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中企动力是什么公司,荆州网站seo,阿里云如何查看已建设好的网站,中国四川机械加工网今天来看一下QT中标准对话框的一些操作第一步 ： 建立一个Qdialog的工程父类选择为Qdialog 第二步： 设计ui界面大概如图所示，最下面那个控件是PlainTextEdit,这个界面不美观，但是我们的重点在于解释这些按钮绑定的事件项目的…

今天来看一下QT中标准对话框的一些操作
第一步： 建立一个Qdialog的工程父类选择为Qdialog
第二步： 设计ui界面
在这里插入图片描述

大概如图所示，最下面那个控件是PlainTextEdit,这个界面不美观，但是我们的重点在于解释这些按钮绑定的事件
项目的大致结构如下：
在这里插入图片描述
**第三步:**直接复制我的这些代码到你的dialog.h中

#ifndef DIALOG_H
#define DIALOG_H#include <QDialog>
#include <QDir>
#include <QFileDialog>
#include <QColorDialog>
#include <QFontDialog>
#include <QInputDialog>
#include <QMessageBox>
#pragma execution_character_set("utf-8")
namespace Ui {
class Dialog;
}class Dialog : public QDialog
{Q_OBJECTpublic:explicit Dialog(QWidget *parent = 0);~Dialog();private slots:void on_btn_open1_clicked();void on_btn_openmany_clicked();void on_btn_chooselist_clicked();void on_btn_save_clicked();void on_btn_color_clicked();void on_btn_font_clicked();void on_btn_char_clicked();void on_btn_int_clicked();void on_btn_float_clicked();void on_btn_select_clicked();void on_pushButton_6_clicked();void on_btn_clear_clicked();private:Ui::Dialog *ui;
};#endif // DIALOG_H

第四步: 复制如下代码到dialog.cpp中


```cpp
#include "dialog.h"
#include "ui_dialog.h"Dialog::Dialog(QWidget *parent) :QDialog(parent),ui(new Ui::Dialog)
{ui->setupUi(this);setFixedSize(800,800);connect(ui->btn_open1,SLOT(click()),this,SLOT(on_btn_open1_clicked()));connect(ui->btn_openmany,SLOT(click()),this,SLOT(on_btn_openmany_clicked()));connect(ui->btn_chooselist,SLOT(click()),this,SLOT(on_btn_chooselist_clicked()));connect(ui->btn_save,SLOT(click()),this,SLOT(on_btn_save_clicked()));connect(ui->btn_color,SLOT(click()),this,SLOT(on_btn_color_clicked()));connect(ui->btn_font,SLOT(click()),this,SLOT(on_btn_font_clicked()));connect(ui->btn_char,SLOT(click()),this,SLOT(on_btn_char_clicked()));connect(ui->btn_int,SLOT(click()),this,SLOT(on_btn_int_clicked()));connect(ui->btn_select,SLOT(click()),this,SLOT(on_btn_select_clicked()));connect(ui->pushButton_6,SLOT(click()),this,SLOT(on_pushButton_6_clicked()));connect(ui->btn_clear,SLOT(click()),this,SLOT(on_btn_clear_clicked()));
}Dialog::~Dialog()
{delete ui;
}void Dialog::on_btn_open1_clicked()
{QString curpath=QDir::currentPath();QString title="选择一个文件";QString filter="文本文件(*.txt);;图片文件(*.jpg *.gif);;所有文件(*.*)";QString filename=QFileDialog::getOpenFileName(this,title,curpath,filter);if(!filename.isEmpty()){ui->plainTextEdit->appendPlainText(filename);}
}void Dialog::on_btn_openmany_clicked()
{QString curpath=QDir::currentPath();QString title="选择多个文件";QString filter="文本文件(*.txt);;图片文件(*.jpg *.gif);;所有文件(*.*)";QStringList filelist=QFileDialog::getOpenFileNames(this,title,curpath,filter);if(!filelist.isEmpty()){for(int i=0;i<filelist.count();i++){ui->plainTextEdit->appendPlainText(filelist.at(i));}}
}void Dialog::on_btn_chooselist_clicked()
{QString curpath=QCoreApplication::applicationDirPath();QString title="选择一个目录";QString selectdir=QFileDialog::getExistingDirectory(this,title,curpath,QFileDialog::ShowDirsOnly);if(!selectdir.isEmpty()){ui->plainTextEdit->appendPlainText(selectdir);}}void Dialog::on_btn_save_clicked()
{QString curpath=QCoreApplication::applicationDirPath();QString title="保存文件";QString filter="h文件(*.h);;C++文件(.cpp);;所有文件(*.*)";QString filename=QFileDialog::getSaveFileName(this,title,curpath,filter);if(!filename.isEmpty()){ui->plainTextEdit->appendPlainText(filename);}}void Dialog::on_btn_color_clicked()
{QPalette pal=ui->plainTextEdit->palette();QColor inicolor=pal.color(QPalette::Text);QColor color=QColorDialog::getColor(inicolor,this,"选择颜色");if(color.isValid()){pal.setColor(QPalette::Text,color);ui->plainTextEdit->setPalette(pal);}
}void Dialog::on_btn_font_clicked()
{QFont inifont=ui->plainTextEdit->font();bool ok=false;QFont font=QFontDialog::getFont(&ok,inifont);if(ok){ui->plainTextEdit->setFont(font);}}void Dialog::on_btn_char_clicked()
{QString title="输入文字对话框";QString label="请输入文件名";QString txt="新建文件.txt";QLineEdit::EchoMode echomode=QLineEdit::Normal;bool ok=false;QString text=QInputDialog::getText(this,title,label,echomode,txt,&ok);if(ok&&!text.isEmpty()){ui->plainTextEdit->appendPlainText(text);}}void Dialog::on_btn_int_clicked()
{QString title="输入文字对话框";QString label="输入字体大小";int defaultvalue=ui->plainTextEdit->font().pointSize();int minvalue=6,maxvalue=50,stepvalue=1;bool ok=false;int inputvalue=QInputDialog::getInt(this,title,label,defaultvalue,minvalue,maxvalue,stepvalue,&ok);if(ok){QFont font=ui->plainTextEdit->font();font.setPointSize(inputvalue);ui->plainTextEdit->setFont(font);}
}void Dialog::on_btn_float_clicked()
{}void Dialog::on_btn_select_clicked()
{QStringList items;items<<"优秀"<<"良好"<<"合格"<<"不合格";QString title="条目选择对话框";QString label="请选择级别";int index=0;bool editable=true;bool ok=false;QString text=QInputDialog::getItem(this,title,label,items,index,editable,&ok);if(ok&&!text.isEmpty()){ui->plainTextEdit->appendPlainText(text);}
}void Dialog::on_pushButton_6_clicked()
{QString title="infor消息框";QString info="文件已经打开";QMessageBox::warning(this,title,info);}void Dialog::on_btn_clear_clicked()
{ui->plainTextEdit->clear();}