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-rw-r--r--src/ui/tools/box3d-tool.cpp570
1 files changed, 570 insertions, 0 deletions
diff --git a/src/ui/tools/box3d-tool.cpp b/src/ui/tools/box3d-tool.cpp
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+++ b/src/ui/tools/box3d-tool.cpp
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+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * 3D box drawing context
+ *
+ * Author:
+ * Lauris Kaplinski <lauris@kaplinski.com>
+ * bulia byak <buliabyak@users.sf.net>
+ * Jon A. Cruz <jon@joncruz.org>
+ * Abhishek Sharma
+ *
+ * Copyright (C) 2007 Maximilian Albert <Anhalter42@gmx.de>
+ * Copyright (C) 2006 Johan Engelen <johan@shouraizou.nl>
+ * Copyright (C) 2000-2005 authors
+ * Copyright (C) 2000-2001 Ximian, Inc.
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include <gdk/gdkkeysyms.h>
+#include <glibmm/i18n.h>
+
+
+#include "context-fns.h"
+#include "desktop-style.h"
+#include "desktop.h"
+#include "document-undo.h"
+#include "document.h"
+#include "message-context.h"
+#include "perspective-line.h"
+#include "selection-chemistry.h"
+#include "selection.h"
+
+#include "include/macros.h"
+
+#include "object/box3d-side.h"
+#include "object/box3d.h"
+#include "object/sp-defs.h"
+#include "object/sp-namedview.h"
+
+#include "ui/icon-names.h"
+#include "ui/shape-editor.h"
+#include "ui/tools/box3d-tool.h"
+
+using Inkscape::DocumentUndo;
+
+namespace Inkscape {
+namespace UI {
+namespace Tools {
+
+Box3dTool::Box3dTool(SPDesktop *desktop)
+ : ToolBase(desktop, "/tools/shapes/3dbox", "box.svg")
+ , _vpdrag(nullptr)
+ , box3d(nullptr)
+ , ctrl_dragged(false)
+ , extruded(false)
+{
+ this->shape_editor = new ShapeEditor(_desktop);
+
+ SPItem *item = desktop->getSelection()->singleItem();
+ if (item) {
+ this->shape_editor->set_item(item);
+ }
+
+ this->sel_changed_connection.disconnect();
+ this->sel_changed_connection = desktop->getSelection()->connectChanged(
+ sigc::mem_fun(*this, &Box3dTool::selection_changed)
+ );
+
+ this->_vpdrag = new Box3D::VPDrag(desktop->getDocument());
+
+ Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+
+ if (prefs->getBool("/tools/shapes/selcue")) {
+ this->enableSelectionCue();
+ }
+
+ if (prefs->getBool("/tools/shapes/gradientdrag")) {
+ this->enableGrDrag();
+ }
+}
+
+Box3dTool::~Box3dTool() {
+ ungrabCanvasEvents();
+ this->finishItem();
+ this->sel_changed_connection.disconnect();
+
+ this->enableGrDrag(false);
+
+ delete (this->_vpdrag);
+ this->_vpdrag = nullptr;
+
+ delete this->shape_editor;
+ this->shape_editor = nullptr;
+}
+
+/**
+ * Callback that processes the "changed" signal on the selection;
+ * destroys old and creates new knotholder.
+ */
+void Box3dTool::selection_changed(Inkscape::Selection* selection) {
+ this->shape_editor->unset_item();
+ this->shape_editor->set_item(selection->singleItem());
+
+ if (selection->perspList().size() == 1) {
+ // selecting a single box changes the current perspective
+ _desktop->doc()->setCurrentPersp3D(selection->perspList().front());
+ }
+}
+
+/* Create a default perspective in document defs if none is present (which can happen, among other
+ * circumstances, after 'vacuum defs' or when a pre-0.46 file is opened).
+ */
+static void sp_box3d_context_ensure_persp_in_defs(SPDocument *document)
+{
+ auto defs = document->getDefs();
+
+ bool has_persp = false;
+ for (auto &child : defs->children) {
+ if (is<Persp3D>(&child)) {
+ has_persp = true;
+ break;
+ }
+ }
+
+ if (!has_persp) {
+ document->setCurrentPersp3D(Persp3D::create_xml_element (document));
+ }
+}
+
+bool Box3dTool::item_handler(SPItem* item, GdkEvent* event) {
+ gint ret = FALSE;
+
+ switch (event->type) {
+ case GDK_BUTTON_PRESS:
+ if ( event->button.button == 1) {
+ this->setup_for_drag_start(event);
+ //ret = TRUE;
+ }
+ break;
+ // motion and release are always on root (why?)
