Qt对话框部分学习

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一、对话框部分常用内容
颜色对话框、文件对话框、字体对话框、输入对话框、消息对话框、进度对话框、错误对话框、向导对话框。

二、代码部分

//widget.h
#ifndef MYWIDGET_H
#define MYWIDGET_H
#include <QWidget>
#include <QWizard>
namespace Ui {
class MyWidget;
}
class MyWidget : public QWidget
{
Q_OBJECT
public:
explicit MyWidget(QWidget *parent = 0);
~MyWidget();
private slots:
void on_pushButton_clicked();
void on_pushButton_4_clicked();
void on_pushButton_2_clicked();
void on_pushButton_5_clicked();
void on_pushButton_3_clicked();
void on_pushButton_6_clicked();
void on_pushButton_7_clicked();
void on_pushButton_8_clicked();
private:
Ui::MyWidget *ui;
QWizardPage *createPage1();
QWizardPage *createPage2();
QWizardPage *createPage3();
};
#endif // MYWIDGET_H
//widget.cpp
#include "mywidget.h"
#include "ui_mywidget.h"
#include <QDebug>
#include <QColorDialog>
#include <QFileDialog>
#include <QFontDialog>
#include <QInputDialog>
#include <QMessageBox>
#include <QProgressDialog>
#include <QErrorMessage>
#include <QWizard>
MyWidget::MyWidget(QWidget *parent) :
QWidget(parent),
ui(new Ui::MyWidget)
{
ui->setupUi(this);
}
MyWidget::~MyWidget()
{
delete ui;
}
//颜色对话框
void MyWidget::on_pushButton_clicked()
{
// QColor color = QColorDialog::getColor(Qt::red, this, tr("颜色对话框"), QColorDialog::ShowAlphaChannel);
// qDebug()<<"color: "<<color;
QColorDialog dialog(Qt::red, this);
dialog.setOption(QColorDialog::ShowAlphaChannel);
dialog.exec();
QColor color = dialog.currentColor();
qDebug()<<"color:"<<color;
}
//文本对话框
void MyWidget::on_pushButton_4_clicked()
{
QString filename = QFileDialog::getOpenFileName(this, tr("文件对话框"), "E:", tr("文本文件(*txt)"));
qDebug()<<"fileName:"<<filename;
}
//字体对话框
void MyWidget::on_pushButton_2_clicked()
{
bool ok;
QFont font = QFontDialog::getFont(&ok, this);
if(ok) ui->pushButton_2->setFont(font);
else qDebug()<<tr("没有选择字体！");
}
//输入对话框
void MyWidget::on_pushButton_5_clicked()
{
bool ok;
QString string = QInputDialog::getText(this, tr("输入字符串对话框"),
tr("请输入用户名："), QLineEdit::Normal, tr("admin"), &ok);
if(ok) qDebug()<<"string:"<<string;
//获取整数
int value1 = QInputDialog::getInt(this, tr("输入整数对话框"),
tr("请输入-1000到1000之间的数值"), 100, -1000, 1000, 10, &ok);
if(ok) qDebug()<<"value1:"<<value1;
//获取浮点数
double value2 = QInputDialog::getDouble(this, tr("输入浮点数对话框"),
tr("请输入-1000到1000之间的数值"), 0.00, -1000, 1000, 2, &ok);
if(ok) qDebug()<<"value2:"<<value2;
QStringList items;
items<<tr("条目1")<<tr("条目2");
//获取条目
QString item = QInputDialog::getItem(this, tr("输入条目对话框"),
tr("请选择一个条目"), items, 0, true, &ok);
if(ok) qDebug()<<"item:"<<item;
}
//消息对话框
void MyWidget::on_pushButton_3_clicked()
{
//问题对话框
int ret1 = QMessageBox::question(this, tr("问题对话框"),
tr("你了解Qt吗？"), QMessageBox::Yes, QMessageBox::No);
if(ret1 == QMessageBox::Yes) qDebug()<<tr("问题！");
//提示对话框
int ret2 = QMessageBox::information(this, tr("提示对话框"),
tr("这是Qt书籍！"), QMessageBox::Ok);
if(ret2 == QMessageBox::Ok) qDebug()<<tr("提示！");
//警告对话框
int ret3 = QMessageBox::warning(this, tr("警告对话框"),
tr("不能提前结束！"), QMessageBox::Abort);
if(ret3 == QMessageBox::Abort) qDebug()<<tr("警告！");
//错误对话框
int ret4 = QMessageBox::critical(this, tr("严重错误对话框"),
tr("发现一个严重错误！现在要关闭所有文件！"), QMessageBox::YesAll);
if(ret4 == QMessageBox::YesAll) qDebug()<<tr("错误！");
//关于对话框
QMessageBox::about(this, tr("关于对话框"),
tr("yafeilinux.com致力于Qt及Qt Creator的普及工作！"));
}
//进度对话框
void MyWidget::on_pushButton_6_clicked()
{
QProgressDialog dialog(tr("文件复制进度"), tr("取消"), 0, 50000, this);
dialog.setWindowTitle(tr("进度对话框"));
dialog.setWindowModality(Qt::WindowModal);
dialog.show();
for(int i=0;i<50000;i++) {
dialog.setValue(i);
QCoreApplication::processEvents();
if(dialog.wasCanceled()) break;
}
dialog.setValue(50000);
qDebug()<<tr("复制结束！");
}
//错误对话框
void MyWidget::on_pushButton_7_clicked()
{
QErrorMessage *dialog = new QErrorMessage(this);
dialog->setWindowTitle(tr("错误信息对话框"));
dialog->showMessage(tr("这里是出错信息！"));
}
QWizardPage *MyWidget::createPage1()
{
QWizardPage *page = new QWizardPage;
page->setTitle(tr("介绍"));
return page;
}
QWizardPage *MyWidget::createPage2()
{
QWizardPage *page = new QWizardPage;
page->setTitle(tr("用户选择信息"));
return page;
}
QWizardPage *MyWidget::createPage3()
{
QWizardPage *page = new QWizardPage;
page->setTitle(tr("结束"));
return page;
}
//相对对话框
void MyWidget::on_pushButton_8_clicked()
{
QWizard wizard(this);
wizard.setWindowTitle(tr("向导对话框"));
wizard.addPage(createPage1());
wizard.addPage(createPage2());
wizard.addPage(createPage3());
wizard.exec();
}

main.cpp:

#include "mywidget.h"
#include <QApplication>
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
MyWidget w;
w.show();
return a.exec();
}

ui样子

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