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plasma: implement number increment/decrement on mouse wheel event for calculator applet

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Signed-off-by: Ivailo Monev <xakepa10@gmail.com>
This commit is contained in:
Ivailo Monev 2024-05-06 01:20:43 +03:00
parent 0250ec678e
commit 89773cc69c
2 changed files with 24 additions and 8 deletions
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28
plasma/applets/calculator/calculator.cpp
View file

@ -28,11 +28,12 @@
static const QString s_decimal = QString::fromLatin1(".");
static const QLatin1String s_zero = QLatin1String("0");
// hard-limit
static const int s_limit = 6;
static QString kAddNumber(const QString &string, const ushort number)
static QString kAddNumber(const QString &string, const short number)
{
if (string.size() > 6) {
// hard-limit
if (string.size() > s_limit) {
return string;
}
if (string == s_zero) {
@ -63,6 +64,8 @@ public:
CalculatorAppletWidget(QGraphicsWidget *parent);
void addToNumber(const short number);
public Q_SLOTS:
void slotClear();
void slotDiv();
@ -294,6 +297,11 @@ CalculatorAppletWidget::CalculatorAppletWidget(QGraphicsWidget *parent)
);
}
void CalculatorAppletWidget::addToNumber(const short number)
{
m_label->setText(QString::number(m_label->text().toFloat() + number));
}
void CalculatorAppletWidget::slotClear()
{
m_label->setText(QString::fromLatin1("0"));
@ -466,10 +474,6 @@ QGraphicsWidget* CalculatorApplet::graphicsWidget()
return m_calculatorwidget;
}
// TODO: two ideas come into mind:
// 1. increment/decrement the number on mouse wheel event
// 2. instead of calling slots directly trigger buttons press and then release as indicator why the
// number changed (even tho it will happen very quickly)
void CalculatorApplet::keyPressEvent(QKeyEvent *event)
{
bool eventhandled = false;
@ -577,5 +581,15 @@ void CalculatorApplet::keyPressEvent(QKeyEvent *event)
}
}
void CalculatorApplet::wheelEvent(QGraphicsSceneWheelEvent *event)
{
event->ignore();
if (event->delta() > 0) {
m_calculatorwidget->addToNumber(1);
} else {
m_calculatorwidget->addToNumber(-1);
}
}
#include "moc_calculator.cpp"
#include "calculator.moc"

4
plasma/applets/calculator/calculator.h
View file

@ -19,6 +19,7 @@
#ifndef CALCULATOR_H
#define CALCULATOR_H
#include <QGraphicsSceneWheelEvent>
#include <Plasma/PopupApplet>
class CalculatorAppletWidget;
@ -34,8 +35,9 @@ public:
QGraphicsWidget* graphicsWidget() final;
protected:
// QGraphicsWidget reimplementation
// QGraphicsWidget reimplementations
void keyPressEvent(QKeyEvent *event) final;
void wheelEvent(QGraphicsSceneWheelEvent *event) final;
private:
friend CalculatorAppletWidget;