Qt 4.8: Q3ListBoxItem Class Reference

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# Q3ListBoxItem Class Reference

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

     #include <Q3ListBoxItem>

This class is part of the Qt 3 support library. It is provided to keep old source code working. We strongly advise against using it in new code. See Porting to Qt 4 for more information.

Inherited by: Q3ListBoxPixmap and Q3ListBoxText.

- List of all members, including inherited members

## Public Functions

| 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

## Protected Functions

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

## Detailed Description

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() and width().

See also Q3ListBox.

## Member Function Documentation

### 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 is 0.

### Q3ListBoxItem::~Q3ListBoxItem ()`[virtual]`

Destroys the list box item.

### bool Q3ListBoxItem::current () const

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

### int Q3ListBoxItem::height ( const Q3ListBox * lb ) const`[virtual]`

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.

The default implementation returns QApplication::globalStrut()'s height.

See also paint() and width().

### bool Q3ListBoxItem::isCurrent () const

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

See also Q3ListBox::currentItem(), Q3ListBox::item(), and isSelected().

### bool Q3ListBoxItem::isSelectable () const

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

See also setSelectable().

### bool Q3ListBoxItem::isSelected () const

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

See also Q3ListBox::isSelected() and 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.

See also prev().

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

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

See also height() and width().

### const QPixmap * Q3ListBoxItem::pixmap () const`[virtual]`

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.

See also next().

### int Q3ListBoxItem::rtti () const`[virtual]`

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

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

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

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

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

See also isSelected() and paint().

### void Q3ListBoxItem::setSelectable ( bool b )

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

See also isSelectable().

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

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

See also text().

### QString Q3ListBoxItem::text () const`[virtual]`

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

See also setText().

### int Q3ListBoxItem::width ( const Q3ListBox * lb ) const`[virtual]`

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.

The default implementation returns QApplication::globalStrut()'s width.

See also paint() and height().