QListView(3qt)QListView(3qt)NAME
QListView - Implements a list/tree view
#include <qlistview.h>
Inherits QScrollView.
Public Members
QListView ( QWidget * parent, const char * name, WFlags f
)
QListView ( QWidget * parent = 0, const char * name = 0 )
~QListView ()
int treeStepSize () const
virtual void setTreeStepSize ( int )
virtual void insertItem ( QListViewItem * )
virtual void takeItem ( QListViewItem * )
virtual void removeItem ( QListViewItem * ) (obsolete)
virtual void clear ()
QHeader* header () const
virtual int addColumn ( const QString & label, int size =
-1 )
virtual int addColumn ( const QIconSet & iconset, const
QString & label, int size = -1 )
void removeColumn ( int index )
virtual void setColumnText ( int column, const QString &
label )
virtual void setColumnText ( int column, const QIconSet &
iconset, const QString & label )
QString columnText ( int column ) const
virtual void setColumnWidth ( int column, int width )
int columnWidth ( int column ) const
enum WidthMode { Manual, Maximum }
virtual void setColumnWidthMode ( int column, WidthMode )
WidthMode columnWidthMode ( int column ) const
int columns () const
virtual void setColumnAlignment ( int, int )
int columnAlignment ( int ) const
QListViewItem* itemAt ( const QPoint & screenPos ) const
QRect itemRect ( const QListViewItem * ) const
int itemPos ( const QListViewItem * )
void ensureItemVisible ( const QListViewItem * )
void repaintItem ( const QListViewItem * ) const
virtual void setMultiSelection ( bool enable )
bool isMultiSelection () const
enum SelectionMode { Single, Multi, Extended, NoSelection
}
void setSelectionMode ( SelectionMode mode )
SelectionMode selectionMode () const
virtual void clearSelection ()
virtual void setSelected ( QListViewItem *, bool )
bool isSelected ( const QListViewItem * ) const
QListViewItem* selectedItem () const
virtual void setOpen ( QListViewItem *, bool )
Trolltech AS 13 June 2001 1
QListView(3qt)QListView(3qt)
bool isOpen ( const QListViewItem * ) const
virtual void setCurrentItem ( QListViewItem * )
QListViewItem* currentItem () const
QListViewItem* firstChild () const
int childCount () const
virtual void setAllColumnsShowFocus ( bool )
bool allColumnsShowFocus () const
virtual void setItemMargin ( int )
int itemMargin () const
virtual void setRootIsDecorated ( bool )
bool rootIsDecorated () const
virtual void setSorting ( int column, bool increasing =
TRUE )
void sort ()
virtual bool eventFilter ( QObject * o, QEvent * )
void setShowSortIndicator ( bool show )
bool showSortIndicator () const
Public Slots
void invertSelection ()
void selectAll ( bool select )
void triggerUpdate ()
Signals
void selectionChanged ()
void selectionChanged ( QListViewItem * )
void currentChanged ( QListViewItem * )
void clicked ( QListViewItem * )
void clicked ( QListViewItem *, const QPoint &, int )
void pressed ( QListViewItem * )
void pressed ( QListViewItem *, const QPoint &, int )
void doubleClicked ( QListViewItem * )
void returnPressed ( QListViewItem * )
void rightButtonClicked ( QListViewItem *, const QPoint &,
int )
void rightButtonPressed ( QListViewItem *, const QPoint &,
int )
void mouseButtonPressed ( int, QListViewItem *, const
QPoint &, int )
void mouseButtonClicked ( int, QListViewItem *, const
QPoint &, int )
void onItem ( QListViewItem * item )
void onViewport ()
void expanded ( QListViewItem * item )
void collapsed ( QListViewItem * item )
Protected Members
virtual void contentsMousePressEvent ( QMouseEvent * e )
virtual void contentsMouseReleaseEvent ( QMouseEvent * e )
virtual void contentsMouseMoveEvent ( QMouseEvent * e )
virtual void contentsMouseDoubleClickEvent ( QMouseEvent *
e )
virtual void resizeEvent ( QResizeEvent * e )
virtual void drawContentsOffset ( QPainter *, int ox, int
Trolltech AS 13 June 2001 2
QListView(3qt)QListView(3qt)
oy, int cx, int cy, int cw, int ch )
virtual void paintEmptyArea ( QPainter *, const QRect & )
Protected Slots
void updateContents ()
void doAutoScroll ()
Properties
Type Name READ WRITE Options
------------------------------------------------------------------------------------------------------
int columns columns
bool multiSelection isMultiSelection setMultiSelection DESIGNABLE false
SelectionMode selectionMode selectionMode setSelectionMode
int childCount childCount
bool allColumnsShowFocus allColumnsShowFocus setAllColumnsShowFocus
bool showSortIndicator showSortIndicator setShowSortIndicator
int itemMargin itemMargin setItemMargin
bool rootIsDecorated rootIsDecorated setRootIsDecorated
DESCRIPTION
The QListView class implements a list/tree view.
