Come world to Record life

#-------------------------------------------------
#
# Project created by QtCreator 2015-11-02T18:38:46
#
#-------------------------------------------------

QT       += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = Painter
TEMPLATE = app

SOURCES += main.cpp 
    painter.cpp 
    widget.cpp

HEADERS  += 
    painter.h 
    widget.h

#ifndef WIDGET_H
#define WIDGET_H

#include <QWidget>
#include <QBrush>
#include<QPen>
#include<QPainter>
#include<QRect>
#include<QPoint>
#include<QDebug>
class Painter : public QWidget
{
    Q_OBJECT

public:
    Painter(QWidget *parent = 0);
    ~Painter();
public:
    //枚举所有类型的图形
    enum Shape{Line,Rectangle,RoundRect,Ellipse,Polygon,Polyline,Points,Arc,Path,Text,Pixmap};
    void setShape(Shape);
    void setPen(QPen);
    void setBrush(QBrush);
    //重写重绘事件
    void paintEvent(QPaintEvent*);
private :
    Shape shape;
    QBrush brush;
    QPen pen;

};

#endif // WIDGET_H

#include "painter.h"

Painter::Painter(QWidget *parent)
    : QWidget(parent)
{
    setPalette(QPalette(Qt::white));//设置背景
    setAutoFillBackground(true);
    setMinimumSize(400,400);
}

Painter::~Painter()
{

}

void Painter::setShape(Shape s){
    shape=s;
    update();//调用qwidget的update()来更新状态
}

void Painter::setPen(QPen p){
    pen=p;
    update();

}

void Painter::setBrush(QBrush b){
    brush=b;
    update();
}

void Painter::paintEvent(QPaintEvent *){
    qDebug()<<"debug 2";

    QPainter p(this);//拿到当前的画笔句柄

    p.setPen(pen);
    p.setBrush(brush);

    //留一个Qrect备用
    QRect rect(50,100,300,200);

    //留一个QPoint 数组备用
    static const QPoint points[4]={
        QPoint(150,100),
        QPoint(300,150),
        QPoint(350,250),
        QPoint(100,300),
    };

    //留几个角度备用
    int startAngle=30*16;
    int spanAngle=120*16;

    //留一个QPainterPath备用
    QPainterPath path;
    path.addRect(150,150,100,100);
    path.moveTo(100,100);
    path.cubicTo(300,100,200,200,300,300);
    path.cubicTo(100,300,200,200,100,100);

    //根据选择的shape分别显示
    switch(shape){
    case Line://直线
        p.drawLine(rect.topLeft(),rect.bottomRight());
        break;
    case Rectangle://矩形
        p.drawRect(rect);
        break;
    case RoundRect://圆角矩形
        p.drawRoundRect(rect);
        break;
    case Ellipse://椭圆
        p.drawEllipse(rect);
        break;
    case Polygon://多边形
        p.drawPolygon(points,4);
        break;
    case Polyline://多边线
        p.drawPolyline(points,4);
        break;
    case Points://点
        p.drawPoints(points,4);
        break;
    case Arc://弧线
        p.drawArc(rect,startAngle,spanAngle);
        break;
    case Path://路径
        p.drawPath(path);
        break;
    case Text://文字
        p.drawText(rect,Qt::AlignCenter,"Hello Qt!");
        break;
//  case Pixmap://图片
//      p.drawPixmap(150,150,QPixmap("homemythstest.png"));
//      break;
    default:
        break;
    }
}

#include "painter.h"
#include <QApplication>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    Widget w;
    w.show();

    return a.exec();
}

#-------------------------------------------------
#
# Project created by QtCreator 2015-10-29T23:52:56
#
#-------------------------------------------------

QT       += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = Dialog
TEMPLATE = app

SOURCES += main.cpp
        dialog.cpp

HEADERS  += dialog.h

#-------------------------------------------------
#
# Project created by QtCreator 2015-10-29T23:52:56
#
#-------------------------------------------------

QT       += core gui
QT       += network  #这里要添加这个库

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = QFtp
TEMPLATE = app

SOURCES += main.cpp
        dialog.cpp

HEADERS  += dialog.h

#ifndef DIALOG_H
#define DIALOG_H

//注意需要添加的头文件
#include<QDialog>
#include<QPushButton>
#include<QFile>
#include<QNetworkReply>
#include<QLineEdit>
#include<QtNetwork/QNetworkAccessManager>
#include<QtNetwork/QNetworkRequest>
#include<QLabel>
#include<QString>
#include<QGridLayout>
#include<QMessageBox>
class Dialog : public QDialog
{
    Q_OBJECT

public:
    Dialog(QWidget *parent = 0);
    ~Dialog();
public:
    QGridLayout *layout;
    QLabel *LbServer,*LbUser,*LbPasswd;
    QLineEdit *LeServer,*LeUser,*LePasswd;
    QPushButton *PbPut,*PbGet;
    QNetworkAccessManager manager;//这个是重点
protected slots:
    //处理按钮的点击信号
    void slotPut();
    void slotGet();
    //处理网络连接的信号
    void managePut(QNetworkReply*);
    void manageGet(QNetworkReply*);
};

