Qt-----进度条QProgressBar

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1. //MyDlg.h  
2. #ifndef MYDLG_H  
3. #define MYDLG_H  
4. #include <QDialog>  
5. class QLabel;  
6. class QLineEdit;  
7. class QComboBox;  
8. class QProgressBar;  
9. class QPushButton;  
10. class QGridLayout;  
11. class MyDlg : public QDialog  
12. {  
13.   Q_OBJECT  
14. public:  
15.   MyDlg(QWidget *parent = 0);  
16. private slots:  
17.   void startProgress();  
18. private:  
19.   QLabel *fileNum;  
20.   QLineEdit *fileNumLineEdit;  
21.   QLabel *progressType;  
22.   QComboBox *comboBox;  
23.   QProgressBar *progressBar;  
24.   QPushButton *startBtn;  
25.   QGridLayout *mainLayout;  
26. };  
27. #endif // MYDLG_H  

//MyDlg.h#ifndef MYDLG_H#define MYDLG_H#include <QDialog>class QLabel;class QLineEdit;class QComboBox;class QProgressBar;class QPushButton;class QGridLayout;class MyDlg : public QDialog{  Q_OBJECTpublic:  MyDlg(QWidget *parent = 0);private slots:  void startProgress();private:  QLabel *fileNum;  QLineEdit *fileNumLineEdit;  QLabel *progressType;  QComboBox *comboBox;  QProgressBar *progressBar;  QPushButton *startBtn;  QGridLayout *mainLayout;};#endif // MYDLG_H

 

[cpp] view plaincopyprint?

1. //MyDlg.cpp  
2. #include <QDialog>  
3. #include <QLabel>  
4. #include <QLineEdit>  
5. #include <QComboBox>  
6. #include <QPushButton>  
7. #include <QProgressBar>  
8. #include <QProgressDialog>  
9. #include <QWidget>  
10. #include <QGridLayout>  
11. #include 'MyDlg.h'  
12. MyDlg::MyDlg(QWidget *parent) : QDialog(parent)  
13. {  
14.   setWindowTitle(tr('Progress'));  
15.   fileNum = new QLabel;  
16.   fileNum->setText(tr('文件数目：'));  
17.   fileNumLineEdit = new QLineEdit;  
18.   fileNumLineEdit->setText(tr('10000'));  
19.   progressType = new QLabel;  
20.   progressType->setText(tr('显示类型'));  
21.   comboBox = new QComboBox;  
22.   comboBox->addItem(tr('progressBar'));  
23.   comboBox->addItem(tr('progressDialog'));  
24.   progressBar = new QProgressBar;  
25.   startBtn = new QPushButton;  
26.   startBtn->setText(tr('开始'));  
27.   mainLayout = new QGridLayout(this);  
28.   mainLayout->addWidget(fileNum, 0, 0, 1, 1);  
29.   mainLayout->addWidget(fileNumLineEdit, 0, 1, 1, 1);  
30.   mainLayout->addWidget(progressType, 1, 0, 1, 1);  
31.   mainLayout->addWidget(comboBox, 1, 1, 1 ,1);  
32.   mainLayout->addWidget(progressBar, 2, 1, 1, 2);  
33.   mainLayout->addWidget(startBtn, 3, 1, 1, 1);  
34.   mainLayout->setMargin(15);  
35.   mainLayout->setSpacing(10);  
36.   connect(startBtn, SIGNAL(clicked()), this, SLOT(startProgress()));  
37. }  
38. void MyDlg::startProgress()  
39. {  
40.   bool ok;  
41.   int num = fileNumLineEdit->text().toInt(&ok);  
42.   if(!ok)  
43.   {  
44.       return ;  
45.   }  
46.   if(comboBox->currentIndex() == 0)  
47.   {  
48.       progressBar->setRange(0, num);  
49.       for(int i = 1; i <= num; i++)  
50.       {  
51.           progressBar->setValue(i);  
52.       }  
53.   }  
54.   else  
55.   {  
56.       QProgressDialog *progressDlg=new QProgressDialog(this);  
57.       QFont font('ZYSong18030',12);  
58.       progressDlg->setFont(font);  
59.       progressDlg->setWindowModality(Qt::WindowModal);  
60.       progressDlg->setMinimumDuration(5);  
61.       progressDlg->setWindowTitle(tr('please wait'));  
62.       progressDlg->setLabelText(tr('正在复制......     '));  
63.       progressDlg->setCancelButtonText(tr('取消'));  
64.       progressDlg->setRange(0,num);  
65.       for(int i = 1; i <= num; i++)  
66.       {  
67.           progressDlg->setValue(i);  
68.           if(progressDlg->wasCanceled())  
69.           {  
70.               return ;  
71.           }  
72.       }  
73.   }  
74. }  

//MyDlg.cpp#include <QDialog>#include <QLabel>#include <QLineEdit>#include <QComboBox>#include <QPushButton>#include <QProgressBar>#include <QProgressDialog>#include <QWidget>#include <QGridLayout>#include 'MyDlg.h'MyDlg::MyDlg(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, 1, 1);  mainLayout->addWidget(fileNumLineEdit, 0, 1, 1, 1);  mainLayout->addWidget(progressType, 1, 0, 1, 1);  mainLayout->addWidget(comboBox, 1, 1, 1 ,1);  mainLayout->addWidget(progressBar, 2, 1, 1, 2);  mainLayout->addWidget(startBtn, 3, 1, 1, 1);  mainLayout->setMargin(15);  mainLayout->setSpacing(10);  connect(startBtn, SIGNAL(clicked()), this, SLOT(startProgress()));}void MyDlg::startProgress(){  bool ok;  int num = fileNumLineEdit->text().toInt(&ok);  if(!ok)  {      return ;  }  if(comboBox->currentIndex() == 0)  {      progressBar->setRange(0, num);      for(int i = 1; i <= num; i++)      {          progressBar->setValue(i);      }  }  else  {      QProgressDialog *progressDlg=new QProgressDialog(this);      QFont font('ZYSong18030',12);      progressDlg->setFont(font);      progressDlg->setWindowModality(Qt::WindowModal);      progressDlg->setMinimumDuration(5);      progressDlg->setWindowTitle(tr('please wait'));      progressDlg->setLabelText(tr('正在复制......     '));      progressDlg->setCancelButtonText(tr('取消'));      progressDlg->setRange(0,num);      for(int i = 1; i <= num; i++)      {          progressDlg->setValue(i);          if(progressDlg->wasCanceled())          {              return ;          }      }  }}

 

 

[cpp] view plaincopyprint?

1. //main.cpp  
2. #include <QApplication>  
3. #include <QTextCodec>  
4. #include 'MyDlg.h'  
5. int main(int argc, char *argv[])  
6. {  
7.   QTextCodec::setCodecForTr(QTextCodec::codecForLocale());  
8.   QApplication app(argc, argv);  
9.   MyDlg md;  
10.   md.show();  
11.   return app.exec();  
12. }  

//main.cpp#include <QApplication>#include <QTextCodec>#include 'MyDlg.h'int main(int argc, char *argv[]){  QTextCodec::setCodecForTr(QTextCodec::codecForLocale());  QApplication app(argc, argv);  MyDlg md;  md.show();  return app.exec();}

 

程序运行截图：