From 231105f4282b51f5d2ffc6c9adff0ec29c044e1d Mon Sep 17 00:00:00 2001
From: qmathe <qmathe@72102866-910b-0410-8b05-ffd578937521>
Date: Tue, 19 Feb 2013 16:59:21 +0000
Subject: [PATCH] Cleaned drop handling code a bit more in NSTableView

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/gui/trunk@36170 72102866-910b-0410-8b05-ffd578937521
---
 ChangeLog            |  6 +++++
 Source/NSTableView.m | 60 +++++++++++++++++++-------------------------
 2 files changed, 32 insertions(+), 34 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index af4ae2253..dbaa5e218 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2013-02-19  Quentin Mathe <quentin.mathe@gmail.com>
+
+	* Source/NSTableView.m (-_drawDropIndicator, 
+	-_setDropOperationAndRow:usingPositionInRow:atPoint:, -draggingUpdated:):
+	Cleaned code a bit more.
+
 2013-02-19  Quentin Mathe <quentin.mathe@gmail.com>
 
 	* Source/NSTableView.m (-draggingUpdated:): Don't update the drop row and 
diff --git a/Source/NSTableView.m b/Source/NSTableView.m
index 4a0e05fb4..07cc0c1ff 100644
--- a/Source/NSTableView.m
+++ b/Source/NSTableView.m
@@ -6204,7 +6204,6 @@ This method is deprecated, use -columnIndexesInRect:. */
 	   newRect = [self bounds];
 	   NSFrameRectWithWidth(newRect, 2.0);
 	   oldDraggingRect = newRect;
-	   currentDropRow = _numberOfRows;
 	}
   else if (currentDropOperation == NSTableViewDropAbove)
 	{
@@ -6241,10 +6240,6 @@ This method is deprecated, use -columnIndexesInRect:. */
 	  newRect.origin.x -= _intercellSpacing.height / 2;
 	  newRect.size.height += _intercellSpacing.height;
 
-	  oldDraggingRect = newRect;
-	  oldDraggingRect.origin.y -= 1;
-	  oldDraggingRect.size.height += 2;
-
 	  newRect.size.height -= 1;
 	  newRect.origin.x += 3;
 	  newRect.size.width -= 3;
@@ -6256,14 +6251,11 @@ This method is deprecated, use -columnIndexesInRect:. */
 			//newRect.size.width -= 2;
 			newRect.size.height += 1;
 		}
-	  else
-		{
-
-		}
-
-		NSFrameRectWithWidth(newRect, 2.0);
-		//	      NSRectFill(newRect);
+	  NSFrameRectWithWidth(newRect, 2.0);
 
+	  oldDraggingRect = newRect;
+	  oldDraggingRect.origin.y -= 1;
+	  oldDraggingRect.size.height += 2;
 	}
 
 	[_window flushWindow];
@@ -6292,24 +6284,22 @@ view to drag. */
     }
 }
 
+- (NSInteger) _computedRowAtPoint: (NSPoint)p
+{
+  return (NSInteger)(p.y - _bounds.origin.y) / (NSInteger)_rowHeight;
+}
+
 - (void) _setDropOperationAndRow: (NSInteger)row
               usingPositionInRow: (NSInteger)positionInRow 
                          atPoint: (NSPoint)p
 {
-  // Are we in the two middle quarters of the row? Use TableViewDropOn
-  if ((positionInRow > _rowHeight / 4 && positionInRow <= (3 * _rowHeight) / 4)
-   || row > _numberOfRows)
-    {
-      currentDropRow  = (int)(p.y - _bounds.origin.y) / (int)_rowHeight;
-      currentDropOperation = NSTableViewDropOn;
-      if (currentDropRow >= _numberOfRows)
-        currentDropRow = -1;
-    }
-  else // drop above
-    {
-      currentDropRow = row;
-      currentDropOperation = NSTableViewDropAbove;
-    }
+  NSParameterAssert(row > -1);
+  BOOL isPositionInsideMiddleQuartersOfRow = 
+    (positionInRow > _rowHeight / 4 && positionInRow <= (3 * _rowHeight) / 4);
+  BOOL isDropOn = (row > _numberOfRows || isPositionInsideMiddleQuartersOfRow); 
+
+  [self setDropRow: (isDropOn ? [self _computedRowAtPoint: p] : row)
+     dropOperation: (isDropOn ? NSTableViewDropOn : NSTableViewDropAbove)];
 }
 
 - (NSInteger) _dropRowFromQuarterPosition: (NSInteger)quarterPosition
@@ -6329,7 +6319,7 @@ view to drag. */
 {
   NSPoint p = [self convertPoint: [sender draggingLocation] fromView: nil];
   NSInteger positionInRow = (NSInteger)(p.y - _bounds.origin.y) % (int)_rowHeight;
-  NSInteger quarterPosition = (NSInteger)(p.y - _bounds.origin.y) / _rowHeight * 4.;
+  NSInteger quarterPosition = (NSInteger)([self _computedRowAtPoint: p] * 4.);
   NSInteger row = [self _dropRowFromQuarterPosition: quarterPosition];
   NSDragOperation dragOperation = [sender draggingSourceOperationMask];
   BOOL isSameDropTargetThanBefore = (lastQuarterPosition == quarterPosition
@@ -6340,10 +6330,15 @@ view to drag. */
   if (isSameDropTargetThanBefore)
     return currentDragOperation;
 
+  /* Remember current drop target */
   currentDragOperation = dragOperation;
   lastQuarterPosition = quarterPosition;
-
-  [self _setDropOperationAndRow: row usingPositionInRow: positionInRow atPoint: p];
+ 
+  /* The user can retarget this default drog using -setDropRow:dropOperation: 
+     in -tableView:validateDrop:proposedRow:proposedDropOperation:. */
+  [self _setDropOperationAndRow: row 
+             usingPositionInRow: positionInRow 
+                        atPoint: p];
 
   if ([_dataSource respondsToSelector: 
       @selector(tableView:validateDrop:proposedRow:proposedDropOperation:)])
@@ -6354,16 +6349,13 @@ view to drag. */
                               proposedDropOperation: currentDropOperation];
     }
   
-  /* The user might retarget the drop using -setDropRow:dropOperation: in
-     -tableView:validateDrop:proposedRow:proposedOperation:.
-
-     -setDropRow:dropOperation: can changes both currentDropRow and 
+  /* -setDropRow:dropOperation: can changes both currentDropRow and 
      currentDropOperation. Whether we have to redraw the drop indicator depends 
      on this change. */
   if (currentDropRow != oldDropRow || currentDropOperation != oldDropOperation)
     {
       [self _drawDropIndicator]; 
-      oldDropRow = currentDropRow;
+      oldDropRow = (currentDropRow > -1 ? currentDropRow : _numberOfRows);
       oldDropOperation = currentDropOperation;
     }