Adding upstream version 1.2.2.upstream/1.2.2upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1146 insertions, 0 deletions

diff --git a/src/ui/tools/select-tool.cpp b/src/ui/tools/select-tool.cpp
new file mode 100644
index 0000000..0e80c3d
--- /dev/null
+++ b/src/ui/tools/select-tool.cpp
@@ -0,0 +1,1146 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Selection and transformation context
+ *
+ * Authors:
+ *   Lauris Kaplinski <lauris@kaplinski.com>
+ *   bulia byak <buliabyak@users.sf.net>
+ *   Abhishek Sharma
+ *   Jon A. Cruz <jon@joncruz.org>
+ *
+ * Copyright (C) 2010      authors
+ * Copyright (C) 2006      Johan Engelen <johan@shouraizou.nl>
+ * Copyright (C) 1999-2005 Authors
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"  // only include where actually required!
+#endif
+
+#include <cstring>
+#include <string>
+
+#include <gtkmm/widget.h>
+#include <gdk/gdkkeysyms.h>
+#include <glibmm/i18n.h>
+
+#include "desktop.h"
+#include "document-undo.h"
+#include "document.h"
+#include "include/macros.h"
+#include "layer-manager.h"
+#include "message-stack.h"
+#include "rubberband.h"
+#include "selection-chemistry.h"
+#include "selection-describer.h"
+#include "selection.h"
+#include "seltrans.h"
+
+#include "actions/actions-tools.h" // set_active_tool()
+
+#include "display/drawing-item.h"
+#include "display/control/canvas-item-catchall.h"
+#include "display/control/canvas-item-drawing.h"
+#include "display/control/snap-indicator.h"
+
+#include "object/box3d.h"
+#include "style.h"
+
+#include "ui/cursor-utils.h"
+#include "ui/modifiers.h"
+
+#include "ui/tools/select-tool.h"
+
+#include "ui/widget/canvas.h"
+
+
+using Inkscape::DocumentUndo;
+using Inkscape::Modifiers::Modifier;
+
+namespace Inkscape {
+namespace UI {
+namespace Tools {
+
+static gint rb_escaped = 0; // if non-zero, rubberband was canceled by esc, so the next button release should not deselect
+static gint drag_escaped = 0; // if non-zero, drag was canceled by esc
+static bool is_cycling = false;
+
+SelectTool::SelectTool(SPDesktop *desktop)
+    : ToolBase(desktop, "/tools/select", "select.svg")
+    , dragging(false)
+    , _force_dragging(false)
+    , _alt_on(false)
+    , moved(false)
+    , button_press_state(0)
+    , cycling_wrap(true)
+    , item(nullptr)
+    , _seltrans(nullptr)
+    , _describer(nullptr)
+{
+    auto select_click = Modifier::get(Modifiers::Type::SELECT_ADD_TO)->get_label();
+    auto select_scroll = Modifier::get(Modifiers::Type::SELECT_CYCLE)->get_label();
+
+    // cursors in select context
+    _default_cursor = "select.svg";
+
+    no_selection_msg = g_strdup_printf(
+        _("No objects selected. Click, %s+click, %s+scroll mouse on top of objects, or drag around objects to select."),
+        select_click.c_str(), select_scroll.c_str());
+
+    this->_describer = new Inkscape::SelectionDescriber(
+                desktop->selection, 
+                desktop->messageStack(),
+                _("Click selection again to toggle scale/rotation handles"),
+                no_selection_msg);
+
+    this->_seltrans = new Inkscape::SelTrans(desktop);
+
+    sp_event_context_read(this, "show");
+    sp_event_context_read(this, "transform");
+
