QIconView(3qt)QIconView(3qt)NAMEQIconView - Area with movable labelled icons
SYNOPSIS
#include <qiconview.h>
Inherits QScrollView.
Public Members
enum SelectionMode { Single = 0, Multi, Extended, NoSelection }
enum Arrangement { LeftToRight = 0, TopToBottom }
enum ResizeMode { Fixed = 0, Adjust }
enum ItemTextPos { Bottom = 0, Right }
QIconView ( QWidget * parent = 0, const char * name = 0, WFlags f = 0 )
virtual ~QIconView ()
virtual void insertItem ( QIconViewItem * item, QIconViewItem * after =
0L )
virtual void takeItem ( QIconViewItem * item )
int index ( const QIconViewItem * item ) const
QIconViewItem * firstItem () const
QIconViewItem * lastItem () const
QIconViewItem * currentItem () const
virtual void setCurrentItem ( QIconViewItem * item )
virtual void setSelected ( QIconViewItem * item, bool s, bool cb =
FALSE )
uint count () const
virtual void setSelectionMode ( SelectionMode m )
SelectionMode selectionMode () const
QIconViewItem * findItem ( const QPoint & pos ) const
QIconViewItem * findItem ( const QString & text, ComparisonFlags
compare = BeginsWith ) const
virtual void selectAll ( bool select )
virtual void clearSelection ()
virtual void invertSelection ()
virtual void repaintItem ( QIconViewItem * item )
void repaintSelectedItems ()
void ensureItemVisible ( QIconViewItem * item )
QIconViewItem * findFirstVisibleItem ( const QRect & r ) const
QIconViewItem * findLastVisibleItem ( const QRect & r ) const
virtual void clear ()
virtual void setGridX ( int rx )
virtual void setGridY ( int ry )
int gridX () const
int gridY () const
virtual void setSpacing ( int sp )
int spacing () const
virtual void setItemTextPos ( ItemTextPos pos )
ItemTextPos itemTextPos () const
virtual void setItemTextBackground ( const QBrush & b )
QBrush itemTextBackground () const
virtual void setArrangement ( Arrangement am )
Arrangement arrangement () const
virtual void setResizeMode ( ResizeMode am )
ResizeMode resizeMode () const
virtual void setMaxItemWidth ( int w )
int maxItemWidth () const
virtual void setMaxItemTextLength ( int w )
int maxItemTextLength () const
virtual void setAutoArrange ( bool b )
bool autoArrange () const
virtual void setShowToolTips ( bool b )
bool showToolTips () const
void setSorting ( bool sort, bool ascending = TRUE )
bool sorting () const
bool sortDirection () const
virtual void setItemsMovable ( bool b )
bool itemsMovable () const
virtual void setWordWrapIconText ( bool b )
bool wordWrapIconText () const
virtual void sort ( bool ascending = TRUE )
bool isRenaming () const
Public Slots
virtual void arrangeItemsInGrid ( const QSize & grid, bool update =
TRUE )
virtual void arrangeItemsInGrid ( bool update = TRUE )
Signals
void selectionChanged ()
void selectionChanged ( QIconViewItem * item )
void currentChanged ( QIconViewItem * item )
void clicked ( QIconViewItem * item )
void clicked ( QIconViewItem * item, const QPoint & pos )
void pressed ( QIconViewItem * item )
void pressed ( QIconViewItem * item, const QPoint & pos )
void doubleClicked ( QIconViewItem * item )
void returnPressed ( QIconViewItem * item )
void rightButtonClicked ( QIconViewItem * item, const QPoint & pos )
void rightButtonPressed ( QIconViewItem * item, const QPoint & pos )
void mouseButtonPressed ( int button, QIconViewItem * item, const
QPoint & pos )
void mouseButtonClicked ( int button, QIconViewItem * item, const
QPoint & pos )
void contextMenuRequested ( QIconViewItem * item, const QPoint & pos )
void dropped ( QDropEvent * e, const QValueList<QIconDragItem> & lst )
void moved ()
void onItem ( QIconViewItem * item )
void onViewport ()
void itemRenamed ( QIconViewItem * item, const QString & name )
void itemRenamed ( QIconViewItem * item )
Properties
Arrangement arrangement - the arrangement mode of the icon view
bool autoArrange - whether the icon view rearranges its items when a
new item is inserted
uint count - the number of items in the icon view (read only)
int gridX - the horizontal grid of the icon view
int gridY - the vertical grid of the icon view
QBrush itemTextBackground - the brush to use when drawing the
background of an item's text
ItemTextPos itemTextPos - the position where the text of each item is
drawn
bool itemsMovable - whether the user is allowed to move items around in
the icon view
int maxItemTextLength - the maximum length (in characters) that an
item's text may have
int maxItemWidth - the maximum width that an item may have
ResizeMode resizeMode - the resize mode of the icon view
SelectionMode selectionMode - the selection mode of the icon view
bool showToolTips - whether the icon view will display a tool tip with
the complete text for any truncated item text
bool sortDirection - whether the sort direction for inserting new items
is ascending; (read only)
bool sorting - whether the icon view sorts on insertion (read only)
int spacing - the space in pixels between icon view items
bool wordWrapIconText - whether the item text will be word-wrapped if
it is too long
Protected Members
virtual void drawRubber ( QPainter * p )
virtual QDragObject * dragObject ()
virtual void startDrag ()
virtual void insertInGrid ( QIconViewItem * item )
virtual void drawBackground ( QPainter * p, const QRect & r )
void emitSelectionChanged ( QIconViewItem * i = 0 )
QIconViewItem * makeRowLayout ( QIconViewItem * begin, int & y, bool &
changed )
Protected Slots
virtual void doAutoScroll ()
virtual void adjustItems ()
virtual void slotUpdate ()
DESCRIPTION
The QIconView class provides an area with movable labelled icons.
