【书籍】《Qt5开发及实例》笔记

   

 第一章 概述

   

1.3.1 设计器实现

   

   

 1.3.2代码实现

   

   

   

 L1.2概念解析

 伙伴编辑模式

 信号与槽机制

   

 

 元对象系统

 布局管理器

   

第二章

 2.1字符串

  字符串相加 替换 格式处理 去除空白符号等

 查询字符串数据

字符串转换

   

 2.2容器类list map hash 不同容器操作速度不一样

不同的容器，读写速度不一样

 

QList<int> list;

list<<1<<2<<3<<4<<5;

QListIterator<int> i(list);

for(;i.hasNext();)

qDebug()<<i.next();

 Qmap

 

   

2.3 Qvariant【可存储多种类型】

 

 2.4算法和正则表达式【】

 

2.5 控件

项目视图【】

定时器【】

项目控件【】

   

隐式共享和 引用计数

 

 第三章 布局管理

3.1分割窗口

#include "mainwindow.h"

#include <QApplication>

#include<Qsplitter>

#include<QTextEdit>

#include <QTextCodec>

 

int main(int argc, char *argv[])

{

QApplication a(argc, argv);

QFont font("ZYSong18030",12);

a.setFont(font);

//主分割窗口

QSplitter *splitterMain =new QSplitter(Qt::Horizontal,0);

QTextEdit *textLeft =new QTextEdit(QObject::tr("Left Widget"),splitterMain);

textLeft->setAlignment(Qt::AlignCenter);

//右部分割窗口

QSplitter *splitterRight =new QSplitter(Qt::Vertical,splitterMain);

splitterRight->setOpaqueResize(false);

QTextEdit *textUp =new QTextEdit(QObject::tr("Top Widget"),splitterRight);

textUp->setAlignment(Qt::AlignCenter);

QTextEdit *textBottom =new QTextEdit(QObject::tr("Bottom Widget"),splitterRight);

textBottom->setAlignment(Qt::AlignCenter);

splitterMain->setStretchFactor(1,1);

splitterMain->setWindowTitle(QObject::tr("Splitter"));

splitterMain->show();

 

//MainWindow w;

//w.show();

 

return a.exec();

}

 

3.2停靠窗口【】

#include "dockwindows.h"

#include<QTextEdit>

#include<QDockWidget>

 

DockWindows::DockWindows(QWidget *parent)

: QMainWindow(parent)

{

setWindowTitle(tr("DockWindows"));    //设置主窗口的标题栏文字

QTextEdit *te=new QTextEdit(this);    //定义一个QTextEdit对象作为主窗口

te->setText(tr("Main Window"));

te->setAlignment(Qt::AlignCenter);

setCentralWidget(te); //将此编辑框设为主窗口的中央窗体

//停靠窗口1

QDockWidget *dock=new QDockWidget(tr("DockWindow1"),this);

dock->setFeatures(QDockWidget::DockWidgetMovable); //可移动

dock->setAllowedAreas(Qt::LeftDockWidgetArea|Qt::RightDockWidgetArea);

QTextEdit *te1 =new QTextEdit();

te1->setText(tr("Window1,The dock widget can be moved between docks by the user" ""));

dock->setWidget(te1);

addDockWidget(Qt::RightDockWidgetArea,dock);

//停靠窗口2

dock=new QDockWidget(tr("DockWindow2"),this);

dock->setFeatures(QDockWidget::DockWidgetClosable|QDockWidget::DockWidgetFloatable); //可关闭、可浮动

QTextEdit *te2 =new QTextEdit();

te2->setText(tr("Window2,The dock widget can be detached from the main window,""and floated as an independent window, and can be closed"));

dock->setWidget(te2);

addDockWidget(Qt::RightDockWidgetArea,dock);

//停靠窗口3

dock=new QDockWidget(tr("DockWindow3"),this);

dock->setFeatures(QDockWidget::AllDockWidgetFeatures); //全部特性

QTextEdit *te3 =new QTextEdit();

te3->setText(tr("Window3,The dock widget can be closed, moved, and floated"));

dock->setWidget(te3);

addDockWidget(Qt::RightDockWidgetArea,dock);

}

 

DockWindows::~DockWindows()

{

 

}

 

 

3.3堆栈窗口

#include "stackdlg.h"

