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< td align = "right" valign = "center" > < img src = "logo32.png" align = "right" width = "64" height = "32" border = "0" > < / td > < / tr > < / table > < h1 align = center > TQListViewItem Class Reference< / h1 >
< p > The TQListViewItem class implements a list view item.
< a href = "#details" > More...< / a >
< p > < tt > #include < < a href = "qlistview-h.html" > ntqlistview.h< / a > > < / tt >
< p > Inherits < a href = "ntqt.html" > TQt< / a > .
< p > Inherited by < a href = "qchecklistitem.html" > TQCheckListItem< / a > .
< p > < a href = "qlistviewitem-members.html" > List of all member functions.< / a >
< h2 > Public Members< / h2 >
< ul >
< li class = fn > < a href = "#TQListViewItem" > < b > TQListViewItem< / b > < / a > ( TQListView * parent )< / li >
< li class = fn > < a href = "#TQListViewItem-2" > < b > TQListViewItem< / b > < / a > ( TQListViewItem * parent )< / li >
< li class = fn > < a href = "#TQListViewItem-3" > < b > TQListViewItem< / b > < / a > ( TQListView * parent, TQListViewItem * after )< / li >
< li class = fn > < a href = "#TQListViewItem-4" > < b > TQListViewItem< / b > < / a > ( TQListViewItem * parent, TQListViewItem * after )< / li >
< li class = fn > < a href = "#TQListViewItem-5" > < b > TQListViewItem< / b > < / a > ( TQListView * parent, TQString label1, TQString label2 = TQString::null, TQString label3 = TQString::null, TQString label4 = TQString::null, TQString label5 = TQString::null, TQString label6 = TQString::null, TQString label7 = TQString::null, TQString label8 = TQString::null )< / li >
< li class = fn > < a href = "#TQListViewItem-6" > < b > TQListViewItem< / b > < / a > ( TQListViewItem * parent, TQString label1, TQString label2 = TQString::null, TQString label3 = TQString::null, TQString label4 = TQString::null, TQString label5 = TQString::null, TQString label6 = TQString::null, TQString label7 = TQString::null, TQString label8 = TQString::null )< / li >
< li class = fn > < a href = "#TQListViewItem-7" > < b > TQListViewItem< / b > < / a > ( TQListView * parent, TQListViewItem * after, TQString label1, TQString label2 = TQString::null, TQString label3 = TQString::null, TQString label4 = TQString::null, TQString label5 = TQString::null, TQString label6 = TQString::null, TQString label7 = TQString::null, TQString label8 = TQString::null )< / li >
< li class = fn > < a href = "#TQListViewItem-8" > < b > TQListViewItem< / b > < / a > ( TQListViewItem * parent, TQListViewItem * after, TQString label1, TQString label2 = TQString::null, TQString label3 = TQString::null, TQString label4 = TQString::null, TQString label5 = TQString::null, TQString label6 = TQString::null, TQString label7 = TQString::null, TQString label8 = TQString::null )< / li >
< li class = fn > virtual < a href = "#~TQListViewItem" > < b > ~TQListViewItem< / b > < / a > ()< / li >
< li class = fn > virtual void < a href = "#insertItem" > < b > insertItem< / b > < / a > ( TQListViewItem * newChild )< / li >
< li class = fn > virtual void < a href = "#takeItem" > < b > takeItem< / b > < / a > ( TQListViewItem * item )< / li >
< li class = fn > virtual void removeItem ( TQListViewItem * item ) < em > (obsolete)< / em > < / li >
< li class = fn > int < a href = "#height" > < b > height< / b > < / a > () const< / li >
< li class = fn > virtual void < a href = "#invalidateHeight" > < b > invalidateHeight< / b > < / a > ()< / li >
< li class = fn > int < a href = "#totalHeight" > < b > totalHeight< / b > < / a > () const< / li >
< li class = fn > virtual int < a href = "#width" > < b > width< / b > < / a > ( const TQFontMetrics & fm, const TQListView * lv, int c ) const< / li >
< li class = fn > void < a href = "#widthChanged" > < b > widthChanged< / b > < / a > ( int c = -1 ) const< / li >
< li class = fn > int < a href = "#depth" > < b > depth< / b > < / a > () const< / li >
< li class = fn > virtual void < a href = "#setText" > < b > setText< / b > < / a > ( int column, const TQString & text )< / li >
< li class = fn > virtual TQString < a href = "#text" > < b > text< / b > < / a > ( int column ) const< / li >
< li class = fn > virtual void < a href = "#setPixmap" > < b > setPixmap< / b > < / a > ( int column, const TQPixmap & pm )< / li >
< li class = fn > virtual const TQPixmap * < a href = "#pixmap" > < b > pixmap< / b > < / a > ( int column ) const< / li >
< li class = fn > virtual TQString < a href = "#key" > < b > key< / b > < / a > ( int column, bool ascending ) const< / li >
< li class = fn > virtual int < a href = "#compare" > < b > compare< / b > < / a > ( TQListViewItem * i, int col, bool ascending ) const< / li >
< li class = fn > virtual void < a href = "#sortChildItems" > < b > sortChildItems< / b > < / a > ( int column, bool ascending )< / li >
< li class = fn > int < a href = "#childCount" > < b > childCount< / b > < / a > () const< / li >
< li class = fn > bool < a href = "#isOpen" > < b > isOpen< / b > < / a > () const< / li >
< li class = fn > virtual void < a href = "#setOpen" > < b > setOpen< / b > < / a > ( bool o )< / li >
< li class = fn > virtual void < a href = "#setup" > < b > setup< / b > < / a > ()< / li >
< li class = fn > virtual void < a href = "#setSelected" > < b > setSelected< / b > < / a > ( bool s )< / li >
< li class = fn > bool < a href = "#isSelected" > < b > isSelected< / b > < / a > () const< / li >
< li class = fn > virtual void < a href = "#paintCell" > < b > paintCell< / b > < / a > ( TQPainter * p, const TQColorGroup & cg, int column, int width, int align )< / li >
< li class = fn > virtual void < a href = "#paintBranches" > < b > paintBranches< / b > < / a > ( TQPainter * p, const TQColorGroup & cg, int w, int y, int h )< / li >
< li class = fn > virtual void < a href = "#paintFocus" > < b > paintFocus< / b > < / a > ( TQPainter * p, const TQColorGroup & cg, const TQRect & r )< / li >
< li class = fn > TQListViewItem * < a href = "#firstChild" > < b > firstChild< / b > < / a > () const< / li >
< li class = fn > TQListViewItem * < a href = "#nextSibling" > < b > nextSibling< / b > < / a > () const< / li >
< li class = fn > TQListViewItem * < a href = "#parent" > < b > parent< / b > < / a > () const< / li >
< li class = fn > TQListViewItem * < a href = "#itemAbove" > < b > itemAbove< / b > < / a > ()< / li >
< li class = fn > TQListViewItem * < a href = "#itemBelow" > < b > itemBelow< / b > < / a > ()< / li >
< li class = fn > int < a href = "#itemPos" > < b > itemPos< / b > < / a > () const< / li >
< li class = fn > TQListView * < a href = "#listView" > < b > listView< / b > < / a > () const< / li >
< li class = fn > virtual void < a href = "#setSelectable" > < b > setSelectable< / b > < / a > ( bool enable )< / li >
< li class = fn > bool < a href = "#isSelectable" > < b > isSelectable< / b > < / a > () const< / li >
