如何序列化和反序列化富文本在QTextEdit？ [英] How to serialize and deserialize rich text in QTextEdit?

问题描述

我承诺+10 upvote到这个问题的答案只是从我身边！更重要的是，如果有办法，我会将所有的评分给正确答案的人，因为我需要实现这一点。

说我有这样的结构：

  class AAA 
 {
 BBB bb_member; 
 double dbl_member; 
 .................... 
} 
 
 class BBB 
 {
 int int_member ; 
 QString QStr_member; 
 
 ................. 
 QTextEdit m_textEdit; 
} 
  

对于AAA，我定义这个运算符：

  QDataStream& operator  {
 out< aa.bb_member 
<< aa.dbl_member; 
 return out; 
} 
 
 QDataStream& operator>>（QDataStream& in，AAA& aa）
 {
 BBB bb_memb; 
 double dbk_memb; 
 
在>> bb_memb 
>> dbk_memb; 
 
 aa = AAA（bb_memb，dbk_memb）; 
 
 return in; 
} 
  

然后我称之为：

  QFile文件（myFileName）; 
 file.open（QIODevice :: WriteOnly））
 QDataStream out（& file）; 
 out<< AAA_object; 
  

以便将AAA对象序列化为文件。

现在的问题。如何为BBB类定义QDataStream操作符，以便序列化BBB对象（int，QString和 QTextEdit到达文本内容），同时调用 out< AAA_object;

解决方案

我已完成此任务。我已经保存在QVector中的图像。序列化向量和HTML代码。然后反序列化的代码和QVector。使用此函数添加所有图片作为资源：

  for（int i = 0; i  {
 QUrl url（QString（image_％1）。arg（i））; 
 textEdit-> document（） - > addResource（QTextDocument :: ImageResource，url，vectorOfImages.at（i））; 
} 
  

然后执行以下

  int count = 0; 
 int pos = 0; 
 
 QRegExp rx（ while（（pos = rx.indexIn（htmlCode，pos））！= -1 ）
 {
 QString strToReplace（QString（< img src = \image_％1\/>\").arg(count））; 
 htmlCode.replace pos，rx.matchedLength（），strToReplace）; 
 pos + = rx.matchedLength（）; 
 count ++; 
} 
 
 textEdit-> setText（htmlCode ）; 
  

工作得很好！

I promise +10 upvotes to the answer of this question just from my side! Even more, if there is a way, I will give all my rating to the person who will answer with a correct answer, because I need to implement this very much.

Say I have a structure like this:

class AAA
{
    BBB      bb_member;
    double   dbl_member;
    ....................
}

class BBB
{
    int             int_member;
    QString         QStr_member;

    .................
    QTextEdit       m_textEdit;
}

And for AAA I define this operators:

QDataStream &operator<<(QDataStream &out, const AAA &aa)
{
    out << aa.bb_member
        << aa.dbl_member;
    return out;
}

QDataStream &operator>>(QDataStream &in, AAA &aa)
{
    BBB bb_memb;
    double dbk_memb;

    in >> bb_memb
       >> dbk_memb;

    aa = AAA(bb_memb, dbk_memb);

    return in;
}

Then I call this:

QFile file("myFileName");
file.open(QIODevice::WriteOnly))
QDataStream out(&file);
out << AAA_object;

in order to serialize AAA object to a file.

Now the question. How I should define QDataStream operators for BBB class in order to serialize BBB object (int, QString and QTextEdit reach text content), while calling out << AAA_object; ???

解决方案

I have already compleated this task. I have saved the images in a QVector. Serialized the vector and the HTML code. Then deserialized the code and the QVector. Added all the images as a resource with this function:

for(int i = 0; i < vectorOfImages.size(); i++ )
{
    QUrl url(QString("image_%1").arg(i));
    textEdit->document()->addResource(QTextDocument::ImageResource, url,  vectorOfImages.at(i));
}

Then Does the following

int count = 0;
int pos = 0;

QRegExp rx("<img src=\".+/>");
while ((pos = rx.indexIn(htmlCode, pos)) != -1)
{
    QString strToReplace(QString("<img src=\"image_%1\" />").arg(count));
    htmlCode.replace(pos, rx.matchedLength(), strToReplace);
    pos += rx.matchedLength();
    count++;
}

textEdit->setText(htmlCode);

Works fine! And I will have my former rating :)))!

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