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java.lang.Objectcom.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.
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.
Shape | Qt::CursorShape Value | Cursor Name | Shape | Qt::CursorShape Value | Cursor Name |
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![]() | 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 |
Nested Class Summary |
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Nested classes/interfaces inherited from class com.trolltech.qt.QSignalEmitter |
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QSignalEmitter.Signal0, QSignalEmitter.Signal1<A>, QSignalEmitter.Signal2<A,B>, QSignalEmitter.Signal3<A,B,C>, QSignalEmitter.Signal4<A,B,C,D>, QSignalEmitter.Signal5<A,B,C,D,E>, QSignalEmitter.Signal6<A,B,C,D,E,F>, QSignalEmitter.Signal7<A,B,C,D,E,F,G>, QSignalEmitter.Signal8<A,B,C,D,E,F,G,H>, QSignalEmitter.Signal9<A,B,C,D,E,F,G,H,I> |
Constructor Summary | |
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QCursor()
Constructs a cursor with the default arrow shape. |
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QCursor(QBitmap bitmap,
QBitmap mask)
Equivalent to QCursor(bitmap, mask, -1, -1). |
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QCursor(QBitmap bitmap,
QBitmap mask,
int hotX)
Equivalent to QCursor(bitmap, mask, hotX, -1). |
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QCursor(QBitmap bitmap,
QBitmap mask,
int hotX,
int hotY)
Constructs a custom bitmap cursor. |
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QCursor(QCursor cursor)
Constructs a copy of the cursor cursor. |
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QCursor(QPixmap pixmap)
Equivalent to QCursor(pixmap, -1, -1). |
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QCursor(QPixmap pixmap,
int hotX)
Equivalent to QCursor(pixmap, hotX, -1). |
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QCursor(QPixmap pixmap,
int hotX,
int hotY)
Constructs a custom pixmap cursor. |
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QCursor(Qt.CursorShape shape)
Constructs a cursor with the specified shape. |
Method Summary | |
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QBitmap |
bitmap()
Returns the cursor bitmap, or null if it is one of the standard cursors. |
static QCursor |
fromNativePointer(QNativePointer nativePointer)
This function returns the QCursor instance pointed to by nativePointer |
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. |
static QNativePointer |
nativePointerArray(QCursor[] array)
This function returns a QNativePointer that is pointing to the specified QCursor array. |
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)
Reads a QCursor from 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 newShape. |
Qt.CursorShape |
shape()
Returns the cursor shape identifier. |
void |
writeTo(QDataStream outS)
Writes thisQCursor to outS. |
Methods inherited from class com.trolltech.qt.QtJambiObject |
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dispose, disposed, finalize, reassignNativeResources, tr, tr, tr |
Methods inherited from class com.trolltech.qt.QSignalEmitter |
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blockSignals, disconnect, disconnect, signalsBlocked, signalSender, thread |
Methods inherited from class java.lang.Object |
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clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Methods inherited from interface com.trolltech.qt.QtJambiInterface |
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disableGarbageCollection, nativeId, nativePointer, reenableGarbageCollection, setJavaOwnership |
Constructor Detail |
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public QCursor()
Constructs a cursor with the default arrow shape.
public QCursor(Qt.CursorShape shape)
Constructs a cursor with the specified shape.
See Qt::CursorShape for a list of shapes.
public QCursor(QBitmap bitmap, QBitmap mask, int hotX)
Equivalent to QCursor(bitmap, mask, hotX, -1).
public QCursor(QBitmap bitmap, QBitmap mask)
Equivalent to QCursor(bitmap, mask, -1, -1).
public QCursor(QBitmap bitmap, QBitmap mask, int hotX, int hotY)
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:
Use the global Qt color 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.
public QCursor(QCursor cursor)
Constructs a copy of the cursor cursor.
public QCursor(QPixmap pixmap, int hotX)
Equivalent to QCursor(pixmap, hotX, -1).
public QCursor(QPixmap pixmap)
Equivalent to QCursor(pixmap, -1, -1).
public QCursor(QPixmap pixmap, int hotX, int hotY)
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 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.
Method Detail |
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public final QPoint hotSpot()
Returns the cursor hot spot, or (0, 0) if it is one of the standard cursors.
public final void writeTo(QDataStream outS)
public final void readFrom(QDataStream inS)
public final QPixmap pixmap()
Returns the cursor pixmap. This is only valid if the cursor is a pixmap cursor.
public final void setShape(Qt.CursorShape newShape)
Sets the cursor to the shape identified by newShape.
See Qt::CursorShape for the list of cursor shapes.
public final Qt.CursorShape shape()
Returns the cursor shape identifier. The return value is one of the Qt::CursorShape enum values (cast to an int).
public static QPoint pos()
Returns the position of the cursor (hot spot) in global screen coordinates.
You can call QWidget::mapFromGlobal() to translate it to widget coordinates.
public static void setPos(QPoint p)
Moves the cursor (hot spot) to the global screen position at point p.
public static void setPos(int x, int y)
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.
public static QCursor fromNativePointer(QNativePointer nativePointer)
nativePointer
- the QNativePointer of which object should be returned.public static QNativePointer nativePointerArray(QCursor[] array)
array
- the array that the returned pointer will point to.
public final QBitmap bitmap()
public final QBitmap mask()
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