82 lines
2.0 KiB
C++
82 lines
2.0 KiB
C++
#include "siunitedit.h"
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#include <QDoubleValidator>
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#include <unit.h>
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#include <QEvent>
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#include <QKeyEvent>
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SIUnitEdit::SIUnitEdit(QString unit, QString prefixes, int precision, QWidget *parent)
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: QLineEdit(parent)
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{
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this->unit = unit;
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this->prefixes = prefixes;
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this->precision = precision;
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setAlignment(Qt::AlignCenter);
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installEventFilter(this);
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setValidator(new QDoubleValidator);
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connect(this, &QLineEdit::editingFinished, [this]() {
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parseNewValue(1.0);
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});
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}
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SIUnitEdit::SIUnitEdit(QWidget *parent)
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: SIUnitEdit("", " ", 4, parent)
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{
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}
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void SIUnitEdit::setValue(double value)
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{
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setValueQuiet(value);
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emit valueChanged(value);
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emit valueUpdated(this);
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}
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bool SIUnitEdit::eventFilter(QObject *, QEvent *event)
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{
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if (event->type() == QEvent::KeyPress) {
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int key = static_cast<QKeyEvent *>(event)->key();
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if(key == Qt::Key_Escape) {
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// abort editing process and set old value
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setValueQuiet(_value);
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clearFocus();
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return true;
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}
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if(key == Qt::Key_Return) {
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// use new value without prefix
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parseNewValue(1.0);
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return true;
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}
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auto mod = static_cast<QKeyEvent *>(event)->modifiers();
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if (!(mod & Qt::ShiftModifier)) {
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key = tolower(key);
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}
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if(key <= 255 && prefixes.indexOf(key) >= 0) {
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// a valid prefix key was pressed
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parseNewValue(Unit::SIPrefixToFactor(key));
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return true;
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}
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} else if(event->type() == QEvent::FocusOut) {
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if(!text().isEmpty()) {
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parseNewValue(1.0);
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} else {
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setValueQuiet(_value);
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}
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}
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return false;
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}
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void SIUnitEdit::setValueQuiet(double value)
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{
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_value = value;
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clear();
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setPlaceholderText(Unit::ToString(value, unit, prefixes, precision));
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}
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void SIUnitEdit::parseNewValue(double factor)
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{
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double v = text().toDouble() * factor;
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setValue(v);
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clearFocus();
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}
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