docs/latex/wx/dropsrc.tex

   1 \section{\class{wxDropSource}}\label{wxdropsource}
   2
   3 This class represents a source for a drag and drop operation.
   4
   5 See \helpref{Drag and drop overview}{wxdndoverview} and \helpref{wxDataObject overview}{wxdataobjectoverview}
   6 for more information.
   7
   8 \wxheading{Derived from}
   9
  10 None
  11
  12 \wxheading{Include files}
  13
  14 <wx/dnd.h>
  15
  16 \wxheading{Types}
  17
  18 \index{wxDragResult}wxDragResult is defined as follows:
  19
  20 \begin{verbatim}
  21 enum wxDragResult
  22 {
  23     wxDragError,    // error prevented the d&d operation from completing
  24     wxDragNone,     // drag target didn't accept the data
  25     wxDragCopy,     // the data was successfully copied
  26     wxDragMove,     // the data was successfully moved
  27     wxDragCancel    // the operation was cancelled by user (not an error)
  28 };
  29 \end{verbatim}
  30
  31 \wxheading{See also}
  32
  33 \helpref{wxDropTarget}{wxdroptarget},
  34 \helpref{wxTextDropTarget}{wxtextdroptarget}, \helpref{wxFileDropTarget}{wxfiledroptarget}
  35
  36 \latexignore{\rtfignore{\wxheading{Members}}}
  37
  38 \membersection{wxDropSource::wxDropSource}\label{wxdropsourcewxdropsource}
  39
  40 \func{}{wxDropSource}{\param{wxWindow*}{ win = NULL},\param{const wxIconOrCursor\& }{iconCopy = wxNullIconOrCursor}, \param{const wxIconOrCursor\& }{iconCopy = wxNullIconOrCursor}, \param{const wxIconOrCursor\& }{iconNone = wxNullIconOrCursor}}
  41
  42 \func{}{wxDropSource}{\param{wxDataObject\&}{ data}, \param{wxWindow*}{ win = NULL},\param{const wxIconOrCursor\& }{iconCopy = wxNullIconOrCursor}, \param{const wxIconOrCursor\& }{iconCopy = wxNullIconOrCursor}, \param{const wxIconOrCursor\& }{iconNone = wxNullIconOrCursor}}
  43
  44 The constructors for wxDataObject.
  45
  46 If you use the constructor without {\it data} parameter you must call
  47 \helpref{SetData}{wxdropsourcesetdata} later.
  48
  49 Note that the exact type of {\it iconCopy} and subsequent parameters differs
  50 between wxMSW and wxGTK: these are cursors under Windows but icons for GTK.
  51 You should use the macro \helpref{wxDROP\_ICON}{wxdropicon} in portable
  52 programs instead of directly using either of these types.
  53
  54 \wxheading{Parameters}
  55
  56 \docparam{win}{The window which initiates the drag and drop operation.}
  57
  58 \docparam{iconCopy}{The icon or cursor used for feedback for copy operation.}
  59
  60 \docparam{iconMove}{The icon or cursor used for feedback for move operation.}
  61
  62 \docparam{iconNone}{The icon or cursor used for feedback when operation can't be done.}
  63
  64 {\it win} is the window which initiates the drag and drop operation.
  65
  66 \membersection{wxDropSource::\destruct{wxDropSource}}\label{wxdropsourcedtor}
  67
  68 \func{virtual }{\destruct{wxDropSource}}{\void}
  69
  70 \membersection{wxDropSource::SetData}\label{wxdropsourcesetdata}
  71
  72 \func{void}{SetData}{\param{wxDataObject\&}{ data}}
  73
  74 Sets the data \helpref{wxDataObject}{wxdataobject} associated with the
  75 drop source. This will not delete any previously associated data.
  76
  77 \membersection{wxDropSource::DoDragDrop}\label{wxdropsourcedodragdrop}
  78
  79 \func{virtual wxDragResult}{DoDragDrop}{\param{int }{flags = {\tt wxDrag\_CopyOnly}}}
  80
  81 Do it (call this in response to a mouse button press, for example). This starts
  82 the drag-and-drop operation which will terminate when the user releases the
  83 mouse.
  84
  85 \wxheading{Parameters}
  86
  87 \docparam{flags}{If {\tt wxDrag\_AllowMove} is included in the flags, data may
  88 be moved and not only copied (default). If {\tt wxDrag\_DefaultMove} is
  89 specified (which includes the previous flag), this is even the default
  90 operation}.
  91
  92 \wxheading{Return value}
  93
  94 Returns the operation requested by the user, may be {\tt wxDragCopy}, {\tt
  95 wxDragMove}, {\tt wxDragCancel} or {\tt wxDragNone} if an error occured.
  96
  97 \membersection{wxDropSource::GiveFeedback}\label{wxdropsourcegivefeedback}
  98
  99 \func{virtual bool}{GiveFeedback}{\param{wxDragResult }{effect}, \param{bool }{scrolling}}
 100
 101 Overridable: you may give some custom UI feedback during the drag and drop operation
 102 in this function. It is called on each mouse move, so your implementation must not be too
 103 slow.
 104
 105 \wxheading{Parameters}
 106
 107 \docparam{effect}{The effect to implement. One of wxDragCopy, wxDragMove and wxDragNone. }
 108
 109 \docparam{scrolling}{TRUE if the window is scrolling. MSW only. }
 110
 111 \wxheading{Return value}
 112
 113 Return FALSE if you want default feedback, or TRUE if you implement your own
 114 feedback. The return values is ignored under GTK.
 115