2 Copyright (C) 2003 Paul Davis
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 #ifndef __gtk_ardour_time_axis_view_item_h__
21 #define __gtk_ardour_time_axis_view_item_h__
24 #include <gdkmm/color.h>
25 #include <pangomm/fontdescription.h>
26 #include "pbd/signals.h"
27 #include "selectable.h"
31 namespace ArdourCanvas {
39 using ARDOUR::framepos_t;
40 using ARDOUR::framecnt_t;
43 * Base class for items that may appear upon a TimeAxisView.
46 class TimeAxisViewItem : public Selectable, public PBD::ScopedConnectionList
49 virtual ~TimeAxisViewItem();
51 virtual bool set_position(framepos_t, void*, double* delta = 0);
52 framepos_t get_position() const;
53 virtual bool set_duration(framecnt_t, void*);
54 framecnt_t get_duration() const;
55 virtual void set_max_duration(framecnt_t, void*);
56 framecnt_t get_max_duration() const;
57 virtual void set_min_duration(framecnt_t, void*);
58 framecnt_t get_min_duration() const;
59 virtual void set_position_locked(bool, void*);
60 bool get_position_locked() const;
61 void set_max_duration_active(bool, void*);
62 bool get_max_duration_active() const;
63 void set_min_duration_active(bool, void*);
64 bool get_min_duration_active() const;
65 void set_item_name(std::string, void*);
66 virtual std::string get_item_name() const;
67 virtual void set_selected(bool yn);
68 void set_sensitive (bool yn) { _sensitive = yn; }
69 bool sensitive () const { return _sensitive; }
70 TimeAxisView& get_time_axis_view () const;
71 void set_name_text(const std::string&);
72 virtual void set_height(double h);
74 void set_color (Gdk::Color const &);
76 ArdourCanvas::Item* get_canvas_frame();
77 ArdourCanvas::Group* get_canvas_group();
78 ArdourCanvas::Item* get_name_highlight();
80 virtual void set_samples_per_pixel (double);
82 double get_samples_per_pixel () const;
84 virtual void drag_start() { _dragging = true; }
85 virtual void drag_end() { _dragging = false; }
86 bool dragging() const { return _dragging; }
88 virtual void raise () { return; }
89 virtual void raise_to_top () { return; }
90 virtual void lower () { return; }
91 virtual void lower_to_bottom () { return; }
93 virtual void hide_rect ();
94 virtual void show_rect ();
96 /** @return true if the name area should respond to events */
97 bool name_active() const { return name_connected; }
99 // Default sizes, font and spacing
100 static Pango::FontDescription NAME_FONT;
101 static void set_constant_heights ();
102 static const double NAME_X_OFFSET;
103 static const double GRAB_HANDLE_TOP;
104 static const double GRAB_HANDLE_WIDTH;
106 /* these are not constant, but vary with the pixel size
107 of the font used to display the item name.
109 static int NAME_HEIGHT;
110 static double NAME_Y_OFFSET;
111 static double NAME_HIGHLIGHT_SIZE;
112 static double NAME_HIGHLIGHT_THRESH;
115 * Emitted when this Group has been removed.
116 * This is different to the CatchDeletion signal in that this signal
117 * is emitted during the deletion of this Time Axis, and not during
118 * the destructor, this allows us to capture the source of the deletion
122 sigc::signal<void,std::string,void*> ItemRemoved;
124 /** Emitted when the name of this item is changed */
125 sigc::signal<void,std::string,std::string,void*> NameChanged;
127 /** Emiited when the position of this item changes */
128 sigc::signal<void,framepos_t,void*> PositionChanged;
130 /** Emitted when the position lock of this item is changed */
131 sigc::signal<void,bool,void*> PositionLockChanged;
133 /** Emitted when the duration of this item changes */
134 sigc::signal<void,framecnt_t,void*> DurationChanged;
136 /** Emitted when the maximum item duration is changed */
137 sigc::signal<void,framecnt_t,void*> MaxDurationChanged;
139 /** Emitted when the mionimum item duration is changed */
140 sigc::signal<void,framecnt_t,void*> MinDurationChanged;
144 ShowNameHighlight = 0x2,
147 HideFrameLeft = 0x10,
148 HideFrameRight = 0x20,
150 FullWidthNameHighlight = 0x80
154 TimeAxisViewItem(const std::string &, ArdourCanvas::Group&, TimeAxisView&, double, Gdk::Color const &,
155 framepos_t, framecnt_t, bool recording = false, bool automation = false, Visibility v = Visibility (0));
157 TimeAxisViewItem (const TimeAxisViewItem&);
159 void init (const std::string&, double, Gdk::Color const &, framepos_t, framepos_t, Visibility, bool, bool);
161 virtual void compute_colors (Gdk::Color const &);
162 virtual void set_colors();
163 virtual void set_frame_color();
164 void set_trim_handle_colors();
166 virtual void reset_width_dependent_items (double);
167 void reset_name_width (double);
168 void update_name_text_visibility ();
170 static gint idle_remove_this_item(TimeAxisViewItem*, void*);
172 /** time axis that this item is on */
173 TimeAxisView& trackview;
175 /** indicates whether this item is locked to its current position */
176 bool position_locked;
178 /** position of this item on the timeline */
179 framepos_t frame_position;
181 /** duration of this item upon the timeline */
182 framecnt_t item_duration;
184 /** maximum duration that this item can have */
185 framecnt_t max_item_duration;
187 /** minimum duration that this item can have */
188 framecnt_t min_item_duration;
190 /** indicates whether the max duration constraint is active */
191 bool max_duration_active;
193 /** indicates whether the min duration constraint is active */
194 bool min_duration_active;
196 /** frames per canvas pixel */
197 double samples_per_pixel;
199 /** should the item respond to events */
203 * The unique item name of this Item.
204 * Each item upon a time axis must have a unique id.
206 std::string item_name;
208 /** true if the name should respond to events */
211 /** true if a small vestigial rect should be shown when the item gets very narrow */
214 uint32_t fill_opacity;
216 uint32_t frame_color_r;
217 uint32_t frame_color_g;
218 uint32_t frame_color_b;
219 uint32_t selected_frame_color_r;
220 uint32_t selected_frame_color_g;
221 uint32_t selected_frame_color_b;
222 uint32_t label_color;
224 uint32_t handle_color_r;
225 uint32_t handle_color_g;
226 uint32_t handle_color_b;
227 uint32_t lock_handle_color_r;
228 uint32_t lock_handle_color_g;
229 uint32_t lock_handle_color_b;
230 uint32_t last_item_width;
232 bool wide_enough_for_name;
233 bool high_enough_for_name;
236 ArdourCanvas::Group* group;
237 ArdourCanvas::Rectangle* vestigial_frame;
238 ArdourCanvas::Rectangle* frame;
239 ArdourCanvas::Text* name_text;
240 ArdourCanvas::Rectangle* name_highlight;
242 /* with these two values, if frame_handle_start == 0 then frame_handle_end will also be 0 */
243 ArdourCanvas::Rectangle* frame_handle_start; ///< `frame' (fade) handle for the start of the item, or 0
244 ArdourCanvas::Rectangle* frame_handle_end; ///< `frame' (fade) handle for the end of the item, or 0
247 Visibility visibility;
249 bool _automation; ///< true if this is an automation region view
254 void parameter_changed (std::string);
256 }; /* class TimeAxisViewItem */
258 #endif /* __gtk_ardour_time_axis_view_item_h__ */