【qt】一个WPS项目了解qt界面设计的基本套路

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项目功能演示:

放心食用!最后有完整代码.
超级详细,期待您的一个点赞❥(^_-)

一览全局:

WPS项目目录

一.创建项目二.导入资源三.ui设计四.字号选择框初始化五.滚动条初始化六.添加自定义文本类七.初始化action状态八.新建文档九.打开文件十.保存与另存为十一.打印/打印预览十二.撤销重做剪切复制粘贴十三.关闭事件/退出十四.窗体菜单实现十五.动态添加action/信号映射器十六.字体颜色加粗斜体下划线十七.文本对齐十八.段落符号十九.字体字号二十.打包二十一.发布二十二.完整代码二十三.最后

一.创建项目

用的是QMainWindow类,这个包含菜单,工具栏,状态栏.


能运行出来,就说明环境搭好了.

二.导入资源

三.ui设计

应用图标的添加.

四.字号选择框初始化

获取系统可支持的字号添加到选择框中,再设置当前系统字号

五.滚动条初始化

滚动条就是这个,这是用的后面做完的来演示的.

六.添加自定义文本类

记得添加宏Q_OBJECT,还有初始化父类

七.初始化action状态

八.新建文档

九.打开文件

十.保存与另存为

十一.打印/打印预览

十二.撤销重做剪切复制粘贴

十三.关闭事件/退出

十四.窗体菜单实现

十五.动态添加action/信号映射器

十六.字体颜色加粗斜体下划线

十七.文本对齐

十八.段落符号

void MainWindow::on_comboBoxStandard_activated(int index){    TextEdit*edit=activateWindow();    if(edit)    {        if(index==0)        {            QTextCursor cursor=edit->textCursor();            cursor.beginEditBlock();            QTextList*list=cursor.currentList();            if(list)            {                list->remove(cursor.block());                QTextBlockFormat blockFormat=cursor.blockFormat();                blockFormat.setIndent(0);                cursor.setBlockFormat(blockFormat);            }            cursor.endEditBlock();            return;        }        QTextListFormat::Style style;//描述装饰列表项符号的枚举        switch (index)        {        case 1:            style=QTextListFormat::ListDisc;            break;        case 2:            style=QTextListFormat::ListCircle;            break;        case 3:            style=QTextListFormat::ListSquare;            break;        case 4:            style=QTextListFormat::ListDecimal;            break;        case 5:            style=QTextListFormat::ListLowerAlpha;            break;        case 6:            style=QTextListFormat::ListUpperAlpha;            break;        case 7:            style=QTextListFormat::ListLowerRoman;            break;        case 8:            style=QTextListFormat::ListUpperRoman;            break;        default:            style=QTextListFormat::ListStyleUndefined;//0            break;        }        QTextCursor cursor=edit->textCursor();        cursor.beginEditBlock();        QTextBlockFormat blockFormat=cursor.blockFormat();        QTextListFormat listFormat;        QTextList*list=cursor.currentList();        if(list)        {            listFormat=list->format();            list->remove(cursor.block());            blockFormat.setIndent(0);            cursor.setBlockFormat(blockFormat);        }        listFormat.setStyle(style);        cursor.createList(listFormat);        cursor.endEditBlock();    }}

