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-rw-r--r--attic/muse_qt4_evolution/awl/floatentry.cpp317
1 files changed, 317 insertions, 0 deletions
diff --git a/attic/muse_qt4_evolution/awl/floatentry.cpp b/attic/muse_qt4_evolution/awl/floatentry.cpp
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+//=============================================================================
+// Awl
+// Audio Widget Library
+// $Id:$
+//
+// Copyright (C) 2002-2006 by Werner Schweer and others
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License version 2.
+//
+// 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+//=============================================================================
+
+#include "floatentry.h"
+#include "fastlog.h"
+
+#define TIMER1 400
+#define TIMER2 200
+#define TIMEC 7
+#define TIMER3 100
+#define TIMEC2 20
+#define TIMER4 50
+
+namespace Awl {
+
+//---------------------------------------------------------
+// FloatEntry
+//---------------------------------------------------------
+
+FloatEntry::FloatEntry(QWidget* parent)
+ : QLineEdit(parent)
+ {
+ _id = 0;
+ _minValue = 0.0;
+ _maxValue = 1.0;
+ _log = false;
+ evx = 1.0;
+ _precision = 3;
+ timer = new QTimer(this);
+ connect(timer, SIGNAL(timeout()), SLOT(repeat()));
+ _value = 0.0f;
+ connect(this, SIGNAL(returnPressed()), SLOT(endEdit()));
+ setCursor(QCursor(Qt::ArrowCursor));
+ updateValue();
+ }
+
+//---------------------------------------------------------
+// setString
+//---------------------------------------------------------
+
+bool FloatEntry::setString(double v)
+ {
+ QString s;
+// if (v < _minValue || v > _maxValue) {
+ if (v < _minValue) {
+ if (!_specialText.isEmpty())
+ setText(_specialText);
+ return true;
+ }
+ s.setNum(v, 'f', _precision);
+ if (!_suffix.isEmpty()) {
+ // s += " ";
+ s += _suffix;
+ }
+ setText(s);
+ return false;
+ }
+
+//---------------------------------------------------------
+// setSValue
+//---------------------------------------------------------
+
+void FloatEntry::setSValue(const QString& s)
+ {
+ bool ok;
+ double v = s.toFloat(&ok);
+ if (ok && (v != _value)) {
+ if (v < _minValue)
+ v = _minValue;
+ if (v > _maxValue)
+ v = _maxValue;
+ _value = v;
+ updateValue();
+ valueChange();
+ }
+ }
+
+//---------------------------------------------------------
+// valueChange
+//---------------------------------------------------------
+
+void FloatEntry::valueChange()
+ {
+ emit valueChanged(value(), _id);
+ }
+
+//---------------------------------------------------------
+// incValue
+//---------------------------------------------------------
+
+void FloatEntry::incValue(double)
+ {
+ if (_value + 1.0 < _maxValue) {
+ _value = _value + 1.0;
+ updateValue();
+ valueChange();
+ }
+ }
+
+//---------------------------------------------------------
+// decValue
+//---------------------------------------------------------
+
+void FloatEntry::decValue(double)
+ {
+ if (_value - 1.0 > _minValue) {
+ _value = _value - 1.0;
+ updateValue();
+ valueChange();
+ }
+ }
+
+//---------------------------------------------------------
+// setPrecision
+//---------------------------------------------------------
+
+void FloatEntry::setPrecision(int v)
+ {
+ _precision = v;
+ setString(_value);
+ }
+
+//---------------------------------------------------------
+// sizeHint
+//---------------------------------------------------------
+
+QSize FloatEntry::sizeHint() const
+ {
+ QFontMetrics fm = fontMetrics();
+ int h = fm.height() + 4;
+ int n = _precision + 3;
+ int w = fm.width(QString("-0.")) + fm.width('0') * n + 6;
+ return QSize(w, h);
+ }
+
+//---------------------------------------------------------
+// endEdit
+//---------------------------------------------------------
+
+void FloatEntry::endEdit()
+ {
+ if (QLineEdit::isModified())
+ setSValue(text());
+ clearFocus();
+ }
+
+//---------------------------------------------------------
+// mousePressEvent
+//---------------------------------------------------------
+
+void FloatEntry::mousePressEvent(QMouseEvent* event)
+ {
+ button = event->button();
+ starty = event->y();
+ evx = double(event->x());
+ timecount = 0;
+ repeat();
+ timer->start(TIMER1);
+ }
+
+//---------------------------------------------------------
+// wheelEvent
+//---------------------------------------------------------
+
+void FloatEntry::wheelEvent(QWheelEvent* event)
+ {
+ int delta = event->delta();
+
+ if (delta < 0)
+ decValue(-1.0);
+ else if (delta > 0)
+ incValue(1.0);
+ }
+
+//---------------------------------------------------------
+// repeat
+//---------------------------------------------------------
+
+void FloatEntry::repeat()
+ {
+ if (timecount == 1) {
+ ++timecount;
+ timer->stop();
+ timer->start(TIMER2);
+ return;
+ }
+ ++timecount;
+ if (timecount == TIMEC) {
+ timer->stop();
+ timer->start(TIMER3);
+ }
+ if (timecount == TIMEC2) {
+ timer->stop();
+ timer->start(TIMER4);
+ }
+
+ switch (button) {
+ case Qt::LeftButton:
+ return;
+ case Qt::MidButton:
+ decValue(evx);
+ break;
+ case Qt::RightButton:
+ incValue(evx);
+ break;
+ default:
+ break;
+ }
+ }
+
+//---------------------------------------------------------
+// mouseReleaseEvent
+//---------------------------------------------------------
+
+void FloatEntry::mouseReleaseEvent(QMouseEvent*)
+ {
+ button = Qt::NoButton;
+ timer->stop();
+ }
+
+//---------------------------------------------------------
+// mouseMoveEvent
+//---------------------------------------------------------
+
+void FloatEntry::mouseMoveEvent(QMouseEvent*)
+ {
+ switch (button) {
+ case Qt::LeftButton:
+ break;
+ case Qt::MidButton:
+ break;
+ case Qt::RightButton:
+ break;
+ default:
+ break;
+ }
+ }
+
+//---------------------------------------------------------
+// mouseDoubleClickEvent
+//---------------------------------------------------------
+
+void FloatEntry::mouseDoubleClickEvent(QMouseEvent* event)
+ {
+ if (event->button() != Qt::LeftButton) {
+ mousePressEvent(event);
+ return;
+ }
+ setFocus();
+ QLineEdit::setFrame(true);
+ update();
+ }
+
+//---------------------------------------------------------
+// setValue
+//---------------------------------------------------------
+
+void FloatEntry::setValue(double val)
+ {
+ if (_log) {
+ if (val == 0.0f)
+ _value = _minValue;
+ else
+ _value = fast_log10(val) * 20.0f;
+ }
+ else
+ _value = val;
+ updateValue();
+ }
+
+//---------------------------------------------------------
+// updateValue
+//---------------------------------------------------------
+
+void FloatEntry::updateValue()
+ {
+ if (setString(_value)) {
+ // value is out of range:
+ if (_value > _maxValue)
+ _value = _maxValue;
+ else if (_value < _minValue)
+ _value = _minValue;
+ }
+ }
+
+//---------------------------------------------------------
+// value
+//---------------------------------------------------------
+
+double FloatEntry::value() const
+ {
+ double rv;
+ if (_log)
+ rv = pow(10.0, _value * 0.05f);
+ else
+ rv = _value;
+ return rv;
+ }
+}
+