qr code generator java 1.4 Let s look at the different methods that can be used to achieve this. in Java

Printer QR Code 2d barcode in Java Let s look at the different methods that can be used to achieve this.

Let s look at the different methods that can be used to achieve this.
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REMOVING OR RENAMING FIELDS
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There are three different methods that allow you to remove a field:
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removeFieldFromPage(int page) Removes all field widgets from a page. Fields are removed if they have no other widgets on at least one other page. removeField(String name, int page) Removes the widgets from the field with name name from page page. The field isn t removed entirely if it has widgets on another page. removeField(String name) Removes the entire field and all its widgets.
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In this example, it s better to remove the password field instead of flattening it because it doesn t make sense to print a series of stars where the password field used to be. You don t want to remove the field named "personal.reason", you only want to reuse it. In section 6.4.3, you used renameField() before concatenating forms, and you can also use this method to change "reason" into "motivation", but there are some caveats:
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You can only use this method for fields that don t have named children. The following line won t work:
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form.renameField("personal", "sender");
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If you rename a field, you can only change the partial name; the first part of the fully qualified name has to be identical. This line won t work either:
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form.renameField("personal.reason", "motivation");
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Filling out interactive forms
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There are two ways to make a field read-only. Which is the better way to do it depends on your requirements.
MAKING A FIELD READ-ONLY
In figure 8.7, you made the login name read-only with the setFieldProperty() method. You set the flag TextField.READ_ONLY, and as a result the end user can no longer change the login name in the form. The field isn t flattened: you can still ask the form for the content of this field. The following line will return "blowagie" when used on the form shown in figure 8.7:
System.out.println(form.getField("personal.loginname"));
Note that it s possible to remove the read-only flag with iText, Acrobat, or another tool. You can even remove it using a JavaScript action executed in the PDF viewer. If you want the field to be removed, but you want to keep the content, you can use setFormFlattening() but restrict the flattening process to a limited number of fields. Only those fields will be flattened for which partialFormFlattening() was used. Flattening will remove the field structure, so the following line will return null when used on the form shown in figure 8.7:
System.out.println(form.getField("personal.name"));
Suppose that the way iText flattens PDF forms doesn t meet your needs, in spite of the tips and tricks we ve looked at so far. You can work around this by taking control over the flattening process.
Customized form flattening
I was once asked to work on a project that involved ads for used cars that had to appear in newspapers and magazines. The design of the advertisement was always the same: it contained the logo and the address of the company that sold used cars, but the main part of the ad consisted of photos, descriptions, and the prices of cars that were on sale that week. That content changed every week, because cars were constantly being bought and sold.
CREATING AN ADVERTISEMENT
I ve made a simplified version of that assignment using the movie database for the Foobar Film Festival. See figure 8.8. Two forms are involved in this example. Take a look at figure 8.9. The form in the back was created using Open Office. The form consists of a nice background and a number of rectangular fields. The second form is the PDF shown in the foreground of figure 8.9. It s a rectangle with three fields. The upper field is used for an image: a picture of a used car in the real-world example, a movie poster in our example. The middle field is used for text: a description of the car or information about the film. The lower field could be filled with the car price or the production year.
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