+ default:
+ break;
+ }
+
+// if (((ToolBaseClass *) sp_box3d_context_parent_class)->item_handler) {
+// ret = ((ToolBaseClass *) sp_box3d_context_parent_class)->item_handler(event_context, item, event);
+// }
+ // CPPIFY: ret is always overwritten...
+ ret = ToolBase::item_handler(item, event);
+
+ return ret;
+}
+
+bool Box3dTool::root_handler(GdkEvent* event) {
+ static bool dragging;
+
+ SPDocument *document = _desktop->getDocument();
+ auto const y_dir = _desktop->yaxisdir();
+ Inkscape::Selection *selection = _desktop->getSelection();
+ Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+ int const snaps = prefs->getInt("/options/rotationsnapsperpi/value", 12);
+
+ Persp3D *cur_persp = document->getCurrentPersp3D();
+
+ this->tolerance = prefs->getIntLimited("/options/dragtolerance/value", 0, 0, 100);
+
+ gint ret = FALSE;
+ switch (event->type) {
+ case GDK_BUTTON_PRESS:
+ if ( event->button.button == 1) {
+ Geom::Point const button_w(event->button.x, event->button.y);
+ Geom::Point button_dt(_desktop->w2d(button_w));
+
+ // save drag origin
+ this->xp = (gint) button_w[Geom::X];
+ this->yp = (gint) button_w[Geom::Y];
+ this->within_tolerance = true;
+
+ // remember clicked box3d, *not* disregarding groups (since a 3D box is a group), honoring Alt
+ this->item_to_select = sp_event_context_find_item (_desktop, button_w, event->button.state & GDK_MOD1_MASK, event->button.state & GDK_CONTROL_MASK);
+
+ dragging = true;
+
+ SnapManager &m = _desktop->namedview->snap_manager;
+ m.setup(_desktop, true, this->box3d);
+ m.freeSnapReturnByRef(button_dt, Inkscape::SNAPSOURCE_NODE_HANDLE);
+ m.unSetup();
+ this->center = button_dt;
+
+ this->drag_origin = button_dt;
+ this->drag_ptB = button_dt;
+ this->drag_ptC = button_dt;
+
+ // This can happen after saving when the last remaining perspective was purged and must be recreated.
+ if (!cur_persp) {
+ sp_box3d_context_ensure_persp_in_defs(document);
+ cur_persp = document->getCurrentPersp3D();
+ }
+
+ /* Projective preimages of clicked point under current perspective */
+ this->drag_origin_proj = cur_persp->perspective_impl->tmat.preimage (button_dt, 0, Proj::Z);
+ this->drag_ptB_proj = this->drag_origin_proj;
+ this->drag_ptC_proj = this->drag_origin_proj;
+ this->drag_ptC_proj.normalize();
+ this->drag_ptC_proj[Proj::Z] = 0.25;
+
+ grabCanvasEvents();
+ ret = TRUE;
+ }
+ break;
+
+ case GDK_MOTION_NOTIFY:
+ if (dragging && ( event->motion.state & GDK_BUTTON1_MASK )) {
+ if (!cur_persp) {
+ // Can happen if perspective is deleted while dragging, e.g. on document closure.
