Question

我正在尝试创建一个我创建的自定义项目的向量，但我遇到了一个非常奇怪的问题。

当我创建我的类的实例时，我没有任何问题但是当我尝试添加它时，我有一个很长的错误，我不知道该怎么做。

我不知道它是否有帮助，但m_mesureList是PanneauMesure类的私有属性。

.h中的声明：

std::vector<Mesure> m_mesureList;

使用：

void PanneauMesure::add(QPointF point1, QPointF point2, QPointF point3, QGraphicsItem *line1, QGraphicsItem *line2)
{
    Mesure mesure(point1, point2, point3, line1, line2, this);
    //m_mesureList.push_back(mesure);
}

错误：

In file included from ..\testQt\/PanneauMesure.h:21,
                 from ..\testQt\PanneauMesure.cpp:1:
d:\QtSDK\Desktop\Qt\4.8.1\mingw\include\QtGui/qwidget.h: In copy constructor 'Mesure::Mesure(const Mesure&)':
..\testQt\/Mesure.h:14:   instantiated from 'void __gnu_cxx::new_allocator<_Tp>::construct(_Tp*, const _Tp&) [with _Tp = Mesure]'
d:\qtsdk\mingw\bin\../lib/gcc/mingw32/4.4.0/include/c++/bits/stl_vector.h:737:   instantiated from 'void std::vector<_Tp, _Alloc>::push_back(const _Tp&) [with _Tp = Mesure, _Alloc = std::allocator<Mesure>]'
..\testQt\PanneauMesure.cpp:104:   instantiated from here
d:\QtSDK\Desktop\Qt\4.8.1\mingw\include\QtGui/qwidget.h:806: error: 'QWidget::QWidget(const QWidget&)' is private
..\testQt\/Mesure.h:14: error: within this context
In file included from d:\qtsdk\mingw\bin\../lib/gcc/mingw32/4.4.0/include/c++/mingw32/bits/c++allocator.h:34,
                 from d:\qtsdk\mingw\bin\../lib/gcc/mingw32/4.4.0/include/c++/bits/allocator.h:48,
                 from d:\qtsdk\mingw\bin\../lib/gcc/mingw32/4.4.0/include/c++/string:43,
                 from d:\QtSDK\Desktop\Qt\4.8.1\mingw\include/QtCore/qstring.h:54,
                 from d:\QtSDK\Desktop\Qt\4.8.1\mingw\include/QtCore/qobject.h:48,
                 from d:\QtSDK\Desktop\Qt\4.8.1\mingw\include\QtGui/qwidget.h:46,
                 from d:\QtSDK\Desktop\Qt\4.8.1\mingw\include\QtGui/QWidget:1,
                 from ..\testQt\/PanneauMesure.h:4,
                 from ..\testQt\PanneauMesure.cpp:1:
d:\qtsdk\mingw\bin\../lib/gcc/mingw32/4.4.0/include/c++/ext/new_allocator.h: In member function 'void __gnu_cxx::new_allocator<_Tp>::construct(_Tp*, const _Tp&) [with _Tp = Mesure]':
d:\qtsdk\mingw\bin\../lib/gcc/mingw32/4.4.0/include/c++/ext/new_allocator.h:105: note: synthesized method 'Mesure::Mesure(const Mesure&)' first required here 
In file included from ..\testQt\/PanneauMesure.h:21,
                 from ..\testQt\PanneauMesure.cpp:1:
d:\QtSDK\Desktop\Qt\4.8.1\mingw\include\QtGui/qwidget.h: In member function 'Mesure& Mesure::operator=(const Mesure&)':
..\testQt\/Mesure.h:14:   instantiated from 'void std::vector<_Tp, _Alloc>::_M_insert_aux(__gnu_cxx::__normal_iterator<typename std::_Vector_base<_Tp, _Alloc>::_Tp_alloc_type::pointer, std::vector<_Tp, _Alloc> >, const _Tp&) [with _Tp = Mesure, _Alloc = std::allocator<Mesure>]'
d:\qtsdk\mingw\bin\../lib/gcc/mingw32/4.4.0/include/c++/bits/stl_vector.h:741:   instantiated from 'void std::vector<_Tp, _Alloc>::push_back(const _Tp&) [with _Tp = Mesure, _Alloc = std::allocator<Mesure>]'
..\testQt\PanneauMesure.cpp:104:   instantiated from here
d:\QtSDK\Desktop\Qt\4.8.1\mingw\include\QtGui/qwidget.h:806: error: 'QWidget& QWidget::operator=(const QWidget&)' is private
..\testQt\/Mesure.h:14: error: within this context
In file included from d:\qtsdk\mingw\bin\../lib/gcc/mingw32/4.4.0/include/c++/vector:69,
                 from d:\QtSDK\Desktop\Qt\4.8.1\mingw\include/QtCore/qvector.h:52,
                 from d:\QtSDK\Desktop\Qt\4.8.1\mingw\include/QtGui/qbrush.h:47,
                 from d:\QtSDK\Desktop\Qt\4.8.1\mingw\include/QtGui/qpalette.h:47,
                 from d:\QtSDK\Desktop\Qt\4.8.1\mingw\include\QtGui/qwidget.h:49,
                 from d:\QtSDK\Desktop\Qt\4.8.1\mingw\include\QtGui/QWidget:1,
                 from ..\testQt\/PanneauMesure.h:4,
                 from ..\testQt\PanneauMesure.cpp:1:
d:\qtsdk\mingw\bin\../lib/gcc/mingw32/4.4.0/include/c++/bits/vector.tcc: In member function 'void std::vector<_Tp, _Alloc>::_M_insert_aux(__gnu_cxx::__normal_iterator<typename std::_Vector_base<_Tp, _Alloc>::_Tp_alloc_type::pointer, std::vector<_Tp, _Alloc> >, const _Tp&) [with _Tp = Mesure, _Alloc = std::allocator<Mesure>]':
d:\qtsdk\mingw\bin\../lib/gcc/mingw32/4.4.0/include/c++/bits/vector.tcc:312: note: synthesized method 'Mesure& Mesure::operator=(const Mesure&)' first required here

