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Diffstat (limited to 'src/canvas-base.c')
| -rw-r--r-- | src/canvas-base.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/src/canvas-base.c b/src/canvas-base.c index afd81b6..8d8b8d1 100644 --- a/src/canvas-base.c +++ b/src/canvas-base.c @@ -599,6 +599,26 @@ ganv_item_i2w_pair(GanvItem* item, double* x1, double* y1, double* x2, double* y *y2 += off_y; } +/** + * ganv_item_w2i: + * @item: A canvas item. + * @x: X coordinate to convert (input/output value). + * @y: Y coordinate to convert (input/output value). + * + * Converts a coordinate pair from world coordinates to item-relative + * coordinates. + **/ +void +ganv_item_w2i(GanvItem* item, double* x, double* y) +{ + double off_x; + double off_y; + ganv_item_i2w_offset(item, &off_x, &off_y); + + *x -= off_x; + *y -= off_y; +} + /* Returns whether the item is an inferior of or is equal to the parent. */ static gboolean is_descendant(GanvItem* item, GanvItem* parent) |