如何在选择NSOutlineView的行时设置背景颜色 [英] How to set background color while selecting row of NSOutlineView

问题描述

我有一个大问题，无法解决它。

I am having a big problem and not able to solve it.

我有一个 NSOutlineView 一个 NSButtonCell 它绑定到 arrayController 从它设置标题并根据某些值，通过代码在单元格背景中设置图像。

I have an NSOutlineView which contains a NSButtonCell which is bound to arrayController from there it is setting its Title and based on some value an Image is set in the cell background by codes.

使用这些代码设置图像

[cell setImage:[NSImage imageNamed:@"sbWarn.png"]];
[cell setImagePosition:NSImageOverlaps];
[cell setBackgroundColor:[NSColor clearColor]];

问题是当我选择一行时，所选行显示黑色背景。我尝试了所有可能的方式，如设置背景为clearColor等。

The problem is when I select a row the selected row shows a black background. I tried every possible ways like setting background as clearColor etc.

如何让它看起来不错。

How can I make it look good.

推荐答案

这种方法应该可行。它是从内存，所以没有保证，但一个快速模型似乎给出你正在寻找的结果：

This approach should work. It's from memory, so no guarantees, but a quick mockup seemed to give the results you are looking for:

// Outline view delegate

-(void)outlineView:(NSOutlineView *)outlineView willDisplayCell:(id)cell forTableColumn:(NSTableColumn *)tableColumn item:(id)item {

    NSUInteger rowNo = [outlineView rowForItem:item];

    NSColor *backgroundColor;
    if ( [[outlineView selectedRowIndexes] containsIndex:rowNo] ) {
        backgroundColor = // Highlighted color;
    }
    else {
        backgroundColor = // Normal background color;
    }

    [cell setBackgroundColor: backgroundColor];
}

在你的情况下，你当然只会应用单元格背景颜色

In your case you'll of course only apply the cell background color on the columns with button cells.

这是在 outlineView：dataCellForTableColumn：item：中创建的按钮单元格。 / p>

This is the button cell used, created in outlineView:dataCellForTableColumn:item:.

NSButtonCell *cell = [[NSButtonCell alloc] init];

[cell setBezelStyle:NSRegularSquareBezelStyle];
[cell setButtonType:NSToggleButton];
[cell setBordered:NO];
[cell setTitle:@""];
[cell setImage:[NSImage imageNamed:@"green.png"]];
[cell setAlternateImage:[NSImage imageNamed:@"red.png"]];
[cell setImagePosition:NSImageOverlaps];

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