< li class = fn > virtual void < a href = "#setExpandable" > < b > setExpandable< / b > < / a > ( bool enable )< / li >
< li class = fn > bool < a href = "#isExpandable" > < b > isExpandable< / b > < / a > () const< / li >
< li class = fn > void < a href = "#repaint" > < b > repaint< / b > < / a > () const< / li >
< li class = fn > virtual void < a href = "#sort" > < b > sort< / b > < / a > ()< / li >
< li class = fn > void < a href = "#moveItem" > < b > moveItem< / b > < / a > ( TQListViewItem * after )< / li >
< li class = fn > virtual void < a href = "#setDragEnabled" > < b > setDragEnabled< / b > < / a > ( bool allow )< / li >
< li class = fn > virtual void < a href = "#setDropEnabled" > < b > setDropEnabled< / b > < / a > ( bool allow )< / li >
< li class = fn > bool < a href = "#dragEnabled" > < b > dragEnabled< / b > < / a > () const< / li >
< li class = fn > bool < a href = "#dropEnabled" > < b > dropEnabled< / b > < / a > () const< / li >
< li class = fn > virtual bool < a href = "#acceptDrop" > < b > acceptDrop< / b > < / a > ( const TQMimeSource * mime ) const< / li >
< li class = fn > void < a href = "#setVisible" > < b > setVisible< / b > < / a > ( bool b )< / li >
< li class = fn > bool < a href = "#isVisible" > < b > isVisible< / b > < / a > () const< / li >
< li class = fn > virtual void < a href = "#setRenameEnabled" > < b > setRenameEnabled< / b > < / a > ( int col, bool b )< / li >
< li class = fn > bool < a href = "#renameEnabled" > < b > renameEnabled< / b > < / a > ( int col ) const< / li >
< li class = fn > virtual void < a href = "#startRename" > < b > startRename< / b > < / a > ( int col )< / li >
< li class = fn > virtual void < a href = "#setEnabled" > < b > setEnabled< / b > < / a > ( bool b )< / li >
< li class = fn > bool < a href = "#isEnabled" > < b > isEnabled< / b > < / a > () const< / li >
< li class = fn > virtual int < a href = "#rtti" > < b > rtti< / b > < / a > () const< / li >
< li class = fn > virtual void < a href = "#setMultiLinesEnabled" > < b > setMultiLinesEnabled< / b > < / a > ( bool b )< / li >
< li class = fn > bool < a href = "#multiLinesEnabled" > < b > multiLinesEnabled< / b > < / a > () const< / li >
< / ul >
< h2 > Protected Members< / h2 >
< ul >
< li class = fn > virtual void < a href = "#enforceSortOrder" > < b > enforceSortOrder< / b > < / a > () const< / li >
< li class = fn > virtual void < a href = "#setHeight" > < b > setHeight< / b > < / a > ( int height )< / li >
< li class = fn > virtual void < a href = "#activate" > < b > activate< / b > < / a > ()< / li >
< li class = fn > bool < a href = "#activatedPos" > < b > activatedPos< / b > < / a > ( TQPoint & pos )< / li >
< li class = fn > virtual void < a href = "#dropped" > < b > dropped< / b > < / a > ( TQDropEvent * e )< / li >
< li class = fn > virtual void < a href = "#dragEntered" > < b > dragEntered< / b > < / a > ()< / li >
< li class = fn > virtual void < a href = "#dragLeft" > < b > dragLeft< / b > < / a > ()< / li >
< li class = fn > virtual void < a href = "#okRename" > < b > okRename< / b > < / a > ( int col )< / li >
< li class = fn > virtual void < a href = "#cancelRename" > < b > cancelRename< / b > < / a > ( int col )< / li >
< / ul >
< hr > < a name = "details" > < / a > < h2 > Detailed Description< / h2 >
The TQListViewItem class implements a list view item.
< p >
< p > A list view item is a multi-column object capable of displaying
itself in a < a href = "ntqlistview.html" > TQListView< / a > .
< p > The easiest way to use TQListViewItem is to construct one with a
few constant strings, and either a TQListView or another
TQListViewItem as parent.
< pre >
(void) new TQListViewItem( listView, "Column 1", "Column 2" );
(void) new TQListViewItem( listView-> firstChild(), "A", "B", "C" );
< / pre >
We've discarded the pointers to the items since we can still access
them via their parent < em > listView< / em > . By default, TQListView sorts its
items; this can be switched off with < a href = "ntqlistview.html#setSorting" > TQListView::setSorting< / a > (-1).
< p > The parent must be another TQListViewItem or a TQListView. If the
parent is a TQListView, the item becomes a top-level item within
that TQListView. If the parent is another TQListViewItem, the item
becomes a child of that list view item.
< p > If you keep the pointer, you can set or change the texts using
< a href = "#setText" > setText< / a > (), add pixmaps using < a href = "#setPixmap" > setPixmap< / a > (), change its mode using
< a href = "#setSelectable" > setSelectable< / a > (), < a href = "#setSelected" > setSelected< / a > (), < a href = "#setOpen" > setOpen< / a > () and < a href = "#setExpandable" > setExpandable< / a > ().
You'll also be able to change its height using < a href = "#setHeight" > setHeight< / a > (), and
traverse its sub-items. You don't have to keep the pointer since
you can get a pointer to any TQListViewItem in a < a href = "ntqlistview.html" > TQListView< / a > using
< a href = "ntqlistview.html#selectedItem" > TQListView::selectedItem< / a > (), < a href = "ntqlistview.html#currentItem" > TQListView::currentItem< / a > (),
< a href = "ntqlistview.html#firstChild" > TQListView::firstChild< / a > (), < a href = "ntqlistview.html#lastItem" > TQListView::lastItem< / a > () and
< a href = "ntqlistview.html#findItem" > TQListView::findItem< / a > ().
< p > If you call < tt > delete< / tt > on a list view item, it will be deleted as
expected, and as usual for < a href = "tqobject.html" > TQObject< / a > s, if it has any child items
(to any depth), all these will be deleted too.
< p > < a href = "qchecklistitem.html" > TQCheckListItem< / a > s are list view items that have a checkbox or
radio button and can be used in place of plain TQListViewItems.
< p > You can traverse the tree as if it were a doubly-linked list using
< a href = "#itemAbove" > itemAbove< / a > () and < a href = "#itemBelow" > itemBelow< / a > (); 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).
< p > Here's how to traverse all of an item's children (but not its
children's children, etc.):
Example:
< pre >
TQListViewItem * myChild = myItem-> firstChild();
while( myChild ) {
doSomething( myChild );
myChild = myChild-> < a href = "#nextSibling" > nextSibling< / a > ();
}
< / pre >
< p > 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:
< p > < pre >
< a href = "qlistviewitemiterator.html" > TQListViewItemIterator< / a > it( listview );
while ( it.< a href = "qlistviewitemiterator.html#current" > current< / a > () ) {
TQListViewItem *item = it.< a href = "qlistviewitemiterator.html#current" > current< / a > ();
doSomething( item );
++it;
}
< / pre >
< p > 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 < a href = "#enforceSortOrder" > enforceSortOrder< / a > () at any time; < a href = "ntqlistview.html" > TQListView< / a > will
always call it before it needs to show an item.
