154 lines
2.8 KiB
C++
154 lines
2.8 KiB
C++
/*
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* Copyright (C) 2014-2015 Paul Davis <paul@linuxaudiosystems.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <algorithm>
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#include "canvas/canvas.h"
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#include "canvas/tracking_text.h"
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using namespace ArdourCanvas;
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TrackingText::TrackingText (Canvas* c)
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: Text (c)
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, track_x (true)
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, track_y (true)
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, offset (Duple (10, 10))
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{
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init ();
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}
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TrackingText::TrackingText (Item* p)
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: Text (p)
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, track_x (true)
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, track_y (true)
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, offset (Duple (10, 10))
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{
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init ();
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}
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void
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TrackingText::init ()
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{
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_canvas->MouseMotion.connect (sigc::mem_fun (*this, &TrackingText::pointer_motion));
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set_ignore_events (true);
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set_outline (true);
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hide ();
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}
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void
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TrackingText::pointer_motion (Duple const& winpos)
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{
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if (!_visible) {
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return;
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}
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Duple pos (_parent->window_to_item (winpos));
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if (!track_x) {
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pos.x = position ().x;
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} else {
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pos.x += offset.x;
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}
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if (!track_y) {
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pos.y = position ().y;
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} else {
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pos.y += offset.y;
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}
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/* keep inside the window */
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Rect r (0, 0, _canvas->width (), _canvas->height ());
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/* border of 200 pixels on the right, and 50 on all other sides */
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const double border = 50.0;
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r.x0 += border;
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r.x1 = std::max (r.x0, (r.x1 - 200.0));
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r.y0 += border;
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r.y1 = std::max (r.y0, (r.y1 - border));
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/* clamp */
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if (pos.x < r.x0) {
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pos.x = r.x0;
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} else if (pos.x > r.x1) {
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pos.x = r.x1;
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}
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if (pos.y < r.y0) {
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pos.y = r.y0;
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} else if (pos.y > r.y1) {
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pos.y = r.y1;
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}
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/* move */
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set_position (pos);
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set_bbox_dirty ();
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}
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void
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TrackingText::show_and_track (bool tx, bool ty)
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{
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track_x = tx;
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track_y = ty;
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bool was_visible = _visible;
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show ();
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if (!was_visible) {
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/* move to current pointer location. do this after show() so that
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* _visible is true, and thus ::pointer_motion() will do
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* something.
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*/
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Duple winpos;
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if (!_canvas->get_mouse_position (winpos)) {
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return;
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}
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pointer_motion (winpos);
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}
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}
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void
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TrackingText::set_x_offset (double o)
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{
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begin_change ();
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offset.x = o;
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end_change ();
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}
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void
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TrackingText::set_y_offset (double o)
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{
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begin_change ();
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offset.y = o;
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end_change ();
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}
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void
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TrackingText::set_offset (Duple const& d)
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{
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begin_change ();
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offset = d;
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end_change ();
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}
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