Unix/Linux Go Back    


CentOS 7.0 - man page for qlistviewitem (centos section 3qt)

Linux & Unix Commands - Search Man Pages
Man Page or Keyword Search:   man
Select Man Page Set:       apropos Keyword Search (sections above)


QListViewItem(3qt)							       QListViewItem(3qt)

NAME
       QListViewItem - Implements a list view item

SYNOPSIS
       #include <qlistview.h>

       Inherits Qt.

       Inherited by QCheckListItem.

   Public Members
       QListViewItem ( QListView * parent )
       QListViewItem ( QListViewItem * parent )
       QListViewItem ( QListView * parent, QListViewItem * after )
       QListViewItem ( QListViewItem * parent, QListViewItem * after )
       QListViewItem ( QListView * parent, QString label1, QString label2 = QString::null,
	   QString label3 = QString::null, QString label4 = QString::null, QString label5 =
	   QString::null, QString label6 = QString::null, QString label7 = QString::null, QString
	   label8 = QString::null )
       QListViewItem ( QListViewItem * parent, QString label1, QString label2 = QString::null,
	   QString label3 = QString::null, QString label4 = QString::null, QString label5 =
	   QString::null, QString label6 = QString::null, QString label7 = QString::null, QString
	   label8 = QString::null )
       QListViewItem ( QListView * parent, QListViewItem * after, QString label1, QString label2
	   = QString::null, QString label3 = QString::null, QString label4 = QString::null,
	   QString label5 = QString::null, QString label6 = QString::null, QString label7 =
	   QString::null, QString label8 = QString::null )
       QListViewItem ( QListViewItem * parent, QListViewItem * after, QString label1, QString
	   label2 = QString::null, QString label3 = QString::null, QString label4 =
	   QString::null, QString label5 = QString::null, QString label6 = QString::null, QString
	   label7 = QString::null, QString label8 = QString::null )
       virtual ~QListViewItem ()
       virtual void insertItem ( QListViewItem * newChild )
       virtual void takeItem ( QListViewItem * item )
       virtual void removeItem ( QListViewItem * item )  (obsolete)
       int height () const
       virtual void invalidateHeight ()
       int totalHeight () const
       virtual int width ( const QFontMetrics & fm, const QListView * lv, int c ) const
       void widthChanged ( int c = -1 ) const
       int depth () const
       virtual void setText ( int column, const QString & text )
       virtual QString text ( int column ) const
       virtual void setPixmap ( int column, const QPixmap & pm )
       virtual const QPixmap * pixmap ( int column ) const
       virtual QString key ( int column, bool ascending ) const
       virtual int compare ( QListViewItem * i, int col, bool ascending ) const
       virtual void sortChildItems ( int column, bool ascending )
       int childCount () const
       bool isOpen () const
       virtual void setOpen ( bool o )
       virtual void setup ()
       virtual void setSelected ( bool s )
       bool isSelected () const
       virtual void paintCell ( QPainter * p, const QColorGroup & cg, int column, int width, int
	   align )
       virtual void paintBranches ( QPainter * p, const QColorGroup & cg, int w, int y, int h )
       virtual void paintFocus ( QPainter * p, const QColorGroup & cg, const QRect & r )
       QListViewItem * firstChild () const
       QListViewItem * nextSibling () const
       QListViewItem * parent () const
       QListViewItem * itemAbove ()
       QListViewItem * itemBelow ()
       int itemPos () const
       QListView * listView () const
       virtual void setSelectable ( bool enable )
       bool isSelectable () const
       virtual void setExpandable ( bool enable )
       bool isExpandable () const
       void repaint () const
       virtual void sort ()
       void moveItem ( QListViewItem * after )
       virtual void setDragEnabled ( bool allow )
       virtual void setDropEnabled ( bool allow )
       bool dragEnabled () const
       bool dropEnabled () const
       virtual bool acceptDrop ( const QMimeSource * mime ) const
       void setVisible ( bool b )
       bool isVisible () const
       virtual void setRenameEnabled ( int col, bool b )
       bool renameEnabled ( int col ) const
       virtual void startRename ( int col )
       virtual void setEnabled ( bool b )
       bool isEnabled () const
       virtual int rtti () const
       virtual void setMultiLinesEnabled ( bool b )
       bool multiLinesEnabled () const

   Protected Members
       virtual void enforceSortOrder () const
       virtual void setHeight ( int height )
       virtual void activate ()
       bool activatedPos ( QPoint & pos )
       virtual void dropped ( QDropEvent * e )
       virtual void dragEntered ()
       virtual void dragLeft ()
       virtual void okRename ( int col )
       virtual void cancelRename ( int col )

DESCRIPTION
       The QListViewItem class implements a list view item.

