在 NSTableView 文本单元格中创建和响应超链接
Create and Respond to a Hyperlink within a NSTableView Text Cell
我有一个程序,其中包含一个 NSTableView,其中填充了要上传的文件。发送文件后,带有文件名的文本单元格会得到一个 hyperlink 放入其中(数组数据被赋予一个带有 NSLinkAttributeName 属性的 NSMutableString)。如何允许用户单击此 link 以在其默认浏览器中打开网页?
文本字段自动支持点击嵌入式链接,但前提是它们至少可以选择(如果不可编辑)。因此,将您的文本字段设置为可选。
经过多次搜索和尝试多种方法,这就是我想出的解决方案。
创建一个扩展 NSTableViewCell 的自定义 class:
class TableViewCellCursor: NSTableCellView {
internal var active = false
//MARK: - View Life Cycle
override func awakeFromNib() {
superview?.awakeFromNib()
self.createTrackingArea()
}
//MARK: - IBActions
override func mouseEntered(theEvent: NSEvent) {
if (NSCursor.currentCursor() == NSCursor.arrowCursor() && active) {
NSCursor.pointingHandCursor().set()
}
}
override func mouseExited(theEvent: NSEvent) {
if (NSCursor.currentCursor() == NSCursor.pointingHandCursor() && active) {
NSCursor.arrowCursor().set()
}
}
//Informs the receiver that the mouse cursor has moved into a cursor rectangle.
override func cursorUpdate(event: NSEvent) {
if (active) {
NSCursor.pointingHandCursor().set()
}
}
//MARK: - Util
func createTrackingArea() {
var focusTrackingAreaOptions:NSTrackingAreaOptions = NSTrackingAreaOptions.ActiveInActiveApp
focusTrackingAreaOptions |= NSTrackingAreaOptions.MouseEnteredAndExited
focusTrackingAreaOptions |= NSTrackingAreaOptions.AssumeInside
focusTrackingAreaOptions |= NSTrackingAreaOptions.InVisibleRect
var focusTrackingArea:NSTrackingArea = NSTrackingArea(rect: NSZeroRect,
options: focusTrackingAreaOptions,
owner: self, userInfo: nil)
self.addTrackingArea(focusTrackingArea)
}
}
在 NSTableView 选择更改时检查第一响应者状态。这是必要的,因为可以更改 table 的选择,即使它不是 firstResponder:
func tableViewSelectionDidChange(aNotification: NSNotification) {
if (self.firstResponder == filesToTransferTable) {
changeSelectedRowTextColorTo(NSColor.whiteColor(), unselectedColor: NSColor.blueColor())
} else {
changeSelectedRowTextColorTo(NSColor.blackColor(), unselectedColor: NSColor.blueColor())
}
}
func changeSelectedRowTextColorTo(selectedColor: NSColor, unselectedColor: NSColor) {
let selectedRows = filesToTransferTable.selectedRowIndexes
for (index, tableEntry) in enumerate (tableData) {
if tableData[index]["FileName"] is NSMutableAttributedString {
var name = tableData[index]["FileName"] as! NSMutableAttributedString
var range = NSMakeRange(0, NSString(string:name.string).length)
name.beginEditing()
name.removeAttribute(NSForegroundColorAttributeName, range: range)
if (selectedRows.containsIndex(index)) {
name.addAttribute(NSForegroundColorAttributeName, value:selectedColor, range:range)
} else {
name.addAttribute(NSForegroundColorAttributeName, value:unselectedColor, range:range)
}
name.endEditing()
tableData[index]["FileName"] = name
}
filesToTransferTable.reloadDataForRowIndexes(NSIndexSet(index: index), columnIndexes: NSIndexSet(index:0))
}
}
添加 KVO 以检查 FirstResponder 何时更改:
//This is somewhere in your code where you initialize things
//KVO for first responder behavior regarding tableView and updating attributedStrings' colors
self.addObserver(self, forKeyPath: "firstResponder", options: NSKeyValueObservingOptions.Old | NSKeyValueObservingOptions.New, context: nil)
override func observeValueForKeyPath(keyPath: String, ofObject object: AnyObject, change: [NSObject : AnyObject], context: UnsafeMutablePointer<Void>) {
if (change[NSKeyValueChangeNewKey] is NSTableView) {
changeSelectedRowTextColorTo(NSColor.whiteColor(), unselectedColor: NSColor.blueColor())
} else if (change[NSKeyValueChangeOldKey] is NSTableView) {
changeSelectedRowTextColorTo(NSColor.blackColor(), unselectedColor: NSColor.blueColor())
}
}
最后,检查主要 window(应用程序本身)是否处于焦点(如果没有这样做,那么当 window 失去焦点时颜色将不会适当改变):
//Put these in the same place as the KVO code
NSNotificationCenter.defaultCenter().addObserver(self, selector: "windowDidBecomeKey:",
name: NSWindowDidBecomeKeyNotification , object: self)
NSNotificationCenter.defaultCenter().addObserver(self, selector: "windowDidResignKey:",
name: NSWindowDidResignKeyNotification , object: self)
func windowDidBecomeKey(notification: NSNotification) {
if (self.firstResponder == filesToTransferTable) {
changeSelectedRowTextColorTo(NSColor.whiteColor(), unselectedColor: NSColor.blueColor())
} else {
changeSelectedRowTextColorTo(NSColor.blackColor(), unselectedColor: NSColor.blueColor())
}
}
func windowDidResignKey(notification: NSNotification) {
if (self.firstResponder == filesToTransferTable) {
changeSelectedRowTextColorTo(NSColor.blackColor(), unselectedColor: NSColor.blueColor())
}
}
我有一个程序,其中包含一个 NSTableView,其中填充了要上传的文件。发送文件后,带有文件名的文本单元格会得到一个 hyperlink 放入其中(数组数据被赋予一个带有 NSLinkAttributeName 属性的 NSMutableString)。如何允许用户单击此 link 以在其默认浏览器中打开网页?