It can display and control a hierarchy of multi-column
items, and provides the ability to add new items at any
time, let the user select one or many items, sort the list
in increasing or decreasing order by any column, and so
on.
The simplest mode of usage is to create a QListView, add
some column headers using addColumn(), create one or more
QListViewItem objects with the QListView as parent, set up
the list view's geometry(), and show() it.
The main setup functions are
addColumn() - adds a column, with text and perhaps width.
setColumnWidthMode() - sets the column to be resized
automatically or not.
setAllColumnsShowFocus() - decides whether items should
show keyboard focus using all columns, or just column 0.
The default is to show focus using just column 0.
setRootIsDecorated() - decides whether root items can be
opened and closed by the user, and have open/close
decoration to their left. The default is FALSE.
setTreeStepSize() - decides the how many pixels an item's
children are indented relative to their parent. The
default is 20. This is mostly a matter of taste.
Trolltech AS 13 June 2001 3
QListView(3qt)QListView(3qt)setSorting() - decides whether the items should be sorted,
whether it should be in ascending or descending order, and
by what column it should be sorted.
To handle events such as mouse-presses on the listview,
derived classes can reimplement the QScrollView functions
contentsMousePressEvent, contentsMouseReleaseEvent,
contentsMouseDoubleClickEvent, contentsMouseMoveEvent,
contentsDragEnterEvent, contentsDragMoveEvent,
contentsDragLeaveEvent, contentsDropEvent, and
contentsWheelEvent.
There are also several functions for mapping between items
and coordinates. itemAt() returns the item at a position
on-screen, itemRect() returns the rectangle an item
occupies on the screen and itemPos() returns the position
of any item (not on-screen, in the list view).
firstChild() returns the item at the top of the view (not
necessarily on-screen) so you can iterate over the items
using either QListViewItem::itemBelow() or a combination
of QListViewItem::firstChild() and
QListViewItem::nextSibling().
Naturally, QListView provides a clear() function, as well
as an explicit insertItem() for when QListViewItem's
default insertion won't do.
There is a variety of selection modes, described in the
QListView::SelectionMode documentation. The default is
single-selection, and you can change it using
setSelectionMode(). For compatibility with previous Qt
versions there is still the setMultiSelection() methode.
Calling setMultiSelection( TRUE ) is equivalent to
setSelectionMode( Multi ), and setMultiSelection( FALSE )
is equivalent to setSelectionMode( Single ). It's
suggested not to use setMultiSelection() anymore, but to
use setSelectionMode() instead.
Since QListView offers multiple selection it has to
display keyboard focus and selection state separately.
Therefore there are functions both to set the selection
state of an item, setSelected(), and to select which item
displays keyboard focus, setCurrentItem().
QListView emits two groups of signals: One group signals
changes in selection/focus state and one signals
selection. The first group consists of selectionChanged(),
applicable to all list views, and selectionChanged(
QListViewItem * ), applicable only to single-selection
list view, and currentChanged( QListViewItem * ). The
second group consists of doubleClicked( QListViewItem * ),
returnPressed( QListViewItem * ) and rightButtonClicked(
QListViewItem *, const QPoint&, int ), etc.
Trolltech AS 13 June 2001 4
QListView(3qt)QListView(3qt)
In Motif style, QListView deviates fairly strongly from
the look and feel of the Motif hierarchical tree view.
This is done mostly to provide a usable keyboard interface
and to make the list view look better with a white
background.
Warning: The list view assumes ownership of all list view
items and will delete them when it does not need them any
more.