编辑，如果有帮助：

Mesure.cpp：

Mesure::Mesure(QPointF point1, QPointF point2, QPointF point3, QGraphicsItem *line1, QGraphicsItem *line2, QWidget *parent):
    QWidget(parent),
    m_hlayoutMesure(new QHBoxLayout(this)),
    m_buttonClose(new QToolButton(this)),
    m_labelAngle(new QLabel(this)),
    m_checkboxMesure(new QCheckBox(this)),
    m_point1(point1),
    m_point2(point2),
    m_point3(point3),
    m_line1(line1),
    m_line2(line2),
    m_angle(0)
{
    m_buttonClose->setText("X");
    m_labelAngle->setAlignment(Qt::AlignCenter);
    m_checkboxMesure->setChecked(true);
    m_hlayoutMesure->addWidget(m_checkboxMesure);
    m_hlayoutMesure->addWidget(m_labelAngle);
    m_hlayoutMesure->addWidget(m_buttonClose);
    m_hlayoutMesure->setSpacing(10);
    m_hlayoutMesure->setMargin(0);
    QObject::connect(m_buttonClose, SIGNAL(clicked()), this, SLOT(close()));
}

PanneauMesure.cpp：

PanneauMesure::PanneauMesure(QWidget *parent) :
    QWidget(parent),
    m_vlayoutTotal(new QVBoxLayout(this)),
    m_groupboxMesures(new QGroupBox("Mesures", this)),
    m_vlayoutGroupBoxMesures(new QVBoxLayout(m_groupboxMesures)),
    m_scrollareaMesures(new QScrollArea(m_groupboxMesures)),
    m_widgetMesures(new QWidget(m_groupboxMesures)),
    m_hlayoutMesures(new QHBoxLayout(m_widgetMesures)),
    m_vlayoutMesures(new QVBoxLayout(m_widgetMesures)),
    m_groupboxOptions(new QGroupBox("Options", this)),
    m_vlayoutOptions(new QVBoxLayout(m_groupboxOptions)),
    m_buttonRAZ(new QPushButton("Remise à zéro", m_groupboxOptions)),
    m_widgetAlpha(new QWidget(m_groupboxOptions)),
    m_hlayoutAlpha(new QHBoxLayout(m_widgetAlpha)),
    m_labelAlphaText(new QLabel("Alpha :", m_groupboxOptions)),
    m_labelAlphaValeur(new QLabel("50", m_groupboxOptions)),
    m_sliderAlpha(new QSlider(m_groupboxOptions)),
    m_hlayoutCouleur(new QHBoxLayout(m_groupboxOptions)),
    m_labelCouleur(new QLabel("Couleur :", m_groupboxOptions)),
    m_buttonCouleur(new QToolButton(m_groupboxOptions)),
    m_couleur(Qt::yellow),
    m_hlayoutLongueur(new QHBoxLayout(m_groupboxOptions)),
    m_labelLongueur(new QLabel("Longueur :  ", m_groupboxOptions)),
    m_spinboxLongueur(new QSpinBox(m_groupboxOptions)),
    m_longueur(20),
    m_hlayoutLargeur(new QHBoxLayout(m_groupboxOptions)),
    m_labelLargeur(new QLabel("Largeur :", m_groupboxOptions)),
    m_spinboxLargeur(new QSpinBox(m_groupboxOptions)),
    m_largeur(5),
    m_mesureList()
{
    // Alpha
    m_sliderAlpha->setMaximum(100);
    m_sliderAlpha->setValue(50);
    m_hlayoutAlpha->addWidget(m_labelAlphaText);
    m_hlayoutAlpha->addWidget(m_labelAlphaValeur);
    m_labelAlphaText->setAlignment(Qt::AlignRight);
    m_labelAlphaValeur->setAlignment(Qt::AlignLeft);
    m_sliderAlpha->setOrientation(Qt::Horizontal);
    QObject::connect(m_sliderAlpha, SIGNAL(valueChanged(int)), m_labelAlphaValeur, SLOT(setNum(int)));

