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__
23 #include <jack/jack.h>
26 #include <libgnomecanvasmm/pixbuf.h>
28 #include "pbd/signals.h"
30 #include "selectable.h"
31 #include "simplerect.h"
37 * A base class for 'items' that may appear upon a TimeAxisView
40 class TimeAxisViewItem : public Selectable, public PBD::ScopedConnectionList
43 virtual ~TimeAxisViewItem() ;
46 * Set the position of this item upon the timeline to the specified value
48 * @param pos the new position
49 * @param src the identity of the object that initiated the change
50 * @return true if the position change was a success, false otherwise
52 virtual bool set_position(nframes64_t pos, void* src, double* delta = 0) ;
55 * Return the position of this item upon the timeline
57 * @return the position of this item
59 nframes64_t get_position() const ;
62 * Sets the duration of this item
64 * @param dur the new duration of this item
65 * @param src the identity of the object that initiated the change
66 * @return true if the duration change was succesful, false otherwise
68 virtual bool set_duration(nframes64_t dur, void* src) ;
71 * Returns the duration of this item
74 nframes64_t get_duration() const ;
77 * Sets the maximum duration that this item make have.
79 * @param dur the new maximum duration
80 * @param src the identity of the object that initiated the change
82 virtual void set_max_duration(nframes64_t dur, void* src) ;
85 * Returns the maxmimum duration that this item may be set to
87 * @return the maximum duration that this item may be set to
89 nframes64_t get_max_duration() const ;
92 * Sets the minimu duration that this item may be set to
94 * @param the minimum duration that this item may be set to
95 * @param src the identity of the object that initiated the change
97 virtual void set_min_duration(nframes64_t dur, void* src) ;
100 * Returns the minimum duration that this item mey be set to
102 * @return the nimum duration that this item mey be set to
104 nframes64_t get_min_duration() const ;
107 * Sets whether the position of this Item is locked to its current position
108 * Locked items cannot be moved until the item is unlocked again.
110 * @param yn set to true to lock this item to its current position
111 * @param src the identity of the object that initiated the change
113 virtual void set_position_locked(bool yn, void* src) ;
116 * Returns whether this item is locked to its current position
118 * @return true if this item is locked to its current posotion
121 bool get_position_locked() const ;
124 * Sets whether the Maximum Duration constraint is active and should be enforced
126 * @param active set true to enforce the max duration constraint
127 * @param src the identity of the object that initiated the change
129 void set_max_duration_active(bool active, void* src) ;
132 * Returns whether the Maximum Duration constraint is active and should be enforced
134 * @return true if the maximum duration constraint is active, false otherwise
136 bool get_max_duration_active() const ;
139 * Sets whether the Minimum Duration constraint is active and should be enforced
141 * @param active set true to enforce the min duration constraint
142 * @param src the identity of the object that initiated the change
144 void set_min_duration_active(bool active, void* src) ;
147 * Returns whether the Maximum Duration constraint is active and should be enforced
149 * @return true if the maximum duration constraint is active, false otherwise
151 bool get_min_duration_active() const ;
154 * Set the name/Id of this item.