#endif // DIALOG_H

#include "dialog.h"

Dialog::Dialog(QWidget *parent)
    : QDialog(parent)
{
    setWindowTitle("My Ftp");

    layout=new QGridLayout(this);
    LbServer=new QLabel("Server:");
    LbUser=new QLabel("User:");
    LbPasswd=new QLabel("Passwd:");
    LeServer=new QLineEdit("ftp://120.27.41.126/home/myths/1.txt");
    LeUser=new QLineEdit("myths");
    LePasswd=new QLineEdit("123456");
    LePasswd->setEchoMode(QLineEdit::Password);//设置加密显示
    PbPut=new QPushButton("Put");
    PbGet=new QPushButton("Get");

    layout->addWidget(LbServer,0,0);
    layout->addWidget(LeServer,0,1);
    layout->addWidget(LbUser,1,0);
    layout->addWidget(LeUser,1,1);
    layout->addWidget(LbPasswd,2,0);
    layout->addWidget(LePasswd,2,1);
    layout->addWidget(PbPut,3,0);
    layout->addWidget(PbGet,3,1);

    setFixedSize(300,200);//固定大小

    //按钮点击事件信号槽的连接
    connect(PbPut,SIGNAL(clicked()),this,SLOT(slotPut()));
    connect(PbGet,SIGNAL(clicked()),this,SLOT(slotGet()));

}

void Dialog::managePut(QNetworkReply * reply){
    qDebug()<<reply->error();//输出调试信息
    switch(reply->error()){//判断连接后的状态
    case QNetworkReply::NoError:
        QMessageBox::information(this,"Put information","Upload Success!");
        break;
    case QNetworkReply::HostNotFoundError:
        QMessageBox::information(this,"Put information","Host Not Found!");
        break;
    case QNetworkReply::AuthenticationRequiredError:
        QMessageBox::information(this,"Put information","Login Failure!");
        break;
    default:
        QMessageBox::information(this,"Put information","Unknown Failure");
        break;
    }
}

void Dialog::manageGet(QNetworkReply *reply){
    //基本和managerPut类似   
    qDebug()<<reply->error();
    QByteArray data;
    switch(reply->error()){
    case QNetworkReply::NoError:
        data=reply->readAll();//从url中读取文件内容，输出到data中（也可以再将数据写入到文件中，为了方便，这里就权且打印一下吧）
        QMessageBox::information(this,"Put information","Upload Success!nThe file you've got is :n"+data);
        break;
    case QNetworkReply::HostNotFoundError:
        QMessageBox::information(this,"Put information","Host Not Found!");
        break;
    case QNetworkReply::AuthenticationRequiredError:
        QMessageBox::information(this,"Put information","Login Failure!");
        break;
    default:
        QMessageBox::information(this,"Put information","Unknown Failure");
        break;
    }
}

Dialog::~Dialog()
{

}

void Dialog::slotPut(){
    //判断信息输入完整
    if(LeUser->text().isEmpty()||LePasswd->text().isEmpty()||LeServer->text().isEmpty()){
        QMessageBox::warning(this,"Error","Please fill in the information");
        return ;
    }

    //重点！将之前的槽清空并重新连接至需要的
    manager.disconnect(SIGNAL(finished(QNetworkReply*)));
    //完全清空某对象连接的槽可以用manager.disconnect();
    connect(&manager,SIGNAL(finished(QNetworkReply*)),SLOT(managePut(QNetworkReply*)));

    //设置登录信息
    QUrl url(LeServer->text());
    url.setPort(21);
    url.setUserName(LeUser->text());
    url.setPassword(LePasswd->text());

    QByteArray data="This is the test data.n";
    /*QNetworkReply *reply=*/
    manager.put(QNetworkRequest(url),data);//将data上传到url中，返回的reply将触发网络的连接信号
}

void Dialog::slotGet(){
    //基本意义与slotPut类似
    if(LeUser->text().isEmpty()||LePasswd->text().isEmpty()||LeServer->text().isEmpty()){
        QMessageBox::warning(this,"Error","Please fill in the information");
        return ;
    }
    manager.disconnect(SIGNAL(finished(QNetworkReply*)));
    connect(&manager,SIGNAL(finished(QNetworkReply*)),SLOT(manageGet(QNetworkReply*)));
    QUrl url(LeServer->text());
    url.setPort(21);
    url.setUserName(LeUser->text());
    url.setPassword(LePasswd->text());
    /*QNetworkReply *reply=*/
    manager.get((QNetworkRequest(url)));
}

