* Images/common_StepperDown.tiff,

* Images/common_StepperDownHighlighted.tiff,
* Images/common_StepperUp.tiff,
* Images/common_StepperUpHighlighted.tiff: new images with arrows
similar to scroll view buttons'.

* Source/GSThemeDrawing.m (stepperUpButtonRectWithFrame:),
(stepperDownButtonRectWithFrame:): center buttons horizontally; simplify
and cleanup.

* Source/NSStepper.m (acceptsFirstResponder): return NO. Returning
YES makes sense only if `keyDown:` is implemented.
(acceptsFirstMouse:): return YES.

* Source/NSStepperCell.m (cellSize): initial implementation. Retruns
minimum size based on up and button sizes.

ChangeLog

@@ -1,3 +1,22 @@
+2020-01-10  Sergii Stoian  <stoyan255@gmail.com>
+
+	* Images/common_StepperDown.tiff,
+	* Images/common_StepperDownHighlighted.tiff,
+	* Images/common_StepperUp.tiff,
+	* Images/common_StepperUpHighlighted.tiff: new images with arrows
+	similar to scroll view buttons'.
+
+	* Source/GSThemeDrawing.m (stepperUpButtonRectWithFrame:),
+	(stepperDownButtonRectWithFrame:): center buttons horizontally; simplify
+	and cleanup.
+
+	* Source/NSStepper.m (acceptsFirstResponder): return NO. Returning
+	YES makes sense only if `keyDown:` is implemented.
+	(acceptsFirstMouse:): return YES.
+
+	* Source/NSStepperCell.m (cellSize): initial implementation. Retruns
+	minimum size based on up and button sizes.
+
 2020-01-07 Fred Kiefer <FredKiefer@gmx.de>
 
         * Headers/AppKit/NSDatePicker.h,

Source/GSThemeDrawing.m

@@ -722,22 +722,20 @@
 - (NSRect) stepperUpButtonRectWithFrame: (NSRect)frame
 {
   NSSize size = [[NSImage imageNamed: @"common_StepperUp"] size];
-  NSRect upRect;
+  NSRect upRect = {{NSMinX(frame), NSMinY(frame)}, {size.width, size.height}};
 
-  upRect.size = size;
-  upRect.origin.x = NSMaxX(frame) - size.width;
-  upRect.origin.y = NSMinY(frame) + ((int)frame.size.height / 2) + 1;
+  upRect.origin.x += ((int)frame.size.width / 2) - ((int)size.width / 2);
+  upRect.origin.y += ((int)frame.size.height / 2);
   return upRect;
 }
 
 - (NSRect) stepperDownButtonRectWithFrame: (NSRect)frame
 {
   NSSize size = [[NSImage imageNamed: @"common_StepperDown"] size];
-  NSRect downRect;
+  NSRect downRect = {{NSMinX(frame), NSMinY(frame)}, {size.width, size.height}};
 
-  downRect.size = size;
-  downRect.origin.x = NSMaxX(frame) - size.width;
-  downRect.origin.y = NSMinY(frame) + ((int)frame.size.height / 2) - size.height + 1;
+  downRect.origin.x += ((int)frame.size.width / 2) - ((int)size.width / 2);
+  downRect.origin.y += ((int)frame.size.height / 2) - size.height;
   return downRect;
 }
 

Source/NSStepper.m

@@ -85,6 +85,17 @@ id _nsstepperCellClass = nil;
   return YES;
 }
 
+- (BOOL)acceptsFirstResponder
+{
+  // FIXME: change to `YES` after `keyDown:` implementation.
+  return NO;
+}
+
+- (BOOL) acceptsFirstMouse: (NSEvent *)theEvent
+{
+  return YES;
+}
+
 - (void) keyDown: (NSEvent*)theEvent
 {
   // FIXME

Source/NSStepperCell.m

@@ -346,6 +346,24 @@
   return mouseWentUp;
 }
 
+- (NSSize) cellSize
+{
+  NSRect upRect = [[GSTheme theme]
+                    stepperUpButtonRectWithFrame: [_control_view bounds]];
+  NSRect downRect = [[GSTheme theme]
+                      stepperDownButtonRectWithFrame: [_control_view bounds]];
+  NSSize size;
+
+  if (upRect.size.width > downRect.size.width)
+    size.width = upRect.size.width;
+  else
+    size.width = downRect.size.width;
+
+  size.height = upRect.size.height + downRect.size.height;
+
+  return size;
+}
+
 //
 // NSCoding protocol
 //