+    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+
+    if (prefs->getBool("/tools/select/gradientdrag")) {
+        this->enableGrDrag();
+    }
+}
+
+SelectTool::~SelectTool()
+{
+    this->enableGrDrag(false);
+
+    if (grabbed) {
+        grabbed->ungrab();
+        grabbed = nullptr;
+    }
+
+    delete this->_seltrans;
+    this->_seltrans = nullptr;
+
+    delete this->_describer;
+    this->_describer = nullptr;
+    g_free(no_selection_msg);
+
+    if (item) {
+        sp_object_unref(item);
+        item = nullptr;
+    }
+}
+
+void SelectTool::set(const Inkscape::Preferences::Entry& val) {
+    Glib::ustring path = val.getEntryName();
+
+    if (path == "show") {
+        if (val.getString() == "outline") {
+            this->_seltrans->setShow(Inkscape::SelTrans::SHOW_OUTLINE);
+        } else {
+            this->_seltrans->setShow(Inkscape::SelTrans::SHOW_CONTENT);
+        }
+    }
+}
+
+bool SelectTool::sp_select_context_abort() {
+    Inkscape::SelTrans *seltrans = this->_seltrans;
+
+    if (this->dragging) {
+        if (this->moved) { // cancel dragging an object
+            seltrans->ungrab();
+            this->moved = FALSE;
+            this->dragging = FALSE;
+            this->discard_delayed_snap_event();
+            drag_escaped = 1;
+
+            if (this->item) {
+                // only undo if the item is still valid
+                if (this->item->document) {
+                    DocumentUndo::undo(_desktop->getDocument());
+                }
+
+                sp_object_unref( this->item, nullptr);
+            }
+            this->item = nullptr;
+
+            _desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Move canceled."));
+            return true;
+        }
+    } else {
+        if (Inkscape::Rubberband::get(_desktop)->is_started()) {
+            Inkscape::Rubberband::get(_desktop)->stop();
+            rb_escaped = 1;
+            defaultMessageContext()->clear();
+            _desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Selection canceled."));
+            return true;
+        }
+    }
+    return false;
+}
+
+static bool
+key_is_a_modifier (guint key) {
+    return (key == GDK_KEY_Alt_L ||
+                key == GDK_KEY_Alt_R ||
+                key == GDK_KEY_Control_L ||
+                key == GDK_KEY_Control_R ||
+                key == GDK_KEY_Shift_L ||
+                key == GDK_KEY_Shift_R ||
+                key == GDK_KEY_Meta_L ||  // Meta is when you press Shift+Alt (at least on my machine)
+            key == GDK_KEY_Meta_R);
+}
+
+static void
+sp_select_context_up_one_layer(SPDesktop *desktop)
+{
+    /* Click in empty place, go up one level -- but don't leave a layer to root.
+     *
+     * (Rationale: we don't usually allow users to go to the root, since that
+     * detracts from the layer metaphor: objects at the root level can in front
+     * of or behind layers.  Whereas it's fine to go to the root if editing
+     * a document that has no layers (e.g. a non-Inkscape document).)
+     *
+     * Once we support editing SVG "islands" (e.g. <svg> embedded in an xhtml
+     * document), we might consider further restricting the below to disallow
+     * leaving a layer to go to a non-layer.
