Java Tutorial/PDF/Layer
Содержание
Create PdfLayer
<source lang="java">
import java.io.FileOutputStream; import com.lowagie.text.Document; import com.lowagie.text.Element; import com.lowagie.text.Phrase; import com.lowagie.text.pdf.ColumnText; import com.lowagie.text.pdf.PdfContentByte; import com.lowagie.text.pdf.PdfLayer; import com.lowagie.text.pdf.PdfLayerMembership; import com.lowagie.text.pdf.PdfWriter; public class MainClass {
public static void main(String[] args) throws Exception {
Document document = new Document();
PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("2.pdf"));
writer.setPdfVersion(PdfWriter.VERSION_1_5);
document.open();
PdfContentByte cb = writer.getDirectContent();
PdfLayer layer1 = new PdfLayer("layer 1", writer);
PdfLayer layer2 = new PdfLayer("layer 2", writer);
PdfLayer layer3 = new PdfLayer("layer 3", writer);
PdfLayerMembership cat = new PdfLayerMembership(writer);
cat.addMember(layer2);
cat.addMember(layer3);
PdfLayerMembership no_cat = new PdfLayerMembership(writer);
no_cat.addMember(layer2);
no_cat.addMember(layer3);
no_cat.setVisibilityPolicy(PdfLayerMembership.ALLOFF);
cb.beginLayer(layer1);
ColumnText.showTextAligned(cb, Element.ALIGN_LEFT, new Phrase("A"), 50, 775, 0);
cb.endLayer();
cb.beginLayer(layer2);
ColumnText.showTextAligned(cb, Element.ALIGN_LEFT, new Phrase("B"), 50, 750, 0);
cb.endLayer();
cb.beginLayer(layer3);
ColumnText.showTextAligned(cb, Element.ALIGN_LEFT, new Phrase("C"), 50, 725, 0);
cb.endLayer();
cb.beginLayer(cat);
ColumnText.showTextAligned(cb, Element.ALIGN_LEFT, new Phrase("D"), 50, 700, 0);
cb.endLayer();
cb.beginLayer(no_cat);
ColumnText.showTextAligned(cb, Element.ALIGN_LEFT, new Phrase("E"), 50, 700, 0);
cb.endLayer();
document.close();
}
}</source>
Grouped layers
<source lang="java">
import java.io.FileOutputStream; import java.util.ArrayList; import com.lowagie.text.Document; import com.lowagie.text.Element; import com.lowagie.text.Phrase; import com.lowagie.text.pdf.ColumnText; import com.lowagie.text.pdf.PdfContentByte; import com.lowagie.text.pdf.PdfLayer; import com.lowagie.text.pdf.PdfWriter; public class MainClass {
public static void main(String[] args) throws Exception {
Document document = new Document();
PdfWriter writer = PdfWriter
.getInstance(document, new FileOutputStream("2.pdf"));
writer.setPdfVersion(PdfWriter.VERSION_1_5);
document.open();
PdfContentByte cb = writer.getDirectContent();
PdfLayer group = PdfLayer.createTitle("Grouped layers", writer);
PdfLayer layer1 = new PdfLayer("Group: layer 1", writer);
PdfLayer layer2 = new PdfLayer("Group: layer 2", writer);
group.addChild(layer1);
group.addChild(layer2);
cb.beginLayer(layer1);
ColumnText.showTextAligned(cb, Element.ALIGN_LEFT, new Phrase("layer 1 in the group"), 50, 700,
0);
cb.endLayer();
cb.beginLayer(layer2);
ColumnText.showTextAligned(cb, Element.ALIGN_LEFT, new Phrase("layer 2 in the group"), 50, 675,
0);
cb.endLayer();
document.close();
}
}</source>
Nested Layers
<source lang="java">
import java.io.FileOutputStream; import java.util.ArrayList; import com.lowagie.text.Document; import com.lowagie.text.Element; import com.lowagie.text.Phrase; import com.lowagie.text.pdf.ColumnText; import com.lowagie.text.pdf.PdfContentByte; import com.lowagie.text.pdf.PdfLayer; import com.lowagie.text.pdf.PdfWriter; public class MainClass {
public static void main(String[] args) throws Exception {
Document document = new Document();
PdfWriter writer = PdfWriter
.getInstance(document, new FileOutputStream("2.pdf"));
writer.setPdfVersion(PdfWriter.VERSION_1_5);
