Java Key Bindings using Groovy Swing Builder - swing

Question

I am trying to write in Groovy application, using "Calculator like" keys functionality. So I would like swing action to be invoked, when I:
press JButton
press corresponding keyboard key, no matther whether there is focus on JButton or not.
Probably the best solution is to use Java Key Bindings, as described here:
https://docs.oracle.com/javase/tutorial/uiswing/misc/keybinding.html
Following combination of Groovy and Java seems to work well:
package packageSwingTest4
import groovy.swing.SwingBuilder
import javax.swing.*
import java.awt.*
import javax.swing.WindowConstants as WC
class SwingTest4 {
def static b
static void main(args) {
def swing = new SwingBuilder()
def f2Action = swing.action(name:"F2", shortDescription:"F2 button", accelerator:"F2") {
println "F2 pressed"
}
swing.edt {
def f=frame(title: 'Keborad Binding test', size:[400,300],defaultCloseOperation: JFrame.EXIT_ON_CLOSE, show: true) {
panel {
b = button(text: 'F2', actionPerformed:{println "FFFF2222 pressed"})
b.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(KeyStroke.getKeyStroke("F2"),"F2 pressed")
b.getActionMap().put("F2 pressed",f2Action)
}
}
}
}
}
But I do not like to combine Groovy/Java in this way, namely as I will:
- loose nice structure of Groovy code related to structure of GUI
- I have to define Actions separately and not "nicely" as in case of Groovy swing builder
Do you know about "cleaner" solution of my problem using pure Groovy/ SwingBuilder? I would prefer to use Key Bindings, not Key Listener..
Thank you for help and recommendations

Answer 1

Not 100% sure, but do you mean like this:
import groovy.swing.*
import javax.swing.*
def swing = new SwingBuilder()
def f2Action = swing.action(name:"F2 text", shortDescription:"F2 button", keyStroke:"F2") {
println "F2 pressed"
}
swing.edt {
frame(title: 'Keborad Binding test', size:[400,300],defaultCloseOperation: JFrame.HIDE_ON_CLOSE, show: true) {
panel {
button(text: 'F2',
actionPerformed:{ println "FFFF2222 pressed" }) {
action(f2Action)
}
}
}
}

Answer 2

def swing = new SwingBuilder()
def f2Action = swing.action(name:"F2 text", shortDescription:"F2 button", focus: JComponent.WHEN_IN_FOCUSED_WINDOW, keyStroke:"F2") {
println "F2 pressed"
}
def f3Action = swing.action(name:"F3 text", shortDescription:"F2 button", keyStroke:"F3") {
println "F3 pressed"
}
swing.edt {
frame(title: 'Keborad Binding test', size:[400,300],defaultCloseOperation: JFrame.HIDE_ON_CLOSE, show: true) {
panel {
button('F2') {action(f2Action)}
button('F3') {action(f3Action)}
}
}
}