156 * @param new_name the new name of this item
157 * @param src the identity of the object that initiated the change
159 void set_item_name(std::string new_name, void* src) ;
162 * Returns the name/id of this item
164 * @return the name/id of this item
166 virtual std::string get_item_name() const ;
169 * Set to true to indicate that this item is currently selected
171 * @param yn true if this item is currently selected
173 virtual void set_selected(bool yn) ;
176 * Set to true to indicate that this item should show its selection status
178 * @param yn true if this item should show its selected status
180 virtual void set_should_show_selection (bool yn) ;
182 void set_sensitive (bool yn) { _sensitive = yn; }
183 bool sensitive () const { return _sensitive; }
185 //---------------------------------------------------------------------------------------//
186 // Parent Component Methods
189 * Returns the TimeAxisView that this item is upon
191 * @return the timeAxisView that this item is placed upon
193 TimeAxisView& get_time_axis_view() ;
195 //---------------------------------------------------------------------------------------//
199 * Sets the displayed item text
200 * This item is the visual text name displayed on the canvas item, this can be different to the name of the item
202 * @param new_name the new name text to display
204 void set_name_text(const Glib::ustring& new_name) ;
207 * Set the height of this item
209 * @param h the new height
211 virtual void set_height(double h) ;
218 void set_color (Gdk::Color const &);
223 ArdourCanvas::Item* get_canvas_frame() ;
228 ArdourCanvas::Group* get_canvas_group();
233 ArdourCanvas::Item* get_name_highlight();
238 ArdourCanvas::Pixbuf* get_name_pixbuf();
242 * Returns the time axis that this item is upon
244 TimeAxisView& get_trackview() const { return trackview; }
247 * Sets the samples per unit of this item.
248 * this item is used to determine the relative visual size and position of this item
249 * based upon its duration and start value.
251 * @param spu the new samples per unit value
253 virtual void set_samples_per_unit(double spu) ;
256 * Returns the current samples per unit of this item
258 * @return the samples per unit of this item
260 double get_samples_per_unit() ;
262 virtual void raise () { return; }
263 virtual void raise_to_top () { return; }
264 virtual void lower () { return; }
265 virtual void lower_to_bottom () { return; }
268 * returns true if the name area should respond to events.
270 bool name_active() const { return name_connected; }
272 // Default sizes, font and spacing
273 static Pango::FontDescription* NAME_FONT ;
274 static bool have_name_font;
275 static const double NAME_X_OFFSET ;
276 static const double GRAB_HANDLE_LENGTH ;
277 /* these are not constant, but vary with the pixel size
278 of the font used to display the item name.
280 static int NAME_HEIGHT;
281 static double NAME_Y_OFFSET ;
282 static double NAME_HIGHLIGHT_SIZE ;
283 static double NAME_HIGHLIGHT_THRESH ;
286 * Handles the Removal of this time axis item
287 * This _needs_ to be called to alert others of the removal properly, ie where the source
288 * of the removal came from.
290 * XXX Although im not too happy about this method of doing things, I cant think of a cleaner method
291 * just now to capture the source of the removal
293 * @param src the identity of the object that initiated the change
295 virtual void remove_this_item(void* src) ;
298 * Emitted when this Group has been removed
299 * This is different to the CatchDeletion signal in that this signal
300 * is emitted during the deletion of this Time Axis, and not during
301 * the destructor, this allows us to capture the source of the deletion
305 sigc::signal<void,std::string,void*> ItemRemoved ;
307 /** Emitted when the name/Id of this item is changed */
308 sigc::signal<void,std::string,std::string,void*> NameChanged ;
310 /** Emiited when the position of this item changes */
311 sigc::signal<void,nframes64_t,void*> PositionChanged ;
313 /** Emitted when the position lock of this item is changed */
314 sigc::signal<void,bool,void*> PositionLockChanged ;
316 /** Emitted when the duration of this item changes */
317 sigc::signal<void,nframes64_t,void*> DurationChanged ;
319 /** Emitted when the maximum item duration is changed */
320 sigc::signal<void,nframes64_t,void*> MaxDurationChanged ;
322 /** Emitted when the mionimum item duration is changed */
323 sigc::signal<void,nframes64_t,void*> MinDurationChanged ;
327 ShowNameHighlight = 0x2,
330 HideFrameLeft = 0x10,
331 HideFrameRight = 0x20,
333 FullWidthNameHighlight = 0x80
337 * Constructs a new TimeAxisViewItem.