A QIconView can display and manage a grid or other 2D layout of
labelled icons. Each labelled icon is a QIconViewItem. Items
(QIconViewItems) can be added or deleted at any time; items can be
moved within the QIconView. Single or multiple items can be selected.
Items can be renamed in-place. QIconView also supports drag and drop.
Each item contains a label string, a pixmap or picture (the icon
itself) and optionally a sort key. The sort key is used for sorting the
items and defaults to the label string. The label string can be
displayed below or to the right of the icon (see ItemTextPos).
The simplest way to create a QIconView is to create a QIconView object
and create some QIconViewItems with the QIconView as their parent, set
the icon view's geometry and show it. For example:
QIconView *iv = new QIconView( this );
QDir dir( path, "*.xpm" );
for ( uint i = 0; i < dir.count(); i++ ) {
(void) new QIconViewItem( iv, dir[i], QPixmap( path + dir[i] ) );
}
iv->resize( 600, 400 );
iv->show();
The QIconViewItem call passes a pointer to the QIconView we wish to
populate, along with the label text and a QPixmap.
When an item is inserted the QIconView allocates a position for it.
Existing items are rearranged if autoArrange() is TRUE. The default
arrangement is LeftToRight -- the QIconView fills up the left-most
column from top to bottom, then moves one column right and fills that
from top to bottom and so on. The arrangement can be modified with any
of the following approaches:
Call setArrangement(), e.g. with TopToBottom which will fill the top-
most row from left to right, then moves one row down and fills that row
from left to right and so on.
Construct each QIconViewItem using a constructor which allows you to
specify which item the new one is to follow.
Call setSorting() or sort() to sort the items.
The spacing between items is set with setSpacing(). Items can be laid
out using a fixed grid using setGridX() and setGridY(); by default the
QIconView calculates a grid dynamically. The position of items' label
text is set with setItemTextPos(). The text's background can be set
with setItemTextBackground(). The maximum width of an item and of its
text are set with setMaxItemWidth() and setMaxItemTextLength(). The
label text will be word-wrapped if it is too long; this is controlled
by setWordWrapIconText(). If the label text is truncated, the user can
still see the entire text in a tool tip if they hover the mouse over
the item. This is controlled with setShowToolTips().
Items which are selectable may be selected depending on the
SelectionMode; the default is Single. Because QIconView offers multiple
selection it must display keyboard focus and selection state
separately. Therefore there are functions to set the selection state of
an item (setSelected()) and to select which item displays keyboard
focus (setCurrentItem()). When multiple items may be selected the icon
view provides a rubberband, too.
When in-place renaming is enabled (it is disabled by default), the user
may change the item's label. They do this by selecting the item (single
clicking it or navigating to it with the arrow keys), then single
clicking it (or pressing F2), and entering their text. If no key has
been set with QIconViewItem::setKey() the new text will also serve as
the key. (See QIconViewItem::setRenameEnabled().)
You can control whether users can move items themselves with
setItemsMovable().
Because the internal structure used to store the icon view items is
linear, no iterator class is needed to iterate over all the items.
Instead we iterate by getting the first item from the icon view and
then each subsequent (QIconViewItem::nextItem()) from each item in
turn:
for ( QIconViewItem *item = iv->firstItem(); item; item = item->nextItem() )
do_something( item );
QIconView also provides currentItem(). You can search for an item using
findItem() (searching by position or for label text) and with
findFirstVisibleItem() and findLastVisibleItem(). The number of items
is returned by count(). An item can be removed from an icon view using
takeItem(); to delete an item use delete. All the items can be deleted
with clear().
The QIconView emits a wide range of useful signals, including
selectionChanged(), currentChanged(), clicked(), moved() and
itemRenamed().
Drag and DropQIconView supports the drag and drop of items within the QIconView
itself. It also supports the drag and drop of items out of or into the
QIconView and drag and drop onto items themselves. The drag and drop of
items outside the QIconView can be achieved in a simple way with basic
functionality, or in a more sophisticated way which provides more power
and control.
