add locale-guard when saving engine states, also #6418
[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 #include "ardour_ui.h"
38 #include "global_signals.h"
39
40 #include "i18n.h"
41
42 #define REFLECTION_HEIGHT 2
43
44 using namespace Gdk;
45 using namespace Gtk;
46 using namespace Glib;
47 using namespace PBD;
48 using std::max;
49 using std::min;
50 using namespace std;
51
52
53 ArdourDropdown::ArdourDropdown (Element e)
54 {
55 //      signal_button_press_event().connect (sigc::mem_fun(*this, &ArdourDropdown::on_mouse_pressed));
56
57         add_elements(e);
58         add_elements(ArdourButton::Menu);
59 }
60
61 ArdourDropdown::~ArdourDropdown ()
62 {
63 }
64
65 bool
66 ArdourDropdown::on_button_press_event (GdkEventButton* ev)
67 {
68         if (ev->type == GDK_BUTTON_PRESS) {
69                 _menu.popup (1, gtk_get_current_event_time());
70         }
71         return true;
72 }
73
74 bool
75 ArdourDropdown::on_scroll_event (GdkEventScroll* ev)
76 {
77         using namespace Menu_Helpers;
78
79         const MenuItem * current_active = _menu.get_active();
80         const MenuList& items = _menu.items ();
81         int c = 0;
82
83         if (!current_active) {
84                 return true;
85         }
86
87         /* work around another gtkmm API clusterfuck
88          * const MenuItem* get_active () const
89          * void set_active (guint index)
90          *
91          * also MenuList.activate_item does not actually
92          * set it as active in the menu.
93          *
94          */
95
96         switch (ev->direction) {
97                 case GDK_SCROLL_UP:
98
99                         for (MenuList::const_reverse_iterator i = items.rbegin(); i != items.rend(); ++i, ++c) {
100                                 if ( &(*i) != current_active) {
101                                         continue;
102                                 }
103                                 if (++i != items.rend()) {
104                                         c = items.size() - 2 - c;
105                                         assert(c >= 0);
106                                         _menu.set_active(c);
107                                         _menu.activate_item(*i);
108                                 }
109                                 break;
110                         }
111                         break;
112                 case GDK_SCROLL_DOWN:
113                         for (MenuList::const_iterator i = items.begin(); i != items.end(); ++i, ++c) {
114                                 if ( &(*i) != current_active) {
115                                         continue;
116                                 }
117                                 if (++i != items.end()) {
118                                         assert(c + 1 < (int) items.size());
119                                         _menu.set_active(c + 1);
120                                         _menu.activate_item(*i);
121                                 }
122                                 break;
123                         }
124                         break;
125                 default:
126                         break;
127         }
128         return true;
129 }
130
131 void
132 ArdourDropdown::clear_items ()
133 {
134         _menu.items ().clear ();
135 }
136
137 void
138 ArdourDropdown::AddMenuElem (Menu_Helpers::Element e)
139 {
140         using namespace Menu_Helpers;
141
142         MenuList& items = _menu.items ();
143         
144         items.push_back (e);
145 }
146
147