内容

• 公共函数
• 保护函数
• 详细描述

Q3ListBoxItem Class

The Q3ListBoxItem class is the base class of all list box items. 更多...

头：	#include <Q3ListBoxItem>
继承者：	Q3ListBoxPixmap and Q3ListBoxText

• 所有成员列表，包括继承成员

公共函数

	Q3ListBoxItem (Q3ListBox * listbox = 0)
	Q3ListBoxItem (Q3ListBox * listbox , Q3ListBoxItem * after )
virtual	~Q3ListBoxItem ()
bool	current () const
virtual int	height (const Q3ListBox * lb ) const
bool	isCurrent () const
bool	isSelectable () const
bool	isSelected () const
Q3ListBox *	listBox () const
Q3ListBoxItem *	next () const
virtual const QPixmap *	pixmap () const
Q3ListBoxItem *	prev () const
virtual int	rtti () const
bool	selected () const
void	setSelectable (bool b )
virtual QString	text () const
virtual int	width (const Q3ListBox * lb ) const

保护函数

virtual void	paint (QPainter * p ) = 0
void	setCustomHighlighting (bool b )
virtual void	setText (const QString & text )

详细描述

The Q3ListBoxItem class is the base class of all list box items.

This class is an abstract base class used for all list box items. If you need to insert customized items into a Q3ListBox you must inherit this class and reimplement paint (), height () 和 width ().

另请参阅 Q3ListBox .

成员函数文档编制

Q3ListBoxItem:: Q3ListBoxItem ( Q3ListBox * listbox = 0)

Constructs an empty list box item in the list box listbox .

Q3ListBoxItem:: Q3ListBoxItem ( Q3ListBox * listbox , Q3ListBoxItem * after )

Constructs an empty list box item in the list box listbox and inserts it after the item after or at the beginning if after 为 0。

[虚拟] Q3ListBoxItem:: ~Q3ListBoxItem ()

Destroys the list box item.

bool Q3ListBoxItem:: current () const

使用 isCurrent () instead. Returns true if isCurrent () returns true.

[虚拟] int Q3ListBoxItem:: height (const Q3ListBox * lb ) const

Implement this function to return the height of your item. The lb parameter is the same as listBox () and is provided for convenience and compatibility.

默认实现返回 QApplication::globalStrut ()'s height.

另请参阅 paint () 和 width ().

bool Q3ListBoxItem:: isCurrent () const

Returns true if the item is the current item; otherwise returns false.

另请参阅 Q3ListBox::currentItem (), Q3ListBox::item ()，和 isSelected ().

bool Q3ListBoxItem:: isSelectable () const

Returns true if this item is selectable (the default); otherwise returns false.

另请参阅 setSelectable ().

bool Q3ListBoxItem:: isSelected () const

Returns true if the item is selected; otherwise returns false.

另请参阅 Q3ListBox::isSelected () 和 isCurrent ().

Q3ListBox * Q3ListBoxItem:: listBox () const

Returns a pointer to the list box containing this item.

Q3ListBoxItem * Q3ListBoxItem:: next () const

Returns the item that comes after this in the list box. If this is the last item, 0 is returned.

另请参阅 prev ().

[pure virtual protected] void Q3ListBoxItem:: paint ( QPainter * p )

Implement this function to draw your item. The painter, p , is already open for painting.

另请参阅 height () 和 width ().

[虚拟] const QPixmap * Q3ListBoxItem:: pixmap () const

Returns the pixmap associated with the item, or 0 if there isn't one.

The default implementation returns 0.

Q3ListBoxItem * Q3ListBoxItem:: prev () const

Returns the item which comes before this in the list box. If this is the first item, 0 is returned.

另请参阅 next ().

[虚拟] int Q3ListBoxItem:: rtti () const

Returns 0.

Make your derived classes return their own values for rtti(), and you can distinguish between listbox items. You should use values greater than 1000 preferably a large random number, to allow for extensions to this class.

bool Q3ListBoxItem:: selected () const

使用 isSelected () instead. Returns true if isSelected () returns true.

[protected] void Q3ListBoxItem:: setCustomHighlighting ( bool b )

Defines whether the list box item is responsible for drawing itself in a highlighted state when being selected.

若 b is false (the default), the list box will draw some default highlight indicator before calling paint ().

另请参阅 isSelected () 和 paint ().

void Q3ListBoxItem:: setSelectable ( bool b )

若 b is true (the default) then this item can be selected by the user; otherwise this item cannot be selected by the user.

另请参阅 isSelectable ().

[virtual protected] void Q3ListBoxItem:: setText (const QString & text )

Sets the text of the Q3ListBoxItem to text 。此 text is also used for sorting. The text is not shown unless explicitly drawn in paint ().

另请参阅 text ().

[虚拟] QString Q3ListBoxItem:: text () const

Returns the text of the item. This text is also used for sorting.

另请参阅 setText ().

[虚拟] int Q3ListBoxItem:: width (const Q3ListBox * lb ) const

Reimplement this function to return the width of your item. The lb parameter is the same as listBox () and is provided for convenience and compatibility.

默认实现返回 QApplication::globalStrut ()'s width.

另请参阅 paint () 和 height ().