Can a JFrame reappear when a certain key combination is pressed?

Question

The defaultCloseOperation() in my JFrame is set to DO_NOTHING_ON_CLOSE. The IDE shows that the program is still running and there is no way to get the JFrame back.

I want to know, how do I get the JFrame to be visible again if a certain key combination is pressed like SHIFT+V ? Like in some parental control and surveillance softwares

I know KeyListener can not be used cause it needs something focussable to which input can be sent... so what is the way around ??
Can it reappear when some keys are pressed ?

score 1 · Accepted Answer · edited May 23 '17 at 12:28

1

not directly and possible with Java, Swing GUI doesn't reacting to any Key or Mouse Events if isn't visible on the screen and hasn't Focus owner
you can use SystemTray as standard workaround, there you can from JMenuItems Action to display your container again

EDIT

notice to the 1st. point, some of Mouse Event are accesible and is possible to thare those events, valid for Win7/8 and for JButtons Components, JTableHeader..., but contianer must be visible on the screen

edited May 23 '17 at 12:28

Community

1
1

answered Mar 23 '13 at 07:37

mKorbel

109,525
20
134
319

I was making a surveillance software so I need to have that facility. What other option apart from `SystemTray` do I have ? JNA ?? – An SO User Mar 23 '13 at 07:40
yes will be possible, but is about KeyLogger, then probably can be antivirus sensitive, SystemTray is proper and direct way – mKorbel Mar 23 '13 at 07:42

score 1 · Answer 2 · answered Mar 23 '13 at 07:41

First of you make a windows adapter so that you can use the windowClosing method inside it. This method overrides the default EXIT_ON_CLOSE or in you case DO_NOTHING_ON_CLOSE and write what you want to happen when the program tries to exit on the red X. Hope it helps

Can a JFrame reappear when a certain key combination is pressed?

2 Answers2