十九.字体字号

二十.打包

二十一.发布

二十二.完整代码

main.cpp

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

mainwindow.h

#ifndef MAINWINDOW_H#define MAINWINDOW_H#include <QMainWindow>#include "textedit.h"#include <QMdiSubWindow>#include <QPrinter>#include <QActionGroup>#include <QSignalMapper>QT_BEGIN_NAMESPACEnamespace Ui { class MainWindow; }QT_END_NAMESPACEclass MainWindow : public QMainWindow{    Q_OBJECTpublic:    MainWindow(QWidget *parent = nullptr);    ~MainWindow();private slots:    void on_NewAction_triggered();    void setActionStatus(bool b);    void on_OpenAction_triggered();    void on_saveAction_triggered();    void on_saveAsAction_triggered();    void on_printAction_triggered();    void on_printViewAction_triggered();    void printPreview(QPrinter*printer);    void on_undoAction_triggered();    void on_redoAction_triggered();    void on_cutAction_triggered();    void on_copyAction_triggered();    void on_pasteAction_triggered();    void on_exitAction_triggered();    void on_closeAction_triggered();    void on_closeAllAction_triggered();    void on_tileAction_triggered();    void on_cascadeAction_triggered();    void on_nextAction_triggered();    void on_previousAction_triggered();    void addSubWindowAction();    void setActiveSubWindow(QWidget*widget);    void on_colorAction_triggered();    void on_blodAction_triggered();    void on_italicAction_triggered();    void on_underLineAction_triggered();    void on_leftAlignAction_triggered();    void on_centerAction_triggered();    void on_rightAlignAction_triggered();    void on_justifyAction_triggered();    void on_comboBoxStandard_activated(int index);    void on_fontComboBox_activated(const QString &arg1);    void on_comboBoxFontSize_activated(const QString &arg1);protected:    void closeEvent(QCloseEvent *event)override;//重写关闭事件private:    Ui::MainWindow *ui;    void init();//初始化函数    void initFontSize();//初始化字号    void initScrollBar();//初始化滚动条    void initWindowAction();//初始化窗体相关的action    void initDocAction();//初始化文本相关的action    TextEdit* activateWindow();//获取当前活动窗口    QMdiSubWindow * findSubWindow(const QString&docName);//获取相应文档的子窗体    QActionGroup*actionGroup;    QSignalMapper*mapper;};#endif // MAINWINDOW_H