       A list view item is a multi-column object capable of displaying itself in a QListView.

       The easiest way to use QListViewItem is to construct one with a few constant strings, and
       either a QListView or another QListViewItem as parent.

	       (void) new QListViewItem( listView, "Column 1", "Column 2" );
	       (void) new QListViewItem( listView->firstChild(), "A", "B", "C" );
       We've discarded the pointers to the items since we can still access them via their parent
       listView. By default, QListView sorts its items; this can be switched off with
       QListView::setSorting(-1).

       The parent must be another QListViewItem or a QListView. If the parent is a QListView, the
       item becomes a top-level item within that QListView. If the parent is another
       QListViewItem, the item becomes a child of that list view item.

       If you keep the pointer, you can set or change the texts using setText(), add pixmaps
       using setPixmap(), change its mode using setSelectable(), setSelected(), setOpen() and
       setExpandable(). You'll also be able to change its height using setHeight(), and traverse
       its sub-items. You don't have to keep the pointer since you can get a pointer to any
       QListViewItem in a QListView using QListView::selectedItem(), QListView::currentItem(),
       QListView::firstChild(), QListView::lastItem() and QListView::findItem().

       If you call delete on a list view item, it will be deleted as expected, and as usual for
       QObjects, if it has any child items (to any depth), all these will be deleted too.

       QCheckListItems are list view items that have a checkbox or radio button and can be used
       in place of plain QListViewItems.

       You can traverse the tree as if it were a doubly-linked list using itemAbove() and
       itemBelow(); they return pointers to the items directly above and below this item on the
       screen (even if none of them are actually visible at the moment).

       Here's how to traverse all of an item's children (but not its children's children, etc.):
       Example:

	       QListViewItem * myChild = myItem->firstChild();
	       while( myChild ) {
		   doSomething( myChild );
		   myChild = myChild->nextSibling();
	       }

       If you want to iterate over every item, to any level of depth use an iterator. To iterate
       over the entire tree, initialize the iterator with the list view itself; to iterate
       starting from a particular item, initialize the iterator with the item:

	       QListViewItemIterator it( listview );
	       while ( it.current() ) {
		   QListViewItem *item = it.current();
		   doSomething( item );
		   ++it;
	       }

       Note that the order of the children will change when the sorting order changes and is
       undefined if the items are not visible. You can, however, call enforceSortOrder() at any
       time; QListView will always call it before it needs to show an item.

       Many programs will need to reimplement QListViewItem. The most commonly reimplemented
       functions are: <center>.nf

       </center>

       Some subclasses call setExpandable(TRUE) even when they have no children, and populate
       themselves when setup() or setOpen(TRUE) is called. The dirview/dirview.cpp example
       program uses this technique to start up quickly: The files and subdirectories in a
       directory aren't inserted into the tree until they're actually needed.

       <center>
					    [Image Omitted]

       </center>

       See also QCheckListItem, QListView, and Advanced Widgets.

MEMBER FUNCTION DOCUMENTATION
QListViewItem::QListViewItem ( QListView * parent )
       Constructs a new top-level list view item in the QListView parent.

QListViewItem::QListViewItem ( QListViewItem * parent )
       Constructs a new list view item that is a child of parent and first in the parent's list
       of children.

QListViewItem::QListViewItem ( QListView * parent, QListViewItem * after )
       Constructs an empty list view item that is a child of parent and is after item after in
       the parent's list of children. Since parent is a QListView the item will be a top-level
       item.

QListViewItem::QListViewItem ( QListViewItem * parent, QListViewItem * after )
       Constructs an empty list view item that is a child of parent and is after item after in
       the parent's list of children.

QListViewItem::QListViewItem ( QListView * parent, QString label1, QString label2 =
       QString::null, QString label3 = QString::null, QString label4 = QString::null, QString
       label5 = QString::null, QString label6 = QString::null, QString label7 = QString::null,
       QString label8 = QString::null )
       Constructs a new top-level list view item in the QListView parent, with up to eight
       constant strings, label1, label2, label3, label4, label5, label6, label7 and label8
       defining its columns' contents.