[Image Omitted]
[Image Omitted]
Examples: xml/tagreader
Member Type Documentation
QListView::SelectionMode
This enumerated type is used by QListView to indicate how
it reacts to selection by the user. It has four values:
Single - When the user selects an item, any
already-selected item becomes unselected, and the user
cannot unselect the selected item. This means that the
user can never clear the selection, even though the
selection may be cleared by the application programmer
using QListView::clearSelection().
Multi - When the user selects an item in the most ordinary
way, the selection status of that item is toggled and the
other items are left alone.
Extended - When the user selects an item in the most
ordinary way, the selection is cleared and the new item
selected. However, if the user presses the CTRL key when
clicking on an item, the clicked item gets toggled and all
other items are left untouched. And if the user presses
the SHIFT key while clicking on an item, all items between
the current item and the clicked item get selected or
unselected depending on the state of the clicked item.
Also multiple items can be selected by dragging the mouse
while the left mouse button stayes pressed.
NoSelection - Items cannot be selected.
In other words, Single is a real single-selection
listview, Multi a real multi-selection listview, and
Extended listview where users can select multiple items
but usually want to select either just one or a range of
contiguous items, and NoSelection is for a listview where
the user can look but not touch.
Trolltech AS 13 June 2001 5
QListView(3qt)QListView(3qt)QListView::WidthMode
This enum type describes how the width of a column in the
view changes. The currently defined modes are:
Manual - the column width does not change automatically
Maximum - the column is automatically sized according to
the widths of all items in the column. (Note: The column
never shrinks in this case.) This means the column is
always resized to the width of the item with the largest
width in the column.
See also setColumnWidth(), setColumnWidthMode() and
columnWidth().
MEMBER FUNCTION DOCUMENTATIONQListView::QListView ( QWidget * parent = 0, const char * name =
0 )
Constructs a new empty list view, with parent as a parent
and name as object name.
Performance is boosted by modifying the widget flags so
that only part of the QListViewItem children is redrawn.
This may be unsuitable for custom QListViewItem classes,
in which case WNorthWestGravity and WRepaintNoErase should
be cleared.
See also QWidget::clearWFlags() and Qt::WidgetFlags.
QListView::QListView ( QWidget * parent, const char * name,
WFlags f )
Constructs a new empty list view, with parent as a parent
and name as object name.
Performance is boosted by modifying the widget flags f so
that only part of the QListViewItem children is redrawn.
This may be unsuitable for custom QListViewItem classes,
in which case WNorthWestGravity and WRepaintNoErase should
be cleared.
See also QWidget::clearWFlags() and Qt::WidgetFlags.
QListView::~QListView ()
Destructs the listview, deleting all items in it, and
frees up all allocated resources.
int QListView::addColumn ( const QIconSet & iconset, const
QString & label, int width = -1 ) [virtual]
Adds a new column at the right end of the widget, with the
header label and iconset, and returns the index of the
column.
If width is negative, the new column will have WidthMode
Trolltech AS 13 June 2001 6
QListView(3qt)QListView(3qt)
Maximum, otherwise it will be Manual at width pixels wide.
See also setColumnText(), setColumnWidth() and
setColumnWidthMode().
Examples: dirview/main.cpp
int QListView::addColumn ( const QString & label, int width = -1
) [virtual]
Adds a new column at the right end of the widget, with the
header label, and returns the index of the column.
If width is negative, the new column will have WidthMode
Maximum, otherwise it will be Manual at width pixels wide.
See also setColumnText(), setColumnWidth() and
setColumnWidthMode().
bool QListView::allColumnsShowFocus () const
Returns TRUE if the items in this list view indicate focus
and selection state using all of their columns, else
FALSE.
See also setAllColumnsShowFocus().
int QListView::childCount () const
Returns the current number of parentless QListViewItem
objects in this QListView, like
QListViewItem::childCount() returns the number of child
items for a QListViewItem.
See also QListViewItem::childCount().
void QListView::clear () [virtual]
Remove and delete all the items in this list view, and
trigger an update.
See also triggerUpdate().
void QListView::clearSelection () [virtual]
Sets all items to be not selected, updates the list view
as necessary and emits the selectionChanged() signals.
Note that for multi-selection list views, this function
needs to iterate over all items.
See also setSelected() and setMultiSelection().
void QListView::clicked ( QListViewItem * item ) [signal]
This signal is emitted whenever the user clicks (mouse
pressed + mouse released) into the listview. item is the
pointer to the clicked listview item or NULL, if the user
didn't click on an item.
