以下成员源于类 QDropEvent are part of the Qt compatibility layer. We advise against using them in new code.
| enum | 动作 { Copy, Link, Move, Private, UserAction } |
| void | accept (bool accept ) |
| void | acceptAction (bool accept = true) |
| 动作 | action () const |
| virtual QByteArray | encodedData (const char * format ) const |
| virtual const char * | format (int n = 0) const |
| virtual bool | 提供 (const char * mimeType ) const |
| void | setPoint (const QPoint & point ) |
When a drag and drop action is completed, the target is expected to perform an action on the data provided by the source. This will be one of the following:
| 常量 | 值 | 描述 |
|---|---|---|
QDropEvent::Copy
|
0
|
The default action. The source simply uses the data provided in the operation. |
QDropEvent::Link
|
1
|
The source should somehow create a link to the location specified by the data. |
QDropEvent::Move
|
2
|
The source should somehow move the object from the location specified by the data to a new location. |
QDropEvent::Private
|
3
|
The target has special knowledge of the MIME type, which the source should respond to in a similar way to a Copy. |
QDropEvent::UserAction
|
Private
|
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 ).
调用 setAccepted ( accept ) 代替。
Call this to indicate that the action described by action () is accepted (i.e. if accept 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).
使用 dropAction () 代替。
The table below shows the correspondance between the return type of action() and the return type of dropAction ().
| Old enum value | New enum value |
|---|---|
| QDropEvent::Copy | Qt::CopyAction |
| QDropEvent::Move | Qt::MoveAction |
| QDropEvent::Link | Qt::LinkAction |
| other | Qt::CopyAction |
[虚拟]
QByteArray
QDropEvent::
encodedData
(const
char
*
format
) const
重实现自 QMimeSource::encodedData ().
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 that particular format .
The resulting data will have a size of 0 if the format was not available.
另请参阅 format () 和 QByteArray::size ().
[虚拟]
const
char
* QDropEvent::
format
(
int
n
= 0) const
重实现自 QMimeSource::format ().
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 提供 ().
[虚拟]
bool
QDropEvent::
提供
(const
char
*
mimeType
) const
重实现自 QMimeSource::provides ().
Returns true if this event provides format mimeType ；否则返回 false。
另请参阅 data ().
Sets the drop to happen at the given point . You do not normally need to use this as it will be set internally before your widget receives the drop event.