mainwindow.cpp

#include "mainwindow.h"#include "ui_mainwindow.h"#include <QFontDatabase>#include <QMdiSubWindow>#include <QFileDialog>#include <QFileInfo>#include <QPrinter>#include <QPrintDialog>#include <QPrintPreviewDialog>#include <QCloseEvent>#include <QColorDialog>#include <QTextCharFormat>#include <QTextList>MainWindow::MainWindow(QWidget *parent)    : QMainWindow(parent)    , ui(new Ui::MainWindow){    ui->setupUi(this);     init();}MainWindow::~MainWindow(){    delete ui;}void MainWindow::init(){    ui->mdiArea->setBackground(QBrush(Qt::white));//用画刷设置mdi背景颜色    initFontSize();    initScrollBar();    initWindowAction();    //当窗口关闭时发送一次信号,重新设置窗口action. initWindowAction    connect(ui->mdiArea,&QMdiArea::subWindowActivated,this,&MainWindow::initWindowAction);    connect(ui->mdiArea,&QMdiArea::subWindowActivated,this,&MainWindow::initDocAction);    initDocAction();    actionGroup=new QActionGroup(this);    actionGroup->setExclusive(true);//排他选择    mapper=new QSignalMapper(this);    connect(ui->menu_W,&QMenu::aboutToShow,this,&MainWindow::addSubWindowAction);    connect(mapper,SIGNAL(mapped(QWidget*)),this,SLOT(setActiveSubWindow(QWidget*)));}void MainWindow::initFontSize(){    ui->comboBoxFontSize->clear();    //QFontDatabase提供系统可用字体的相关信息    for(int fontSize:QFontDatabase::standardSizes())//返回标准字体大小的列表    {        ui->comboBoxFontSize->addItem(QString::number(fontSize));//插入到字体选择框中    }    QFont appFont=QApplication::font();//当前系统默认字体    int fontSize=appFont.pointSize(); //获取字体号    int sizeIndex=ui->comboBoxFontSize->findText(QString::number(fontSize));    ui->comboBoxFontSize->setCurrentIndex(sizeIndex);}void MainWindow::initScrollBar(){    //设置mdi的水平和垂直滚动条当需要的时候    ui->mdiArea->setHorizontalScrollBarPolicy(Qt::ScrollBarAsNeeded);    ui->mdiArea->setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);}void MainWindow::initWindowAction(){    bool hasActWindow=(activateWindow()!=nullptr);    ui->saveAction->setEnabled(hasActWindow);    ui->saveAsAction->setEnabled(hasActWindow);    ui->printAction->setEnabled(hasActWindow);    ui->printViewAction->setEnabled(hasActWindow);    ui->undoAction->setEnabled(hasActWindow);    ui->redoAction->setEnabled(hasActWindow);    ui->pasteAction->setEnabled(hasActWindow);    ui->closeAction->setEnabled(hasActWindow);    ui->closeAllAction->setEnabled(hasActWindow);    ui->tileAction->setEnabled(hasActWindow);    ui->cascadeAction->setEnabled(hasActWindow);    ui->nextAction->setEnabled(hasActWindow);    ui->previousAction->setEnabled(hasActWindow);}void MainWindow::initDocAction(){    ui->cutAction->setEnabled(false);    ui->copyAction->setEnabled(false);    ui->colorAction->setEnabled(false);    ui->blodAction->setEnabled(false);    ui->italicAction->setEnabled(false);    ui->underLineAction->setEnabled(false);    ui->leftAlignAction->setEnabled(false);    ui->centerAction->setEnabled(false);    ui->rightAlignAction->setEnabled(false);    ui->justifyAction->setEnabled(false);}TextEdit *MainWindow::activateWindow(){    QMdiSubWindow*window=ui->mdiArea->activeSubWindow();    if(window)    {        return qobject_cast<TextEdit*>(window->widget());    }    return nullptr;}QMdiSubWindow *MainWindow::findSubWindow(const QString &docName){    QString filepath=QFileInfo(docName).canonicalFilePath();//返回文件的绝对路径    for(QMdiSubWindow*sub:ui->mdiArea->subWindowList())    {        TextEdit* edit=qobject_cast<TextEdit*>(sub->widget());        if(edit->getDocFilePath()==filepath)        {            return sub;        }    }    return nullptr;}void MainWindow::on_NewAction_triggered(){    TextEdit*edit=new TextEdit;    ui->mdiArea->addSubWindow(edit);//edit父对象将是QMdiArea的viewport小部件    //当文本编辑器选中或者取消选中会发出copyAvailable信号.    connect(edit,&TextEdit::copyAvailable,this,&MainWindow::setActionStatus);    edit->initNewDoc();    edit->show();}void MainWindow::setActionStatus(bool b){    ui->cutAction->setEnabled(b);    ui->copyAction->setEnabled(b);    ui->colorAction->setEnabled(b);    ui->blodAction->setEnabled(b);    ui->italicAction->setEnabled(b);    ui->underLineAction->setEnabled(b);    ui->leftAlignAction->setEnabled(b);    ui->centerAction->setEnabled(b);    ui->rightAlignAction->setEnabled(b);    ui->justifyAction->setEnabled(b);}void MainWindow::on_OpenAction_triggered(){    QString docName=QFileDialog::getOpenFileName(this,"打开文档","./","所以文件(*.