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livetrax/gtk2_ardour/marker.cc
Carl Hetherington 8496f57fd4 Prevent marker labels overlapping. Fixes #3535. 
git-svn-id: svn://localhost/ardour2/branches/3.0@8015 d708f5d6-7413-0410-9779-e7cbd77b26cf
2010-11-12 22:51:54 +00:00

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/*
Copyright (C) 2001 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 <sigc++/bind.h>
#include "ardour/tempo.h"
#include "ardour_ui.h"
/*
* ardour_ui.h include was moved to the top of the list
* due to a conflicting definition of 'Rect' between
* Apple's MacTypes.h and GTK.
*/
#include "marker.h"
#include "public_editor.h"
#include "utils.h"
#include "canvas_impl.h"
#include "simpleline.h"
#include <gtkmm2ext/utils.h>
#include "i18n.h"
using namespace std;
using namespace ARDOUR;
using namespace Gtkmm2ext;
PBD::Signal1<void,Marker*> Marker::CatchDeletion;
Marker::Marker (PublicEditor& ed, ArdourCanvas::Group& parent, ArdourCanvas::Group& line_parent, guint32 rgba, const string& annotation,
Type type, nframes_t frame, bool handle_events)
: editor (ed)
, _parent (&parent)
, _line_parent (&line_parent)
, _line (0)
, _type (type)
, _selected (false)
, _shown (false)
, _line_shown (false)
, _canvas_height (0)
, _color (rgba)
, _left_label_limit (DBL_MAX)
, _right_label_limit (DBL_MAX)
{
double label_offset = 0;
/* Shapes we use:
Mark:
(0,0) -> (6,0)
^ |
| V
(0,5) (6,5)
\ /
(3,10)
TempoMark:
MeterMark:
(3,0)
/ \
(0,5) -> (6,5)
^ |
| V
(0,10)<-(6,10)
Start:
0,0\
| \
| \ 6,6
| /
| /
0,12
End:
/12,0
/ |
/ |
6,6 |
\ |
\ |
\ |
12,12
PunchIn:
0,0 ------> 13,0
| /
| /
| /
| /
| /
| /
0,13
PunchOut
0,0 -->-13,0
\ |
\ |
\ |
\ |
\ |
\ |
13,13
*/
switch (type) {
case Mark:
points = new ArdourCanvas::Points ();
points->push_back (Gnome::Art::Point (0.0, 0.0));
points->push_back (Gnome::Art::Point (6.0, 0.0));
points->push_back (Gnome::Art::Point (6.0, 5.0));
points->push_back (Gnome::Art::Point (3.0, 10.0));
points->push_back (Gnome::Art::Point (0.0, 5.0));
points->push_back (Gnome::Art::Point (0.0, 0.0));
_shift = 3;
label_offset = 8.0;
break;
case Tempo:
case Meter:
points = new ArdourCanvas::Points ();
points->push_back (Gnome::Art::Point (3.0, 0.0));
points->push_back (Gnome::Art::Point (6.0, 5.0));
points->push_back (Gnome::Art::Point (6.0, 10.0));
points->push_back (Gnome::Art::Point (0.0, 10.0));
points->push_back (Gnome::Art::Point (0.0, 5.0));
points->push_back (Gnome::Art::Point (3.0, 0.0));
_shift = 3;
label_offset = 8.0;
break;
case SessionStart:
case RangeStart:
points = new ArdourCanvas::Points ();
points->push_back (Gnome::Art::Point (0.0, 0.0));
points->push_back (Gnome::Art::Point (6.5, 6.5));
points->push_back (Gnome::Art::Point (0.0, 13.0));
points->push_back (Gnome::Art::Point (0.0, 0.0));
_shift = 0;
label_offset = 13.0;
break;
case SessionEnd:
case RangeEnd:
points = new ArdourCanvas::Points ();
points->push_back (Gnome::Art::Point (6.5, 6.5));
points->push_back (Gnome::Art::Point (13.0, 0.0));
points->push_back (Gnome::Art::Point (13.0, 13.0));
points->push_back (Gnome::Art::Point (6.5, 6.5));
_shift = 13;
label_offset = 6.0;
break;
case LoopStart:
points = new ArdourCanvas::Points ();
points->push_back (Gnome::Art::Point (0.0, 0.0));
points->push_back (Gnome::Art::Point (13.0, 13.0));
points->push_back (Gnome::Art::Point (0.0, 13.0));
points->push_back (Gnome::Art::Point (0.0, 0.0));
