QT 数据库编程二

//logindlg.cpp
#include "logindlg.h"

#include <QGridLayout>
#include <QHBoxLayout>
#include <QPalette>

loginDlg::loginDlg(QWidget *parent) :
QDialog(parent)
{
/*默认没有点击登录*/
islogin=false;

this->setWindowTitle(tr("登录"));

label1=new QLabel(tr("用户ID:"));
edit1=new QLineEdit();

label2=new QLabel(tr("密码:"));
edit2=new QLineEdit();
/*将QLineEdit设置成密码框*/
edit2->setEchoMode(QLineEdit::Password);

label3=new QLabel(tr("数据库名称:"));
edit3=new QLineEdit();

label4=new QLabel(tr("服务器IP:"));
edit4=new QLineEdit();

btn1=new QPushButton(tr("登录"));
connect(btn1,SIGNAL(clicked()),this,SLOT(btn1_click()));
btn2=new QPushButton(tr("取消"));
connect(btn2,SIGNAL(clicked()),this,SLOT(btn2_click()));

QHBoxLayout *lay2=new QHBoxLayout();
lay2->addWidget(btn1);
lay2->addWidget(btn2);

QGridLayout *lay1=new QGridLayout(this);
lay1->addWidget(label1,0,0);
lay1->addWidget(edit1,0,1);
lay1->addWidget(label2,1,0);
lay1->addWidget(edit2,1,1);
lay1->addWidget(label3,2,0);
lay1->addWidget(edit3,2,1);
lay1->addWidget(label4,3,0);
lay1->addWidget(edit4,3,1);
lay1->addLayout(lay2,4,0,1,2);

/*设置第0列占位比为1*/
lay1->setColumnStretch(0,1);
/*设置第1列占位比为1*/
lay1->setColumnStretch(1,1);
/*设置边距*/
lay1->setMargin(15);
/*设置控件间的间距*/
lay1->setSpacing(10);
/*设置窗口大小不可以随意改变*/
lay1->setSizeConstraint(QLayout::SetFixedSize);
/*设置图片填充满对话框背景*/
this->setAutoFillBackground(true);
/*设置对话框背景图片*/
QPalette palette1;
palette1.setBrush(QPalette::Background,QBrush(QPixmap("12.jpg")));
this->setPalette(palette1);
}

void loginDlg::btn1_click()
{
/*用户点击登录*/
islogin=true;
//获取用户输入信息
username=edit1->text();
userpass=edit2->text();
dbname=edit3->text();
ipaddr=edit4->text();
/*在登录方法只获取信息，在主函数中处理这些信息，这是为了安全*/
this->close();
/*不关闭对话框,Dialog的exec()方法会永远阻塞*/
}

void loginDlg::btn2_click()
{
/*用户点击取消*/
islogin=false;
this->close();
}

//main.cpp
#include "mainwindow.h"
#include <QApplication>

int main(int argc, char *argv[])
{
QApplication a(argc, argv);
MainWindow w;
w.resize(700,500);
w.show();

return a.exec();
}

//scriptdlg.cpp
#include "scriptdlg.h"

#include <QHBoxLayout>
#include <QVBoxLayout>

ScriptDlg::ScriptDlg(QWidget *parent) :
QDialog(parent)
{
isexec=false;

this->setWindowTitle("执行SQL");
label1=new QLabel(tr("请输入SQL"));
tedit1=new QTextEdit();
btn1=new QPushButton(tr("执行"));
connect(btn1,SIGNAL(clicked()),this,SLOT(btn1_click()));
btn2=new QPushButton(tr("取消"));
connect(btn2,SIGNAL(clicked()),this,SLOT(btn2_click()));
QHBoxLayout *lay1=new QHBoxLayout();
lay1->addWidget(btn1);
lay1->addWidget(btn2);
QVBoxLayout *lay2=new QVBoxLayout();
lay2->addWidget(tedit1);
lay2->addLayout(lay1);
QHBoxLayout *lay3=new QHBoxLayout(this);
lay3->addWidget(label1);
lay3->addLayout(lay2);

/*设置边距*/
lay3->setMargin(15);
/*设置间距*/
lay3->setSpacing(10);
}

void ScriptDlg::btn1_click()
{
isexec=true;
//获取用户输入
this->strsql=tedit1->toPlainText();
this->close();
}

void ScriptDlg::btn2_click()
{
this->close();
}