cocoa - NSComboBox 对焦环未正确对齐

Question

当我创建 NSComboBox 并将控件尺寸设置为较小时，聚焦环未正确对齐。我在 xcode 界面中注意到同样的问题(cfr.截图)。

欢迎您的帮助。

Answer 1

我今天在 bugreport.apple.com 上报告了这一点作为雷达# 20852031

我的解决方法是子类化 NSComboBoxCell:

- (void)drawFocusRingMaskWithFrame:(NSRect)cellFrame inView:(NSView *)controlView
{
    NSRect          focusRect   = cellFrame;

    focusRect.origin.y      += 1.0f;
    focusRect.size.width    -= 3.0f;
    focusRect.size.height   -= 5.0f;

    //  NSBezierPath *focusPath = [NSBezierPath bezierPathWithRoundedRect:focusRect
    //                                                            xRadius:2.0f
    //                                                            yRadius:2.0f];

    NSBezierPath    *focusPath  = [NSBezierPath bezierPath];
    CGFloat         leftRadius  = 2.0f;
    CGFloat         rightRadius = 5.0f;

    [focusPath moveToPoint:NSMakePoint(focusRect.origin.x + leftRadius, focusRect.origin.y)];

    [focusPath lineToPoint:NSMakePoint(focusRect.origin.x + focusRect.size.width - rightRadius, focusRect.origin.y)];
    [focusPath curveToPoint:NSMakePoint(focusRect.origin.x + focusRect.size.width, focusRect.origin.y + rightRadius)
              controlPoint1:NSMakePoint(focusRect.origin.x + focusRect.size.width, focusRect.origin.y)
              controlPoint2:NSMakePoint(focusRect.origin.x + focusRect.size.width, focusRect.origin.y)];

    [focusPath lineToPoint:NSMakePoint(focusRect.origin.x + focusRect.size.width, focusRect.origin.y + focusRect.size.height - rightRadius)];
    [focusPath curveToPoint:NSMakePoint(focusRect.origin.x + focusRect.size.width - rightRadius, focusRect.origin.y + focusRect.size.height)
              controlPoint1:NSMakePoint(focusRect.origin.x + focusRect.size.width, focusRect.origin.y + focusRect.size.height)
              controlPoint2:NSMakePoint(focusRect.origin.x + focusRect.size.width, focusRect.origin.y + focusRect.size.height)];

    [focusPath lineToPoint:NSMakePoint(focusRect.origin.x + leftRadius, focusRect.origin.y + focusRect.size.height)];
    [focusPath curveToPoint:NSMakePoint(focusRect.origin.x, focusRect.origin.y + focusRect.size.height - leftRadius)
              controlPoint1:NSMakePoint(focusRect.origin.x, focusRect.origin.y + focusRect.size.height)
              controlPoint2:NSMakePoint(focusRect.origin.x, focusRect.origin.y + focusRect.size.height)];

    [focusPath lineToPoint:NSMakePoint(focusRect.origin.x, focusRect.origin.y + leftRadius)];
    [focusPath curveToPoint:NSMakePoint(focusRect.origin.x + leftRadius, focusRect.origin.y)
              controlPoint1:NSMakePoint(focusRect.origin.x, focusRect.origin.y)
              controlPoint2:NSMakePoint(focusRect.origin.x, focusRect.origin.y)];

    [NSGraphicsContext saveGraphicsState];
    {
        [focusPath fill];
    }
    [NSGraphicsContext restoreGraphicsState];
}