< p > Many programs will need to reimplement TQListViewItem. The most
commonly reimplemented functions are:
< center > < table cellpadding = "4" cellspacing = "2" border = "0" >
< tr bgcolor = "#a2c511" > < th valign = "top" > Function < th valign = "top" > Description
< tr bgcolor = "#f0f0f0" > < td valign = "top" > < a href = "#text" > text< / a > ()
< td valign = "top" > Returns the text in a column. Many subclasses will compute
this on the fly.
< tr bgcolor = "#d0d0d0" > < td valign = "top" > < a href = "#key" > key< / a > ()
< td valign = "top" > Used for sorting. The default < a href = "#key" > key< / a > () simply calls
< a href = "#text" > text< / a > (), but judicious use of key() can give you fine
control over sorting; for example, < a href = "tqfiledialog.html" > TQFileDialog< / a >
reimplements key() to sort by date.
< tr bgcolor = "#f0f0f0" > < td valign = "top" > < a href = "#setup" > setup< / a > ()
< td valign = "top" > Called before showing the item and whenever the list
view's font changes, for example.
< tr bgcolor = "#d0d0d0" > < td valign = "top" > < a href = "#activate" > activate< / a > ()
< td valign = "top" > Called whenever the user clicks on the item or presses
Space when the item is the current item.
< / table > < / center >
< p > Some subclasses call < a href = "#setExpandable" > setExpandable< / a > (TRUE) even when they have no
children, and populate themselves when < a href = "#setup" > setup< / a > () or < a href = "#setOpen" > setOpen< / a > (TRUE) is
called. The < a href = "dirview-example.html" > dirview/dirview.cpp< / a > 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.
< p > < center > < img src = "qlistviewitems.png" alt = "List View Items" > < / center >
< p > < p > See also < a href = "qchecklistitem.html" > TQCheckListItem< / a > , < a href = "ntqlistview.html" > TQListView< / a > , and < a href = "advanced.html" > Advanced Widgets< / a > .
< hr > < h2 > Member Function Documentation< / h2 >
< h3 class = fn > < a name = "TQListViewItem" > < / a > TQListViewItem::TQListViewItem ( < a href = "ntqlistview.html" > TQListView< / a > * parent )
< / h3 >
Constructs a new top-level list view item in the < a href = "ntqlistview.html" > TQListView< / a > < em > parent< / em > .
< h3 class = fn > < a name = "TQListViewItem-2" > < / a > TQListViewItem::TQListViewItem ( < a href = "qlistviewitem.html" > TQListViewItem< / a > * parent )
< / h3 >
Constructs a new list view item that is a child of < em > parent< / em > and
first in the parent's list of children.
< h3 class = fn > < a name = "TQListViewItem-3" > < / a > TQListViewItem::TQListViewItem ( < a href = "ntqlistview.html" > TQListView< / a > * parent, < a href = "qlistviewitem.html" > TQListViewItem< / a > * after )
< / h3 >
Constructs an empty list view item that is a child of < em > parent< / em >
and is after item < em > after< / em > in the parent's list of children. Since
< em > parent< / em > is a < a href = "ntqlistview.html" > TQListView< / a > the item will be a top-level item.
< h3 class = fn > < a name = "TQListViewItem-4" > < / a > TQListViewItem::TQListViewItem ( < a href = "qlistviewitem.html" > TQListViewItem< / a > * parent, < a href = "qlistviewitem.html" > TQListViewItem< / a > * after )
< / h3 >
Constructs an empty list view item that is a child of < em > parent< / em >
and is after item < em > after< / em > in the parent's list of children.
< h3 class = fn > < a name = "TQListViewItem-5" > < / a > TQListViewItem::TQListViewItem ( < a href = "ntqlistview.html" > TQListView< / a > * parent, < a href = "tqstring.html" > TQString< / a > label1, < a href = "tqstring.html" > TQString< / a > label2 = TQString::null, < a href = "tqstring.html" > TQString< / a > label3 = TQString::null, < a href = "tqstring.html" > TQString< / a > label4 = TQString::null, < a href = "tqstring.html" > TQString< / a > label5 = TQString::null, < a href = "tqstring.html" > TQString< / a > label6 = TQString::null, < a href = "tqstring.html" > TQString< / a > label7 = TQString::null, < a href = "tqstring.html" > TQString< / a > label8 = TQString::null )
< / h3 >
Constructs a new top-level list view item in the < a href = "ntqlistview.html" > TQListView< / a > < em > parent< / em > , with up to eight constant strings, < em > label1< / em > , < em > label2< / em > , < em > label3< / em > , < em > label4< / em > , < em > label5< / em > , < em > label6< / em > , < em > label7< / em > and < em > label8< / em >
defining its columns' contents.
< p > < p > See also < a href = "#setText" > setText< / a > ().
< h3 class = fn > < a name = "TQListViewItem-6" > < / a > TQListViewItem::TQListViewItem ( < a href = "qlistviewitem.html" > TQListViewItem< / a > * parent, < a href = "tqstring.html" > TQString< / a > label1, < a href = "tqstring.html" > TQString< / a > label2 = TQString::null, < a href = "tqstring.html" > TQString< / a > label3 = TQString::null, < a href = "tqstring.html" > TQString< / a > label4 = TQString::null, < a href = "tqstring.html" > TQString< / a > label5 = TQString::null, < a href = "tqstring.html" > TQString< / a > label6 = TQString::null, < a href = "tqstring.html" > TQString< / a > label7 = TQString::null, < a href = "tqstring.html" > TQString< / a > label8 = TQString::null )
< / h3 >
Constructs a new list view item as a child of the TQListViewItem < em > parent< / em > with up to eight constant strings, < em > label1< / em > , < em > label2< / em > , < em > label3< / em > , < em > label4< / em > , < em > label5< / em > , < em > label6< / em > , < em > label7< / em > and < em > label8< / em >
as columns' contents.
< p > < p > See also < a href = "#setText" > setText< / a > ().
< h3 class = fn > < a name = "TQListViewItem-7" > < / a > TQListViewItem::TQListViewItem ( < a href = "ntqlistview.html" > TQListView< / a > * parent, < a href = "qlistviewitem.html" > TQListViewItem< / a > * after, < a href = "tqstring.html" > TQString< / a > label1, < a href = "tqstring.html" > TQString< / a > label2 = TQString::null, < a href = "tqstring.html" > TQString< / a > label3 = TQString::null, < a href = "tqstring.html" > TQString< / a > label4 = TQString::null, < a href = "tqstring.html" > TQString< / a > label5 = TQString::null, < a href = "tqstring.html" > TQString< / a > label6 = TQString::null, < a href = "tqstring.html" > TQString< / a > label7 = TQString::null, < a href = "tqstring.html" > TQString< / a > label8 = TQString::null )
< / h3 >
Constructs a new list view item in the < a href = "ntqlistview.html" > TQListView< / a > < em > parent< / em > that is
included after item < em > after< / em > and that has up to eight column
texts, < em > label1< / em > , < em > label2< / em > , < em > label3< / em > , < em > label4< / em > , < em > label5< / em > , < em > label6< / em > , < em > label7< / em > and< em > label8< / em > .
