x_to_index
Description:
Converts from x offset to the byte index of the corresponding character within the text of the layout.
If x_pos is outside the line, index_ and trailing will point to the very first or very last position in
the line. This determination is based on the resolved direction of the paragraph; for example, if the resolved direction is right-to-left, then
an X position to the right of the line (after it) results in 0 being stored in index_ and trailing. An X position to
the left of the line results in index_ pointing to the (logical) last grapheme in the line and trailing being set to
the number of characters in that grapheme. The reverse is true for a left-to-right line.
Parameters:
| this |
a `PangoLayoutLine` |
| x_pos |
the X offset (in Pango units) from the left edge of the line. |
| index_ |
location to store calculated byte index for the grapheme in which the user clicked |
| trailing |
location to store an integer indicating where in the grapheme the user clicked. It will either be zero, or the number of characters in the grapheme. 0 represents the leading edge of the grapheme. |
Returns:
|
false if |