Re: DrawingArea in ScrolledWindow


2)  How can I get the dimensions of the visible part?  (I tried
manually adding the Viewport, then calling
get_window()->get_geometry(), but that gave a value slightly too
large; that seems to track things unnecessarily and I'm not sure
exactly how much I need to deduct.)
you could do the following (not sure if it is the best solution ;-) )...

get the H- and VAdjustment of your Scrolledwindow:


connect the changed and value_changed signal

m_pHAdj->signal_value_changed ().connect( sigc::mem_fun(*this, &ScrolledWindow::on_scrollbar_changed) ); m_pVAdj->signal_value_changed ().connect( sigc::mem_fun(*this, &ScrolledWindow::on_scrollbar_changed) ); m_pHAdj->signal_changed ().connect( sigc::mem_fun(*this, &ScrolledWindow::on_scrollbar_changed) ); m_pVAdj->signal_changed ().connect( sigc::mem_fun(*this, &ScrolledWindow::on_scrollbar_changed) );

void ScrolledWindow::on_scrollbar_changed(){
   double value_v, value_h, size_v, size_h;

   size_h =m_pHAdj->get_page_size(); //current dimension
   size_v =m_pVAdj->get_page_size();  //current dimension


Regards Alex

Alexander Gehlert reply to : alexander gehlert raritan com

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