1 /***************************************************************************
2 SelectRangePlugin.cpp - Plugin for selecting a range of samples
3 -------------------
4 begin : Sat Jun 15 2002
5 copyright : (C) 2002 by Thomas Eschenbacher
6 email : Thomas.Eschenbacher@gmx.de
7 ***************************************************************************/
8
9 /***************************************************************************
10 * *
11 * This program is free software; you can redistribute it and/or modify *
12 * it under the terms of the GNU General Public License as published by *
13 * the Free Software Foundation; either version 2 of the License, or *
14 * (at your option) any later version. *
15 * *
16 ***************************************************************************/
17
18 #include "config.h"
19
20 #include <errno.h>
21 #include <math.h>
22 #include <new>
23
24 #include <KLocalizedString>
25 #include <QString>
26
27 #include "libkwave/Plugin.h"
28 #include "libkwave/PluginManager.h"
29 #include "libkwave/SignalManager.h"
30 #include "libkwave/String.h"
31 #include "libkwave/undo/UndoTransactionGuard.h"
32
33 #include "SelectRangeDialog.h"
34 #include "SelectRangePlugin.h"
35
KWAVE_PLUGIN(selectrange,SelectRangePlugin)36 KWAVE_PLUGIN(selectrange, SelectRangePlugin)
37
38 //***************************************************************************
39 Kwave::SelectRangePlugin::SelectRangePlugin(QObject *parent,
40 const QVariantList &args)
41 :Kwave::Plugin(parent, args),
42 m_start_mode(Kwave::SelectTimeWidget::bySamples),
43 m_range_mode(Kwave::SelectTimeWidget::bySamples),
44 m_start(0), m_range(0)
45 {
46 }
47
48 //***************************************************************************
~SelectRangePlugin()49 Kwave::SelectRangePlugin::~SelectRangePlugin()
50 {
51 }
52
53 //***************************************************************************
setup(QStringList & previous_params)54 QStringList *Kwave::SelectRangePlugin::setup(QStringList &previous_params)
55 {
56 // try to interpret the previous parameters
57 interpreteParameters(previous_params);
58
59 // create the setup dialog
60 double rate = signalRate();
61 sample_index_t offset = manager().selectionStart();
62 sample_index_t length = signalLength();
63
64 QPointer<Kwave::SelectRangeDialog> dialog =
65 new(std::nothrow) Kwave::SelectRangeDialog(parentWidget(),
66 m_start_mode, m_range_mode, m_range, rate, offset, length);
67 Q_ASSERT(dialog);
68 if (!dialog) return Q_NULLPTR;
69
70 QStringList *list = new(std::nothrow) QStringList();
71 Q_ASSERT(list);
72 if (list && dialog->exec() && dialog) {
73 // user has pressed "OK"
74 *list << QString::number(dialog->startMode());
75 *list << QString::number(dialog->rangeMode());
76 *list << QString::number(dialog->start());
77 *list << QString::number(dialog->range());
78
79 emitCommand(_("plugin:execute(selectrange,") +
80 QString::number(dialog->startMode()) + _(",") +
81 QString::number(dialog->rangeMode()) + _(",") +
82 QString::number(dialog->start()) + _(",") +
83 QString::number(dialog->range())+
84 _(")")
85 );
86 } else {
87 // user pressed "Cancel"
88 if (list) delete list;
89 list = Q_NULLPTR;
90 }
91
92 if (dialog) delete dialog;
93 return list;
94 }
95
96 //***************************************************************************
start(QStringList & params)97 int Kwave::SelectRangePlugin::start(QStringList ¶ms)
98 {
99 // interprete the parameters
100 int result = interpreteParameters(params);
101 if (result) return result;
102
103 const sample_index_t signal_length = signalLength();
104
105 // get current offset of the signal
106 sample_index_t offset = Kwave::SelectTimeWidget::timeToSamples(
107 m_start_mode, m_start, signalRate(), signal_length);
108
109 // transform into offset and length [samples]
110 sample_index_t length = Kwave::SelectTimeWidget::timeToSamples(
111 m_range_mode, m_range, signalRate(), signal_length);
112
113 // limit selection to end of signal
114 if (length > signal_length)
115 length = signal_length;
116 if ((offset + length) >= signal_length)
117 length = signal_length - offset;
118
119 // change the selection through the signal manager
120 {
121 Kwave::UndoTransactionGuard undo_guard(*this, i18n("Select Range"));
122 selectRange(offset, length);
123 }
124
125 return result;
126 }
127
128 //***************************************************************************
interpreteParameters(QStringList & params)129 int Kwave::SelectRangePlugin::interpreteParameters(QStringList ¶ms)
130 {
131 bool ok;
132 QString param;
133 int mode;
134
135 // evaluate the parameter list
136 if (params.count() != 4) {
137 return -EINVAL;
138 }
139
140 // selection mode for start
141 param = params[0];
142 mode = param.toInt(&ok);
143 Q_ASSERT(ok);
144 if (!ok) return -EINVAL;
145 Q_ASSERT(
146 (mode == static_cast<int>(Kwave::SelectTimeWidget::byTime)) ||
147 (mode == static_cast<int>(Kwave::SelectTimeWidget::bySamples)) ||
148 (mode == static_cast<int>(Kwave::SelectTimeWidget::byPercents))
149 );
150 if ((mode != static_cast<int>(Kwave::SelectTimeWidget::byTime)) &&
151 (mode != static_cast<int>(Kwave::SelectTimeWidget::bySamples)) &&
152 (mode != static_cast<int>(Kwave::SelectTimeWidget::byPercents)))
153 {
154 return -EINVAL;
155 }
156 m_start_mode = static_cast<Kwave::SelectTimeWidget::Mode>(mode);
157
158
159 // selection mode
160 param = params[1];
161 mode = param.toInt(&ok);
162 Q_ASSERT(ok);
163 if (!ok) return -EINVAL;
164 Q_ASSERT(
165 (mode == static_cast<int>(Kwave::SelectTimeWidget::byTime)) ||
166 (mode == static_cast<int>(Kwave::SelectTimeWidget::bySamples)) ||
167 (mode == static_cast<int>(Kwave::SelectTimeWidget::byPercents))
168 );
169 if ((mode != static_cast<int>(Kwave::SelectTimeWidget::byTime)) &&
170 (mode != static_cast<int>(Kwave::SelectTimeWidget::bySamples)) &&
171 (mode != static_cast<int>(Kwave::SelectTimeWidget::byPercents)))
172 {
173 return -EINVAL;
174 }
175 m_range_mode = static_cast<Kwave::SelectTimeWidget::Mode>(mode);
176
177 // offset in ms, samples or percent
178 param = params[2];
179 m_start = param.toUInt(&ok);
180 if (!ok) return -EINVAL;
181
182 // range in ms, samples or percent
183 param = params[3];
184 m_range = param.toUInt(&ok);
185 if (!ok) return -EINVAL;
186
187 return 0;
188 }
189
190 //***************************************************************************
191 #include "SelectRangePlugin.moc"
192 //***************************************************************************
193 //***************************************************************************
194