Dialog/Form Validation - Revision history

Thomas Linder Puls: source files

2016-03-04T09:55:34Z

source files

← Older revision		Revision as of 11:55, 4 March 2016
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	In this tutorial, we will show you how to validate controls in a dialog or in a form. First we will describe the validation concept. We will show how integerControl and realControl use the validation concept. Then we consider the validation in a container control. And finally we will add the validation for several usual controls: editControl, listBox and a newly created custom control.		In this tutorial, we will show you how to validate controls in a dialog or in a form. First we will describe the validation concept. We will show how integerControl and realControl use the validation concept. Then we consider the validation in a container control. And finally we will add the validation for several usual controls: editControl, listBox and a newly created custom control.

	~~'''Download''' source~~ files ~~of the example project used in~~ this tutorial:		Source files corresponding to this tutorial is available in the examples '''Help -> Install Examples...'''

	* Visual Prolog 7.4 and 7.3 install examples in the ~~IDE:~~
	*:'''Help -> Install Examples...'''
	* [http://download.pdc.dk/vip/72/tutorial_examples/validation.zip Visual Prolog 7.2 version].
	* [http://download.pdc.dk/vip/71/examples/tutorial_examples/validation.zip Visual Prolog 7.1 version].


	==Validation Concept==		==Validation Concept==

Thomas Linder Puls: category

2016-03-04T09:52:47Z

Thomas Linder Puls: 7.4

2012-12-02T22:38:27Z

7.4

← Older revision		Revision as of 00:38, 3 December 2012
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	'''Download''' source files of the example project used in this tutorial:		'''Download''' source files of the example project used in this tutorial:

	[http://download.pdc.dk/vip/72/tutorial_examples/validation.zip Visual Prolog 7.2 version].		* Visual Prolog 7.4 and 7.3 install examples in the IDE:
			*:'''Help -> Install Examples...'''
	[http://download.pdc.dk/vip/71/examples/tutorial_examples/validation.zip Visual Prolog 7.1 version].		* [http://download.pdc.dk/vip/72/tutorial_examples/validation.zip Visual Prolog 7.2 version].
			* [http://download.pdc.dk/vip/71/examples/tutorial_examples/validation.zip Visual Prolog 7.1 version].

Thomas Linder Puls: Validation in Usual Controls

2012-07-04T20:13:15Z

Validation in Usual Controls

← Older revision		Revision as of 22:13, 4 July 2012
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	==Validation in Usual Controls==		==Validation in Usual Controls==

	Let us create a new control myControl~~''''~~ in our project, and then create a form and add three controls in it:		Let us create a new control <vp>myControl</vp> in our project, and then create a form and add three controls in it:

	*edit control;		*edit control;
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	*listbox control;		*listbox control;

	*custom control of myControl~~''''~~ class.		*custom control of <vp>myControl</vp> class.

	You can see the result in the supplied example project in the form ''usualControls''.		You can see the result in the supplied example project in the form ''usualControls''.

Thomas Linder Puls: Validation in Container Controls

2012-07-04T20:12:00Z

Validation in Container Controls

← Older revision		Revision as of 22:12, 4 July 2012
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	==Validation in Container Controls==		==Validation in Container Controls==

	For considering the validation in a container control, we should create such control first. Let us create a new control ''fromTo'' in our project and add two controls integerControl in it.		For considering the validation in a container control, we should create such control first. Let us create a new control <vp>fromTo</vp> in our project and add two controls integerControl in it.

	We will consider that ''fromTo'' control is valid if From value is less than To value, therefore we will add ~~the~~ validation responder to fromTo~~''''~~ control:		We will consider that <vp>fromTo</vp> control is valid if <vp>From</vp> value is less than <vp>To</vp> value, therefore we will add a validation responder to <vp>fromTo</vp> control:

	<vip>predicates		<vip>predicates
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	validateFromTo (_) = control::contentsOk.</vip>		validateFromTo (_) = control::contentsOk.</vip>

	Please notice that control from_ctl~~''''~~ will receive the focus if the validation is not successful.		Please notice that control <vp>from_ctl</vp> will receive the focus if the validation is not successful.

	==Validation in Usual Controls==		==Validation in Usual Controls==

Thomas Linder Puls: Validation in Container Controls

2012-07-04T20:09:03Z

Validation in Container Controls

← Older revision		Revision as of 22:09, 4 July 2012
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	validateFromTo : control::validateResponder.		validateFromTo : control::validateResponder.
	clauses		clauses
	~~onIntValidate~~(Source) = control::contentsInvalid(Source,from_ctl,		validateFromTo (Source) = control::contentsInvalid(Source,from_ctl,
	"From value must be less than To value") :-		"From value must be less than To value") :-
	from_ctl:getInteger() >= to_ctl:getInteger(),		from_ctl:getInteger() >= to_ctl:getInteger(),
	!.		!.
	~~onIntValidate~~(_) = control::contentsOk.</vip>		validateFromTo (_) = control::contentsOk.</vip>

	Please notice that control from_ctl'''' will receive the focus if the validation is not successful.		Please notice that control from_ctl'''' will receive the focus if the validation is not successful.

