ardour/livetrax
13
0
Fork 0
Code
ac33bb4256
livetrax/gtk2_ardour/time_axis_view_item.cc

1047 lines
26 KiB
C++
Raw Blame History

/*
Copyright (C) 2003 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 <utility>
#include "pbd/error.h"
#include "pbd/stacktrace.h"
#include "ardour/types.h"
#include "ardour/ardour.h"
#include "gtkmm2ext/utils.h"
#include "gtkmm2ext/gui_thread.h"
#include "canvas/group.h"
#include "canvas/rectangle.h"
#include "canvas/debug.h"
#include "canvas/drag_handle.h"
#include "canvas/text.h"
#include "canvas/utils.h"
#include "ardour/profile.h"
#include "ardour_ui.h"
/*
* ardour_ui.h was moved up in the include list
* due to a conflicting definition of 'Rect' between
* Apple's MacTypes.h file and GTK
*/
#include "public_editor.h"
#include "time_axis_view_item.h"
#include "time_axis_view.h"
#include "utils.h"
#include "rgb_macros.h"
#include "i18n.h"
using namespace std;
using namespace Editing;
using namespace Glib;
using namespace PBD;
using namespace ARDOUR;
using namespace Gtkmm2ext;
Pango::FontDescription TimeAxisViewItem::NAME_FONT;
const double TimeAxisViewItem::NAME_X_OFFSET = 15.0;
const double TimeAxisViewItem::GRAB_HANDLE_TOP = 0.0;
const double TimeAxisViewItem::GRAB_HANDLE_WIDTH = 10.0;
const double TimeAxisViewItem::RIGHT_EDGE_SHIFT = 1.0;
int TimeAxisViewItem::NAME_HEIGHT;
double TimeAxisViewItem::NAME_Y_OFFSET;
double TimeAxisViewItem::NAME_HIGHLIGHT_SIZE;
double TimeAxisViewItem::NAME_HIGHLIGHT_THRESH;
void
TimeAxisViewItem::set_constant_heights ()
{
NAME_FONT = get_font_for_style (X_("TimeAxisViewItemName"));
Gtk::Window win;
Gtk::Label foo;
win.add (foo);
Glib::RefPtr<Pango::Layout> layout = foo.create_pango_layout (X_("Hg")); /* ascender + descender */
int width = 0;
int height = 0;
layout->set_font_description (NAME_FONT);
get_pixel_size (layout, width, height);
layout = foo.create_pango_layout (X_("H")); /* just the ascender */
NAME_HEIGHT = height;
/* Config->get_show_name_highlight) == true:
Y_OFFSET is measured from bottom of the time axis view item.
Config->get_show_name_highlight) == false:
Y_OFFSET is measured from the top of the time axis view item.
*/
if (Config->get_show_name_highlight()) {
NAME_Y_OFFSET = height + 1;
NAME_HIGHLIGHT_SIZE = height + 2;
} else {
NAME_Y_OFFSET = 3;
NAME_HIGHLIGHT_SIZE = 0;
}
NAME_HIGHLIGHT_THRESH = NAME_HIGHLIGHT_SIZE * 3;
}
/**
* Construct a new TimeAxisViewItem.