+     */
+    if (SPObject *const current_layer = desktop->layerManager().currentLayer()) {
+        SPObject *const parent = current_layer->parent;
+        SPGroup *current_group = dynamic_cast<SPGroup *>(current_layer);
+        if ( parent
+             && ( parent->parent
+                  || !( current_group
+                        && ( SPGroup::LAYER == current_group->layerMode() ) ) ) )
+        {
+            desktop->layerManager().setCurrentLayer(parent);
+            if (current_group && (SPGroup::LAYER != current_group->layerMode())) {
+                desktop->getSelection()->set(current_layer);
+            }
+        }
+    }
+}
+
+bool SelectTool::item_handler(SPItem* item, GdkEvent* event) {
+    gint ret = FALSE;
+
+    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+    tolerance = prefs->getIntLimited("/options/dragtolerance/value", 0, 0, 100);
+
+    // make sure we still have valid objects to move around
+    if (this->item && this->item->document == nullptr) {
+        this->sp_select_context_abort();
+    }
+
+    switch (event->type) {
+        case GDK_BUTTON_PRESS:
+            if (event->button.button == 1) {
+                /* Left mousebutton */
+
+                // save drag origin
+                xp = (gint) event->button.x;
+                yp = (gint) event->button.y;
+                within_tolerance = true;
+
+                // remember what modifiers were on before button press
+                this->button_press_state = event->button.state;
+                bool first_hit = Modifier::get(Modifiers::Type::SELECT_FIRST_HIT)->active(this->button_press_state);
+                bool force_drag = Modifier::get(Modifiers::Type::SELECT_FORCE_DRAG)->active(this->button_press_state);
+                bool always_box = Modifier::get(Modifiers::Type::SELECT_ALWAYS_BOX)->active(this->button_press_state);
+                bool touch_path = Modifier::get(Modifiers::Type::SELECT_TOUCH_PATH)->active(this->button_press_state);
+
+                // if shift or ctrl was pressed, do not move objects;
+                // pass the event to root handler which will perform rubberband, shift-click, ctrl-click, ctrl-drag
+                if (!(always_box || first_hit || touch_path)) {
+
+                    this->dragging = TRUE;
+                    this->moved = FALSE;
+
+                    this->set_cursor("select-dragging.svg");
+
+                    // remember the clicked item in this->item:
+                    if (this->item) {
+                        sp_object_unref(this->item, nullptr);
+                        this->item = nullptr;
+                    }
+
+                    this->item = sp_event_context_find_item (_desktop, Geom::Point(event->button.x, event->button.y), force_drag, FALSE);
+                    sp_object_ref(this->item, nullptr);
+
+                    rb_escaped = drag_escaped = 0;
+
+                    if (grabbed) {
+                        grabbed->ungrab();
+                        grabbed = nullptr;
+                    }
+
+                    grabbed = _desktop->getCanvasDrawing();
+                    grabbed->grab(Gdk::KEY_PRESS_MASK      |
+                                  Gdk::KEY_RELEASE_MASK    |
+                                  Gdk::BUTTON_PRESS_MASK   |
+                                  Gdk::BUTTON_RELEASE_MASK |
+                                  Gdk::POINTER_MOTION_MASK );
+
+                    ret = TRUE;
+                }
+            } else if (event->button.button == 3 && !this->dragging) {
+                // right click; do not eat it so that right-click menu can appear, but cancel dragging & rubberband
+                this->sp_select_context_abort();
+            }
+            break;
+    
+
+        case GDK_ENTER_NOTIFY: {
+            if (!dragging && !_alt_on && !_desktop->isWaitingCursor()) {
+                this->set_cursor("select-mouseover.svg");
+            }
+            break;
+        }
+        case GDK_LEAVE_NOTIFY:
+            if (!dragging && !_force_dragging && !_desktop->isWaitingCursor()) {
+                this->set_cursor("select.svg");
+            }
+            break;
+
+        case GDK_KEY_PRESS:
+            if (get_latin_keyval (&event->key) == GDK_KEY_space) {
+                if (this->dragging && this->grabbed) {
+                    /* stamping mode: show content mode moving */
+                    _seltrans->stamp();
+                    ret = TRUE;
+                }
+            } else if (get_latin_keyval (&event->key) == GDK_KEY_Tab) {
+                if (this->dragging && this->grabbed) {
