1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
|
# This file is part of the Frescobaldi project, http://www.frescobaldi.org/
#
# Copyright (c) 2008 - 2014 by Wilbert Berendsen
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
# See http://www.gnu.org/licenses/ for more information.
"""
A button that emits a tempo(int) signal when the user clicks multiple times.
"""
import time
from PyQt5.QtCore import pyqtSignal
from PyQt5.QtWidgets import QToolButton
import app
import icons
class TempoButton(QToolButton):
"""A button the user can tap a tempo on.
emits tempo(bpm) when the user clicks the button multiple times.
"""
tempo = pyqtSignal(int)
def __init__(self, icon=None, parent=None):
super(TempoButton, self).__init__(parent)
self.setIcon(icon or icons.get("media-record"))
self.tapStart = 0.0
self.tapTime = 0.0
self.tapCount = 0
self.pressed.connect(self.slotPressed)
app.translateUI(self)
def translateUI(self):
self.setToolTip(_("The tempo is set as you click this button."))
self.setWhatsThis(_(
"Tap this button to set the tempo.\n\n"
"The average speed of clicking is used; wait 3 seconds to \"reset\"."))
def slotPressed(self):
self.tapTime, t = time.time(), self.tapTime
if 0.1 < self.tapTime - t < 3.0:
self.tapCount += 1
bpm = int(60.0 * self.tapCount / (self.tapTime - self.tapStart))
self.tempo.emit(bpm)
else:
self.tapStart = self.tapTime
self.tapCount = 0
|
