea *renderArea, float x, float y) {
-  if(!mainArea)
-    return;
-  
-  TopView *mainView = dynamic_cast<TopView*>(mainArea->getView());
+void MapView::click(float x, float y) {
   if(!mainView)
     return;
   
-  mainView->setXCenter(xCenter + (x - renderArea->get_width()/2)/scale);
-  mainView->setYCenter(yCenter + (y - renderArea->get_height()/2)/scale);
-  
-  mainArea->queue_draw();
+  mainView->setXCenter(xCenter + (x - viewWidth/2)/scale);
+  mainView->setYCenter(yCenter + (y - viewHeight/2)/scale);
 }
 
-void MapView::render(Gui::RenderArea *renderArea) {
+void MapView::render() {
   glClear(GL_COLOR_BUFFER_BIT);
   
-  if(!level)
+  if(!mainView || !mainView->getLevel())
     return;
   
   float minX, maxX, minY, maxY;
@@ -87,7 +108,7 @@ void MapView::render(Gui::RenderArea *renderArea) {
   if(width == 0 || height == 0)
     return;
   
-  scale = std::min(renderArea->get_width()/width, renderArea->get_height()/height)*0.75f;
+  scale = std::min(viewWidth/width, viewHeight/height)*0.75f;
   
   glMatrixMode(GL_MODELVIEW);
   glPushMatrix();
@@ -95,44 +116,38 @@ void MapView::render(Gui::RenderArea *renderArea) {
   glScalef(scale, scale, 1);
   glTranslatef(-xCenter, -yCenter, 0);
   
-  const std::list<Data::Room*> &rooms = level->getRooms();
+  const std::list<Data::Room*> &rooms = mainView->getLevel()->getRooms();
   
   for(std::list<Data::Room*>::const_iterator room = rooms.begin(); room != rooms.end(); ++room)
     TopView::renderRoom(*room);
   
-  if(mainArea) {
-    TopView *mainView = dynamic_cast<TopView*>(mainArea->getView());
-    
-    if(mainView) {
-      float mainXCenter = mainView->getXCenter(), mainYCenter = mainView->getYCenter();
-      float mainScale = mainView->getScale();
-      
-      float mainWidth = mainArea->get_width()/mainScale, mainHeight = mainArea->get_height()/mainScale;
-      
-      glColor4f(0.7f, 0.7f, 0.7f, 0.3f);
-      
-      glBegin(GL_POLYGON);
-      
-      glVertex2f(mainXCenter-mainWidth/2, mainYCenter-mainHeight/2);
-      glVertex2f(mainXCenter+mainWidth/2, mainYCenter-mainHeight/2);
-      glVertex2f(mainXCenter+mainWidth/2, mainYCenter+mainHeight/2);
-      glVertex2f(mainXCenter-mainWidth/2, mainYCenter+mainHeight/2);
-      
-      glEnd();
-      
-      glColor4f(0.7f, 0.7f, 0.7f, 0.7f);
-      glLineWidth(1.0f);
-      
-      glBegin(GL_LINE_LOOP);
-      
-      glVertex2f(mainXCenter-mainWidth/2, mainYCenter-mainHeight/2);
-      glVertex2f(mainXCenter+mainWidth/2, mainYCenter-mainHeight/2);
-      glVertex2f(mainXCenter+mainWidth/2, mainYCenter+mainHeight/2);
-      glVertex2f(mainXCenter-mainWidth/2, mainYCenter+mainHeight/2);
-      
-      glEnd();
-    }
-  }
+  float mainXCenter = mainView->getXCenter(), mainYCenter = mainView->getYCenter();
+  float mainScale = mainView->getScale();
+  
+  float mainWidth = mainView->getWidth()/mainScale, mainHeight = mainView->getHeight()/mainScale;
+  
+  glColor4f(0.7f, 0.7f, 0.7f, 0.3f);
+  
+  glBegin(GL_POLYGON);
+  
+  glVertex2f(mainXCenter-mainWidth/2, mainYCenter-mainHeight/2);
+  glVertex2f(mainXCenter+mainWidth/2, mainYCenter-mainHeight/2);
+  glVertex2f(mainXCenter+mainWidth/2, mainYCenter+mainHeight/2);
+  glVertex2f(mainXCenter-mainWidth/2, mainYCenter+mainHeight/2);
+  
+  glEnd();
+  
+  glColor4f(0.7f, 0.7f, 0.7f, 0.7f);
+  glLineWidth(1.0f);
+  
+  glBegin(GL_LINE_LOOP);
+  
+  glVertex2f(mainXCenter-mainWidth/2, mainYCenter-mainHeight/2);
+  glVertex2f(mainXCenter+mainWidth/2, mainYCenter-mainHeight/2);
+  glVertex2f(mainXCenter+mainWidth/2, mainYCenter+mainHeight/2);
+  glVertex2f(mainXCenter-mainWidth/2, mainYCenter+mainHeight/2);
+  
+  glEnd();
   
   glMatrixMode(GL_MODELVIEW);
   glPopMatrix();
@@ -148,10 +163,10 @@ void MapView::getBounds(float *minX, float *maxX, float *minY, float *maxY) {
   if(maxY)
     *maxY = 0;
   
