gtk2_ardour/group_tabs.h

   1 /*
   2     Copyright (C) 2009 Paul Davis
   3
   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.
   8
   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.
  13
  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.
  17
  18 */
  19
  20 #include <gtkmm/menu.h>
  21 #include "editor_component.h"
  22 #include "cairo_widget.h"
  23
  24 namespace ARDOUR {
  25         class Session;
  26         class RouteGroup;
  27 }
  28
  29 class Editor;
  30
  31 /** Parent class for tabs which represent route groups as coloured tabs;
  32  *  Currently used on the left-hand side of the editor and at the top of the mixer.
  33  */
  34 class GroupTabs : public CairoWidget, public EditorComponent
  35 {
  36 public:
  37         GroupTabs (Editor *);
  38
  39         void set_session (ARDOUR::Session *);
  40
  41 protected:
  42
  43         struct Tab {
  44                 Tab () : group (0) {}
  45
  46                 double from;
  47                 double to;
  48                 Gdk::Color colour; ///< colour
  49                 ARDOUR::RouteGroup* group; ///< route group
  50         };
  51
  52 private:
  53         /** Compute all the tabs for this widget.
  54          *  @return Tabs.
  55          */
  56         virtual std::list<Tab> compute_tabs () const = 0;
  57
  58         /** Draw a tab.
  59          *  @param cr Cairo context.
  60          *  @param t Tab.
  61          */
  62         virtual void draw_tab (cairo_t* cr, Tab const & t) const = 0;
  63
  64         /** @param x x coordinate
  65          *  @param y y coordinate
  66          *  @return x or y, depending on which is the primary coordinate for this widget.
  67          */
  68         virtual double primary_coordinate (double, double) const = 0;
  69
  70         virtual ARDOUR::RouteList routes_for_tab (Tab const * t) const = 0;
  71
  72         /** @return Size of the widget along the primary axis */
  73         virtual double extent () const = 0;
  74
  75         /** @param g Route group, or 0.
  76          *  @return Menu to be popped up on right-click over the given route group.
  77          */
  78         virtual Gtk::Menu* get_menu (ARDOUR::RouteGroup* g) = 0;
  79
  80         virtual ARDOUR::RouteGroup* new_route_group () const = 0;
  81
  82         void render (cairo_t *);
  83         void on_size_request (Gtk::Requisition *);
  84         bool on_button_press_event (GdkEventButton *);
  85         bool on_motion_notify_event (GdkEventMotion *);
  86         bool on_button_release_event (GdkEventButton *);
  87
  88         Tab * click_to_tab (double, std::list<Tab>::iterator *, std::list<Tab>::iterator *);
  89
  90         std::list<Tab> _tabs; ///< current list of tabs
  91         Tab* _dragging; ///< tab being dragged, or 0
  92         bool _dragging_new_tab; ///< true if we're dragging a new tab
  93         bool _drag_moved; ///< true if there has been movement during any current drag
  94         double _drag_fixed; ///< the position of the fixed end of the tab being dragged
  95         double _drag_moving; ///< the position of the moving end of the tab being dragged
  96         double _drag_offset; ///< offset from the mouse to the end of the tab being dragged
  97         double _drag_min; ///< minimum position for drag
  98         double _drag_max; ///< maximum position for drag
  99         double _drag_first; ///< first mouse pointer position during drag
 100 };