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livetrax/gtk2_ardour/time_axis_view_item.h
Paul Davis 6a5d805b38 more canvas refactoring.
Remove Canvas::Layout, use Canvas::Container for the same purpose, move child-rendering into Item::render_children() so that it
could theoretically be used by any derived type.
2014-06-22 11:41:05 -04:00

271 lines
8.0 KiB
C++

/*
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.
*/
#ifndef __gtk_ardour_time_axis_view_item_h__
#define __gtk_ardour_time_axis_view_item_h__
#include <string>
#include <gdk/gdk.h>
#include <gdkmm/color.h>
#include <pangomm/fontdescription.h>
#include "pbd/signals.h"
#include "selectable.h"
class TimeAxisView;
namespace ArdourCanvas {
class Pixbuf;
class Rectangle;
class Item;
class Container;
class Text;
}
using ARDOUR::framepos_t;
using ARDOUR::framecnt_t;
/**
* Base class for items that may appear upon a TimeAxisView.
*/
class TimeAxisViewItem : public Selectable, public PBD::ScopedConnectionList
{
public:
virtual ~TimeAxisViewItem();
virtual bool set_position(framepos_t, void*, double* delta = 0);
framepos_t get_position() const;
virtual bool set_duration(framecnt_t, void*);
framecnt_t get_duration() const;
virtual void set_max_duration(framecnt_t, void*);
framecnt_t get_max_duration() const;
virtual void set_min_duration(framecnt_t, void*);
framecnt_t get_min_duration() const;
virtual void set_position_locked(bool, void*);
bool get_position_locked() const;
void set_max_duration_active(bool, void*);
bool get_max_duration_active() const;
void set_min_duration_active(bool, void*);
bool get_min_duration_active() const;
void set_item_name(std::string, void*);
virtual std::string get_item_name() const;
virtual void set_selected(bool yn);
void set_sensitive (bool yn) { _sensitive = yn; }
bool sensitive () const { return _sensitive; }
TimeAxisView& get_time_axis_view () const;
void set_name_text(const std::string&);
virtual void set_height(double h);
virtual double height() const { return _height; }
void set_y (double);
void set_color (uint32_t);
void set_name_text_color ();
uint32_t get_fill_color () const;
ArdourCanvas::Item* get_canvas_frame();
ArdourCanvas::Item* get_canvas_group();
ArdourCanvas::Item* get_name_highlight();
virtual void set_samples_per_pixel (double);
double get_samples_per_pixel () const;
virtual void drag_start();
virtual void drag_end();
bool dragging() const { return _dragging; }
virtual void raise () { return; }
virtual void raise_to_top () { return; }
virtual void lower () { return; }
virtual void lower_to_bottom () { return; }
virtual void hide_rect ();
virtual void show_rect ();
/** @return true if the name area should respond to events */
bool name_active() const { return name_connected; }
// Default sizes, font and spacing
static Pango::FontDescription NAME_FONT;
static void set_constant_heights ();
static const double NAME_X_OFFSET;
static const double GRAB_HANDLE_TOP;
static const double GRAB_HANDLE_WIDTH;
/* these are not constant, but vary with the pixel size
of the font used to display the item name.
*/
static int NAME_HEIGHT;
static double NAME_Y_OFFSET;
static double NAME_HIGHLIGHT_SIZE;
static double NAME_HIGHLIGHT_THRESH;
/* if this is 1.0, we move the right boundary
of the item frame so that it is 1 pixel
after the end of the item. This gives nice
effects when splitting items.
if this is zero, the right edge coincides
with the end of the item, and things don't
look so nice.
this exists to allow easy debugging of the
two scenarios.
*/
static const double RIGHT_EDGE_SHIFT;
/**
* Emitted when this Group has been removed.
