xy_to_index
Description:
Converts from X and Y position within a layout to the byte index to the character at that logical position.
If the Y position is not inside the layout, the closest position is chosen (the position will be clamped inside the layout). If the X position
is not within the layout, then the start or the end of the line is chosen as described for
x_to_index. If either the X or Y positions were not inside the layout, then
the function returns false; on an exact hit, it returns true.
Parameters:
| this |
a Layout |
| x |
the X offset (in Pango units) from the left edge of the layout. |
| y |
the Y offset (in Pango units) from the top edge of the layout |
| index_ |
location to store calculated byte index |
| trailing |
location to store a 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:
|
|