Qt dialog
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1464145959
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@ -1,11 +1,13 @@
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#include "mainwindow.h"
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#include "mainwindow2.h"
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#include "mainwindow3.h"
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#include <QApplication>
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int main(int argc, char *argv[])
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{
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QApplication a(argc, argv);
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MainWindow w;
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MainWindow3 w;
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w.show();
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return a.exec();
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}
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#include "mainwindow2.h"
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#include <QDebug>
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#include <QFileDialog>
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MainWindow2::MainWindow2(QWidget *parent) : QMainWindow(parent)
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{
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setWindowTitle("对话框学习中...");
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setWindowIcon(QIcon(":/icon/open"));
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resize(1200,960);
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mEdit = new QTextEdit(this);
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mEdit->close();
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setCentralWidget(mEdit);
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setCentralWidget(new QTextEdit(this));
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QStatusBar *status_bar = new QStatusBar(this);
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btn1 = new QPushButton("按钮1",status_bar);
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btn2 = new QPushButton("按钮2",status_bar);
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btn3 = new QPushButton("按钮3",status_bar);
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btn4 = new QPushButton("定制MessageBox",status_bar);
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btn5 = new QPushButton("button5",status_bar);
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status_bar->addWidget(btn1);
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status_bar->addWidget(btn2);
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status_bar->addWidget(btn3);
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status_bar->addWidget(btn4);
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status_bar->addWidget(btn5);
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setStatusBar(status_bar);
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connect(btn1,&QPushButton::clicked,[&](){
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QDialog dialog;
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dialog.setWindowTitle(tr("自定义对话框 %1").arg(1));
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// dialog.exec(); // 应用级别的模态对话框
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dialog.show();
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});
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// connect(btn2,&QPushButton::clicked,[&](){
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// QDialog *dialog = new QDialog(this);
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// dialog->setWindowTitle(tr("自定义对话框 %1").arg(2));
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// dialog->setAttribute(Qt::WA_DeleteOnClose); // 当关闭对话时，自动释放堆空间
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// dialog->open(); // 窗口级别的模态对话框
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// });
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// connect(btn3,&QPushButton::clicked,[&](){
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// QDialog *dialog = new QDialog(this);
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// dialog->setWindowTitle(tr("自定义对话框 %1").arg(3));
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// dialog->setAttribute(Qt::WA_DeleteOnClose); // 当关闭对话时，自动释放堆空间
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// dialog->show(); // 窗口级别的非模态对话框
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// });
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connect(btn2,&QPushButton::clicked,[&](){
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QMessageBox::warning(this,"警告","你的操作可能会失败...");
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});
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connect(btn3,&QPushButton::clicked,[&](){
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// QMessageBox::StandardButton ret;
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// ret = QMessageBox::question(this,"询问","选什么内容？");
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// if(ret == QMessageBox::Yes)
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// qDebug()<<"选了行";
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// else
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// qDebug()<<"没选行";
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// QMessageBox::critical(this,"警告","太警告了");
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QMessageBox::information(this,"info","no info",QMessageBox::NoButton,QMessageBox::Apply);
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});
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connect(btn4,&QPushButton::clicked,[&](){
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QMessageBox *msgBox = new QMessageBox(this);
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msgBox->setAttribute(Qt::WA_DeleteOnClose);
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// msgBox->setIcon(QMessageBox::Critical);
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// msgBox->setWindowTitle("自定义错误提示");
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msgBox->setText("Error");
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msgBox->setInformativeText("An error occurred while processing the request.");
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msgBox->setStandardButtons(QMessageBox::Save|QMessageBox::Discard|QMessageBox::Cancel);
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msgBox->setDefaultButton(QMessageBox::Cancel);
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int ret = msgBox->exec(); // 会返回一个 int
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switch (ret) {
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case QMessageBox::Ok:
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qDebug()<<"Ok";
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break;
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case QMessageBox::Yes:
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qDebug()<<"Yes";
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break;
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case QMessageBox::No:
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qDebug()<<"No";
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break;
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}
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});
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connect(btn5,&QPushButton::clicked,[&](){
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// if(QMessageBox::Yes == QMessageBox::question(
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// this,
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// tr("Question"),
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// tr("Are you OK?"),
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// QMessageBox::Yes|QMessageBox::No,
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// QMessageBox::Yes))
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// {
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// QMessageBox::information(this,tr("Hmmm..."),
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// tr("I'm glad to hear that!"));
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// }
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// else{
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// QMessageBox::information(this,
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// tr("Hmmm..."),
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// tr("I'm sorry!"));
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// }
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QMessageBox msgBox;
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});
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}
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@ -0,0 +1,26 @@
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#ifndef MAINWINDOW2_H
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#define MAINWINDOW2_H
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#include <QMainWindow>
