, Fill (parent)
, _outline_what ((What) (LEFT | RIGHT | TOP | BOTTOM))
{
-
}
Rectangle::Rectangle (Group* parent, Rect const & rect)
}
void
-Rectangle::render (Rect const & /*area*/, Cairo::RefPtr<Cairo::Context> context) const
+Rectangle::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) const
{
- /* Cairo goes a little (!) wrong when asked to fill/stroke rectangles that
- * extend way beyond the surface boundaries. To avoid this issue,
- * clamp what we are drawing using the absolute end of the visible
- * canvas, converting to item-space coordinates, of course.
- */
+ Rect self = item_to_window (_rect);
+ boost::optional<Rect> r = self.intersection (area);
- Rect plot = _rect;
- Rect visible = _canvas->visible_area();
- Duple visible_end = canvas_to_item (Duple (visible.x1, visible.y1));
+ if (!r) {
+ std::cerr << whatami() << '/' << name << " not covered by render area! ... " << self << " vs. " << area << std::endl;
+ return;
+ }
- plot.x1 = min (plot.x1, visible_end.x);
- plot.y1 = min (plot.y1, visible_end.y);
+ Rect draw = r.get ();
if (_fill) {
- setup_fill_context (context);
- cerr << "Fill rect: " << plot << endl;
- context->rectangle (plot.x0, plot.y0, plot.width(), plot.height());
-
- if (!_outline) {
- context->fill ();
+ if (_stops.empty()) {
+ setup_fill_context (context);
} else {
-
- /* special/common case: outline the entire rectangle is
- * requested, so just use the same path for the fill
- * and stroke.
- */
-
- if (_outline_what == What (LEFT|RIGHT|BOTTOM|TOP)) {
- context->fill_preserve();
- setup_outline_context (context);
- context->stroke ();
- } else {
- context->fill ();
- }
+ setup_gradient_context (context, self, Duple (draw.x0, draw.y0));
}
- }
+ context->rectangle (draw.x0, draw.y0, draw.width(), draw.height());
+ context->fill ();
+ }
if (_outline) {
-
+
setup_outline_context (context);
if (_outline_what == What (LEFT|RIGHT|BOTTOM|TOP)) {
-
- /* if we filled and use full outline, we are already
- * done. otherwise, draw the frame here.
- */
-
- if (!_fill) {
- context->rectangle (plot.x0, plot.y0, plot.width(), plot.height());
- context->stroke ();
- }
+ context->rectangle (self.x0 + 0.5, self.y0 + 0.5, self.width(), self.height());
+
} else {
+
+ context->set_line_cap (Cairo::LINE_CAP_SQUARE);
+ /* see the cairo FAQ on single pixel lines to see why we do
+ * this expansion of the perimeter.
+ */
+
if (_outline_what & LEFT) {
- context->move_to (plot.x0, plot.y0);
- context->line_to (plot.x0, plot.y1);
+ /* vertical line: move x-coordinate by 0.5 pixels */
+ context->move_to (self.x0 + 0.5, self.y0);
+ context->line_to (self.x0 + 0.5, self.y1);
}
if (_outline_what & BOTTOM) {
- context->move_to (plot.x0, plot.y1);
- context->line_to (plot.x1, plot.y1);
+ /* horizontal line: move y-coordinate by 0.5 pixels */
+ context->move_to (self.x0, self.y1 - 0.5);
+ context->line_to (self.x1, self.y1 - 0.5);
}
if (_outline_what & RIGHT) {
- context->move_to (plot.x1, plot.y0);
- context->line_to (plot.x1, plot.y1);
+ /* vertical line: move x-coordinate by 0.5 pixels */
+ context->move_to (self.x1 - 0.5, self.y0);
+ context->line_to (self.x1 - 0.5, self.y1);
}
if (_outline_what & TOP) {
- context->move_to (plot.x0, plot.y0);
- context->line_to (plot.x1, plot.y0);
+ /* horizontal line: move y-coordinate by 0.5 pixels */
+ context->move_to (self.x0, self.y0 + 0.5);
+ context->line_to (self.x1, self.y0 + 0.5);
}
-
- context->stroke ();
}
+
+ context->stroke ();
}
}
void
Rectangle::compute_bounding_box () const
{
- Rect r = _rect.fix ();
- _bounding_box = boost::optional<Rect> (r.expand (_outline_width / 2));
-
+ if (!_rect.empty()) {
+ Rect r = _rect.fix ();
+
+ /* our outlines are always inside our coordinates, but we have
+ * to ensure that our bounding box fully *contains* the
+ * rectangle
+ *
+ * XXX: or something like that, waffle.
+ *
+ */
+ _bounding_box = r.expand (1.0);
+ }
+
_bounding_box_dirty = false;
}