QT learning day 3: How to use QSlider

Create the project QSliderTest to
realize the function: click the button: reset the sliding box, slide the sliding box, and display the moving distance
. Add a horizontal and a vertical sliding box to the ui interface, and a button.

Add a signal slot
. Add code in QSliderTest.h

#pragma once

#include <QtWidgets/QWidget>
#include "ui_QSliderTest.h"

class QSliderTest : public QWidget
{
    
    
    Q_OBJECT

public:
    QSliderTest(QWidget *parent = Q_NULLPTR);
public slots:
	void Move(int);
	void Change(int);
	void Press();
	void Rel();
	void Click();
private:
    Ui::QSliderTestClass ui;
};

Add code in QSliderTest.cpp

#include "QSliderTest.h"
#include <QDebug>
QSliderTest::QSliderTest(QWidget *parent)
    : QWidget(parent)
{
    
    
    ui.setupUi(this);
}
//拖到滑块条
void QSliderTest::Move(int v)
{
    
    
	qDebug() << "Move" << v;
}
//点击，拖动，直接设置
void QSliderTest::Change(int v)
{
    
    
	qDebug() << "Change" << v;
}
//点击滑块
void QSliderTest::Press()
{
    
    
	qDebug() << "Press" << ui.horizontalSlider->value();
}
void QSliderTest::Rel()
{
    
    
	qDebug() << "Rel"<< ui.horizontalSlider->value();
}
void QSliderTest::Click()
{
    
    
	int v=ui.horizontalSlider->value() + 10;
	ui.horizontalSlider->setValue(300);
}

Set the slot function in the ui interface


Set the console output

Run the program

August 15, 2020 00:06:39