_shift = 0;
label_offset = 12.0;
break;
case LoopEnd:
points = new ArdourCanvas::Points ();
points->push_back (Gnome::Art::Point (13.0, 0.0));
points->push_back (Gnome::Art::Point (13.0, 13.0));
points->push_back (Gnome::Art::Point (0.0, 13.0));
points->push_back (Gnome::Art::Point (13.0, 0.0));
_shift = 13;
label_offset = 0.0;
break;
case PunchIn:
points = new ArdourCanvas::Points ();
points->push_back (Gnome::Art::Point (0.0, 0.0));
points->push_back (Gnome::Art::Point (13.0, 0.0));
points->push_back (Gnome::Art::Point (0.0, 13.0));
points->push_back (Gnome::Art::Point (0.0, 0.0));
_shift = 0;
label_offset = 13.0;
break;
case PunchOut:
points = new ArdourCanvas::Points ();
points->push_back (Gnome::Art::Point (0.0, 0.0));
points->push_back (Gnome::Art::Point (12.0, 0.0));
points->push_back (Gnome::Art::Point (12.0, 12.0));
points->push_back (Gnome::Art::Point (0.0, 0.0));
_shift = 13;
label_offset = 0.0;
break;
}
frame_position = frame;
unit_position = editor.frame_to_unit (frame);
/* adjust to properly locate the tip */
unit_position -= _shift;
group = new Group (parent, unit_position, 1.0);
mark = new Polygon (*group);
mark->property_points() = *points;
set_color_rgba (rgba);
mark->property_width_pixels() = 1;
/* setup name pixbuf sizes */
name_font = get_font_for_style (N_("MarkerText"));
Gtk::Label foo;
Glib::RefPtr<Pango::Layout> layout = foo.create_pango_layout (X_("Hg")); /* ascender + descender */
int width;
layout->set_font_description (*name_font);
Gtkmm2ext::get_ink_pixel_size (layout, width, name_height);
name_pixbuf = new ArdourCanvas::Pixbuf(*group);
name_pixbuf->property_x() = label_offset;
name_pixbuf->property_y() = (13/2) - (name_height/2);
set_name (annotation.c_str());
editor.ZoomChanged.connect (sigc::mem_fun (*this, &Marker::reposition));
mark->set_data ("marker", this);
if (handle_events) {
group->signal_event().connect (sigc::bind (sigc::mem_fun (editor, &PublicEditor::canvas_marker_event), mark, this));
}
}
Marker::~Marker ()
{
CatchDeletion (this); /* EMIT SIGNAL */
/* destroying the parent group destroys its contents, namely any polygons etc. that we added */
delete name_pixbuf;
delete mark;
delete points;
delete _line;
}
void Marker::reparent(ArdourCanvas::Group & parent)
{
group->reparent(parent);
_parent = &parent;
}
void
Marker::set_selected (bool s)
{
_selected = s;
setup_line ();
}
void
Marker::set_show_line (bool s)
{
_line_shown = s;
setup_line ();
}
void
Marker::setup_line ()
{
if (_shown && (_selected || _line_shown)) {
if (_line == 0) {
_line = new ArdourCanvas::SimpleLine (*_line_parent);
_line->property_color_rgba() = ARDOUR_UI::config()->canvasvar_EditPoint.get();
setup_line_x ();
_line->signal_event().connect (sigc::bind (sigc::mem_fun (editor, &PublicEditor::canvas_marker_event), mark, this));
}
double yo = 0;
if (!_selected) {
/* work out where to start the line from so that it extends only as far as the mark */
double x = 0;
_parent->i2w (x, yo);
_line_parent->w2i (x, yo);
}
_line->property_y1() = yo + 10;
_line->property_y2() = yo + 10 + _canvas_height;
_line->property_color_rgba() = _selected ? ARDOUR_UI::config()->canvasvar_EditPoint.get() : _color;
_line->raise_to_top ();
_line->show ();
} else {
if (_line) {
_line->hide ();
}
}
}
void
Marker::canvas_height_set (double h)
{
_canvas_height = h;
setup_line ();
}
ArdourCanvas::Item&
Marker::the_item() const
{
return *mark;
