Cocoa 鼠标悬停时亮起的可可按钮
是否可以设置一个标志,当鼠标滑过可可按钮时,该标志将使可可按钮高亮显示。我需要在OSX上用objective C编程实现这一点 使用设置视图的跟踪区域(前提是您使用的是Leopard或更新的OS X)。您将在鼠标进入和鼠标退出时获得事件。下面的内容可能就是答案Cocoa 鼠标悬停时亮起的可可按钮,cocoa,button,highlighting,Cocoa,Button,Highlighting,是否可以设置一个标志,当鼠标滑过可可按钮时,该标志将使可可按钮高亮显示。我需要在OSX上用objective C编程实现这一点 使用设置视图的跟踪区域(前提是您使用的是Leopard或更新的OS X)。您将在鼠标进入和鼠标退出时获得事件。下面的内容可能就是答案 class HoverButton: NSButton{ var backgroundColor: NSColor? var hoveredBackgroundColor: NSColor? var pressedBackgroundC
class HoverButton: NSButton{
var backgroundColor: NSColor?
var hoveredBackgroundColor: NSColor?
var pressedBackgroundColor: NSColor?
private var hovered: Bool = false
override var wantsUpdateLayer:Bool{
return true
}
required init?(coder: NSCoder) {
super.init(coder: coder)
self.commonInit()
}
override init(frame frameRect: NSRect) {
super.init(frame: frameRect)
self.commonInit()
}
func commonInit(){
self.wantsLayer = true
self.createTrackingArea()
self.hovered = false
self.hoveredBackgroundColor = NSColor.selectedTextBackgroundColor()
self.pressedBackgroundColor = NSColor.selectedTextBackgroundColor()
self.backgroundColor = NSColor.clearColor()
}
private var trackingArea: NSTrackingArea!
func createTrackingArea(){
if(self.trackingArea != nil){
self.removeTrackingArea(self.trackingArea!)
}
let circleRect = self.bounds
let flag = NSTrackingAreaOptions.MouseEnteredAndExited.rawValue + NSTrackingAreaOptions.ActiveInActiveApp.rawValue
self.trackingArea = NSTrackingArea(rect: circleRect, options: NSTrackingAreaOptions(rawValue: flag), owner: self, userInfo: nil)
self.addTrackingArea(self.trackingArea)
}
override func mouseEntered(theEvent: NSEvent) {
self.hovered = true
NSCursor.pointingHandCursor().set()
self.needsDisplay = true
}
override func mouseExited(theEvent: NSEvent) {
self.hovered = false
NSCursor.arrowCursor().set()
self.needsDisplay = true
}
override func updateLayer() {
if(hovered){
if (self.cell!.highlighted){
self.layer?.backgroundColor = pressedBackgroundColor?.CGColor
}
else{
self.layer?.backgroundColor = hoveredBackgroundColor?.CGColor
}
}
else{
self.layer?.backgroundColor = backgroundColor?.CGColor
}
}
}
链接:也可以覆盖按钮单元格,将鼠标进入/退出事件传播到视图。我并没有测试所有的按钮样式,我使用嵌入式样式 如果
仅显示顺序而emouseinded
为true,则在鼠标指针上调用drawBezel
函数。
这就是为什么我简单地覆盖它,并在按钮中管理我的自定义显示行为
class myButtonCell: NSButtonCell {
override func mouseEntered(with event: NSEvent) {
controlView?.mouseEntered(with: event)
// Comment this to remove title highlight (for button style)
super.mouseEntered(with: event)
}
override func mouseExited(with event: NSEvent) {
controlView?.mouseExited(with: event)
// Comment this to remove title un-highlight (for recessed button style)
// Here, we un-hilight the title only if the button is not selected
if state != .on { super.mouseExited(with: event) }
}
// removes the default highlight behavior
override func drawBezel(withFrame frame: NSRect, in controlView: NSView) {}
}
// Set the cell class to MyButtonCell in interface builder
class MyButton: NSButton {
var mouseIn: Bool = false { didSet {
// Up to you here - setNeedsDisplay() or layer update
}}
override func mouseEntered(with event: NSEvent) { mouseIn = true }
override func mouseExited(with event: NSEvent) { mouseIn = false }
}
您能解释一下如何使用代码(至少用一些示例…)来实现这一点吗?