Файловый менеджер

Файловый менеджер - Редактировать - /usr/lib/python3/dist-packages/reportlab/pdfgen/pathobject.py

Назад
#Copyright ReportLab Europe Ltd. 2000-2017 #see license.txt for license details #history https://hg.reportlab.com/hg-public/reportlab/log/tip/src/reportlab/pdfgen/pathobject.py __version__='3.3.0' __doc__=""" PDFPathObject is an efficient way to draw paths on a Canvas. Do not instantiate directly, obtain one from the Canvas instead. Progress Reports: 8.83, 2000-01-13, gmcm: created from pdfgen.py """ from reportlab.pdfgen import pdfgeom from reportlab.lib.rl_accel import fp_str class PDFPathObject: """Represents a graphic path. There are certain 'modes' to PDF drawing, and making a separate object to expose Path operations ensures they are completed with no run-time overhead. Ask the Canvas for a PDFPath with getNewPathObject(); moveto/lineto/ curveto wherever you want; add whole shapes; and then add it back into the canvas with one of the relevant operators. Path objects are probably not long, so we pack onto one line the code argument allows a canvas to get the operatiosn appended directly so avoiding the final getCode """ def __init__(self,code=None): self._code = (code,[])[code is None] self._code_append = self._init_code_append def _init_code_append(self,c): assert c.endswith(' m') or c.endswith(' re'), 'path must start with a moveto or rect' code_append = self._code.append code_append('n') code_append(c) self._code_append = code_append def getCode(self): "pack onto one line; used internally" return ' '.join(self._code) def moveTo(self, x, y): self._code_append('%s m' % fp_str(x,y)) def lineTo(self, x, y): self._code_append('%s l' % fp_str(x,y)) def curveTo(self, x1, y1, x2, y2, x3, y3): self._code_append('%s c' % fp_str(x1, y1, x2, y2, x3, y3)) def arc(self, x1,y1, x2,y2, startAng=0, extent=90): """Contributed to piddlePDF by Robert Kern, 28/7/99. Draw a partial ellipse inscribed within the rectangle x1,y1,x2,y2, starting at startAng degrees and covering extent degrees. Angles start with 0 to the right (+x) and increase counter-clockwise. These should have x1<x2 and y1<y2. The algorithm is an elliptical generalization of the formulae in Jim Fitzsimmon's TeX tutorial <URL: http://www.tinaja.com/bezarc1.pdf>.""" self._curves(pdfgeom.bezierArc(x1,y1, x2,y2, startAng, extent)) def arcTo(self, x1,y1, x2,y2, startAng=0, extent=90): """Like arc, but draws a line from the current point to the start if the start is not the current point.""" self._curves(pdfgeom.bezierArc(x1,y1, x2,y2, startAng, extent),'lineTo') def rect(self, x, y, width, height): """Adds a rectangle to the path""" self._code_append('%s re' % fp_str((x, y, width, height))) def ellipse(self, x, y, width, height): """adds an ellipse to the path""" self._curves(pdfgeom.bezierArc(x, y, x + width,y + height, 0, 360)) def _curves(self,curves,initial='moveTo'): getattr(self,initial)(curves[0][:2]) for curve in curves: self.curveTo(curve[2:]) def circle(self, x_cen, y_cen, r): """adds a circle to the path""" x1 = x_cen - r y1 = y_cen - r width = height = 2r self.ellipse(x1, y1, width, height) def roundRect(self, x, y, width, height, radius): """Draws a rectangle with rounded corners. The corners are approximately quadrants of a circle, with the given radius.""" #use a precomputed set of factors for the bezier approximation #to a circle. There are six relevant points on the x axis and y axis. #sketch them and it should all make sense! t = 0.4472 radius x0 = x x1 = x0 + t x2 = x0 + radius x3 = x0 + width - radius x4 = x0 + width - t x5 = x0 + width y0 = y y1 = y0 + t y2 = y0 + radius y3 = y0 + height - radius y4 = y0 + height - t y5 = y0 + height self.moveTo(x2, y0) self.lineTo(x3, y0) #bottom row self.curveTo(x4, y0, x5, y1, x5, y2) #bottom right self.lineTo(x5, y3) #right edge self.curveTo(x5, y4, x4, y5, x3, y5) #top right self.lineTo(x2, y5) #top row self.curveTo(x1, y5, x0, y4, x0, y3) #top left self.lineTo(x0, y2) #left edge self.curveTo(x0, y1, x1, y0, x2, y0) #bottom left self.close() def close(self): "draws a line back to where it started" self._code_append('h')

| ver. 1.4 | Github | . | PHP 7.4.3-4ubuntu2.28 | Генерация страницы: 0 | proxy | phpinfo | Настройка