Feature request: anchor relative to baseline about adafruit_circuitpython_display_text HOT 5 CLOSED

I’ve not, yet. Been on other projects. Looking forward to using it on future stuff.

from adafruit_circuitpython_display_text.

Fully agreed that the baseline is a major consternation but was based on the (historical?) version of label. It uses the height of an ‘M’ to define the baseline using this code (line 199):

y_offset = int((self._font.get_glyph(ord("M")).height) / 2)

The baseline position is actually defined in the BDF font specification but is currently ignored in the current code.

On a related note, the ascender/descender height should be included in the BDF file but is not currently utilized. Instead, a few characters are checked to test the ascender/descender height. These dimensions is used for the background sizing along with tight_padding.

Any changes to the baseline should be propagated to label and bitmap_label for consistency.

One complexity with baseline positioning is that two ways are currently available to set the position, either (x,y) or by anchor_position.

If we can think of a way to consolidate this perhaps this would be more well-defined (but maybe more confusing?).

One proposal:

1. Get rid of anchored_position and always use x,y to set the position (baseline or the anchor point).
2. If anchor_point value is (None, None) then use the standard baseline values. If one of the anchor_point values is None then just use baseline for that axis. If both are set, the use x,y like anchored_position is currently used.

Also, the Open Book project @joeycastillo may have some guidance since that project formats a lot of text.

from adafruit_circuitpython_display_text.

New features for font ascent and descent were added in this recent PR: #110

from adafruit_circuitpython_display_text.

@PaintYourDragon have you test the new feature that we include in the library that allows different fonts to align to the baseline as you describe in this issue. Let us know if you have more ideas regarding this. Thanks.

from adafruit_circuitpython_display_text.

#115 and #134 have added this feature for x,y placement, and anchored_point.

It's much easier now to align different sized fonts as shown in the images above using thew new features. Closing this issue for now.

from adafruit_circuitpython_display_text.