       See also setText().

QListViewItem::QListViewItem ( QListViewItem * parent, QString label1, QString label2 =
       QString::null, QString label3 = QString::null, QString label4 = QString::null, QString
       label5 = QString::null, QString label6 = QString::null, QString label7 = QString::null,
       QString label8 = QString::null )
       Constructs a new list view item as a child of the QListViewItem parent with up to eight
       constant strings, label1, label2, label3, label4, label5, label6, label7 and label8 as
       columns' contents.

       See also setText().

QListViewItem::QListViewItem ( QListView * parent, QListViewItem * after, QString label1, QString
       label2 = QString::null, QString label3 = QString::null, QString label4 = QString::null,
       QString label5 = QString::null, QString label6 = QString::null, QString label7 =
       QString::null, QString label8 = QString::null )
       Constructs a new list view item in the QListView parent that is included after item after
       and that has up to eight column texts, label1, label2, label3, label4, label5, label6,
       label7 andlabel8.

       Note that the order is changed according to QListViewItem::key() unless the list view's
       sorting is disabled using QListView::setSorting(-1).

       See also setText().

QListViewItem::QListViewItem ( QListViewItem * parent, QListViewItem * after, QString label1,
       QString label2 = QString::null, QString label3 = QString::null, QString label4 =
       QString::null, QString label5 = QString::null, QString label6 = QString::null, QString
       label7 = QString::null, QString label8 = QString::null )
       Constructs a new list view item as a child of the QListViewItem parent. It is inserted
       after item after and may contain up to eight strings, label1, label2, label3, label4,
       label5, label6, label7 and label8 as column entries.

       Note that the order is changed according to QListViewItem::key() unless the list view's
       sorting is disabled using QListView::setSorting(-1).

       See also setText().

QListViewItem::~QListViewItem () [virtual]
       Destroys the item, deleting all its children and freeing up all allocated resources.

bool QListViewItem::acceptDrop ( const QMimeSource * mime ) const [virtual]
       Returns TRUE if the item can accept drops of type QMimeSource mime; otherwise returns
       FALSE.

       The default implementation does nothing and returns FALSE. A subclass must reimplement
       this to accept drops.

void QListViewItem::activate () [virtual protected]
       This virtual function is called whenever the user presses the mouse on this item or
       presses Space on it.

       See also activatedPos().

       Reimplemented in QCheckListItem.

bool QListViewItem::activatedPos ( QPoint & pos ) [protected]
       When called from a reimplementation of activate(), this function gives information on how
       the item was activated. Otherwise the behavior is undefined.

       If activate() was caused by a mouse press, the function sets pos to where the user clicked
       and returns TRUE; otherwise it returns FALSE and does not change pos.

       pos is relative to the top-left corner of this item.

       Warning: We recommend that you ignore this function; it is scheduled to become obsolete.

       See also activate().

void QListViewItem::cancelRename ( int col ) [virtual protected]
       This function is called if the user cancels in-place renaming of this item in column col
       (e.g. by pressing Esc).

       See also okRename().

int QListViewItem::childCount () const
       Returns how many children this item has. The count only includes the item's immediate
       children.

int QListViewItem::compare ( QListViewItem * i, int col, bool ascending ) const [virtual]
       Compares this list view item to i using the column col in ascending order. Returns < 0 if
       this item is less than i, 0 if they are equal and > 0 if this item is greater than i.

       This function is used for sorting.

       The default implementation compares the item keys (key()) using
       QString::localeAwareCompare(). A reimplementation can use different values and a different
       comparison function. Here is a reimplementation that uses plain Unicode comparison:

	   int MyListViewItem::compare( QListViewItem *i, int col,
					bool ascending ) const
	   {
	       return key( col, ascending ).compare( i->key( col, ascending) );
	   }
       We don't recommend using ascending so your code can safely ignore it.

       See also key(), QString::localeAwareCompare(), and QString::compare().

int QListViewItem::depth () const
       Returns the depth of this item.

       Example: dirview/dirview.cpp.

bool QListViewItem::dragEnabled () const
       Returns TRUE if this item can be dragged; otherwise returns FALSE.