*)");    if(!docName.isEmpty())    {        QMdiSubWindow*sub=findSubWindow(docName);        if(sub)        {            ui->mdiArea->setActiveSubWindow(sub);            return;        }        TextEdit*edit=new TextEdit;        ui->mdiArea->addSubWindow(edit);        connect(edit,&TextEdit::copyAvailable,this,&MainWindow::setActionStatus);        if(edit->loadDoc(docName))        {            statusBar()->showMessage("文档已打开",3000);//3秒显示在状态栏            edit->show();        }        else        {            edit->close();        }    }}void MainWindow::on_saveAction_triggered(){    TextEdit* edit=activateWindow();    if(edit)    {        if(edit->saveDoc())        {            statusBar()->showMessage("文档已保存",3000);        }    }}void MainWindow::on_saveAsAction_triggered(){    TextEdit* edit=activateWindow();    if(edit)    {        if(edit->saveAsDoc())        {            statusBar()->showMessage("文档已保存",3000);        }    }}void MainWindow::on_printAction_triggered(){    TextEdit* edit=activateWindow();    if(!edit) return;    //QPrinter::HighResolution将printer分辨率设置为正在使用的打印机分辨率    QPrinter printer(QPrinter::HighResolution);    QPrintDialog dialog(&printer,this);    if(dialog.exec()==QDialog::Accepted)    {        edit->print(&printer);    }}void MainWindow::on_printViewAction_triggered(){    TextEdit* edit=activateWindow();    if(!edit) return;    QPrinter printer;    QPrintPreviewDialog preview(&printer,this);    connect(&preview,&QPrintPreviewDialog::paintRequested,this,&MainWindow::printPreview);    if(preview.exec()==QPrintPreviewDialog::Accepted)    {        edit->print(&printer);    }}void MainWindow::printPreview(QPrinter*printer){    TextEdit* edit=activateWindow();    if(edit)    {        edit->print(printer);    }}void MainWindow::on_undoAction_triggered(){    TextEdit*edit=activateWindow();    if(edit)    {        edit->undo();    }}void MainWindow::on_redoAction_triggered(){    TextEdit*edit=activateWindow();    if(edit)    {        edit->redo();    }}void MainWindow::on_cutAction_triggered(){    TextEdit*edit=activateWindow();    if(edit)    {        edit->cut();    }}void MainWindow::on_copyAction_triggered(){    TextEdit*edit=activateWindow();    if(edit)    {        edit->copy();    }}void MainWindow::on_pasteAction_triggered(){    TextEdit*edit=activateWindow();    if(edit)    {        edit->paste();    }}void MainWindow::closeEvent(QCloseEvent *event){    ui->mdiArea->closeAllSubWindows();    if(ui->mdiArea->currentSubWindow())    {        event->ignore();    }    else    {        event->accept();    }}void MainWindow::on_exitAction_triggered(){    close();}void MainWindow::on_closeAction_triggered(){    ui->mdiArea->closeActiveSubWindow();}void MainWindow::on_closeAllAction_triggered(){    ui->mdiArea->closeAllSubWindows();}void MainWindow::on_tileAction_triggered(){    ui->mdiArea->tileSubWindows();}void MainWindow::on_cascadeAction_triggered(){    ui->mdiArea->cascadeSubWindows();}void MainWindow::on_nextAction_triggered(){    ui->mdiArea->activateNextSubWindow();}void MainWindow::on_previousAction_triggered(){    ui->mdiArea->activatePreviousSubWindow();}void MainWindow::addSubWindowAction(){    QList<QAction*> actionList=actionGroup->actions();    if(!actionList.isEmpty())    {        for(QAction*action:actionList)        {            delete action;        }    }    QList<QMdiSubWindow*>subWindowList=ui->mdiArea->subWindowList();//获取子窗体列表    if(!subWindowList.isEmpty())ui->menu_W->addSeparator();//添加一个分隔符    for(int i=0;i<subWindowList.count();i++)    {        QMdiSubWindow*subWindow=subWindowList[i];        TextEdit*edit=qobject_cast<TextEdit*>(subWindow->widget());        QString action_text=QString("%1 %2").arg(i+1).arg(edit->getDocWindowTitle());        QAction* action=ui->menu_W->addAction(action_text);        actionGroup->addAction(action);        action->setCheckable(true);        if(edit==activateWindow())action->setChecked(true);//设置选中        connect(action,SIGNAL(triggered(bool)),mapper,SLOT(map()));        mapper->setMapping(action,subWindow);    }}void MainWindow::setActiveSubWindow(QWidget *widget){    