[hbelusca] 71329: [PROGMAN] Implement drag&drop support for program items. A similar functionality can be implemented later in our shell32/explorer, based on this code. We do here better than Windo...

Author: hbelusca
Date: Thu May 12 22:36:05 2016
New Revision: 71329

URL: http://svn.reactos.org/svn/reactos?rev=71329&view=rev
Log:
[PROGMAN]
Implement drag&drop support for program items. A similar functionality can be
implemented later in our shell32/explorer, based on this code.
We do here better than Windows' progman since we can select and move more than one
icon.
Note that if you test it on ReactOS you will see nice bugs coming from our (well,
Wine's) comctl32.dll xD :P

Modified:
    trunk/reactos/base/shell/progman/group.c
    trunk/reactos/base/shell/progman/progman.h

Modified: trunk/reactos/base/shell/progman/group.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/base/shell/progman/group.c…
==============================================================================
--- trunk/reactos/base/shell/progman/group.c	[iso-8859-1] (original)
+++ trunk/reactos/base/shell/progman/group.c	[iso-8859-1] Thu May 12 22:36:05 2016
@@ -119,6 +119,7 @@
     PROGGROUP* group;
     INT iItem;
     LVITEMW lvItem;
+    POINT pt;
 
     group = (PROGGROUP*)GetWindowLongPtrW(hWnd, 0);
 
@@ -260,6 +261,98 @@
                     /* ... or use group->hActiveProgram */
                     PROGRAM_ExecuteProgram((PROGRAM*)lvItem.lParam);
                     break;
+                }
+
+                case LVN_BEGINDRAG:
+                {
+                    POINT ptMin;
+
+                    BOOL bFirst = TRUE;
+                    for (iItem = SendMessageA(group->hListView, LVM_GETNEXTITEM, -1,
LVNI_SELECTED);
+                         iItem != -1;
+                         iItem = SendMessageA(group->hListView, LVM_GETNEXTITEM,
iItem, LVNI_SELECTED))
+                    {
+                        if (bFirst)
+                        {
+                            group->hDragImageList =
(HIMAGELIST)SendMessageA(group->hListView,
+                                                                            
LVM_CREATEDRAGIMAGE,
+                                                                             iItem,
+                                                                            
(LPARAM)&pt);
+                            ptMin  = pt;
+                            bFirst = FALSE;
+                        }
+                        else
+                        {
+                            HIMAGELIST hOneImageList, hTempImageList;
+
+                            hOneImageList =
(HIMAGELIST)SendMessageA(group->hListView,
+                                                                    
LVM_CREATEDRAGIMAGE,
+                                                                     iItem,
+                                                                     (LPARAM)&pt);
+                            hTempImageList = ImageList_Merge(group->hDragImageList,
+                                                             0,
+                                                             hOneImageList,
+                                                             0,
+                                                             pt.x - ptMin.x,
+                                                             pt.y - ptMin.y);
+                            ImageList_Destroy(group->hDragImageList);
+                            ImageList_Destroy(hOneImageList);
+                            group->hDragImageList = hTempImageList;
+                            ptMin.x = min(ptMin.x, pt.x);
+                            ptMin.y = min(ptMin.y, pt.y);
+                        }
+                    }
+                    // pt = ((LPNMLISTVIEW)lParam)->ptAction;
+                    pt.x = ((LPNMLISTVIEW)lParam)->ptAction.x;
+                    pt.y = ((LPNMLISTVIEW)lParam)->ptAction.y;
+                    group->ptStart = pt;
+                    pt.x -= ptMin.x;
+                    pt.y -= ptMin.y;
+                    ImageList_BeginDrag(group->hDragImageList, 0, pt.x, pt.y);
+                    MapWindowPoints(group->hListView, Globals.hMDIWnd, &pt, 1);
+                    ImageList_DragEnter(Globals.hMDIWnd, pt.x, pt.y);
+                    group->bDragging = TRUE;
+                    group->hOldCursor = GetCursor();
+                    SetCapture(group->hWnd);
+
+                    break;
+                }
+            }
+            break;
+
+        case WM_MOUSEMOVE:
+            if (group->bDragging)
+            {
+                pt.x = GET_X_LPARAM(lParam);
+                pt.y = GET_Y_LPARAM(lParam);
+                MapWindowPoints(group->hWnd, Globals.hMDIWnd, &pt, 1);
+                ImageList_DragMove(pt.x, pt.y);
+            }
+            break;
+
+        case WM_LBUTTONUP:
+            if (group->bDragging)
+            {
+                // LVHITTESTINFO lvhti;
+                POINT ptHit;
+
+                group->bDragging = FALSE;
+                ImageList_DragLeave(Globals.hMDIWnd);
+                ImageList_EndDrag();
+                ImageList_Destroy(group->hDragImageList);
+                ReleaseCapture();
+                SetCursor(group->hOldCursor);
+                ptHit.x = GET_X_LPARAM(lParam);
+                ptHit.y = GET_Y_LPARAM(lParam);
+                MapWindowPoints(group->hWnd, group->hListView, &ptHit, 1);
+                for (iItem = SendMessageA(group->hListView, LVM_GETNEXTITEM, -1,
LVNI_SELECTED);
+                     iItem != -1;
+                     iItem = SendMessageA(group->hListView, LVM_GETNEXTITEM, iItem,
LVNI_SELECTED))
+                {
+                    SendMessageA(group->hListView, LVM_GETITEMPOSITION, iItem,
(LPARAM)&pt);
+                    pt.x += ptHit.x - group->ptStart.x;
+                    pt.y += ptHit.y - group->ptStart.y;
+                    SendMessageA(group->hListView, LVM_SETITEMPOSITION, iItem,
MAKELPARAM(pt.x, pt.y));
                 }
             }
             break;

Modified: trunk/reactos/base/shell/progman/progman.h
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/base/shell/progman/progman…
==============================================================================
--- trunk/reactos/base/shell/progman/progman.h	[iso-8859-1] (original)
+++ trunk/reactos/base/shell/progman/progman.h	[iso-8859-1] Thu May 12 22:36:05 2016
@@ -46,6 +46,8 @@
 
 #include <commctrl.h>
 #include <richedit.h>
+
+#include <windowsx.h>
 
 #define MAX_STRING_LEN      255
 #define MAX_PATHNAME_LEN    1024