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graphics/rounded_rectangle

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/* $Id: rounded_rectangle.java,v 1.7 2013/01/15 10:11:59 stm Exp $

 * 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;


    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 + " $Revision: 1.7 $");


        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.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();

            }

        }

    }

}