^KeyStroke and ^DataChg: Difference between revisions
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As of [[4.30]] | As of [[4.30]], two new [[INPUT FIELDS]] field attributes are now supported which provide detailed control of user input: | ||
*^KEYSTROKE - return control to the program when a keystroke is entered | *^KEYSTROKE - return control to the program when a keystroke is entered | ||
*^DATACHG - return control to the program when data is changed | *^DATACHG - return control to the program when data is changed | ||
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*142 - ( applies only to ^KEYSTROKE ) the data is unchanged but a key was pressed or a mouse action occurred that did not trigger a field exit | *142 - ( applies only to ^KEYSTROKE ) the data is unchanged but a key was pressed or a mouse action occurred that did not trigger a field exit | ||
When a key is pressed with ^KEYSTROKE or ^DATACHG that sets a 140, 141 or 142 FKEY, it will also set the [[KStat$]] value. This allows the program to see what key was pressed. This KSTAT$ value will be cleared on the next | When a key is pressed with ^KEYSTROKE or ^DATACHG that sets a 140, 141 or 142 FKEY, it will also set the [[KStat$]] value. This allows the program to see what key was pressed. This KSTAT$ value will be cleared on the next [[RINPUT Fields]] operation. | ||
If a navigation key operates within the field and ^KEYSTROKE is specified, it triggers fkey 142. If the navigation key causes focus to leave the field, fkeys 140-142 are not generated and KSTAT is not set. | If a navigation key operates within the field and ^KEYSTROKE is specified, it triggers fkey 142. If the navigation key causes focus to leave the field, fkeys 140-142 are not generated and KSTAT is not set. | ||
; | ;Note | ||
While shift, control and alt do not change either the functionality or fkey value of navigation keys, KSTAT$ produces unique values for each of these settings. This complicates things a bit but provides more options for programmed responses to custom key combinations. | While shift, control and alt do not change either the functionality or fkey value of navigation keys, KSTAT$ produces unique values for each of these settings. This complicates things a bit but provides more options for programmed responses to custom key combinations. | ||
Latest revision as of 16:33, 19 September 2014
As of 4.30, two new INPUT FIELDS field attributes are now supported which provide detailed control of user input:
- ^KEYSTROKE - return control to the program when a keystroke is entered
- ^DATACHG - return control to the program when data is changed
(a subset of ^KEYSTROKE)
When control is returned to a program as a result of these attributes, one of three new Fkey values is applied:
- 140 - a character was appended to the data
- 141 - the data changed other than appending a character
- 142 - ( applies only to ^KEYSTROKE ) the data is unchanged but a key was pressed or a mouse action occurred that did not trigger a field exit
When a key is pressed with ^KEYSTROKE or ^DATACHG that sets a 140, 141 or 142 FKEY, it will also set the KStat$ value. This allows the program to see what key was pressed. This KSTAT$ value will be cleared on the next RINPUT Fields operation.
If a navigation key operates within the field and ^KEYSTROKE is specified, it triggers fkey 142. If the navigation key causes focus to leave the field, fkeys 140-142 are not generated and KSTAT is not set.
- Note
While shift, control and alt do not change either the functionality or fkey value of navigation keys, KSTAT$ produces unique values for each of these settings. This complicates things a bit but provides more options for programmed responses to custom key combinations.