QDragMoveEvent(3qt)QDragMoveEvent(3qt)NAME
QDragMoveEvent - Event which is sent while a drag and drop is in progress
SYNOPSIS
#include <qevent.h>
Inherits QDropEvent.
Inherited by QDragEnterEvent.
Public Members
QDragMoveEvent ( const QPoint & pos, Type type = DragMove )
QRect answerRect () const
void accept ( const QRect & r )
void ignore ( const QRect & r )
DESCRIPTION
The QDragMoveEvent class provides an event which is sent while a drag and drop is in progress.
When a widget accepts drop events, it will receive this event repeatedly while the drag is within the widget's boundaries. The widget
should examine the event to see what data it provides, and accept() the drop if appropriate.
Note that this class inherits most of its functionality from QDropEvent.
See also Drag And Drop Classes and Event Classes.
MEMBER FUNCTION DOCUMENTATION QDragMoveEvent::QDragMoveEvent ( const QPoint & pos, Type type = DragMove )
Creates a QDragMoveEvent for which the mouse is at point pos, and the event is of type type.
Warning: Do not create a QDragMoveEvent yourself since these objects rely on Qt's internal state.
void QDragMoveEvent::accept ( const QRect & r )
The same as accept(), but also notifies that future moves will also be acceptable if they remain within the rectangle r on the widget: this
can improve performance, but may also be ignored by the underlying system.
If the rectangle is empty, then drag move events will be sent continuously. This is useful if the source is scrolling in a timer event.
Examples:
QRect QDragMoveEvent::answerRect () const
Returns the rectangle for which the acceptance of the move event applies.
void QDragMoveEvent::ignore ( const QRect & r )
The opposite of accept(const QRect&), i.e. says that moves within rectangle r are not acceptable (will be ignored).
Example: dirview/dirview.cpp.
SEE ALSO
http://doc.trolltech.com/qdragmoveevent.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
(qdragmoveevent.3qt) and the Qt version (3.3.8).
Trolltech AS 2 February 2007 QDragMoveEvent(3qt)
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QDropEvent(3qt)QDropEvent(3qt)NAME
QDropEvent - Event which is sent when a drag and drop is completed
SYNOPSIS
#include <qevent.h>
Inherits QEvent and QMimeSource.
Inherited by QDragMoveEvent.
Public Members
QDropEvent ( const QPoint & pos, Type typ = Drop )
const QPoint & pos () const
bool isAccepted () const
void accept ( bool y = TRUE )
void ignore ()
bool isActionAccepted () const
void acceptAction ( bool y = TRUE )
enum Action { Copy, Link, Move, Private, UserAction = 100 }
void setAction ( Action a )
Action action () const
QWidget * source () const
virtual const char * format ( int n = 0 ) const
virtual QByteArray encodedData ( const char * format ) const
virtual bool provides ( const char * mimeType ) const
QByteArray data ( const char * f ) const (obsolete)
void setPoint ( const QPoint & np )
DESCRIPTION
The QDropEvent class provides an event which is sent when a drag and drop is completed.
When a widget accepts drop events, it will receive this event if it has accepted the most recent QDragEnterEvent or QDragMoveEvent sent to
it.
The widget should use data() to extract the data in an appropriate format.
See also Drag And Drop Classes and Event Classes.
Member Type Documentation
QDropEvent::Action
This enum describes the action which a source requests that a target perform with dropped data.
QDropEvent::Copy - The default action. The source simply uses the data provided in the operation.
QDropEvent::Link - The source should somehow create a link to the location specified by the data.
QDropEvent::Move - The source should somehow move the object from the location specified by the data to a new location.
QDropEvent::Private - The target has special knowledge of the MIME type, which the source should respond to in a similar way to a Copy.
QDropEvent::UserAction - The source and target can co-operate using special actions. This feature is not currently supported.
The Link and Move actions only makes sense if the data is a reference, for example, text/uri-list file lists (see QUriDrag).