if(widget)ui->mdiArea->setActiveSubWindow(qobject_cast<QMdiSubWindow*>(widget));}void MainWindow::on_colorAction_triggered(){    TextEdit*edit=activateWindow();    if(edit)    {        QColor color;        color=QColorDialog::getColor();        if(!color.isValid())return ;        QTextCharFormat format;        format.setForeground(color);        edit->mergeCurrentCharFormat(format);        QPixmap pixmap(24,24);        pixmap.fill(color);        ui->colorAction->setIcon(pixmap);    }}void MainWindow::on_blodAction_triggered(){    TextEdit*edit=activateWindow();    if(edit)    {        bool ischecked=ui->blodAction->isChecked();        QTextCharFormat format;        format.setFontWeight(ischecked?QFont::Bold:QFont::Normal);        edit->mergeCurrentCharFormat(format);    }}void MainWindow::on_italicAction_triggered(){    TextEdit*edit=activateWindow();    if(edit)    {        QTextCharFormat format;        format.setFontItalic(ui->italicAction->isChecked());        edit->mergeCurrentCharFormat(format);    }}void MainWindow::on_underLineAction_triggered(){    TextEdit*edit=activateWindow();    if(edit)    {        QTextCharFormat format;        format.setFontUnderline(ui->underLineAction->isChecked());        edit->mergeCurrentCharFormat(format);    }}void MainWindow::on_leftAlignAction_triggered(){    TextEdit*edit=activateWindow();    if(edit)    {        edit->setAlignment(Qt::AlignLeft);    }}void MainWindow::on_centerAction_triggered(){    TextEdit*edit=activateWindow();    if(edit)    {        edit->setAlignment(Qt::AlignCenter);    }}void MainWindow::on_rightAlignAction_triggered(){    TextEdit*edit=activateWindow();    if(edit)    {        edit->setAlignment(Qt::AlignRight);    }}void MainWindow::on_justifyAction_triggered(){    TextEdit*edit=activateWindow();    if(edit)    {        edit->setAlignment(Qt::AlignJustify);    }}void MainWindow::on_comboBoxStandard_activated(int index){    TextEdit*edit=activateWindow();    if(edit)    {        if(index==0)        {            QTextCursor cursor=edit->textCursor();            cursor.beginEditBlock();            QTextList*list=cursor.currentList();            if(list)            {                list->remove(cursor.block());                QTextBlockFormat blockFormat=cursor.blockFormat();                blockFormat.setIndent(0);                cursor.setBlockFormat(blockFormat);            }            cursor.endEditBlock();            return;        }        QTextListFormat::Style style;//描述装饰列表项符号的枚举        switch (index)        {        case 1:            style=QTextListFormat::ListDisc;            break;        case 2:            style=QTextListFormat::ListCircle;            break;        case 3:            style=QTextListFormat::ListSquare;            break;        case 4:            style=QTextListFormat::ListDecimal;            break;        case 5:            style=QTextListFormat::ListLowerAlpha;            break;        case 6:            style=QTextListFormat::ListUpperAlpha;            break;        case 7:            style=QTextListFormat::ListLowerRoman;            break;        case 8:            style=QTextListFormat::ListUpperRoman;            break;        default:            style=QTextListFormat::ListStyleUndefined;//0            break;        }        QTextCursor cursor=edit->textCursor();        cursor.beginEditBlock();        QTextBlockFormat blockFormat=cursor.blockFormat();        QTextListFormat listFormat;        QTextList*list=cursor.currentList();        if(list)        {            listFormat=list->format();            list->remove(cursor.block());            blockFormat.setIndent(0);            cursor.setBlockFormat(blockFormat);        }        listFormat.setStyle(style);        cursor.createList(listFormat);        cursor.endEditBlock();    }}void MainWindow::on_fontComboBox_activated(const QString &arg1){    TextEdit* edit=activateWindow();    if(edit)    {        QTextCharFormat format;        format.setFontFamily(arg1);        edit->mergeCurrentCharFormat(format);    }}void MainWindow::on_comboBoxFontSize_activated(const QString &arg1){    TextEdit* edit=activateWindow();    if(edit)    {        QTextCharFormat format;        format.setFontPointSize(arg1.toInt());        edit->mergeCurrentCharFormat(format);    }}