+                    _seltrans->getNextClosestPoint(false);
+                } else {
+                    sp_selection_item_next(_desktop);
+                }
+                ret = TRUE;
+            } else if (get_latin_keyval (&event->key) == GDK_KEY_ISO_Left_Tab) {
+                if (this->dragging && this->grabbed) {
+                    _seltrans->getNextClosestPoint(true);
+                } else {
+                    sp_selection_item_prev(_desktop);
+                }
+                ret = TRUE;
+            }
+            break;
+
+        case GDK_BUTTON_RELEASE:
+        case GDK_KEY_RELEASE:
+            if (_alt_on) {
+                _default_cursor = "select-mouseover.svg";
+            }
+            break;
+
+        default:
+            break;
+    }
+
+    if (!ret) {
+        ret = ToolBase::item_handler(item, event);
+    }
+
+    return ret;
+}
+
+void SelectTool::sp_select_context_cycle_through_items(Inkscape::Selection *selection, GdkEventScroll *scroll_event) {
+    if ( this->cycling_items.empty() )
+        return;
+
+    Inkscape::DrawingItem *arenaitem;
+
+    if(cycling_cur_item) {
+        arenaitem = cycling_cur_item->get_arenaitem(_desktop->dkey);
+        arenaitem->setOpacity(0.3);
+    }
+
+    // Find next item and activate it
+
+
+    std::vector<SPItem *>::iterator next = cycling_items.end();
+
+    if ((scroll_event->direction == GDK_SCROLL_UP) ||
+        (scroll_event->direction == GDK_SCROLL_SMOOTH && scroll_event->delta_y < 0)) {
+        if (! cycling_cur_item) {
+            next = cycling_items.begin();
+        } else {
+            next = std::find( cycling_items.begin(), cycling_items.end(), cycling_cur_item );
+            g_assert (next != cycling_items.end());
+            ++next;
+            if (next == cycling_items.end()) {
+                if ( cycling_wrap ) {
+                    next = cycling_items.begin();
+                } else {
+                    --next;
+                }
+            }
+        }
+    } else { 
+        if (! cycling_cur_item) {
+            next = cycling_items.end();
+            --next;
+        } else {
+            next = std::find( cycling_items.begin(), cycling_items.end(), cycling_cur_item );
+            g_assert (next != cycling_items.end());
+            if (next == cycling_items.begin()){
+                if ( cycling_wrap ) { 
+                    next = cycling_items.end();
+                    --next;
+                }
+            } else {
+                --next;
+            }
+        }
+    }
+
+    this->cycling_cur_item = *next;
+    g_assert(next != cycling_items.end());
+    g_assert(cycling_cur_item != nullptr);
+
+    arenaitem = cycling_cur_item->get_arenaitem(_desktop->dkey);
+    arenaitem->setOpacity(1.0);
+
+    if (Modifier::get(Modifiers::Type::SELECT_ADD_TO)->active(scroll_event->state)) {
+        selection->add(cycling_cur_item);
+    } else {
+        selection->set(cycling_cur_item);
+    }
+}
+
+void SelectTool::sp_select_context_reset_opacities() {
+    for (auto item : this->cycling_items_cmp) {
+        if (item) {
+            Inkscape::DrawingItem *arenaitem = item->get_arenaitem(_desktop->dkey);
+            arenaitem->setOpacity(SP_SCALE24_TO_FLOAT(item->style->opacity.value));
+        } else {
+            g_assert_not_reached();
+        }
+    }
+
+    this->cycling_items_cmp.clear();
+    this->cycling_cur_item = nullptr;
+}
+
+bool SelectTool::root_handler(GdkEvent* event) {
+    SPItem *item = nullptr;
+    SPItem *item_at_point = nullptr, *group_at_point = nullptr, *item_in_group = nullptr;
+    gint ret = FALSE;
+
+    Inkscape::Selection *selection = _desktop->getSelection();
+    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+
+    // make sure we still have valid objects to move around
+    if (this->item && this->item->document == nullptr) {
+        this->sp_select_context_abort();
+    }
+
+    switch (event->type) {
+        case GDK_2BUTTON_PRESS:
+            if (event->button.button == 1) {
+                if (!selection->isEmpty()) {
+                    SPItem *clicked_item = selection->items().front();
+
+                    if (dynamic_cast<SPGroup *>(clicked_item) && !dynamic_cast<SPBox3D *>(clicked_item)) { // enter group if it's not a 3D box
+                        _desktop->layerManager().setCurrentLayer(clicked_item);
+                        _desktop->getSelection()->clear();
+                        this->dragging = false;
+                        this->discard_delayed_snap_event();
+
