Factor out 'persistent' tooltip code from the panner

interface and use it for processor box sliders (#4461).


git-svn-id: svn://localhost/ardour2/branches/3.0@12661 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 148 insertions, 0 deletions

diff --git a/libs/gtkmm2ext/persistent_tooltip.cc b/libs/gtkmm2ext/persistent_tooltip.cc
new file mode 100644
index 0000000000..d50bbe7588
--- /dev/null
+++ b/libs/gtkmm2ext/persistent_tooltip.cc
@@ -0,0 +1,148 @@
+/*
+    Copyright (C) 2012 Paul Davis
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#include <gtkmm/window.h>
+#include <gtkmm/label.h>
+#include "gtkmm2ext/persistent_tooltip.h"
+
+#include "i18n.h"
+
+using namespace std;
+using namespace Gtk;
+using namespace Gtkmm2ext;
+
+/** @param target The widget to provide the tooltip for */
+PersistentTooltip::PersistentTooltip (Gtk::Widget* target)
+	: _target (target)
+	, _window (0)
+	, _label (0)
+	, _maybe_dragging (false)
+{
+	target->signal_enter_notify_event().connect (sigc::mem_fun (*this, &PersistentTooltip::enter), false);
+	target->signal_leave_notify_event().connect (sigc::mem_fun (*this, &PersistentTooltip::leave), false);
+	target->signal_button_press_event().connect (sigc::mem_fun (*this, &PersistentTooltip::press), false);
+	target->signal_button_release_event().connect (sigc::mem_fun (*this, &PersistentTooltip::release), false);
+}
+
+PersistentTooltip::~PersistentTooltip ()
+{
+	delete _window;
+}
+
+bool
+PersistentTooltip::enter (GdkEventCrossing *)
+{
+	_timeout = Glib::signal_timeout().connect (sigc::mem_fun (*this, &PersistentTooltip::timeout), 500);
+	return false;
+}
+
+bool
+PersistentTooltip::timeout ()
+{
+	show ();
+	return false;
+}
+
+bool
+PersistentTooltip::leave (GdkEventCrossing *)
+{
+	_timeout.disconnect ();
+	if (!dragging ()) {
+		hide ();
+	}
+
+	return false;
+}
+
+bool
+PersistentTooltip::press (GdkEventButton* ev)
+{
+	if (ev->type == GDK_BUTTON_PRESS && ev->button == 1) {
+		_maybe_dragging = true;
+	}
+
+	return false;
+}
+
+bool
+PersistentTooltip::release (GdkEventButton* ev)
+{
+	if (ev->type == GDK_BUTTON_RELEASE && ev->button == 1) {
+		_maybe_dragging = false;
+	}
+
+	return false;
+}
+
+bool
+PersistentTooltip::dragging () const
+{
+	return _maybe_dragging;
+}
+
+void
+PersistentTooltip::hide ()
+{
+	if (_window) {
+		_window->hide ();
+	}
+}
+
+void
+PersistentTooltip::show ()
+{
+	if (!_window) {
+		_window = new Window (WINDOW_POPUP);
+		_window->set_name (X_("ContrastingPopup"));
+		_window->set_position (WIN_POS_MOUSE);
+		_window->set_decorated (false);
+
+		_label = manage (new Label);
+		_label->set_use_markup (true);
+
+		_window->set_border_width (6);
+		_window->add (*_label);
+		_label->show ();
+
+		Gtk::Window* tlw = dynamic_cast<Gtk::Window*> (_target->get_toplevel ());
+		if (tlw) {
+			_window->set_transient_for (*tlw);
+		}
+	}
+	
+	set_tip (_tip);
+
+        if (!_window->is_visible ()) {
+                /* move the window a little away from the mouse */
+                int rx, ry;
+                _target->get_window()->get_origin (rx, ry);
+                _window->move (rx, ry + _target->get_height());
+                _window->present ();
+        }
+}
+
+void
+PersistentTooltip::set_tip (string t)
+{
+	_tip = t;
+
+	if (_label) {
+		_label->set_markup (t);
+	}
+}