我和pycairo有点麻烦。我想绘制一个chord chart,但由于某种原因我不太明白它只显示文本,而不是它应该绘制的线条。
我使用pygtk(3.0)和pycairo。 Here's the result of what this code draws
以下是代码:
def gen_chart(self, wid, cr):
x = 10
y = 60
cr.set_source_rgb(0, 0, 0)
cr.set_line_width(1)
cr.select_font_face("Open Sans", cairo.FONT_SLANT_NORMAL, cairo.FONT_WEIGHT_NORMAL)
cr.set_font_size(40)
cr.move_to(x, y)
cr.line_to(x, y)
counter = 1
for measure in chord_list: # The list is declared earlier in the source
x += 10
for chord in measure:
cr.move_to(x, y)
cr.show_text(chord)
x += 100
if counter % 4 == 0 or counter == 4:
x = 10
y += 60
cr.move_to(x, y)
cr.line_to(x, y)
counter += 1
counter += 1
cr.move_to(x, y + 10)
cr.move_to(x, y + 10)
cr.stroke()
提前感谢任何可以帮助我的人。
答案 0 :(得分:0)
代码的问题在于它" draw"一条线到同一个坐标,所以它变成了一个没有2d属性的点,这就是为什么它没有绘制任何东西。更正后的代码:
def gen_chart(self, wid, cr):
x = 10
y = 60
cr.set_source_rgb(0, 0, 0)
cr.set_line_width(1)
cr.select_font_face("Open Sans", cairo.FONT_SLANT_NORMAL, cairo.FONT_WEIGHT_NORMAL)
cr.set_font_size(40)
cr.move_to(x, y)
cr.line_to(x, y)
counter = 1
for measure in chord_list:
x += 10
for chord in measure:
cr.move_to(x, y)
cr.show_text(chord)
x += 100
if counter % 4 == 0 or counter == 4:
x = 10
y += 60
cr.move_to(x, y)
cr.line_to(x, y + 10)
counter += 1
counter += 1
cr.move_to(x, y + 80)
cr.stroke()