The simple approach to dragging items out of the icon view is to
subclass QIconView and reimplement QIconView::dragObject().
QDragObject *MyIconView::dragObject()
{
return new QTextDrag( currentItem()->text(), this );
}
In this example we create a QTextDrag object, (derived from
QDragObject), containing the item's label and return it as the drag
object. We could just as easily have created a QImageDrag from the
item's pixmap and returned that instead.
QIconViews and their QIconViewItems can also be the targets of drag and
drops. To make the QIconView itself able to accept drops connect to the
dropped() signal. When a drop occurs this signal will be emitted with a
QDragEvent and a QValueList of QIconDragItems. To make a QIconViewItem
into a drop target subclass QIconViewItem and reimplement
QIconViewItem::acceptDrop() and QIconViewItem::dropped().
bool MyIconViewItem::acceptDrop( const QMimeSource *mime ) const
{
if ( mime->provides( "text/plain" ) )
return TRUE;
return FALSE;
}
void MyIconViewItem::dropped( QDropEvent *evt, const QValueList<QIconDragItem>& )
{
QString label;
if ( QTextDrag::decode( evt, label ) )
setText( label );
}
See iconview/simple_dd/main.h and iconview/simple_dd/main.cpp for a
simple drag and drop example which demonstrates drag and drop between a
QIconView and a QListBox.
If you want to use extended drag-and-drop or have drag shapes drawn you
must take a more sophisticated approach.
The first part is starting drags -- you should use a QIconDrag (or a
class derived from it) for the drag object. In dragObject() create the
drag object, populate it with QIconDragItems and return it. Normally
such a drag should offer each selected item's data. So in dragObject()
you should iterate over all the items, and create a QIconDragItem for
each selected item, and append these items with QIconDrag::append() to
the QIconDrag object. You can use QIconDragItem::setData() to set the
data of each item that should be dragged. If you want to offer the data
in additional mime-types, it's best to use a class derived from
QIconDrag, which implements additional encoding and decoding functions.
When a drag enters the icon view, there is little to do. Simply connect
to the dropped() signal and reimplement QIconViewItem::acceptDrop() and
QIconViewItem::dropped(). If you've used a QIconDrag (or a subclass of
it) the second argument to the dropped signal contains a QValueList of
QIconDragItems -- you can access their data by calling
QIconDragItem::data() on each one.
For an example implementation of complex drag-and-drop look at the
fileiconview example (qt/examples/fileiconview).
See also QIconViewItem::setDragEnabled(),
QIconViewItem::setDropEnabled(), QIconViewItem::acceptDrop(),
QIconViewItem::dropped(), and Advanced Widgets.
[Image Omitted]
[Image Omitted]
Member Type Documentation
QIconView::Arrangement
This enum type determines in which direction the items flow when the
view runs out of space.
QIconView::LeftToRight - Items which don't fit into the view cause the
viewport to extend vertically (you get a vertical scrollbar).
QIconView::TopToBottom - Items which don't fit into the view cause the
viewport to extend horizontally (you get a horizontal scrollbar).
QIconView::ItemTextPos
This enum type specifies the position of the item text in relation to
the icon.
QIconView::Bottom - The text is drawn below the icon.
QIconView::Right - The text is drawn to the right of the icon.
QIconView::ResizeMode
This enum type is used to tell QIconView how it should treat the
positions of its icons when the widget is resized. The modes are:
QIconView::Fixed - The icons' positions are not changed.
QIconView::Adjust - The icons' positions are adjusted to be within the
new geometry, if possible.
QIconView::SelectionMode
This enumerated type is used by QIconView to indicate how it reacts to
selection by the user. It has four values:
QIconView::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. (The
application programmer can, using QIconView::clearSelection().)
QIconView::Multi - When the user selects an item, e.g. by navigating to
it with the keyboard arrow keys or by clicking it, the selection status
of that item is toggled and the other items are left alone. Also,
multiple items can be selected by dragging the mouse while the left
mouse button stays pressed.
QIconView::Extended - When the user selects an item 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. 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 stays pressed.
QIconView::NoSelection - Items cannot be selected.
To summarise: Single is a real single-selection icon view; Multi a real
multi-selection icon view; Extended is an icon view in which users can
select multiple items but usually want to select either just one or a
range of contiguous items; and NoSelection mode is for an icon view
where the user can look but not touch.
MEMBER FUNCTION DOCUMENTATIONQIconView::QIconView ( QWidget * parent = 0, const char * name = 0, WFlags f =
0 )
Constructs an empty icon view called name, with parent parent and using
the widget flags f.
QIconView::~QIconView () [virtual]
Destroys the icon view and deletes all items.
void QIconView::adjustItems () [virtual protected slot]
Adjusts the positions of the items to the geometry of the icon view.
void QIconView::arrangeItemsInGrid ( const QSize & grid, bool update = TRUE )
[virtual slot]
This variant uses grid instead of (gridX(), gridY()). If grid is
invalid (see QSize::isValid()), arrangeItemsInGrid() calculates a valid
grid itself and uses that.
If update is TRUE (the default) the viewport is repainted.
Example: fileiconview/qfileiconview.h.
void QIconView::arrangeItemsInGrid ( bool update = TRUE ) [virtual slot]
This is an overloaded member function, provided for convenience. It
behaves essentially like the above function.
Arranges all the items in the grid given by gridX() and gridY().
Even if sorting() is enabled, the items are not sorted by this
function. If you want to sort or rearrange the items, use
iconview->sort(iconview->sortDirection()).
If update is TRUE (the default), the viewport is repainted as well.
See also QIconView::gridX, QIconView::gridY, and QIconView::sort().
Arrangement QIconView::arrangement () const
Returns the arrangement mode of the icon view. See the "arrangement"
property for details.
bool QIconView::autoArrange () const
Returns TRUE if the icon view rearranges its items when a new item is
inserted; otherwise returns FALSE. See the "autoArrange" property for
details.
void QIconView::clear () [virtual]
Clears the icon view. All items are deleted.
void QIconView::clearSelection () [virtual]
Unselects all the items.
void QIconView::clicked ( QIconViewItem * item ) [signal]
This signal is emitted when the user clicks any mouse button. If item
is non-null, the cursor is on item. If item is null, the mouse cursor
isn't on any item.
See also mouseButtonClicked(), rightButtonClicked(), and pressed().
void QIconView::clicked ( QIconViewItem * item, const QPoint & pos ) [signal]
This is an overloaded member function, provided for convenience. It
behaves essentially like the above function.
This signal is emitted when the user clicks any mouse button on an icon
view item. item is a pointer to the item that has been clicked.
pos is the position of the mouse cursor in the global coordinate system
(QMouseEvent::globalPos()). (If the click's press and release differ by
a pixel or two, pos is the position at release time.)
See also mouseButtonClicked(), rightButtonClicked(), and pressed().
void QIconView::contextMenuRequested ( QIconViewItem * item, const QPoint &
pos ) [signal]
This signal is emitted when the user invokes a context menu with the
right mouse button or with special system keys, with item being the
item under the mouse cursor or the current item, respectively.
pos is the position for the context menu in the global coordinate
system.
uint QIconView::count () const
Returns the number of items in the icon view. See the "count" property
for details.
void QIconView::currentChanged ( QIconViewItem * item ) [signal]
This signal is emitted when a new item becomes current. item is the new
current item (or 0 if no item is now current).
See also currentItem().
QIconViewItem * QIconView::currentItem () const
Returns a pointer to the current item of the icon view, or 0 if no item
is current.
See also setCurrentItem(), firstItem(), and lastItem().
void QIconView::doAutoScroll () [virtual protected slot]
Performs autoscrolling when selecting multiple icons with the rubber
band.
void QIconView::doubleClicked ( QIconViewItem * item ) [signal]
This signal is emitted when the user double-clicks on item.
QDragObject * QIconView::dragObject () [virtual protected]
Returns the QDragObject that should be used for drag-and-drop. This
function is called by the icon view when starting a drag to get the
dragobject that should be used for the drag. Subclasses may reimplement
this.
See also QIconDrag.
Examples:
void QIconView::drawBackground ( QPainter * p, const QRect & r ) [virtual
protected]
This function is called to draw the rectangle r of the background using
the painter p.
The default implementation fills r with the viewport's
backgroundBrush(). Subclasses may reimplement this to draw custom
backgrounds.
See also contentsX, contentsY, and drawContents().
void QIconView::drawRubber ( QPainter * p ) [virtual protected]
Draws the rubber band using the painter p.
void QIconView::dropped ( QDropEvent * e, const QValueList<QIconDragItem> &
lst ) [signal]
This signal is emitted when a drop event occurs in the viewport (but
not on any icon) which the icon view itself can't handle.
e provides all the information about the drop. If the drag object of
the drop was a QIconDrag, lst contains the list of the dropped items.
You can get the data using QIconDragItem::data() on each item. If the
lst is empty, i.e. the drag was not a QIconDrag, you have to decode the
data in e and work with that.
Note QIconViewItems may be drop targets; if a drop event occurs on an
item the item handles the drop.
Examples:
void QIconView::emitSelectionChanged ( QIconViewItem * i = 0 ) [protected]
Emits a signal to indicate selection changes. i is the QIconViewItem
that was selected or de-selected.
You should never need to call this function.
void QIconView::ensureItemVisible ( QIconViewItem * item )
Makes sure that item is entirely visible. If necessary,
ensureItemVisible() scrolls the icon view.
See also ensureVisible().
QIconViewItem * QIconView::findFirstVisibleItem ( const QRect & r ) const
Finds the first item whose bounding rectangle overlaps r and returns a
pointer to that item. r is given in content coordinates. Returns 0 if
no item overlaps r.
If you want to find all items that touch r, you will need to use this
function and nextItem() in a loop ending at findLastVisibleItem() and
test QIconViewItem::rect() for each of these items.
See also findLastVisibleItem() and QIconViewItem::rect().
QIconViewItem * QIconView::findItem ( const QPoint & pos ) const
Returns a pointer to the item that contains point pos, which is given
in contents coordinates, or 0 if no item contains point pos.
QIconViewItem * QIconView::findItem ( const QString & text, ComparisonFlags
compare = BeginsWith ) const
This is an overloaded member function, provided for convenience. It
behaves essentially like the above function.
Returns a pointer to the first item whose text begins with text, or 0
if no such item could be found. Use the compare flag to control the
comparison behaviour. (See Qt::StringComparisonMode.)
QIconViewItem * QIconView::findLastVisibleItem ( const QRect & r ) const
Finds the last item whose bounding rectangle overlaps r and returns a
pointer to that item. r is given in content coordinates. Returns 0 if
no item overlaps r.
See also findFirstVisibleItem().
QIconViewItem * QIconView::firstItem () const
Returns a pointer to the first item of the icon view, or 0 if there are
no items in the icon view.
See also lastItem() and currentItem().
int QIconView::gridX () const
Returns the horizontal grid of the icon view. See the "gridX" property
for details.
int QIconView::gridY () const
Returns the vertical grid of the icon view. See the "gridY" property
for details.
int QIconView::index ( const QIconViewItem * item ) const
Returns the index of item, or -1 if item doesn't exist in this icon
view.
void QIconView::insertInGrid ( QIconViewItem * item ) [virtual protected]
Inserts the QIconViewItem item in the icon view's grid. You should
never need to call this function. Instead, insert QIconViewItems by
creating them with a pointer to the QIconView that they are to be
inserted into.
void QIconView::insertItem ( QIconViewItem * item, QIconViewItem * after = 0L
) [virtual]
Inserts the icon view item item after after. If after is 0, item is
appended after the last item.
You should never need to call this function. Instead create
QIconViewItem's and associate them with your icon view like this:
(void) new QIconViewItem( myIconview, "The text of the item", aPixmap );
void QIconView::invertSelection () [virtual]
Inverts the selection. Works only in Multi and Extended selection mode.
bool QIconView::isRenaming () const
Returns TRUE if an iconview item is being renamed; otherwise returns
FALSE.
void QIconView::itemRenamed ( QIconViewItem * item, const QString & name )
[signal]
This signal is emitted when item has been renamed to name, usually by
in-place renaming.
See also QIconViewItem::setRenameEnabled() and QIconViewItem::rename().
void QIconView::itemRenamed ( QIconViewItem * item ) [signal]
This is an overloaded member function, provided for convenience. It
behaves essentially like the above function.
This signal is emitted when item has been renamed, usually by in-place
renaming.
See also QIconViewItem::setRenameEnabled() and QIconViewItem::rename().
QBrush QIconView::itemTextBackground () const
Returns the brush to use when drawing the background of an item's text.
See the "itemTextBackground" property for details.
ItemTextPos QIconView::itemTextPos () const
Returns the position where the text of each item is drawn. See the
"itemTextPos" property for details.
bool QIconView::itemsMovable () const
Returns TRUE if the user is allowed to move items around in the icon
view; otherwise returns FALSE. See the "itemsMovable" property for
details.
QIconViewItem * QIconView::lastItem () const
Returns a pointer to the last item of the icon view, or 0 if there are
no items in the icon view.
See also firstItem() and currentItem().
QIconViewItem * QIconView::makeRowLayout ( QIconViewItem * begin, int & y,
bool & changed ) [protected]
Lays out a row of icons (if Arrangement == TopToBottom this is a
column). Starts laying out with the item begin. y is the starting
coordinate. Returns the last item of the row (column) and sets the new
starting coordinate to y. The changed parameter is used internally.
Warning: This function may be made private in a future version of Qt.
We do not recommend calling it.
int QIconView::maxItemTextLength () const
Returns the maximum length (in characters) that an item's text may
have. See the "maxItemTextLength" property for details.
int QIconView::maxItemWidth () const
Returns the maximum width that an item may have. See the "maxItemWidth"
property for details.
void QIconView::mouseButtonClicked ( int button, QIconViewItem * item, const
QPoint & pos ) [signal]
This signal is emitted when the user clicks mouse button button. If
item is non-null, the cursor is on item. If item is null, the mouse
cursor isn't on any item.
pos is the position of the mouse cursor in the global coordinate system
(QMouseEvent::globalPos()). (If the click's press and release differ by
a pixel or two, pos is the position at release time.)
See also mouseButtonPressed(), rightButtonClicked(), and clicked().
void QIconView::mouseButtonPressed ( int button, QIconViewItem * item, const
QPoint & pos ) [signal]
This signal is emitted when the user presses mouse button button. If
item is non-null, the cursor is on item. If item is null, the mouse
cursor isn't on any item.
pos is the position of the mouse cursor in the global coordinate system
(QMouseEvent::globalPos()).
See also rightButtonClicked() and pressed().
void QIconView::moved () [signal]
This signal is emitted after successfully dropping one (or more) items
of the icon view. If the items should be removed, it's best to do so in
a slot connected to this signal.
Example: iconview/main.cpp.
void QIconView::onItem ( QIconViewItem * item ) [signal]
This signal is emitted when the user moves the mouse cursor onto an
item, similar to the QWidget::enterEvent() function.
void QIconView::onViewport () [signal]
This signal is emitted when the user moves the mouse cursor from an
item to an empty part of the icon view.
See also onItem().
void QIconView::pressed ( QIconViewItem * item ) [signal]
This signal is emitted when the user presses any mouse button. If item
is non-null, the cursor is on item. If item is null, the mouse cursor
isn't on any item.
See also mouseButtonPressed(), rightButtonPressed(), and clicked().
void QIconView::pressed ( QIconViewItem * item, const QPoint & pos ) [signal]
This is an overloaded member function, provided for convenience. It
behaves essentially like the above function.
This signal is emitted when the user presses any mouse button. If item
is non-null, the cursor is on item. If item is null, the mouse cursor
isn't on any item.
pos is the position of the mouse cursor in the global coordinate system
(QMouseEvent::globalPos()). (If the click's press and release differ by
a pixel or two, pos is the position at release time.)
See also mouseButtonPressed(), rightButtonPressed(), and clicked().
void QIconView::repaintItem ( QIconViewItem * item ) [virtual]
Repaints the item.
void QIconView::repaintSelectedItems ()
Repaints the selected items.
ResizeMode QIconView::resizeMode () const
Returns the resize mode of the icon view. See the "resizeMode" property
for details.
void QIconView::returnPressed ( QIconViewItem * item ) [signal]
This signal is emitted if the user presses the Return or Enter key.
item is the currentItem() at the time of the keypress.
void QIconView::rightButtonClicked ( QIconViewItem * item, const QPoint & pos
) [signal]
This signal is emitted when the user clicks the right mouse button. If
item is non-null, the cursor is on item. If item is null, the mouse
cursor isn't on any item.
pos is the position of the mouse cursor in the global coordinate system
(QMouseEvent::globalPos()). (If the click's press and release differ by
a pixel or two, pos is the position at release time.)
See also rightButtonPressed(), mouseButtonClicked(), and clicked().
void QIconView::rightButtonPressed ( QIconViewItem * item, const QPoint & pos
) [signal]
This signal is emitted when the user presses the right mouse button. If
item is non-null, the cursor is on item. If item is null, the mouse
cursor isn't on any item.
pos is the position of the mouse cursor in the global coordinate system
(QMouseEvent::globalPos()).
void QIconView::selectAll ( bool select ) [virtual]
In Multi and Extended modes, this function sets all items to be
selected if select is TRUE, and to be unselected if select is FALSE.
In Single and NoSelection modes, this function only changes the
selection status of currentItem().
void QIconView::selectionChanged () [signal]
This signal is emitted when the selection has been changed. It's
emitted in each selection mode.
void QIconView::selectionChanged ( QIconViewItem * item ) [signal]
This is an overloaded member function, provided for convenience. It
behaves essentially like the above function.
This signal is emitted when the selection changes. item is the newly
selected item. This signal is emitted only in single selection mode.
SelectionMode QIconView::selectionMode () const
Returns the selection mode of the icon view. See the "selectionMode"
property for details.
void QIconView::setArrangement ( Arrangement am ) [virtual]
Sets the arrangement mode of the icon view to am. See the "arrangement"
property for details.
void QIconView::setAutoArrange ( bool b ) [virtual]
Sets whether the icon view rearranges its items when a new item is
inserted to b. See the "autoArrange" property for details.
void QIconView::setCurrentItem ( QIconViewItem * item ) [virtual]
Makes item the new current item of the icon view.
void QIconView::setGridX ( int rx ) [virtual]
Sets the horizontal grid of the icon view to rx. See the "gridX"
property for details.
void QIconView::setGridY ( int ry ) [virtual]
Sets the vertical grid of the icon view to ry. See the "gridY" property
for details.
void QIconView::setItemTextBackground ( const QBrush & b ) [virtual]
Sets the brush to use when drawing the background of an item's text to
b. See the "itemTextBackground" property for details.
