QSliderドラッグスライダvalueChanged(int value)信号を用いてスロット関数を繰り返し呼び出す問題解決
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bool m_sliderPressed
void sliderPressed()
void sliderReleased()
void valueChanged(int value)
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include
namespace Ui {
class MainWindow;
}
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
explicit MainWindow(QWidget *parent = 0);
~MainWindow();
void sliderValueChanged(int value);
private slots:
void on_horizontalSlider_valueChanged(int value);
void on_horizontalSlider_sliderPressed();
void on_horizontalSlider_sliderReleased();
private:
Ui::MainWindow *ui;
bool m_sliderPressed;
};
#endif//MAINWINDOW_H
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
m_sliderPressed = false;
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::sliderValueChanged(int value)
{
qDebug() << "sliderValueChanged:" << value;
ui->lineEdit->setText(QString::number(value));
}
void MainWindow::on_horizontalSlider_valueChanged(int value)
{
if(!m_sliderPressed)
{
sliderValueChanged(value);
}
}
void MainWindow::on_horizontalSlider_sliderPressed()
{
m_sliderPressed = true;
}
void MainWindow::on_horizontalSlider_sliderReleased()
{
m_sliderPressed = false;
int value = ui->horizontalSlider->value();
sliderValueChanged(value);
}