QT标准对话框

来源：互联网发布：ubuntu下制作启动u盘编辑：程序博客网时间：2024/05/21 19:28

初学QT，完全没有一点概念，在一本书上面看了几遍代码，刚刚对QT有一个简单的认识，与大家分享一下书上面的代码

//CommonDialog.h#ifndef COMMONDIALOG_H#define COMMONDIALOG_H#include <QDialog>class QPushButton;class QLineEdit;class QFrame;class QGridLayout;class StandardDialogs:public QDialog{  Q_OBJECTpublic:  StandardDialogs(QWidget *parent = 0, Qt::WindowFlags f = 0);  ~StandardDialogs();public:  QGridLayout *layout;  QPushButton *filePushButton;  QPushButton *colorPushButton;  QPushButton *fontPushButton;  QLineEdit *fileLineEdit;  QLineEdit *fontLineEdit;  QFrame *colorFrame;private slots:  void slotOpenFileDlg();  void slotOpenColorDlg();  void slotOpenFontDlg();};#endif // COMMONDIALOG_H

//CommonDialog.cpp#include "CommonDialog.h"#include <QtGui>StandardDialogs::StandardDialogs(QWidget *parent, Qt::WindowFlags f):QDialog(parent, f){  setWindowTitle(tr("Standard Dialogs"));  layout = new QGridLayout(this);  filePushButton = new QPushButton;  filePushButton->setText(tr("File Dialog"));  colorPushButton = new QPushButton;  colorPushButton->setText(tr("Color Dialog"));  fontPushButton = new QPushButton;  fontPushButton->setText(tr("Font Dialog"));  fileLineEdit = new QLineEdit;  colorFrame = new QFrame;  colorFrame->setFrameShape(QFrame::Box);  colorFrame->setAutoFillBackground(true);  fontLineEdit = new QLineEdit;  fontLineEdit->setText(tr("Hello World"));  layout->addWidget(filePushButton, 0, 0);  layout->addWidget(fileLineEdit, 0, 1);  layout->addWidget(colorPushButton, 1, 0);  layout->addWidget(colorFrame, 1, 1);  layout->addWidget(fontPushButton, 2, 0);  layout->addWidget(fontLineEdit, 2, 1);  layout->setMargin(15);  layout->setSpacing(10);  connect(filePushButton, SIGNAL(clicked()), this, SLOT(slotOpenFileDlg()));  connect(colorPushButton, SIGNAL(clicked()), this, SLOT(slotOpenColorDlg()));  connect(fontPushButton, SIGNAL(clicked()), this, SLOT(slotOpenFontDlg()));}StandardDialogs::~StandardDialogs(){}void StandardDialogs::slotOpenFileDlg(){  QString s = QFileDialog::getOpenFileName(                  this,                  "open file dialog",                  "/",                  "C++ files(*.cpp);;C files(*.c);;Head files(*.h)");  fileLineEdit->setText(s.toAscii());}void StandardDialogs::slotOpenColorDlg(){  QColor color = QColorDialog::getColor(Qt::blue);  if(color.isValid())  {      colorFrame->setPalette(QPalette(color));  }}void StandardDialogs::slotOpenFontDlg(){  bool ok;  QFont font = QFontDialog::getFont(&ok);  if(ok)  {      fontLineEdit->setFont(font);  }}

//main.cpp#include <QApplication>#include "CommonDialog.h"int main(int argc, char *argv[]){  QApplication app(argc, argv);  StandardDialogs *sd = new StandardDialogs;  sd->show();  return app.exec();}

程序运行截图：