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livetrax/libs/gtkmm2ext/persistent_tooltip.cc

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/*
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 "pbd/stacktrace.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, bool draggable, int margin_y)
: _target (target)
, _window (0)
, _label (0)
, _draggable (draggable)
, _maybe_dragging (false)
, _align_to_center (true)
, _margin_y (margin_y)
{
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 *)
{
if (_timeout.connected()) {
leave(NULL);
}
_timeout = Glib::signal_timeout().connect (sigc::mem_fun (*this, &PersistentTooltip::timeout), 500);
return false;
}
bool
PersistentTooltip::timeout ()
{
show ();
return false;
}
bool
PersistentTooltip::leave (GdkEventCrossing *)
{
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_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 && _draggable;
}
void
PersistentTooltip::hide ()
{
if (_window) {
_window->hide ();
}
}
void
PersistentTooltip::show ()
{
if (_tip.empty()) {
return;
}
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->modify_font (_font);
_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 ()) {
int rx, ry;
int sw = gdk_screen_width ();
_target->get_window()->get_origin (rx, ry);
/* the window needs to be realized first
* for _window->get_width() to be correct.
*/
if (sw < rx + _window->get_width()) {
/* right edge of window would be off the right edge of
the screen, so don't show it in the usual place.
*/
rx = sw - _window->get_width();
_window->move (rx, ry + _target->get_height() + _margin_y);
} else {
if (_align_to_center) {
_window->move (rx + (_target->get_width () - _window->get_width ()) / 2, ry + _target->get_height());
} else {
_window->move (rx, ry + _target->get_height());
}
}
_window->present ();
}
}
void
PersistentTooltip::set_tip (string t)
{
_tip = t;
if (_label) {
_label->set_markup (t);
}
}
void
PersistentTooltip::set_font (Pango::FontDescription font)
{
_font = font;
if (_label) {
_label->modify_font (_font);
}
}
void
PersistentTooltip::set_center_alignment (bool align_to_center)
{
_align_to_center = align_to_center;
}