如何检测在 winforms 控件上按住的鼠标按钮？
我想实现一个自定义滚动条，但希望它像标准滚动条一样工作。 因此，我需要检测鼠标按钮是否按住栏末端的向上或向下箭头，以便用户可以使用栏末端滚动。
如何检测按钮是否被按住？
MouseDown 仅在第一次按下按钮时触发一次。 当释放按钮时，MouseUp 将触发，但是有没有比在 MouseDown 和 MouseUp 之间定期触发某种计时器更好的方法呢？
I want to implement a custom scrollbar but want it to work like the standard one. So I need to detect that the mouse button is held down over either the up or down arrow at the ends of the bar so that the user can scroll using the bar ends.
How can I detect that the button is being held?
MouseDown only fires once when the button is first pressed. MouseUp will fire when the button is released but is there a better way than to have some sort of timer that triggers periodically between MouseDown and MouseUp?
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我认为您不会比使用计时器做得更好（尽管我可能会感到惊讶）。
我之前出于同样的目的使用过 Timer，它们的工作原理通常是这样的：
TimerStart()，使用按钮按下时的间隔约为200毫秒。 此时鼠标也被捕获。Tick都会产生一次滚动。 （第一个Tick还将间隔更改为 ~25ms）Timer.Stop()s。Interval从200更改为25意味着他们必须按住鼠标一段时间，但一旦这样做，滚动行动发生得更快/更顺利。“按住”按钮实际上不是一个事件，它更多的是一种状态（即它不会在特定时间点发生）。
I don't think you're going to be able to do better than using a
Timer(although I may be surprised).I've used
Timers before for the same purpose, and they work, usually like this:TimerStart()s, using anIntervalof ~200ms when the button goes down. The mouse is alsoCaptured at this point.Tickeffects a scroll. (The firstTickalso changes the interval to ~25ms)Timer.Stop()s.The changing of the
Intervalfrom200to25means that they have to hold the mouse down for a while, but once they do, the scrolling action happens more quickly/smoothly.The button being "held" really isn't an event, it's more of a state (i.e. it doesn't occur at a specific point in time).