[reactos] 03/03: [SHELL32] CDefView: Find a reasonable place to show a context menu Previously, we would treat the input as unsigned coordinates, this is wrong! If the coordinates are invalid, we try to find a focused or selected item. The center of this item is where we'll show the menu. When there is no item, we default to 0, 0

[Mark Jansen]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=9ae373a023c2c22f037b1…

commit 9ae373a023c2c22f037b1f5ac60b927c89b45859
Author:     Mark Jansen <mark.jansen(a)reactos.org>
AuthorDate: Mon Jan 14 21:49:59 2019 +0100
Commit:     Giannis Adamopoulos <gadamopoulos(a)reactos.org>
CommitDate: Tue Jan 15 14:34:53 2019 +0200

    [SHELL32] CDefView: Find a reasonable place to show a context menu
    Previously, we would treat the input as unsigned coordinates, this is wrong!
    If the coordinates are invalid, we try to find a focused or selected item.
    The center of this item is where we'll show the menu.
    When there is no item, we default to 0,0
---
 dll/win32/shell32/CDefView.cpp | 44 +++++++++++++++++++++++++++++++++++++-----
 1 file changed, 39 insertions(+), 5 deletions(-)

diff --git a/dll/win32/shell32/CDefView.cpp b/dll/win32/shell32/CDefView.cpp
index b382dcd31f..e3cab68671 100644
--- a/dll/win32/shell32/CDefView.cpp
+++ b/dll/win32/shell32/CDefView.cpp
@@ -1324,14 +1324,11 @@ cleanup:
  */
 LRESULT CDefView::OnContextMenu(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL
&bHandled)
 {
-    WORD    x, y;
+    int     x, y;
     UINT    uCommand;
     HRESULT hResult;
 
-    x = LOWORD(lParam);
-    y = HIWORD(lParam);
-
-    TRACE("(%p)->(0x%08x 0x%08x) stub\n", this, x, y);
+    TRACE("(%p)->()\n", this);
 
     m_hContextMenu = CreatePopupMenu();
     if (!m_hContextMenu) 
@@ -1348,6 +1345,43 @@ LRESULT CDefView::OnContextMenu(UINT uMsg, WPARAM wParam, LPARAM
lParam, BOOL &b
     if (FAILED_UNEXPECTEDLY(hResult))
         goto cleanup;
 
+    /* There is no position requested, so try to find one */
+    if (lParam == ~0)
+    {
+        int lvIndex;
+        POINT pt;
+
+        /* Do we have a focused item, */
+        if ((lvIndex = m_ListView.GetNextItem(-1, LVIS_FOCUSED)) < 0)
+        {
+            /* or a selected item? */
+            lvIndex = m_ListView.GetNextItem(-1, LVIS_SELECTED);
+        }
+        /* We got something */
+        if (lvIndex > -1)
+        {
+            /* Let's find the center of the icon */
+            RECT rc = { LVIR_ICON };
+            m_ListView.SendMessage(LVM_GETITEMRECT, lvIndex, (LPARAM)&rc);
+            pt.x = (rc.right + rc.left) / 2;
+            pt.y = (rc.bottom + rc.top) / 2;
+        }
+        else
+        {
+            /* We have to drop it somewhere.. */
+            pt.x = pt.y = 0;
+        }
+        
+        m_ListView.ClientToScreen(&pt);
+        x = pt.x;
+        y = pt.y;
+    }
+    else
+    {
+        x = GET_X_LPARAM(lParam);
+        y = GET_Y_LPARAM(lParam);
+    }
+
     uCommand = TrackPopupMenu(m_hContextMenu,
                               TPM_LEFTALIGN | TPM_RETURNCMD | TPM_LEFTBUTTON |
TPM_RIGHTBUTTON,
                               x, y, 0, m_hWnd, NULL);