NSTextFieldCell垂直对齐,解决方案似乎挤压水平对齐

Question

我有一个NSTextFieldCell,我想用中间垂直对齐显示.感谢这里的旧问题和博客文章,我有两个有效的解决方案.

然而,这两种解决方案似乎都压低了我将细胞设置为右对齐的能力.任何人都可以帮助我使这些解决方案中的任何一种都支持这两种形式

以下是一个解决方案的代码:

@implementation MiddleAlignedTextFieldCell

- (NSRect)titleRectForBounds:(NSRect)theRect {
    NSRect titleFrame = [super titleRectForBounds:theRect];
    NSSize titleSize = [[self attributedStringValue] size];
    titleFrame.origin.y = theRect.origin.y - .5 + (theRect.size.height - titleSize.height) / 2.0;
    return titleFrame;
}

- (void)drawInteriorWithFrame:(NSRect)cellFrame inView:(NSView *)controlView {
    NSRect titleRect = [self titleRectForBounds:cellFrame];
    [[self attributedStringValue] drawInRect:titleRect];
}

@end

另一种解决方案是(从这个博客获得):

@implementation RSVerticallyCenteredTextFieldCell

- (NSRect)drawingRectForBounds:(NSRect)theRect
{
    NSRect newRect = [super drawingRectForBounds:theRect];

    if (mIsEditingOrSelecting == NO)
    {
        // Get our ideal size for current text
        NSSize textSize = [self cellSizeForBounds:theRect];

        // Center that in the proposed rect
        float heightDelta = newRect.size.height - textSize.height;  
        if (heightDelta > 0)
        {
            newRect.size.height -= heightDelta;
            newRect.origin.y += (heightDelta / 2);
        }
    }

    return newRect;
}

- (void)selectWithFrame:(NSRect)aRect inView:(NSView *)controlView editor:(NSText *)textObj delegate:(id)anObject start:(int)selStart length:(int)selLength
{
    aRect = [self drawingRectForBounds:aRect];
    mIsEditingOrSelecting = YES;    
    [super selectWithFrame:aRect inView:controlView editor:textObj delegate:anObject start:selStart length:selLength];
    mIsEditingOrSelecting = NO;
}

- (void)editWithFrame:(NSRect)aRect inView:(NSView *)controlView editor:(NSText *)textObj delegate:(id)anObject event:(NSEvent *)theEvent
{   
    aRect = [self drawingRectForBounds:aRect];
    mIsEditingOrSelecting = YES;
    [super editWithFrame:aRect inView:controlView editor:textObj delegate:anObject event:theEvent];
    mIsEditingOrSelecting = NO;
}

@end

Answer 1

我发布这个问题的答案,因为它确实有效,但是,我发现我无法找到另一种检查IB对齐设置的方法非常烦人.访问_cFlags似乎有点脏,我很想找到一个更干净的方法.

基于此博客条目之前发布的代码.

- (NSRect)drawingRectForBounds:(NSRect)theRect
{
    // Get the parent's idea of where we should draw
    NSRect newRect = [super drawingRectForBounds:theRect];

    if (mIsEditingOrSelecting == NO)
    {
        // Get our ideal size for current text
        NSSize textSize = [self cellSizeForBounds:theRect];

        // Center that in the proposed rect
        float heightDelta = newRect.size.height - textSize.height;  
        if (heightDelta > 0)
        {
            newRect.size.height -= heightDelta;
            newRect.origin.y += (heightDelta / 2);
        }

        // For some reason right aligned text doesn't work.  This section makes it work if set in IB.
        // HACK: using _cFlags isn't a great idea, but I couldn't find another way to find the alignment.
        // TODO: replace _cFlags usage if a better solution is found.
        float widthDelta = newRect.size.width - textSize.width;
        if (_cFlags.alignment == NSRightTextAlignment && widthDelta > 0) {
            newRect.size.width -= widthDelta;
            newRect.origin.x += widthDelta;
        }

    }

    return newRect;
}