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Draw basic direction legends at the top and bottom of graph

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This commit is contained in:
XANTRONIX 2025-03-03 22:15:10 -05:00
parent df0b885447
commit 0eecc40839
1 changed files with 32 additions and 0 deletions
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32
lib/xmet/hodograph.py
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@ -118,6 +118,37 @@ class Hodograph():
cr.restore()
def draw_direction_legends(self, cr: cairo.Context, x, y):
cr.save()
cr.select_font_face('Sans',
cairo.FONT_SLANT_NORMAL,
cairo.FONT_WEIGHT_BOLD)
cx, cy = self.sample_to_screen(0, 0)
cr.set_font_size(14)
text = "%d°" % 180
extents = cr.text_extents(text)
cr.move_to(x + cx - extents.width / 2,
y + 4 * extents.height)
cr.show_text(text)
cr.stroke()
text = "%d°" % 0
extents = cr.text_extents(text)
cr.move_to(x + cx - extents.width / 2,
y + self.height - 4 * extents.height)
cr.show_text(text)
cr.stroke()
cr.restore()
COLORS = {
500: (1.0, 0.4, 1.0),
3000: (1.0, 0.4, 0.4),
@ -279,6 +310,7 @@ class Hodograph():
self.draw_sounding(cr, x, y, sounding)
self.draw_speed_legends(cr, x, y)
self.draw_direction_legends(cr, x, y)
self.draw_height_legends(cr, x, y)
cr.reset_clip()