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DemchaAV merged 1 commit into from
Jul 5, 2026
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docs(examples): add a poetry title-page example #292

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2 changes: 2 additions & 0 deletions examples/src/main/java/com/demcha/examples/GenerateAllExamples.java
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Expand Up @@ -40,6 +40,7 @@
import com.demcha.examples.features.text.RichTextShowcaseExample;
import com.demcha.examples.features.text.SectionPresetsExample;
import com.demcha.examples.features.title.BookTemplateExample;
import com.demcha.examples.features.title.PoetryTitlePageExample;
import com.demcha.examples.features.transforms.TransformsExample;
import com.demcha.examples.flagships.BusinessReportExample;
import com.demcha.examples.flagships.EngineDeckExample;
Expand Down Expand Up @@ -211,5 +212,6 @@ public static void main(String[] args) throws Exception {
System.out.println("Generated: " + EngineDeckExample.generate());
System.out.println("Generated: " + FinancialReportExample.generate());
System.out.println("Generated: " + BookTemplateExample.generate());
System.out.println("Generated: " + PoetryTitlePageExample.generate());
}
}
126 changes: 126 additions & 0 deletions examples/src/main/java/com/demcha/examples/features/title/PoetryTitlePageExample.java
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@@ -0,0 +1,126 @@
package com.demcha.examples.features.title;

import com.demcha.compose.GraphCompose;
import com.demcha.compose.document.api.DocumentPageSize;
import com.demcha.compose.document.api.DocumentSession;
import com.demcha.compose.document.dsl.ParagraphBuilder;
import com.demcha.compose.document.dsl.PathBuilder;
import com.demcha.compose.document.dsl.SectionBuilder;
import com.demcha.compose.document.node.DocumentNode;
import com.demcha.compose.document.node.LayerAlign;
import com.demcha.compose.document.node.TextAlign;
import com.demcha.compose.document.style.DocumentColor;
import com.demcha.compose.document.style.DocumentInsets;
import com.demcha.compose.document.style.DocumentTextDecoration;
import com.demcha.compose.document.style.DocumentTextStyle;
import com.demcha.compose.font.FontName;
import com.demcha.examples.support.ExampleOutputPaths;

import java.nio.file.Path;

/**
* Poetry cover with a two-wave header band at the top (full bleed) and two
* smaller waves at the foot — the place/year caption sits directly on the
* bottom waves, while the title stays on the white middle.
*
* <p>All four waves are full-page-sized {@code PathNode}s drawn as back layers
* (so they sit behind the text), each painting only its filled region — the
* two top waves paint the upper band, the two bottom waves the lower band.</p>
*/
public final class PoetryTitlePageExample {

private PoetryTitlePageExample() {
}

public static Path generate() throws Exception {
Path outputFile = ExampleOutputPaths.prepare("features/title", "poetry-title.pdf");

DocumentPageSize page = DocumentPageSize.A4;
double pw = page.width();
double ph = page.height();

FontName serif = FontName.PT_SERIF; // кириллица + 4 начертания
DocumentColor ink = DocumentColor.rgb(20, 35, 80); // тёмно-синий — для текста на белом
DocumentColor onWave = DocumentColor.WHITE; // для подписи на нижней волне

DocumentTextStyle authorStyle = DocumentTextStyle.builder().fontName(serif).size(15)
.decoration(DocumentTextDecoration.ITALIC).color(ink).build();
DocumentTextStyle titleStyle = DocumentTextStyle.builder().fontName(serif).size(54)
.decoration(DocumentTextDecoration.BOLD_ITALIC).color(ink).build();
DocumentTextStyle subtitleStyle = DocumentTextStyle.builder().fontName(serif).size(22)
.decoration(DocumentTextDecoration.BOLD_ITALIC).color(ink).build();
DocumentTextStyle footerStyle = DocumentTextStyle.builder().fontName(serif).size(12)
.decoration(DocumentTextDecoration.BOLD).color(onWave).build();

DocumentColor pale = DocumentColor.rgb(206, 219, 246); // бледная волна (сзади)
DocumentColor deep = DocumentColor.rgb(120, 152, 218); // насыщенная волна (спереди)

// ── ШАПКА: две волны сверху (волнистый НИЖНИЙ край) ──
DocumentNode topBack = new PathBuilder().name("TopBack").size(pw, ph)
.moveTo(0.0, 1.0).lineTo(1.0, 1.0).lineTo(1.0, 0.82)
.curveTo(0.66, 0.72, 0.33, 0.95, 0.0, 0.84)
.closePath().fillColor(pale).build();
DocumentNode topFront = new PathBuilder().name("TopFront").size(pw, ph)
.moveTo(0.0, 1.0).lineTo(1.0, 1.0).lineTo(1.0, 0.88)
.curveTo(0.70, 0.97, 0.30, 0.80, 0.0, 0.90)
.closePath().fillColor(deep).build();

// ── НИЗ: две волны поменьше (волнистый ВЕРХНИЙ край) ──
DocumentNode botBack = new PathBuilder().name("BotBack").size(pw, ph)
.moveTo(0.0, 0.0).lineTo(1.0, 0.0).lineTo(1.0, 0.155)
.curveTo(0.66, 0.205, 0.33, 0.075, 0.0, 0.16)
.closePath().fillColor(pale).build();
DocumentNode botFront = new PathBuilder().name("BotFront").size(pw, ph)
.moveTo(0.0, 0.0).lineTo(1.0, 0.0).lineTo(1.0, 0.11)
.curveTo(0.70, 0.05, 0.30, 0.17, 0.0, 0.095)
.closePath().fillColor(deep).build();

// Title + subtitle — on the white middle
DocumentNode titleBlock = new SectionBuilder().spacing(10)
.addParagraph(p -> p.text("The Waves").textStyle(titleStyle)
.align(TextAlign.CENTER).margin(DocumentInsets.zero()))
.addParagraph(p -> p.text("A Novel").textStyle(subtitleStyle)
.align(TextAlign.CENTER).margin(DocumentInsets.zero()))
.build();

// City + year — sit on the bottom waves
DocumentNode footerBlock = new SectionBuilder().spacing(2)
.addParagraph(p -> p.text("LONDON").textStyle(footerStyle)
.align(TextAlign.CENTER).margin(DocumentInsets.zero()))
.addParagraph(p -> p.text("1931").textStyle(footerStyle)
.align(TextAlign.CENTER).margin(DocumentInsets.zero()))
.build();

DocumentNode authorBlock = new ParagraphBuilder()
.text("Virginia Woolf").textStyle(authorStyle)
.align(TextAlign.CENTER).margin(DocumentInsets.zero()).build();

try (DocumentSession document = GraphCompose.document(outputFile)
.pageSize(page)
.margin(0, 0, 0, 0) // full bleed — волны до краёв
.create()) {

document.pageFlow()
.name("TitlePage")
.addContainer(c -> c
.name("Cover")
.rectangle(pw, ph) // холст = весь лист
.back(topBack) // шапка: 2 волны (сзади)
.back(topFront)
.back(botBack) // низ: 2 волны
.back(botFront)
.position(authorBlock, 0, 196, LayerAlign.TOP_CENTER) // автор под шапкой, на белом
.center(titleBlock) // заголовок по центру, на белом
.position(footerBlock, 0, -54, LayerAlign.BOTTOM_CENTER)) // подпись НА нижних волнах
.build();

document.buildPdf();
}
return outputFile;
}

public static void main(String[] args) throws Exception {
Path pdf = generate();
System.out.println("Wrote " + pdf);
}
}
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