+                    } else { // switch tool
+                        Geom::Point const button_pt(event->button.x, event->button.y);
+                        Geom::Point const p(_desktop->w2d(button_pt));
+                        set_active_tool(_desktop, clicked_item, p);
+                    }
+                } else {
+                    sp_select_context_up_one_layer(_desktop);
+                }
+
+                ret = TRUE;
+            }
+            break;
+
+        case GDK_BUTTON_PRESS:
+            if (event->button.button == 1) {
+                // save drag origin
+                xp = (gint) event->button.x;
+                yp = (gint) event->button.y;
+                within_tolerance = true;
+
+                Geom::Point const button_pt(event->button.x, event->button.y);
+                Geom::Point const p(_desktop->w2d(button_pt));
+
+                if(Modifier::get(Modifiers::Type::SELECT_TOUCH_PATH)->active(event->button.state)) {
+                    Inkscape::Rubberband::get(_desktop)->setMode(RUBBERBAND_MODE_TOUCHPATH);
+                } else {
+                    Inkscape::Rubberband::get(_desktop)->defaultMode();
+                }
+
+                Inkscape::Rubberband::get(_desktop)->start(_desktop, p);
+
+                if (this->grabbed) {
+                    grabbed->ungrab();
+                    this->grabbed = nullptr;
+                }
+
+                grabbed = _desktop->getCanvasCatchall();
+                grabbed->grab(Gdk::KEY_PRESS_MASK      |
+                              Gdk::KEY_RELEASE_MASK    |
+                              Gdk::BUTTON_PRESS_MASK   |
+                              Gdk::BUTTON_RELEASE_MASK |
+                              Gdk::POINTER_MOTION_MASK );
+
+                // remember what modifiers were on before button press
+                this->button_press_state = event->button.state;
+
+                this->moved = FALSE;
+
+                rb_escaped = drag_escaped = 0;
+
+                ret = TRUE;
+            } else if (event->button.button == 3) {
+                // right click; do not eat it so that right-click menu can appear, but cancel dragging & rubberband
+                this->sp_select_context_abort();
+            }
+            break;
+
+        case GDK_MOTION_NOTIFY:
+        {
+            if (this->grabbed && event->button.state & (GDK_SHIFT_MASK | GDK_MOD1_MASK)) {
+                _desktop->snapindicator->remove_snaptarget();
+            }
+
+            tolerance = prefs->getIntLimited("/options/dragtolerance/value", 0, 0, 100);
+
+            bool first_hit = Modifier::get(Modifiers::Type::SELECT_FIRST_HIT)->active(this->button_press_state);
+            bool force_drag = Modifier::get(Modifiers::Type::SELECT_FORCE_DRAG)->active(this->button_press_state);
+            bool always_box = Modifier::get(Modifiers::Type::SELECT_ALWAYS_BOX)->active(this->button_press_state);
+
+            if ((event->motion.state & GDK_BUTTON1_MASK)) {
+                Geom::Point const motion_pt(event->motion.x, event->motion.y);
+                Geom::Point const p(_desktop->w2d(motion_pt));
+                if ( within_tolerance
+                     && ( abs( (gint) event->motion.x - xp ) < tolerance )
+                     && ( abs( (gint) event->motion.y - yp ) < 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 move the object, not click), then always process the
+                // motion notify coordinates as given (no snapping back to origin)
+                within_tolerance = false;
+
+                if (first_hit || (force_drag && !always_box && !selection->isEmpty())) {
+                    // if it's not click and ctrl or alt was pressed (the latter with some selection
+                    // but not with shift) we want to drag rather than rubberband
+                    this->dragging = TRUE;
+                    this->set_cursor("select-dragging.svg");
+                }
+
+                if (this->dragging) {
+                    /* User has dragged fast, so we get events on root (lauris)*/
+                    // not only that; we will end up here when ctrl-dragging as well
+                    // and also when we started within tolerance, but trespassed tolerance outside of item
+                    if (Inkscape::Rubberband::get(_desktop)->is_started()) {
+                        Inkscape::Rubberband::get(_desktop)->stop();
+                    }
+                    this->defaultMessageContext()->clear();
+
+                    // Look for an item where the mouse was reported to be by mouse press (not mouse move).
