Merge of branch transform by two nodes LPE

(bzr r14320)

1 files changed, 316 insertions, 0 deletions

diff --git a/src/live_effects/lpe-transform_2pts.cpp b/src/live_effects/lpe-transform_2pts.cpp
new file mode 100644
index 000000000..d2c2cfc0e
--- /dev/null
+++ b/src/live_effects/lpe-transform_2pts.cpp
@@ -0,0 +1,316 @@
+/** \file
+ * LPE "Transform through 2 points" implementation
+ */
+
+/*
+ * Authors:
+ *   Jabier Arraiza Cenoz<jabier.arraiza@marker.es>
+ *
+ *
+ * Released under GNU GPL, read the file 'COPYING' for more information
+ */
+
+#include <gtkmm.h>
+
+#include "live_effects/lpe-transform_2pts.h"
+#include "display/curve.h"
+#include <2geom/transforms.h>
+#include <2geom/pathvector.h>
+#include "sp-path.h"
+#include "ui/icon-names.h"
+
+#include <glibmm/i18n.h>
+
+namespace Inkscape {
+namespace LivePathEffect {
+
+LPETransform2Pts::LPETransform2Pts(LivePathEffectObject *lpeobject) :
+    Effect(lpeobject),
+    from_original_width(_("From original width"), _("From original width"), "from_original_width", &wr, this, false,"", INKSCAPE_ICON("on"), INKSCAPE_ICON("off")),
+    start(_("Start"), _("Start point"), "start", &wr, this, "Start point"),
+    end(_("End"), _("End point"), "end", &wr, this, "End point"),
+    first_knot(_("First Knot"), _("First Knot"), "first_knot", &wr, this, 1),
+    last_knot(_("Last Knot"), _("Last Knot"), "last_knot", &wr, this, 1),
+    from_original_width_toggler(false),
+    point_a(Geom::Point()),
+    point_b(Geom::Point()),
+    pathvector(),
+    append_path(false)
+{
+    registerParameter(&start);
+    registerParameter(&end);
+    registerParameter(&first_knot);
+    registerParameter(&last_knot);
+    registerParameter(&from_original_width);
+
+    first_knot.param_make_integer(true);
+    last_knot.param_make_integer(true);
+}
+
+LPETransform2Pts::~LPETransform2Pts()
+{
+}
+
+void
+LPETransform2Pts::doOnApply(SPLPEItem const* lpeitem)
+{
+    using namespace Geom;
+    original_bbox(lpeitem);
+
+    point_a = Point(boundingbox_X.min(), boundingbox_Y.middle());
+    point_b = Point(boundingbox_X.max(), boundingbox_Y.middle());
+    SPLPEItem * splpeitem = const_cast<SPLPEItem *>(lpeitem);
+    SPPath *sp_path = dynamic_cast<SPPath *>(splpeitem);
+    if (sp_path) {
+        pathvector = sp_path->get_original_curve()->get_pathvector();
+    }
+    if(!pathvector.empty()) {
+        point_a = pathvector.initialPoint();
+        point_b = pathvector.finalPoint();
+        size_t nnodes = nodeCount(pathvector);
+        last_knot.param_set_value(nnodes);
+    }
+    start.param_update_default(point_a);
+    start.param_set_default();
+    end.param_update_default(point_b);
+    end.param_set_default();
+}
+
+void
+LPETransform2Pts::doBeforeEffect (SPLPEItem const* lpeitem)
+{
+    using namespace Geom;
+    original_bbox(lpeitem);
+    point_a = Point(boundingbox_X.min(), boundingbox_Y.middle());
+    point_b = Point(boundingbox_X.max(), boundingbox_Y.middle());
+
+    SPLPEItem * splpeitem = const_cast<SPLPEItem *>(lpeitem);
+    SPPath *sp_path = dynamic_cast<SPPath *>(splpeitem);
+    if (sp_path) {
+        pathvector = sp_path->get_original_curve()->get_pathvector();
+    }
+    if(from_original_width_toggler != from_original_width) {
+        from_original_width_toggler = from_original_width;
+        reset();
+    }
+    if(!pathvector.empty() && !from_original_width) {
+        append_path = false;
+        point_a = pointAtNodeIndex(pathvector,(size_t)first_knot-1);
+        point_b = pointAtNodeIndex(pathvector,(size_t)last_knot-1);
+        size_t nnodes = nodeCount(pathvector);