#include <QHBoxLayout>

StackDlg::StackDlg(QWidget *parent)

: QDialog(parent)

{

setWindowTitle(tr("StackedWidget"));

list =new QListWidget(this);

list->insertItem(0,tr("Window1"));

list->insertItem(1,tr("Window2"));

list->insertItem(2,tr("Window3"));

 

label1 =new QLabel(tr("WindowTest1"));

label2 =new QLabel(tr("WindowTest2"));

label3 =new QLabel(tr("WindowTest3"));

 

stack =new QStackedWidget(this);

stack->addWidget(label1);

stack->addWidget(label2);

stack->addWidget(label3);

QHBoxLayout *mainLayout =new QHBoxLayout(this);

mainLayout->setMargin(5);

mainLayout->setSpacing(5);

mainLayout->addWidget(list);

mainLayout->addWidget(stack,0,Qt::AlignHCenter);

mainLayout->setStretchFactor(list,1);

mainLayout->setStretchFactor(stack,3);

connect(list,SIGNAL(currentRowChanged(int)),stack,SLOT(setCurrentIndex(int)));

}

 

StackDlg::~StackDlg()

{

 

}

 

3.4基本布局~

 

#include "dialog.h"

#include<QLabel>

#include<QLineEdit>

#include<QComboBox>

#include<QPushButton>

#include<QFrame>

#include<QGridLayout>

#include<QPixmap>

#include<QHBoxLayout>

 

Dialog::Dialog(QWidget *parent)

: QDialog(parent)

{

setWindowTitle(tr("UserInfo"));

/************** 左侧 ******************************/

UserNameLabel =new QLabel(tr("用户名："));

UserNameLineEdit =new QLineEdit;

NameLabel =new QLabel(tr("姓名："));

NameLineEdit =new QLineEdit;

SexLabel =new QLabel(tr("性别："));

SexComboBox =new QComboBox;

SexComboBox->addItem(tr("女"));

SexComboBox->addItem(tr("男"));

DepartmentLabel =new QLabel(tr("部门："));

DepartmentTextEdit =new QTextEdit;

AgeLabel =new QLabel(tr("年龄："));

AgeLineEdit =new QLineEdit;

OtherLabel =new QLabel(tr("备注："));

OtherLabel->setFrameStyle(QFrame::Panel|QFrame::Sunken);

 

LeftLayout =new QGridLayout();

LeftLayout->addWidget(UserNameLabel,0,0);             //用户名

LeftLayout->addWidget(UserNameLineEdit,0,1);

 

LeftLayout->addWidget(NameLabel,1,0);     //姓名

LeftLayout->addWidget(NameLineEdit,1,1);

 

LeftLayout->addWidget(SexLabel,2,0);     //性别

LeftLayout->addWidget(SexComboBox,2,1);

 

LeftLayout->addWidget(DepartmentLabel,3,0);     //部门

LeftLayout->addWidget(DepartmentTextEdit,3,1);

 

LeftLayout->addWidget(AgeLabel,4,0); //年龄

LeftLayout->addWidget(AgeLineEdit,4,1);

 

LeftLayout->addWidget(OtherLabel,5,0,1,2);     //其他

 

LeftLayout->setColumnStretch(0,1);

LeftLayout->setColumnStretch(1,3);

/*********右侧*********/

HeadLabel =new QLabel(tr("头像： ")); //右上角部分

HeadIconLabel =new QLabel;

QPixmap icon("312.png");

HeadIconLabel->setPixmap(icon);

HeadIconLabel->resize(icon.width(),icon.height());

UpdateHeadBtn =new QPushButton(tr("更新"));

 

TopRightLayout =new QHBoxLayout();

TopRightLayout->setSpacing(20);

TopRightLayout->addWidget(HeadLabel);

TopRightLayout->addWidget(HeadIconLabel);

TopRightLayout->addWidget(UpdateHeadBtn);

IntroductionLabel =new QLabel(tr("个人说明：")); //右下角部分

IntroductionTextEdit =new QTextEdit;

 

RightLayout =new QVBoxLayout();

RightLayout->setMargin(10);

RightLayout->addLayout(TopRightLayout);

RightLayout->addWidget(IntroductionLabel);

RightLayout->addWidget(IntroductionTextEdit);

/*--------------------- 底部 --------------------*/

OkBtn =new QPushButton(tr("确定"));

