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Further to my problem with a call to Gdk::Pixbuf::create(), I
compiled the gtk libraries with debugging support and ran my test
program under gdb. Here is the output from stepping into the Gdk
library. Any suggestions on where to go now? Exactly where do I
file a bug with bugzilla? Sorry about my ignorance! :-) ******************** (gdb) break 134 Breakpoint 1 at 0x1000021b9: file main-2.cc, line 134. (gdb) run Starting program: /Users/jim-2/pixbuf_test/bin/Debug/myprog Reading symbols for shared libraries ++++++++++++++++++++++.................................................................................................................................................... done Reading symbols for shared libraries . done Reading symbols for shared libraries . done Reading symbols for shared libraries . done Reading symbols for shared libraries . done Reading symbols for shared libraries . done In Area::on_draw()... In Area::on_draw()... Realized 1 Breakpoint 1, PlotTest::on_test_clicked (this=0x7fff5fbfee98) at main-2.cc:134 warning: Source file is more recent than executable. 134 Glib::RefPtr<Gdk::Pixbuf> pixbuf_ = Gdk::Pixbuf::create(myarea.myarea_win_, 0,0,winw,winh); (gdb) s Gdk::Pixbuf::create (src="" src_x=0, src_y=0, width=500, height=300) at pixbuf.cc:381 381 return Glib::RefPtr<Pixbuf>( new Pixbuf(src, src_x, src_y, width, height) ); (gdb) s Gdk::Pixbuf::Pixbuf (this=0x102543b90, src="" src_x=0, src_y=0, width=500, height=300) at pixbuf.cc:68 68 src->gobj(), src_x, src_y, width, height)) (gdb) s Glib::ObjectBase::ObjectBase (this=0x102543ba0, __vtt_parm=0x100a005a8) at objectbase.cc:49 49 cpp_destruction_in_progress_ (false) (gdb) s 50 {} (gdb) s (myprog:38919): glibmm-CRITICAL **: Glib::Interface::Interface(const Glib::Interface_Class&): assertion `gobject_ != 0' failed (myprog:38919): GLib-GObject-CRITICAL **: g_object_unref: assertion `G_IS_OBJECT (object)' failed ********************* Here is the program ********************* #include <gtkmm/main.h> #include <gtkmm/box.h> #include <gtkmm/window.h> #include <gtkmm/separator.h> #include <gtkmm/textview.h> #include <gtkmm.h> #include <gtkmm/drawingarea.h> #include <gtkmm/image.h> #include <gtkmm/stock.h> #include <iostream> #include <cairomm/context.h> #include <gtkmm/button.h> class Area : public Gtk::DrawingArea { public: Area(); virtual ~Area(); Glib::RefPtr<Gdk::Window> myarea_win_; protected: virtual bool on_draw(const Cairo::RefPtr<Cairo::Context>& cr); virtual void on_realize(); }; Area::Area() { } Area::~Area() { } bool Area::on_draw(const Cairo::RefPtr<Cairo::Context>& cr) { printf("In Area::on_draw()...\n"); return true; } void Area::on_realize() { // We need to call the base on_realize() Gtk::DrawingArea::on_realize(); myarea_win_ = get_window(); } class PlotTest : public Gtk::Window { public: PlotTest(); virtual ~PlotTest(); protected: Area myarea; //Signal handlers: void on_close_clicked(); void on_test_clicked(); //Child widgets: Gtk::TextView t_view; Gtk::Box m_Box_Top; Gtk::Button m_Button_Close; Gtk::Button m_Button_Test; }; PlotTest::PlotTest() : m_Box_Top(Gtk::ORIENTATION_VERTICAL), m_Button_Close("Close"), m_Button_Test("Test Pixbuf Code") { // Set title and border of the window set_title("Cairo Test"); set_border_width(0); add(m_Box_Top); // Add myarea to m_Box3. myarea is an Area object (see myarea.h) myarea.set_size_request(500, 300); m_Box_Top.pack_start(myarea); // Put Close button in Box2: m_Box_Top.pack_start(m_Button_Close); m_Box_Top.pack_start(m_Button_Test); m_Button_Close.set_can_default(); m_Button_Close.grab_default(); // Connect the clicked signal of the button to m_Button_Close.signal_clicked().connect(sigc::mem_fun(*this, &PlotTest::on_close_clicked) ); m_Button_Test.signal_clicked().connect(sigc::mem_fun(*this, &PlotTest::on_test_clicked) ); show_all(); } PlotTest::~PlotTest() { } void PlotTest::on_close_clicked() { hide(); //to close the application. } void PlotTest::on_test_clicked() { int winx, winy, winw, winh; printf("Realized %i\n", myarea.get_realized()); myarea.get_window()->get_geometry(winx, winy, winw, winh); Glib::RefPtr<Gdk::Pixbuf> pixbuf_ = Gdk::Pixbuf::create(myarea.myarea_win_, 0,0,winw,winh); } int main(int argc, char *argv[]) { Gtk::Main kit(argc, argv); PlotTest Prog; //Shows the window and returns when it is closed. Gtk::Main::run(Prog); return 0; } **************************** |