    // Couleur
    QPixmap px(20, 20);
    px.fill(m_couleur);
    m_buttonCouleur->setIcon(px);
    m_hlayoutCouleur->addWidget(m_labelCouleur);
    m_hlayoutCouleur->addStretch(2);
    m_hlayoutCouleur->addWidget(m_buttonCouleur);
    m_hlayoutCouleur->addStretch(1);
    QObject::connect(m_buttonCouleur, SIGNAL(clicked()), this, SLOT(ouvrirCouleur()));

    // Longueur
    m_spinboxLongueur->setMinimum(1);
    m_spinboxLongueur->setValue(m_longueur);
    m_spinboxLongueur->setMaximum(999);
    m_hlayoutLongueur->addWidget(m_labelLongueur);
    m_hlayoutLongueur->addStretch(1);
    m_hlayoutLongueur->addWidget(m_spinboxLongueur);
    QObject::connect(m_spinboxLongueur, SIGNAL(valueChanged(int)), this, SLOT(sendParam()));

    // Largeur
    m_spinboxLargeur->setMinimum(1);
    m_spinboxLargeur->setMaximum(100);
    m_spinboxLargeur->setValue(m_largeur);
    m_hlayoutLargeur->addWidget(m_labelLargeur);
    m_hlayoutLargeur->addStretch(1);
    m_hlayoutLargeur->addWidget(m_spinboxLargeur);
    QObject::connect(m_spinboxLargeur, SIGNAL(valueChanged(int)), this, SLOT(sendParam()));

    // Options
    m_vlayoutOptions->addWidget(m_buttonRAZ);
    m_vlayoutOptions->addWidget(m_widgetAlpha);
    m_vlayoutOptions->addWidget(m_sliderAlpha);
    m_vlayoutOptions->addLayout((m_hlayoutCouleur));
    m_vlayoutOptions->addLayout((m_hlayoutLongueur));
    m_vlayoutOptions->addLayout((m_hlayoutLargeur));
    m_vlayoutOptions->setSpacing(0);
    QObject::connect(m_buttonRAZ, SIGNAL(clicked()), this, SLOT(remiseAZero()));

    // Mesures
    m_vlayoutMesures->addStretch(1);
    m_hlayoutMesures->addStretch(1);
    m_hlayoutMesures->addLayout(m_vlayoutMesures);
    m_hlayoutMesures->addStretch(1);
    m_widgetMesures->setLayout(m_hlayoutMesures);
    m_scrollareaMesures->setWidgetResizable(true);
    m_scrollareaMesures->setWidget(m_widgetMesures);
    m_scrollareaMesures->setFrameShape(QFrame::NoFrame);
    m_vlayoutGroupBoxMesures->addWidget(m_scrollareaMesures);
    m_vlayoutGroupBoxMesures->setMargin(0);

    // Total
    m_vlayoutTotal->addWidget(m_groupboxOptions);
    m_vlayoutTotal->addWidget(m_groupboxMesures);

}

void PanneauMesure::add(QPointF point1, QPointF point2, QPointF point3, QGraphicsItem *line1, QGraphicsItem *line2)
{
    Mesure mesure(point1, point2, point3, line1, line2, this);
    m_mesureList.push_back(mesure);
    //m_vlayoutMesures->insertWidget(0, &m_mesure);
    //QObject::connect(m_buttonRAZ, SIGNAL(clicked()), &m_mesure, SLOT(close()));
}

void PanneauMesure::remiseAZero()
{
    m_sliderAlpha->setValue(50);
    m_longueur = 20;
    m_spinboxLongueur->setValue(m_longueur);
    m_largeur = 5;
    m_spinboxLargeur->setValue(m_largeur);
    m_couleur = Qt::yellow;
    QPixmap px(20, 20);
    px.fill(m_couleur);
    m_buttonCouleur->setIcon(px);
    emit changementParam(m_couleur, m_longueur, m_largeur);
}

void PanneauMesure::ouvrirCouleur()
{
    QColor color = QColorDialog::getColor(m_couleur);
    if (color.isValid()) m_couleur=color;
    QPixmap px(20, 20);
    px.fill(m_couleur);
    m_buttonCouleur->setIcon(px);
    emit changementParam(m_couleur, m_longueur, m_largeur);
}

void PanneauMesure::sendParam()
{
    m_longueur = m_spinboxLongueur->value();
    m_largeur = m_spinboxLargeur->value();
    emit changementParam(m_couleur, m_longueur, m_largeur);
}

Answer 1

在错误日志中，似乎Mesure继承或包含QWidget，而不是可复制。在C ++ 03中，对序列中的类型的要求是它们是 copy-constructible ，而你的类型不是。

Answer 2

正如K-Ballo指出你不能拥有一系列不可复制构造的元素我只是存储了一系列像这样的指针：

声明：

std::vector<Mesure*> m_mesureList;

功能：

void PanneauMesure::add(QPointF point1, QPointF point2, QPointF point3, QGraphicsItem *line1, QGraphicsItem *line2)
{
    Mesure* mesure = new Mesure(point1, point2, point3, line1, line2, this);
    m_mesureList.push_back(mesure);
}

矢量自定义类

2 个答案: