Qt开发——QProgressBar/QProgressDialog进度条

目录

QProgressBar效果图：

QProgressDialog效果图：

进度条模态方式+模拟文件复制

progressdlg.h

progressdlg.cpp

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QProgressBar效果图：

QProgressDialog效果图：

进度条模态方式+模拟文件复制

progressdlg.h

#ifndef PROGRESSDLG_H
#define PROGRESSDLG_H

#include <QDialog>
#include <QLabel>
#include <QProgressBar>
#include <QPushButton>
#include <QGridLayout>
#include <QComboBox>
#include <QLineEdit>
#include <QFont>
#include <QProgressDialog>

class ProgressDlg : public QDialog
{
    Q_OBJECT

public:
    ProgressDlg(QWidget *parent = nullptr);
    ~ProgressDlg();

private:
   QLabel *FileNum;
   QLineEdit *FileNumLineEdit;
   QLabel *ProgressType;
   QComboBox *comboBox;
   QProgressBar *progressBar;
   QPushButton *startBtn;
   QGridLayout *mainLayout;

private slots:
     void startProgress();

};

#endif // PROGRESSDLG_H

progressdlg.cpp

#include "progressdlg.h"

ProgressDlg::ProgressDlg(QWidget *parent)
    : QDialog(parent)
{
    QFont font("ZYSong18030",12);
    setFont(font);//设置字体
    setWindowTitle(QStringLiteral("进度条"));
    setWindowIcon(QIcon("icon.png"));//设置程序图标
    FileNum =new QLabel;
    FileNum->setText(QStringLiteral("文件数目"));
    FileNumLineEdit=new QLineEdit;
    FileNumLineEdit->setText(QStringLiteral("100000"));
    ProgressType = new QLabel;
    ProgressType->setText(QStringLiteral("显示类型"));
    comboBox = new QComboBox;
    comboBox->addItem(QStringLiteral("progressBar"));
    comboBox->addItem(QStringLiteral("progressDialog"));
    progressBar = new QProgressBar;
    startBtn = new QPushButton();
    startBtn->setText(QStringLiteral("开始"));
    //布局设计
    mainLayout = new QGridLayout(this);
    mainLayout->addWidget(FileNum,0,0);
    mainLayout->addWidget(FileNumLineEdit,0,1);
    mainLayout->addWidget(ProgressType,1,0);
    mainLayout->addWidget(comboBox,1,1);
    mainLayout->addWidget(progressBar,2,0,1,2);
    mainLayout->addWidget(startBtn,3,1);
    mainLayout->setMargin(25);
    mainLayout->setSpacing(10);
    //事件关联
    connect(startBtn,SIGNAL(clicked()),this,SLOT(startProgress()));
}

ProgressDlg::~ProgressDlg()
{

}

void ProgressDlg::startProgress(){

    bool ok;
    int num=FileNumLineEdit->text().toInt(&ok);//获取当前复制文件数目
    if(comboBox->currentIndex()==0){//采用进度条形式显示进度
        progressBar->setRange(0,num);//设置步进范围
        for(int i=1;i<num+1;i++){
            progressBar->setValue(i);//模拟每个文件复制的过程
        }
    }
    else if(comboBox->currentIndex()==1){//采用进度对话框显示进度
        QProgressDialog *progressDialog=new QProgressDialog(this);//创建一个进度对话框
        QFont font("ZYSong18030",12);
        progressDialog->setFont(font);//设置字体
        progressDialog->setWindowIcon(QIcon("icon.png"));//设置程序图标
        progressDialog->setWindowModality(Qt::WindowModal);//设置进度对话框采用模态方式进行显示
        progressDialog->setMinimumDuration(3);//设置对话框出现等待时间
        progressDialog->setWindowTitle(QStringLiteral("玩命加载…"));
        progressDialog->setLabelText(QStringLiteral("复制中…"));
        progressDialog->setCancelButtonText(QStringLiteral("取消"));
        progressDialog->setRange(0,num);
        for(int i=1;i<num+1;i++){
            progressDialog->setValue(i);//模拟文件复制过程
            if(progressDialog->wasCanceled()){//检测是否取消
                return;//取消后结束程序
            }
        }
    }

}