X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/68be9f090f422450d333385cf62c9b4d350674be..b33f7651ae55310d7d76b0205e409464ba8af484:/include/wx/generic/dragimgg.h

diff --git a/include/wx/generic/dragimgg.h b/include/wx/generic/dragimgg.h
index f35a28cc6f..9c4c55aca1 100644
--- a/include/wx/generic/dragimgg.h
+++ b/include/wx/generic/dragimgg.h
@@ -1,4 +1,4 @@
-/////////////////////////////////////////////////////////////////////////////
+//////////////////////////////////////////////////////////////////////////////
 // Name:        wx/generic/dragimgg.h
 // Purpose:     wxDragImage class: a kind of a cursor, that can cope
 //              with more sophisticated images
@@ -13,7 +13,7 @@
 #ifndef _WX_DRAGIMGG_H_
 #define _WX_DRAGIMGG_H_
 
-#ifdef __GNUG__
+#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
 #pragma interface "dragimgg.h"
 #endif
 
@@ -22,6 +22,7 @@
 #include "wx/cursor.h"
 #include "wx/treectrl.h"
 #include "wx/listctrl.h"
+#include "wx/log.h"
 
 /*
   To use this class, create a wxDragImage when you start dragging, for example:
@@ -97,59 +98,135 @@ public:
     // Ctors & dtor
     ////////////////////////////////////////////////////////////////////////////
 
-    wxGenericDragImage();
-    wxGenericDragImage(const wxBitmap& image, const wxCursor& cursor = wxNullCursor, const wxPoint& hotspot = wxPoint(0, 0))
+    wxGenericDragImage(const wxCursor& cursor = wxNullCursor)
+    {
+        Init();
+        Create(cursor);
+    }
+
+    // Deprecated version of the above
+    wxGenericDragImage(const wxCursor& cursor, const wxPoint& cursorHotspot)
+    {
+        Init();
+        Create(cursor, cursorHotspot);
+    }
+
+    wxGenericDragImage(const wxBitmap& image, const wxCursor& cursor = wxNullCursor)
     {
         Init();
 
-        Create(image, cursor, hotspot);
+        Create(image, cursor);
     }
-    wxGenericDragImage(const wxIcon& image, const wxCursor& cursor = wxNullCursor, const wxPoint& hotspot = wxPoint(0, 0))
+
+    // Deprecated version of the above
+    wxGenericDragImage(const wxBitmap& image, const wxCursor& cursor, const wxPoint& cursorHotspot)
     {
         Init();
 
-        Create(image, cursor, hotspot);
+        Create(image, cursor, cursorHotspot);
     }
-    wxGenericDragImage(const wxString& str, const wxCursor& cursor = wxNullCursor, const wxPoint& hotspot = wxPoint(0, 0))
+
+    wxGenericDragImage(const wxIcon& image, const wxCursor& cursor = wxNullCursor)
     {
         Init();
 
-        Create(str, cursor, hotspot);
+        Create(image, cursor);
     }
+
+    // Deprecated version of the above
+    wxGenericDragImage(const wxIcon& image, const wxCursor& cursor, const wxPoint& cursorHotspot)
+    {
+        Init();
+
+        Create(image, cursor, cursorHotspot);
+    }
+
+    wxGenericDragImage(const wxString& str, const wxCursor& cursor = wxNullCursor)
+    {
+        Init();
+
+        Create(str, cursor);
+    }
+
+    // Deprecated version of the above
+    wxGenericDragImage(const wxString& str, const wxCursor& cursor, const wxPoint& cursorHotspot)
+    {
+        Init();
+
+        Create(str, cursor, cursorHotspot);
+    }
+
+#if wxUSE_TREECTRL
     wxGenericDragImage(const wxTreeCtrl& treeCtrl, wxTreeItemId& id)
     {
         Init();
 
         Create(treeCtrl, id);
     }
+#endif
+
+#if wxUSE_LISTCTRL
     wxGenericDragImage(const wxListCtrl& listCtrl, long id)
     {
         Init();
 
         Create(listCtrl, id);
     }
+#endif
+
     ~wxGenericDragImage();
 
     // Attributes
     ////////////////////////////////////////////////////////////////////////////
 
+    // For efficiency, tell wxGenericDragImage to use a bitmap that's already
+    // created (e.g. from last drag)
+    void SetBackingBitmap(wxBitmap* bitmap) { m_pBackingBitmap = bitmap; }
+
     // Operations
     ////////////////////////////////////////////////////////////////////////////
 
+    // Create a drag image with a virtual image (need to override DoDrawImage, GetImageRect)
+    bool Create(const wxCursor& cursor = wxNullCursor);
+    bool Create(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(cursor);
+    }
+
     // Create a drag image from a bitmap and optional cursor
-    bool Create(const wxBitmap& image, const wxCursor& cursor = wxNullCursor, const wxPoint& hotspot = wxPoint(0, 0));
+    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, const wxPoint& hotspot = wxPoint(0, 0));
+    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, const wxPoint& hotspot = wxPoint(0, 0));
+    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.
@@ -178,17 +255,30 @@ public:
 
     void Init();
 
-    wxRect GetImageRect(const wxPoint& pos) const;
+    // Override this if you are using a virtual image (drawing your own image)
+    virtual wxRect GetImageRect(const wxPoint& pos) const;
+
+    // Override this if you are using a virtual image (drawing your own image)
+    virtual bool DoDrawImage(wxDC& dc, const wxPoint& pos) const;
+
+    // Override this if you wish to draw the window contents to the backing bitmap
+    // yourself. This can be desirable if you wish to avoid flicker by not having to
+    // redraw the window itself before dragging in order to be graphic-minus-dragged-objects.
+    // Instead, paint the drag image's backing bitmap to be correct, and leave the window
+    // to be updated only when dragging the objects away (thus giving a smoother appearance).
+    virtual bool UpdateBackingFromWindow(wxDC& windowDC, wxMemoryDC& destDC,
+        const wxRect& sourceRect, const wxRect& destRect) const;
 
     // Erase and redraw simultaneously if possible
-    bool RedrawImage(const wxPoint& oldPos, const wxPoint& newPos, bool eraseOld, bool drawNew);
+    virtual bool RedrawImage(const wxPoint& oldPos, const wxPoint& newPos, bool eraseOld, bool drawNew);
 
 protected:
     wxBitmap        m_bitmap;
     wxIcon          m_icon;
     wxCursor        m_cursor;
     wxCursor        m_oldCursor;
-    wxPoint         m_hotspot;
+//    wxPoint         m_hotspot;
+    wxPoint         m_offset; // The hostpot value passed to BeginDrag
     wxPoint         m_position;
     bool            m_isDirty;
     bool            m_isShown;
@@ -197,6 +287,8 @@ protected:
 
     // Stores the window contents while we're dragging the image around
     wxBitmap        m_backingBitmap;
+    wxBitmap*       m_pBackingBitmap; // Pointer to existing backing bitmap
+                                      // (pass to wxGenericDragImage as an efficiency measure)
     // A temporary bitmap for repairing/redrawing
     wxBitmap        m_repairBitmap;
 
@@ -205,6 +297,7 @@ protected:
 
 private:
     DECLARE_DYNAMIC_CLASS(wxGenericDragImage)
+    DECLARE_NO_COPY_CLASS(wxGenericDragImage)
 };
 
 #endif