I am trying following code where user enters 2 numbers and on clicking calculate button, answer should be shown. There are also buttons for clearing fields and for exiting.
REBOL[]
fields: [f-ht f-wt ans]
reset-fields: does [
unfocus
f-ht/text: " " ; Changing this to "ENTER NUMBER HERE" does not help
f-wt/text: " "
focus f-ht
]
oncalc: does [
ans/text: (to integer! f-wt/text) / ((100 * to integer! f-ht/text) * (100 * to integer! f-ht/text))
show fields
]
lo: layout [
style tx label 200x24 center
style fld field 200x24 center
style btn button 200x24 center
tx "First Number:"
f-ht: fld
tx "Second Number:"
f-wt: fld
btn "Calculate" [oncalc]
ans: tx "Answer"
btn "Clear" [reset-fields show fields] ; NOT WORKING- NOTHING HAPPENS
btn "Exit" escape [unview/only lo]
]
reset-fields
view center-face lo
The GUI is showing all right. However, there are following problems:
On clear button clicking, nothing is happening.
There are no changes on GUI and no errors are being reported. Where is the problem and how can this be solved? Thanks for your help.
Clear the fields instead of setting to new strings
reset-fields: does [
unfocus
clear f-ht/text
clear f-wt/text
focus f-ht
]