interactive/form_and_layers
Define two layers for English or German contents and hide or show them via form field buttons. Define two layers for displaying some text and a "combobox" form field together with its list items in English or German. Create the two form field buttons "English" and "Deutsch" which show the English or the German layer when the user presses the respective button.
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* Forms and Layers:
* Define two layers for English or German contents and hide or show
* them via form field buttons
*
* Define two layers for displaying some text and a "combobox" form field
* together with its list items in English or German. Create the two form field
* buttons "English" and "Deutsch" which show the English or the German layer
* when the user presses the respective button.
*
* Required software: PDFlib/PDFlib+PDI/PPS 7
* Required data: none
*/
package com.pdflib.cookbook.pdflib.interactive;
import com.pdflib.pdflib;
import com.pdflib.PDFlibException;
public class form_and_layers
{
public static void main (String argv[])
{
/* This is where the data files are. Adjust as necessary. */
String searchpath = "../input";
String outfile = "form_and_layers.pdf";
String title = "Form and Layers";
pdflib p = null;
String optlist;
int font, en_act, de_act, layerEN, layerDE;
double width=100, height=18, llx = 100, lly = 600;
try {
p = new pdflib();
p.set_parameter("SearchPath", searchpath);
/* This means we must check return values of load_font() etc. */
p.set_parameter("errorpolicy", "return");
/* Open the document with the "Layers" navigation tab visible */
if (p.begin_document(outfile, "openmode=layers") == -1)
throw new Exception("Error: " + p.get_errmsg());
p.set_info("Creator", "PDFlib Cookbook");
p.set_info("Title", title + " $Revision: 1.4 $");
/* Load the font */
font = p.load_font("Helvetica", "winansi", "");
if (font == -1) {
throw new Exception("Error: " + p.get_errmsg());
}
/* Start page */
p.begin_page_ext(0, 0, "width=a4.width height=a4.height");
/* ------------------------------------------------------------------
* Define the layer "English" and place some English text as well as
* a form field of type "combobox" with some English list items on it
* ------------------------------------------------------------------
*/
layerEN = p.define_layer("English", "");
p.begin_layer(layerEN);
/* Output an English combobox title */
p.setfont(font, 12);
p.fit_textline("Choose a color from the list or enter an individual " +
"color:", llx, lly, "");
lly-=30;
/* Create the "color" form field of type "combobox" with some English
* list items and a height similar to the height of one list item
*/
optlist = "font=" + font + " fontsize=14 backgroundcolor={gray 0.9} " +
"bordercolor={gray 0.7} itemnamelist={0 1 2 3 4} currentvalue=4 " +
"itemtextlist={yellow green blue red white} editable=true layer=" +
layerEN;
p.create_field(llx, lly, llx + width, lly + height, "color", "combobox",
optlist);
/* -----------------------------------------------------------------
* Define the layer "German" and place some German text as well as
* a form field of type "combobox" with some German list items on it
* -----------------------------------------------------------------
*/
layerDE = p.define_layer("German", "initialviewstate=false " +
"initialprintstate=false");
p.begin_layer(layerDE);
lly=600;
p.fit_textline("Wählen Sie eine Farbe aus der Liste oder geben Sie " +
"eine eigene Farbe ein:", llx, lly, "");
lly-=30;
/* Create the "farbe" form field of type "combobox" with some German
* list items and a height similar to the height of one list item
*/
optlist = "font=" + font + " fontsize=14 backgroundcolor={gray 0.9} " +
"bordercolor={gray 0.7} itemnamelist={0 1 2 3 4} currentvalue=4 " +
"itemtextlist={gelb grün blau rot weiß} editable=true layer=" +
layerDE;
p.create_field(llx, lly, llx + width, lly + height, "farbe", "combobox",
optlist);
/* At most one of the "English" and "German" layers should be visible */
p.set_layer_dependency("Radiobtn", "group={" + layerEN + " " +
layerDE + "}");
/* Create a "SetOCGState" action which shows the English layer. Since
* at most one layer may be visible we don't need to explicitly hide
* the German layer.
*/
en_act = p.create_action("SetOCGState", "layerstate={on " +
layerEN + "}");
/* Create a "SetOCGState" action which shows the German layer. Since
* at most one layer may be visible we don't need to explicitly hide
* the English layer. */
de_act = p.create_action("SetOCGState", "layerstate={on " +
layerDE + "}");
/* Create the "english" and "german" form fields of type "pushbutton".
* Using the action defined above switch to the other layer when the
* user releases the mouse button inside the field's area
* (action={up <actionhandle>}).
*/
lly = 680;
optlist =
"bordercolor={rgb 0.25 0 0.95} backgroundcolor={rgb 0.95 0.95 1} " +
"fillcolor={rgb 0.25 0 0.95} font=" + font + " fontsize=14";
p.create_field(llx, lly, llx + width, lly + height, "english",
"pushbutton", optlist + " caption={English} action={up " +
en_act + "}");
llx+=150;
p.create_field(llx, lly, llx + width, lly + height, "german",
"pushbutton", optlist + " caption={Deutsch} action={up " +
de_act + "}");
/* Complete all layers */
p.end_layer();
p.end_page_ext("");
p.end_document("");
} catch (PDFlibException e) {
System.err.print("PDFlib exception occurred:\n");
System.err.print("[" + e.get_errnum() + "] " + e.get_apiname() +
": " + e.get_errmsg() + "\n");
} catch (Exception e) {
System.err.println(e.getMessage());
} finally {
if (p != null) {
p.delete();
}
}
}
}