document.open();
PdfContentByte cb = writer.getDirectContent();
PdfLayer nested = new PdfLayer("Nested Layers", writer);
PdfLayer nested_1 = new PdfLayer("Nested Layer 1", writer);
PdfLayer nested_2 = new PdfLayer("Nested Layer 2", writer);
nested.addChild(nested_1);
nested.addChild(nested_2);
cb.beginLayer(nested);
ColumnText.showTextAligned(cb, Element.ALIGN_LEFT, new Phrase("nested layers"), 50, 775, 0);
cb.endLayer();
cb.beginLayer(nested_1);
ColumnText.showTextAligned(cb, Element.ALIGN_LEFT, new Phrase("nested layer 1"), 100, 800, 0);
cb.endLayer();
cb.beginLayer(nested_2);
ColumnText.showTextAligned(cb, Element.ALIGN_LEFT, new Phrase("nested layer 2"), 100, 750, 0);
cb.endLayer();
document.close();
}
}</source>
not printed layer
<source lang="java">
import java.io.FileOutputStream; import java.util.ArrayList; import com.lowagie.text.Document; import com.lowagie.text.Element; import com.lowagie.text.Phrase; import com.lowagie.text.pdf.ColumnText; import com.lowagie.text.pdf.PdfContentByte; import com.lowagie.text.pdf.PdfLayer; import com.lowagie.text.pdf.PdfWriter; public class MainClass {
public static void main(String[] args) throws Exception {
Document document = new Document();
PdfWriter writer = PdfWriter
.getInstance(document, new FileOutputStream("2.pdf"));
writer.setPdfVersion(PdfWriter.VERSION_1_5);
document.open();
PdfContentByte cb = writer.getDirectContent();
PdfLayer not_printed = new PdfLayer("not printed", writer);
not_printed.setOnPanel(false);
not_printed.setPrint("Print", false);
cb.beginLayer(not_printed);
ColumnText.showTextAligned(cb, Element.ALIGN_CENTER, new Phrase("PRINT THIS PAGE"), 300, 700,
90);
cb.endLayer();
document.close();
}
}</source>
Radio Group
<source lang="java">
import java.io.FileOutputStream; import java.util.ArrayList; import com.lowagie.text.Document; import com.lowagie.text.Element; import com.lowagie.text.Phrase; import com.lowagie.text.pdf.ColumnText; import com.lowagie.text.pdf.PdfContentByte; import com.lowagie.text.pdf.PdfLayer; import com.lowagie.text.pdf.PdfWriter; public class MainClass {
public static void main(String[] args) throws Exception {
Document document = new Document();
PdfWriter writer = PdfWriter
.getInstance(document, new FileOutputStream("2.pdf"));
writer.setPdfVersion(PdfWriter.VERSION_1_5);
document.open();
PdfContentByte cb = writer.getDirectContent();
PdfLayer radiogroup = PdfLayer.createTitle("Radio Group", writer);
PdfLayer radio1 = new PdfLayer("Radiogroup: layer 1", writer);
radio1.setOn(true);
PdfLayer radio2 = new PdfLayer("Radiogroup: layer 2", writer);
radio2.setOn(false);
PdfLayer radio3 = new PdfLayer("Radiogroup: layer 3", writer);
radio3.setOn(false);
radiogroup.addChild(radio1);
radiogroup.addChild(radio2);
radiogroup.addChild(radio3);
ArrayList options = new ArrayList();
options.add(radio1);
options.add(radio2);
options.add(radio3);
writer.addOCGRadioGroup(options);
cb.beginLayer(radio1);
ColumnText.showTextAligned(cb, Element.ALIGN_LEFT, new Phrase("option 1"), 50, 600, 0);
cb.endLayer();
cb.beginLayer(radio2);
ColumnText.showTextAligned(cb, Element.ALIGN_LEFT, new Phrase("option 2"), 50, 575, 0);
cb.endLayer();
cb.beginLayer(radio3);
ColumnText.showTextAligned(cb, Element.ALIGN_LEFT, new Phrase("option 3"), 50, 550, 0);
cb.endLayer();
document.close();
}
}</source>
Show hide text with layer
<source lang="java">
import java.io.FileOutputStream; import java.util.ArrayList; import com.lowagie.text.Chunk; import com.lowagie.text.Document; import com.lowagie.text.Phrase; import com.lowagie.text.pdf.BaseFont; import com.lowagie.text.pdf.PdfAction; import com.lowagie.text.pdf.PdfContentByte; import com.lowagie.text.pdf.PdfLayer; import com.lowagie.text.pdf.PdfWriter; public class MainClass {
