1 // HUD_label.cxx -- HUD Label
3 // Written by Michele America, started September 1997.
5 // Copyright (C) 1997 Michele F. America [micheleamerica#geocities:com]
6 // Copyright (C) 2006 Melchior FRANZ [mfranz#aon:at]
8 // This program is free software; you can redistribute it and/or
9 // modify it under the terms of the GNU General Public License as
10 // published by the Free Software Foundation; either version 2 of the
11 // License, or (at your option) any later version.
13 // This program is distributed in the hope that it will be useful, but
14 // WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 // General Public License for more details.
18 // You should have received a copy of the GNU General Public License
19 // along with this program; if not, write to the Free Software
20 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
26 #include <simgear/props/condition.hxx>
30 HUD::Label::Label(HUD *hud, const SGPropertyNode *n, float x, float y) :
32 _input(n->getNode("input", false)),
33 _fontsize(fgGetInt("/sim/startup/xsize") > 1000 ? FONT_LARGE : FONT_SMALL), // FIXME
34 _box(n->getBoolValue("box", false)),
36 _blink_interval(n->getFloatValue("blinking/interval", -1.0f)),
40 const SGPropertyNode *node = n->getNode("blinking/condition");
42 _blink_condition = sgReadCondition(globals->get_props(), node);
44 const char *halign = n->getStringValue("halign", "center");
45 if (!strcmp(halign, "left"))
47 else if (!strcmp(halign, "right"))
48 _halign = RIGHT_ALIGN;
50 _halign = CENTER_ALIGN;
52 const char *pre = n->getStringValue("prefix", 0);
53 const char *post = n->getStringValue("postfix", 0);
54 const char *fmt = n->getStringValue("format", 0);
67 _mode = check_format(_format.c_str());
68 if (_mode == INVALID) {
69 SG_LOG(SG_INPUT, SG_ALERT, "HUD: invalid format '" << _format.c_str() << '\'');
75 _hud->_font->getBBox("0", _hud->_font_size, 0.0, 0, 0, 0, &top);
76 _text_y = _y + (_h - top) / 2.0;
81 void HUD::Label::draw(void)
83 if (!(_mode == NONE || _input.isValid() && blink()))
87 draw_line(_x, _y, _x + _w, _y);
88 draw_line(_x + _w, _y, _x + _w, _y + _h);
89 draw_line(_x + _w, _y + _h, _x, _y + _h);
90 draw_line(_x, _y + _h, _x, _y);
93 const int BUFSIZE = 256;
96 snprintf(buf, BUFSIZE, _format.c_str());
97 else if (_mode == STRING)
98 snprintf(buf, BUFSIZE, _format.c_str(), _input.getStringValue());
99 else if (_mode == INT)
100 snprintf(buf, BUFSIZE, _format.c_str(), int(_input.getFloatValue()));
101 else if (_mode == LONG)
102 snprintf(buf, BUFSIZE, _format.c_str(), long(_input.getFloatValue()));
103 else if (_mode == FLOAT)
104 snprintf(buf, BUFSIZE, _format.c_str(), float(_input.getFloatValue()));
105 else if (_mode == DOUBLE) // not really supported yet
106 snprintf(buf, BUFSIZE, _format.c_str(), double(_input.getFloatValue()));
109 float lenstr = text_width(buf);
111 if (_halign == RIGHT_ALIGN)
112 posincr = _w - lenstr;
113 else if (_halign == CENTER_ALIGN)
114 posincr = (_w - lenstr) / 2.0;
118 if (_fontsize == FONT_SMALL)
119 draw_text(_x + posincr, _text_y, buf, get_digits());
120 else if (_fontsize == FONT_LARGE)
121 draw_text(_x + posincr, _text_y, buf, get_digits());
125 // make sure the format matches '[ -+#]?\d*(\.\d*)?(l?[df]|s)'
127 HUD::Label::Format HUD::Label::check_format(const char *f) const
142 if (*f == ' ' || *f == '+' || *f == '-' || *f == '#')
144 while (*f && isdigit(*f))
148 while (*f && isdigit(*f))
155 fmt = l ? LONG : INT;
157 fmt = l ? DOUBLE : FLOAT;
158 else if (*f == 's') {
177 bool HUD::Label::blink()
179 if (_blink_interval < 0.0f)
182 if (_blink_condition && !_blink_condition->test())
185 if (_hud->timer() < _blink_target)
188 _blink_target = _hud->timer() + _blink_interval;
189 return _blink_state = !_blink_state;