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我試圖創建一個我創建的自定義項的向量，但我遇到了一個很奇怪的問題。自定義類的向量
當我創建我的類的實例時，我沒有任何問題，但是當我嘗試添加矢量時，我有一個很長的錯誤，我不知道該怎麼做。
我不知道它是否有幫助，但m_mesureList是類PanneauMesure的私有屬性。
宣言中的.H：
std::vector<Mesure> m_mesureList;
用途：
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);
}
錯誤：
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
編輯，如果它可以幫助：
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);
}
您是否爲您的班級定義了copy-ctor？ – dirkgently
我不這麼認爲，因爲我不知道copy-ctor是什麼。 – Leo
複製構造函數通常需要執行對象的「深層」副本。它創建它自己的所有基本類型和對象的實例，以便它不引用原始內容。如果程序員沒有定義複製構造函數，編譯器將默認構建一個，這通常會導致共享引用。 –