Add a small tool to experiment with libcanvas

1 files changed, 239 insertions, 0 deletions

diff --git a/gtk2_ardour/canvas_test.cc b/gtk2_ardour/canvas_test.cc
new file mode 100644
index 0000000000..9ccc242813
--- /dev/null
+++ b/gtk2_ardour/canvas_test.cc
@@ -0,0 +1,239 @@
+#include <glibmm.h>
+#include <gtkmm/main.h>
+#include <gtkmm/box.h>
+#include <gtkmm/window.h>
+
+#include "pbd/debug.h"
+#include "pbd/error.h"
+#include "pbd/failed_constructor.h"
+#include "pbd/pthread_utils.h"
+#include "pbd/receiver.h"
+#include "pbd/transmitter.h"
+
+#include "ardour/audioengine.h"
+#include "ardour/filename_extensions.h"
+#include "ardour/types.h"
+
+#include "gtkmm2ext/application.h"
+#include "gtkmm2ext/window_title.h"
+#include "gtkmm2ext/gtk_ui.h"
+#include "gtkmm2ext/utils.h"
+
+#include "canvas/types.h"
+#include "canvas/canvas.h"
+#include "canvas/container.h"
+#include "canvas/colors.h"
+#include "canvas/scroll_group.h"
+#include "canvas/text.h"
+
+#include "ardour_button.h"
+#include "ui_config.h"
+
+#include "pbd/i18n.h"
+
+using namespace std;
+using namespace ARDOUR;
+using namespace PBD;
+using namespace Gtkmm2ext;
+using namespace Gtk;
+
+#include "ardour/vst_types.h"
+
+static const char* localedir = LOCALEDIR;
+int vstfx_init (void*) { return 0; }
+void vstfx_exit () {}
+void vstfx_destroy_editor (VSTState*) {}
+
+class LogReceiver : public Receiver
+{
+  protected:
+    void receive (Transmitter::Channel chn, const char * str);
+};
+
+static LogReceiver log_receiver;
+
+void
+LogReceiver::receive (Transmitter::Channel chn, const char * str)
+{
+	const char *prefix = "";
+
+	switch (chn) {
+	case Transmitter::Error:
+		prefix = "[ERROR]: ";
+		break;
+	case Transmitter::Info:
+		prefix = "[INFO]: ";
+		break;
+	case Transmitter::Warning:
+		prefix = "[WARNING]: ";
+		break;
+	case Transmitter::Fatal:
+		prefix = "[FATAL]: ";
+		break;
+	case Transmitter::Throw:
+		/* this isn't supposed to happen */
+		cerr << "Game Over\n";
+		abort ();
+	}
+
+	/* note: iostreams are already thread-safe: no external
+	   lock required.
+	*/
+
+	std::cout << prefix << str << std::endl;
+
+	if (chn == Transmitter::Fatal) {
+		::exit (9);
+	}
+}
+
+/* ***************************************************************************/
+/* ***************************************************************************/
+/* ***************************************************************************/
+
+class CANVAS_UI : public Gtkmm2ext::UI, public ARDOUR::SessionHandlePtr
+{
+public:
+	CANVAS_UI (int *argcp, char **argvp[], const char* localedir);
+	~CANVAS_UI();
+private:
+	int starting ();
+	bool main_window_delete_event (GdkEventAny* ev) { finish (); return true; }
+	void finish () { quit (); }
+	Gtk::Window _main_window;
+
+	ArdourCanvas::Container* initialize_canvas (ArdourCanvas::Canvas& canvas);
+
+	void canvas_size_request (Gtk::Requisition* req);
+	void canvas_size_allocated (Gtk::Allocation& alloc);
+
+	ArdourCanvas::GtkCanvas* canvas;
+	ArdourCanvas::Container* group;
+
+	ArdourButton test_button;
+};
+
+/* ***************************************************************************/
+
+CANVAS_UI::CANVAS_UI (int *argcp, char **argvp[], const char* localedir)
