LayoutLine.xToIndex

bool xToIndex(int xPos, out int index, out int trailing)

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

`xPos`	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 x_pos was outside the line, true if inside