NSOutlineView 控制高亮和缩进
在我的大纲视图中，我使用的是 CustomCell，它只不过是从 Cocoa ImageTextCellRefrenceCode 中获取代码并进行了一些修改，
是否可以更改单元格的突出显示颜色？
到目前为止我已经做了以下工作， - (void)drawWithFrame:(NSRect)cellFrame inView:(NSView *)controlView {
if([self isHighlighted]){
NSColor *evenColor = [NSColor colorWithCalibratedRed:.1 green:0.1 blue: 0.1
alpha:1.0];
[evenColor set];
NSRectFill(cellFrame);
bSelected = YES;
}
}
这是有效的，但是发生了什么，我可以看到，突出显示单元格颜色首先从系统默认颜色开始，然后，它将被 EvenColor 覆盖， 我觉得问题是 cellFrame.origin.x，它不是从 0 开始，
应用这段代码后的输出如下
----- My Custom Cell ----------------
======================================
| blue | |
| color| even Color |
| | |
======================================
以及我所期望的
----- My Custom Cell ----------------
======================================
| |
| even Color |
| |
======================================
In my Outline view, i am using CustomCell, which is nothing but took the code from Cocoa ImageTextCell RefrenceCode with some modification,
Is it possible to change the highlight color for a cell ?
So far i have done following,
- (void)drawWithFrame:(NSRect)cellFrame inView:(NSView *)controlView {
if([self isHighlighted]){
NSColor *evenColor = [NSColor colorWithCalibratedRed:.1 green:0.1 blue: 0.1
alpha:1.0];
[evenColor set];
NSRectFill(cellFrame);
bSelected = YES;
}
}
This is working but what is happening, i could see, hightlight cell color first start from system default color, then, it will get override by evenColor,
I feel the problem is cellFrame.origin.x, its not starting from 0,
output was as below after applying this piece of code
----- My Custom Cell ----------------
======================================
| blue | |
| color| even Color |
| | |
======================================
and what i was expecting
----- My Custom Cell ----------------
======================================
| |
| even Color |
| |
======================================
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突出显示由 NSOutlineView 处理（实际上，它是从 NSTableView 继承的行为）。无论如何，您不应该关注单元格，而应该查看子类化
NSOutlineView并覆盖highlightSelectionInClipRect:。这就是您应该进行自定义突出显示绘图的地方。The highlighting is handled by the
NSOutlineView(well, actually, it's inherited behavior fromNSTableView). Anyway, instead of focusing on the cell, you should take a look at subclassingNSOutlineViewand overridinghighlightSelectionInClipRect:. That's where you should do your custom highlight drawing.