What is the difference between valuechangedfcn and valuechangingfcn?
9 次查看(过去 30 天)
显示 更早的评论
Some data entry window functions have the option to select a callback with options "valuechangedfcn" and "valuechangingfcn". I have used the valuechangedfcn callback to do something after the GUI user changes the value in that field. But, I don't know what valuechangingfcn is used for. Is that for doing something when a user clicks within the field and has not yet finished entering the new value, and the GUI would do something during that time? What would be an example?... Maybe pause an execution that is underway?
0 个评论
采纳的回答
Kevin Holly
2022-6-7
Let's say it is a slider. "valuechangedfcn" would occur after you finished dragging the slider and let go on a new value. "valuechangingfcn" would occur while you are dragging the slider.
3 个评论
Kevin Holly
2022-6-7
If you are dragging a slider with a left mouse button. Letting go of the left mouse button would end 'ValueChangingFcn' and trigger 'ValueChangedFcn' if it lands on a new value. So, I would say letting go of the mouse button you are holding down would "END" it.
更多回答(1 个)
Matt J
2022-6-7
编辑:Matt J
2022-6-7
Is that for doing something when a user clicks within the field and has not yet finished entering the new value, and the GUI would do something during that time? What would be an example?
Suppose you wanted to implement some sort of autocomplete feature. As the user types characters into an edit-text field, its valuechangingfcn can have a different edit box display suggested completions.
另请参阅
类别
在 Help Center 和 File Exchange 中查找有关 Data Import and Export 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!