*
* @param it_name the unique name of this item
* @param parent the parent canvas group
* @param tv the TimeAxisView we are going to be added to
* @param spu samples per unit
* @param base_color
* @param start the start point of this item
* @param duration the duration of this item
* @param recording true if this is a recording region view
* @param automation true if this is an automation region view
*/
TimeAxisViewItem::TimeAxisViewItem(
const string & it_name, ArdourCanvas::Group& parent, TimeAxisView& tv, double spu, Gdk::Color const & base_color,
framepos_t start, framecnt_t duration, bool recording, bool automation, Visibility vis
)
: trackview (tv)
, frame_position (-1)
, item_name (it_name)
, _height (1.0)
, _recregion (recording)
, _automation (automation)
, _dragging (false)
, _width (0.0)
{
init (&parent, spu, base_color, start, duration, vis, true, true);
}
TimeAxisViewItem::TimeAxisViewItem (const TimeAxisViewItem& other)
: trackable (other)
, Selectable (other)
, PBD::ScopedConnectionList()
, trackview (other.trackview)
, frame_position (-1)
, item_name (other.item_name)
, _height (1.0)
, _recregion (other._recregion)
, _automation (other._automation)
, _dragging (other._dragging)
, _width (0.0)
{
Gdk::Color c;
int r,g,b,a;
UINT_TO_RGBA (other.fill_color, &r, &g, &b, &a);
c.set_rgb_p (r/255.0, g/255.0, b/255.0);
/* share the other's parent, but still create a new group */
ArdourCanvas::Group* parent = other.group->parent();
_selected = other._selected;
init (parent, other.samples_per_pixel, c, other.frame_position,
other.item_duration, other.visibility, other.wide_enough_for_name, other.high_enough_for_name);
}
void
TimeAxisViewItem::init (ArdourCanvas::Group* parent, double fpp, Gdk::Color const & base_color,
framepos_t start, framepos_t duration, Visibility vis,
bool wide, bool high)
{
group = new ArdourCanvas::Group (parent);
CANVAS_DEBUG_NAME (group, string_compose ("TAVI group for %1", get_item_name()));
group->Event.connect (sigc::mem_fun (*this, &TimeAxisViewItem::canvas_group_event));
samples_per_pixel = fpp;
frame_position = start;
item_duration = duration;
name_connected = false;
fill_opacity = 60;
position_locked = false;
max_item_duration = ARDOUR::max_framepos;
min_item_duration = 0;
show_vestigial = true;
visibility = vis;
_sensitive = true;
name_text_width = 0;
last_item_width = 0;
wide_enough_for_name = wide;
high_enough_for_name = high;
rect_visible = true;
if (duration == 0) {
warning << "Time Axis Item Duration == 0" << endl;
}
vestigial_frame = new ArdourCanvas::Rectangle (group, ArdourCanvas::Rect (0.0, 1.0, 2.0, trackview.current_height()));
CANVAS_DEBUG_NAME (vestigial_frame, string_compose ("vestigial frame for %1", get_item_name()));
vestigial_frame->hide ();
vestigial_frame->set_outline_color (ARDOUR_UI::config()->get_canvasvar_VestigialFrame());
vestigial_frame->set_fill_color (ARDOUR_UI::config()->get_canvasvar_VestigialFrame());
if (visibility & ShowFrame) {
frame = new ArdourCanvas::Rectangle (group,
ArdourCanvas::Rect (0.0, 0.0,
trackview.editor().sample_to_pixel(duration) + RIGHT_EDGE_SHIFT,
trackview.current_height() - 1.0));
CANVAS_DEBUG_NAME (frame, string_compose ("frame for %1", get_item_name()));
if (Config->get_show_name_highlight()) {
frame->set_outline_what (ArdourCanvas::Rectangle::What (ArdourCanvas::Rectangle::LEFT|ArdourCanvas::Rectangle::RIGHT));
} else {
frame->set_outline_what (ArdourCanvas::Rectangle::What (ArdourCanvas::Rectangle::LEFT|ArdourCanvas::Rectangle::RIGHT|ArdourCanvas::Rectangle::BOTTOM));
}
if (_recregion) {