+        first_knot.param_set_range(1, last_knot-1);
+        last_knot.param_set_range(first_knot+1, nnodes);
+        from_original_width.param_setValue(false);
+    } else {
+        first_knot.param_set_value(1);
+        last_knot.param_set_value(2);
+        first_knot.param_set_range(1,1);
+        last_knot.param_set_range(2,2);
+        from_original_width.param_setValue(true);
+        append_path = false;
+    }
+    splpeitem->apply_to_clippath(splpeitem);
+    splpeitem->apply_to_mask(splpeitem);
+}
+
+void
+LPETransform2Pts::updateIndex()
+{
+    SPLPEItem * splpeitem = const_cast<SPLPEItem *>(sp_lpe_item);
+    SPPath *sp_path = dynamic_cast<SPPath *>(splpeitem);
+    if (sp_path) {
+        pathvector = sp_path->get_original_curve()->get_pathvector();
+    }
+    if(!pathvector.empty() && !from_original_width) {
+        point_a = pointAtNodeIndex(pathvector,(size_t)first_knot-1);
+        point_b = pointAtNodeIndex(pathvector,(size_t)last_knot-1);
+        start.param_update_default(point_a);
+        start.param_set_default();
+        end.param_update_default(point_b);
+        end.param_set_default();
+        start.param_update_default(point_a);
+        end.param_update_default(point_b);
+        start.param_set_default();
+        end.param_set_default();
+    }
+}
+//todo migrate to PathVector class?
+size_t
+LPETransform2Pts::nodeCount(Geom::PathVector pathvector) const
+{
+    size_t n = 0;
+    for (Geom::PathVector::iterator it = pathvector.begin(); it != pathvector.end(); ++it) {
+        n += it->size_closed();
+    }
+    return n;
+}
+//todo migrate to PathVector class?
+Geom::Point
+LPETransform2Pts::pointAtNodeIndex(Geom::PathVector pathvector, size_t index) const
+{
+    size_t n = 0;
+    for (Geom::PathVector::iterator pv_it = pathvector.begin(); pv_it != pathvector.end(); ++pv_it) {
+        for (Geom::Path::iterator curve_it = pv_it->begin(); curve_it != pv_it->end_closed(); ++curve_it) {
+            if(index == n){
+                return curve_it->initialPoint();
+            }
+            n++;
+        }
+    }
+    return Geom::Point();
+}
+//todo migrate to PathVector class? Not used
+Geom::Path
+LPETransform2Pts::pathAtNodeIndex(Geom::PathVector pathvector, size_t index) const
+{
+    size_t n = 0;
+    for (Geom::PathVector::iterator pv_it = pathvector.begin(); pv_it != pathvector.end(); ++pv_it) {
+        for (Geom::Path::iterator curve_it = pv_it->begin(); curve_it != pv_it->end_closed(); ++curve_it) {
+            if(index == n){
+                return *pv_it;
+            }
+            n++;
+        }
+    }
+    return Geom::Path();
+}
+
+
+void
+LPETransform2Pts::reset()
+{
+    point_a = Geom::Point(boundingbox_X.min(), boundingbox_Y.middle());
+    point_b = Geom::Point(boundingbox_X.max(), boundingbox_Y.middle());
+    if(!pathvector.empty() && !from_original_width) {
+        size_t nnodes = nodeCount(pathvector);
+        first_knot.param_set_range(1, last_knot-1);
+        last_knot.param_set_range(first_knot+1, nnodes);
+        first_knot.param_set_value(1);
+        last_knot.param_set_value(nnodes);
+        point_a = pathvector.initialPoint();
+        point_b = pathvector.finalPoint();
+    } else {
+        first_knot.param_set_value(1);
+        last_knot.param_set_value(2);
+    }
+    start.param_update_default(point_a);
+    end.param_update_default(point_b);
+    start.param_set_default();
+    end.param_set_default();
+}
+
+Gtk::Widget *LPETransform2Pts::newWidget()
+{
+    // use manage here, because after deletion of Effect object, others might
+    // still be pointing to this widget.