CancelBtn =new QPushButton(tr("取消"));

 

ButtomLayout =new QHBoxLayout();

ButtomLayout->addStretch();

ButtomLayout->addWidget(OkBtn);

ButtomLayout->addWidget(CancelBtn);

/*---------------------------------------------*/

QGridLayout *mainLayout =new QGridLayout(this);

mainLayout->setMargin(15);

mainLayout->setSpacing(10);

mainLayout->addLayout(LeftLayout,0,0);

mainLayout->addLayout(RightLayout,0,1);

mainLayout->addLayout(ButtomLayout,1,0,1,2);

mainLayout->setSizeConstraint(QLayout::SetFixedSize);

}

 

Dialog::~Dialog()

{

 

}

 

    

第四章 基本对话框--【各种基本对话框】

 

 

 

 

4.7 工具盒类

4.8 进度条

4.9调色板和电子钟

 

4.10可扩展对话框

4.11不规则对话框

4.12程序启动画面 qsplashscreen

 

第五章 主窗体

5.1.3菜单和工具栏的实现

打印文本 图片

 

文本编辑

 

文本颜色 字体 字号 下划线 粗体 倾斜

段落对齐 文本排序 列表序号

第六章 图形与图片

 

窗体位置

 

基本图形的绘制

 

 

void PaintArea::paintEvent(QPaintEvent *)

{

QPainter p(this);

p.setPen(pen);

p.setBrush(brush);

 

QRect rect(50,100,300,200);

 

static const QPoint points[4]=

{

QPoint(150,100),

QPoint(300,150),

QPoint(350,250),

QPoint(100,300)

};

int startAngle =30*16;

int spanAngle =120*16;

 

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);

path.setFillRule(fillRule);

 

switch(shape)

{

case Line:     //直线

p.drawLine(rect.topLeft(),rect.bottomRight());     break;

case Rectangle:     //长方形

p.drawRect(rect);    break;

case RoundRect:     //圆角方形

p.drawRoundRect(rect);     break;

case Ellipse:     //椭圆形

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

p.drawArc(rect,startAngle,spanAngle);     break;

case Path:     //路径

p.drawPath(path);     break;

case Text:     //文字

p.drawText(rect,Qt::AlignCenter,tr("Hello Qt!"));    break;

case Pixmap:     //图片

p.drawPixmap(150,150,QPixmap("butterfly.png"));     break;

default:     break;

}

}

 

双缓冲机制    

void DrawWidget::mousePressEvent(QMouseEvent *e)

{

startPos = e->pos();

}

 

void DrawWidget::mouseMoveEvent(QMouseEvent *e)

{

QPainter *painter = new QPainter;

 

QPen pen;

pen.setStyle((Qt::PenStyle)style);

pen.setWidth(weight);

pen.setColor(color);

 

painter->begin(pix);

painter->setPen(pen);

painter->drawLine(startPos,e->pos());

painter->end();

startPos =e->pos();

update();

}

 

void DrawWidget::paintEvent(QPaintEvent *)

{

QPainter painter(this);

painter.drawPixmap(QPoint(0,0),*pix);

}

 

void DrawWidget::resizeEvent(QResizeEvent *event)

{

if(height()>pix->height()||width()>pix->width())

{

QPixmap *newPix = new QPixmap(size());

newPix->fill(Qt::white);

QPainter p(newPix);

p.drawPixmap(QPoint(0,0),*pix);

pix = newPix;

}

QWidget::resizeEvent(event);

}

 

void DrawWidget::clear()

{

QPixmap *clearPix =new QPixmap(size());

clearPix->fill(Qt::white);

pix = clearPix;

update();

}

第七章 图形视图框架

 

 

 

第八章 模型视图结构

 

 

 

 

第九章 文件和磁盘处理

 

 

第十章 网络和通信

 

 

 

 

 

第十一章 事件处理

 

按键事件

事件过滤

 

 

第十二章 多线程

多线程控制 互斥量 信号量 线程等待

 

第十三章 数据库

 

 

 

第十四章 国际化

tr 函数 翻译

第十五章 单元测试框架

 

第十六章 综合实例：汽车销售管理

 

 

 

第十七章 综合实例：聊天软件

使用toolbox罗列用户，使用toolbutton显示用户头像和名称

 

第八章

 

第八章