PDFlib Cookbook

cookbook

graphics/rounded_rectangle

Create a rectangle with rounded corners.

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/*
 * Rounded rectangles:
 * Create some rectangle with the corners being rounded
 *
 * Create two simple rectangles using the linejoin parameter for rounded
 * corners. Define a path for a rectangle with corners rounded by a given
 * radius. Create three rhombuses using the linejoin and linecap parameters for
 * rounded corners.
 *
 * Required software: PDFlib/PDFlib+PDI/PPS 9
 * Required data: none
 */
package com.pdflib.cookbook.pdflib.graphics;

import com.pdflib.pdflib;
import com.pdflib.PDFlibException;

public class rounded_rectangle
{
    public static void main (String argv[])
    {
        /* This is where the data files are. Adjust as necessary. */
        String searchpath = "../input";
        String outfile = "rounded_rectangle.pdf";
        String title = "Rounded Rectangle";

        pdflib p = null;

        int font;
        int x = 50, y = 100, radius = 50, width = 400, height = 300;
        int exitcode = 0;

        try {
            p = new pdflib();

            p.set_option("searchpath={" + searchpath + "}");

            /* This means we must check return values of load_font() etc. */
            p.set_option("errorpolicy=return");

            if (p.begin_document(outfile, "") == -1)
                throw new Exception("Error: " + p.get_errmsg());

            p.set_info("Creator", "PDFlib Cookbook");
            p.set_info("Title", title);

            font = p.load_font("Helvetica", "unicode", "");
            if (font == -1)
            throw new Exception("Error: " + p.get_errmsg());

            /* Start page 1 */
            p.begin_page_ext(0, 0, "width=a4.width height=a4.height");

            p.setlinewidth(15.0);

            /* Red rectangle */
            p.setcolor("stroke", "rgb", 1.0, 0.0, 0.0, 0.0);
            p.rect(100, 700, 100, 100);
            p.stroke();
            p.fit_textline("Simple rectangle", 250, 750, "font=" + font +
                " fontsize=16");

            /* Red rectangle with the "linejoin" parameter set */
            p.set_graphics_option("linejoin=1");
            p.rect(100, 500, 100, 100);
            p.stroke();
            p.fit_textline("Simple rectangle with linejoin=1", 250, 550,
                "font=" + font + " fontsize=16");

            /* Define a path for a rectangle with corners rounded by a given radius.
             * Start from the lower left corner and proceed counterclockwise.
             */
            p.moveto(x + radius, y);
            /* Start of the arc segment in the lower right corner */
            p.lineto(x + width - radius, y);
            /* Arc segment in the lower right corner */
            p.arc(x + width - radius, y + radius, radius, 270, 360);
            /* Start of the arc segment in the upper right corner */
            p.lineto(x + width, y + height - radius );
            /* Arc segment in the upper right corner */
            p.arc(x + width - radius, y + height - radius, radius, 0, 90);
            /* Start of the arc segment in the upper left corner */
            p.lineto(x + radius, y + height);
            /* Arc segment in the upper left corner */
            p.arc(x + radius, y + height - radius, radius, 90, 180);
            /* Start of the arc segment in the lower left corner */
            p.lineto(x , y + radius);
            /* Arc segment in the lower left corner */
            p.arc(x + radius, y + radius, radius, 180, 270);

            p.stroke();

            p.fit_textline("Rectangle with corners rounded by a defined radius",
                70, 60, "font=" + font + " fontsize=16");

            /* Reset the linejoin parameter */
            p.set_graphics_option("linejoin=0");

            p.end_page_ext("");

            /* Start page 2 */
            p.begin_page_ext(0, 0, "width=a4.width height=a4.height");

            p.setlinewidth(15.0);

            /* Blue rhombus without the "linejoin" parameter set */
            p.setcolor("stroke", "rgb", 0.0, 0.0, 1.0, 0.0);
            p.moveto(100, 700);     // left corner
            p.lineto(200, 800);     // upper corner
            p.lineto(300, 700);     // right corner
            p.lineto(200, 600);     // lower corner
            p.lineto(100, 700);     // left corner
            p.stroke();
            p.fit_textline("Rhombus", 320, 695, "font=" + font + " fontsize=16");

            /* Blue rhombus with the "linejoin" parameter set */
            p.set_graphics_option("linejoin=1");
            p.moveto(100, 450);     // left corner
            p.lineto(200, 550);     // upper corner
            p.lineto(300, 450);     // right corner
            p.lineto(200, 350);     // lower corner
            p.lineto(100, 450);     // left corner
            p.stroke();
            p.fit_textline("Rhombus with linejoin=1", 320, 445, "font=" +
                font + " fontsize=16");

            /* blue rhombus with linejoin and linecap parameter */
            p.set_graphics_option("linecap=1");
            p.moveto(100, 200);     // left corner
            p.lineto(200, 300);     // upper corner
            p.lineto(300, 200);     // right corner
            p.lineto(200, 100);     // lower corner
            p.lineto(100, 200);     // left corner
            p.stroke();
            p.fit_textline("Rhombus with linejoin=1", 320, 195, "font=" + font +
                " fontsize=16");
            p.fit_textline("and linecap=1", 320, 175, "font=" + font +
                " fontsize=16");

            p.end_page_ext("");

            p.end_document("");

        } catch (PDFlibException e) {
            System.err.println("PDFlib exception occurred:");
            System.err.println("[" + e.get_errnum() + "] " + e.get_apiname() +
                ": " + e.get_errmsg());
            exitcode = 1;
        } catch (Exception e) {
            System.err.println(e);
            exitcode = 1;
        } finally {
            if (p != null) {
                p.delete();
            }
            System.exit(exitcode);
        }
    }
}