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Editing: line_demo.rb
# # << Haru Free PDF Library 2.0.2 >> -- line_demo.rb # # http://libharu.org/ # # Copyright (c) 1999-2006 Takeshi Kanno # # 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. # require "hpdf" def draw_line(page, x, y, text) page.begin_text page.move_text_pos(x, y - 10) page.show_text(text) page.end_text page.move_to(x, y - 15) page.line_to(x + 220, y - 15) page.stroke end def draw_line2(page, x, y, text) page.begin_text page.move_text_pos(x, y) page.show_text(text) page.end_text page.move_to(x + 30, y - 25) page.line_to(x + 160, y - 25) page.stroke end def draw_rect(page, x, y, text) page.begin_text page.move_text_pos(x, y - 10) page.show_text(text) page.end_text page.rectangle(x, y - 40, 220, 25) end pdf = HPDFDoc.new pdf.set_compression_mode(HPDFDoc::HPDF_COMP_ALL) font = pdf.get_font("Helvetica", nil) page = pdf.add_page #print the lines of the page.# page.set_line_width(1) x = page.get_width - 100 y = page.get_height - 110 page.rectangle(50, 50, x, y) page.stroke #print the title of the page (with positioning center).# page.set_font_and_size(font, 24) tw = page.text_width('Line Demo') page.begin_text x =(page.get_width - tw) / 2 y = page.get_height - 50 page.move_text_pos(x, y) page.show_text('Line Demo') page.end_text page.set_font_and_size(font, 10) #Draw various widths of lines.# page.set_line_width(0) draw_line(page, 60, 770, 'line width = 0') page.set_line_width(1.0) draw_line(page, 60, 740, 'line width = 1.0') page.set_line_width(2.0) draw_line(page, 60, 710, 'line width = 2.0') #Line dash pattern# page.set_line_width(1.0) page.set_dash([3], 1) draw_line(page, 60, 680, 'dash_ptn=[3], phase=1 -- 2 on, 3 off, 3 on...') page.set_dash([7, 3], 2) draw_line(page, 60, 650, 'dash_ptn=[7, 3], phase=2 -- 5 on 3 off, 7 on,...') page.set_dash([8, 7, 2, 7], 0) draw_line(page, 60, 620, 'dash_ptn=[8, 7, 2, 7], phase=0') page.set_dash([], 0) page.set_line_width(30) page.set_rgb_stroke(0.0, 0.5, 0.0) #Line Cap Style# page.set_line_cap(HPDFDoc::HPDF_BUTT_END) draw_line2(page, 60, 570, 'HPDF_BUTT_END') page.set_line_cap(HPDFDoc::HPDF_ROUND_END) draw_line2(page, 60, 505, 'HPDF_ROUND_END') page.set_line_cap(HPDFDoc::HPDF_PROJECTING_SQUARE_END) draw_line2(page, 60, 440, 'HPDF_PROJECTING_SQUARE_END') #Line Join Style# page.set_line_width(30) page.set_rgb_stroke(0.0, 0.0, 0.5) page.set_line_join(HPDFDoc::HPDF_MITER_JOIN) page.move_to(120, 300) page.line_to(160, 340) page.line_to(200, 300) page.stroke page.begin_text page.move_text_pos(60, 360) page.show_text('HPDF_MITER_JOIN') page.end_text page.set_line_join(HPDFDoc::HPDF_ROUND_JOIN) page.move_to(120, 195) page.line_to(160, 235) page.line_to(200, 195) page.stroke page.begin_text page.move_text_pos(60, 255) page.show_text('HPDF_ROUND_JOIN') page.end_text page.set_line_join(HPDFDoc::HPDF_BEVEL_JOIN) page.move_to(120, 90) page.line_to(160, 130) page.line_to(200, 90) page.stroke page.begin_text page.move_text_pos(60, 150) page.show_text('HPDF_BEVEL_JOIN') page.end_text # Draw rectangle # page.set_line_width(2) page.set_rgb_stroke(0, 0, 0) page.set_rgb_fill(0.75, 0.0, 0.0) draw_rect(page, 300, 770, 'stroke') page.stroke draw_rect(page, 300, 720, 'Fill') page.fill draw_rect(page, 300, 670, 'Fill then stroke') page.fill_stroke #clip Rect# page.gsave # Save the current graphic state# draw_rect(page, 300, 620, 'Clip rectangle') page.clip page.stroke page.set_font_and_size(font, 13) page.begin_text page.move_text_pos(290, 600) page.set_text_leading(12) page.show_text('Clip Clip Clip Clip Clip Clipi Clip Clip Clip') page.show_text_next_line('Clip Clip Clip Clip Clip Clip Clip Clip Clip') page.show_text_next_line('Clip Clip Clip Clip Clip Clip Clip Clip Clip') page.end_text page.grestore x0 = 330 y0 = 440 x1 = 430 y1 = 530 x2 = 480 y2 = 470 x3 = 480 y3 = 90 #Curve Example(curve_to2)# page.set_rgb_fill(0, 0, 0) page.begin_text page.move_text_pos(300, 540) page.show_text('curve_to2(x1, y1, x2. y2)') page.end_text page.begin_text page.move_text_pos(x0 + 5, y0 - 5) page.show_text('Current point') page.move_text_pos(x1 - x0, y1 - y0) page.show_text('(x1, y1)') page.move_text_pos(x2 - x1, y2 - y1) page.show_text('(x2, y2)') page.end_text page.set_dash([], 0) page.set_line_width(0.5) page.move_to(x1, y1) page.line_to(x2, y2) page.stroke page.set_dash([], 0) page.set_line_width(1.5) page.move_to(x0, y0) page.curve_to2(x1, y1, x2, y2) page.stroke #Curve Example(curve_to3)# y0 = y0 - 150 y1 = y1 - 150 y2 = y2 - 150 page.begin_text page.move_text_pos(300, 390) page.show_text('curve_to3(x1, y1, x2. y2)') page.end_text page.begin_text page.move_text_pos(x0 + 5, y0 - 5) page.show_text('Current point') page.move_text_pos(x1 - x0, y1 - y0) page.show_text('(x1, y1)') page.move_text_pos(x2 - x1, y2 - y1) page.show_text('(x2, y2)') page.end_text page.set_dash([3], 1) page.set_line_width(0.5) page.move_to(x0, y0) page.line_to(x1, y1) page.stroke page.set_dash([], 0) page.set_line_width(1.5) page.move_to(x0, y0) page.curve_to3(x1, y1, x2, y2) page.stroke # Curve Example(curve_to) y0 = y0 - 150 y1 = y1 - 160 y2 = y2 - 130 x2 = x2 + 10 page.begin_text page.move_text_pos(300, 240) page.show_text('curve_to(x1, y1, x2. y2, x3, y3)') page.end_text page.begin_text page.move_text_pos(x0 + 5, y0 - 5) page.show_text('Current point') page.move_text_pos(x1 - x0, y1 - y0) page.show_text('(x1, y1)') page.move_text_pos(x2 - x1, y2 - y1) page.show_text('(x2, y2)') page.move_text_pos(x3 - x2, y3 - y2) page.show_text('(x3, y3)') page.end_text page.set_dash([3], 1) page.set_line_width(0.5) page.move_to(x0, y0) page.line_to(x1, y1) page.stroke page.move_to(x2, y2) page.line_to(x3, y3) page.stroke page.set_dash([], 0) page.set_line_width(1.5) page.move_to(x0, y0) page.curve_to(x1, y1, x2, y2, x3, y3) page.stroke pdf.save_to_file($0 + ".pdf")
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