Hello,
I get this message when I play with my following minimal example.
(minimal:14414): GtkSourceView-CRITICAL **:
gtk_source_undo_manager_undo: assertion `undo_action != NULL' failed
Anybody can help me ?
Thanks a lot,
--
François
#include <string>
#include <gtkmm.h>
#include <gtksourceviewmm.h>
using namespace std ;
using namespace Glib ;
#define Gsv gtksourceview
class OverriddenSourceView ;
class App {
private :
Gtk::Window * m_ptr_window ;
OverriddenSourceView * m_ptr_source_view ;
public:
App() ;
~App() ;
Gtk::Window & get_window() const { return *m_ptr_window ; }
bool on_key_press_event(GdkEventKey* event) ;
bool on_key_release_event(GdkEventKey* event) ;
} ;
// This class exists only to intercept the "on_key_press_event" events
adressed to the
// source_view et to redirect the events to the member functions
// "App::on_key_press_event".
class OverriddenSourceView : public Gsv::SourceView {
private :
App * m_ptr_App ;
typedef bool (App::*tmp_t)(GdkEventKey *) ;
tmp_t m_ptr_key_press ;
public :
OverriddenSourceView (App & App ,tmp_t ptr_key_press) :
SourceView(),
m_ptr_App(&App),
m_ptr_key_press(ptr_key_press) {}
protected :
// If the member function return "true", then return "true" to
stop
the key process;
// else call the process of the SourceView class.
virtual bool on_key_press_event(GdkEventKey* event) {
return (m_ptr_App->*m_ptr_key_press)(event) ? true :
Gsv::SourceView::on_key_press_event(event) ;
}
} ;
App::App() {
m_ptr_window = new(Gtk::Window) ;
m_ptr_source_view = manage(new OverriddenSourceView(*this,
&App::on_key_press_event)) ;
m_ptr_window->add(*m_ptr_source_view) ;
RefPtr<Gsv::SourceBuffer> ptr_sb =
m_ptr_source_view->get_source_buffer() ;
ptr_sb->begin_not_undoable_action() ;
ptr_sb->insert(ptr_sb->begin(), "First line\nSecond line") ;
ptr_sb->end_not_undoable_action() ;
ptr_sb->set_modified(false) ;
}
App::~App() {
if (m_ptr_window) {
delete m_ptr_window ;
m_ptr_window = 0 ;
}
}
bool App::on_key_press_event(GdkEventKey* event) {
if ( event->keyval == GDK_Tab ) {
m_ptr_source_view->get_source_buffer()->insert_at_cursor("##TAB##") ;
return true ; // Stop the SourceView process of key pressed.
}
return false ;
}
int main(int argc, char **argv) {
Gtk::Main kit(argc, argv) ;
gtksourceview::init() ;
App App ;
App.get_window().set_size_request(500, 400) ;
App.get_window().show_all() ;
kit.run(App.get_window()) ;
return 0 ;
}
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