具有“填充”的NSTextField在右边 [英] NSTextField with "padding" on the right

问题描述

我想获得剩余的chars通知显示在我圆形的NSTextField和我得到它与两个NSTextFields的帮助下的Interface Builder，它已经看起来像：

我可以想到的唯一的事情是子类化NSTextField和做一些事情，所以它不绘制文本下的数字，但我不知道如何开始，需要真正一些帮助。

解决方案

最简单的方法可能是子类 NSTextFieldCell 并覆写 -drawInteriorWithFrame：inView：和 -selectWithFrame：inView：editor：delegate：start：length ：。

您需要决定为您的计数分配多少空间并在缩略空间中绘制。

你可以找到关于子类化的更多信息 NSCell 在Apple的 PhotoSearch示例代码中。

   - （void）drawInteriorWithFrame：（NSRect）bounds inView：（NSView *）controlView {
 NSRect titleRect = [self titleRectForBounds：bounds ]; 
 NSRect countRect = [self countAreaRectForBounds：bounds]; 
 
 titleRect = NSInsetRect（titleRect，2，0）; 
 
 NSAttributedString * title = [self attributStringValue]; 
 NSAttributedString * count = [self countAttributedString]; 
 
 if（title）
 [title drawInRect：titleRect]; 
 
 [count drawInRect：countRect]; 
} 
 
  - （void）selectWithFrame：（NSRect）aRect inView：（NSView *）controlView editor：（NSText *）textObj delegate：（id）anObject start：（NSInteger）selStart length ：（NSInteger）selLength {
 NSRect selectFrame = aRect; 
 NSRect countRect = [self countAreaRectForBounds：aRect]; 
 
 selectFrame.size.width  -  = countRect.size.width + PADDING_AROUND_COUNT; 
 
 [[NSNotificationCenter defaultCenter] addObserver：self selector：@selector（__ textChanged :) name：NSTextDidChangeNotification object：textObj]; 
 [super selectWithFrame：selectFrame inView：controlView editor：textObj delegate：anObject start：selStart length：selLength]; 
} 
 
  - （void）endEditing：（NSText *）editor {
 [[NSNotificationCenter defaultCenter] removeObserver：self name：NSTextDidChangeNotification object：editor]; 
 
 [super endEditing：editor]; 
} 
 
  - （void）__ textChanged：（NSNotification *）notif {
 [[self controlView] setNeedsDisplay：YES]; 
} 
  

I am trying to get the "remaining chars notice" to show up within my rounded NSTextField and I got it with two NSTextFields with help of the Interface Builder and it already looks like that:

But when I write a little bit more it looks like that:

The only thing I could think of is to subclass NSTextField and do something with it so it does not draw text under the number but I have no idea how to begin and need really some help with it.

解决方案

The simplest way is probably to subclass NSTextFieldCell and override -drawInteriorWithFrame:inView: and -selectWithFrame:inView:editor:delegate:start:length:.

You'll need to decide how much space to allocate for your count and draw in the abbreviated space. Something like this example code should work although this hasn't been tested in a rounded text field.

You can find more information about subclassing NSCell in Apple's PhotoSearch example code.

- (void)drawInteriorWithFrame:(NSRect)bounds inView:(NSView *)controlView {
    NSRect titleRect = [self titleRectForBounds:bounds];
    NSRect countRect = [self countAreaRectForBounds:bounds];

    titleRect = NSInsetRect(titleRect, 2, 0);

    NSAttributedString *title = [self attributedStringValue];
    NSAttributedString *count = [self countAttributedString];

    if (title)
        [title drawInRect:titleRect];

    [count drawInRect:countRect];
}

- (void)selectWithFrame:(NSRect)aRect inView:(NSView *)controlView editor:(NSText *)textObj delegate:(id)anObject start:(NSInteger)selStart length:(NSInteger)selLength {
    NSRect selectFrame = aRect;
    NSRect countRect = [self countAreaRectForBounds:aRect];

    selectFrame.size.width -= countRect.size.width + PADDING_AROUND_COUNT;

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(__textChanged:) name:NSTextDidChangeNotification object:textObj];
    [super selectWithFrame:selectFrame inView:controlView editor:textObj delegate:anObject start:selStart length:selLength];
}

- (void)endEditing:(NSText *)editor {
    [[NSNotificationCenter defaultCenter] removeObserver:self name:NSTextDidChangeNotification object:editor];

    [super endEditing:editor];
}

- (void)__textChanged:(NSNotification *)notif {
    [[self controlView] setNeedsDisplay:YES];
}

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