       See also setDragEnabled().

void QListViewItem::dragEntered () [virtual protected]
       This function is called when a drag enters the item's bounding rectangle.

       The default implementation does nothing, subclasses may need to reimplement this function.

void QListViewItem::dragLeft () [virtual protected]
       This function is called when a drag leaves the item's bounding rectangle.

       The default implementation does nothing, subclasses may need to reimplement this function.

bool QListViewItem::dropEnabled () const
       Returns TRUE if this item accepts drops; otherwise returns FALSE.

       See also setDropEnabled() and acceptDrop().

void QListViewItem::dropped ( QDropEvent * e ) [virtual protected]
       This function is called when something was dropped on the item. e contains all the
       information about the drop.

       The default implementation does nothing, subclasses may need to reimplement this function.

void QListViewItem::enforceSortOrder () const [virtual protected]
       Makes sure that this object's children are sorted appropriately.

       This only works if every item from the root item down to this item is already sorted.

       See also sortChildItems().

QListViewItem * QListViewItem::firstChild () const
       Returns the first (top) child of this item, or 0 if this item has no children.

       Note that the children are not guaranteed to be sorted properly. QListView and
       QListViewItem try to postpone or avoid sorting to the greatest degree possible, in order
       to keep the user interface snappy.

       See also nextSibling() and sortChildItems().

       Example: checklists/checklists.cpp.

int QListViewItem::height () const
       Returns the height of this item in pixels. This does not include the height of any
       children; totalHeight() returns that.

void QListViewItem::insertItem ( QListViewItem * newChild ) [virtual]
       Inserts newChild into this list view item's list of children. You should not need to call
       this function; it is called automatically by the constructor of newChild.

       Warning: If you are using Single selection mode, then you should only insert unselected
       items.

void QListViewItem::invalidateHeight () [virtual]
       Invalidates the cached total height of this item, including all open children.

       See also setHeight(), height(), and totalHeight().

bool QListViewItem::isEnabled () const
       Returns TRUE if this item is enabled; otherwise returns FALSE.

       See also setEnabled().

bool QListViewItem::isExpandable () const
       Returns TRUE if this item is expandable even when it has no children; otherwise returns
       FALSE.

bool QListViewItem::isOpen () const
       Returns TRUE if this list view item has children and they are not explicitly hidden;
       otherwise returns FALSE.

       See also setOpen().

bool QListViewItem::isSelectable () const
       Returns TRUE if the item is selectable (as it is by default); otherwise returns FALSE

       See also setSelectable().

bool QListViewItem::isSelected () const
       Returns TRUE if this item is selected; otherwise returns FALSE.

       See also setSelected(), QListView::setSelected(), and QListView::selectionChanged().

       Example: listviews/listviews.cpp.

bool QListViewItem::isVisible () const
       Returns TRUE if the item is visible; otherwise returns FALSE.

       See also setVisible().

QListViewItem * QListViewItem::itemAbove ()
       Returns a pointer to the item immediately above this item on the screen. This is usually
       the item's closest older sibling, but it may also be its parent or its next older
       sibling's youngest child, or something else if anyoftheabove->height() returns 0. Returns
       0 if there is no item immediately above this item.

       This function assumes that all parents of this item are open (i.e. that this item is
       visible, or can be made visible by scrolling).

       This function might be relatively slow because of the tree traversions needed to find the
       correct item.

       See also itemBelow() and QListView::itemRect().

QListViewItem * QListViewItem::itemBelow ()
       Returns a pointer to the item immediately below this item on the screen. This is usually
       the item's eldest child, but it may also be its next younger sibling, its parent's next
       younger sibling, grandparent's, etc., or something else if anyoftheabove->height() returns
       0. Returns 0 if there is no item immediately below this item.

       This function assumes that all parents of this item are open (i.e. that this item is
       visible or can be made visible by scrolling).

       See also itemAbove() and QListView::itemRect().

       Example: dirview/dirview.cpp.

int QListViewItem::itemPos () const
       Returns the y coordinate of this item in the list view's coordinate system. This function
       is normally much slower than QListView::itemAt(), but it works for all items whereas
       QListView::itemAt() normally only works for items on the screen.

       See also QListView::itemAt(), QListView::itemRect(), and QListView::itemPos().

