On including a custom class widget, I'm getting the following errors. How do I fix this ?
Qt Code: 
  1. C:\Qt\Qt5.0.2\5.0.2\msvc2010\include\QtCore\qdatetime.h:123: error: C2589: '(' : illegal token on right side of '::'
  2. C:\Qt\Qt5.0.2\5.0.2\msvc2010\include\QtCore\qdatetime.h:123: error: C2059: syntax error : '::'
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My custom class looks like this -
Qt Code: 
  1. //cbackbtnanime.h
  2. #ifndef CBACKBTNANIME_H
  3. #define CBACKBTNANIME_H
  4.  
  5. #include <QtGui>
  6. #include <QWidget>
  7. #include <QPushButton>
  8. #include <QHBoxLayout>
  9. #include <QStyleOption>
  10.  
  11. class CBackBtnAnime : public QWidget
  12. {
  13.     Q_OBJECT
  14. private:
  15.     QPushButton *backBtn;
  16.     QHBoxLayout *hLyt;
  17.     QPropertyAnimation * mAnimation;
  18.  
  19. public:
  20.     explicit CBackBtnAnime(QWidget *parent = 0);
  21. protected:
  22.     void paintEvent(QPaintEvent *pe)
  23.     {
  24.         Q_UNUSED(pe);
  26.         o.initFrom(this);
  27.         QPainter p(this);
  28.         style()->drawPrimitive(QStyle::PE_Widget, &o, &p, this);
  29.     }
  30.  
  31.     bool eventFilter(QObject * object, QEvent * event)
  32.     {
  33.         if((parent() == object) & (event->type() == QEvent::MouseMove))
  34.         {
  35.             QMouseEvent * mouseEvent = static_cast<QMouseEvent *>(event);
  36.             if((mouseEvent->pos().x() < 50) && (mouseEvent->pos().y() < 30))
  37.             {
  38.                 if(isHidden() && (mAnimation->state() != mAnimation->Running))
  39.                 {
  40.                     mAnimation->setStartValue(QRect(-2, 1, 0, 28));
  41.                     mAnimation->setEndValue(QRect(0, 1, 50, 28));
  42.                     disconnect(mAnimation, SIGNAL(finished()), this, SLOT(hide()));
  43.                     mAnimation->start();
  44.                     show();
  45.                 }
  46.             }
  47.             else if(mAnimation->state() != mAnimation->Running)
  48.             {
  49.                 if(!isHidden())
  50.                 {
  51.                     mAnimation->setEndValue(QRect(-2, 1, 0, 28));
  52.                     mAnimation->setStartValue(QRect(0, 1, 50, 28));
  53.                     connect(mAnimation, SIGNAL(finished()), this, SLOT(hide()));
  54.                     mAnimation->start();
  55.                 }
  56.             }
  57.         }
  58.  
  59.         if((event->type() == QEvent::Leave) && (mAnimation->state() != mAnimation->Running))
  60.         {
  61.             qDebug("Inside QEvent::Leave");
  62.             if(!isHidden())
  63.             {
  64.                 mAnimation->setEndValue(QRect(-2, 2, 0, 28));
  65.                 mAnimation->setStartValue(QRect(0, 2, 50, 28));
  66.                 connect(mAnimation, SIGNAL(finished()), this, SLOT(hide()));
  67.                 mAnimation->start();
  68.             }
  69.         }
  70.  
  71.         return QWidget::eventFilter(object, event);
  72.     }
  73.  
  74. signals:
  75.     void backBtnClicked();
  76.  
  77. public slots:
  78.  
  79. };
  80. #endif // CBACKBTNANIME_H
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Qt Code: 
  1. //cbackbtmanime.cpp
  2. #include "cbackbtnanime.h"
  3.  
  4. CBackBtnAnime::CBackBtnAnime(QWidget *parent) :
  5.     QWidget(parent)
  6. {
  7.     this->setMouseTracking(true);
  8.     this->installEventFilter(this);
  9.     this->setStyleSheet("background-color: #454545;");
  10.     parent->installEventFilter(this);
  11.     mAnimation = new QPropertyAnimation(this, "geometry");
  12.     mAnimation->setDuration(250);
  13.  
  14.     backBtn = new QPushButton(this);
  15.     backBtn->setFixedSize(50, 28);
  16.     backBtn->setIcon(QIcon(":/imgs/backToHome.png"));
  17.     backBtn->setIconSize(QSize(50, 28));
  18.     backBtn->setStyleSheet("QPushButton { background: transparent; border: 0px; border-radius: 20px; padding: 0px;}"
  19.                            "QPushButton:hover {background: transparent; border: 1px solid #4cd3f5;}"
  20.                            "QPushButton:pressed {background: transparent; border: 2px solid #4cd3f5;}"
  21.                            "QToolTip {background: white; color: black; }");
  22.  
  23.     connect(backBtn, SIGNAL(clicked()), this, SIGNAL(backBtnClicked()));
  24.  
  25.     hLyt = new QHBoxLayout();
  26.     hLyt->setContentsMargins(0, 0, 0, 0);
  27.     this->setLayout(hLyt);
  28.     hLyt->addWidget(backBtn);
  29.  
  30. }
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Kindly help me fix this issue. Thank you.