Note that you may not delete any QListViewItem objects in
Trolltech AS 13 June 2001 7
QListView(3qt)QListView(3qt)
slots connected to this signal.
void QListView::clicked ( QListViewItem * item, const QPoint &
pnt, int c ) [signal]
This signal is emitted whenever the user clicks (mouse
pressed + mouse released) into the listview. item is the
pointer to the clicked listview item or NULL, if the user
didn't click on an item. pnt is the position where the
user has clicked, and c the column into which the user
clicked.
Note that you may not delete any QListViewItem objects in
slots connected to this signal.
void QListView::collapsed ( QListViewItem * item ) [signal]
This signals is emitted when the item has been collapsed.
This means the children of the item are hidden because the
user double-clicked the item or clicked on the root
decoration, or setOpen() with FALSE as argument has been
called.
See also expanded().
int QListView::columnAlignment ( int column ) const
Returns the alignment of logical column column. The
default is AlignLeft.
See also Qt::AlignmentFlags.
QString QListView::columnText ( int c ) const
Returns the text of column c.
int QListView::columnWidth ( int c ) const
Returns the width of column c.
QListView::WidthMode QListView::columnWidthMode( int c ) const
Returns the currently set WidthMode for column c.
See also setColumnWidthMode().
int QListView::columns () const
Returns the number of columns of this list view.
See also addColumn() and removeColumn().
void QListView::contentsMouseDoubleClickEvent ( QMouseEvent * e )
[virtual protected]
Processes mouse double-click events on behalf of the
viewed widget.
Reimplemented from QScrollView.
void QListView::contentsMouseMoveEvent ( QMouseEvent * e )
[virtual protected]
Trolltech AS 13 June 2001 8
QListView(3qt)QListView(3qt)
Processes mouse move events on behalf of the viewed
widget.
Reimplemented from QScrollView.
void QListView::contentsMousePressEvent ( QMouseEvent * e )
[virtual protected]
Processes mouse move events on behalf of the viewed
widget.
Reimplemented from QScrollView.
void QListView::contentsMouseReleaseEvent ( QMouseEvent * e )
[virtual protected]
Processes mouse move events on behalf of the viewed
widget.
Reimplemented from QScrollView.
void QListView::currentChanged ( QListViewItem * ) [signal]
This signal is emitted whenever the current item has
changed (normally after the screen update). The current
item is the item responsible for indicating keyboard
focus.
The argument is the newly current item, or 0 if the change
was to make no item current. This can happen e.g. if all
items in the list view are deleted.
Note that you may not delete any QListViewItem objects in
slots connected to this signal.
See also setCurrentItem() and currentItem().
QListViewItem * QListView::currentItem () const
Returns a pointer to the currently highlighted item, or 0
if there isn't any.
See also setCurrentItem().
void QListView::doAutoScroll () [protected slot]
This slot handles auto-scrolling when the mouse button is
pressed and the mouse is outside the widget.
void QListView::doubleClicked ( QListViewItem * item ) [signal]
This signal is emitted whenever an item is double-clicked.
It's emitted on the second button press, not the second
button release. item is the listview item onto which the
user did the double click.
void QListView::drawContentsOffset ( QPainter * p, int ox, int
oy, int cx, int cy, int cw, int ch ) [virtual protected]
Calls QListViewItem::paintCell() and/or
QListViewItem::paintBranches() for all list view items
Trolltech AS 13 June 2001 9
QListView(3qt)QListView(3qt)
that require repainting. See the documentation for those
functions for details.
Reimplemented from QScrollView.
void QListView::enabledChange ( bool e ) [virtual protected]
Reimplemented for internal reasons; the API is not
affected.
Reimplemented from QWidget.
void QListView::ensureItemVisible ( const QListViewItem * i )
Ensures that i is made visible, scrolling the list view
vertically as required and opens (expands)also all parent
items if they hide their children.
See also itemRect() and QScrollView::ensureVisible().
bool QListView::eventFilter ( QObject * o, QEvent * e ) [virtual]
Redirects events for the viewport to mousePressEvent(),
keyPressEvent() and friends.
Reimplemented from QObject.
void QListView::expanded ( QListViewItem * item ) [signal]
This signals is emitted when the item has been expanded.