+    Gtk::VBox *vbox = Gtk::manage(new Gtk::VBox(Effect::newWidget()));
+
+    vbox->set_border_width(5);
+    vbox->set_homogeneous(false);
+    vbox->set_spacing(6);
+
+    std::vector<Parameter *>::iterator it = param_vector.begin();
+    Gtk::HBox * button = Gtk::manage(new Gtk::HBox(true,0));
+    while (it != param_vector.end()) {
+        if ((*it)->widget_is_visible) {
+            Parameter *param = *it;
+            Gtk::Widget *widg = dynamic_cast<Gtk::Widget *>(param->param_newWidget());
+            Glib::ustring *tip = param->param_getTooltip();
+            if (param->param_key == "first_knot" || param->param_key == "last_knot") {
+                Inkscape::UI::Widget::Scalar *registered_widget = Gtk::manage(dynamic_cast<Inkscape::UI::Widget::Scalar *>(widg));
+                registered_widget->signal_value_changed().connect(sigc::mem_fun(*this, &LPETransform2Pts::updateIndex));
+                widg = registered_widget;
+                if (widg) {
+                    Gtk::HBox *hbox_scalar = dynamic_cast<Gtk::HBox *>(widg);
+                    std::vector<Gtk::Widget *> child_list = hbox_scalar->get_children();
+                    Gtk::Entry *entry_widget = dynamic_cast<Gtk::Entry *>(child_list[1]);
+                    entry_widget->set_width_chars(3);
+                    vbox->pack_start(*widg, true, true, 2);
+                    if (tip) {
+                        widg->set_tooltip_text(*tip);
+                    } else {
+                        widg->set_tooltip_text("");
+                        widg->set_has_tooltip(false);
+                    }
+                }
+            } else if (param->param_key == "from_original_width") {
+                Glib::ustring * tip = param->param_getTooltip();
+                if (widg) {
+                    button->pack_start(*widg, true, true, 2);
+                    if (tip) {
+                        widg->set_tooltip_text(*tip);
+                    } else {
+                        widg->set_tooltip_text("");
+                        widg->set_has_tooltip(false);
+                    }
+                }
+            } else if (widg) {
+                vbox->pack_start(*widg, true, true, 2);
+                if (tip) {
+                    widg->set_tooltip_text(*tip);
+                } else {
+                    widg->set_tooltip_text("");
+                    widg->set_has_tooltip(false);
+                }
+            }
+        }
+
+        ++it;
+    }
+    Gtk::Button *reset = Gtk::manage(new Gtk::Button(Glib::ustring(_("Reset"))));
+    reset->signal_clicked().connect(sigc::mem_fun(*this, &LPETransform2Pts::reset));
+    button->pack_start(*reset, true, true, 2);
+    vbox->pack_start(*button, true, true, 2);
+    return dynamic_cast<Gtk::Widget *>(vbox);
+}
+
+Geom::Piecewise<Geom::D2<Geom::SBasis> >
+LPETransform2Pts::doEffect_pwd2 (Geom::Piecewise<Geom::D2<Geom::SBasis> > const & pwd2_in)
+{
+    Geom::Piecewise<Geom::D2<Geom::SBasis> > output;
+    double sca = Geom::distance((Geom::Point)start,(Geom::Point)end)/Geom::distance(point_a,point_b);
+    Geom::Ray original(point_a,point_b);
+    Geom::Ray transformed((Geom::Point)start,(Geom::Point)end);
+    double rot = transformed.angle() - original.angle();
+    Geom::Path helper;
+    helper.start(point_a);
+    helper.appendNew<Geom::LineSegment>(point_b);
+    Geom::Affine m;
+    m *= Geom::Scale(sca);
+    m *= Geom::Rotate(rot);
+    helper *= m;
+    m *= Geom::Translate((Geom::Point)start - helper.initialPoint());
+    output.concat(pwd2_in * m);
+
+    return output;
+}
+
+void
+LPETransform2Pts::addCanvasIndicators(SPLPEItem const */*lpeitem*/, std::vector<Geom::PathVector> &hp_vec)
+{
+    using namespace Geom;
+    hp_vec.clear();
+    Geom::Path hp;
+    hp.start((Geom::Point)start);
+    hp.appendNew<Geom::LineSegment>((Geom::Point)end);
+    Geom::PathVector pathv;
+    pathv.push_back(hp);
+    hp_vec.push_back(pathv);
+}
+
+
+/* ######################## */
+
+} //namespace LivePathEffect
+} /* namespace Inkscape */
+
+/*
+  Local Variables:
+  mode:c++
+  c-file-style:"stroustrup"
+  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
+  indent-tabs-mode:nil
+  fill-column:99
+  End:
+*/
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :