QCursor(3qt)QCursor(3qt)NAME
QCursor - Mouse cursor with an arbitrary shape
SYNOPSIS
#include <qcursor.h>
Inherits Qt.
Public Members
QCursor ()
QCursor ( int shape )
QCursor ( const QBitmap & bitmap, const QBitmap & mask, int hotX = -1,
int hotY = -1 )
QCursor ( const QPixmap & pixmap, int hotX = -1, int hotY = -1 )
QCursor ( const QCursor & c )
~QCursor ()
QCursor & operator= ( const QCursor & c )
int shape () const
void setShape ( int shape )
const QBitmap * bitmap () const
const QBitmap * mask () const
QPoint hotSpot () const
HCURSOR handle () const
QCursor ( HCURSOR handle )
HANDLE handle () const
Static Public Members
QPoint pos ()
void setPos ( int x, int y )
void setPos ( const QPoint & )
void initialize ()
void cleanup ()
RELATED FUNCTION DOCUMENTATION
QDataStream & operator<< ( QDataStream & s, const QCursor & c )
QDataStream & operator>> ( QDataStream & s, QCursor & c )
DESCRIPTION
The QCursor class provides a mouse cursor with an arbitrary shape.
This class is mainly used to create mouse cursors that are associated
with particular widgets and to get and set the position of the mouse
cursor.
Qt has a number of standard cursor shapes, but you can also make custom
cursor shapes based on a QBitmap, a mask and a hotspot.
To associate a cursor with a widget, use QWidget::setCursor(). To
associate a cursor with all widgets (normally for a short period of
time), use QApplication::setOverrideCursor().
To set a cursor shape use QCursor::setShape() or use the QCursor
constructor which takes the shape as argument, or you can use one of
the predefined cursors defined in the CursorShape enum.
If you want to create a cursor with your own bitmap, either use the
QCursor constructor which takes a bitmap and a mask or the constructor
which takes a pixmap as arguments.
To set or get the position of the mouse cursor use the static methods
QCursor::pos() and QCursor::setPos().
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See also QWidget, GUI Design Handbook: Cursors, Widget Appearance and
Style, and Implicitly and Explicitly Shared Classes.
On X11, Qt supports the Xcursor library, which allows for full color
icon themes. The table below shows the cursor name used for each
Qt::CursorShape value. If a cursor cannot be found using the name shown
below, a standard X11 cursor will be used instead. Note: X11 does not
provide appropriate cursors for all possible Qt::CursorShape values. It
is possible that some cursors will be taken from the Xcursor theme,
while others will use an internal bitmap cursor.
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MEMBER FUNCTION DOCUMENTATIONQCursor::QCursor ()
Constructs a cursor with the default arrow shape.
QCursor::QCursor ( int shape )
Constructs a cursor with the specified shape.
See CursorShape for a list of shapes.
See also setShape().
QCursor::QCursor ( const QBitmap & bitmap, const QBitmap & mask, int hotX =
-1, int hotY = -1 )
Constructs a custom bitmap cursor.
bitmap and mask make up the bitmap. hotX and hotY define the cursor's
hot spot.
If hotX is negative, it is set to the bitmap().width()/2. If hotY is
negative, it is set to the bitmap().height()/2.
The cursor bitmap (B) and mask (M) bits are combined like this:
B=1 and M=1 gives black.
B=0 and M=1 gives white.
B=0 and M=0 gives transparent.
B=1 and M=0 gives an undefined result.
Use the global Qt color color0 to draw 0-pixels and color1 to draw
1-pixels in the bitmaps.
Valid cursor sizes depend on the display hardware (or the underlying
window system). We recommend using 32x32 cursors, because this size is
supported on all platforms. Some platforms also support 16x16, 48x48
and 64x64 cursors.
See also QBitmap::QBitmap() and QBitmap::setMask().
QCursor::QCursor ( const QPixmap & pixmap, int hotX = -1, int hotY = -1 )
Constructs a custom pixmap cursor.
pixmap is the image. It is usual to give it a mask (set using
QPixmap::setMask()). hotX and hotY define the cursor's hot spot.
If hotX is negative, it is set to the pixmap().width()/2. If hotY is
negative, it is set to the pixmap().height()/2.
Valid cursor sizes depend on the display hardware (or the underlying
window system). We recommend using 32x32 cursors, because this size is
supported on all platforms. Some platforms also support 16x16, 48x48
and 64x64 cursors.
Currently, only black-and-white pixmaps can be used.
See also QPixmap::QPixmap() and QPixmap::setMask().
QCursor::QCursor ( const QCursor & c )
Constructs a copy of the cursor c.
QCursor::QCursor ( HCURSOR handle )
Creates a cursor with the specified window system handle handle.
Warning: Portable in principle, but if you use it you are probably
about to do something non-portable. Be careful.
QCursor::~QCursor ()
Destroys the cursor.
const QBitmap * QCursor::bitmap () const
Returns the cursor bitmap, or 0 if it is one of the standard cursors.
void QCursor::cleanup () [static]
Internal function that deinitializes the predefined cursors. This
function is called from the QApplication destructor.
See also initialize().
HANDLE QCursor::handle () const
Returns the window system cursor handle.
Warning: Portable in principle, but if you use it you are probably
about to do something non-portable. Be careful.
QPoint QCursor::hotSpot () const
Returns the cursor hot spot, or (0, 0) if it is one of the standard
cursors.
void QCursor::initialize () [static]
Internal function that initializes the predefined cursors. This
function is called from the QApplication constructor.
See also cleanup().
const QBitmap * QCursor::mask () const
Returns the cursor bitmap mask, or 0 if it is one of the standard
cursors.
QCursor & QCursor::operator= ( const QCursor & c )
Assigns c to this cursor and returns a reference to this cursor.
QPoint QCursor::pos () [static]
Returns the position of the cursor (hot spot) in global screen
coordinates.
You can call QWidget::mapFromGlobal() to translate it to widget
coordinates.
See also setPos(), QWidget::mapFromGlobal(), and
QWidget::mapToGlobal().
Examples:
void QCursor::setPos ( int x, int y ) [static]
Moves the cursor (hot spot) to the global screen position (x, y).
You can call QWidget::mapToGlobal() to translate widget coordinates to
global screen coordinates.
See also pos(), QWidget::mapFromGlobal(), and QWidget::mapToGlobal().
void QCursor::setPos ( const QPoint & ) [static]
This is an overloaded member function, provided for convenience. It
behaves essentially like the above function.
void QCursor::setShape ( int shape )
Sets the cursor to the shape identified by shape.
See CursorShape for the list of cursor shapes.
See also shape().
int QCursor::shape () const
Returns the cursor shape identifier. The return value is one of the
CursorShape enum values (cast to an int).
See also setShape().
RELATED FUNCTION DOCUMENTATIONQDataStream & operator<< ( QDataStream & s, const QCursor & c )
Writes the cursor c to the stream s.
See also Format of the QDataStream operators.
QDataStream & operator>> ( QDataStream & s, QCursor & c )
Reads a cursor from the stream s and sets c to the read data.
See also Format of the QDataStream operators.
SEE ALSO
http://doc.trolltech.com/qcursor.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.
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Trolltech AS 2 February 2007 QCursor(3qt)