objective-c - NSMatrix 有多个切换按钮？

Question

我正在尝试创建一个 NSButtonCell 的 NSMatrix ，其中可以选择零到四个按钮(打开)。我已尝试以下(测试)代码，但不确定如何提供我需要的功能。也许 NSMatrix 是不可能的，我需要寻找替代控件，或者创建自己的控件？

@interface MatrixView : NSView
{
    NSScrollView *_scrollView;
    NSMatrix *_matrixView;
}
@end

@implementation MatrixView

- (id)initWithFrame:(NSRect)frameRect
{
    NSLog(@"initWithFrame. frameRect=%@", NSStringFromRect(frameRect));
    self = [super initWithFrame:frameRect];
    if (self != nil)
    {
        _scrollView = [[NSScrollView alloc] initWithFrame:NSMakeRect(0, 0, frameRect.size.width, frameRect.size.height)];
        [_scrollView setBorderType:NSNoBorder];
        [_scrollView setHasVerticalScroller:YES];
        [_scrollView setHasHorizontalScroller:NO];
        [_scrollView setAutoresizingMask:NSViewWidthSizable|NSViewHeightSizable];

        NSSize contentSize = [_scrollView contentSize];
        contentSize.height = 300;

        // Make it 3 x however-many-buttons-will-fit-the-height
        CGFloat gap = 8.0;
        CGFloat width = (contentSize.width / 3.0) - (gap * 2.0);
        NSUInteger rows = (contentSize.height / (width + gap));

        NSLog(@"width=%f, rows=%lu", width, rows);

        NSButtonCell *prototype = [[NSButtonCell alloc] init];
        [prototype setTitle:@"Hello"];
        [prototype setButtonType:NSToggleButton];
        [prototype setShowsStateBy:NSChangeGrayCellMask];
        _matrixView = [[NSMatrix alloc] initWithFrame:NSMakeRect(0, 0, contentSize.width, contentSize.height)
                                                 mode:NSListModeMatrix
                                            prototype:prototype
                                         numberOfRows:rows
                                      numberOfColumns:3];
        [_matrixView setCellSize:NSMakeSize(width, width)];
        [_matrixView setIntercellSpacing:NSMakeSize(gap, gap)];
        [_matrixView setAllowsEmptySelection:YES];
        [_matrixView sizeToCells];
        [_scrollView setDocumentView:_matrixView];
        [self addSubview:_scrollView];
        [self setAutoresizesSubviews:YES];
        [prototype release];
    }

    return self;
}

...

Answer 1

我让它与 NSMatrix 的以下子类一起使用。我添加了一个属性 onCount，以跟踪有多少按钮处于打开状态:

@implementation RDMatrix
@synthesize onCount;

-(id) initWithParentView:(NSView *) cv {
    NSButtonCell *theCell = [[NSButtonCell alloc ]init];
    theCell.bezelStyle = NSSmallSquareBezelStyle;
    theCell.buttonType = NSPushOnPushOffButton;
    theCell.title = @"";
    if (self = [super initWithFrame:NSMakeRect(200,150,1,1) mode:2 prototype:theCell numberOfRows:4 numberOfColumns:4]){ 
        [self setSelectionByRect:FALSE];
        [self setCellSize:NSMakeSize(40,40)];
        [self sizeToCells];
        self.target = self;
        self.action = @selector(buttonClick:);
        self.drawsBackground = FALSE;
        self.autoresizingMask = 8;
        self.allowsEmptySelection = TRUE;
        self.mode = NSHighlightModeMatrix;
        self.onCount = 0;
        [cv addSubview:self];
        return self;
    }
    return nil;
}


-(IBAction)buttonClick:(NSMatrix *)sender {
    NSUInteger onOrOff =[sender.selectedCells.lastObject state];
    if (onOrOff) {
        self.onCount += 1;
    }else{
        self.onCount -= 1;
    }
    NSLog(@"%ld",self.onCount);
    if (self.onCount == 5) {
        [sender.selectedCells.lastObject setState:0];
        self.onCount -= 1;
    }    
}

当您尝试选择第五个按钮时，它会闪烁，然后熄灭。这可能会成为一个问题，具体取决于您如何使用这些按钮的状态。我刚刚用这种方法记录了它们:

-(IBAction)checkMatrix:(id)sender {
    NSIndexSet *indxs = [self.mat.cells indexesOfObjectsPassingTest:^BOOL(NSButtonCell *cell, NSUInteger idx, BOOL *stop) {
        return cell.state == NSOnState;
    }];
    NSLog(@"%@",indxs);
}

编辑后:我不喜欢我的第一种方法，当您尝试单击第五个按钮时，按钮会短暂闪烁，然后再次关闭。我发现了一个我认为更好的解决方案，涉及在矩阵子类中重写 mouseDown (如果您想尝试此操作，您应该删除 setAction 和 setTarget 语句并删除 buttonClick 方法):

-(void)mouseDown:(NSEvent *) event {
    NSPoint matPoint = [self convertPoint:event.locationInWindow fromView:nil];
    NSInteger row;
    NSInteger column;
    [self getRow:&row column:&column forPoint:matPoint];
    NSButtonCell *cell = [self cellAtRow:row column:column];
    if (self.onCount < 4 && cell.state == NSOffState) {
        cell.state = NSOnState;
        self.onCount += 1;
    }else if (cell.state == NSOnState) {
        cell.state = NSOffState;
        self.onCount -= 1;
    }
}