void QIconView::setItemTextPos ( ItemTextPos pos ) [virtual]
Sets the position where the text of each item is drawn to pos. See the
"itemTextPos" property for details.
void QIconView::setItemsMovable ( bool b ) [virtual]
Sets whether the user is allowed to move items around in the icon view
to b. See the "itemsMovable" property for details.
void QIconView::setMaxItemTextLength ( int w ) [virtual]
Sets the maximum length (in characters) that an item's text may have to
w. See the "maxItemTextLength" property for details.
void QIconView::setMaxItemWidth ( int w ) [virtual]
Sets the maximum width that an item may have to w. See the
"maxItemWidth" property for details.
void QIconView::setResizeMode ( ResizeMode am ) [virtual]
Sets the resize mode of the icon view to am. See the "resizeMode"
property for details.
void QIconView::setSelected ( QIconViewItem * item, bool s, bool cb = FALSE )
[virtual]
Selects or unselects item depending on s, and may also unselect other
items, depending on QIconView::selectionMode() and cb.
If s is FALSE, item is unselected.
If s is TRUE and QIconView::selectionMode() is Single, item is
selected, and the item which was selected is unselected.
If s is TRUE and QIconView::selectionMode() is Extended, item is
selected. If cb is TRUE, the selection state of the icon view's other
items is left unchanged. If cb is FALSE (the default) all other items
are unselected.
If s is TRUE and QIconView::selectionMode() is Multi item is selected.
Note that cb is used only if QIconView::selectionMode() is Extended. cb
defaults to FALSE.
All items whose selection status is changed repaint themselves.
void QIconView::setSelectionMode ( SelectionMode m ) [virtual]
Sets the selection mode of the icon view to m. See the "selectionMode"
property for details.
void QIconView::setShowToolTips ( bool b ) [virtual]
Sets whether the icon view will display a tool tip with the complete
text for any truncated item text to b. See the "showToolTips" property
for details.
void QIconView::setSorting ( bool sort, bool ascending = TRUE )
If sort is TRUE, this function sets the icon view to sort items when a
new item is inserted. If sort is FALSE, the icon view will not be
sorted.
Note that autoArrange() must be TRUE for sorting to take place.
If ascending is TRUE (the default), items are sorted in ascending
order. If ascending is FALSE, items are sorted in descending order.
QIconViewItem::compare() is used to compare pairs of items. The sorting
is based on the items' keys; these default to the items' text unless
specifically set to something else.
See also QIconView::autoArrange, QIconView::autoArrange, sortDirection,
sort(), and QIconViewItem::setKey().
void QIconView::setSpacing ( int sp ) [virtual]
Sets the space in pixels between icon view items to sp. See the
"spacing" property for details.
void QIconView::setWordWrapIconText ( bool b ) [virtual]
Sets whether the item text will be word-wrapped if it is too long to b.
See the "wordWrapIconText" property for details.
bool QIconView::showToolTips () const
Returns TRUE if the icon view will display a tool tip with the complete
text for any truncated item text; otherwise returns FALSE. See the
"showToolTips" property for details.
void QIconView::slotUpdate () [virtual protected slot]
This slot is used for a slightly-delayed update.
The icon view is not redrawn immediately after inserting a new item but
after a very small delay using a QTimer. This means that when many
items are inserted in a loop the icon view is probably redrawn only
once at the end of the loop. This makes the insertions both flicker-
free and faster.
void QIconView::sort ( bool ascending = TRUE ) [virtual]
Sorts and rearranges all the items in the icon view. If ascending is
TRUE, the items are sorted in increasing order, otherwise they are
sorted in decreasing order.
QIconViewItem::compare() is used to compare pairs of items. The sorting
is based on the items' keys; these default to the items' text unless
specifically set to something else.
Note that this function sets the sort order to ascending.
See also QIconViewItem::key(), QIconViewItem::setKey(),
QIconViewItem::compare(), QIconView::setSorting(), and
QIconView::sortDirection.
bool QIconView::sortDirection () const
Returns TRUE if the sort direction for inserting new items is
ascending;; otherwise returns FALSE. See the "sortDirection" property
for details.
bool QIconView::sorting () const
Returns TRUE if the icon view sorts on insertion; otherwise returns
FALSE. See the "sorting" property for details.
int QIconView::spacing () const
Returns the space in pixels between icon view items. See the "spacing"
property for details.
void QIconView::startDrag () [virtual protected]
Starts a drag.
void QIconView::takeItem ( QIconViewItem * item ) [virtual]
Takes the icon view item item out of the icon view and causes an update
of the screen display. The item is not deleted. You should normally not
need to call this function because QIconViewItem::~QIconViewItem()
calls it. The normal way to delete an item is to delete it.
bool QIconView::wordWrapIconText () const
Returns TRUE if the item text will be word-wrapped if it is too long;
otherwise returns FALSE. See the "wordWrapIconText" property for
details.
