Re: [iText-questions] Emptying a signature field
Paulo, No rush, but did you have a chance to look at my digital signature clearing issue this weekend? Thanks! -- View this message in context: http://itext-general.2136553.n4.nabble.com/About-this-mailing-list-tp2968159p2989644.html Sent from the iText - General mailing list archive at Nabble.com. -- Beautiful is writing same markup. Internet Explorer 9 supports standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 L3. Spend less time writing and rewriting code and more time creating great experiences on the web. Be a part of the beta today. http://p.sf.net/sfu/beautyoftheweb ___ iText-questions mailing list iText-questions@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/itext-questions Many questions posted to this list can (and will) be answered with a reference to the iText book: http://www.itextpdf.com/book/ Please check the keywords list before you ask for examples: http://itextpdf.com/themes/keywords.php
[iText-questions] Emptying a signature field
On 8/10/2010 14:43, djdjdj wrote: For me, there is a bit of a disconnect to that logic. For example, if I'm creating a web form and want to clear the value of a field in a web form I certainly wouldn't delete the field and recreate it but would instead set the value to an empty string. That is: if you're talking about a Text field. What you say isn't true for a Button field. Suppose you want to replace the icon on a button field, than you have to getNewPushbuttonFromField() and replacePushbuttonField() as is done in this example: http://itextpdf.com/examples/iia.php?id=156 Why do you need to copy the field, throw away the original field and then add the copied field? Because there's more to a button than just a /V value. As replacing a button is a more common request than replacing a signature field, convenience methods were added to iText. There are no such convenience methods (yet) to empty a signature field. Similarly, if I'm clearing a value of a form field in a pdf why would it make sense to delete the whole field instead of simply clearing the field's value? I should check ISO-32000 to see what keys are important in the signature dictionary. Did you look inside the PDF? Aren't there any other keys (other than /V and /AP) left in the signature dictionary? And also: if you remove the /AP value, you throw away the visual appearance of the signature, won't that be a problem? -- Beautiful is writing same markup. Internet Explorer 9 supports standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 L3. Spend less time writing and rewriting code and more time creating great experiences on the web. Be a part of the beta today. http://p.sf.net/sfu/beautyoftheweb ___ iText-questions mailing list iText-questions@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/itext-questions Many questions posted to this list can (and will) be answered with a reference to the iText book: http://www.itextpdf.com/book/ Please check the keywords list before you ask for examples: http://itextpdf.com/themes/keywords.php
Re: [iText-questions] Emptying a signature field
Bruno Lowagie (iText) wrote: That is: if you're talking about a Text field. What you say isn't true for a Button field. Suppose you want to replace the icon on a button field, than you have to getNewPushbuttonFromField() and replacePushbuttonField() as is done in this example: http://itextpdf.com/examples/iia.php?id=156 Why do you need to copy the field, throw away the original field and then add the copied field? Because there's more to a button than just a /V value. I see what you mean there. That makes sense. Bruno Lowagie (iText) wrote: As replacing a button is a more common request than replacing a signature field, convenience methods were added to iText. There are no such convenience methods (yet) to empty a signature field. Makes sense. I would think that clearing a digital signature field would be more of a common request than replacing a button though. That's just me I guess... Bruno Lowagie (iText) wrote: I should check ISO-32000 to see what keys are important in the signature dictionary. Did you look inside the PDF? Aren't there any other keys (other than /V and /AP) left in the signature dictionary? And also: if you remove the /AP value, you throw away the visual appearance of the signature, won't that be a problem? There are other keys in the signature dictionary. For example in the values section the keys are: /AP /P /FT /MK /F /T /Subtype /V /Type /Rect I would think it would be a problem, but again as I stated in the other thread, that's the only code I've found that has anything to do with what I'm trying to accomplish. I think it was Paulo who actually suggested deleting the /V and /AP values from the field in the thread I reference before. -- View this message in context: http://itext-general.2136553.n4.nabble.com/About-this-mailing-list-tp2968159p2968303.html Sent from the iText - General mailing list archive at Nabble.com. -- Beautiful is writing same markup. Internet Explorer 9 supports standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 L3. Spend less time writing and rewriting code and more time creating great experiences on the web. Be a part of the beta today. http://p.sf.net/sfu/beautyoftheweb ___ iText-questions mailing list iText-questions@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/itext-questions Many questions posted to this list can (and will) be answered with a reference to the iText book: http://www.itextpdf.com/book/ Please check the keywords list before you ask for examples: http://itextpdf.com/themes/keywords.php
Re: [iText-questions] Emptying a signature field
It's funny that I thought that I had provided a method in AcroFields to empty a signature field but it looks like I didn't. I'll add it this weekend. Paulo -Original Message- From: djdjdj [mailto:d...@donaldlaing.com] Sent: Friday, October 08, 2010 2:20 PM To: itext-questions@lists.sourceforge.net Subject: Re: [iText-questions] Emptying a signature field Bruno Lowagie (iText) wrote: That is: if you're talking about a Text field. What you say isn't true for a Button field. Suppose you want to replace the icon on a button field, than you have to getNewPushbuttonFromField() and replacePushbuttonField() as is done in this example: http://itextpdf.com/examples/iia.php?id=156 Why do you need to copy the field, throw away the original field and then add the copied field? Because there's more to a button than just a /V value. I see what you mean there. That makes sense. Bruno Lowagie (iText) wrote: As replacing a button is a more common request than replacing a signature field, convenience methods were added to iText. There are no such convenience methods (yet) to empty a signature field. Makes sense. I would think that clearing a digital signature field would be more of a common request than replacing a button though. That's just me I guess... Bruno Lowagie (iText) wrote: I should check ISO-32000 to see what keys are important in the signature dictionary. Did you look inside the PDF? Aren't there any other keys (other than /V and /AP) left in the signature dictionary? And also: if you remove the /AP value, you throw away the visual appearance of the signature, won't that be a problem? There are other keys in the signature dictionary. For example in the values section the keys are: /AP /P /FT /MK /F /T /Subtype /V /Type /Rect I would think it would be a problem, but again as I stated in the other thread, that's the only code I've found that has anything to do with what I'm trying to accomplish. I think it was Paulo who actually suggested deleting the /V and /AP values from the field in the thread I reference before. -- View this message in context: http://itext-general.2136553.n4.nabble.com/About-this-mailing-list-tp2968159p2968303.html Sent from the iText - General mailing list archive at Nabble.com. -- Beautiful is writing same markup. Internet Explorer 9 supports standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 L3. Spend less time writing and rewriting code and more time creating great experiences on the web. Be a part of the beta today. http://p.sf.net/sfu/beautyoftheweb ___ iText-questions mailing list iText-questions@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/itext-questions Many questions posted to this list can (and will) be answered with a reference to the iText book: http://www.itextpdf.com/book/ Please check the keywords list before you ask for examples: http://itextpdf.com/themes/keywords.php Aviso Legal: Esta mensagem é destinada exclusivamente ao destinatário. Pode conter informação confidencial ou legalmente protegida. A incorrecta transmissão desta mensagem não significa a perca de confidencialidade. Se esta mensagem for recebida por engano, por favor envie-a de volta para o remetente e apague-a do seu sistema de imediato. É proibido a qualquer pessoa que não o destinatário de usar, revelar ou distribuir qualquer parte desta mensagem. Disclaimer: This message is destined exclusively to the intended receiver. It may contain confidential or legally protected information. The incorrect transmission of this message does not mean the loss of its confidentiality. If this message is received by mistake, please send it back to the sender and delete it from your system immediately. It is forbidden to any person who is not the intended receiver to use, distribute or copy any part of this message. -- Beautiful is writing same markup. Internet Explorer 9 supports standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 L3. Spend less time writing and rewriting code and more time creating great experiences on the web. Be a part of the beta today. http://p.sf.net/sfu/beautyoftheweb___ iText-questions mailing list iText-questions@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/itext-questions Many questions posted to this list can (and will) be answered with a reference to the iText book: http://www.itextpdf.com/book/ Please check the keywords list before you ask for examples: http://itextpdf.com/themes/keywords.php
Re: [iText-questions] Emptying a signature field
Wow Paulo, that's great! Just for my own information though, what keys should I be paying attention to in order to do a clear of a signature field? The /V and /AP still or would all the keys need to be cleaned? -- View this message in context: http://itext-general.2136553.n4.nabble.com/About-this-mailing-list-tp2968159p2968382.html Sent from the iText - General mailing list archive at Nabble.com. -- Beautiful is writing same markup. Internet Explorer 9 supports standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 L3. Spend less time writing and rewriting code and more time creating great experiences on the web. Be a part of the beta today. http://p.sf.net/sfu/beautyoftheweb ___ iText-questions mailing list iText-questions@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/itext-questions Many questions posted to this list can (and will) be answered with a reference to the iText book: http://www.itextpdf.com/book/ Please check the keywords list before you ask for examples: http://itextpdf.com/themes/keywords.php
Re: [iText-questions] Emptying a signature field
Those keys will have to be removed and some others will have to be modified. For example, it's customary to lock the field when signing but a locked empty field has not much use if trying to sign with Acrobat. Paulo -Original Message- From: djdjdj [mailto:d...@donaldlaing.com] Sent: Friday, October 08, 2010 3:05 PM To: itext-questions@lists.sourceforge.net Subject: Re: [iText-questions] Emptying a signature field Wow Paulo, that's great! Just for my own information though, what keys should I be paying attention to in order to do a clear of a signature field? The /V and /AP still or would all the keys need to be cleaned? -- View this message in context: http://itext-general.2136553.n4.nabble.com/About-this-mailing-list-tp2968159p2968382.html Sent from the iText - General mailing list archive at Nabble.com. -- Beautiful is writing same markup. Internet Explorer 9 supports standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 L3. Spend less time writing and rewriting code and more time creating great experiences on the web. Be a part of the beta today. http://p.sf.net/sfu/beautyoftheweb ___ iText-questions mailing list iText-questions@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/itext-questions Many questions posted to this list can (and will) be answered with a reference to the iText book: http://www.itextpdf.com/book/ Please check the keywords list before you ask for examples: http://itextpdf.com/themes/keywords.php Aviso Legal: Esta mensagem é destinada exclusivamente ao destinatário. Pode conter informação confidencial ou legalmente protegida. A incorrecta transmissão desta mensagem não significa a perca de confidencialidade. Se esta mensagem for recebida por engano, por favor envie-a de volta para o remetente e apague-a do seu sistema de imediato. É proibido a qualquer pessoa que não o destinatário de usar, revelar ou distribuir qualquer parte desta mensagem. Disclaimer: This message is destined exclusively to the intended receiver. It may contain confidential or legally protected information. The incorrect transmission of this message does not mean the loss of its confidentiality. If this message is received by mistake, please send it back to the sender and delete it from your system immediately. It is forbidden to any person who is not the intended receiver to use, distribute or copy any part of this message. -- Beautiful is writing same markup. Internet Explorer 9 supports standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 L3. Spend less time writing and rewriting code and more time creating great experiences on the web. Be a part of the beta today. http://p.sf.net/sfu/beautyoftheweb___ iText-questions mailing list iText-questions@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/itext-questions Many questions posted to this list can (and will) be answered with a reference to the iText book: http://www.itextpdf.com/book/ Please check the keywords list before you ask for examples: http://itextpdf.com/themes/keywords.php