frame->set_outline_color (ARDOUR_UI::config()->get_canvasvar_RecordingRect());
} else {
frame->set_outline_color (ARDOUR_UI::config()->get_canvasvar_TimeAxisFrame());
}
} else {
frame = 0;
}
if (Config->get_show_name_highlight() && (visibility & ShowNameHighlight)) {
double width;
double start;
if (visibility & FullWidthNameHighlight) {
start = 0.0;
width = trackview.editor().sample_to_pixel(item_duration) + RIGHT_EDGE_SHIFT;
} else {
start = 1.0;
width = trackview.editor().sample_to_pixel(item_duration) - 2.0 + RIGHT_EDGE_SHIFT;
}
name_highlight = new ArdourCanvas::Rectangle (group,
ArdourCanvas::Rect (start,
trackview.current_height() - TimeAxisViewItem::NAME_HIGHLIGHT_SIZE,
width - 2.0 + RIGHT_EDGE_SHIFT,
trackview.current_height() - 1.0));
CANVAS_DEBUG_NAME (name_highlight, string_compose ("name highlight for %1", get_item_name()));
name_highlight->set_data ("timeaxisviewitem", this);
name_highlight->set_outline_what (ArdourCanvas::Rectangle::TOP);
name_highlight->set_outline_color (RGBA_TO_UINT (0,0,0,255));
} else {
name_highlight = 0;
}
if (visibility & ShowNameText) {
name_text = new ArdourCanvas::Text (group);
CANVAS_DEBUG_NAME (name_text, string_compose ("name text for %1", get_item_name()));
if (Config->get_show_name_highlight()) {
name_text->set_position (ArdourCanvas::Duple (NAME_X_OFFSET, trackview.current_height() - NAME_Y_OFFSET));
} else {
name_text->set_position (ArdourCanvas::Duple (NAME_X_OFFSET, NAME_Y_OFFSET));
}
name_text->set_font_description (NAME_FONT);
} else {
name_text = 0;
}
/* create our grab handles used for trimming/duration etc */
if (!_recregion && !_automation) {
double top = TimeAxisViewItem::GRAB_HANDLE_TOP;
double width = TimeAxisViewItem::GRAB_HANDLE_WIDTH;
frame_handle_start = new ArdourCanvas::DragHandle (group, ArdourCanvas::Rect (0.0, top, width, trackview.current_height()), true);
CANVAS_DEBUG_NAME (frame_handle_start, "TAVI frame handle start");
frame_handle_start->set_outline (false);
frame_handle_start->set_fill (false);
frame_handle_start->Event.connect (sigc::bind (sigc::mem_fun (*this, &TimeAxisViewItem::frame_handle_crossing), frame_handle_start));
frame_handle_end = new ArdourCanvas::DragHandle (group, ArdourCanvas::Rect (0.0, top, width, trackview.current_height()), false);
CANVAS_DEBUG_NAME (frame_handle_end, "TAVI frame handle end");
frame_handle_end->set_outline (false);
frame_handle_end->set_fill (false);
frame_handle_end->Event.connect (sigc::bind (sigc::mem_fun (*this, &TimeAxisViewItem::frame_handle_crossing), frame_handle_end));
} else {
frame_handle_start = frame_handle_end = 0;
}
set_color (base_color);
set_duration (item_duration, this);
set_position (start, this);
Config->ParameterChanged.connect (*this, invalidator (*this), boost::bind (&TimeAxisViewItem::parameter_changed, this, _1), gui_context ());
ARDOUR_UI::config()->ParameterChanged.connect (sigc::mem_fun (*this, &TimeAxisViewItem::parameter_changed));
}
TimeAxisViewItem::~TimeAxisViewItem()
{
delete group;
}
bool
TimeAxisViewItem::canvas_group_event (GdkEvent* /*ev*/)
{
return false;
}
void
TimeAxisViewItem::hide_rect ()
{
rect_visible = false;
set_frame_color ();
if (name_highlight) {
name_highlight->set_outline_what (ArdourCanvas::Rectangle::What (0));
name_highlight->set_fill_color (UINT_RGBA_CHANGE_A (fill_color, 64));
}
}
void
TimeAxisViewItem::show_rect ()
{
rect_visible = true;
set_frame_color ();
if (name_highlight) {
name_highlight->set_outline_what (ArdourCanvas::Rectangle::TOP);
name_highlight->set_fill_color (fill_color);
}
}
/**
* Set the position of this item on the timeline.
