diff options
Diffstat (limited to 'src/display/sp-canvas.cpp')
| -rw-r--r-- | src/display/sp-canvas.cpp | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/src/display/sp-canvas.cpp b/src/display/sp-canvas.cpp index 9cc9e51a2..61602e880 100644 --- a/src/display/sp-canvas.cpp +++ b/src/display/sp-canvas.cpp @@ -1937,10 +1937,16 @@ double start_angle = 0; bool started = false; bool rotated = false; -void SPCanvas::scrollTo(double cx, double cy, unsigned int clear, bool is_scrolling) +/** + * Scroll screen to point 'c'. 'c' is measured in screen pixels. + */ +void SPCanvas::scrollTo( Geom::Point const &c, unsigned int clear, bool is_scrolling) { GtkAllocation allocation; + double cx = c[Geom::X]; + double cy = c[Geom::Y]; + int ix = (int) round(cx); // ix and iy are the new canvas coordinates (integer screen pixels) int iy = (int) round(cy); // cx might be negative, so (int)(cx + 0.5) will not do! int dx = ix - _x0; // dx and dy specify the displacement (scroll) of the |