QSettings保存程序设置

文本编辑窗口

        TextEditor继承了QTextEdit，主要实现文本编辑和文本格式设置。保存文本信息时直接用的html字符串形式保存，可以同时保存文本的格式。

class TextEditor:public QTextEdit  
{  
    Q_OBJECT  
public:  
    TextEditor(QWidget *parent = NULL);  
    ~TextEditor();  
  
    void SaveSettings();  
  
protected:  
    void ReadSettings();  
    void contextMenuEvent ( QContextMenuEvent * event );  
private slots:  
    void SettingBackColorSlot();  
    void SettingTextColorSlot();  
    void SettingTextFontSlot();  
};  

TextEditor::TextEditor( QWidget *parent /*= NULL*/ ):QTextEdit(parent)  
{  
    ReadSettings();  
}  
  
TextEditor::~TextEditor()  
{  
  
}  
  
void TextEditor::contextMenuEvent( QContextMenuEvent * event )  
{  
    QMenu *pMenu = createStandardContextMenu();  
    pMenu->addSeparator();  
      
    QTextCursor cursor = this->textCursor();  
    QString seletedText = cursor.selectedText();  
    if (!seletedText.isEmpty())     //选中文本才可以设置文本样式  
    {  
        QMenu *pSubMenu = new QMenu(tr("设置"),pMenu);  
        pMenu->addMenu(pSubMenu);  
        QAction *pFontAct = new QAction(tr("字体"),pSubMenu);  
        QAction *pTextColorAct = new QAction(tr("字体颜色"),pSubMenu);  
        QAction *pBackColorAct = new QAction(tr("背景色"),pSubMenu);  
        pSubMenu->addAction(pFontAct);  
        pSubMenu->addAction(pTextColorAct);  
        pSubMenu->addAction(pBackColorAct);  
  
        connect(pFontAct,SIGNAL(triggered ()),this,SLOT(SettingTextFontSlot()));  
        connect(pTextColorAct,SIGNAL(triggered ()),this,SLOT(SettingTextColorSlot()));  
        connect(pBackColorAct,SIGNAL(triggered ()),this,SLOT(SettingBackColorSlot()));  
    }  
    pMenu->exec(event->globalPos());  
    delete pMenu;  
}  

//设置文本背景色  
void TextEditor::SettingBackColorSlot()  
{  
    QColor color = QColorDialog::getColor(Qt::white, this, "Select Color", QColorDialog::DontUseNativeDialog);   
    if(color.isValid())   
    {   
        this->setTextBackgroundColor(color);   
    }   
}  
//设置文本颜色  
void TextEditor::SettingTextColorSlot()  
{  
    QColor color = QColorDialog::getColor(Qt::black, this, "Select Color", QColorDialog::DontUseNativeDialog);   
    if(color.isValid())   
    {   
        this->setTextColor(color);   
    }  
}  
//设置文本字体  
void TextEditor::SettingTextFontSlot()  
{  
    bool ok;   
    QFont font = QFontDialog::getFont(&ok, this);   
    if (ok)   
    {   
        QTextCursor cur = this->textCursor();   
        QString sltStr = cur.selectedText();   
        this->cut();   
        QTextCharFormat fmtText;   
        fmtText.setFont(font);   
        cur.insertText(sltStr,fmtText);   
    }   
}  
//退出前保存文本信息  
void TextEditor::SaveSettings()  
{  
    QSettings TextSettings("Mysoft","TextData");  
    QString html = this->toHtml();  
    TextSettings.setValue("text",html);  
}  
//启动时读取信息  
void TextEditor::ReadSettings()  
{  
    QSettings TextSettings("Mysoft","TextData");  
    QString html = TextSettings.value("text").toString();  
    this->setHtml(html);  
}  

程序主窗口

class TextEdit : public QMainWindow  
{  
    Q_OBJECT  
  
public:  
    TextEdit(QWidget *parent = 0, Qt::WFlags flags = 0);  
    ~TextEdit();  
  
protected:  
    void closeEvent ( QCloseEvent * event ) ;  
    void ReadSettings();  
private:  
    TextEditor   *m_pCentralWidget;  
};  

TextEdit::TextEdit(QWidget *parent, Qt::WFlags flags)  
    : QMainWindow(parent, flags)  
{  
    m_pCentralWidget = new TextEditor(this);  
    this->setCentralWidget(m_pCentralWidget);  
    ReadSettings();  
}  
  
TextEdit::~TextEdit()  
{  
  
}  
  
void TextEdit::closeEvent( QCloseEvent * event )  
{  
    QSettings dialogSettings("Mysoft","dialogData");   //保存窗口位置和大小  
    dialogSettings.setValue("Rect",this->rect());  
    QPoint pos = this->pos();  
    dialogSettings.setValue("positionX",this->pos().x());  
    dialogSettings.setValue("positionY",this->pos().y());  
    m_pCentralWidget->SaveSettings();  
}  
  
void TextEdit::ReadSettings()  
{  
    QSettings dialogSettings("Mysoft","dialogData");  //读取窗口位置和大小  
    dialogSettings.setValue("Rect",this->rect());  
    dialogSettings.setValue("position",this->pos());  
    QRect rect = dialogSettings.value("Rect").value<QRect>();  
    this->setGeometry(rect);  
    int posX = dialogSettings.value("positionX").toInt();  
    int posY = dialogSettings.value("positionY").toInt();  
    this->move(QPoint(posX,posY));      
}