This means the children of the item are shown because the
user double-clicked the item or clicked on the root
decoration, or setOpen() with TRUE as argument has been
called.
See also collapsed().
QListViewItem * QListView::firstChild () const
Returns the first item in this QListView. You can use its
firstChild() and nextSibling() functions to traverse the
entire tree of items.
Returns 0 if there is no first item.
See also itemAt(), QListViewItem::itemBelow() and
QListViewItem::itemAbove().
void QListView::focusInEvent ( QFocusEvent * e ) [virtual
protected]
Reimplemented for internal reasons; the API is not
affected.
Reimplemented from QWidget.
void QListView::focusOutEvent ( QFocusEvent * ) [virtual
protected]
Reimplemented for internal reasons; the API is not
affected.
Trolltech AS 13 June 2001 10
QListView(3qt)QListView(3qt)
Reimplemented from QWidget.
QHeader * QListView::header () const
Returns a pointer to the QHeader object that manages this
list view's columns. Please don't modify the header behind
the list view's back.
Acceptable methods to call are:
void QHeader::setClickEnabled( bool, int logIdx = -1 );
void QHeader::setResizeEnabled( bool, int logIdx = -1 );
void QHeader::setMovingEnabled( bool );
void QListView::insertItem ( QListViewItem * i ) [virtual]
Inserts i into the list view as a top-level item. You do
not need to call this unless you've called takeItem( i )
or QListViewItem::takeItem( i ) and need to reinsert i
elsewhere.
See also QListViewItem::takeItem(), (important) and
takeItem().
void QListView::invertSelection () [slot]
Inverts the selection. Works only in Multi and Extended
selection mode.
bool QListView::isMultiSelection () const
Returns TRUE if this list view is in multi-selection mode
and FALSE if it is in single-selection mode.
See also setMultiSelection().
bool QListView::isOpen ( const QListViewItem * item ) const
Identical to item->isOpen(). Provided for completeness.
See also setOpen().
bool QListView::isSelected ( const QListViewItem * i ) const
Returns i->isSelected().
Provided only because QListView provides setSelected() and
trolls are neat creatures and like neat, orthogonal
interfaces.
QListViewItem * QListView::itemAt ( const QPoint & viewPos )
const
Returns a pointer to the QListViewItem at viewPos. Note
that viewPos is in the coordinate system of viewport(),
not in the listview's own, much larger, coordinate system.
itemAt() returns 0 if there is no such item.
Trolltech AS 13 June 2001 11
QListView(3qt)QListView(3qt)
Note, that you also get the pointer to the item if viewPos
points onto the root decoration (see setRootIsDecorated())
of the item. To check if viewPos is on the root decoration
of the item or not, you can do something like
QListViewItem *i = itemAt( p );
if ( i ) {
if ( p.x() > header()->cellPos( header()->mapToActual( 0 ) ) +
treeStepSize() * ( i->depth() + ( rootIsDecorated() ? 1 : 0) ) + itemMargin() ||
p.x() < header()->cellPos( header()->mapToActual( 0 ) ) ) {
; // p is not not in root decoration
else
; // p is in the root decoration
}
This might be interesting if you use this method to find
out where the user clicked and if you e.g. want to start a
drag (which you do not want to do if the user clicked onto
the root decoration of an item)
See also itemPos() and itemRect().
int QListView::itemMargin () const
Returns the advisory item margin which list items may use.
See also QListViewItem::paintCell() and setItemMargin().
int QListView::itemPos ( const QListViewItem * item )
Returns the y coordinate of item in the list view's
coordinate system. This functions is normally much slower
than itemAt(), but it works for all items, while itemAt()
normally works only for items on the screen.
This is a thin wrapper around QListViewItem::itemPos().
See also itemAt() and itemRect().
QRect QListView::itemRect ( const QListViewItem * i ) const
Returns the rectangle on the screen i occupies in
viewport()'s coordinates, or an invalid rectangle if i is
a null pointer or is not currently visible.
The rectangle returned does not include any children of
the rectangle (ie. it uses QListViewItem::height() rather
than QListViewItem::totalHeight()). If you want the
rectangle including children, you can use something like
this code:
QRect r( listView->itemRect( item ) );
r.setHeight( (QCOORD)(QMIN( item->totalHeight(),
listView->viewport->height() - r.y() ) ) )
Note the way it avoids too-high rectangles. totalHeight()
can be much larger than the window system's coordinate
Trolltech AS 13 June 2001 12
QListView(3qt)QListView(3qt)
system allows.
itemRect() is comparatively slow. It's best to call it
only for items that are probably on-screen.
void QListView::keyPressEvent ( QKeyEvent * e ) [virtual
protected]
Reimplemented for internal reasons; the API is not
affected.