文本字段自动支持点击嵌入式链接,但前提是它们至少可以选择(如果不可编辑)。因此,将您的文本字段设置为可选。
经过多次搜索和尝试多种方法,这就是我想出的解决方案。
创建一个扩展 NSTableViewCell 的自定义 class:
class TableViewCellCursor: NSTableCellView {
internal var active = false
//MARK: - View Life Cycle
override func awakeFromNib() {
superview?.awakeFromNib()
self.createTrackingArea()
}
//MARK: - IBActions
override func mouseEntered(theEvent: NSEvent) {
if (NSCursor.currentCursor() == NSCursor.arrowCursor() && active) {
NSCursor.pointingHandCursor().set()
}
}
override func mouseExited(theEvent: NSEvent) {
if (NSCursor.currentCursor() == NSCursor.pointingHandCursor() && active) {
NSCursor.arrowCursor().set()
}
}
//Informs the receiver that the mouse cursor has moved into a cursor rectangle.
override func cursorUpdate(event: NSEvent) {
if (active) {
NSCursor.pointingHandCursor().set()
}
}
//MARK: - Util
func createTrackingArea() {
var focusTrackingAreaOptions:NSTrackingAreaOptions = NSTrackingAreaOptions.ActiveInActiveApp
focusTrackingAreaOptions |= NSTrackingAreaOptions.MouseEnteredAndExited
focusTrackingAreaOptions |= NSTrackingAreaOptions.AssumeInside
focusTrackingAreaOptions |= NSTrackingAreaOptions.InVisibleRect
var focusTrackingArea:NSTrackingArea = NSTrackingArea(rect: NSZeroRect,
options: focusTrackingAreaOptions,
owner: self, userInfo: nil)
self.addTrackingArea(focusTrackingArea)
}
}
在 NSTableView 选择更改时检查第一响应者状态。这是必要的,因为可以更改 table 的选择,即使它不是 firstResponder:
func tableViewSelectionDidChange(aNotification: NSNotification) {
if (self.firstResponder == filesToTransferTable) {
changeSelectedRowTextColorTo(NSColor.whiteColor(), unselectedColor: NSColor.blueColor())
} else {
changeSelectedRowTextColorTo(NSColor.blackColor(), unselectedColor: NSColor.blueColor())
}
}
func changeSelectedRowTextColorTo(selectedColor: NSColor, unselectedColor: NSColor) {
let selectedRows = filesToTransferTable.selectedRowIndexes
for (index, tableEntry) in enumerate (tableData) {
if tableData[index]["FileName"] is NSMutableAttributedString {
var name = tableData[index]["FileName"] as! NSMutableAttributedString
var range = NSMakeRange(0, NSString(string:name.string).length)
name.beginEditing()
name.removeAttribute(NSForegroundColorAttributeName, range: range)
if (selectedRows.containsIndex(index)) {
name.addAttribute(NSForegroundColorAttributeName, value:selectedColor, range:range)
} else {
name.addAttribute(NSForegroundColorAttributeName, value:unselectedColor, range:range)
}
name.endEditing()
tableData[index]["FileName"] = name
}
filesToTransferTable.reloadDataForRowIndexes(NSIndexSet(index: index), columnIndexes: NSIndexSet(index:0))
}
}
添加 KVO 以检查 FirstResponder 何时更改:
//This is somewhere in your code where you initialize things
//KVO for first responder behavior regarding tableView and updating attributedStrings' colors
self.addObserver(self, forKeyPath: "firstResponder", options: NSKeyValueObservingOptions.Old | NSKeyValueObservingOptions.New, context: nil)
override func observeValueForKeyPath(keyPath: String, ofObject object: AnyObject, change: [NSObject : AnyObject], context: UnsafeMutablePointer<Void>) {
if (change[NSKeyValueChangeNewKey] is NSTableView) {
changeSelectedRowTextColorTo(NSColor.whiteColor(), unselectedColor: NSColor.blueColor())
} else if (change[NSKeyValueChangeOldKey] is NSTableView) {
changeSelectedRowTextColorTo(NSColor.blackColor(), unselectedColor: NSColor.blueColor())
}
}
最后,检查主要 window(应用程序本身)是否处于焦点(如果没有这样做,那么当 window 失去焦点时颜色将不会适当改变):
//Put these in the same place as the KVO code
NSNotificationCenter.defaultCenter().addObserver(self, selector: "windowDidBecomeKey:",
name: NSWindowDidBecomeKeyNotification , object: self)
NSNotificationCenter.defaultCenter().addObserver(self, selector: "windowDidResignKey:",
name: NSWindowDidResignKeyNotification , object: self)
func windowDidBecomeKey(notification: NSNotification) {
if (self.firstResponder == filesToTransferTable) {
changeSelectedRowTextColorTo(NSColor.whiteColor(), unselectedColor: NSColor.blueColor())
} else {
changeSelectedRowTextColorTo(NSColor.blackColor(), unselectedColor: NSColor.blueColor())
}
}
func windowDidResignKey(notification: NSNotification) {
if (self.firstResponder == filesToTransferTable) {
changeSelectedRowTextColorTo(NSColor.blackColor(), unselectedColor: NSColor.blueColor())
}
}