Qt学习——进度条QProgressBar/QProgressDialog类 .

 

两种进度条显示：

QProgressBar和QProgressDialog

下面例子展示两种进度条：

     

代码：

头文件dialog.h中：

#include
#include
#include
#include
#include
#include
#include
class Dialog : public QDialog
{
    Q_OBJECT

public:
    Dialog(QWidget *parent = 0);
    ~Dialog();
private slots:
    void startProgress();
private:
    QLabel *FileNum;
    QLineEdit *FileNumLineEdit;
    QLabel *ProgressType;
    QComboBox *comboBox;
    QProgressBar *progressBar;
    QPushButton *startBtn;
    QGridLayout *mainLayout;
};

#include #include #include #include #include #include #include class Dialog : public QDialog { Q_OBJECT public: Dialog(QWidget *parent = 0); ~Dialog(); private slots: void startProgress(); private: QLabel *FileNum; QLineEdit *FileNumLineEdit; QLabel *ProgressType; QComboBox *comboBox; QProgressBar *progressBar; QPushButton *startBtn; QGridLayout *mainLayout; };
源文件：

#include "dialog.h"
#include
#include

Dialog::Dialog(QWidget *parent)
    : QDialog(parent)
{
    setWindowTitle(tr("Progress"));

    FileNum=new QLabel;
    FileNum->setText(tr("文件数目:"));
    FileNumLineEdit=new QLineEdit;
    FileNumLineEdit->setText(tr("10000"));

    ProgressType=new QLabel;
    ProgressType->setText(tr("显示类型："));
    comboBox=new QComboBox;
    comboBox->addItem(tr("progressBar"));
    comboBox->addItem(tr("progressDialog"));

    progressBar=new QProgressBar;

    startBtn=new QPushButton;
    startBtn->setText(tr("开始"));

    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(15);
    mainLayout->setSpacing(10);

    connect(startBtn,SIGNAL(clicked()),this,SLOT(startProgress()));
}

#include "dialog.h" #include #include Dialog::Dialog(QWidget *parent) : QDialog(parent) { setWindowTitle(tr("Progress")); FileNum=new QLabel; FileNum->setText(tr("文件数目:")); FileNumLineEdit=new QLineEdit; FileNumLineEdit->setText(tr("10000")); ProgressType=new QLabel; ProgressType->setText(tr("显示类型：")); comboBox=new QComboBox; comboBox->addItem(tr("progressBar")); comboBox->addItem(tr("progressDialog")); progressBar=new QProgressBar; startBtn=new QPushButton; startBtn->setText(tr("开始")); 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(15); mainLayout->setSpacing(10); connect(startBtn,SIGNAL(clicked()),this,SLOT(startProgress())); }
main函数添加显示中文的代码：

#include
#include "dialog.h"
#include
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    QTextCodec::setCodecForTr(QTextCodec::codecForLocale());
    Dialog w;
    w.show();

    return a.exec();
}