*
* @param pos the new position
* @param src the identity of the object that initiated the change
* @return true on success
*/
bool
TimeAxisViewItem::set_position(framepos_t pos, void* src, double* delta)
{
if (position_locked) {
return false;
}
frame_position = pos;
double new_unit_pos = trackview.editor().sample_to_pixel (pos);
if (delta) {
(*delta) = new_unit_pos - group->position().x;
if (*delta == 0.0) {
return true;
}
} else {
if (new_unit_pos == group->position().x) {
return true;
}
}
group->set_x_position (new_unit_pos);
PositionChanged (frame_position, src); /* EMIT_SIGNAL */
return true;
}
/** @return position of this item on the timeline */
framepos_t
TimeAxisViewItem::get_position() const
{
return frame_position;
}
/**
* Set the duration of this item.
*
* @param dur the new duration of this item
* @param src the identity of the object that initiated the change
* @return true on success
*/
bool
TimeAxisViewItem::set_duration (framecnt_t dur, void* src)
{
if ((dur > max_item_duration) || (dur < min_item_duration)) {
warning << string_compose (
P_("new duration %1 frame is out of bounds for %2", "new duration of %1 frames is out of bounds for %2", dur),
get_item_name(), dur)
<< endmsg;
return false;
}
if (dur == 0) {
group->hide();
}
item_duration = dur;
reset_width_dependent_items (trackview.editor().sample_to_pixel (dur));
DurationChanged (dur, src); /* EMIT_SIGNAL */
return true;
}
/** @return duration of this item */
framepos_t
TimeAxisViewItem::get_duration() const
{
return item_duration;
}
/**
* Set the maximum duration that this item can have.
*
* @param dur the new maximum duration
* @param src the identity of the object that initiated the change
*/
void
TimeAxisViewItem::set_max_duration(framecnt_t dur, void* src)
{
max_item_duration = dur;
MaxDurationChanged(max_item_duration, src); /* EMIT_SIGNAL */
}
/** @return the maximum duration that this item may have */
framecnt_t
TimeAxisViewItem::get_max_duration() const
{
return max_item_duration;
}
/**
* Set the minimum duration that this item may have.
*
* @param the minimum duration that this item may be set to
* @param src the identity of the object that initiated the change
*/
void
TimeAxisViewItem::set_min_duration(framecnt_t dur, void* src)
{
min_item_duration = dur;
MinDurationChanged(max_item_duration, src); /* EMIT_SIGNAL */
}
/** @return the minimum duration that this item mey have */
framecnt_t
TimeAxisViewItem::get_min_duration() const
{
return min_item_duration;
}
/**
* Set whether this item is locked to its current position.
* Locked items cannot be moved until the item is unlocked again.
*
* @param yn true to lock this item to its current position
* @param src the identity of the object that initiated the change
*/
void
TimeAxisViewItem::set_position_locked(bool yn, void* src)
{
position_locked = yn;
set_trim_handle_colors();
PositionLockChanged (position_locked, src); /* EMIT_SIGNAL */
}
/** @return true if this item is locked to its current position */
bool
TimeAxisViewItem::get_position_locked() const
{
return position_locked;
}
/**
* Set whether the maximum duration constraint is active.
*
* @param active set true to enforce the max duration constraint
* @param src the identity of the object that initiated the change
*/
void
TimeAxisViewItem::set_max_duration_active (bool active, void* /*src*/)
{
max_duration_active = active;
}
/** @return true if the maximum duration constraint is active */
bool
TimeAxisViewItem::get_max_duration_active() const
{
return max_duration_active;
}
/**
* Set whether the minimum duration constraint is active.
*
* @param active set true to enforce the min duration constraint
* @param src the identity of the object that initiated the change
*/
void
TimeAxisViewItem::set_min_duration_active (bool active, void* /*src*/)
{
min_duration_active = active;
}
/** @return true if the maximum duration constraint is active */
bool
TimeAxisViewItem::get_min_duration_active() const
{
return min_duration_active;
}
/**
* Set the name of this item.
*
* @param new_name the new name of this item
* @param src the identity of the object that initiated the change
*/
void
TimeAxisViewItem::set_item_name(std::string new_name, void* src)
{
if (new_name != item_name) {
std::string temp_name = item_name;
item_name = new_name;
NameChanged (item_name, temp_name, src); /* EMIT_SIGNAL */
}
}
/** @return the name of this item */
std::string
TimeAxisViewItem::get_item_name() const
{
return item_name;
}
/**
* Set selection status.