#include "dialog.h"
#include <QApplication>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    Dialog w;
    w.show();

    return a.exec();
}

#-------------------------------------------------
#
# Project created by QtCreator 2015-10-24T17:32:35
#
#-------------------------------------------------

QT       += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = Dialog
TEMPLATE = app

SOURCES += main.cpp 
    dialog.cpp

HEADERS  += 
    dialog.h
</pre>
2、dialog.h
<pre class="minimize:true lang:c++ decode:true">#ifndef DIALOG_H
#define DIALOG_H

#include<QDialog>
#include<QVBoxLayout>
#include<QGroupBox>
#include<QToolBox>
#include<QToolButton>
class Drawer : public QToolBox//注意这里是继承自QToolBox。。
{
    Q_OBJECT

public:
    Drawer(QWidget *parent = 0);
    ~Drawer();
public:
    QToolButton *tBtn1[5],*tBtn2[2],*tBtn3[2];//QToolButton类主要用于设置在工具栏中快速访问的按钮，这里姑且用一下。
    QGroupBox *groupBox[3];//这里QGroupBox是用来组织各个按钮的。
    QVBoxLayout *layout;//这里用QVBoxLayout来处理各个QGroupBox
};

#endif // DIALOG_H

#include "dialog.h"

Drawer::Drawer(QWidget *parent)
    : QToolBox(parent)
{
    setWindowTitle("The Drawer");

    groupBox[0]=new QGroupBox;
    groupBox[1]=new QGroupBox;
    groupBox[2]=new QGroupBox;

    layout=new QVBoxLayout(groupBox[0]);//用layout来处理每个groupbox
    layout->setMargin(10);
    layout->setAlignment(Qt::AlignHCenter);//设置对齐模式
    for(int i=0;i<5;i++){
        tBtn1[i]=new QToolButton;
        tBtn1[i]->setText("Button"+QString().setNum(i+1)+"nnnnn");
        layout->addWidget(tBtn1[i]);//在groupbox中加入按钮
    }
    layout->addStretch();//拉伸布局，使部件能够对齐

    layout=new QVBoxLayout(groupBox[1]);
    layout->setMargin(10);
    layout->setAlignment(Qt::AlignHCenter);
    for(int i=0;i<2;i++){
        tBtn2[i]=new QToolButton;
        tBtn2[i]->setText("Button"+QString().setNum(i+1));
        layout->addWidget(tBtn2[i]);
    }
    layout->addStretch();

    layout=new QVBoxLayout(groupBox[2]);
    layout->setMargin(10);
    layout->setAlignment(Qt::AlignHCenter);
    for(int i=0;i<2;i++){
        tBtn3[i]=new QToolButton;
        tBtn3[i]->setText("Button"+QString().setNum(i+1));
        layout->addWidget(tBtn3[i]);
    }
    layout->addStretch();

    this->addItem(groupBox[0],"family");//在当前的QToolBox中添加部件即可
    this->addItem(groupBox[1],"friends");
    this->addItem(groupBox[2],"strangers");
}
Drawer::~Drawer()
{

}

#-------------------------------------------------
#
# Project created by QtCreator 2015-10-24T17:32:35
#
#-------------------------------------------------

QT       += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = Dialog
TEMPLATE = app

SOURCES += main.cpp
        dialog.cpp

HEADERS  += dialog.h

#ifndef DIALOG_H
#define DIALOG_H

#include <QDialog>
#include<QGridLayout>
#include<QPushButton>
#include<QLabel>
#include<QMessageBox>
class Dialog : public QDialog
{
    Q_OBJECT

public:
    Dialog(QWidget *parent = 0);
    ~Dialog();
public://配置部件和布局
    QLabel *label;
    QPushButton *QuestionBtn,*InformationBtn,*WarningBtn,*CriticalBtn,*AboutBtn,*AboutQtBtn,*CustomBtn;
    QGridLayout *layout,*layoutLabel,*layoutBtn;
protected slots://各种按钮的槽
    void slotQuestion();
    void slotInformation();
    void slotWarning();
    void slotCritical();
    void slotAbout();
    void slotAboutQt();
    void slotCustom();
};

#endif // DIALOG_H

#include "dialog.h"

Dialog::Dialog(QWidget *parent)
    : QDialog(parent)
{
    setWindowTitle("QMessageBox");