Reimplemented from QWidget.
QSize QListView::minimumSizeHint () const [virtual]
Reimplemented for internal reasons; the API is not
affected.
Reimplemented from QWidget.
void QListView::mouseButtonClicked ( int button, QListViewItem *
item, const QPoint & pos, int c ) [signal]
This signal is emitted whenever the user clicks (mouse
pressed + mouse released) into the listview. button is the
mouse button which the user pressed, item is the pointer
to the clicked listview item or NULL, if the user didn't
click on an item, and c the listview column into which the
user pressed (this argument is only valid, if item is not
NULL!)
Note that you may not delete any QListViewItem objects in
slots connected to this signal.
void QListView::mouseButtonPressed ( int button, QListViewItem *
item, const QPoint & pos, int c ) [signal]
This signal is emitted whenever the user pressed the mouse
button onto the listview. button is the mouse button which
the user pressed, item is the pointer to the pressed
listview item or NULL, if the user didn't press on an
item, and c the listview column into which the user
pressed (this argument is only valid, if item is not
NULL!)
Note that you may not delete any QListViewItem objects in
slots connected to this signal.
void QListView::onItem ( QListViewItem * i ) [signal]
This signal is emitted, when the user moves the mouse
cursor onto an item. Its only emitted once per item.
void QListView::onViewport () [signal]
This signal is emitted, when the user moves the mouse
cursor, which was on an item away from the item onto the
viewport.
Trolltech AS 13 June 2001 13
QListView(3qt)QListView(3qt)void QListView::paintEmptyArea ( QPainter * p, const QRect & rect
) [virtual protected]
Paints rect so that it looks like empty background using
painter p. rect is is widget coordinates, ready to be fed
to p.
The default function fills rect with colorGroup().brush(
QColorGroup::Base ).
void QListView::pressed ( QListViewItem * item ) [signal]
This signal is emitted whenever the user presses the mouse
button on a listview. item is the pointer to the listview
item onto which the user pressed the mouse button or NULL,
if the user didn't press the mouse on an item.
Note that you may not delete any QListViewItem objects in
slots connected to this signal.
void QListView::pressed ( QListViewItem * item, const QPoint &
pnt, int c ) [signal]
This signal is emitted whenever the user presses the mouse
button on a listview. item is the pointer to the listview
item onto which the user pressed the mouse button or NULL,
if the user didn't press the mouse on an item. pnt is the
position of the mouse cursor, and c the column into which
the mouse cursor was when the user pressed the mouse
button.
Note that you may not delete any QListViewItem objects in
slots connected to this signal.
void QListView::removeColumn ( int index )
Removes the column at position index.
void QListView::removeItem ( QListViewItem * i ) [virtual]
This function is obsolete. It is provided to keep old
source working, and will probably be removed in a future
version of Qt. We strongly advise against using it in new
code.
This function has been renamed takeItem().
void QListView::repaintItem ( const QListViewItem * item ) const
Repaints item on the screen, if item is currently visible.
Takes care to avoid multiple repaints.
void QListView::resizeEvent ( QResizeEvent * e ) [virtual
protected]
Ensures that the header is correctly sized and positioned.
Reimplemented from QWidget.
void QListView::returnPressed ( QListViewItem * ) [signal]
This signal is emitted when enter or return is pressed.
Trolltech AS 13 June 2001 14
QListView(3qt)QListView(3qt)
The argument is currentItem().
void QListView::rightButtonClicked ( QListViewItem *, const
QPoint &, int ) [signal]
This signal is emitted when the right button is clicked
(ie. when it's released). The arguments are the relevant
QListViewItem (may be 0), the point in global coordinates
and the relevant column (or -1 if the click was outside
the list).
void QListView::rightButtonPressed ( QListViewItem *, const
QPoint &, int ) [signal]
This signal is emitted when the right button is pressed.
