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java.lang.Objectcom.trolltech.qt.internal.QSignalEmitterInternal
com.trolltech.qt.QSignalEmitter
com.trolltech.qt.QtJambiObject
com.trolltech.qt.gui.QCursor
public class QCursor
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 Qt::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()
.
Note: It is possible to create a QCursor
before QApplication
, but it is not useful except as a place-holder for a real QCursor
created after QApplication
. Attempting to use a QCursor
that was created before QApplication
will result in a crash.A Note for X11 Users
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.
Qt::CursorShape Value | Qt::CursorShape Value | ||||
---|---|---|---|---|---|
![]() | Qt::ArrowCursor | left_ptr | ![]() | Qt::SizeVerCursor | size_ver |
![]() | Qt::UpArrowCursor | up_arrow | ![]() | Qt::SizeHorCursor | size_hor |
![]() | Qt::CrossCursor | cross | ![]() | Qt::SizeBDiagCursor | size_bdiag |
![]() | Qt::IBeamCursor | ibeam | ![]() | Qt::SizeFDiagCursor | size_fdiag |
![]() | Qt::WaitCursor | wait | ![]() | Qt::SizeAllCursor | size_all |
![]() | Qt::BusyCursor | left_ptr_watch | ![]() | Qt::SplitVCursor | split_v |
![]() | Qt::ForbiddenCursor | forbidden | ![]() | Qt::SplitHCursor | split_h |
![]() | Qt::PointingHandCursor | pointing_hand | ![]() | Qt::OpenHandCursor | openhand |
![]() | Qt::WhatsThisCursor | whats_this | ![]() | Qt::ClosedHandCursor | closedhand |
QWidget
, and GUI Design Handbook: Cursors.
Nested Class Summary |
---|
Nested classes/interfaces inherited from class com.trolltech.qt.QSignalEmitter |
---|
QSignalEmitter.AbstractSignal, QSignalEmitter.Signal0, QSignalEmitter.Signal1, QSignalEmitter.Signal2, QSignalEmitter.Signal3, QSignalEmitter.Signal4, QSignalEmitter.Signal5, QSignalEmitter.Signal6, QSignalEmitter.Signal7, QSignalEmitter.Signal8, QSignalEmitter.Signal9 |
Nested classes/interfaces inherited from class com.trolltech.qt.internal.QSignalEmitterInternal |
---|
com.trolltech.qt.internal.QSignalEmitterInternal.AbstractSignalInternal |
Field Summary |
---|
Fields inherited from class com.trolltech.qt.internal.QSignalEmitterInternal |
---|
currentSender |
Constructor Summary | |
---|---|
QCursor()
Constructs a cursor with the default arrow shape. |
|
QCursor(QBitmap bitmap,
QBitmap mask)
Constructs a custom bitmap cursor. |
|
QCursor(QBitmap bitmap,
QBitmap mask,
int hotX)
Constructs a custom bitmap cursor. |
|
QCursor(QBitmap bitmap,
QBitmap mask,
int hotX,
int hotY)
Constructs a custom bitmap cursor. |
|
QCursor(QCursor cursor)
Constructs a copy of the cursor c. |
|
QCursor(QPixmap pixmap)
Constructs a custom pixmap cursor. |
|
QCursor(QPixmap pixmap,
int hotX)
Constructs a custom pixmap cursor. |
|
QCursor(QPixmap pixmap,
int hotX,
int hotY)
Constructs a custom pixmap cursor. |
|
QCursor(Qt.CursorShape shape)
Constructs a cursor with the specified shape. |
Method Summary | |
---|---|
QBitmap |
bitmap()
Returns the cursor bitmap, or null if it is one of the standard cursors. |
QCursor |
clone()
This method is reimplemented for internal reasons |
QPoint |
hotSpot()
Returns the cursor hot spot, or (0, 0) if it is one of the standard cursors. |
QBitmap |
mask()
Returns the cursor bitmap mask, or null if it is one of the standard cursors. |
QPixmap |
pixmap()
Returns the cursor pixmap. |
static QPoint |
pos()
Returns the position of the cursor (hot spot) in global screen coordinates. |
void |
readFrom(QDataStream inS)
|
static void |
setPos(int x,
int y)
Moves the cursor (hot spot) to the global screen position (x, y). |
static void |
setPos(QPoint p)
Moves the cursor (hot spot) to the global screen position at point p. |
void |
setShape(Qt.CursorShape newShape)
Sets the cursor to the shape identified by shape. |
Qt.CursorShape |
shape()
Returns the cursor shape identifier. |
void |
writeTo(QDataStream outS)
|
Methods inherited from class com.trolltech.qt.QtJambiObject |
---|
dispose, disposed, equals, finalize, reassignNativeResources, tr, tr, tr |
Methods inherited from class com.trolltech.qt.QSignalEmitter |
---|
blockSignals, disconnect, disconnect, signalsBlocked, signalSender, thread |
Methods inherited from class com.trolltech.qt.internal.QSignalEmitterInternal |
---|
__qt_signalInitialization |
Methods inherited from class java.lang.Object |
---|
getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Methods inherited from interface com.trolltech.qt.QtJambiInterface |
---|
disableGarbageCollection, nativeId, nativePointer, reenableGarbageCollection, setJavaOwnership |
Constructor Detail |
---|
public QCursor()
public QCursor(Qt.CursorShape shape)
See Qt::CursorShape
for a list of shapes.
