I want to start a tweetie-like app to learn macruby & cocoa, when display status list,I use NSTableView,and I must calculate the row height with `def tableView(table,heightOfRow:row);end` myself ,right? After googled a while,I found the way ,like this:
framework 'cocoa'
class String
def height_with_width(width=100)
attributes = {}
attributes[NSFontAttributeName.to_sym] = NSFont.fontWithName("Lucida Grande", size:12)
attributes[NSParagraphStyleAttributeName.to_sym] = NSParagraphStyle.defaultParagraphStyle
text_storage = NSTextStorage.alloc.initWithString(self)
text_container = NSTextContainer.alloc.initWithContainerSize([width,1000])
layout_manager = NSLayoutManager.alloc.init
layout_manager.addTextContainer(text_container)
text_storage.addLayoutManager(layout_manager)
text_storage.addAttributes(attributes, range:NSMakeRange(0, text_storage.length))
text_container.setLineFragmentPadding(0.0)
layout_manager.glyphRangeForTextContainer(text_container)
layout_manager.usedRectForTextContainer(text_container).size.height
end
end
puts "a".height_with_width #15
puts "b".height_with_width #15
puts "ab".height_with_width #15
puts "中".height_with_width #18
puts "ak中".height_with_width #19
puts "ak中".height_with_width(1) #15+15+18
because the chinese characters, the height of a line is diffence, I want it to be same ,like all return 19 , How Can I Fix This ? HELP!