QSettings保存程序设置

今天看了一些QSettings的简单用法，可以用来保存程序的设置，使得程序每次启动都可以显示上次关闭时的状态。我这里实现了一个简单的文本编辑窗口，可以设置文本的字体，字体的颜色和背景色。每次关闭程序都保存程序的几何大小，位置和文本以及文本所设置的格式，方便启动程序后继续编辑。

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));


}

http://blog.csdn.net/hai200501019/article/details/11179967