1 files changed, 137 insertions, 0 deletions
diff --git a/sigmodr/corewidgets/FractionWidget.cpp b/sigmodr/corewidgets/FractionWidget.cpp
new file mode 100644
index 00000000..36a9a9ea
--- /dev/null
+++ b/sigmodr/corewidgets/FractionWidget.cpp
@@ -0,0 +1,137 @@
+/*
+ * Copyright 2008-2009 Ben Boeckel <MathStuf@gmail.com>
+ * 
+ * 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 3 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, see <http://www.gnu.org/licenses/>.
+ */
+
+// Header include
+#include "FractionWidget.h"
+#include "FractionWidget_p.h"
+
+// KDE includes
+#include <KIntNumInput>
+#include <KLineEdit>
+
+// Qt includes
+#include <QtCore/QFile>
+#include <QtGui/QVBoxLayout>
+#include <QtUiTools/QUiLoader>
+
+// C includes
+#include <climits>
+
+using namespace Sigcore;
+using namespace Sigmodr::CoreWidgets;
+
+FractionWidget::Private::Private(QObject* parent, const Fraction& value) :
+        QObject(parent),
+        m_value(value),
+        m_behavior(Any)
+{
+}
+
+QWidget* FractionWidget::Private::makeWidgets(FractionWidget* widget)
+{
+    QFile file(":/gui/fraction.ui");
+    file.open(QFile::ReadOnly);
+    QWidget *formWidget = QUiLoader().load(&file, widget);
+    file.close();
+    ui_numerator = formWidget->findChild<KIntNumInput*>("varNumerator");
+    ui_denominator = formWidget->findChild<KIntNumInput*>("varDenominator");
+    ui_value = formWidget->findChild<KLineEdit*>("varValue");
+    connect(ui_numerator, SIGNAL(valueChanged(int)), this, SLOT(numeratorChanged(int)));
+    connect(ui_denominator, SIGNAL(valueChanged(int)), this, SLOT(denominatorChanged(int)));
+    connect(this, SIGNAL(valueChanged(Sigcore::Fraction)), widget, SIGNAL(valueChanged(Sigcore::Fraction)));
+    connect(this, SIGNAL(valueChanged(Sigcore::Fraction)), this, SLOT(updateValue()));
+    connect(this, SIGNAL(valueChanged(Sigcore::Fraction)), this, SLOT(resetRanges()));
+    connect(widget, SIGNAL(behaviorChanged(Behavior)), this, SLOT(resetRanges()));
+    updateValue();
+    return formWidget;
+}
+
+void FractionWidget::Private::numeratorChanged(const int numerator)
+{
+    m_value.setNumerator(numerator);
+    emit(valueChanged(m_value));
+}
+
+void FractionWidget::Private::denominatorChanged(const int denominator)
+{
+    m_value.setDenominator(denominator);
+    emit(valueChanged(m_value));
+}
+
+void FractionWidget::Private::updateValue()
+{
+    ui_value->setText(QString::number(double(m_value), 'g', 7));
+}
+
+void FractionWidget::Private::resetRanges()
+{
+    ui_numerator->setValue(m_value.numerator());
+    ui_denominator->setValue(m_value.denominator());
+    int numMin = 0;
+    int numMax = INT_MAX;
+    int denomMin = 1;
+    int denomMax = INT_MAX;
+    switch (m_behavior)
+    {
+        case NonZero:
+            numMin = 1;
+        case Proper:
+            numMax = m_value.denominator();
+            break;
+        case Improper:
+            denomMax = m_value.numerator();
+        case AnyButZero:
+            numMin = 1;
+        default:
+            break;
+    }
+    ui_numerator->setRange(numMin, numMax);
+    ui_denominator->setRange(denomMin, denomMax);
+}
+
+FractionWidget::FractionWidget(QWidget* parent, const Fraction& value) :
+        QWidget(parent),
+        d(new Private(this, value))
+{
+    QVBoxLayout* layout = new QVBoxLayout;
+    layout->addWidget(d->makeWidgets(this));
+    setLayout(layout);
+}
+
+FractionWidget::Behavior FractionWidget::behavior() const
+{
+    return d->m_behavior;
+}
+
+Fraction FractionWidget::value() const
+{
+    return d->m_value;
+}
+
+void FractionWidget::setBehavior(const Behavior behavior)
+{
+    d->m_behavior = behavior;
+    emit(behaviorChanged(d->m_behavior));
+}
+
+void FractionWidget::setValue(const Fraction& value)
+{
+    if (d->m_value == value)
+        return;
+    d->m_value = value;
+    emit(valueChanged(d->m_value));
+}