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87 lines
2.5 KiB
Plaintext
87 lines
2.5 KiB
Plaintext
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The '''KEY LIST''' statement lists the softkey strings assigned to each of the function keys down the left side of the screen.
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{{PageSyntax}}
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:: KEY LIST
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:: KEY {ON|OFF}
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''Description:''
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* Instead of using an [[ON KEY(n)]] [[GOSUB]] statement, Function keys F1 to F12 can be assigned a "soft key" string value to return.
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* '''[[KEY n]], text$''' defines a literal or variable [[STRING]] "soft key" Function key return value.
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{{WhiteStart}} '''KEY 1, "Help"''' 'will return the string "Help" to an [[INPUT]] variable when F1 is pressed{{WhiteEnd}}
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* ''n%'' is the number 1 to 10(F1 to F10), 30 or 31(F11 or F12) of the function key to assign the soft key string.
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* [[KEY LIST]] displays each of the 12 softkey '''function key'''(F1 to F12) string values going down the screen.
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* '''KEY {ON|OFF}''' turns the softkey Function key display of F1 to F10 at the bottom of the screen ON or OFF.
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* '''Note: Soft key values cannot be assigned to KEY numbers 11 through 29 or an [[ERROR Codes|"Illegal Function call" error]] will occur!'''
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''Example 1:'' Displaying the current '''KEY LIST''' string assignments to the Function keys.
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{{CodeStart}} '' ''
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{{Cl|KEY n|KEY}} 1, "Help"
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{{Cl|KEY n|KEY}} 5, "Compile"
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{{Cl|KEY n|KEY}} 10, "Quit"
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{{Cl|PRINT}} "Press any key!"
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K$ = {{Cl|INPUT$}}(1)
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{{Cl|KEY LIST}}
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{{Cl|END}} '' ''
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{{CodeEnd}}
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{{OutputStart}}Press any key!
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F1 Help
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F2
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F3
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F4
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F5 Compile
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F6
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F7
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F8
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F9
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F10 Quit
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F11
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F12
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{{OutputEnd}}
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''Example 2:'' Displaying the function key assignments for F1 to F10 at the bottom of the screen with '''KEY ON''' and '''KEY OFF'''.
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{{CodeStart}} '' ''
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{{Cl|KEY n|KEY}} 1, "Help" + {{Cl|CHR$}}(13) 'add Return character to complete the input
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{{Cl|KEY n|KEY}} 5, "Compile" + {{Cl|CHR$}}(13)
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{{Cl|KEY n|KEY}} 10, "Quit" + {{Cl|CHR$}}(13)
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'''KEY ON'''
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DO
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{{Cl|INPUT}} "Press F10 to turn display off! ", M$
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LOOP UNTIL M$ = "Quit"
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'''KEY OFF'''
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K$ = {{Cl|INPUT$}}(1)
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{{Cl|KEY LIST}}
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{{Cl|END}} '' ''
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{{CodeEnd}}
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{{OutputStart}}Press F10 to turn display off! Help
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Press F10 to turn display off! Compile
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1 {{WBG|Help←}} 2 3 4 5 {{WBG|Compil}} 6 7 8 9 10 {{WBG|Quit←}}
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{{OutputEnd}}
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:''Explanation:'' The [[INPUT]] variable will hold the string value as if it was typed in and entered. "Quit" will KEY OFF bottom display.
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''See also:''
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* [[KEY n]], [[KEY(n)]],
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* [[ON KEY(n)]]
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* [[_KEYHIT]], [[_KEYDOWN]]
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{{PageNavigation}}
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