QComboBox 使用_综合

QComboBox

QComboBox Class类简介
Public Types
Public Functions

QComboBox Class类简介

The QComboBox widget is a combined button and popup list.
Header:#include
qmake:QT += widgets
Inherits:QWidget
Inherited By:QFontComboBox
List of all members, including inherited members(所有成员的列表，包括继承的成员)
Obsolete members (过时的成员)

Public Types

enum	InsertPolicy { NoInsert, InsertAtTop, InsertAtCurrent, InsertAtBottom, …, InsertAlphabetically }

This enum specifies what the QComboBox should do when a new string is entered by the user.
这个枚举指定当用户输入一个新字符串时QComboBox应该做什么。

Constant 常量	Value 值	Description 说明
QComboBox::NoInsert	0	The string will not be inserted into the combobox.
QComboBox::InsertAtTop	1	The string will be inserted as the first item in the combobox.
QComboBox::InsertAtCurrent	2	The current item will be replaced by the string.
QComboBox::InsertAtBottom	3	The string will be inserted after the last item in the combobox.
QComboBox::InsertAfterCurrent	4	The string is inserted after the current item in the combobox.
QComboBox::InsertBeforeCurrent	5	The string is inserted before the current item in the combobox.
QComboBox::InsertAlphabetically	6	The string is inserted in the alphabetic order in the combobox.

enum	SizeAdjustPolicy { AdjustToContents, AdjustToContentsOnFirstShow, AdjustToMinimumContentsLength, AdjustToMinimumContentsLengthWithIcon }

This enum specifies how the size hint of the QComboBox should adjust when new content is added or content changes.
这个枚举指定当添加新内容或内容更改时QComboBox的大小提示应该如何调整。

Constant	Value	Description

QComboBox::AdjustToContents	0	The combobox will always adjust to the contents
QComboBox::AdjustToContentsOnFirstShow	1	The combobox will adjust to its contents the first time it is shown.
QComboBox::AdjustToMinimumContentsLength	2	Use AdjustToContents or AdjustToContentsOnFirstShow instead.
QComboBox::AdjustToMinimumContentsLengthWithIcon	3	The combobox will adjust to minimumContentsLength plus space for an

Public Functions

	QComboBox(QWidget *parent = Q_NULLPTR)
	~QComboBox()
void	addItem(const QString &text, const QVariant &userData = QVariant())
void	addItem(const QIcon &icon, const QString &text, const QVariant &userData = QVariant())
void	addItems(const QStringList &texts)
QCompleter *	completer() const
int	count() const
QVariant	currentData(int role = Qt::UserRole) const
int	currentIndex() const
QString	currentText() const
bool	duplicatesEnabled() const
int	findData(const QVariant &data, int role = Qt::UserRole, Qt::MatchFlags flags =
int	findText(const QString &text, Qt::MatchFlags flags = static_castQt::MatchFlags (
bool	hasFrame() const
virtual void	hidePopup()
QSize	iconSize() const
void	insertItem(int index, const QString &text, const QVariant &userData = QVariant())
void	insertItem(int index, const QIcon &icon, const QString &text, const QVariant &userData
void	insertItems(int index, const QStringList &list)
InsertPolicy	insertPolicy() const
void	insertSeparator(int index)
bool	isEditable() const
QVariant	itemData(int index, int role = Qt::UserRole) const
QAbstractItemDelegate *	itemDelegate() const
QIcon	itemIcon(int index) const
QString	itemText(int index) const 某下标对应的内容
QLineEdit *	lineEdit() const
int	maxCount() const
int	maxVisibleItems() const
int	minimumContentsLength() const
QAbstractItemModel *	model() const
int	modelColumn() const
void	removeItem(int index)
QModelIndex	rootModelIndex() const
void	setCompleter(QCompleter *completer)
void	setDuplicatesEnabled(bool enable)
void	setEditable(bool editable)
void	setFrame(bool)
void	setIconSize(const QSize &size)
void	setInsertPolicy(InsertPolicy policy)
void	setItemData(int index, const QVariant &value, int role = Qt::UserRole)
void	setItemDelegate(QAbstractItemDelegate *delegate)
void	setItemIcon(int index, const QIcon &icon)
void	setItemText(int index, const QString &text)
void	setLineEdit(QLineEdit *edit)
void	setMaxCount(int max)
void	setMaxVisibleItems(int maxItems)
void	setMinimumContentsLength(int characters)
void	setModel(QAbstractItemModel *model)
void	setModelColumn(int visibleColumn)
void	setRootModelIndex(const QModelIndex &index)
void	setSizeAdjustPolicy(SizeAdjustPolicy policy)
void	setValidator(const QValidator *validator)
void	setView(QAbstractItemView *itemView)
virtual void	showPopup()
SizeAdjustPolicy	sizeAdjustPolicy() const
const QValidator *	validator() const
QAbstractItemView *	view() const