}
void
Marker::set_name (const string& new_name)
{
_name = new_name;
setup_name_pixbuf ();
}
/** @return true if our label is on the left of the mark, otherwise false */
bool
Marker::label_on_left () const
{
return (_type == SessionEnd || _type == RangeEnd || _type == LoopEnd || _type == PunchOut);
}
void
Marker::setup_name_pixbuf ()
{
double limit = DBL_MAX;
if (label_on_left ()) {
limit = _left_label_limit;
} else {
limit = _right_label_limit;
}
/* Work out how wide the name can be */
int name_width = min ((double) pixel_width (_name, *name_font) + 2, limit);
if (name_width == 0) {
name_width = 1;
}
if (label_on_left ()) {
name_pixbuf->property_x() = -name_width;
}
name_pixbuf->property_pixbuf() = pixbuf_from_string (_name, name_font, name_width, name_height, Gdk::Color ("#000000"));
}
void
Marker::setup_line_x ()
{
if (_line) {
_line->property_x1() = unit_position + _shift - 0.5;
_line->property_x2() = unit_position + _shift - 0.5;
}
}
void
Marker::set_position (framepos_t frame)
{
double new_unit_position = editor.frame_to_unit (frame);
new_unit_position -= _shift;
group->move (new_unit_position - unit_position, 0.0);
frame_position = frame;
unit_position = new_unit_position;
setup_line_x ();
}
void
Marker::reposition ()
{
set_position (frame_position);
}
void
Marker::show ()
{
_shown = true;
group->show ();
setup_line ();
}
void
Marker::hide ()
{
_shown = false;
group->hide ();
setup_line ();
}
void
Marker::set_color_rgba (uint32_t c)
{
_color = c;
mark->property_fill_color_rgba() = _color;
mark->property_outline_color_rgba() = _color;
if (_line && !_selected) {
_line->property_color_rgba() = _color;
}
}
/** Set the number of pixels that are available for a label to the left of the centre of this marker */
void
Marker::set_left_label_limit (double p)
{
/* Account for the size of the marker */
_left_label_limit = p - 13;
if (_left_label_limit < 0) {
_left_label_limit = 0;
}
if (label_on_left ()) {
setup_name_pixbuf ();
}
}
/** Set the number of pixels that are available for a label to the right of the centre of this marker */
void
Marker::set_right_label_limit (double p)
{
/* Account for the size of the marker */
_right_label_limit = p - 13;
if (_right_label_limit < 0) {
_right_label_limit = 0;
}
if (!label_on_left ()) {
setup_name_pixbuf ();
}
}
/***********************************************************************/
TempoMarker::TempoMarker (PublicEditor& editor, ArdourCanvas::Group& parent, ArdourCanvas::Group& line_parent, guint32 rgba, const string& text,
ARDOUR::TempoSection& temp)
: Marker (editor, parent, line_parent, rgba, text, Tempo, 0, false),
_tempo (temp)
{
set_position (_tempo.frame());
group->signal_event().connect (sigc::bind (sigc::mem_fun (editor, &PublicEditor::canvas_tempo_marker_event), mark, this));
}
TempoMarker::~TempoMarker ()
{
}
/***********************************************************************/
MeterMarker::MeterMarker (PublicEditor& editor, ArdourCanvas::Group& parent, ArdourCanvas::Group& line_parent, guint32 rgba, const string& text,
ARDOUR::MeterSection& m)
: Marker (editor, parent, line_parent, rgba, text, Meter, 0, false),
_meter (m)
{
set_position (_meter.frame());
group->signal_event().connect (sigc::bind (sigc::mem_fun (editor, &PublicEditor::canvas_meter_marker_event), mark, this));
}
MeterMarker::~MeterMarker ()
{
}
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