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/*
* Copyright (C) 2014-2015 Paul Davis <paul@linuxaudiosystems.com>
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <algorithm>
#include "canvas/canvas.h"
#include "canvas/tracking_text.h"
using namespace ArdourCanvas;
TrackingText::TrackingText (Canvas* c)
: Text (c)
, track_x (true)
, track_y (true)
, offset (Duple (10, 10))
{
init ();
}
TrackingText::TrackingText (Item* p)
: Text (p)
, track_x (true)
, track_y (true)
, offset (Duple (10, 10))
{
init ();
}
void
TrackingText::init ()
{
_canvas->MouseMotion.connect (sigc::mem_fun (*this, &TrackingText::pointer_motion));
set_ignore_events (true);
set_outline (true);
hide ();
}
void
TrackingText::pointer_motion (Duple const & winpos)
{
if (!_visible) {
return;
}
Duple pos (_parent->window_to_item (winpos));
if (!track_x) {
pos.x = position().x;
}
if (!track_y) {
pos.y = position().y;
}
pos = pos.translate (offset);
/* keep inside the window */
Rect r (0, 0, _canvas->width(), _canvas->height());
/* border of 200 pixels on the right, and 50 on all other sides */
const double border = 50.0;
r.x0 += border;
r.x1 = std::max (r.x0, (r.x1 - 200.0));
r.y0 += border;
r.y1 = std::max (r.y0, (r.y1 - border));
/* clamp */
if (pos.x < r.x0) {
pos.x = r.x0;
} else if (pos.x > r.x1) {
pos.x = r.x1;
}
if (pos.y < r.y0) {
pos.y = r.y0;
} else if (pos.y > r.y1) {
pos.y = r.y1;
}
/* move */
set_position (pos);
}
void
TrackingText::show_and_track (bool tx, bool ty)
{
track_x = tx;
track_y = ty;
bool was_visible = _visible;
show ();
if (!was_visible) {
/* move to current pointer location. do this after show() so that
* _visible is true, and thus ::pointer_motion() will do
* something.
*/
Duple winpos;
if (!_canvas->get_mouse_position (winpos)) {
return;
}
pointer_motion (winpos);
}
}
void
TrackingText::set_x_offset (double o)
{
begin_change ();
offset.x = o;
end_change ();
}
void
TrackingText::set_y_offset (double o)
{
begin_change ();
offset.y = o;
end_change ();
}
void
TrackingText::set_offset (Duple const & d)
{
begin_change ();
offset = d;
end_change ();
}
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