Added -setMinimumWidth/minimumWidth to CPMenu.

Reviewed by me.

AppKit/CPMenu/CPMenu.j

@@ -253,6 +253,8 @@ var _CPMenuBarVisible               = NO,
         
         _autoenablesItems = YES;
         _showsStateColumn = YES;
+
+        [self setMinimumWidth:0];
     }
     
     return self;
@@ -649,6 +651,16 @@ var _CPMenuBarVisible               = NO,
     return _title;
 }
 
+- (void)setMinimumWidth:(float)aMinimumWidth
+{
+    _minimumWidth = aMinimumWidth;
+}
+
+- (float)minimumWidth
+{
+    return _minimumWidth;
+}
+
 //
 - (void)popUpMenuPositioningItem:(CPMenuItem)anItem atLocation:(CGPoint)aLocation inView:(CPView)aView callback:(Function)aCallback
 {
@@ -965,6 +977,8 @@ var CPMenuTitleKey              = @"CPMenuTitleKey",
         [self _setMenuName:[aCoder decodeObjectForKey:CPMenuNameKey]];
 
         _showsStateColumn = ![aCoder containsValueForKey:CPMenuShowsStateColumnKey] || [aCoder decodeBoolForKey:CPMenuShowsStateColumnKey];
+
+        [self setMinimumWidth:0];
     }
     
     return self;

AppKit/CPMenu/_CPMenuWindow.j

@@ -63,6 +63,7 @@ var STICKY_TIME_INTERVAL        = 500,
 
     [menuWindow setFont:aFont];
     [menuWindow setMenu:aMenu];
+    [menuWindow setMinWidth:[aMenu minimumWidth]];
 
     return menuWindow;
 }
@@ -210,8 +211,8 @@ var STICKY_TIME_INTERVAL        = 500,
 
 - (void)setMinWidth:(float)aWidth
 {
-    var size = [self frame].size;
-    
+    var size = [self unconstrainedFrame].size;
+
     [self setFrameSize:CGSizeMake(MAX(size.width, aWidth), size.height)];
 }
 
@@ -276,6 +277,11 @@ var STICKY_TIME_INTERVAL        = 500,
     [super setFrame:_CGRectMake(aPoint.x, aPoint.y, _CGRectGetWidth(_unconstrainedFrame), _CGRectGetHeight(_unconstrainedFrame))];
 }
 
+- (void)setFrameSize:(CGSize)aSize
+{
+    [super setFrame:_CGRectMake(_CGRectGetMinX(_unconstrainedFrame), _CGRectGetMinY(_unconstrainedFrame), aSize.width, aSize.height)];
+}
+
 - (void)setFrame:(CGRect)aFrame display:(BOOL)shouldDisplay animate:(BOOL)shouldAnimate
 {
     // FIXME: There are integral window issues with platform windows.

AppKit/CPPopUpButton.j

@@ -654,6 +654,8 @@ CPPopUpButtonStatePullsDown = CPThemeState("pulls-down");
             location = CGPointMake(0.0, 0.0);
     }
 
+    [[self menu] setMinimumWidth:CGRectGetWidth(bounds)];
+
     [[self menu]
         popUpMenuPositioningItem:positionedItem
                       atLocation:location