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✏️ Editing: line_demo.py

###
## * << Haru Free PDF Library 2.0.0 >> -- line_demo.c
## *
## * Copyright (c) 1999-2006 Takeshi Kanno <takeshi_kanno@est.hi-ho.ne.jp>
## *
## * Permission to use, copy, modify, distribute and sell this software
## * and its documentation for any purpose is hereby granted without fee,
## * provided that the above copyright notice appear in all copies and
## * that both that copyright notice and this permission notice appear
## * in supporting documentation.
## * It is provided "as is" without express or implied warranty.
## *
##

## port to python by Li Jun
## http://groups.google.com/group/pythoncia

import os, sys

from ctypes import *
up=2
def setlibpath(up):
    import sys
    path=os.path.normpath(os.path.split(os.path.realpath(__file__))[0]+'\..'*up)
    if path not in sys.path:
        sys.path.append(path)

setlibpath(up)

from haru import *
from haru.c_func import *
from haru.hpdf_errorcode import *

@HPDF_Error_Handler(None, HPDF_UINT, HPDF_UINT, c_void_p)
def error_handler (error_no, detail_no, user_data):
    global pdf
    printf ("ERROR: %s, detail_no=%u\n", error_detail[error_no],
                detail_no)
    HPDF_Free (pdf)
    sys.exit(1)

def draw_line  (page, x, y, label):
    HPDF_Page_BeginText (page)
    HPDF_Page_MoveTextPos (page, x, y - 10)
    HPDF_Page_ShowText (page, label)
    HPDF_Page_EndText (page)

HPDF_Page_MoveTo (page, x, y - 15)
    HPDF_Page_LineTo (page, x + 220, y - 15)
    HPDF_Page_Stroke (page)

def draw_line2  (page, x, y, label):
    HPDF_Page_BeginText (page)
    HPDF_Page_MoveTextPos (page, x, y)
    HPDF_Page_ShowText (page, label)
    HPDF_Page_EndText (page)

HPDF_Page_MoveTo (page, x + 30, y - 25)
    HPDF_Page_LineTo (page, x + 160, y - 25)
    HPDF_Page_Stroke (page)

def draw_rect (page,  x, y, label):
    HPDF_Page_BeginText (page)
    HPDF_Page_MoveTextPos (page, x, y - 10)
    HPDF_Page_ShowText (page, label)
    HPDF_Page_EndText (page)

HPDF_Page_Rectangle(page, x, y - 40, 220, 25)

def main ():
    global pdf

page_title = "Line Example"

DASH_MODE1= [3]
    DASH_MODE2= [3, 7]
    DASH_MODE3= [8, 7, 2, 7]

fname=os.path.realpath(sys.argv[0])
    fname=fname[:fname.rfind('.')]+'.pdf'

pdf = HPDF_New (error_handler, NULL)
    if (not pdf):
        printf ("error: cannot create PdfDoc object\n")
        return 1

# create default-font
    font = HPDF_GetFont (pdf, "Helvetica", NULL)

# add a new page object.
    page = HPDF_AddPage (pdf)

# print the lines of the page.
    HPDF_Page_SetLineWidth (page, 1)
    HPDF_Page_Rectangle (page, 50, 50, HPDF_Page_GetWidth(page) - 100,
                HPDF_Page_GetHeight (page) - 110)
    HPDF_Page_Stroke (page)

# print the title of the page (with positioning center).
    HPDF_Page_SetFontAndSize (page, font, 24)
    tw = HPDF_Page_TextWidth (page, page_title)
    HPDF_Page_BeginText (page)
    HPDF_Page_MoveTextPos (page, (HPDF_Page_GetWidth(page) - tw) / 2,
                HPDF_Page_GetHeight (page) - 50)
    HPDF_Page_ShowText (page, page_title)
    HPDF_Page_EndText (page)

HPDF_Page_SetFontAndSize (page, font, 10)

# Draw various widths of lines.
    HPDF_Page_SetLineWidth (page, 0)
    draw_line (page, 60, 770, "line width = 0")

HPDF_Page_SetLineWidth (page, 1.0)
    draw_line (page, 60, 740, "line width = 1.0")

HPDF_Page_SetLineWidth (page, 2.0)
    draw_line (page, 60, 710, "line width = 2.0")

# Line dash pattern
    HPDF_Page_SetLineWidth (page, 1.0)

HPDF_Page_SetDash (page, DASH_MODE1, 1, 1)
    draw_line (page, 60, 680, "dash_ptn=[3], phase=1 -- "
                "2 on, 3 off, 3 on...")

