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Add tickAlpha to AxisItem Style Options (#1274)

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* Add tickAlpha setting to AxisItem style

* reworking setTickAlpha docs, redo logic based on types

Co-authored-by: demonchild2112 <denverlovesyou@gmail.com>
This commit is contained in:
Ogi Moore 2020-06-24 17:42:28 -07:00 committed by GitHub
parent 43328eb053
commit 302d66dd67
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 21 additions and 4 deletions
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17
pyqtgraph/graphicsItems/AxisItem.py
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@ -69,6 +69,7 @@ class AxisItem(GraphicsWidget):
'tickLength': maxTickLength, 'tickLength': maxTickLength,
'maxTickLevel': 2, 'maxTickLevel': 2,
'maxTextLevel': 2, 'maxTextLevel': 2,
'tickAlpha': None, ## If not none, use this alpha for all ticks.
} }
self.textWidth = 30 ## Keeps track of maximum width / height of tick text self.textWidth = 30 ## Keeps track of maximum width / height of tick text
@ -150,6 +151,11 @@ class AxisItem(GraphicsWidget):
showValues (bool) indicates whether text is displayed adjacent showValues (bool) indicates whether text is displayed adjacent
to ticks. to ticks.
tickAlpha (float or int or None) If None, pyqtgraph will draw the
ticks with the alpha it deems appropriate. Otherwise,
the alpha will be fixed at the value passed. With int,
accepted values are [0..255]. With vaule of type
float, accepted values are from [0..1].
=================== ======================================================= =================== =======================================================
Added in version 0.9.9 Added in version 0.9.9
@ -956,9 +962,20 @@ class AxisItem(GraphicsWidget):
## length of tick ## length of tick
tickLength = self.style['tickLength'] / ((i*0.5)+1.0) tickLength = self.style['tickLength'] / ((i*0.5)+1.0)
lineAlpha = self.style["tickAlpha"]
if lineAlpha is None:
lineAlpha = 255 / (i+1) lineAlpha = 255 / (i+1)
if self.grid is not False: if self.grid is not False:
lineAlpha *= self.grid/255. * np.clip((0.05 * lengthInPixels / (len(ticks)+1)), 0., 1.) lineAlpha *= self.grid/255. * np.clip((0.05 * lengthInPixels / (len(ticks)+1)), 0., 1.)
elif isinstance(lineAlpha, float):
lineAlpha *= 255
lineAlpha = max(0, int(round(lineAlpha)))
lineAlpha = min(255, int(round(lineAlpha)))
elif isinstance(lineAlpha, int):
if (lineAlpha > 255) or (lineAlpha < 0):
raise ValueError("lineAlpha should be [0..255]")
else:
raise TypeError("Line Alpha should be of type None, float or int")
for v in ticks: for v in ticks:
## determine actual position to draw this tick ## determine actual position to draw this tick