http://code.google.com/p/rpcs3/source/detail?r=44

wxWidgets/include/wx/msw/dragimag.h

@@ -0,0 +1,274 @@
+/////////////////////////////////////////////////////////////////////////////
+// Name:        wx/msw/dragimag.h
+// Purpose:     wxDragImage class: a kind of a cursor, that can cope
+//              with more sophisticated images
+// Author:      Julian Smart
+// Modified by:
+// Created:     08/04/99
+// RCS-ID:      $Id: dragimag.h 45845 2007-05-05 19:00:35Z PC $
+// Copyright:   (c) Julian Smart
+// Licence:     wxWindows licence
+/////////////////////////////////////////////////////////////////////////////
+
+#ifndef _WX_DRAGIMAG_H_
+#define _WX_DRAGIMAG_H_
+
+#if wxUSE_DRAGIMAGE
+
+#include "wx/bitmap.h"
+#include "wx/icon.h"
+#include "wx/cursor.h"
+#include "wx/treectrl.h"
+#include "wx/listctrl.h"
+
+// If 1, use a simple wxCursor instead of ImageList_SetDragCursorImage
+#define wxUSE_SIMPLER_DRAGIMAGE 0
+
+/*
+  To use this class, create a wxDragImage when you start dragging, for example:
+
+  void MyTreeCtrl::OnBeginDrag(wxTreeEvent& event)
+  {
+#ifdef __WXMSW__
+    ::UpdateWindow((HWND) GetHWND()); // We need to implement this in wxWidgets
+#endif
+
+    CaptureMouse();
+
+    m_dragImage = new wxDragImage(* this, itemId);
+    m_dragImage->BeginDrag(wxPoint(0, 0), this);
+    m_dragImage->Move(pt, this);
+    m_dragImage->Show(this);
+    ...
+  }
+
+  In your OnMouseMove function, hide the image, do any display updating required,
+  then move and show the image again:
+
+  void MyTreeCtrl::OnMouseMove(wxMouseEvent& event)
+  {
+    if (m_dragMode == MY_TREE_DRAG_NONE)
+    {
+        event.Skip();
+        return;
+    }
+
+    // Prevent screen corruption by hiding the image
+    if (m_dragImage)
+        m_dragImage->Hide(this);
+
+    // Do some updating of the window, such as highlighting the drop target
+    ...
+
+#ifdef __WXMSW__
+    if (updateWindow)
+        ::UpdateWindow((HWND) GetHWND());
+#endif
+
+    // Move and show the image again
+    m_dragImage->Move(event.GetPosition(), this);
+    m_dragImage->Show(this);
+ }
+
+ Eventually we end the drag and delete the drag image.
+
+ void MyTreeCtrl::OnLeftUp(wxMouseEvent& event)
+ {
+    ...
+
+    // End the drag and delete the drag image
+    if (m_dragImage)
+    {
+        m_dragImage->EndDrag(this);
+        delete m_dragImage;
+        m_dragImage = NULL;
+    }
+    ReleaseMouse();
+ }
+*/
+
+/*
+ Notes for Unix version:
+ Can we simply use cursors instead, creating a cursor dynamically, setting it into the window
+ in BeginDrag, and restoring the old cursor in EndDrag?
+ For a really bog-standard implementation, we could simply use a normal dragging cursor
+ and ignore the image.