HPDF_Page_SetDash (page, DASH_MODE2, 2, 2)
    draw_line (page, 60, 650, "dash_ptn=[7, 3], phase=2 -- "
                "5 on 3 off, 7 on,...")

HPDF_Page_SetDash (page, DASH_MODE3, 4, 0)
    draw_line (page, 60, 620, "dash_ptn=[8, 7, 2, 7], phase=0")

HPDF_Page_SetDash (page, NULL, 0, 0)

HPDF_Page_SetLineWidth (page, 30)
    HPDF_Page_SetRGBStroke (page, 0.0, 0.5, 0.0)

# Line Cap Style
    HPDF_Page_SetLineCap (page, HPDF_BUTT_END)
    draw_line2 (page, 60, 570, "PDF_BUTT_END")

HPDF_Page_SetLineCap (page, HPDF_ROUND_END)
    draw_line2 (page, 60, 505, "PDF_ROUND_END")

HPDF_Page_SetLineCap (page, HPDF_PROJECTING_SQUARE_END)
    draw_line2 (page, 60, 440, "PDF_PROJECTING_SCUARE_END")

# Line Join Style
    HPDF_Page_SetLineWidth (page, 30)
    HPDF_Page_SetRGBStroke (page, 0.0, 0.0, 0.5)

HPDF_Page_SetLineJoin (page, HPDF_MITER_JOIN)
    HPDF_Page_MoveTo (page, 120, 300)
    HPDF_Page_LineTo (page, 160, 340)
    HPDF_Page_LineTo (page, 200, 300)
    HPDF_Page_Stroke (page)

HPDF_Page_BeginText (page)
    HPDF_Page_MoveTextPos (page, 60, 360)
    HPDF_Page_ShowText (page, "PDF_MITER_JOIN")
    HPDF_Page_EndText (page)

HPDF_Page_SetLineJoin (page, HPDF_ROUND_JOIN)
    HPDF_Page_MoveTo (page, 120, 195)
    HPDF_Page_LineTo (page, 160, 235)
    HPDF_Page_LineTo (page, 200, 195)
    HPDF_Page_Stroke (page)

HPDF_Page_BeginText (page)
    HPDF_Page_MoveTextPos (page, 60, 255)
    HPDF_Page_ShowText (page, "PDF_ROUND_JOIN")
    HPDF_Page_EndText (page)

HPDF_Page_SetLineJoin (page, HPDF_BEVEL_JOIN)
    HPDF_Page_MoveTo (page, 120, 90)
    HPDF_Page_LineTo (page, 160, 130)
    HPDF_Page_LineTo (page, 200, 90)
    HPDF_Page_Stroke (page)

HPDF_Page_BeginText (page)
    HPDF_Page_MoveTextPos (page, 60, 150)
    HPDF_Page_ShowText (page, "PDF_BEVEL_JOIN")
    HPDF_Page_EndText (page)

# Draw Rectangle
    HPDF_Page_SetLineWidth (page, 2)
    HPDF_Page_SetRGBStroke (page, 0, 0, 0)
    HPDF_Page_SetRGBFill (page, 0.75, 0.0, 0.0)

draw_rect (page, 300, 770, "Stroke")
    HPDF_Page_Stroke (page)

draw_rect (page, 300, 720, "Fill")
    HPDF_Page_Fill (page)

draw_rect (page, 300, 670, "Fill then Stroke")
    HPDF_Page_FillStroke (page)

# Clip Rect
    HPDF_Page_GSave (page);  # Save the current graphic state
    draw_rect (page, 300, 620, "Clip Rectangle")
    HPDF_Page_Clip (page)
    HPDF_Page_Stroke (page)
    HPDF_Page_SetFontAndSize (page, font, 13)