-  if(!level)
+  if(!mainView || !mainView->getLevel())
     return;
   
-  const std::list<Data::Room*> &rooms = level->getRooms();
+  const std::list<Data::Room*> &rooms = mainView->getLevel()->getRooms();
   
   for(std::list<Data::Room*>::const_iterator room = rooms.begin(); room != rooms.end(); ++room) {
     const std::list<Data::Triangle*> &triangles = (*room)->getFloorTriangles();
diff --git a/src/View/MapView.h b/src/View/MapView.h
index 2fb0df4..e34cae5 100644
--- a/src/View/MapView.h
+++ b/src/View/MapView.h
@@ -21,6 +21,7 @@
 #define ZOOMEDIT_VIEW_MAPVIEW_H_
 
 #include "View.h"
+#include <sigc++/connection.h>
 
 namespace ZoomEdit {
 
@@ -34,29 +35,33 @@ class TopView;
 
 class MapView : public View {
   private:
-    Data::Level *level;
+    sigc::connection mainViewUpdate;
     
-    Gui::RenderArea *mainArea;
+    float viewWidth, viewHeight;
+    
+    TopView *mainView;
     
     float scale, xCenter, yCenter;
     
     void getBounds(float *minX, float *maxX, float *minY, float *maxY);
     
   public:
-    MapView(Gui::RenderArea *mainArea0 = 0, Data::Level *level0 = 0)
-    : level(level0), mainArea(mainArea0), scale(1), xCenter(0), yCenter(0) {}
+    MapView(TopView *mainView0 = 0)
+    : mainView(0), scale(1), xCenter(0), yCenter(0) {
+      setMainView(mainView0);
+    }
     
-    Data::Level* getLevel() {return level;}
-    void setLevel(Data::Level *level0) {level = level0;}
+    TopView* getMainView() {return mainView;}
+    void setMainView(TopView *mainView0);
     
-    Gui::RenderArea* getMainArea() {return mainArea;}
-    void setMainArea(Gui::RenderArea *mainArea0) {mainArea = mainArea0;}
+    virtual void init();
+    virtual void resize(float width, float height);
     
-    virtual void zoom(Gui::RenderArea*, int zoom, float, float);
-    virtual void move(Gui::RenderArea*, float x, float y, unsigned int state);
-    virtual void click(Gui::RenderArea *renderArea, float x, float y);
+    virtual void render();
     
-    virtual void render(Gui::RenderArea *renderArea);
+    virtual void zoom(int zoom, float, float);
+    virtual void move(float x, float y, unsigned int state);
+    virtual void click(float x, float y);
 };
 
 }
diff --git a/src/View/TopView.cpp b/src/View/TopView.cpp
index 29fc242..9ce6039 100644
--- a/src/View/TopView.cpp
+++ b/src/View/TopView.cpp
@@ -58,12 +58,12 @@ bool TopView::Edge::operator<(const Edge &e) const {
   return false;
 }
 
-void TopView::drawGrid(Gui::RenderArea *renderArea) {
+void TopView::drawGrid() {
   float depth = 1.25f + 0.04f*zoomLevel;
   float depth2 = std::floor(depth);
   float step = std::pow(0.1f, depth2);
-  float width = renderArea->get_width()/scale;
-  float height = renderArea->get_height()/scale;
+  float width = viewWidth/scale;
+  float height = viewHeight/scale;
   
   float x1 = xCenter - width/2;
   float x2 = xCenter + width/2;
@@ -140,7 +140,34 @@ void TopView::renderRoom(Data::Room *room) {
   glEnd();
 }
 
-void TopView::zoom(Gui::RenderArea *renderArea, int zoom, float x, float y) {
+void TopView::init() {
+  glClearColor(0, 0, 0, 0);
+  
+  glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+  glEnable(GL_BLEND);
+  
+  glEnable(GL_LINE_SMOOTH);
+  glEnable(GL_POINT_SMOOTH);
+}
+
+void TopView::resize(float width, float height) {
+  if(width == viewWidth && height == viewHeight)
+    return;
+  
+  viewWidth = width; viewHeight = height;
+  
+  glViewport(0, 0, width, height);
+  
+  glMatrixMode(GL_PROJECTION);
+  glLoadIdentity();
+  
+  if(width != 0 && height != 0)
+    glScalef(2.0f/width, -2.0f/height, 1);
+  
+  signalUpdate().emit();
+}
+
+void TopView::zoom(int zoom, float x, float y) {
   const float oldScale = scale;
   
   zoomLevel = std::max(std::min(zoomLevel + zoom, 50), -100);
@@ -149,29 +176,29 @@ void TopView::zoom(Gui::RenderArea *renderArea, int zoom, float x, float y) {
   xCenter += x*(1/oldScale - 1/scale);
   yCenter += y*(1/oldScale - 1/scale);
   