+                    item_at_point = _desktop->getItemAtPoint(Geom::Point(xp, yp), FALSE);
+
+                    if (item_at_point || this->moved || force_drag) {
+                        // drag only if starting from an item, or if something is already grabbed, or if alt-dragging
+                        if (!this->moved) {
+                            item_in_group = _desktop->getItemAtPoint(Geom::Point(event->button.x, event->button.y), TRUE);
+                            group_at_point = _desktop->getGroupAtPoint(Geom::Point(event->button.x, event->button.y));
+
+                            {
+                                SPGroup *selGroup = dynamic_cast<SPGroup *>(selection->single());
+                                if (selGroup && (selGroup->layerMode() == SPGroup::LAYER)) {
+                                    group_at_point = selGroup;
+                                }
+                            }
+
+                            // group-at-point is meant to be topmost item if it's a group,
+                            // not topmost group of all items at point
+                            if (group_at_point != item_in_group &&
+                                !(group_at_point && item_at_point &&
+                                  group_at_point->isAncestorOf(item_at_point))) {
+                                group_at_point = nullptr;
+                            }
+
+                            // if neither a group nor an item (possibly in a group) at point are selected, set selection to the item at point
+                            if ((!item_in_group || !selection->includes(item_in_group)) &&
+                                (!group_at_point || !selection->includes(group_at_point)) && !force_drag) {
+                                // select what is under cursor
+                                if (!_seltrans->isEmpty()) {
+                                    _seltrans->resetState();
+                                }
+
+                                // when simply ctrl-dragging, we don't want to go into groups
+                                if (item_at_point && !selection->includes(item_at_point)) {
+                                    selection->set(item_at_point);
+                                }
+                            } // otherwise, do not change selection so that dragging selected-within-group items, as well as alt-dragging, is possible
+
+                            _seltrans->grab(p, -1, -1, FALSE, TRUE);
+                            this->moved = TRUE;
+                        }
+
+                        if (!_seltrans->isEmpty()) {
+                            // this->discard_delayed_snap_event();
+                            _seltrans->moveTo(p, event->button.state);
+                        }
+
+                        _desktop->scroll_to_point(p);
+                        gobble_motion_events(GDK_BUTTON1_MASK);
+                        ret = TRUE;
+                    } else {
+                        this->dragging = FALSE;
+                        this->discard_delayed_snap_event();
+                    }
+
+                } else {
+                    if (Inkscape::Rubberband::get(_desktop)->is_started()) {
+                        Inkscape::Rubberband::get(_desktop)->move(p);
+
+                        auto touch_path = Modifier::get(Modifiers::Type::SELECT_TOUCH_PATH)->get_label();
+                        auto mode = Inkscape::Rubberband::get(_desktop)->getMode();
+                        if (mode == RUBBERBAND_MODE_TOUCHPATH) {
+                            this->defaultMessageContext()->setF(Inkscape::NORMAL_MESSAGE,
+                                _("<b>Draw over</b> objects to select them; release <b>%s</b> to switch to rubberband selection"), touch_path.c_str());
+                        } else if (mode == RUBBERBAND_MODE_TOUCHRECT) {
+                            this->defaultMessageContext()->setF(Inkscape::NORMAL_MESSAGE,
+                                _("<b>Drag near</b> objects to select them; press <b>%s</b> to switch to touch selection"), touch_path.c_str());
+                        } else {
+                            this->defaultMessageContext()->setF(Inkscape::NORMAL_MESSAGE,
+                                _("<b>Drag around</b> objects to select them; press <b>%s</b> to switch to touch selection"), touch_path.c_str());
+                        }
+
+                        gobble_motion_events(GDK_BUTTON1_MASK);
+                    }
+                }
+            }
+            break;
+        }
+        case GDK_BUTTON_RELEASE:
+            xp = yp = 0;
+
+            if ((event->button.button == 1) && (this->grabbed)) {
+                if (this->dragging) {