MEMBER FUNCTION DOCUMENTATION QDropEvent::QDropEvent ( const QPoint & pos, Type typ = Drop )
Constructs a drop event that drops a drop of type typ on point pos.
void QDropEvent::accept ( bool y = TRUE )
Call this function to indicate whether the event provided data which your widget processed. Set y to TRUE (the default) if your widget
could process the data, otherwise set y to FALSE. To get the data, use encodedData(), or preferably, the decode() methods of existing
QDragObject subclasses, such as QTextDrag::decode(), or your own subclasses.
Call this function to indicate whether the event provided data which your widget processed. Set y to TRUE (the default) if your widget
could process the data, otherwise set y to FALSE. To get the data, use encodedData(), or preferably, the decode() methods of existing
QDragObject subclasses, such as QTextDrag::decode(), or your own subclasses.
See also acceptAction().
Example: iconview/simple_dd/main.cpp.
void QDropEvent::acceptAction ( bool y = TRUE )
Call this to indicate that the action described by action() is accepted (i.e. if y is TRUE, which is the default), not merely the default
copy action. If you call acceptAction(TRUE), there is no need to also call accept(TRUE).
Examples:
Action QDropEvent::action () const
Returns the Action which the target is requesting to be performed with the data. If your application understands the action and can process
the supplied data, call acceptAction(); if your application can process the supplied data but can only perform the Copy action, call
accept().
Examples:
QByteArray QDropEvent::data ( const char * f ) const
This function is obsolete. It is provided to keep old source working. We strongly advise against using it in new code.
Use QDropEvent::encodedData().
QByteArray QDropEvent::encodedData ( const char * format ) const [virtual]
Returns a byte array containing the drag's data, in format.
data() normally needs to get the data from the drag source, which is potentially very slow, so it's advisable to call this function only if
you're sure that you will need the data in format.
The resulting data will have a size of 0 if the format was not available.
See also format() and QByteArray::size().
Reimplemented from QMimeSource.
const char * QDropEvent::format ( int n = 0 ) const [virtual]
Returns a string describing one of the available data types for this drag. Common examples are "text/plain" and "image/gif". If n is less
than zero or greater than the number of available data types, format() returns 0.
This function is provided mainly for debugging. Most drop targets will use provides().
See also data() and provides().
Example: iconview/main.cpp.
Reimplemented from QMimeSource.
void QDropEvent::ignore ()
The opposite of accept(), i.e. you have ignored the drop event.
Example: fileiconview/qfileiconview.cpp.
bool QDropEvent::isAccepted () const
Returns TRUE if the drop target accepts the event; otherwise returns FALSE.
bool QDropEvent::isActionAccepted () const
Returns TRUE if the drop action was accepted by the drop site; otherwise returns FALSE.
const QPoint &; QDropEvent::pos () const
Returns the position where the drop was made.
Example: dirview/dirview.cpp.
bool QDropEvent::provides ( const char * mimeType ) const [virtual]
Returns TRUE if this event provides format mimeType; otherwise returns FALSE.
See also data().
Example: fileiconview/qfileiconview.cpp.
Reimplemented from QMimeSource.
void QDropEvent::setAction ( Action a )
Sets the action to a. This is used internally, you should not need to call this in your code: the source decides the action, not the
target.
void QDropEvent::setPoint ( const QPoint & np )
Sets the drop to happen at point np. You do not normally need to use this as it will be set internally before your widget receives the drop
event.
QWidget * QDropEvent::source () const
If the source of the drag operation is a widget in this application, this function returns that source, otherwise it returns 0. The source
of the operation is the first parameter to drag object subclasses.
This is useful if your widget needs special behavior when dragging to itself, etc.
See QDragObject::QDragObject() and subclasses.
SEE ALSO
http://doc.trolltech.com/qdropevent.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 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
(qdropevent.3qt) and the Qt version (3.1.1).
Trolltech AS 9 December 2002 QDropEvent(3qt)