enough with umpteen "i18n.h" files. Consolidate on pbd/i18n.h
[ardour.git] / gtk2_ardour / ardour_dropdown.cc
1 /*
2     Copyright (C) 2014 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 <iostream>
21 #include <cmath>
22 #include <algorithm>
23
24 #include <pangomm/layout.h>
25
26 #include "pbd/compose.h"
27 #include "pbd/error.h"
28 #include "pbd/stacktrace.h"
29
30 #include "gtkmm2ext/utils.h"
31 #include "gtkmm2ext/rgb_macros.h"
32 #include "gtkmm2ext/gui_thread.h"
33
34 #include "ardour/rc_configuration.h" // for widget prelight preference
35
36 #include "ardour_dropdown.h"
37
38 #include "pbd/i18n.h"
39
40 #define REFLECTION_HEIGHT 2
41
42 using namespace Gdk;
43 using namespace Gtk;
44 using namespace Glib;
45 using namespace PBD;
46 using std::max;
47 using std::min;
48 using namespace std;
49
50
51 ArdourDropdown::ArdourDropdown (Element e)
52         : _scrolling_disabled(false)
53 {
54 //      signal_button_press_event().connect (sigc::mem_fun(*this, &ArdourDropdown::on_mouse_pressed));
55
56         add_elements(e);
57         add_elements(ArdourButton::Menu);
58 }
59
60 ArdourDropdown::~ArdourDropdown ()
61 {
62 }
63
64 bool
65 ArdourDropdown::on_button_press_event (GdkEventButton* ev)
66 {
67         if (ev->type == GDK_BUTTON_PRESS) {
68                 _menu.popup (1, gtk_get_current_event_time());
69         }
70         return true;
71 }
72
73 bool
74 ArdourDropdown::on_scroll_event (GdkEventScroll* ev)
75 {
76         using namespace Menu_Helpers;
77
78         if (_scrolling_disabled) {
79                 return false;
80         }
81
82         const MenuItem * current_active = _menu.get_active();
83         const MenuList& items = _menu.items ();
84         int c = 0;
85
86         if (!current_active) {
87                 return true;
88         }
89
90         /* work around another gtkmm API clusterfuck
91          * const MenuItem* get_active () const
92          * void set_active (guint index)
93          *
94          * also MenuList.activate_item does not actually
95          * set it as active in the menu.
96          *
97          */
98
99         switch (ev->direction) {
100                 case GDK_SCROLL_UP:
101
102                         for (MenuList::const_reverse_iterator i = items.rbegin(); i != items.rend(); ++i, ++c) {
103                                 if ( &(*i) != current_active) {
104                                         continue;
105                                 }
106                                 if (++i != items.rend()) {
107                                         c = items.size() - 2 - c;
108                                         assert(c >= 0);
109                                         _menu.set_active(c);
110                                         _menu.activate_item(*i);
111                                 }
112                                 break;
113                         }
114                         break;
115                 case GDK_SCROLL_DOWN:
116                         for (MenuList::const_iterator i = items.begin(); i != items.end(); ++i, ++c) {
117                                 if ( &(*i) != current_active) {
118                                         continue;
119                                 }
120                                 if (++i != items.end()) {
121                                         assert(c + 1 < (int) items.size());
122                                         _menu.set_active(c + 1);
123                                         _menu.activate_item(*i);
124                                 }
125                                 break;
126                         }
127                         break;
128                 default:
129                         break;
130         }
131         return true;
132 }
133
134 void
135 ArdourDropdown::clear_items ()
136 {
137         _menu.items ().clear ();
138 }
139
140 void
141 ArdourDropdown::AddMenuElem (Menu_Helpers::Element e)
142 {
143         using namespace Menu_Helpers;
144
145         MenuList& items = _menu.items ();
146
147         items.push_back (e);
148 }
149
150 void
151 ArdourDropdown::disable_scrolling()
152 {
153         _scrolling_disabled = true;
154 }