setShape()
.
public QCursor(QBitmap bitmap, QBitmap mask, int hotX)
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:
Qt::color0
to draw 0-pixels and Qt::color1
to draw 1-pixels in the bitmaps. Valid cursor sizes depend on the display hardware (or the underlying window system). We recommend using 32 x 32 cursors, because this size is supported on all platforms. Some platforms also support 16 x 16, 48 x 48, and 64 x 64 cursors.
Note: On Windows CE, the cursor size is fixed. If the pixmap is bigger than the system size, it will be scaled.
QBitmap::setMask()
.
public QCursor(QBitmap bitmap, QBitmap mask)
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:
Qt::color0
to draw 0-pixels and Qt::color1
to draw 1-pixels in the bitmaps. Valid cursor sizes depend on the display hardware (or the underlying window system). We recommend using 32 x 32 cursors, because this size is supported on all platforms. Some platforms also support 16 x 16, 48 x 48, and 64 x 64 cursors.
Note: On Windows CE, the cursor size is fixed. If the pixmap is bigger than the system size, it will be scaled.
QBitmap::setMask()
.
public QCursor(QBitmap bitmap, QBitmap mask, int hotX, int hotY)
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:
Qt::color0
to draw 0-pixels and Qt::color1
to draw 1-pixels in the bitmaps. Valid cursor sizes depend on the display hardware (or the underlying window system). We recommend using 32 x 32 cursors, because this size is supported on all platforms. Some platforms also support 16 x 16, 48 x 48, and 64 x 64 cursors.
Note: On Windows CE, the cursor size is fixed. If the pixmap is bigger than the system size, it will be scaled.
QBitmap::setMask()
.
public QCursor(QCursor cursor)
public QCursor(QPixmap pixmap, int hotX)
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 32 x 32 cursors, because this size is supported on all platforms. Some platforms also support 16 x 16, 48 x 48, and 64 x 64 cursors.
Note: On Windows CE, the cursor size is fixed. If the pixmap is bigger than the system size, it will be scaled.
QPixmap::setMask()
.
public QCursor(QPixmap pixmap)
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 32 x 32 cursors, because this size is supported on all platforms. Some platforms also support 16 x 16, 48 x 48, and 64 x 64 cursors.
Note: On Windows CE, the cursor size is fixed. If the pixmap is bigger than the system size, it will be scaled.
QPixmap::setMask()
.
public QCursor(QPixmap pixmap, int hotX, int hotY)
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 32 x 32 cursors, because this size is supported on all platforms. Some platforms also support 16 x 16, 48 x 48, and 64 x 64 cursors.
Note: On Windows CE, the cursor size is fixed. If the pixmap is bigger than the system size, it will be scaled.
QPixmap::setMask()
.
Method Detail |
---|
public final QPoint hotSpot()
public final void writeTo(QDataStream outS)
public final void readFrom(QDataStream inS)
public final QPixmap pixmap()
public final void setShape(Qt.CursorShape newShape)
See Qt::CursorShape
for the list of cursor shapes.
shape()
.
public final Qt.CursorShape shape()
Qt::CursorShape
enum values (cast to an int). setShape()
.
public static QPoint pos()
You can call QWidget::mapFromGlobal()
to translate it to widget coordinates.
setPos()
, QWidget::mapFromGlobal()
, and QWidget::mapToGlobal()
.
public static void setPos(QPoint p)
public static void setPos(int x, int y)
You can call QWidget::mapToGlobal()
to translate widget coordinates to global screen coordinates.
pos()
, QWidget::mapFromGlobal()
, and QWidget::mapToGlobal()
.
public final QBitmap bitmap()
public final QBitmap mask()
public QCursor clone()
clone
in class java.lang.Object
|
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