Fix --template commandline option

[ardour.git] / gtk2_ardour / mixer_ui.cc

diff --git a/gtk2_ardour/mixer_ui.cc b/gtk2_ardour/mixer_ui.cc
index 4bf6d60f7be15fa710d42c8debc6b95a95b2b517..71f6bca825fa7b677e8787125b2337bb9af2c5d5 100644 (file)
--- a/gtk2_ardour/mixer_ui.cc
+++ b/gtk2_ardour/mixer_ui.cc
@@ -30,6 +30,7 @@
 #include <glibmm/threads.h>
 
 #include <gtkmm/accelmap.h>
+#include <gtkmm/offscreenwindow.h>
 #include <gtkmm/stock.h>
 
 #include "pbd/convert.h"
@@ -3501,3 +3502,83 @@ Mixer_UI::vca_unassign (boost::shared_ptr<VCA> vca)
                }
        }
 }
+
+bool
+Mixer_UI::screenshot (std::string const& filename)
+{
+       if (!_session) {
+               return false;
+       }
+
+       int height = strip_packer.get_height();
+       bool with_vca = vca_vpacker.is_visible ();
+       MixerStrip* master = strip_by_route (_session->master_out ());
+
+       Gtk::OffscreenWindow osw;
+       Gtk::HBox b;
+       osw.add (b);
+       b.show ();
+
+       /* unpack widgets, add to OffscreenWindow */
+
+       strip_group_box.remove (strip_packer);
+       b.pack_start (strip_packer, false, false);
+       /* hide extra elements inside strip_packer */
+       add_button.hide ();
+       scroller_base.hide ();
+#ifdef MIXBUS
+       mb_shadow.hide();
+#endif
+
+       if (with_vca) {
+               /* work around Gtk::ScrolledWindow */
+               Gtk::Viewport* viewport = (Gtk::Viewport*) vca_scroller.get_child();
+               viewport->remove (); // << vca_hpacker
+               b.pack_start (vca_hpacker, false, false);
+               /* hide some growing widgets */
+               add_vca_button.hide ();
+               vca_scroller_base.hide();
+       }
+
+       if (master) {
+               out_packer.remove (*master);
+               b.pack_start (*master, false, false);
+               master->hide_master_spacer (true);
+       }
+
+       /* prepare the OffscreenWindow for rendering */
+       osw.set_size_request (-1, height);
+       osw.show ();
+       osw.queue_resize ();
+       osw.queue_draw ();
+       osw.get_window()->process_updates (true);
+
+       /* create screenshot */
+       Glib::RefPtr<Gdk::Pixbuf> pb = osw.get_pixbuf ();
+       pb->save (filename, "png");
+
+       /* unpack elements before destorying the Box & OffscreenWindow */
+       list<Gtk::Widget*> children = b.get_children();
+       for (list<Gtk::Widget*>::iterator child = children.begin(); child != children.end(); ++child) {
+               b.remove (**child);
+       }
+       osw.remove ();
+
+       /* now re-pack the widgets into the main mixer window */
+       add_button.show ();
+       scroller_base.show ();
+#ifdef MIXBUS
+       mb_shadow.show();
+#endif
+       strip_group_box.pack_start (strip_packer);
+       if (with_vca) {
+               add_vca_button.show ();
+               vca_scroller_base.show();
+               vca_scroller.add (vca_hpacker);
+       }
+       if (master) {
+               master->hide_master_spacer (false);
+               out_packer.pack_start (*master, false, false);
+       }
+       return true;
+}