Qt实现类似shell的东东 可是用不了 错在哪里呢

lrlf123

1. 
   
2. #include "shelldemo.h"
   
3. #include <QLineEdit>
   
4. #include <QTextBlock>
   
5. #include <QDebug>
   
6. #include <QPlainTextEdit>
   
7. //#include <private/qplaintextedit_p.h> //无法找到
   
8. 
   
9. #if QT_VERSION >= QT_VERSION_CHECK(5, 0, 0)
   
10. #include <private/v8.h>
    
11. #endif
    
12. 
    
13. ShellDemo::ShellDemo(QWidget *parent) :
    
14.     QPlainTextEdit(parent)
    
15. {
    
16.     setReadOnly(true);
    
17. 
    
18.     QFont font = this->font();
    
19.     font.setPointSize(font.pointSize()+2);
    
20.     this->setFont(font);
    
21. 
    
22.     appendPlainText(">>> ");
    
23.     edit = new QLineEdit(this->viewport());
    
24.     edit->setStyleSheet("border-style:none; background-color:transparent;");
    
25. 
    
26.     connect(edit, SIGNAL(returnPressed()), SLOT(onEditFinished()));
    
27.     //connect(verticalScrollBar(), SIGNAL(valueChanged(int)), SLOT(onScrollBarValueChanged()));
    
28. }
    
29. 
    
30. void ShellDemo::resizeEvent(QResizeEvent *e)
    
31. {
    
32.     updateEditPosition();
    
33. }
    
34. 
    
35. void ShellDemo::onScrollBarValueChanged()
    
36. {
    
37.     updateEditPosition();
    
38. }
    
39. 
    
40. QString ShellDemo::runCommand(const QString &cmd)
    
41. {
    
42.     return QString("Result of %1").arg(cmd);
    
43. }
    
44. 
    
45. void ShellDemo::onEditFinished()
    
46. {
    
47.     QString cmd = edit->text();
    
48.     if (cmd.isEmpty()) {
    
49.         return;
    
50.     }
    
51.     moveCursor(QTextCursor::End);
    
52.     insertPlainText(cmd);
    
53.     //edit->hide();
    
54.     edit->clear();
    
55. 
    
56.     appendPlainText(runCommand(cmd));
    
57. 
    
58.     appendPlainText(">>> ");
    
59.     updateEditPosition();
    
60.     edit->show();
    
61.     edit->setFocus();
    
62. }
    
63. 
    
64. void ShellDemo::updateEditPosition()
    
65. {
    
66.     QPlainTextEditPrivate *d = reinterpret_cast<QPlainTextEditPrivate*>(qGetPtrHelper(d_ptr));
    
67. 
    
68.     //QRectF rect = d->control->blockBoundingRect(d->control->document()->lastBlock());  //无法通过编译
    
69.     //edit->move(rect.topRight().toPoint());
    
70.     //edit->resize(viewport()->size().width(), edit->size().height());
    
71. }

复制代码

按照 http://blog.csdn.net/dbzhang800/article/details/6751775 的方法在qt4.85环境下无法编译通过

报错信息是
错误1 找不到#include <private/qplaintextedit_p.h>

错误2 invalid use of undefined type ‘struct QPlainTextEditPrivate’
/usr/local/Trolltech/Qt-4.8.5/include/QtGui/qplaintextedit.h:65: 错误：forward declaration of ‘struct QPlainTextEditPrivate’

就是出在 QRectF rect = d->control->blockBoundingRect(d->control->document()->lastBlock()) 这一句
好像私有类不能这么用
求高人解释 急求！