+*/
+
+/*
+ * wxDragImage
+ */
+
+class WXDLLEXPORT wxDragImage: public wxObject
+{
+public:
+
+    // Ctors & dtor
+    ////////////////////////////////////////////////////////////////////////////
+
+    wxDragImage();
+    wxDragImage(const wxBitmap& image, const wxCursor& cursor = wxNullCursor)
+    {
+        Init();
+
+        Create(image, cursor);
+    }
+
+    // Deprecated form of the above
+    wxDragImage(const wxBitmap& image, const wxCursor& cursor, const wxPoint& cursorHotspot)
+    {
+        Init();
+
+        Create(image, cursor, cursorHotspot);
+    }
+
+    wxDragImage(const wxIcon& image, const wxCursor& cursor = wxNullCursor)
+    {
+        Init();
+
+        Create(image, cursor);
+    }
+
+    // Deprecated form of the above
+    wxDragImage(const wxIcon& image, const wxCursor& cursor, const wxPoint& cursorHotspot)
+    {
+        Init();
+
+        Create(image, cursor, cursorHotspot);
+    }
+
+    wxDragImage(const wxString& str, const wxCursor& cursor = wxNullCursor)
+    {
+        Init();
+
+        Create(str, cursor);
+    }
+
+    // Deprecated form of the above
+    wxDragImage(const wxString& str, const wxCursor& cursor, const wxPoint& cursorHotspot)
+    {
+        Init();
+
+        Create(str, cursor, cursorHotspot);
+    }
+
+#if wxUSE_TREECTRL
+    wxDragImage(const wxTreeCtrl& treeCtrl, wxTreeItemId& id)
+    {
+        Init();
+
+        Create(treeCtrl, id);
+    }
+#endif
+
+#if wxUSE_LISTCTRL
+    wxDragImage(const wxListCtrl& listCtrl, long id)
+    {
+        Init();
+
+        Create(listCtrl, id);
+    }
+#endif
+
+    virtual ~wxDragImage();
+
+    // Attributes
+    ////////////////////////////////////////////////////////////////////////////
+
+    // Operations
+    ////////////////////////////////////////////////////////////////////////////
+
+    // Create a drag image from a bitmap and optional cursor
+    bool Create(const wxBitmap& image, const wxCursor& cursor = wxNullCursor);
+    bool Create(const wxBitmap& image, const wxCursor& cursor, const wxPoint& WXUNUSED(cursorHotspot))
+    {
+        wxLogDebug(wxT("wxDragImage::Create: use of a cursor hotspot is now deprecated. Please omit this argument."));
+        return Create(image, cursor);
+    }
+
+    // Create a drag image from an icon and optional cursor
+    bool Create(const wxIcon& image, const wxCursor& cursor = wxNullCursor);
+    bool Create(const wxIcon& image, const wxCursor& cursor, const wxPoint& WXUNUSED(cursorHotspot))
+    {
+        wxLogDebug(wxT("wxDragImage::Create: use of a cursor hotspot is now deprecated. Please omit this argument."));
+        return Create(image, cursor);
+    }
+
+    // Create a drag image from a string and optional cursor
+    bool Create(const wxString& str, const wxCursor& cursor = wxNullCursor);
+    bool Create(const wxString& str, const wxCursor& cursor, const wxPoint& WXUNUSED(cursorHotspot))
+    {
+        wxLogDebug(wxT("wxDragImage::Create: use of a cursor hotspot is now deprecated. Please omit this argument."));
+        return Create(str, cursor);
+    }
+
+#if wxUSE_TREECTRL
+    // Create a drag image for the given tree control item
+    bool Create(const wxTreeCtrl& treeCtrl, wxTreeItemId& id);
+#endif
+
+#if wxUSE_LISTCTRL
+    // Create a drag image for the given list control item
+    bool Create(const wxListCtrl& listCtrl, long id);
+#endif
+
+    // Begin drag. hotspot is the location of the drag position relative to the upper-left
+    // corner of the image.
+    bool BeginDrag(const wxPoint& hotspot, wxWindow* window, bool fullScreen = false, wxRect* rect = (wxRect*) NULL);
+
+    // Begin drag. hotspot is the location of the drag position relative to the upper-left
+    // corner of the image. This is full screen only. fullScreenRect gives the
+    // position of the window on the screen, to restrict the drag to.
+    bool BeginDrag(const wxPoint& hotspot, wxWindow* window, wxWindow* fullScreenRect);
+
+    // End drag
+    bool EndDrag();
+
+    // Move the image: call from OnMouseMove. Pt is in window client coordinates if window
+    // is non-NULL, or in screen coordinates if NULL.
+    bool Move(const wxPoint& pt);
+
+    // Show the image
+    bool Show();
+
+    // Hide the image
+    bool Hide();
+
+    // Implementation
+    ////////////////////////////////////////////////////////////////////////////
+
+    // Initialize variables
+    void Init();
+
+    // Returns the native image list handle
+    WXHIMAGELIST GetHIMAGELIST() const { return m_hImageList; }
+
+#if !wxUSE_SIMPLER_DRAGIMAGE
+    // Returns the native image list handle for the cursor
+    WXHIMAGELIST GetCursorHIMAGELIST() const { return m_hCursorImageList; }
+#endif
+
+protected:
+    WXHIMAGELIST    m_hImageList;
+
+#if wxUSE_SIMPLER_DRAGIMAGE
+    wxCursor        m_oldCursor;
+#else
+    WXHIMAGELIST    m_hCursorImageList;
+#endif
+
+    wxCursor        m_cursor;
+//    wxPoint         m_cursorHotspot; // Obsolete
+    wxPoint         m_position;
+    wxWindow*       m_window;
+    wxRect          m_boundingRect;
+    bool            m_fullScreen;
+
+private:
+    DECLARE_DYNAMIC_CLASS(wxDragImage)
+    DECLARE_NO_COPY_CLASS(wxDragImage)
+};
+
+#endif // wxUSE_DRAGIMAGE
+#endif
+    // _WX_DRAGIMAG_H_