Thomas Linder Puls: /* Validation in integerControl and realControl */ fomratting

2009-03-09T12:43:36Z

Validation in integerControl and realControl: fomratting

← Older revision		Revision as of 14:43, 9 March 2009
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	==Validation in integerControl and realControl==		==Validation in integerControl and realControl==

	Let us create a form and add two '''custom controls''' in it with the classes integerControl and realControl. You can see the result in the supplied example project in the form integerControlAndRealControl.		Let us create a form and add two '''custom controls''' in it with the classes integerControl and realControl. You can see the result in the supplied example project in the form <vp>integerControlAndRealControl</vp>.

	The generated code will look like:		The generated code will look like:
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	realControl_ctl:setSize(60,12),</vip>		realControl_ctl:setSize(60,12),</vip>

	Also we need to add invocation of integerControlAndRealControl~~''''~~ form:		Also we need to add invocation of <vp>integerControlAndRealControl</vp> form:

	<vip>predicates		<vip>predicates
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	When we run the project and input non-integral values, we will see a dialog box with an explanation about the mistake.		When we run the project and input non-integral values, we will see a dialog box with an explanation about the mistake.

	We can add also ''onOK'' responder to retrieve values of the validated controls:		We can add also <vp>onOK</vp> responder to retrieve values of the validated controls:

	<vip>predicates		<vip>predicates
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	stdIO::write("Real value = ",Real, "\n").</vip>		stdIO::write("Real value = ",Real, "\n").</vip>

	It is important to notice ''onOK'' responder is '''not''' invoked if the dialog validation is not successful. And of course, ''onOK'' responder is invoked '''after''' all validation predicates.		It is important to notice <vp>onOK</vp> responder is '''not''' invoked if the dialog validation is not successful. And of course, <vp>onOK</vp> responder is invoked '''after''' all validation predicates.

	Let us look in file \pfc\gui\controls\integerControl.pro to inspect how the validation is implemented. We can see:		Let us look in file '''\pfc\gui\controls\integerControl.pro''' to inspect how the validation is implemented. We can see:

	<vip>clauses		<vip>clauses
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	onIntValidate(_) = contentsOk.</vip>		onIntValidate(_) = contentsOk.</vip>

	I.e. if the local predicate checkContent considers the text as an integer, then the validation is successful.		I.e. if the local predicate checkContent considers the text as an <vp>integer</vp>, then the validation is successful.

	As it is mentioned above we can also force validation programmatically. We will add button TryValidation and code:		As it is mentioned above we can also force validation programmatically. We will add button TryValidation and code:

Elizabeth Safro: example links

2008-11-13T16:24:35Z

example links

← Older revision		Revision as of 18:24, 13 November 2008
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	In this tutorial, we will show you how to validate controls in a dialog or in a form. First we will describe the validation concept. We will show how integerControl and realControl use the validation concept. Then we consider the validation in a container control. And finally we will add the validation for several usual controls: editControl, listBox and a newly created custom control.		In this tutorial, we will show you how to validate controls in a dialog or in a form. First we will describe the validation concept. We will show how integerControl and realControl use the validation concept. Then we consider the validation in a container control. And finally we will add the validation for several usual controls: editControl, listBox and a newly created custom control.

	'''Download:''' [http://download.pdc.dk/vip/71/examples/tutorial_examples/validation.zip ~~source files~~] ~~of the example project used in this tutorial~~.		'''Download''' source files of the example project used in this tutorial:

			[http://download.pdc.dk/vip/72/tutorial_examples/validation.zip Visual Prolog 7.2 version].

			[http://download.pdc.dk/vip/71/examples/tutorial_examples/validation.zip Visual Prolog 7.1 version].


	==Validation Concept==		==Validation Concept==

Elizabeth Safro at 12:17, 11 September 2008

2008-09-11T12:17:44Z

← Older revision		Revision as of 14:17, 11 September 2008
Line 3:		Line 3:
	In this tutorial, we will show you how to validate controls in a dialog or in a form. First we will describe the validation concept. We will show how integerControl and realControl use the validation concept. Then we consider the validation in a container control. And finally we will add the validation for several usual controls: editControl, listBox and a newly created custom control.		In this tutorial, we will show you how to validate controls in a dialog or in a form. First we will describe the validation concept. We will show how integerControl and realControl use the validation concept. Then we consider the validation in a container control. And finally we will add the validation for several usual controls: editControl, listBox and a newly created custom control.

	'''Download: ''~~Source~~ files~~'''''~~ of the example project used in this tutorial.		'''Download:''' [http://download.pdc.dk/vip/71/examples/tutorial_examples/validation.zip source files] of the example project used in this tutorial.

	==Validation Concept==		==Validation Concept==

Thomas Linder Puls: categorized

2008-01-19T21:55:29Z

categorized

← Older revision		Revision as of 23:55, 19 January 2008
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	[[Category:Tutorials]]		[[Category:Tutorials]]
			[[Category:GUI]]

← Older revision		Revision as of 11:52, 4 March 2016
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	That is, you can see that it is possible to validate a control in really different ways.		That is, you can see that it is possible to validate a control in really different ways.

	~~==References==~~

	~~[[Category:Tutorials]]~~
	[[Category:GUI]]		[[Category:GUI]]