*
* @param yn true if this item is currently selected
*/
void
TimeAxisViewItem::set_selected(bool yn)
{
if (_selected != yn) {
Selectable::set_selected (yn);
set_frame_color ();
}
}
/** @return the TimeAxisView that this item is on */
TimeAxisView&
TimeAxisViewItem::get_time_axis_view () const
{
return trackview;
}
/**
* Set the displayed item text.
* This item is the visual text name displayed on the canvas item, this can be different to the name of the item.
*
* @param new_name the new name text to display
*/
void
TimeAxisViewItem::set_name_text(const string& new_name)
{
if (!name_text) {
return;
}
name_text_width = pixel_width (new_name, NAME_FONT) + 2;
name_text->set (new_name);
}
/**
* Set the height of this item.
*
* @param h new height
*/
void
TimeAxisViewItem::set_height (double height)
{
_height = height;
manage_name_highlight ();
if (visibility & ShowNameText) {
if (Config->get_show_name_highlight()) {
name_text->set_y_position (height - NAME_Y_OFFSET);
} else {
name_text->set_y_position (NAME_Y_OFFSET);
}
}
if (frame) {
frame->set_y1 (height);
if (frame_handle_start) {
frame_handle_start->set_y1 (height);
frame_handle_end->set_y1 (height);
}
}
vestigial_frame->set_y1 (height - 1.0);
set_colors ();
}
void
TimeAxisViewItem::manage_name_highlight ()
{
if (!name_highlight) {
return;
}
if (_height < NAME_HIGHLIGHT_THRESH) {
high_enough_for_name = false;
} else {
high_enough_for_name = true;
}
if (_width < 2.0) {
wide_enough_for_name = false;
} else {
wide_enough_for_name = true;
}
if (name_highlight && wide_enough_for_name && high_enough_for_name) {
name_highlight->show();
name_highlight->set (ArdourCanvas::Rect (0.0, (double) _height - NAME_HIGHLIGHT_SIZE, _width+RIGHT_EDGE_SHIFT, (double) _height - 1.0));
} else {
name_highlight->hide();
}
manage_name_text ();
}
void
TimeAxisViewItem::set_color (Gdk::Color const & base_color)
{
compute_colors (base_color);
set_colors ();
}
ArdourCanvas::Item*
TimeAxisViewItem::get_canvas_frame()
{
return frame;
}
ArdourCanvas::Group*
TimeAxisViewItem::get_canvas_group()
{
return group;
}
ArdourCanvas::Item*
TimeAxisViewItem::get_name_highlight()
{
return name_highlight;
}
/**
* Calculate some contrasting color for displaying various parts of this item, based upon the base color.
*
* @param color the base color of the item
*/
void
TimeAxisViewItem::compute_colors (Gdk::Color const & base_color)
{
unsigned char r,g,b;
/* FILL: change opacity to a fixed value */
r = base_color.get_red()/256;
g = base_color.get_green()/256;
b = base_color.get_blue()/256;
fill_color = RGBA_TO_UINT(r,g,b,160);
}
/**
* Convenience method to set the various canvas item colors
*/
void
TimeAxisViewItem::set_colors()
{
set_frame_color();
if (name_highlight) {
name_highlight->set_fill_color (fill_color);
}
set_name_text_color ();
set_trim_handle_colors();
}
void
TimeAxisViewItem::set_name_text_color ()
{
if (!name_text) {
return;
}
double r, g, b, a;
const double black_r = 0.0;
const double black_g = 0.0;
const double black_b = 0.0;
const double white_r = 1.0;
const double white_g = 1.0;
const double white_b = 1.0;
uint32_t f;
if (Config->get_show_name_highlight()) {
/* name text will always be on top of name highlight, which
will always use our fill color.
*/
f = fill_color;
} else {
/* name text will be on top of the item, whose color
may vary depending on various conditions.