339 * @param it_name the unique name/Id of this item
340 * @param parent the parent canvas group
341 * @param tv the TimeAxisView we are going to be added to
342 * @param spu samples per unit
344 * @param start the start point of this item
345 * @param duration the duration of this item
347 TimeAxisViewItem(const std::string & it_name, ArdourCanvas::Group& parent, TimeAxisView& tv, double spu, Gdk::Color const & base_color,
348 nframes64_t start, nframes64_t duration, bool recording = false, Visibility v = Visibility (0));
350 TimeAxisViewItem (const TimeAxisViewItem& other);
352 void init (const std::string& it_name, double spu, Gdk::Color const & base_color, nframes64_t start, nframes64_t duration, Visibility vis, bool, bool);
355 * Calculates some contrasting color for displaying various parts of this item, based upon the base color
357 * @param color the base color of the item
359 virtual void compute_colors (Gdk::Color const & color);
362 * convenience method to set the various canvas item colors
364 virtual void set_colors() ;
367 * Sets the frame color depending on whether this item is selected
369 virtual void set_frame_color() ;
372 * Sets the colors of the start and end trim handle depending on object state
375 void set_trim_handle_colors() ;
377 virtual void reset_width_dependent_items (double pixel_width);
378 void reset_name_width (double pixel_width);
379 void update_name_pixbuf_visibility ();
382 * Callback used to remove this item during the gtk idle loop
383 * This is used to avoid deleting the obejct while inside the remove_this_group
386 * @param item the time axis item to remove
387 * @param src the identity of the object that initiated the change
389 static gint idle_remove_this_item(TimeAxisViewItem* item, void* src) ;
391 /** The time axis that this item is upon */
392 TimeAxisView& trackview ;
394 /** indicates whether this item is locked to its current position */
395 bool position_locked ;
397 /** The posotion of this item on the timeline */
398 nframes64_t frame_position ;
400 /** the duration of this item upon the timeline */
401 nframes64_t item_duration ;
403 /** the maximum duration that we allow this item to take */
404 nframes64_t max_item_duration ;
406 /** the minimu duration that we allow this item to take */
407 nframes64_t min_item_duration ;
409 /** indicates whether this Max Duration constraint is active */
410 bool max_duration_active ;
412 /** indicates whether this Min Duration constraint is active */
413 bool min_duration_active ;
415 /** the curretn samples per canvas unit */
416 double samples_per_unit ;
418 /** should the item show its selected status */
419 bool should_show_selection;
421 /** should the item respond to events */
425 * The unique item name of this Item
426 * Each item upon a time axis must have a unique id
428 std::string item_name ;
431 * true if the name should respond to events
436 * true if a small vestigial rect should be shown when the item gets very narrow
441 uint32_t fill_opacity;
442 uint32_t fill_color ;
443 uint32_t frame_color_r ;
444 uint32_t frame_color_g ;
445 uint32_t frame_color_b ;
446 uint32_t selected_frame_color_r ;
447 uint32_t selected_frame_color_g ;
448 uint32_t selected_frame_color_b ;
449 uint32_t label_color ;
451 uint32_t handle_color_r ;
452 uint32_t handle_color_g ;
453 uint32_t handle_color_b ;
454 uint32_t lock_handle_color_r ;
455 uint32_t lock_handle_color_g ;
456 uint32_t lock_handle_color_b ;
457 uint32_t last_item_width;
458 int name_pixbuf_width;
459 bool wide_enough_for_name;
460 bool high_enough_for_name;
462 ArdourCanvas::Group* group;
463 ArdourCanvas::SimpleRect* vestigial_frame;
464 ArdourCanvas::SimpleRect* frame;
465 ArdourCanvas::Pixbuf* name_pixbuf;
466 ArdourCanvas::SimpleRect* name_highlight;
467 ArdourCanvas::SimpleRect* frame_handle_start;
468 ArdourCanvas::SimpleRect* frame_handle_end;
470 Visibility visibility;
473 }; /* class TimeAxisViewItem */
475 #endif /* __gtk_ardour_time_axis_view_item_h__ */