+ ret = true;
+ break;
+ }
+ if ( this->within_tolerance
+ && ( abs( (gint) event->motion.x - this->xp ) < this->tolerance )
+ && ( abs( (gint) event->motion.y - this->yp ) < this->tolerance ) ) {
+ break; // do not drag if we're within tolerance from origin
+ }
+ // Once the user has moved farther than tolerance from the original location
+ // (indicating they intend to draw, not click), then always process the
+ // motion notify coordinates as given (no snapping back to origin)
+ this->within_tolerance = false;
+
+ Geom::Point const motion_w(event->motion.x,
+ event->motion.y);
+ Geom::Point motion_dt(_desktop->w2d(motion_w));
+
+ SnapManager &m = _desktop->namedview->snap_manager;
+ m.setup(_desktop, true, this->box3d);
+ m.freeSnapReturnByRef(motion_dt, Inkscape::SNAPSOURCE_NODE_HANDLE);
+ this->ctrl_dragged = event->motion.state & GDK_CONTROL_MASK;
+
+ if ((event->motion.state & GDK_SHIFT_MASK) && !this->extruded && this->box3d) {
+ // once shift is pressed, set this->extruded
+ this->extruded = true;
+ }
+
+ if (!this->extruded) {
+ this->drag_ptB = motion_dt;
+ this->drag_ptC = motion_dt;
+
+ this->drag_ptB_proj = cur_persp->perspective_impl->tmat.preimage (motion_dt, 0, Proj::Z);
+ this->drag_ptC_proj = this->drag_ptB_proj;
+ this->drag_ptC_proj.normalize();
+ this->drag_ptC_proj[Proj::Z] = 0.25;
+ } else {
+ // Without Ctrl, motion of the extruded corner is constrained to the
+ // perspective line from drag_ptB to vanishing point Y.
+ if (!this->ctrl_dragged) {
+ /* snapping */
+ Box3D::PerspectiveLine pline (this->drag_ptB, Proj::Z, document->getCurrentPersp3D());
+ this->drag_ptC = pline.closest_to (motion_dt);
+
+ this->drag_ptB_proj.normalize();
+ this->drag_ptC_proj = cur_persp->perspective_impl->tmat.preimage (this->drag_ptC, this->drag_ptB_proj[Proj::X], Proj::X);
+ } else {
+ this->drag_ptC = motion_dt;
+
+ this->drag_ptB_proj.normalize();
+ this->drag_ptC_proj = cur_persp->perspective_impl->tmat.preimage (motion_dt, this->drag_ptB_proj[Proj::X], Proj::X);
+ }
+
+ m.freeSnapReturnByRef(this->drag_ptC, Inkscape::SNAPSOURCE_NODE_HANDLE);
+ }
+
+ m.unSetup();
+
+ this->drag(event->motion.state);
+
+ ret = TRUE;
+ } else if (!this->sp_event_context_knot_mouseover()) {
+ SnapManager &m = _desktop->namedview->snap_manager;
+ m.setup(_desktop);
+
+ Geom::Point const motion_w(event->motion.x, event->motion.y);
+ Geom::Point motion_dt(_desktop->w2d(motion_w));
+ m.preSnap(Inkscape::SnapCandidatePoint(motion_dt, Inkscape::SNAPSOURCE_NODE_HANDLE));
+ m.unSetup();
+ }
+ break;
+
+ case GDK_BUTTON_RELEASE:
+ this->xp = this->yp = 0;
+
+ if (event->button.button == 1) {
+ dragging = false;
+ this->discard_delayed_snap_event();
+
+ if (!this->within_tolerance) {
+ // we've been dragging (or switched tools if !box3d), finish the box
+ if (this->box3d) {
+ _desktop->getSelection()->set(this->box3d); // Updating the selection will send signals to the box3d-toolbar ...
+ }
+ this->finishItem(); // .. but finishItem() will be called from the deconstructor too and shall NOT fire such signals!
