Le puse el icono de lo que se esta drageando cuando se draguea... Va tomando forma...

diff --git a/tests/GUI/dndwindow.cc b/tests/GUI/dndwindow.cc
index fea04dcefea2dabab8da87f04bd179f9190fe988..e3652080302741d2d365a11e577be4154954a172 100644 (file)
--- a/tests/GUI/dndwindow.cc
+++ b/tests/GUI/dndwindow.cc
@@ -48,7 +48,10 @@ DnDWindow::DnDWindow()
   m_Button_Canio.signal_drag_data_get().connect( SigC::slot(*this, &DnDWindow::on_canio_drag_data_get));
        m_Button_Y.signal_drag_data_get().connect( SigC::slot(*this, &DnDWindow::on_y_drag_data_get));
        m_Button_Codo.signal_drag_data_get().connect( SigC::slot(*this, &DnDWindow::on_codo_drag_data_get));
-
+  // Señales para cambiar el icono cuando empieza el drag.
+  m_Button_Canio.signal_drag_begin().connect( SigC::slot(*this, &DnDWindow::on_canio_drag_begin));
+  m_Button_Y.signal_drag_begin().connect( SigC::slot(*this, &DnDWindow::on_y_drag_begin));
+  m_Button_Codo.signal_drag_begin().connect( SigC::slot(*this, &DnDWindow::on_codo_drag_begin));
 
   m_VBox.pack_start(m_Button_Canio);
        m_VBox.pack_start(m_Button_Y);
@@ -78,10 +81,14 @@ void DnDWindow::on_item_button_down()
 }
 
 
-void DnDWindow::on_canio_drag_data_get(const Glib::RefPtr<Gdk::DragContext>&, GtkSelectionData* selection_data, guint, guint)
+void DnDWindow::on_canio_drag_data_get(const Glib::RefPtr<Gdk::DragContext>& context, GtkSelectionData* selection_data, guint, guint)
 {
   //TODO: The gtkmm API needs to change to use a Gtk::SelectionData instead of a GtkSelectionData.
   //That should happen for gtkmm 2.4.
+       Glib::RefPtr<Gdk::Pixbuf> image;
+       image = Gdk::Pixbuf::create_from_file("canio.png");
+       // Cambio el icono de DND seteando el "hot spot" en el centro.
+       context->set_icon(image, image->get_width() / 2, image->get_height() / 2);
        gtk_selection_data_set (selection_data, selection_data->target, 8, (const guchar*)"canio.png", 9);
 }
 
@@ -120,3 +127,24 @@ void DnDWindow::on_label_drop_drag_data_received(const Glib::RefPtr<Gdk::DragCon
   context->drag_finish(false, false, time);
 }
 
+void DnDWindow::on_canio_drag_begin(const Glib::RefPtr<Gdk::DragContext>& context)
+{
+       Glib::RefPtr<Gdk::Pixbuf> image;
+       image = Gdk::Pixbuf::create_from_file("canio.png");
+       context->set_icon(image, image->get_width() / 2, image->get_height() / 4);
+}
+
+void DnDWindow::on_y_drag_begin(const Glib::RefPtr<Gdk::DragContext>& context)
+{
+       Glib::RefPtr<Gdk::Pixbuf> image;
+       image = Gdk::Pixbuf::create_from_file("y.png");
+       context->set_icon(image, image->get_width() / 4, image->get_height() / 4);
+}
+
+void DnDWindow::on_codo_drag_begin(const Glib::RefPtr<Gdk::DragContext>& context)
+{
+       Glib::RefPtr<Gdk::Pixbuf> image;
+       image = Gdk::Pixbuf::create_from_file("codo.png");
+       context->set_icon(image, 0, 0);//image->get_width() / 2, image->get_height() / 2);
+}
+

diff --git a/tests/GUI/dndwindow.h b/tests/GUI/dndwindow.h
index 2f0d09c6f732d3fbc8cf9ee529063df4f5d09b39..8c590288aec498ef7925cc05ff7829e803221b8c 100644 (file)
--- a/tests/GUI/dndwindow.h
+++ b/tests/GUI/dndwindow.h
@@ -39,6 +39,10 @@ protected:
   virtual void on_y_drag_data_get(const Glib::RefPtr<Gdk::DragContext>& context, GtkSelectionData* selection_data, guint info, guint time);
   virtual void on_codo_drag_data_get(const Glib::RefPtr<Gdk::DragContext>& context, GtkSelectionData* selection_data, guint info, guint time);
        virtual void on_label_drop_drag_data_received(const Glib::RefPtr<Gdk::DragContext>& context, int x, int y, GtkSelectionData* selection_data, guint info, guint time);
+  // Señales para cambiar el icono cuando empieza el drag.
+  virtual void on_canio_drag_begin(const Glib::RefPtr<Gdk::DragContext>& context);
+  virtual void on_y_drag_begin(const Glib::RefPtr<Gdk::DragContext>& context);
+  virtual void on_codo_drag_begin(const Glib::RefPtr<Gdk::DragContext>& context);
 
 
        void  on_item_button_down();

diff --git a/tests/GUI/item.cc b/tests/GUI/item.cc
index 25ca9f3ad0200077fec83f29d25e4661b65d68d9..907b4359cc52991f9d52b17749b83ba2d90b8ae9 100644 (file)
--- a/tests/GUI/item.cc
+++ b/tests/GUI/item.cc
@@ -18,10 +18,13 @@ CItem::~CItem()
 
 bool CItem::on_expose_event(GdkEventExpose* event)
 {
-       image->render_to_drawable(get_window(), get_style()->get_black_gc(), \
-                                       0, 0, 0, 0, image->get_width(), image->get_height(), Gdk::RGB_DITHER_NONE, 0, 0);
+       image->render_to_drawable(get_window(), get_style()->get_black_gc(),
+               0, 0, 0, 0, image->get_width(), 
+               image->get_height(), Gdk::RGB_DITHER_NONE, 0, 0);
 
-       Gtk::DrawingArea::on_expose_event(event);
+       // XXX Esto no deberia ser necesario! en todo caso devolves false en
+       // vez de true para que siga llamando a los otros handlers :)
+       //Gtk::DrawingArea::on_expose_event(event);
        return true;
 }