Property Documentation
Arrangement arrangement
This property holds the arrangement mode of the icon view.
This can be LeftToRight or TopToBottom. The default is LeftToRight.
Set this property's value with setArrangement() and get this property's
value with arrangement().
bool autoArrange
This property holds whether the icon view rearranges its items when a
new item is inserted.
The default is TRUE.
Note that if the icon view is not visible at the time of insertion,
QIconView defers all position-related work until it is shown and then
calls arrangeItemsInGrid().
Set this property's value with setAutoArrange() and get this property's
value with autoArrange().
uint count
This property holds the number of items in the icon view.
Get this property's value with count().
int gridX
This property holds the horizontal grid of the icon view.
If the value is -1, (the default), QIconView computes suitable column
widths based on the icon view's contents.
Note that setting a grid width overrides setMaxItemWidth().
Set this property's value with setGridX() and get this property's value
with gridX().
int gridY
This property holds the vertical grid of the icon view.
If the value is -1, (the default), QIconView computes suitable column
heights based on the icon view's contents.
Set this property's value with setGridY() and get this property's value
with gridY().
QBrush itemTextBackground
This property holds the brush to use when drawing the background of an
item's text.
By default this brush is set to NoBrush, meaning that only the normal
icon view background is used.
Set this property's value with setItemTextBackground() and get this
property's value with itemTextBackground().
ItemTextPos itemTextPos
This property holds the position where the text of each item is drawn.
Valid values are Bottom or Right. The default is Bottom.
Set this property's value with setItemTextPos() and get this property's
value with itemTextPos().
bool itemsMovable
This property holds whether the user is allowed to move items around in
the icon view.
The default is TRUE.
Set this property's value with setItemsMovable() and get this
property's value with itemsMovable().
int maxItemTextLength
This property holds the maximum length (in characters) that an item's
text may have.
The default is 255 characters.
Set this property's value with setMaxItemTextLength() and get this
property's value with maxItemTextLength().
int maxItemWidth
This property holds the maximum width that an item may have.
The default is 100 pixels.
Note that if the gridX() value is set QIconView will ignore this
property.
Set this property's value with setMaxItemWidth() and get this
property's value with maxItemWidth().
ResizeMode resizeMode
This property holds the resize mode of the icon view.
This can be Fixed or Adjust. The default is Fixed. See ResizeMode.
Set this property's value with setResizeMode() and get this property's
value with resizeMode().
SelectionMode selectionMode
This property holds the selection mode of the icon view.
This can be Single (the default), Extended, Multi or NoSelection.
Set this property's value with setSelectionMode() and get this
property's value with selectionMode().
bool showToolTips
This property holds whether the icon view will display a tool tip with
the complete text for any truncated item text.
The default is TRUE. Note that this has no effect if
setWordWrapIconText() is TRUE, as it is by default.
Set this property's value with setShowToolTips() and get this
property's value with showToolTips().
bool sortDirection
This property holds whether the sort direction for inserting new items
is ascending;.
The default is TRUE (i.e. ascending). This sort direction is only
meaningful if both sorting() and autoArrange() are TRUE.
To set the sort direction, use setSorting()
Get this property's value with sortDirection().
bool sorting
This property holds whether the icon view sorts on insertion.
The default is FALSE, i.e. no sorting on insertion.
To set the sorting, use setSorting().
Get this property's value with sorting().
int spacing
This property holds the space in pixels between icon view items.
The default is 5 pixels.
Negative values for spacing are illegal.
Set this property's value with setSpacing() and get this property's
value with spacing().
bool wordWrapIconText
This property holds whether the item text will be word-wrapped if it is
too long.
The default is TRUE.
If this property is FALSE, icon text that is too long is truncated, and
an ellipsis (...) appended to indicate that truncation has occurred.
The full text can still be seen by the user if they hover the mouse
because the full text is shown in a tooltip; see setShowToolTips().
Set this property's value with setWordWrapIconText() and get this
property's value with wordWrapIconText().
SEE ALSO
http://doc.trolltech.com/qiconview.html
http://www.trolltech.com/faq/tech.html
COPYRIGHT
Copyright 1992-2007 Trolltech ASA, http://www.trolltech.com. See the
license file included in the distribution for a complete license
statement.
AUTHOR
Generated automatically from the source code.
BUGS
If you find a bug in Qt, please report it as described in
http://doc.trolltech.com/bughowto.html. Good bug reports help us to
help you. Thank you.
The definitive Qt documentation is provided in HTML format; it is
located at $QTDIR/doc/html and can be read using Qt Assistant or with a
web browser. This man page is provided as a convenience for those users
who prefer man pages, although this format is not officially supported
by Trolltech.
If you find errors in this manual page, please report them to qt-
bugs@trolltech.com. Please include the name of the manual page
(qiconview.3qt) and the Qt version (3.3.8).
Trolltech AS 2 February 2007 QIconView(3qt)
