java - Detecting which way mouse is scrolled -



java - Detecting which way mouse is scrolled -

there 1 method in mousewheellistener interface. need different things depending on whether mouse scrolled or down. how accomplish such thing? information, have jpanel within jscrollpane. utilize mouse wheel motion zoom in or out.

the mousewheelmoved method takes mousewheelevent parameter. there fields in parameter can utilize determine direction of scrolling (see mousewheelevent). 1 time know direction wheel moved in, can decide action perform.

java swing event-handling mousewheel

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