< p > Note that the order is changed according to < a href = "#key" > TQListViewItem::key< / a > ()
unless the list view's sorting is disabled using
< a href = "ntqlistview.html#setSorting" > TQListView::setSorting< / a > (-1).
< p > < p > See also < a href = "#setText" > setText< / a > ().
< h3 class = fn > < a name = "TQListViewItem-8" > < / a > TQListViewItem::TQListViewItem ( < a href = "qlistviewitem.html" > TQListViewItem< / a > * parent, < a href = "qlistviewitem.html" > TQListViewItem< / a > * after, < a href = "tqstring.html" > TQString< / a > label1, < a href = "tqstring.html" > TQString< / a > label2 = TQString::null, < a href = "tqstring.html" > TQString< / a > label3 = TQString::null, < a href = "tqstring.html" > TQString< / a > label4 = TQString::null, < a href = "tqstring.html" > TQString< / a > label5 = TQString::null, < a href = "tqstring.html" > TQString< / a > label6 = TQString::null, < a href = "tqstring.html" > TQString< / a > label7 = TQString::null, < a href = "tqstring.html" > TQString< / a > label8 = TQString::null )
< / h3 >
Constructs a new list view item as a child of the TQListViewItem < em > parent< / em > . It is inserted after item < em > after< / em > and may contain up to
eight strings, < em > label1< / em > , < em > label2< / em > , < em > label3< / em > , < em > label4< / em > , < em > label5< / em > , < em > label6< / em > , < em > label7< / em > and < em > label8< / em > as column entries.
< p > Note that the order is changed according to < a href = "#key" > TQListViewItem::key< / a > ()
unless the list view's sorting is disabled using
< a href = "ntqlistview.html#setSorting" > TQListView::setSorting< / a > (-1).
< p > < p > See also < a href = "#setText" > setText< / a > ().
< h3 class = fn > < a name = "~TQListViewItem" > < / a > TQListViewItem::~TQListViewItem ()< tt > [virtual]< / tt >
< / h3 >
Destroys the item, deleting all its children and freeing up all
allocated resources.
< h3 class = fn > bool < a name = "acceptDrop" > < / a > TQListViewItem::acceptDrop ( const < a href = "tqmimesource.html" > TQMimeSource< / a > * mime ) const< tt > [virtual]< / tt >
< / h3 >
Returns TRUE if the item can accept drops of type < a href = "tqmimesource.html" > TQMimeSource< / a > < em > mime< / em > ; otherwise returns FALSE.
< p > The default implementation does nothing and returns FALSE. A
subclass must reimplement this to accept drops.
< h3 class = fn > void < a name = "activate" > < / a > TQListViewItem::activate ()< tt > [virtual protected]< / tt >
< / h3 >
This virtual function is called whenever the user presses the mouse
on this item or presses Space on it.
< p > < p > See also < a href = "#activatedPos" > activatedPos< / a > ().
< p > Reimplemented in < a href = "qchecklistitem.html#activate" > TQCheckListItem< / a > .
< h3 class = fn > bool < a name = "activatedPos" > < / a > TQListViewItem::activatedPos ( < a href = "tqpoint.html" > TQPoint< / a > & pos )< tt > [protected]< / tt >
< / h3 >
When called from a reimplementation of < a href = "#activate" > activate< / a > (), this function
gives information on how the item was activated. Otherwise the
behavior is undefined.
< p > If activate() was caused by a mouse press, the function sets < em > pos< / em > to where the user clicked and returns TRUE; otherwise it
returns FALSE and does not change < em > pos< / em > .
< p > < em > pos< / em > is relative to the top-left corner of this item.
< p > < b > Warning:< / b > We recommend that you ignore this function; it is
scheduled to become obsolete.
< p > < p > See also < a href = "#activate" > activate< / a > ().
< h3 class = fn > void < a name = "cancelRename" > < / a > TQListViewItem::cancelRename ( int col )< tt > [virtual protected]< / tt >
< / h3 >
This function is called if the user cancels in-place renaming of
this item in column < em > col< / em > (e.g. by pressing Esc).
< p > < p > See also < a href = "#okRename" > okRename< / a > ().
< h3 class = fn > int < a name = "childCount" > < / a > TQListViewItem::childCount () const
< / h3 >
< p > Returns how many children this item has. The count only includes
the item's immediate children.
< h3 class = fn > int < a name = "compare" > < / a > TQListViewItem::compare ( < a href = "qlistviewitem.html" > TQListViewItem< / a > * i, int col, bool ascending ) const< tt > [virtual]< / tt >
< / h3 >
Compares this list view item to < em > i< / em > using the column < em > col< / em > in < em > ascending< / em > order. Returns < 0 if this item is less than < em > i< / em > , 0 if
they are equal and > 0 if this item is greater than < em > i< / em > .
< p > This function is used for sorting.
< p > The default implementation compares the item keys (< a href = "#key" > key< / a > ()) using
< a href = "tqstring.html#localeAwareCompare" > TQString::localeAwareCompare< / a > (). A reimplementation can use
different values and a different comparison function. Here is a
reimplementation that uses plain Unicode comparison:
< p > < pre >
int MyListViewItem::compare( TQListViewItem *i, int col,
bool ascending ) const
{
return key( col, ascending ).compare( i-> < a href = "#key" > key< / a > ( col, ascending) );
}
< / pre >
We don't recommend using < em > ascending< / em > so your code can safely
ignore it.
< p > < p > See also < a href = "#key" > key< / a > (), < a href = "tqstring.html#localeAwareCompare" > TQString::localeAwareCompare< / a > (), and < a href = "tqstring.html#compare" > TQString::compare< / a > ().
< h3 class = fn > int < a name = "depth" > < / a > TQListViewItem::depth () const
< / h3 >
Returns the depth of this item.
< p > Example: < a href = "dirview-example.html#x1686" > dirview/dirview.cpp< / a > .
< h3 class = fn > bool < a name = "dragEnabled" > < / a > TQListViewItem::dragEnabled () const
< / h3 >
Returns TRUE if this item can be dragged; otherwise returns FALSE.
< p > < p > See also < a href = "#setDragEnabled" > setDragEnabled< / a > ().
< h3 class = fn > void < a name = "dragEntered" > < / a > TQListViewItem::dragEntered ()< tt > [virtual protected]< / tt >
< / h3 >
This function is called when a drag enters the item's bounding
rectangle.
< p > The default implementation does nothing, subclasses may need to
reimplement this function.
< h3 class = fn > void < a name = "dragLeft" > < / a > TQListViewItem::dragLeft ()< tt > [virtual protected]< / tt >
< / h3 >
This function is called when a drag leaves the item's bounding
rectangle.
< p > The default implementation does nothing, subclasses may need to
reimplement this function.
