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Diffstat (limited to 'src/ui/shape-editor.cpp')
| -rw-r--r-- | src/ui/shape-editor.cpp | 210 |
1 files changed, 210 insertions, 0 deletions
diff --git a/src/ui/shape-editor.cpp b/src/ui/shape-editor.cpp new file mode 100644 index 0000000..fe8e2a7 --- /dev/null +++ b/src/ui/shape-editor.cpp @@ -0,0 +1,210 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/** @file + * Inkscape::ShapeEditor + * This is a container class which contains a knotholder for shapes. + * It is attached to a single item. + *//* + * Authors: see git history + * bulia byak <buliabyak@users.sf.net> + * Krzysztof Kosiński <tweenk.pl@gmail.com> + * + * Copyright (C) 2018 Authors + * Released under GNU GPL v2+, read the file 'COPYING' for more information. + */ + +#include "shape-editor.h" + +#include "desktop.h" +#include "document.h" +#include "live_effects/effect.h" +#include "object/sp-lpe-item.h" +#include "ui/knot/knot-holder.h" + +namespace Inkscape { +namespace UI { + +KnotHolder *createKnotHolder(SPItem *item, SPDesktop *desktop, double edit_rotation, int edit_marker_mode); +KnotHolder *createLPEKnotHolder(SPItem *item, SPDesktop *desktop); + +bool ShapeEditor::_blockSetItem = false; + +ShapeEditor::ShapeEditor(SPDesktop *dt, Geom::Affine edit_transform, double edit_rotation, int edit_marker_mode) + : desktop(dt) + , _edit_transform(edit_transform) + , _edit_rotation(edit_rotation) + , _edit_marker_mode(edit_marker_mode) +{ +} + +ShapeEditor::~ShapeEditor() { + unset_item(); +} + +void ShapeEditor::unset_item(bool keep_knotholder) { + if (this->knotholder) { + Inkscape::XML::Node *old_repr = this->knotholder->repr; + if (old_repr && old_repr == knotholder_listener_attached_for) { + old_repr->removeObserver(*this); + Inkscape::GC::release(old_repr); + knotholder_listener_attached_for = nullptr; + } + + if (!keep_knotholder) { + delete this->knotholder; + this->knotholder = nullptr; + } + } + if (this->lpeknotholder) { + Inkscape::XML::Node *old_repr = this->lpeknotholder->repr; + bool remove = false; + if (old_repr && old_repr == lpeknotholder_listener_attached_for) { + old_repr->removeObserver(*this); + Inkscape::GC::release(old_repr); + remove = true; + } + + if (!keep_knotholder) { + delete this->lpeknotholder; + this->lpeknotholder = nullptr; + } + if (remove) { + lpeknotholder_listener_attached_for = nullptr; + } + } +} + +bool ShapeEditor::has_knotholder() { + return this->knotholder != nullptr || this->lpeknotholder != nullptr; +} + +void ShapeEditor::update_knotholder() { + if (this->knotholder) + this->knotholder->update_knots(); + if (this->lpeknotholder) + this->lpeknotholder->update_knots(); +} + +bool ShapeEditor::has_local_change() { + return (this->knotholder && this->knotholder->local_change != 0) || (this->lpeknotholder && this->lpeknotholder->local_change != 0); +} + +void ShapeEditor::decrement_local_change() { + if (this->knotholder) { + this->knotholder->local_change = FALSE; + } + if (this->lpeknotholder) { + this->lpeknotholder->local_change = FALSE; + } +} + +void ShapeEditor::notifyAttributeChanged(Inkscape::XML::Node&, GQuark, + Inkscape::Util::ptr_shared, + Inkscape::Util::ptr_shared) +{ + bool changed_kh = false; + + if (has_knotholder()) { + changed_kh = !has_local_change(); + decrement_local_change(); + if (changed_kh) { + reset_item(); + } + } +} + + +void ShapeEditor::set_item(SPItem *item) { + if (_blockSetItem) { + return; + } + // this happens (and should only happen) when for an LPEItem having both knotholder and + // nodepath the knotholder is adapted; in this case we don't want to delete the knotholder + // since this freezes the handles + unset_item(true); + + if (item) { + Inkscape::XML::Node *repr; + if (!this->knotholder) { + // only recreate knotholder if none is present + this->knotholder = createKnotHolder(item, desktop, _edit_rotation, _edit_marker_mode); + } + auto lpe = cast<SPLPEItem>(item); + if (!(lpe && + lpe->getCurrentLPE() && + lpe->getCurrentLPE()->isVisible() && + lpe->getCurrentLPE()->providesKnotholder())) + { + delete this->lpeknotholder; + this->lpeknotholder = nullptr; + } + if (!this->lpeknotholder) { + // only recreate knotholder if none is present + this->lpeknotholder = createLPEKnotHolder(item, desktop); + } + if (this->knotholder) { + knotholder->install_modification_watch(); // let knotholder know item's attribute may have changed + this->knotholder->setEditTransform(_edit_transform); + this->knotholder->update_knots(); + // setting new listener + repr = this->knotholder->repr; + if (repr != knotholder_listener_attached_for) { + Inkscape::GC::anchor(repr); + repr->addObserver(*this); + knotholder_listener_attached_for = repr; + } + } + if (this->lpeknotholder) { + this->lpeknotholder->setEditTransform(_edit_transform); + this->lpeknotholder->update_knots(); + // setting new listener + repr = this->lpeknotholder->repr; + if (repr != lpeknotholder_listener_attached_for) { + Inkscape::GC::anchor(repr); + repr->addObserver(*this); + lpeknotholder_listener_attached_for = repr; + } + } + } +} + + +/** FIXME: This thing is only called when the item needs to be updated in response to repr change. + Why not make a reload function in KnotHolder? */ +void ShapeEditor::reset_item() +{ + if (knotholder) { + SPObject *obj = desktop->getDocument()->getObjectByRepr(knotholder_listener_attached_for); /// note that it is not certain that this is an SPItem; it could be a LivePathEffectObject. + set_item(cast<SPItem>(obj)); + } else if (lpeknotholder) { + SPObject *obj = desktop->getDocument()->getObjectByRepr(lpeknotholder_listener_attached_for); /// note that it is not certain that this is an SPItem; it could be a LivePathEffectObject. + set_item(cast<SPItem>(obj)); + } +} + +/** + * Returns true if this ShapeEditor has a knot above which the mouse currently hovers. + */ +bool ShapeEditor::knot_mouseover() const { + if (this->knotholder) { + return knotholder->knot_mouseover(); + } + if (this->lpeknotholder) { + return lpeknotholder->knot_mouseover(); + } + + return false; +} + +} // namespace UI +} // 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 : |