+ } else if (this->item_to_select) {
+ // no dragging, select clicked box3d if any
+ if (event->button.state & GDK_SHIFT_MASK) {
+ selection->toggle(this->item_to_select);
+ } else {
+ selection->set(this->item_to_select);
+ }
+ } else {
+ // click in an empty space
+ selection->clear();
+ }
+
+ this->item_to_select = nullptr;
+ ret = TRUE;
+ ungrabCanvasEvents();
+ }
+ break;
+
+ case GDK_KEY_PRESS:
+ switch (get_latin_keyval (&event->key)) {
+ case GDK_KEY_Up:
+ case GDK_KEY_Down:
+ case GDK_KEY_KP_Up:
+ case GDK_KEY_KP_Down:
+ // prevent the zoom field from activation
+ if (!MOD__CTRL_ONLY(event))
+ ret = TRUE;
+ break;
+
+ case GDK_KEY_bracketright:
+ document->getCurrentPersp3D()->rotate_VP (Proj::X, 180 / snaps * y_dir, MOD__ALT(event));
+ DocumentUndo::done(document, _("Change perspective (angle of PLs)"), INKSCAPE_ICON("draw-cuboid"));
+ ret = true;
+ break;
+
+ case GDK_KEY_bracketleft:
+ document->getCurrentPersp3D()->rotate_VP (Proj::X, -180 / snaps * y_dir, MOD__ALT(event));
+ DocumentUndo::done(document, _("Change perspective (angle of PLs)"), INKSCAPE_ICON("draw-cuboid"));
+ ret = true;
+ break;
+
+ case GDK_KEY_parenright:
+ document->getCurrentPersp3D()->rotate_VP (Proj::Y, 180 / snaps * y_dir, MOD__ALT(event));
+ DocumentUndo::done(document, _("Change perspective (angle of PLs)"), INKSCAPE_ICON("draw-cuboid"));
+ ret = true;
+ break;
+
+ case GDK_KEY_parenleft:
+ document->getCurrentPersp3D()->rotate_VP (Proj::Y, -180 / snaps * y_dir, MOD__ALT(event));
+ DocumentUndo::done(document, _("Change perspective (angle of PLs)"), INKSCAPE_ICON("draw-cuboid"));
+ ret = true;
+ break;
+
+ case GDK_KEY_braceright:
+ document->getCurrentPersp3D()->rotate_VP (Proj::Z, 180 / snaps * y_dir, MOD__ALT(event));
+ DocumentUndo::done(document, _("Change perspective (angle of PLs)"), INKSCAPE_ICON("draw-cuboid"));
+ ret = true;
+ break;
+
+ case GDK_KEY_braceleft:
+ document->getCurrentPersp3D()->rotate_VP (Proj::Z, -180 / snaps * y_dir, MOD__ALT(event));
+ DocumentUndo::done(document, _("Change perspective (angle of PLs)"), INKSCAPE_ICON("draw-cuboid"));
+ ret = true;
+ break;
+
+ case GDK_KEY_g:
+ case GDK_KEY_G:
+ if (MOD__SHIFT_ONLY(event)) {
+ _desktop->getSelection()->toGuides();
+ ret = true;
+ }
+ break;
+
+ case GDK_KEY_p:
+ case GDK_KEY_P:
+ if (MOD__SHIFT_ONLY(event)) {
+ if (document->getCurrentPersp3D()) {
+ document->getCurrentPersp3D()->print_debugging_info();
+ }
+ ret = true;
+ }
+ break;
+
+ case GDK_KEY_x:
+ case GDK_KEY_X:
+ if (MOD__ALT_ONLY(event)) {
+ _desktop->setToolboxFocusTo("box3d-angle-x");
+ ret = TRUE;
+ }
+ if (MOD__SHIFT_ONLY(event)) {
+ Persp3D::toggle_VPs(selection->perspList(), Proj::X);
+ this->_vpdrag->updateLines(); // FIXME: Shouldn't this be done automatically?
+ ret = true;
+ }
+ break;
+
+ case GDK_KEY_y:
+ case GDK_KEY_Y:
+ if (MOD__SHIFT_ONLY(event)) {
+ Persp3D::toggle_VPs(selection->perspList(), Proj::Y);
+ this->_vpdrag->updateLines(); // FIXME: Shouldn't this be done automatically?
+ ret = true;
+ }
+ break;
+
+ case GDK_KEY_z:
+ case GDK_KEY_Z:
+ if (MOD__SHIFT_ONLY(event)) {
+ Persp3D::toggle_VPs(selection->perspList(), Proj::Z);
+ this->_vpdrag->updateLines(); // FIXME: Shouldn't this be done automatically?
+ ret = true;
+ }
+ break;
+
+ case GDK_KEY_Escape:
+ _desktop->getSelection()->clear();
+ //TODO: make dragging escapable by Esc
+ break;
+
+ case GDK_KEY_space:
+ if (dragging) {
+ ungrabCanvasEvents();
+ dragging = false;
+ this->discard_delayed_snap_event();
+ if (!this->within_tolerance) {
+ // we've been dragging (or switched tools if !box3d), finish the box
+ if (this->box3d) {
+ _desktop->getSelection()->set(this->box3d); // Updating the selection will send signals to the box3d-toolbar ...
+ }
+ this->finishItem(); // .. but finishItem() will be called from the deconstructor too and shall NOT fire such signals!