< h3 class = fn > bool < a name = "dropEnabled" > < / a > TQListViewItem::dropEnabled () const
< / h3 >
Returns TRUE if this item accepts drops; otherwise returns FALSE.
< p > < p > See also < a href = "#setDropEnabled" > setDropEnabled< / a > () and < a href = "#acceptDrop" > acceptDrop< / a > ().
< h3 class = fn > void < a name = "dropped" > < / a > TQListViewItem::dropped ( < a href = "tqdropevent.html" > TQDropEvent< / a > * e )< tt > [virtual protected]< / tt >
< / h3 >
This function is called when something was dropped on the item. < em > e< / em >
contains all the information about the drop.
< p > The default implementation does nothing, subclasses may need to
reimplement this function.
< h3 class = fn > void < a name = "enforceSortOrder" > < / a > TQListViewItem::enforceSortOrder () const< tt > [virtual protected]< / tt >
< / h3 >
Makes sure that this object's children are sorted appropriately.
< p > This only works if every item from the root item down to this item
is already sorted.
< p > < p > See also < a href = "#sortChildItems" > sortChildItems< / a > ().
< h3 class = fn > < a href = "qlistviewitem.html" > TQListViewItem< / a > * < a name = "firstChild" > < / a > TQListViewItem::firstChild () const
< / h3 >
Returns the first (top) child of this item, or 0 if this item has
no children.
< p > Note that the children are not guaranteed to be sorted properly.
< a href = "ntqlistview.html" > TQListView< / a > and TQListViewItem try to postpone or avoid sorting to
the greatest degree possible, in order to keep the user interface
snappy.
< p > < p > See also < a href = "#nextSibling" > nextSibling< / a > () and < a href = "#sortChildItems" > sortChildItems< / a > ().
< p > Example: < a href = "checklists-example.html#x430" > checklists/checklists.cpp< / a > .
< h3 class = fn > int < a name = "height" > < / a > TQListViewItem::height () const
< / h3 >
Returns the height of this item in pixels. This does not include
the height of any children; < a href = "#totalHeight" > totalHeight< / a > () returns that.
< h3 class = fn > void < a name = "insertItem" > < / a > TQListViewItem::insertItem ( < a href = "qlistviewitem.html" > TQListViewItem< / a > * newChild )< tt > [virtual]< / tt >
< / h3 >
Inserts < em > newChild< / em > 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 < em > newChild< / em > .
< p > < b > Warning:< / b > If you are using < tt > Single< / tt > selection mode, then you
should only insert unselected items.
< h3 class = fn > void < a name = "invalidateHeight" > < / a > TQListViewItem::invalidateHeight ()< tt > [virtual]< / tt >
< / h3 >
Invalidates the cached total height of this item, including all
open children.
< p > < p > See also < a href = "#setHeight" > setHeight< / a > (), < a href = "#height" > height< / a > (), and < a href = "#totalHeight" > totalHeight< / a > ().
< h3 class = fn > bool < a name = "isEnabled" > < / a > TQListViewItem::isEnabled () const
< / h3 >
Returns TRUE if this item is enabled; otherwise returns FALSE.
< p > < p > See also < a href = "#setEnabled" > setEnabled< / a > ().
< h3 class = fn > bool < a name = "isExpandable" > < / a > TQListViewItem::isExpandable () const
< / h3 >
< p > Returns TRUE if this item is expandable even when it has no
children; otherwise returns FALSE.
< h3 class = fn > bool < a name = "isOpen" > < / a > TQListViewItem::isOpen () const
< / h3 >
< p > Returns TRUE if this list view item has children < em > and< / em > they are
not explicitly hidden; otherwise returns FALSE.
< p > < p > See also < a href = "#setOpen" > setOpen< / a > ().
< h3 class = fn > bool < a name = "isSelectable" > < / a > TQListViewItem::isSelectable () const
< / h3 >
< p > Returns TRUE if the item is selectable (as it is by default);
otherwise returns FALSE
< p > < p > See also < a href = "#setSelectable" > setSelectable< / a > ().
< h3 class = fn > bool < a name = "isSelected" > < / a > TQListViewItem::isSelected () const
< / h3 >
< p > Returns TRUE if this item is selected; otherwise returns FALSE.
< p > < p > See also < a href = "#setSelected" > setSelected< / a > (), < a href = "ntqlistview.html#setSelected" > TQListView::setSelected< / a > (), and < a href = "ntqlistview.html#selectionChanged" > TQListView::selectionChanged< / a > ().
< p > Example: < a href = "listviews-example.html#x156" > listviews/listviews.cpp< / a > .
< h3 class = fn > bool < a name = "isVisible" > < / a > TQListViewItem::isVisible () const
< / h3 >
Returns TRUE if the item is visible; otherwise returns FALSE.
< p > < p > See also < a href = "#setVisible" > setVisible< / a > ().
< h3 class = fn > < a href = "qlistviewitem.html" > TQListViewItem< / a > * < a name = "itemAbove" > < / a > TQListViewItem::itemAbove ()
< / h3 >
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.
< p > 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).
< p > This function might be relatively slow because of the tree
traversions needed to find the correct item.
< p > < p > See also < a href = "#itemBelow" > itemBelow< / a > () and < a href = "ntqlistview.html#itemRect" > TQListView::itemRect< / a > ().
< h3 class = fn > < a href = "qlistviewitem.html" > TQListViewItem< / a > * < a name = "itemBelow" > < / a > TQListViewItem::itemBelow ()
< / h3 >
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.
< p > 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).
< p > < p > See also < a href = "#itemAbove" > itemAbove< / a > () and < a href = "ntqlistview.html#itemRect" > TQListView::itemRect< / a > ().
< p > Example: < a href = "dirview-example.html#x1687" > dirview/dirview.cpp< / a > .
< h3 class = fn > int < a name = "itemPos" > < / a > TQListViewItem::itemPos () const
< / h3 >
Returns the y coordinate of this item in the list view's
coordinate system. This function is normally much slower than
< a href = "ntqlistview.html#itemAt" > TQListView::itemAt< / a > (), but it works for all items whereas
TQListView::itemAt() normally only works for items on the screen.
< p > < p > See also < a href = "ntqlistview.html#itemAt" > TQListView::itemAt< / a > (), < a href = "ntqlistview.html#itemRect" > TQListView::itemRect< / a > (), and < a href = "ntqlistview.html#itemPos" > TQListView::itemPos< / a > ().
< h3 class = fn > < a href = "tqstring.html" > TQString< / a > < a name = "key" > < / a > TQListViewItem::key ( int column, bool ascending ) const< tt > [virtual]< / tt >
< / h3 >
< p > Returns a key that can be used for sorting by column < em > column< / em > .
The default implementation returns < a href = "#text" > text< / a > (). Derived classes may
also incorporate the order indicated by < em > ascending< / em > into this
key, although this is not recommended.
< p > If you want to sort on non-alphabetical data, e.g. dates, numbers,
etc., it is more efficient to reimplement < a href = "#compare" > compare< / a > ().
< p > < p > See also < a href = "#compare" > compare< / a > () and < a href = "#sortChildItems" > sortChildItems< / a > ().