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#include <QDialog>
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#include <QTextEdit>
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#include <QPushButton>
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#include <QStatusBar>
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#include <QMessageBox>
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#include <QTextEdit>
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class MainWindow2 : public QMainWindow
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{
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Q_OBJECT
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QPushButton *btn1,*btn2,*btn3,*btn4,*btn5;
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QTextEdit *mEdit;
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public:
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explicit MainWindow2(QWidget *parent = nullptr);
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public:
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signals:
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};
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#endif // MAINWINDOW2_H
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@ -0,0 +1,72 @@
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#include "mainwindow3.h"
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MainWindow3::MainWindow3(QWidget *parent) : QMainWindow(parent)
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{
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setWindowTitle("对话框学习中...");
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setWindowIcon(QIcon(":/icon/start"));
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resize(1200, 960);
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mEdit = new QTextEdit(this);
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//mEdit->close();
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setCentralWidget(mEdit);
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QStatusBar *bar = new QStatusBar(this);
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btn1 = new QPushButton("打开文本文件", bar);
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btn2 = new QPushButton("保存文本文件", bar);
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btn3 = new QPushButton("颜色对话框", bar);
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btn4 = new QPushButton("字体对话框", bar);
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bar->addWidget(btn1);
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bar->addWidget(btn2);
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bar->addWidget(btn3);
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bar->addWidget(btn4);
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connect(btn1, &QPushButton::clicked, [&](){
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// 获取待打开的文件名 (已存在的文件)
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// QString fileName = QFileDialog::getOpenFileName(this, "选择图片文件", ".", "Png(*.png);;Jpeg(*.jpg)");
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QString fileName = QFileDialog::getOpenFileName(this, "选择文本文件", ".", "Text(*.txt)");
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qDebug() << "打开文件的位置：" << fileName ;
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QFile file(fileName);
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if(!file.open(QIODevice::ReadOnly|QIODevice::Text)){
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// 以只读文本的模式打开文件失败
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QMessageBox::critical(this, "错误", fileName+" 打开失败!");
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return;
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}
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QTextStream in(&file);
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mEdit->setText(in.readAll());
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file.close();
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});
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connect(btn2, &QPushButton::clicked, [&](){
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// 保存文件时，获取待保存的文件名 （可以是新文件）
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// QString fileName = QFileDialog::getSaveFileName(this,"保存文件位置",".");
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QString fileName = QFileDialog::getSaveFileName(this,"保存文件位置","d:/", "Text(*.txt)");
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qDebug() << "保存文件的位置: " << fileName ;
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QFile file(fileName);
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if(!file.open(QIODevice::WriteOnly|QIODevice::Text)){
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QMessageBox::critical(this, "错误", fileName+" 保存失败!");
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return;
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}
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QTextStream out(&file);
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// 将文本编辑控件 mEdit 中的文本写入到文件中。
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out << mEdit->toPlainText(); // 调用 mEdit->toPlainText() 将返回编辑控件中的纯文本内容
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file.close();
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});
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connect(btn3, &QPushButton::clicked, [&](){
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QColor color = QColorDialog::getColor(Qt::black,this,"字体颜色选择");
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mEdit->setTextBackgroundColor(color);
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// mEdit->setTextColor(color); // 条件: 光标选中的文本来设置颜色
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});
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connect(btn4, &QPushButton::clicked, [&](){
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bool yes = true;
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QFont font = QFontDialog::getFont(&yes,this);
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mEdit->setCurrentFont(font);
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});
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setStatusBar(bar);
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}
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@ -0,0 +1,29 @@
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#ifndef MAINWIDGET3_H
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#define MAINWIDGET3_H
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#include <QMainWindow>
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#include <QDialog>
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#include <QTextEdit>
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#include <QPushButton>
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#include <QStatusBar>
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#include <QMessageBox>
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#include <QTextEdit>
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#include <QTextStream>
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#include <QFileDialog>
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#include <QColorDialog>
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#include <QFontDialog>
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#include <QDebug>
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class MainWindow3 : public QMainWindow
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{
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Q_OBJECT
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QPushButton *btn1,*btn2,*btn3,*btn4,*btn5;
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QTextEdit *mEdit;
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public:
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explicit MainWindow3(QWidget *parent = nullptr);
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signals:
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};
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#endif // MAINWIDGET3_H
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@ -18,10 +18,14 @@ DEFINES += QT_DEPRECATED_WARNINGS
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SOURCES += \
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main.cpp \
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mainwindow.cpp \
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mainwindow2.cpp \
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mainwindow3.cpp \
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widget1.cpp
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HEADERS += \
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mainwindow.h \
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mainwindow2.h \
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mainwindow3.h \
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widget1.h
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# Default rules for deployment.
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