本文整理汇总了Python中reportlab.pdfgen.canvas.Canvas.linearGradient方法的典型用法代码示例。如果您正苦于以下问题：Python Canvas.linearGradient方法的具体用法？Python Canvas.linearGradient怎么用？Python Canvas.linearGradient使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类reportlab.pdfgen.canvas.Canvas的用法示例。
在下文中一共展示了Canvas.linearGradient方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: PDFGenerator
# 需要导入模块: from reportlab.pdfgen.canvas import Canvas [as 别名]
# 或者: from reportlab.pdfgen.canvas.Canvas import linearGradient [as 别名]
#.........这里部分代码省略.........
for stop in stops:
if stop[1][2] < 1.0:
transparency = True
break
if transparency:
self.fill_tr_gradient(obj, pdfpath, fill_trafo, gradient)
else:
self.fill_gradient(pdfpath, fill_trafo, gradient)
elif fill_style[1] == sk2_const.FILL_PATTERN:
pattern = fill_style[2]
self.fill_pattern(obj, pdfpath, fill_trafo, pattern)
def fill_gradient(self, pdfpath, fill_trafo, gradient):
self.canvas.saveState()
self.canvas.clipPath(pdfpath, 0, 0)
if fill_trafo:
self.canvas.transform(*fill_trafo)
grad_type = gradient[0]
sp, ep = gradient[1]
stops = gradient[2]
colors = []
positions = []
for offset, color in stops:
positions.append(offset)
colors.append(self.get_pdfcolor(color))
if grad_type == sk2_const.GRADIENT_RADIAL:
radius = libgeom.distance(sp, ep)
self.canvas.radialGradient(sp[0], sp[1], radius, colors,
positions, True)
else:
x0, y0 = sp
x1, y1 = ep
self.canvas.linearGradient(x0, y0, x1, y1, colors,
positions, True)
self.canvas.restoreState()
def fill_tr_gradient(self, obj, pdfpath, fill_trafo, gradient):
grad_type = gradient[0]
if grad_type == sk2_const.GRADIENT_RADIAL:
self.fill_radial_tr_gradient(obj, pdfpath, fill_trafo, gradient)
else:
self.fill_linear_tr_gradient(obj, pdfpath, fill_trafo, gradient)
def get_grcolor_at_point(self, stops, point=0.0):
if not point:return self.get_pdfcolor(stops[0][1])
if point == 1.0:return self.get_pdfcolor(stops[-1][1])
stop0 = stops[0]
stop1 = None
for item in stops:
if item[0] < point:stop0 = item
if item[0] >= point:
stop1 = item
break
size = stop1[0] - stop0[0]
if not size:
color = stop1[1]
else:
coef = (point - stop0[0]) / size
color = self.cms.mix_colors(stop0[1], stop1[1], coef)
return self.get_pdfcolor(color)
def fill_linear_tr_gradient(self, obj, pdfpath, fill_trafo, gradient):
if not fill_trafo:
fill_trafo = [1.0, 0.0, 0.0, 1.0, 0.0, 0.0]
stops = gradient[2]