< h3 class = fn > < a href = "ntqlistview.html" > TQListView< / a > * < a name = "listView" > < / a > TQListViewItem::listView () const
< / h3 >
Returns a pointer to the list view containing this item.
< p > Note that this function traverses the items to the root to find the
listview. This function will return 0 for taken items - see
< a href = "#takeItem" > TQListViewItem::takeItem< / a > ()
< h3 class = fn > void < a name = "moveItem" > < / a > TQListViewItem::moveItem ( < a href = "qlistviewitem.html" > TQListViewItem< / a > * after )
< / h3 >
Move the item to be after item < em > after< / em > , which must be one of the
item's siblings. To move an item in the hierarchy, use < a href = "#takeItem" > takeItem< / a > ()
and < a href = "#insertItem" > insertItem< / a > ().
< p > Note that this function will have no effect if sorting is enabled
in the list view.
< h3 class = fn > bool < a name = "multiLinesEnabled" > < / a > TQListViewItem::multiLinesEnabled () const
< / h3 >
Returns TRUE if the item can display multiple lines of text in its
columns; otherwise returns FALSE.
< h3 class = fn > < a href = "qlistviewitem.html" > TQListViewItem< / a > * < a name = "nextSibling" > < / a > TQListViewItem::nextSibling () const
< / h3 >
< p > Returns the sibling item below this item, or 0 if there is no
sibling item after this item.
< p > Note that the siblings are not guaranteed to be sorted properly.
< a href = "ntqlistview.html" > TQListView< / a > and TQListViewItem try to postpone or avoid sorting to
the greatest degree possible, in order to keep the user interface
snappy.
< p > < p > See also < a href = "#firstChild" > firstChild< / a > () and < a href = "#sortChildItems" > sortChildItems< / a > ().
< p > Example: < a href = "tagreader-with-features-example.html#x1965" > xml/tagreader-with-features/structureparser.cpp< / a > .
< h3 class = fn > void < a name = "okRename" > < / a > TQListViewItem::okRename ( int col )< tt > [virtual protected]< / tt >
< / h3 >
This function is called if the user presses Enter during in-place
renaming of the item in column < em > col< / em > .
< p > < p > See also < a href = "#cancelRename" > cancelRename< / a > ().
< h3 class = fn > void < a name = "paintBranches" > < / a > TQListViewItem::paintBranches ( < a href = "tqpainter.html" > TQPainter< / a > * p, const < a href = "tqcolorgroup.html" > TQColorGroup< / a > & cg, int w, int y, int h )< tt > [virtual]< / tt >
< / h3 >
Paints a set of branches from this item to (some of) its children.
< p > Painter < em > p< / em > is set up with clipping and translation so that you
can only draw in the rectangle that needs redrawing; < em > cg< / em > is the
color group to use; the update rectangle is at (0, 0) and has size
width < em > w< / em > by height < em > h< / em > . The top of the rectangle you own is at
< em > y< / em > (which is never greater than 0 but can be outside the window
system's allowed coordinate range).
< p > The update rectangle is in an undefined state when this function
is called; this function must draw on < em > all< / em > of the pixels.
< p > < p > See also < a href = "#paintCell" > paintCell< / a > () and < a href = "ntqlistview.html#drawContentsOffset" > TQListView::drawContentsOffset< / a > ().
< h3 class = fn > void < a name = "paintCell" > < / a > TQListViewItem::paintCell ( < a href = "tqpainter.html" > TQPainter< / a > * p, const < a href = "tqcolorgroup.html" > TQColorGroup< / a > & cg, int column, int width, int align )< tt > [virtual]< / tt >
< / h3 >
This virtual function paints the contents of one column of an item
and aligns it as described by < em > align< / em > .
< p > < em > p< / em > is a < a href = "tqpainter.html" > TQPainter< / a > open on the relevant paint device. < em > p< / em > is
translated so (0, 0) is the top-left pixel in the cell and < em > width-1< / em > , < a href = "#height" > height< / a > ()-1 is the bottom-right pixel < em > in< / em > the cell. The
other properties of < em > p< / em > (pen, brush, etc) are undefined. < em > cg< / em > is
the color group to use. < em > column< / em > is the logical column number
within the item that is to be painted; 0 is the column which may
contain a tree.
< p > This function may use < a href = "ntqlistview.html#itemMargin" > TQListView::itemMargin< / a > () for readability
spacing on the left and right sides of data such as text, and
should honor < a href = "#isSelected" > isSelected< / a > () and < a href = "ntqlistview.html#allColumnsShowFocus" > TQListView::allColumnsShowFocus< / a > ().
< p > If you reimplement this function, you should also reimplement
< a href = "#width" > width< / a > ().
< p > The rectangle to be painted is in an undefined state when this
function is called, so you < em > must< / em > draw on all the pixels. The
painter < em > p< / em > has the right font on entry.
< p > < p > See also < a href = "#paintBranches" > paintBranches< / a > () and < a href = "ntqlistview.html#drawContentsOffset" > TQListView::drawContentsOffset< / a > ().
< p > Example: < a href = "listviews-example.html#x157" > listviews/listviews.cpp< / a > .
< p > Reimplemented in < a href = "qchecklistitem.html#paintCell" > TQCheckListItem< / a > .
< h3 class = fn > void < a name = "paintFocus" > < / a > TQListViewItem::paintFocus ( < a href = "tqpainter.html" > TQPainter< / a > * p, const < a href = "tqcolorgroup.html" > TQColorGroup< / a > & cg, const < a href = "tqrect.html" > TQRect< / a > & r )< tt > [virtual]< / tt >
< / h3 >
Paints a focus indicator on the rectangle < em > r< / em > using painter < em > p< / em >
and colors < em > cg< / em > .
< p > < em > p< / em > is already clipped.
< p > < p > See also < a href = "#paintCell" > paintCell< / a > (), < a href = "#paintBranches" > paintBranches< / a > (), and < a href = "ntqlistview.html#allColumnsShowFocus-prop" > TQListView::allColumnsShowFocus< / a > .
< p > Reimplemented in < a href = "qchecklistitem.html#paintFocus" > TQCheckListItem< / a > .
< h3 class = fn > < a href = "qlistviewitem.html" > TQListViewItem< / a > * < a name = "parent" > < / a > TQListViewItem::parent () const
< / h3 >
Returns the parent of this item, or 0 if this item has no parent.
< p > < p > See also < a href = "#firstChild" > firstChild< / a > () and < a href = "#nextSibling" > nextSibling< / a > ().
< p > Examples: < a href = "dirview-example.html#x1688" > dirview/dirview.cpp< / a > .
< h3 class = fn > const < a href = "tqpixmap.html" > TQPixmap< / a > * < a name = "pixmap" > < / a > TQListViewItem::pixmap ( int column ) const< tt > [virtual]< / tt >
< / h3 >
Returns the pixmap for < em > column< / em > , or 0 if there is no pixmap for
< em > column< / em > .
< p > < p > See also < a href = "#setText" > setText< / a > () and < a href = "#setPixmap" > setPixmap< / a > ().
< p > Example: < a href = "dirview-example.html#x1689" > dirview/dirview.cpp< / a > .
