IT/PowerApps

PowerApps Pen Input check

Last72 2020. 9. 8. 15:34

Example case: The submit button only enables when the pen input (Signature) is filled.

 

Old way

App.OnStart

Set(initialTeamLeaderSig, penManagerERS.Image);

Pen.OnSelect

Set(TeamLeaderSig, penTeamLeaderERS.Image)

Button.DisplayMode

If(TeamLeaderSig <> initialTeamLeaderSig, DisplayMode.Edit, DisplayMode.Disabled)

Issue: when user clicks and not draw anything, the button still enabled.

 

New way

Screen.OnVisible

UpdateContext({locTeamLeaderSigBlank: JSON(PenInput1.Image, JSONFormat.IncludeBinaryData)})

Pen.OnSelect

UpdateContext({locTeamLeaderSigCurrent: JSON(Self.Image, JSONFormat.IncludeBinaryData)});

ResetBtn.OnSelect

Reset(PenInput1);

UpdateContext({locTeamLeaderSigTimerStart: false});

UpdateContext({locTeamLeaderSigTimerStart: true});

Timer.Start

locTeamLeaderSigTimerStart

Timer.Visible

false

Timer.OnTimerEnd

UpdateContext({locTeamLeaderSigCurrent: JSON(PenInput1.Image, JSONFormat.IncludeBinaryData)});

Timer.Duration

50

SubmitBtn.DisplayMode

locTeamLeaderSigBlank<>locTeamLeaderSigCurrent

 

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