diff options
Diffstat (limited to 'src/gradient-chemistry.cpp')
| -rw-r--r-- | src/gradient-chemistry.cpp | 129 |
1 files changed, 125 insertions, 4 deletions
diff --git a/src/gradient-chemistry.cpp b/src/gradient-chemistry.cpp index 6b1376fb5..ed4e81f0d 100644 --- a/src/gradient-chemistry.cpp +++ b/src/gradient-chemistry.cpp @@ -20,10 +20,19 @@ #include <2geom/transforms.h> #include <2geom/bezier-curve.h> +#include <2geom/crossing.h> +#include <2geom/line.h> +#include <2geom/angle.h> #include "style.h" #include "document-private.h" +#include "document-undo.h" #include "desktop-style.h" +#include "desktop-handles.h" +#include "event-context.h" +#include "selection.h" +#include "verbs.h" +#include <glibmm/i18n.h> #include "sp-gradient-reference.h" #include "sp-gradient-vector.h" @@ -44,6 +53,7 @@ #define noSP_GR_VERBOSE +using Inkscape::DocumentUndo; namespace { @@ -355,10 +365,45 @@ SPGradient *sp_gradient_reset_to_userspace(SPGradient *gr, SPItem *item) g_free(c); } } else if (SP_IS_LINEARGRADIENT(gr)) { - sp_repr_set_svg_double(repr, "x1", (center - Geom::Point(width/2, 0))[Geom::X]); - sp_repr_set_svg_double(repr, "y1", (center - Geom::Point(width/2, 0))[Geom::Y]); - sp_repr_set_svg_double(repr, "x2", (center + Geom::Point(width/2, 0))[Geom::X]); - sp_repr_set_svg_double(repr, "y2", (center + Geom::Point(width/2, 0))[Geom::Y]); + + // Assume horizontal gradient by default (as per SVG 1.1) + Geom::Point pStart = center - Geom::Point(width/2, 0); + Geom::Point pEnd = center + Geom::Point(width/2, 0); + + // Get the preferred gradient angle from prefs + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + double angle = prefs->getDouble("/dialogs/gradienteditor/angle", 0.0); + + if (angle != 0.0) { + + Geom::Line grl(center, Geom::deg_to_rad(angle)); + Geom::LineSegment bbl1(bbox->corner(0), bbox->corner(1)); + Geom::LineSegment bbl2(bbox->corner(1), bbox->corner(2)); + Geom::LineSegment bbl3(bbox->corner(2), bbox->corner(3)); + Geom::LineSegment bbl4(bbox->corner(3), bbox->corner(0)); + + // Find where our gradient line intersects the bounding box. + if (intersection(bbl1, grl)) { + pStart = bbl1.pointAt((*intersection(bbl1, grl)).ta); + pEnd = bbl3.pointAt((*intersection(bbl3, grl)).ta); + if (intersection(bbl1, grl.ray(grl.angle()))) { + std::swap(pStart, pEnd); + } + } else if (intersection(bbl2, grl)) { + pStart = bbl2.pointAt((*intersection(bbl2, grl)).ta); + pEnd = bbl4.pointAt((*intersection(bbl4, grl)).ta); + if (intersection(bbl2, grl.ray(grl.angle()))) { + std::swap(pStart, pEnd); + } + } + + } + + sp_repr_set_svg_double(repr, "x1", pStart[Geom::X]); + sp_repr_set_svg_double(repr, "y1", pStart[Geom::Y]); + sp_repr_set_svg_double(repr, "x2", pEnd[Geom::X]); + sp_repr_set_svg_double(repr, "y2", pEnd[Geom::Y]); + } else { // Mesh // THIS IS BEING CALLED TWICE WHENEVER A NEW GRADIENT IS CREATED, WRITING HERE CAUSES PROBLEMS @@ -914,6 +959,44 @@ void sp_item_gradient_reverse_vector(SPItem *item, Inkscape::PaintTarget fill_or g_slist_free (child_objects); } +void sp_item_gradient_invert_vector_color(SPItem *item, Inkscape::PaintTarget fill_or_stroke) +{ +#ifdef SP_GR_VERBOSE + g_message("sp_item_gradient_invert_vector_color(%p, %d)", item, fill_or_stroke); +#endif + SPGradient *gradient = getGradient(item, fill_or_stroke); + if (!gradient || !SP_IS_GRADIENT(gradient)) + return; + + SPGradient *vector = gradient->getVector(); + if (!vector) // orphan! + return; + + vector = sp_gradient_fork_vector_if_necessary (vector); + if ( gradient != vector && gradient->ref->getObject() != vector ) { + sp_gradient_repr_set_link(gradient->getRepr(), vector); + } + + for ( SPObject *child = vector->firstChild(); child; child = child->getNext()) { + if (SP_IS_STOP(child)) { + guint32 color = sp_stop_get_rgba32(SP_STOP(child)); + //g_message("Stop color %d", color); + gchar c[64]; + sp_svg_write_color (c, sizeof(c), + SP_RGBA32_U_COMPOSE( + (255 - SP_RGBA32_R_U(color)), + (255 - SP_RGBA32_G_U(color)), + (255 - SP_RGBA32_B_U(color)), + SP_RGBA32_A_U(color) + ) + ); + SPCSSAttr *css = sp_repr_css_attr_new (); + sp_repr_css_set_property (css, "stop-color", c); + sp_repr_css_change(child->getRepr(), css, "style"); + sp_repr_css_attr_unref (css); + } + } +} /** Set the position of point point_type of the gradient applied to item (either fill_or_stroke) to @@ -1469,6 +1552,44 @@ SPGradient *sp_gradient_vector_for_object( SPDocument *const doc, SPDesktop *con return sp_document_default_gradient_vector( doc, color, singleStop ); } +void sp_gradient_invert_selected_gradients(SPDesktop *desktop, Inkscape::PaintTarget fill_or_stroke) +{ + Inkscape::Selection *selection = sp_desktop_selection(desktop); + + for (GSList const* i = selection->itemList(); i != NULL; i = i->next) { + sp_item_gradient_invert_vector_color(SP_ITEM(i->data), fill_or_stroke); + } + + // we did an undoable action + DocumentUndo::done(sp_desktop_document(desktop), SP_VERB_CONTEXT_GRADIENT, + _("Invert gradient colors")); +} + +void sp_gradient_reverse_selected_gradients(SPDesktop *desktop) +{ + Inkscape::Selection *selection = sp_desktop_selection(desktop); + SPEventContext *ev = sp_desktop_event_context(desktop); + + if (!ev) { + return; + } + + GrDrag *drag = ev->get_drag(); + + // First try selected dragger + if (drag && drag->selected) { + drag->selected_reverse_vector(); + } else { // If no drag or no dragger selected, act on selection (both fill and stroke gradients) + for (GSList const* i = selection->itemList(); i != NULL; i = i->next) { + sp_item_gradient_reverse_vector(SP_ITEM(i->data), Inkscape::FOR_FILL); + sp_item_gradient_reverse_vector(SP_ITEM(i->data), Inkscape::FOR_STROKE); + } + } + + // we did an undoable action + DocumentUndo::done(sp_desktop_document(desktop), SP_VERB_CONTEXT_GRADIENT, + _("Reverse gradient")); +} /* Local Variables: |