+	: Gtkmm2ext::UI (PROGRAM_NAME, X_("gui"), argcp, argvp)
+{
+	Gtkmm2ext::init (localedir);
+	UIConfiguration::instance().post_gui_init ();
+
+	Gtkmm2ext::WindowTitle title ("Canvas Test");
+	_main_window.set_title (title.get_string());
+	_main_window.set_flags (CAN_FOCUS);
+	_main_window.signal_delete_event().connect (sigc::mem_fun (*this, &CANVAS_UI::main_window_delete_event));
+
+
+	VBox* b = manage (new VBox);
+	Label* l = manage (new Label ("Hello there"));
+
+	canvas = new ArdourCanvas::GtkCanvas ();
+	group = initialize_canvas (*canvas);
+
+	canvas->signal_size_request().connect (sigc::mem_fun (*this, &CANVAS_UI::canvas_size_request));
+	canvas->signal_size_allocate().connect (sigc::mem_fun (*this, &CANVAS_UI::canvas_size_allocated));
+	test_button.signal_clicked.connect (sigc::mem_fun (*this, &CANVAS_UI::finish));
+
+	test_button.set_text ("Don't click me");
+
+	b->pack_start (*l, false, 0);
+	b->pack_start (test_button, false, 0);
+	b->pack_start (*canvas, true, 0);
+
+	_main_window.add (*b);
+	_main_window.show_all ();
+}
+
+CANVAS_UI::~CANVAS_UI ()
+{
+}
+
+int
+CANVAS_UI::starting ()
+{
+	Application* app = Application::instance ();
+	app->ready ();
+	return 0;
+}
+
+ArdourCanvas::Container*
+CANVAS_UI::initialize_canvas (ArdourCanvas::Canvas& canvas)
+{
+	using namespace ArdourCanvas;
+	canvas.set_background_color (rgba_to_color (0.0, 0.0, 1.0, 1.0));
+
+	ScrollGroup* scroll_group = new ScrollGroup (canvas.root(),
+			ScrollGroup::ScrollSensitivity (ScrollGroup::ScrollsVertically|ScrollGroup::ScrollsHorizontally));
+
+	Text* text = new Text (scroll_group);
+	text->set ("Canvas Text");
+
+	return new ArdourCanvas::Container (scroll_group);
+}
+
+void
+CANVAS_UI::canvas_size_request (Gtk::Requisition* req)
+{
+	req->width = 100;
+	req->height = 100;
+}
+
+void
+CANVAS_UI::canvas_size_allocated (Gtk::Allocation& alloc)
+{
+}
+
+/* ***************************************************************************/
+/* ***************************************************************************/
+/* ***************************************************************************/
+
+static CANVAS_UI  *ui = 0;
+
+int main (int argc, char **argv)
+{
+#if 0
+	fixup_bundle_environment (argc, argv, localedir);
+	load_custom_fonts();
+	// TODO setlocale..
+#endif
+
+	if (!ARDOUR::init (false, true, localedir)) {
+		cerr << "Ardour failed to initialize\n" << endl;
+		::exit (EXIT_FAILURE);
+	}
+
+	if (!Glib::thread_supported()) {
+		Glib::thread_init();
+	}
+
+	pthread_setcanceltype (PTHREAD_CANCEL_ASYNCHRONOUS, 0);
+
+	log_receiver.listen_to (error);
+	log_receiver.listen_to (info);
+	log_receiver.listen_to (fatal);
+	log_receiver.listen_to (warning);
+
+	if (UIConfiguration::instance().pre_gui_init ()) {
+		error << _("Could not complete pre-GUI initialization") << endmsg;
+		exit (1);
+	}
+
+	// we could load a session here, if needed
+	// see ../session_utils/common.cc
+
+	ui = new CANVAS_UI (&argc, &argv, localedir);
+	ui->run (log_receiver);
+
+	info << "Farewell" << endmsg;
+
+	Gtkmm2ext::Application::instance()->cleanup();
+	delete ui;
+	ui = 0;
+
+	ARDOUR::cleanup ();
+	pthread_cancel_all ();
+	return 0;
+}