*/
f = get_fill_color ();
}
ArdourCanvas::color_to_rgba (f, r, g, b, a);
/* Use W3C contrast guideline calculation */
double white_contrast = (max (r, white_r) - min (r, white_r)) +
(max (g, white_g) - min (g, white_g)) +
(max (b, white_b) - min (b, white_b));
double black_contrast = (max (r, black_r) - min (r, black_r)) +
(max (g, black_g) - min (g, black_g)) +
(max (b, black_b) - min (b, black_b));
if (white_contrast > black_contrast) {
/* use white */
name_text->set_color (ArdourCanvas::rgba_to_color (1.0, 1.0, 1.0, 1.0));
} else {
/* use black */
name_text->set_color (ArdourCanvas::rgba_to_color (0.0, 0.0, 0.0, 1.0));
}
}
uint32_t
TimeAxisViewItem::get_fill_color () const
{
uint32_t f;
uint32_t o;
if (_selected) {
f = ARDOUR_UI::config()->get_canvasvar_SelectedFrameBase();
if (fill_opacity != 0) {
o = fill_opacity;
} else {
/* some condition of this item has set fill opacity to
* zero, but it has been selected, so use a mid-way
* alpha value to make it reasonably visible.
*/
o = 130;
}
} else {
if (_recregion) {
f = ARDOUR_UI::config()->get_canvasvar_RecordingRect();
} else {
if (high_enough_for_name && !ARDOUR_UI::config()->get_color_regions_using_track_color()) {
f = ARDOUR_UI::config()->get_canvasvar_FrameBase();
} else {
f = fill_color;
}
}
/* tweak opacity */
if (!rect_visible) {
o = 0;
} else {
o = fill_opacity;
}
}
return UINT_RGBA_CHANGE_A (f, o);
}
/**
* Sets the frame color depending on whether this item is selected
*/
void
TimeAxisViewItem::set_frame_color()
{
if (!frame) {
return;
}
frame->set_fill_color (get_fill_color());
set_frame_gradient ();
if (!_recregion) {
uint32_t f;
if (_selected) {
f = ARDOUR_UI::config()->get_canvasvar_SelectedTimeAxisFrame();
} else {
f = ARDOUR_UI::config()->get_canvasvar_TimeAxisFrame();
}
if (!rect_visible) {
/* make the frame outline be visible but rather transparent */
f = UINT_RGBA_CHANGE_A (f, 64);
}
frame->set_outline_color (f);
}
}
void
TimeAxisViewItem::set_frame_gradient ()
{
if (ARDOUR_UI::config()->get_timeline_item_gradient_depth() == 0.0) {
frame->set_gradient (ArdourCanvas::Fill::StopList (), 0);
return;
}
ArdourCanvas::Fill::StopList stops;
double r, g, b, a;
double h, s, v;
ArdourCanvas::Color f (get_fill_color());
/* need to get alpha value */
ArdourCanvas::color_to_rgba (f, r, g, b, a);
stops.push_back (std::make_pair (0.0, f));
/* now a darker version */
ArdourCanvas::color_to_hsv (f, h, s, v);
v = min (1.0, v * (1.0 - ARDOUR_UI::config()->get_timeline_item_gradient_depth()));
ArdourCanvas::Color darker = ArdourCanvas::hsv_to_color (h, s, v, a);
stops.push_back (std::make_pair (1.0, darker));
frame->set_gradient (stops, true);
}
/**
* Set the colors of the start and end trim handle depending on object state
*/
void
TimeAxisViewItem::set_trim_handle_colors()
{
#if 1
/* Leave them transparent for now */
if (frame_handle_start) {
frame_handle_start->set_fill_color (0x00000000);
frame_handle_end->set_fill_color (0x00000000);
}
#else
if (frame_handle_start) {
if (position_locked) {
frame_handle_start->set_fill_color (ARDOUR_UI::config()->get_canvasvar_TrimHandleLocked());
frame_handle_end->set_fill_color (ARDOUR_UI::config()->get_canvasvar_TrimHandleLocked());
} else {
frame_handle_start->set_fill_color (ARDOUR_UI::config()->get_canvasvar_TrimHandle());
frame_handle_end->set_fill_color (ARDOUR_UI::config()->get_canvasvar_TrimHandle());
}
}
#endif
}
bool
TimeAxisViewItem::frame_handle_crossing (GdkEvent* ev, ArdourCanvas::Rectangle* item)
{
switch (ev->type) {
case GDK_LEAVE_NOTIFY:
/* always hide the handle whenever we leave, no matter what mode */
item->set_fill (false);
break;
case GDK_ENTER_NOTIFY:
if (trackview.editor().effective_mouse_mode() == Editing::MouseObject &&
!trackview.editor().internal_editing()) {
/* never set this to be visible in internal
edit mode. Note, however, that we do need to
undo visibility (LEAVE_NOTIFY case above) no
matter what the mode is.