textedit.h

#ifndef TEXTEDIT_H#define TEXTEDIT_H#include <QTextEdit>class TextEdit : public QTextEdit{     Q_OBJECTpublic:    TextEdit(QWidget*parent=nullptr);    ~TextEdit();    void initNewDoc(); //初始化新建文档    QString getDocFilePath()const;//获取文件路径    bool loadDoc(const QString&docName);//读取文件内容    bool saveDoc();//保存文档    bool saveAsDoc();//另存为    QString getDocWindowTitle()const;protected:    void closeEvent(QCloseEvent *event)override;//重写关闭事件private:    QString getDocName()const;    void initOpenDoc(const QString&docName);//初始化打开的文档    bool writeToDoc(const QString&docName);//写文件    bool promptSave();//提示是否保存private slots:    void setWindowModality();//设置WindowModality属性private:    QString docWindowTitle; //文档标题    static int docNo;//文档编号    QString docFilePath;//文档路径};#endif // TEXTEDIT_H

textedit.cpp

#include "textedit.h"#include <QFile>#include <QFileInfo>#include <QFileDialog>#include <QTextDocumentWriter>#include <QCloseEvent>#include <QMessageBox>int TextEdit::docNo=1;TextEdit::TextEdit(QWidget *parent):QTextEdit(parent){    setAttribute(Qt::WA_DeleteOnClose);//关闭窗口时,释放资源    docWindowTitle="";    docFilePath="";//路径初始化为空可以区分是否是打开的文档}TextEdit::~TextEdit(){}void TextEdit::initNewDoc(){    docWindowTitle=QString("文档 %1").arg(docNo++);    //使用windowModified机制,添加[*]占位符    //当窗口显示的文档未保存时,*就显示出来    setWindowTitle(docWindowTitle + "[*]");    //当文档内容发生改变,发出contentsChanged信号    //document() 返回当前TextEdit文档    connect(document(),&QTextDocument::contentsChanged,this,&TextEdit::setWindowModality);}QString TextEdit::getDocFilePath() const{    return this->docFilePath;}QString TextEdit::getDocName() const{    return QFileInfo(this->docFilePath).fileName();//获取文件名称}bool TextEdit::loadDoc(const QString &docName){    if(!docName.isEmpty())    {        QFile file(docName);        if(!file.exists())return false;//文件不存在        if(!file.open(QFile::ReadOnly))return false;//打开文件失败        QByteArray text=file.readAll();//读取文件内容        if(Qt::mightBeRichText(text))//如果是富文件        {            setHtml(text);//富文本显示        }        else        {            setPlainText(text);//纯文本显示        }        initOpenDoc(docName);    }    return true;}bool TextEdit::saveDoc(){    if(document()->isModified())//文档是否被修改    {        if(!docFilePath.isEmpty())//路径是否为空        {            return writeToDoc(docFilePath);//写文件        }        else        {            return saveAsDoc();//另存为        }    }    return false;}bool TextEdit::saveAsDoc(){    QString docName=QFileDialog::getSaveFileName(this,"另存为","./","HTML文档(*.html);;文本文件(*.txt)");    if(docName.isEmpty())return false;    return writeToDoc(docName);}QString TextEdit::getDocWindowTitle() const{    return this->docWindowTitle;}bool TextEdit::promptSave(){    if(!document()->isModified())    {        return true;    }    QMessageBox::StandardButton res;    res=QMessageBox::warning(this,"提示",QString("%1已修改,是否保存?").arg(docWindowTitle),                         QMessageBox::Yes|QMessageBox::No|QMessageBox::Cancel);    if(res==QMessageBox::Yes)    {        return saveDoc();    }    else if(res==QMessageBox::No)    {        return true;    }    else if(res==QMessageBox::Cancel)    {        return false;    }}void TextEdit::closeEvent(QCloseEvent *event){    if(promptSave())    {        event->accept();    }    else    {        event->ignore();    }}void TextEdit::initOpenDoc(const QString &docName){    docFilePath=QFileInfo(docName).canonicalFilePath();    docWindowTitle=getDocName()+" "+QString::number(docNo++);    setWindowTitle(docWindowTitle + "[*]");    connect(document(),&QTextDocument::contentsChanged,this,&TextEdit::setWindowModality);}bool TextEdit::writeToDoc(const QString &docName){    //QTextDocumentWriter将QTextDocument写入文件    QTextDocumentWriter docWriter(docName);    if(docWriter.write(document()))    {        docFilePath=QFileInfo(docName).canonicalFilePath();        document()->setModified(false);//文档未改动        setWindowModified(false);//不显示占位符标识    }    return true;}void TextEdit::setWindowModality(){    setWindowModified(document()->isModified());//根据是否改动来设置是否显示*}

二十三.最后

现在是2024年9月20日15:57:22,让时间见证这一切吧,继续前进!