Then arguments are the relevant QListViewItem (may be 0),
the point in global coordinates and the relevant column
(or -1 if the click was outside the list).
bool QListView::rootIsDecorated () const
Returns TRUE if root items can be opened and closed by the
user, FALSE if not.
void QListView::selectAll ( bool select ) [slot]
If select is TRUE, all items get selected, else all get
unselected. This works only in the selection modes Multi
and Extended. In Single and NoSelection mode the selection
of the current item is just set to select.
QListViewItem * QListView::selectedItem () const
Returns a pointer to the selected item, if the list view
is in single-selection mode and an item is selected.
If no items are selected or the list view is in multi-
selection mode this function returns 0.
See also setSelected() and setMultiSelection().
void QListView::selectionChanged () [signal]
This signal is emitted whenever the set of selected items
has changed (normally before the screen update). It is
available both in single-selection and multi-selection
mode, but is most meaningful in multi-selection mode.
Note that you may not delete any QListViewItem objects in
slots connected to this signal.
See also setSelected() and QListViewItem::setSelected().
void QListView::selectionChanged ( QListViewItem * ) [signal]
This signal is emitted whenever the selected item has
changed in single-selection mode (normally after the
screen update). The argument is the newly selected item.
There is another signal which is more useful in multi-
selection mode.
Trolltech AS 13 June 2001 15
QListView(3qt)QListView(3qt)
Note that you may not delete any QListViewItem objects in
slots connected to this signal.
See also setSelected(), QListViewItem::setSelected() and
currentChanged().
QListView::SelectionMode QListView::selectionMode() const
Returns the selection mode of the list view. The initial
mode is Single.
See also setSelectionMode(), isMultiSelection() and
setMultiSelection().
void QListView::setAllColumnsShowFocus ( bool enable ) [virtual]
Sets this list view to assume that the items show focus
and selection state using all of their columns if enable
is TRUE, or that they show it just using column 0 if
enable is FALSE.
The default is FALSE.
Setting this to TRUE if it isn't necessary can cause
noticeable flicker.
See also allColumnsShowFocus().
Examples: dirview/main.cpp
void QListView::setColumnAlignment ( int column, int align )
[virtual]
Configures the logical column column to have alignment
align. The alignment is ultimately passed to
QListViewItem::paintCell() for each item in the view.
See also Qt::AlignmentFlags.
void QListView::setColumnText ( int column, const QIconSet &
iconset, const QString & label ) [virtual]
Sets the heading text of column column to iconset and
label. The leftmost colum is number 0.
void QListView::setColumnText ( int column, const QString & label
) [virtual]
Sets the heading text of column column to label. The
leftmost colum is number 0.
void QListView::setColumnWidth ( int column, int w ) [virtual]
Sets the width of column column to w pixels. Note that if
the column has a WidthMode other than Manual, this width
setting may be subsequently overridden. The leftmost colum
is number 0.
void QListView::setColumnWidthMode ( int c, WidthMode mode )
Sets column c to behave according to mode. The default
Trolltech AS 13 June 2001 16
QListView(3qt)QListView(3qt)
depends on whether the width argument to addColumn was
positive or negative.
See also QListViewItem::width().
void QListView::setContentsPos ( int x, int y ) [virtual slot]
Reimplemented for internal reasons; the API is not
affected.
Reimplemented from QScrollView.
void QListView::setCurrentItem ( QListViewItem * i ) [virtual]
Sets i to be the current highlighted item and repaints
appropriately. This highlighted item is used for keyboard
navigation and focus indication; it doesn't mean anything
else.
See also currentItem().
void QListView::setFont ( const QFont & f ) [virtual]
Reimplemented for internal reasons; the API is not
affected.
void QListView::setItemMargin ( int m ) [virtual]
Sets the advisory item margin which list items may use to
m.
The item margin defaults to one pixel and is the margin
between the item's edges and the area where it draws its
contents. QListViewItem::paintFocus() draws in the margin.
See also QListViewItem::paintCell().
void QListView::setMultiSelection ( bool enable ) [virtual]
Sets the list view to multi-selection mode if enable is
TRUE, and to single-selection mode if enable is FALSE.
If you enable multi-selection mode, it's possible to
specify if this mode should be extended or not. Extended
means, that the user can only select multiple items when
pressing the Shift or Control button at the same time.
See also isMultiSelection().
void QListView::setOpen ( QListViewItem * item, bool open )
[virtual]
Sets item to be open if open is TRUE and item is
expandable, and to be closed if open is FALSE. Repaints
accordingly.