-  renderArea->queue_draw();
+  signalUpdate().emit();
 }
 
-void TopView::move(Gui::RenderArea *renderArea, float x, float y, unsigned int state) {
+void TopView::move(float x, float y, unsigned int state) {
   if(!(state & GDK_BUTTON3_MASK))
     return;
   
   xCenter += x/scale;
   yCenter += y/scale;
   
-  renderArea->queue_draw();
+  signalUpdate().emit();
 }
 
-void TopView::render(Gui::RenderArea *renderArea) {
+void TopView::render() {
   glClear(GL_COLOR_BUFFER_BIT);
   
   glMatrixMode(GL_MODELVIEW);
-  glPushMatrix();
+  glLoadIdentity();
   
   glScalef(scale, scale, 1);
   glTranslatef(-xCenter, -yCenter, 0);
   
-  drawGrid(renderArea);
+  drawGrid();
   
   if(!level)
     return;
@@ -180,9 +207,6 @@ void TopView::render(Gui::RenderArea *renderArea) {
   
   for(std::list<Data::Room*>::const_iterator room = rooms.begin(); room != rooms.end(); ++room)
     renderRoom(*room);
-  
-  glMatrixMode(GL_MODELVIEW);
-  glPopMatrix();
 }
 
 }
diff --git a/src/View/TopView.h b/src/View/TopView.h
index 1fa81ad..abbb77b 100644
--- a/src/View/TopView.h
+++ b/src/View/TopView.h
@@ -45,30 +45,38 @@ class TopView : public View {
     
     Data::Level *level;
     
+    float viewWidth, viewHeight;
+    
     float xCenter, yCenter;
     
     int zoomLevel;
     float scale;
     
-    void drawGrid(Gui::RenderArea *renderArea);
+    void drawGrid();
     
   public:
-    TopView(Data::Level *level0 = 0) : level(level0), xCenter(0), yCenter(0), zoomLevel(0), scale(100) {}
+    TopView(Data::Level *level0 = 0) : level(level0), viewWidth(0), viewHeight(0), xCenter(0), yCenter(0), zoomLevel(0), scale(100) {}
+    
+    float getWidth() const {return viewWidth;}
+    float getHeight() const {return viewHeight;}
     
     float getXCenter() const {return xCenter;}
-    void setXCenter(float xCenter0) {xCenter = xCenter0;}
+    void setXCenter(float xCenter0) {xCenter = xCenter0; signalUpdate().emit();}
     float getYCenter() const {return yCenter;}
-    void setYCenter(float yCenter0) {yCenter = yCenter0;}
+    void setYCenter(float yCenter0) {yCenter = yCenter0; signalUpdate().emit();}
     
     float getScale() const {return scale;}
     
     Data::Level* getLevel() {return level;}
-    void setLevel(Data::Level *level0) {level = level0;}
+    void setLevel(Data::Level *level0) {level = level0; signalUpdate().emit();}
+    
+    virtual void init();
+    virtual void resize(float width, float height);
     
-    virtual void zoom(Gui::RenderArea *renderArea, int zoom, float x, float y);
-    virtual void move(Gui::RenderArea *renderArea, float x, float y, unsigned int state);
+    virtual void render();
     
-    virtual void render(Gui::RenderArea *renderArea);
+    virtual void zoom(int zoom, float x, float y);
+    virtual void move(float x, float y, unsigned int state);
     
     static void renderRoom(Data::Room *room);
 };
diff --git a/src/View/View.h b/src/View/View.h
index 446a4f6..56e2542 100644
--- a/src/View/View.h
+++ b/src/View/View.h
@@ -20,23 +20,28 @@
 #ifndef ZOOMEDIT_VIEW_VIEW_H_
 #define ZOOMEDIT_VIEW_VIEW_H_
 
-namespace ZoomEdit {
-
-namespace Gui {
-class RenderArea;
-}
+#include <sigc++/signal.h>
 
+namespace ZoomEdit {
 namespace View {
 
 class View {
+  private:
+    sigc::signal<void> update;
+    
   public:
     virtual ~View() {}
     
-    virtual void render(Gui::RenderArea *renderArea) = 0;
+    virtual void init() = 0;
+    virtual void resize(float width, float height) = 0;
+    
+    virtual void render() = 0;
+    
+    virtual void zoom(int, float, float) {}
+    virtual void move(float, float, unsigned int) {}
+    virtual void click(float, float) {}
     
-    virtual void zoom(Gui::RenderArea*, int, float, float) {}
-    virtual void move(Gui::RenderArea*, float, float, unsigned int) {}
-    virtual void click(Gui::RenderArea*, float, float) {}
+    sigc::signal<void> signalUpdate() const {return update;}
 };
 
 }