< h3 class = fn > void < a name = "removeItem" > < / a > TQListViewItem::removeItem ( < a href = "qlistviewitem.html" > TQListViewItem< / a > * item )< tt > [virtual]< / tt >
< / h3 >
< b > This function is obsolete.< / b > It is provided to keep old source working. We strongly advise against using it in new code.
< p > This function has been renamed < a href = "#takeItem" > takeItem< / a > ().
< h3 class = fn > bool < a name = "renameEnabled" > < / a > TQListViewItem::renameEnabled ( int col ) const
< / h3 >
Returns TRUE if this item can be in-place renamed in column < em > col< / em > ; otherwise returns FALSE.
< h3 class = fn > void < a name = "repaint" > < / a > TQListViewItem::repaint () const
< / h3 >
Repaints this item on the screen if it is currently visible.
< p > Example: < a href = "addressbook-example.html#x593" > addressbook/centralwidget.cpp< / a > .
< h3 class = fn > int < a name = "rtti" > < / a > TQListViewItem::rtti () const< tt > [virtual]< / tt >
< / h3 >
Returns 0.
< p > Make your derived classes return their own values for < a href = "#rtti" > rtti< / a > (), 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.
< p > Reimplemented in < a href = "qchecklistitem.html#rtti" > TQCheckListItem< / a > .
< h3 class = fn > void < a name = "setDragEnabled" > < / a > TQListViewItem::setDragEnabled ( bool allow )< tt > [virtual]< / tt >
< / h3 >
If < em > allow< / em > is TRUE, the list view starts a drag (see
< a href = "ntqlistview.html#dragObject" > TQListView::dragObject< / a > ()) when the user presses and moves the mouse
on this item.
< h3 class = fn > void < a name = "setDropEnabled" > < / a > TQListViewItem::setDropEnabled ( bool allow )< tt > [virtual]< / tt >
< / h3 >
If < em > allow< / em > is TRUE, the list view accepts drops onto the item;
otherwise drops are not allowed.
< h3 class = fn > void < a name = "setEnabled" > < / a > TQListViewItem::setEnabled ( bool b )< tt > [virtual]< / tt >
< / h3 >
If < em > b< / em > 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.
< h3 class = fn > void < a name = "setExpandable" > < / a > TQListViewItem::setExpandable ( bool enable )< tt > [virtual]< / tt >
< / h3 >
Sets this item to be expandable even if it has no children if < em > enable< / em > is TRUE, and to be expandable only if it has children if < em > enable< / em > is FALSE (the default).
< p > The dirview example uses this in the canonical fashion. It checks
whether the directory is empty in < a href = "#setup" > setup< / a > () and calls
< a href = "#setExpandable" > setExpandable< / a > (TRUE) if not; in < a href = "#setOpen" > setOpen< / a > () 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.
< p > Note that root items are not expandable by the user unless
< a href = "ntqlistview.html#setRootIsDecorated" > TQListView::setRootIsDecorated< / a > () is set to TRUE.
< p > < p > See also < a href = "#setSelectable" > setSelectable< / a > ().
< h3 class = fn > void < a name = "setHeight" > < / a > TQListViewItem::setHeight ( int height )< tt > [virtual protected]< / tt >
< / h3 >
Sets this item's height to < em > height< / em > pixels. This implicitly
changes < a href = "#totalHeight" > totalHeight< / a > (), too.
< p > Note that a font change causes this height to be overwritten
unless you reimplement < a href = "#setup" > setup< / a > ().
< p > For best results in Windows style we suggest using an even number
of pixels.
< p > < p > See also < a href = "#height" > height< / a > (), < a href = "#totalHeight" > totalHeight< / a > (), and < a href = "#isOpen" > isOpen< / a > ().
< h3 class = fn > void < a name = "setMultiLinesEnabled" > < / a > TQListViewItem::setMultiLinesEnabled ( bool b )< tt > [virtual]< / tt >
< / h3 >
If < em > b< / em > is TRUE each of the item's columns may contain multiple
lines of text; otherwise each of them may only contain a single
line.
< h3 class = fn > void < a name = "setOpen" > < / a > TQListViewItem::setOpen ( bool o )< tt > [virtual]< / tt >
< / h3 >
Opens or closes an item, i.e. shows or hides an item's children.
< p > If < em > o< / em > is TRUE all child items are shown initially. The user can
hide them by clicking the < b > -< / b > icon to the left of the item.
If < em > o< / em > is FALSE, the children of this item are initially hidden.
The user can show them by clicking the < b > +< / b > icon to the left
of the item.
< p > < p > See also < a href = "#height" > height< / a > (), < a href = "#totalHeight" > totalHeight< / a > (), and < a href = "#isOpen" > isOpen< / a > ().
< p > Examples: < a href = "checklists-example.html#x431" > checklists/checklists.cpp< / a > , < a href = "dirview-example.html#x1690" > dirview/dirview.cpp< / a > , < a href = "dirview-example.html#x1718" > dirview/main.cpp< / a > , < a href = "fileiconview-example.html#x887" > fileiconview/mainwindow.cpp< / a > , and < a href = "tagreader-with-features-example.html#x1966" > xml/tagreader-with-features/structureparser.cpp< / a > .
< h3 class = fn > void < a name = "setPixmap" > < / a > TQListViewItem::setPixmap ( int column, const < a href = "tqpixmap.html" > TQPixmap< / a > & pm )< tt > [virtual]< / tt >
< / h3 >
Sets the pixmap in column < em > column< / em > to < em > pm< / em > , if < em > pm< / em > is non-null
and different from the current pixmap, and if < em > column< / em > is
non-negative.
< p > < p > See also < a href = "#pixmap" > pixmap< / a > () and < a href = "#setText" > setText< / a > ().
< p > Example: < a href = "dirview-example.html#x1691" > dirview/dirview.cpp< / a > .
< h3 class = fn > void < a name = "setRenameEnabled" > < / a > TQListViewItem::setRenameEnabled ( int col, bool b )< tt > [virtual]< / tt >
< / h3 >
If < em > b< / em > is TRUE, this item can be in-place renamed in the column
< em > col< / em > by the user; otherwise it cannot be renamed in-place.
< h3 class = fn > void < a name = "setSelectable" > < / a > TQListViewItem::setSelectable ( bool enable )< tt > [virtual]< / tt >
< / h3 >
Sets this item to be selectable if < em > enable< / em > is TRUE (the
default) or not to be selectable if < em > enable< / em > is FALSE.
< p > 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. < a href = "#setSelected" > setSelected< / a > () respects this value).
< p > < p > See also < a href = "#isSelectable" > isSelectable< / a > ().
< h3 class = fn > void < a name = "setSelected" > < / a > TQListViewItem::setSelected ( bool s )< tt > [virtual]< / tt >
< / h3 >
If < em > s< / em > is TRUE this item is selected; otherwise it is deselected.
< p > This function does not maintain any invariants or repaint anything
-- < a href = "ntqlistview.html#setSelected" > TQListView::setSelected< / a > () does that.
< p > < p > See also < a href = "#height" > height< / a > () and < a href = "#totalHeight" > totalHeight< / a > ().
< p > Example: < a href = "addressbook-example.html#x594" > addressbook/centralwidget.cpp< / a > .