public static void main(String[] args) throws Exception {
Document document = new Document();
PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("2.pdf"));
writer.setPdfVersion(PdfWriter.VERSION_1_5);
document.open();
PdfLayer a1 = new PdfLayer("answer 1", writer);
a1.setOn(false);
BaseFont bf = BaseFont.createFont(BaseFont.HELVETICA, BaseFont.WINANSI, BaseFont.NOT_EMBEDDED);
PdfContentByte cb = writer.getDirectContent();
cb.beginText();
cb.setTextMatrix(50, 790);
cb.setLeading(24);
cb.setFontAndSize(bf, 18);
cb.newlineShowText("This is a question?");
cb.beginLayer(a1);
cb.setRGBColorFill(0xFF, 0x00, 0x00);
cb.newlineShowText("This is the answer");
cb.resetRGBColorFill();
cb.endLayer();
cb.endText();
ArrayList stateOn = new ArrayList();
stateOn.add("ON");
stateOn.add(a1);
PdfAction actionOn = PdfAction.setOCGstate(stateOn, true);
ArrayList stateOff = new ArrayList();
stateOff.add("OFF");
stateOff.add(a1);
PdfAction actionOff = PdfAction.setOCGstate(stateOff, true);
ArrayList stateToggle = new ArrayList();
stateToggle.add("Toggle");
stateToggle.add(a1);
PdfAction actionToggle = PdfAction.setOCGstate(stateToggle, true);
Phrase p = new Phrase("Change the state of the answers:");
Chunk on = new Chunk(" on ").setAction(actionOn);
p.add(on);
Chunk off = new Chunk("/ off ").setAction(actionOff);
p.add(off);
Chunk toggle = new Chunk("/ toggle").setAction(actionToggle);
p.add(toggle);
document.add(p);
document.close();
}
}</source>
Text on layer
<source lang="java">
import java.io.FileOutputStream; import com.lowagie.text.Document; import com.lowagie.text.pdf.BaseFont; import com.lowagie.text.pdf.PdfContentByte; import com.lowagie.text.pdf.PdfLayer; import com.lowagie.text.pdf.PdfWriter; public class MainClass {
public static void main(String[] args) throws Exception {
Document document = new Document();
PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("2.pdf"));
writer.setPdfVersion(PdfWriter.VERSION_1_5);
document.open();
PdfLayer layer = new PdfLayer("Do you see me?", writer);
BaseFont bf = BaseFont.createFont(BaseFont.HELVETICA, BaseFont.WINANSI, BaseFont.NOT_EMBEDDED);
PdfContentByte cb = writer.getDirectContent();
cb.beginText();
cb.setTextMatrix(50, 790);
cb.setLeading(24);
cb.setFontAndSize(bf, 18);
cb.showText("Do you see me?");
cb.beginLayer(layer);
cb.newlineShowText("this is a test");
cb.endLayer();
cb.endText();
document.close();
}
}</source>
Using Layer
<source lang="java">
import java.io.FileOutputStream; import com.lowagie.text.Document; import com.lowagie.text.pdf.GrayColor; import com.lowagie.text.pdf.PdfContentByte; import com.lowagie.text.pdf.PdfWriter; public class MainClass {
public static void main(String[] args) throws Exception {
Document document = new Document();
PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("2.pdf"));
document.open();
PdfContentByte over = writer.getDirectContent();
PdfContentByte under = writer.getDirectContentUnder();
drawLayer(over, 70, 750, 150, 100);
drawLayer(under, 70, 730, 150, 100);
document.close();
}
public static void drawLayer(PdfContentByte cb, float llx, float lly, float w, float h) {
cb.saveState();
cb.setColorFill(new GrayColor(0.9f));
cb.setColorStroke(new GrayColor(0.2f));
cb.moveTo(llx, lly);
cb.lineTo(llx + w / 4, lly + h / 3);
cb.lineTo(llx + 7 * w / 8, lly + h / 3);
cb.lineTo(llx + (2 * w) / 3, lly);
cb.closePathFillStroke();
cb.restoreState();
}
}</source>
