QT中，QFileDialog,QColorDialog,QFontDialog,QInputDialog对话框的简单使用

定义BuiltInDialog.h

#ifndef BUILTINDIALOG_H #define BUILTINDIALOG_H #include <QDialog> #include <QTextEdit> #include <QPushButton> #include <QFileDialog> class QTextEdit; class QPushButton; QT_BEGIN_NAMESPACE namespace Ui { class BuiltInDialog; } QT_END_NAMESPACE class BuiltInDialog : public QDialog { Q_OBJECT public: BuiltInDialog(QWidget *parent = nullptr); ~BuiltInDialog(); private: QTextEdit *textEditDisplay; QPushButton *filePushButton; QPushButton *colorPushButton; QPushButton *fontPushButton; QPushButton *inputPushButton; QPushButton *closePushButton; QPushButton *progressPushButton; int num; private slots: void slotFile(); void slotColor(); void slotFont(); void slotInput(); void slotProgress(); }; #endif // BUILTINDIALOG_H

实现BuiltInDialog.cpp

#include "builtindialog.h" #include "ui_builtindialog.h" #include <QTextStream> #include <QColorDialog> #include <QFontDialog> #include <QInputDialog> #include <QProcess> #include <QProgressDialog> #include <windows.h> #include <QVBoxLayout> BuiltInDialog::BuiltInDialog(QWidget *parent) : QDialog(parent) { num = 0; textEditDisplay = new QTextEdit(); filePushButton = new QPushButton("打开"); colorPushButton = new QPushButton("颜色"); fontPushButton = new QPushButton("字体"); inputPushButton = new QPushButton("保存"); closePushButton = new QPushButton("关闭"); progressPushButton = new QPushButton("进度"); QVBoxLayout *rightLayout = new QVBoxLayout(); rightLayout->addWidget(filePushButton); rightLayout->addWidget(colorPushButton); rightLayout->addWidget(fontPushButton); rightLayout->addWidget(inputPushButton); rightLayout->addWidget(progressPushButton); rightLayout->addWidget(closePushButton); QHBoxLayout *mainLayout = new QHBoxLayout; mainLayout->addWidget(textEditDisplay); mainLayout->addLayout(rightLayout); setLayout(mainLayout); connect(filePushButton,SIGNAL(clicked()),this,SLOT(slotFile())); connect(colorPushButton,SIGNAL(clicked()),this,SLOT(slotColor())); connect(fontPushButton,SIGNAL(clicked()),this,SLOT(slotFont())); connect(inputPushButton,SIGNAL(clicked()),this,SLOT(slotInput())); connect(progressPushButton,SIGNAL(clicked()),this,SLOT(slotProgress())); connect(closePushButton,SIGNAL(clicked()),this,SLOT(close())); } BuiltInDialog::~BuiltInDialog() { } void BuiltInDialog::slotFile() { QString str = QFileDialog::getOpenFileName(this, tr("open file dialog"), QDir::home().path(), "Text files(*.txt)"); QFile file(str); if(!file.open(QIODevice::ReadWrite)){ return ; } QTextStream in(&file); while (!in.atEnd()) { QString line = in.readLine(); num++; textEditDisplay->append(line); } } void BuiltInDialog::slotColor() { QPalette palette = textEditDisplay->palette(); QColor color = QColorDialog::getColor(palette.color(QPalette::Text),this); if(color.isValid()){ palette.setColor(QPalette::Text,color); textEditDisplay->setPalette(palette); } } void BuiltInDialog::slotFont() { bool ok; QFont font = QFontDialog::getFont(&ok); if(ok){ textEditDisplay->setFont(font); } } void BuiltInDialog::slotInput() { bool ok; QString filePath = QInputDialog::getText(this,tr("Input Dialog"),tr("InputSavePath:"),QLineEdit::Normal,QDir::home().dirName(),&ok); if(!ok) return; QFile file(filePath); if(!file.open(QIODevice::WriteOnly | QIODevice::Text)){ return ; } QTextStream out(&file); QString a = textEditDisplay->toPlainText(); out << a << "\n"; } void BuiltInDialog::slotProgress() { QProgressDialog *progressDialog = new QProgressDialog(this); QFont font("ZYSong18030",12); progressDialog->setFont(font); progressDialog->setWindowModality(Qt::WindowModal); progressDialog->setMinimumDuration(10); progressDialog->setWindowTitle(tr("Copying.....")); progressDialog->setCancelButtonText(tr("Cancel")); progressDialog->setRange(0,num); for(int i = 1;i < num;i++){ progressDialog->setValue(i); qApp->processEvents(); Sleep(1); if(progressDialog->wasCanceled()) return ; } }