< h3 class = fn > void < a name = "setText" > < / a > TQListViewItem::setText ( int column, const < a href = "tqstring.html" > TQString< / a > & text )< tt > [virtual]< / tt >
< / h3 >
Sets the text in column < em > column< / em > to < em > text< / em > , if < em > column< / em > is a
valid column number and < em > text< / em > is different from the existing
text.
< p > If < em > text()< / em > has been reimplemented, this function may be a no-op.
< p > < p > See also < a href = "#text" > text< / a > () and < a href = "#key" > key< / a > ().
< p > Examples: < a href = "addressbook-example.html#x595" > addressbook/centralwidget.cpp< / a > and < a href = "outliner-example.html#x1916" > xml/outliner/outlinetree.cpp< / a > .
< h3 class = fn > void < a name = "setVisible" > < / a > TQListViewItem::setVisible ( bool b )
< / h3 >
If < em > b< / em > is TRUE, the item is made visible; otherwise it is hidden.
< p > If the item is not visible, < a href = "#itemAbove" > itemAbove< / a > () and < a href = "#itemBelow" > itemBelow< / a > () will never
return this item, although you still can reach it by using e.g.
< a href = "qlistviewitemiterator.html" > TQListViewItemIterator< / a > .
< h3 class = fn > void < a name = "setup" > < / a > TQListViewItem::setup ()< tt > [virtual]< / tt >
< / h3 >
This virtual function is called before the first time < a href = "ntqlistview.html" > TQListView< / a >
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.
< p > The default calls < a href = "#widthChanged" > widthChanged< / a > () 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
< a href = "#setHeight" > setHeight< / a > () yourself or reimplement it.)
< p > Example: < a href = "dirview-example.html#x1692" > dirview/dirview.cpp< / a > .
< h3 class = fn > void < a name = "sort" > < / a > TQListViewItem::sort ()< tt > [virtual]< / tt >
< / h3 >
Sorts all this item's child items using the current sorting
configuration (sort column and direction).
< p > < p > See also < a href = "#enforceSortOrder" > enforceSortOrder< / a > ().
< h3 class = fn > void < a name = "sortChildItems" > < / a > TQListViewItem::sortChildItems ( int column, bool ascending )< tt > [virtual]< / tt >
< / h3 >
Sorts this item's children using column < em > column< / em > . This is done in
ascending order if < em > ascending< / em > is TRUE and in descending order if
< em > ascending< / em > is FALSE.
< p > Asks some of the children to sort their children. (< a href = "ntqlistview.html" > TQListView< / a > and
TQListViewItem ensure that all on-screen objects are properly
sorted but may avoid or defer sorting other objects in order to be
more responsive.)
< p > < p > See also < a href = "#key" > key< / a > () and < a href = "#compare" > compare< / a > ().
< h3 class = fn > void < a name = "startRename" > < / a > TQListViewItem::startRename ( int col )< tt > [virtual]< / tt >
< / h3 >
If in-place renaming of this item is enabled (see
< a href = "#renameEnabled" > renameEnabled< / a > ()), this function starts renaming the item in column
< em > col< / em > , by creating and initializing an edit box.
< h3 class = fn > void < a name = "takeItem" > < / a > TQListViewItem::takeItem ( < a href = "qlistviewitem.html" > TQListViewItem< / a > * item )< tt > [virtual]< / tt >
< / h3 >
Removes < em > item< / em > 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
< a href = "#~TQListViewItem" > TQListViewItem::~TQListViewItem< / a > () calls it.
< p > The normal way to delete an item is to use < tt > delete< / tt > .
< p > If you need to move an item from one place in the hierarchy to
another you can use < a href = "#takeItem" > takeItem< / a > () to remove the item from the list
view and then < a href = "#insertItem" > insertItem< / a > () to put the item back in its new
position.
< p > If a taken item is part of a selection in < tt > Single< / tt > selection
mode, it is unselected and selectionChanged() is emitted. If a
taken item is part of a selection in < tt > Multi< / tt > or < tt > Extended< / tt >
selection mode, it remains selected.
< p > < b > Warning:< / b > This function leaves < em > item< / em > 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.
< p > < p > See also < a href = "#insertItem" > TQListViewItem::insertItem< / a > ().
< h3 class = fn > < a href = "tqstring.html" > TQString< / a > < a name = "text" > < / a > TQListViewItem::text ( int column ) const< tt > [virtual]< / tt >
< / h3 >
Returns the text in column < em > column< / em > , or < a href = "tqstring.html#TQString-null" > TQString::null< / a > if there is
no text in that column.
< p > < p > See also < a href = "#key" > key< / a > () and < a href = "#paintCell" > paintCell< / a > ().
< p > Examples: < a href = "addressbook-example.html#x596" > addressbook/centralwidget.cpp< / a > , < a href = "dirview-example.html#x1693" > dirview/dirview.cpp< / a > , < a href = "archivesearch-example.html#x477" > network/archivesearch/archivedialog.ui.h< / a > , and < a href = "ftpclient-example.html#x766" > network/ftpclient/ftpmainwindow.ui.h< / a > .
< h3 class = fn > int < a name = "totalHeight" > < / a > TQListViewItem::totalHeight () const
< / h3 >
Returns the total height of this object, including any visible
children. This height is recomputed lazily and cached for as long
as possible.
< p > Functions which can affect the total height are, < a href = "#setHeight" > setHeight< / a > () which
is used to set an item's height, < a href = "#setOpen" > setOpen< / a > () to show or hide an
item's children, and < a href = "#invalidateHeight" > invalidateHeight< / a > () to invalidate the cached
height.
< p > < p > See also < a href = "#height" > height< / a > ().
< h3 class = fn > int < a name = "width" > < / a > TQListViewItem::width ( const < a href = "tqfontmetrics.html" > TQFontMetrics< / a > & fm, const < a href = "ntqlistview.html" > TQListView< / a > * lv, int c ) const< tt > [virtual]< / tt >
< / h3 >
Returns the number of pixels of width required to draw column < em > c< / em >
of list view < em > lv< / em > , using the metrics < em > fm< / em > without cropping. The
list view containing this item may use this information depending
on the TQListView::WidthMode settings for the column.
< p > The default implementation returns the width of the bounding
rectangle of the text of column < em > c< / em > .
< p > < p > See also < a href = "#listView" > listView< / a > (), < a href = "#widthChanged" > widthChanged< / a > (), < a href = "ntqlistview.html#setColumnWidthMode" > TQListView::setColumnWidthMode< / a > (), and < a href = "ntqlistview.html#itemMargin-prop" > TQListView::itemMargin< / a > .
< h3 class = fn > void < a name = "widthChanged" > < / a > TQListViewItem::widthChanged ( int c = -1 ) const
< / h3 >
Call this function when the value of < a href = "#width" > width< / a > () may have changed for
column < em > c< / em > . Normally, you should call this if < a href = "#text" > text< / a > (c) changes.
Passing -1 for < em > c< / em > indicates that all columns may have changed.
It is more efficient to pass -1 if two or more columns have
changed than to call < a href = "#widthChanged" > widthChanged< / a > () separately for each one.
< p > < p > See also < a href = "#width" > width< / a > ().
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