+ }
+ // do not return true, so that space would work switching to selector
+ }
+ break;
+
+ case GDK_KEY_Delete:
+ case GDK_KEY_KP_Delete:
+ case GDK_KEY_BackSpace:
+ ret = this->deleteSelectedDrag(MOD__CTRL_ONLY(event));
+ break;
+
+ default:
+ break;
+ }
+ break;
+
+ default:
+ break;
+ }
+
+ if (!ret) {
+ ret = ToolBase::root_handler(event);
+ }
+
+ return ret;
+}
+
+void Box3dTool::drag(guint /*state*/) {
+ if (!this->box3d) {
+ if (Inkscape::have_viable_layer(_desktop, defaultMessageContext()) == false) {
+ return;
+ }
+
+ // Create object
+ SPBox3D *box3d = SPBox3D::createBox3D(currentLayer());
+
+ // Set style
+ _desktop->applyCurrentOrToolStyle(box3d, "/tools/shapes/3dbox", false);
+
+ this->box3d = box3d;
+
+ // TODO: Incorporate this in box3d-side.cpp!
+ for (int i = 0; i < 6; ++i) {
+ Box3DSide *side = Box3DSide::createBox3DSide(box3d);
+
+ guint desc = Box3D::int_to_face(i);
+
+ Box3D::Axis plane = (Box3D::Axis) (desc & 0x7);
+ plane = (Box3D::is_plane(plane) ? plane : Box3D::orth_plane_or_axis(plane));
+ side->dir1 = Box3D::extract_first_axis_direction(plane);
+ side->dir2 = Box3D::extract_second_axis_direction(plane);
+ side->front_or_rear = (Box3D::FrontOrRear) (desc & 0x8);
+
+ // Set style
+ Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+
+ Glib::ustring descr = "/desktop/";
+ descr += side->axes_string();
+ descr += "/style";
+
+ Glib::ustring cur_style = prefs->getString(descr);
+
+ bool use_current = prefs->getBool("/tools/shapes/3dbox/usecurrent", false);
+
+ if (use_current && !cur_style.empty()) {
+ // use last used style
+ side->setAttribute("style", cur_style);
+ } else {
+ // use default style
+ Glib::ustring tool_path = Glib::ustring::compose("/tools/shapes/3dbox/%1",
+ side->axes_string());
+ _desktop->applyCurrentOrToolStyle(side, tool_path, false);
+ }
+
+ side->updateRepr(); // calls Box3DSide::write() and updates, e.g., the axes string description
+ }
+
+ this->box3d->set_z_orders();
+ this->box3d->updateRepr();
+
+ // TODO: It would be nice to show the VPs during dragging, but since there is no selection
+ // at this point (only after finishing the box), we must do this "manually"
+ /* this._vpdrag->updateDraggers(); */
+ }
+
+ g_assert(this->box3d);
+
+ this->box3d->orig_corner0 = this->drag_origin_proj;
+ this->box3d->orig_corner7 = this->drag_ptC_proj;
+
+ this->box3d->check_for_swapped_coords();
+
+ /* we need to call this from here (instead of from SPBox3D::position_set(), for example)
+ because z-order setting must not interfere with display updates during undo/redo */
+ this->box3d->set_z_orders ();
+
+ this->box3d->position_set();
+
+ // status text
+ this->message_context->setF(Inkscape::NORMAL_MESSAGE, "%s", _("<b>3D Box</b>; with <b>Shift</b> to extrude along the Z axis"));
+}
+
+void Box3dTool::finishItem() {
+ this->message_context->clear();
+ this->ctrl_dragged = false;
+ this->extruded = false;
+
+ if (this->box3d != nullptr) {
+ SPDocument *doc = _desktop->getDocument();
+
+ if (!doc || !doc->getCurrentPersp3D()) {
+ return;
+ }
+
+ this->box3d->orig_corner0 = this->drag_origin_proj;
+ this->box3d->orig_corner7 = this->drag_ptC_proj;
+
+ this->box3d->updateRepr();
+
+ this->box3d->relabel_corners();
+
+ DocumentUndo::done(_desktop->getDocument(), _("Create 3D box"), INKSCAPE_ICON("draw-cuboid"));
+
+ this->box3d = nullptr;
+ }
+}
+
+}
+}
+}
+
+/*
+ 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:fileencoding=utf-8:textwidth=99 :