QString QListViewItem::key ( int column, bool ascending ) const [virtual]
       Returns a key that can be used for sorting by column column. The default implementation
       returns text(). Derived classes may also incorporate the order indicated by ascending into
       this key, although this is not recommended.

       If you want to sort on non-alphabetical data, e.g. dates, numbers, etc., it is more
       efficient to reimplement compare().

       See also compare() and sortChildItems().

QListView * QListViewItem::listView () const
       Returns a pointer to the list view containing this item.

       Note that this function traverses the items to the root to find the listview. This
       function will return 0 for taken items - see QListViewItem::takeItem()

void QListViewItem::moveItem ( QListViewItem * after )
       Move the item to be after item after, which must be one of the item's siblings. To move an
       item in the hierarchy, use takeItem() and insertItem().

       Note that this function will have no effect if sorting is enabled in the list view.

bool QListViewItem::multiLinesEnabled () const
       Returns TRUE if the item can display multiple lines of text in its columns; otherwise
       returns FALSE.

QListViewItem * QListViewItem::nextSibling () const
       Returns the sibling item below this item, or 0 if there is no sibling item after this
       item.

       Note that the siblings are not guaranteed to be sorted properly. QListView and
       QListViewItem try to postpone or avoid sorting to the greatest degree possible, in order
       to keep the user interface snappy.

       See also firstChild() and sortChildItems().

       Example: xml/tagreader-with-features/structureparser.cpp.

void QListViewItem::okRename ( int col ) [virtual protected]
       This function is called if the user presses Enter during in-place renaming of the item in
       column col.

       See also cancelRename().

void QListViewItem::paintBranches ( QPainter * p, const QColorGroup & cg, int w, int y, int h )
       [virtual]
       Paints a set of branches from this item to (some of) its children.

       Painter p is set up with clipping and translation so that you can only draw in the
       rectangle that needs redrawing; cg is the color group to use; the update rectangle is at
       (0, 0) and has size width w by height h. The top of the rectangle you own is at y (which
       is never greater than 0 but can be outside the window system's allowed coordinate range).

       The update rectangle is in an undefined state when this function is called; this function
       must draw on all of the pixels.

       See also paintCell() and QListView::drawContentsOffset().

void QListViewItem::paintCell ( QPainter * p, const QColorGroup & cg, int column, int width, int
       align ) [virtual]
       This virtual function paints the contents of one column of an item and aligns it as
       described by align.

       p is a QPainter open on the relevant paint device. p is translated so (0, 0) is the top-
       left pixel in the cell and width-1, height()-1 is the bottom-right pixel in the cell. The
       other properties of p (pen, brush, etc) are undefined. cg is the color group to use.
       column is the logical column number within the item that is to be painted; 0 is the column
       which may contain a tree.

       This function may use QListView::itemMargin() for readability spacing on the left and
       right sides of data such as text, and should honor isSelected() and
       QListView::allColumnsShowFocus().

       If you reimplement this function, you should also reimplement width().

       The rectangle to be painted is in an undefined state when this function is called, so you
       must draw on all the pixels. The painter p has the right font on entry.

       See also paintBranches() and QListView::drawContentsOffset().

       Example: listviews/listviews.cpp.

       Reimplemented in QCheckListItem.

void QListViewItem::paintFocus ( QPainter * p, const QColorGroup & cg, const QRect & r )
       [virtual]
       Paints a focus indicator on the rectangle r using painter p and colors cg.

       p is already clipped.

       See also paintCell(), paintBranches(), and QListView::allColumnsShowFocus.

       Reimplemented in QCheckListItem.

QListViewItem * QListViewItem::parent () const
       Returns the parent of this item, or 0 if this item has no parent.

       See also firstChild() and nextSibling().

       Examples:

const QPixmap * QListViewItem::pixmap ( int column ) const [virtual]
       Returns the pixmap for column, or 0 if there is no pixmap for column.

       See also setText() and setPixmap().

       Example: dirview/dirview.cpp.

void QListViewItem::removeItem ( QListViewItem * item ) [virtual]
       This function is obsolete. It is provided to keep old source working. We strongly advise
       against using it in new code.

       This function has been renamed takeItem().

bool QListViewItem::renameEnabled ( int col ) const
       Returns TRUE if this item can be in-place renamed in column col; otherwise returns FALSE.

void QListViewItem::repaint () const
       Repaints this item on the screen if it is currently visible.

       Example: addressbook/centralwidget.cpp.

int QListViewItem::rtti () const [virtual]
       Returns 0.

       Make your derived classes return their own values for rtti(), so that you can distinguish
       between different kinds of list view items. You should use values greater than 1000 to
       allow for extensions to this class.

       Reimplemented in QCheckListItem.

void QListViewItem::setDragEnabled ( bool allow ) [virtual]
       If allow is TRUE, the list view starts a drag (see QListView::dragObject()) when the user
       presses and moves the mouse on this item.

void QListViewItem::setDropEnabled ( bool allow ) [virtual]
       If allow is TRUE, the list view accepts drops onto the item; otherwise drops are not
       allowed.

void QListViewItem::setEnabled ( bool b ) [virtual]
       If b is TRUE the item is enabled; otherwise it is disabled. Disabled items are drawn
       differently (e.g. grayed-out) and are not accessible by the user.

void QListViewItem::setExpandable ( bool enable ) [virtual]
       Sets this item to be expandable even if it has no children if enable is TRUE, and to be
       expandable only if it has children if enable is FALSE (the default).

       The dirview example uses this in the canonical fashion. It checks whether the directory is
       empty in setup() and calls setExpandable(TRUE) if not; in setOpen() it reads the contents
       of the directory and inserts items accordingly. This strategy means that dirview can
       display the entire file system without reading very much at startup.

       Note that root items are not expandable by the user unless QListView::setRootIsDecorated()
       is set to TRUE.

       See also setSelectable().

void QListViewItem::setHeight ( int height ) [virtual protected]
       Sets this item's height to height pixels. This implicitly changes totalHeight(), too.

       Note that a font change causes this height to be overwritten unless you reimplement
       setup().

       For best results in Windows style we suggest using an even number of pixels.

       See also height(), totalHeight(), and isOpen().

void QListViewItem::setMultiLinesEnabled ( bool b ) [virtual]
       If b is TRUE each of the item's columns may contain multiple lines of text; otherwise each
       of them may only contain a single line.

void QListViewItem::setOpen ( bool o ) [virtual]
       Opens or closes an item, i.e. shows or hides an item's children.

       If o is TRUE all child items are shown initially. The user can hide them by clicking the -
       icon to the left of the item. If o is FALSE, the children of this item are initially
       hidden. The user can show them by clicking the + icon to the left of the item.

       See also height(), totalHeight(), and isOpen().

       Examples:

void QListViewItem::setPixmap ( int column, const QPixmap & pm ) [virtual]
       Sets the pixmap in column column to pm, if pm is non-null and different from the current
       pixmap, and if column is non-negative.

       See also pixmap() and setText().

       Example: dirview/dirview.cpp.

void QListViewItem::setRenameEnabled ( int col, bool b ) [virtual]
       If b is TRUE, this item can be in-place renamed in the column col by the user; otherwise
       it cannot be renamed in-place.

void QListViewItem::setSelectable ( bool enable ) [virtual]
       Sets this item to be selectable if enable is TRUE (the default) or not to be selectable if
       enable is FALSE.

       The user is not able to select a non-selectable item using either the keyboard or the
       mouse. This also applies for the application programmer (e.g. setSelected() respects this
       value).

       See also isSelectable().

void QListViewItem::setSelected ( bool s ) [virtual]
       If s is TRUE this item is selected; otherwise it is deselected.

       This function does not maintain any invariants or repaint anything --
       QListView::setSelected() does that.

       See also height() and totalHeight().

       Example: addressbook/centralwidget.cpp.

void QListViewItem::setText ( int column, const QString & text ) [virtual]
       Sets the text in column column to text, if column is a valid column number and text is
       different from the existing text.

       If text() has been reimplemented, this function may be a no-op.

       See also text() and key().

       Examples:

void QListViewItem::setVisible ( bool b )
       If b is TRUE, the item is made visible; otherwise it is hidden.

       If the item is not visible, itemAbove() and itemBelow() will never return this item,
       although you still can reach it by using e.g. QListViewItemIterator.

void QListViewItem::setup () [virtual]
       This virtual function is called before the first time QListView needs to know the height
       or any other graphical attribute of this object, and whenever the font, GUI style, or
       colors of the list view change.