Does nothing if item is not expandable.
See also QListViewItem::setOpen() and
QListViewItem::setExpandable().
Trolltech AS 13 June 2001 17
QListView(3qt)QListView(3qt)void QListView::setPalette ( const QPalette & p ) [virtual]
Reimplemented for internal reasons; the API is not
affected.
void QListView::setRootIsDecorated ( bool enable ) [virtual]
Sets this list view to show open/close signs on root items
if enable is TRUE, and to not show such signs if enable is
FALSE.
Open/close signs is a little + or - in windows style, an
arrow in Motif style.
void QListView::setSelected ( QListViewItem * item, bool selected
) [virtual]
Sets item to be selected if selected is TRUE, and to be
not selected if selected is FALSE.
If the list view is in single-selection mode and selected
is TRUE, the currently selected item is unselected and
item made current. Unlike QListViewItem::setSelected(),
this function updates the list view as necessary and emits
the selectionChanged() signals.
See also isSelected(), setMultiSelection(),
isMultiSelection() and setCurrentItem().
void QListView::setSelectionMode ( SelectionMode mode )
Sets the list view's selection mode, which may be one of
Single (the default), Extended, Multi or NoSelection.
See also selectionMode().
void QListView::setShowSortIndicator ( bool show )
If show is TRUE, draw an arrow in the header of the
listview to indicate the sort order of the listview
contents. The arrow will be drawn in the correct column
and will point to the correct direction. Set show to FALSE
to disable this feature.
See also QHeader::setSortIndicator().
void QListView::setSorting ( int column, bool ascending = TRUE )
[virtual]
Set the list view to be sorted by column and to be sorted
in ascending order if ascending is TRUE or descending
order if it is FALSE.
If column is -1, sorting is disabled and the user cannot
sort columns by clicking on the column headers.
void QListView::setTreeStepSize ( int l ) [virtual]
Sets the the number of pixels a child is offset from its
parent, in a tree view to l. The default is 20.
Trolltech AS 13 June 2001 18
QListView(3qt)QListView(3qt)
See also treeStepSize().
Examples: dirview/main.cpp
void QListView::show () [virtual]
Reimplemented for internal reasons; the API is not
affected.
Examples: dirview/main.cpp
Reimplemented from QWidget.
void QListView::showEvent ( QShowEvent * ) [virtual protected]
Reimplemented for internal reasons; the API is not
affected.
Reimplemented from QWidget.
bool QListView::showSortIndicator () const
Returns TRUE, if the sort order and column are indicated
in the header, else FALSE.
See also QListView::setSortIndicator().
QSize QListView::sizeHint () const [virtual]
Reimplemented for internal reasons; the API is not
affected.
Reimplemented from QWidget.
void QListView::sort ()
(Re)sorts the listview using the last sorting
configuration (sort column and ascending/descending).
void QListView::styleChange ( QStyle & old ) [virtual protected]
Reimplemented for internal reasons; the API is not
affected.
Reimplemented from QWidget.
void QListView::takeItem ( QListViewItem * i ) [virtual]
Removes i from the list view; i must be a top-level item.
The warnings regarding QListViewItem::takeItem( i ) apply
to this function too.
See also QListViewItem::takeItem(), (important) and
insertItem().
int QListView::treeStepSize () const
Returns the number of pixels a child is offset from its
parent. This number has meaning only for tree views. The
default is 20.
See also setTreeStepSize().
Trolltech AS 13 June 2001 19
QListView(3qt)QListView(3qt)void QListView::triggerUpdate () [slot]
Triggers a size, geometry and content update during the
next iteration of the event loop. Cleverly makes sure that
there'll be just one update, to avoid flicker.
void QListView::updateContents () [protected slot]
Updates the sizes of the viewport, header, scrollbars and
so on. Don't call this directly; call triggerUpdate()
instead.
SEE ALSO
http://doc.trolltech.com/qlistview.html
http://www.trolltech.com/faq/tech.html
COPYRIGHT
Copyright 1992-2001 Trolltech AS,
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
make our job much simpler. Thank you.
In case of content or formattting problems with this
manual page, please report them to qt-bugs@trolltech.com.
Please include the name of the manual page (qlistview.3qt)
and the Qt version (2.3.1).
Trolltech AS 13 June 2001 20