*/
item->set_fill (true);
}
break;
default:
break;
}
return false;
}
/** @return the frames per pixel */
double
TimeAxisViewItem::get_samples_per_pixel () const
{
return samples_per_pixel;
}
/** Set the frames per pixel of this item.
* This item is used to determine the relative visual size and position of this item
* based upon its duration and start value.
*
* @param fpp the new frames per pixel
*/
void
TimeAxisViewItem::set_samples_per_pixel (double fpp)
{
samples_per_pixel = fpp;
set_position (this->get_position(), this);
reset_width_dependent_items ((double) get_duration() / samples_per_pixel);
}
void
TimeAxisViewItem::reset_width_dependent_items (double pixel_width)
{
_width = pixel_width;
manage_name_highlight ();
if (pixel_width < 2.0) {
if (show_vestigial) {
vestigial_frame->show();
}
if (frame) {
frame->hide();
}
if (frame_handle_start) {
frame_handle_start->hide();
frame_handle_end->hide();
}
} else {
vestigial_frame->hide();
if (frame) {
frame->show();
frame->set_x1 (pixel_width + RIGHT_EDGE_SHIFT);
}
if (frame_handle_start) {
if (pixel_width < (3 * TimeAxisViewItem::GRAB_HANDLE_WIDTH)) {
/*
* there's less than GRAB_HANDLE_WIDTH of the region between
* the right-hand end of frame_handle_start and the left-hand
* end of frame_handle_end, so disable the handles
*/
frame_handle_start->hide();
frame_handle_end->hide();
} else {
frame_handle_start->show();
frame_handle_end->set_x0 (pixel_width + RIGHT_EDGE_SHIFT - (TimeAxisViewItem::GRAB_HANDLE_WIDTH));
frame_handle_end->set_x1 (pixel_width + RIGHT_EDGE_SHIFT);
frame_handle_end->show();
}
}
}
}
void
TimeAxisViewItem::manage_name_text ()
{
int visible_name_width;
if (!name_text) {
return;
}
if (!wide_enough_for_name || !high_enough_for_name) {
name_text->hide ();
return;
}
if (name_text->text().empty()) {
name_text->hide ();
}
visible_name_width = name_text_width;
if (visible_name_width > _width - NAME_X_OFFSET) {
visible_name_width = _width - NAME_X_OFFSET;
}
if (visible_name_width < 1) {
name_text->hide ();
} else {
name_text->clamp_width (visible_name_width);
name_text->show ();
}
}
/**
* Callback used to remove this time axis item during the gtk idle loop.
* This is used to avoid deleting the obejct while inside the remove_this_item
* method.
*
* @param item the TimeAxisViewItem to remove.
* @param src the identity of the object that initiated the change.
*/
gint
TimeAxisViewItem::idle_remove_this_item(TimeAxisViewItem* item, void* src)
{
item->ItemRemoved (item->get_item_name(), src); /* EMIT_SIGNAL */
delete item;
item = 0;
return false;
}
void
TimeAxisViewItem::set_y (double y)
{
group->set_y_position (y);
}
void
TimeAxisViewItem::parameter_changed (string p)
{
if (p == "color-regions-using-track-color") {
set_colors ();
} else if (p == "timeline-item-gradient-depth") {
set_frame_gradient ();
}
}
View Git Blame Copy Permalink