* This is different to the CatchDeletion signal in that this signal
* is emitted during the deletion of this Time Axis, and not during
* the destructor, this allows us to capture the source of the deletion
* event
*/
sigc::signal<void,std::string,void*> ItemRemoved;
/** Emitted when the name of this item is changed */
sigc::signal<void,std::string,std::string,void*> NameChanged;
/** Emiited when the position of this item changes */
sigc::signal<void,framepos_t,void*> PositionChanged;
/** Emitted when the position lock of this item is changed */
sigc::signal<void,bool,void*> PositionLockChanged;
/** Emitted when the duration of this item changes */
sigc::signal<void,framecnt_t,void*> DurationChanged;
/** Emitted when the maximum item duration is changed */
sigc::signal<void,framecnt_t,void*> MaxDurationChanged;
/** Emitted when the mionimum item duration is changed */
sigc::signal<void,framecnt_t,void*> MinDurationChanged;
enum Visibility {
ShowFrame = 0x1,
ShowNameHighlight = 0x2,
ShowNameText = 0x4,
ShowHandles = 0x8,
HideFrameLeft = 0x10,
HideFrameRight = 0x20,
HideFrameTB = 0x40,
FullWidthNameHighlight = 0x80
};
protected:
TimeAxisViewItem (const std::string &, ArdourCanvas::Item&, TimeAxisView&, double, uint32_t fill_color,
framepos_t, framecnt_t, bool recording = false, bool automation = false, Visibility v = Visibility (0));
TimeAxisViewItem (const TimeAxisViewItem&);
void init (ArdourCanvas::Item*, double, uint32_t, framepos_t, framepos_t, Visibility, bool, bool);
virtual bool canvas_group_event (GdkEvent*);
virtual void set_colors();
virtual void set_frame_color();
virtual void set_frame_gradient ();
void set_trim_handle_colors();
virtual void reset_width_dependent_items (double);
static gint idle_remove_this_item(TimeAxisViewItem*, void*);
/** time axis that this item is on */
TimeAxisView& trackview;
/** indicates whether this item is locked to its current position */
bool position_locked;
/** position of this item on the timeline */
framepos_t frame_position;
/** duration of this item upon the timeline */
framecnt_t item_duration;
/** maximum duration that this item can have */
framecnt_t max_item_duration;
/** minimum duration that this item can have */
framecnt_t min_item_duration;
/** indicates whether the max duration constraint is active */
bool max_duration_active;
/** indicates whether the min duration constraint is active */
bool min_duration_active;
/** frames per canvas pixel */
double samples_per_pixel;
/** should the item respond to events */
bool _sensitive;
/**
* The unique item name of this Item.
* Each item upon a time axis must have a unique id.
*/
std::string item_name;
/** true if the name should respond to events */
bool name_connected;
/** true if a small vestigial rect should be shown when the item gets very narrow */
bool show_vestigial;
uint32_t fill_color;
virtual uint32_t fill_opacity() const;
uint32_t last_item_width;
int name_text_width;
bool wide_enough_for_name;
bool high_enough_for_name;
bool rect_visible;
ArdourCanvas::Container* group;
ArdourCanvas::Rectangle* vestigial_frame;
ArdourCanvas::Rectangle* frame;
ArdourCanvas::Text* name_text;
ArdourCanvas::Rectangle* name_highlight;
/* with these two values, if frame_handle_start == 0 then frame_handle_end will also be 0 */
ArdourCanvas::Rectangle* frame_handle_start; ///< `frame' (fade) handle for the start of the item, or 0
ArdourCanvas::Rectangle* frame_handle_end; ///< `frame' (fade) handle for the end of the item, or 0
bool frame_handle_crossing (GdkEvent*, ArdourCanvas::Rectangle*);
double _height;
Visibility visibility;
bool _recregion;
bool _automation; ///< true if this is an automation region view
bool _dragging;
private:
double _width;
void parameter_changed (std::string);
void manage_name_highlight ();
void manage_name_text ();
}; /* class TimeAxisViewItem */
#endif /* __gtk_ardour_time_axis_view_item_h__ */