       The default calls widthChanged() and sets the item's height to the height of a single line
       of text in the list view's font. (If you use icons, multi-line text, etc., you will
       probably need to call setHeight() yourself or reimplement it.)

       Example: dirview/dirview.cpp.

void QListViewItem::sort () [virtual]
       Sorts all this item's child items using the current sorting configuration (sort column and
       direction).

       See also enforceSortOrder().

void QListViewItem::sortChildItems ( int column, bool ascending ) [virtual]
       Sorts this item's children using column column. This is done in ascending order if
       ascending is TRUE and in descending order if ascending is FALSE.

       Asks some of the children to sort their children. (QListView and QListViewItem ensure that
       all on-screen objects are properly sorted but may avoid or defer sorting other objects in
       order to be more responsive.)

       See also key() and compare().

void QListViewItem::startRename ( int col ) [virtual]
       If in-place renaming of this item is enabled (see renameEnabled()), this function starts
       renaming the item in column col, by creating and initializing an edit box.

void QListViewItem::takeItem ( QListViewItem * item ) [virtual]
       Removes item from this object's list of children and causes an update of the screen
       display. The item is not deleted. You should not normally need to call this function
       because QListViewItem::~QListViewItem() calls it.

       The normal way to delete an item is to use delete.

       If you need to move an item from one place in the hierarchy to another you can use
       takeItem() to remove the item from the list view and then insertItem() to put the item
       back in its new position.

       If a taken item is part of a selection in Single selection mode, it is unselected and
       selectionChanged() is emitted. If a taken item is part of a selection in Multi or Extended
       selection mode, it remains selected.

       Warning: This function leaves item and its children in a state where most member functions
       are unsafe. Only a few functions work correctly on an item in this state, most notably
       insertItem(). The functions that work on taken items are explicitly documented as such.

       See also QListViewItem::insertItem().

QString QListViewItem::text ( int column ) const [virtual]
       Returns the text in column column, or QString::null if there is no text in that column.

       See also key() and paintCell().

       Examples:

int QListViewItem::totalHeight () const
       Returns the total height of this object, including any visible children. This height is
       recomputed lazily and cached for as long as possible.

       Functions which can affect the total height are, setHeight() which is used to set an
       item's height, setOpen() to show or hide an item's children, and invalidateHeight() to
       invalidate the cached height.

       See also height().

int QListViewItem::width ( const QFontMetrics & fm, const QListView * lv, int c ) const [virtual]

       Returns the number of pixels of width required to draw column c of list view lv, using the
       metrics fm without cropping. The list view containing this item may use this information
       depending on the QListView::WidthMode settings for the column.

       The default implementation returns the width of the bounding rectangle of the text of
       column c.

       See also listView(), widthChanged(), QListView::setColumnWidthMode(), and
       QListView::itemMargin.

void QListViewItem::widthChanged ( int c = -1 ) const
       Call this function when the value of width() may have changed for column c. Normally, you
       should call this if text(c) changes. Passing -1 for c indicates that all columns may have
       changed. It is more efficient to pass -1 if two or more columns have changed than to call
       widthChanged() separately for each one.

       See also width().

SEE ALSO
       http://doc.trolltech.com/qlistviewitem.html http://www.trolltech.com/faq/tech.html

COPYRIGHT
       Copyright 1992-2007 Trolltech ASA, http://www.trolltech.com.  See the license file
       included in the distribution for a complete license statement.

AUTHOR
       Generated automatically from the source code.

BUGS
       If you find a bug in Qt, please report it as described in
       http://doc.trolltech.com/bughowto.html.	Good bug reports help us to help you. Thank you.

       The definitive Qt documentation is provided in HTML format; it is located at
       $QTDIR/doc/html and can be read using Qt Assistant or with a web browser. This man page is
       provided as a convenience for those users who prefer man pages, although this format is
       not officially supported by Trolltech.

       If you find errors in this manual page, please report them to qt-bugs@trolltech.com.
       Please include the name of the manual page (qlistviewitem.3qt) and the Qt version (3.3.8).

Trolltech AS				 2 February 2007		       QListViewItem(3qt)
Unix & Linux Commands & Man Pages : ©2000 - 2018 Unix and Linux Forums


All times are GMT -4. The time now is 09:42 AM.