    QuestionBtn=new QPushButton("Question");
    InformationBtn=new QPushButton("Information");
    WarningBtn=new QPushButton("Warning");
    CriticalBtn=new QPushButton("Critical");
    AboutBtn=new QPushButton("About");
    AboutQtBtn=new QPushButton("AboutQt");
    CustomBtn=new QPushButton("Custom");

    label=new QLabel("About Qt MessageBox:");
    layout=new QGridLayout(this);
    layoutLabel=new QGridLayout;
    layoutBtn=new QGridLayout;
    layoutLabel->addWidget(label,0,0);
    layoutBtn->addWidget(QuestionBtn,1,0);
    layoutBtn->addWidget(InformationBtn,1,1);
    layoutBtn->addWidget(WarningBtn,2,0);
    layoutBtn->addWidget(CriticalBtn,2,1);
    layoutBtn->addWidget(AboutBtn,3,0);
    layoutBtn->addWidget(AboutQtBtn,3,1);
    layoutBtn->addWidget(CustomBtn,4,0);
    layoutBtn->setSpacing(15);

    //嵌套布局
    layout->addLayout(layoutLabel,0,0);
    layout->addLayout(layoutBtn,1,0);
    setFixedSize(300,220);//固定大小

    connect(QuestionBtn,SIGNAL(clicked()),this,SLOT(slotQuestion()));
    connect(InformationBtn,SIGNAL(clicked()),this,SLOT(slotInformation()));
    connect(WarningBtn,SIGNAL(clicked()),this,SLOT(slotWarning()));
    connect(CriticalBtn,SIGNAL(clicked()),this,SLOT(slotCritical()));
    connect(AboutBtn,SIGNAL(clicked()),this,SLOT(slotAbout()));
    connect(AboutQtBtn,SIGNAL(clicked()),this,SLOT(slotAboutQt()));
    connect(CustomBtn,SIGNAL(clicked()),this,SLOT(slotCustom()));
}

Dialog::~Dialog()
{

}

//直接调用AboutQt，设置句柄和标题即可
void Dialog::slotAboutQt(){
 QMessageBox::aboutQt(this,"This is the title");
}

//以下三个函数均是设置句柄标题和信息即可，也可以在最后设置默认按钮，一般默认的是QMessageBox::Ok。
void Dialog::slotAbout(){
     QMessageBox::about(this,"About","This is the label.");
}
void Dialog::slotCritical(){
    QMessageBox::critical(this,"Critical","This is the label.");
}
void Dialog::slotInformation(){
 QMessageBox::information(this,"Information","This is the label.");
}

//自定义消息框
void Dialog::slotCustom(){

    QMessageBox customMsgBox;
    customMsgBox.setWindowTitle("Custom message box");

    //添加按键
    QPushButton *lockBtn=customMsgBox.addButton("Lock",QMessageBox::ActionRole);
    QPushButton *unlockBtn=customMsgBox.addButton("Unlock",QMessageBox::ActionRole);
    QPushButton *cancelBtn=customMsgBox.addButton(QMessageBox::Cancel);//注意cancel不能指定Text

    //customMsgBox.setIconPixmap(QPixmap("a.png"));//设置图片
    customMsgBox.setText("This is the label");
    customMsgBox.exec();//执行消息框

    QPushButton *msg=(QPushButton*)customMsgBox.clickedButton();//接受按键信息

    //判断按键
    if(msg==lockBtn)
        label->setText("Custom button /lock");

    if(msg==unlockBtn)
        label->setText("Custom button /unlock");

    if(msg==cancelBtn)
        label->setText("Custom button /cancel");

}

void Dialog::slotQuestion(){
    //QMessageBox::**question()**函数，传入句柄，标题，文本，按钮值，返回按键对应的值，最后也可以加默认按键的位置
    int msg=QMessageBox::question(this,"Question","This is the label.",QMessageBox::Ok|QMessageBox::Cancel);

    //判断选择信息
    switch(msg){
    case QMessageBox::Ok:
        label->setText("Question button /OK");
        break;
    case QMessageBox::Cancel:
        label->setText("Question button /Cancel");
        break;
    default:
        break;
    }
}

void Dialog::slotWarning(){

    //QmessageBox::warning()函数同Question函数
    int msg=QMessageBox::warning(this,"Question","This is the label.",QMessageBox::Save|QMessageBox::Discard|QMessageBox::Cancel,QMessageBox::Save);

    switch(msg){//判断选择信息
    case QMessageBox::Save:
        label->setText("Warning button /Save");
        break;
    case QMessageBox::Cancel:
        label->setText("Warning button /Cancel");
        break;
    case QMessageBox::Discard:
        label->setText("Warning button /Discard");
        break;
    default:
        break;
    }

}

#include "dialog.h"
#include <QApplication>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    Dialog w;
    w.show();

    return a.exec();
}