HPDF_Page_BeginText (page)
    HPDF_Page_MoveTextPos (page, 290, 600)
    HPDF_Page_SetTextLeading (page, 12)
    HPDF_Page_ShowText (page,
                "Clip Clip Clip Clip Clip Clipi Clip Clip Clip")
    HPDF_Page_ShowTextNextLine (page,
                "Clip Clip Clip Clip Clip Clip Clip Clip Clip")
    HPDF_Page_ShowTextNextLine (page,
                "Clip Clip Clip Clip Clip Clip Clip Clip Clip")
    HPDF_Page_EndText (page)
    HPDF_Page_GRestore (page)

# Curve Example(CurveTo2)
    x = 330
    y = 440
    x1 = 430
    y1 = 530
    x2 = 480
    y2 = 470
    x3 = 480
    y3 = 90

HPDF_Page_SetRGBFill (page, 0, 0, 0)

HPDF_Page_BeginText (page)
    HPDF_Page_MoveTextPos (page, 300, 540)
    HPDF_Page_ShowText (page, "CurveTo2(x1, y1, x2. y2)")
    HPDF_Page_EndText (page)

HPDF_Page_BeginText (page)
    HPDF_Page_MoveTextPos (page, x + 5, y - 5)
    HPDF_Page_ShowText (page, "Current point")
    HPDF_Page_MoveTextPos (page, x1 - x, y1 - y)
    HPDF_Page_ShowText (page, "(x1, y1)")
    HPDF_Page_MoveTextPos (page, x2 - x1, y2 - y1)
    HPDF_Page_ShowText (page, "(x2, y2)")
    HPDF_Page_EndText (page)

HPDF_Page_SetDash (page, DASH_MODE1, 1, 0)

HPDF_Page_SetLineWidth (page, 0.5)
    HPDF_Page_MoveTo (page, x1, y1)
    HPDF_Page_LineTo (page, x2, y2)
    HPDF_Page_Stroke (page)

HPDF_Page_SetDash (page, NULL, 0, 0)

HPDF_Page_SetLineWidth (page, 1.5)

HPDF_Page_MoveTo (page, x, y)
    HPDF_Page_CurveTo2 (page, x1, y1, x2, y2)
    HPDF_Page_Stroke (page)

# Curve Example(CurveTo3)
    y -= 150
    y1 -= 150
    y2 -= 150

HPDF_Page_BeginText (page)
    HPDF_Page_MoveTextPos (page, 300, 390)
    HPDF_Page_ShowText (page, "CurveTo3(x1, y1, x2. y2)")
    HPDF_Page_EndText (page)

HPDF_Page_SetDash (page, DASH_MODE1, 1, 0)

HPDF_Page_SetLineWidth (page, 0.5)
    HPDF_Page_MoveTo (page, x, y)
    HPDF_Page_LineTo (page, x1, y1)
    HPDF_Page_Stroke (page)

HPDF_Page_SetDash (page, NULL, 0, 0)

HPDF_Page_SetLineWidth (page, 1.5)
    HPDF_Page_MoveTo (page, x, y)
    HPDF_Page_CurveTo3 (page, x1, y1, x2, y2)
    HPDF_Page_Stroke (page)

# Curve Example(CurveTo)
    y -= 150
    y1 -= 160
    y2 -= 130
    x2 += 10

HPDF_Page_BeginText (page)
    HPDF_Page_MoveTextPos (page, 300, 240)
    HPDF_Page_ShowText (page, "CurveTo(x1, y1, x2. y2, x3, y3)")
    HPDF_Page_EndText (page)

HPDF_Page_SetDash (page, DASH_MODE1, 1, 0)

HPDF_Page_SetLineWidth (page, 0.5)
    HPDF_Page_MoveTo (page, x, y)
    HPDF_Page_LineTo (page, x1, y1)
    HPDF_Page_Stroke (page)
    HPDF_Page_MoveTo (page, x2, y2)
    HPDF_Page_LineTo (page, x3, y3)
    HPDF_Page_Stroke (page)

HPDF_Page_SetDash (page, NULL, 0, 0)

HPDF_Page_SetLineWidth (page, 1.5)
    HPDF_Page_MoveTo (page, x, y)
    HPDF_Page_CurveTo (page, x1, y1, x2, y2, x3, y3)
    HPDF_Page_Stroke (page)

# save the document to a file
    HPDF_SaveToFile (pdf, fname)

# clean up
    HPDF_Free (pdf)

return 0

main()

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