+
+                    if (this->moved) {
+                        // item has been moved
+                        _seltrans->ungrab();
+                        this->moved = FALSE;
+                    } else if (this->item && !drag_escaped) {
+                        // item has not been moved -> simply a click, do selecting
+                        if (!selection->isEmpty()) {
+                            if(Modifier::get(Modifiers::Type::SELECT_ADD_TO)->active(event->button.state)) {
+                                // with shift, toggle selection
+                                _seltrans->resetState();
+                                selection->toggle(this->item);
+                            } else {
+                                SPObject* single = selection->single();
+                                SPGroup *singleGroup = dynamic_cast<SPGroup *>(single);
+                                // without shift, increase state (i.e. toggle scale/rotation handles)
+                                if (selection->includes(this->item)) {
+                                    _seltrans->increaseState();
+                                } else if (singleGroup && (singleGroup->layerMode() == SPGroup::LAYER) && single->isAncestorOf(this->item)) {
+                                    _seltrans->increaseState();
+                                } else {
+                                    _seltrans->resetState();
+                                    selection->set(this->item);
+                                }
+                            }
+                        } else { // simple or shift click, no previous selection
+                            _seltrans->resetState();
+                            selection->set(this->item);
+                        }
+                    }
+
+                    this->dragging = FALSE;
+
+                    auto window = _desktop->getCanvas()->get_window();
+
+                    if (!_alt_on) {
+                        if (_force_dragging) {
+                            this->set_cursor(_default_cursor);
+                            _force_dragging = false;
+                        } else {
+                            this->set_cursor("select-mouseover.svg");
+                        }
+                    }
+
+                    this->discard_delayed_snap_event();
+
+                    if (this->item) {
+                        sp_object_unref( this->item, nullptr);
+                    }
+
+                    this->item = nullptr;
+                } else {
+                    Inkscape::Rubberband *r = Inkscape::Rubberband::get(_desktop);
+
+                    if (r->is_started() && !within_tolerance) {
+                        // this was a rubberband drag
+                        std::vector<SPItem*> items;
+
+                        if (r->getMode() == RUBBERBAND_MODE_RECT) {
+                            Geom::OptRect const b = r->getRectangle();
+                            items = _desktop->getDocument()->getItemsInBox(_desktop->dkey, (*b) * _desktop->dt2doc());
+                        } else if (r->getMode() == RUBBERBAND_MODE_TOUCHRECT) {
+                            Geom::OptRect const b = r->getRectangle();
+                            items = _desktop->getDocument()->getItemsPartiallyInBox(_desktop->dkey, (*b) * _desktop->dt2doc());
+                        } else if (r->getMode() == RUBBERBAND_MODE_TOUCHPATH) {
+                            bool topmost_items_only = prefs->getBool("/options/selection/touchsel_topmost_only");
+                            items = _desktop->getDocument()->getItemsAtPoints(_desktop->dkey, r->getPoints(), true, topmost_items_only);
+                        }
+
+                        _seltrans->resetState();
+                        r->stop();
+                        this->defaultMessageContext()->clear();
+
+                        if(Modifier::get(Modifiers::Type::SELECT_ADD_TO)->active(event->button.state)) {
+                            // with shift, add to selection
+                            selection->addList (items);
+                        } else {
+                            // without shift, simply select anew
+                            selection->setList (items);
+                        }
+
+                    } else { // it was just a click, or a too small rubberband
+                        r->stop();
+
+                        bool add_to = Modifier::get(Modifiers::Type::SELECT_ADD_TO)->active(event->button.state);
+                        bool in_groups = Modifier::get(Modifiers::Type::SELECT_IN_GROUPS)->active(event->button.state);
+                        bool force_drag = Modifier::get(Modifiers::Type::SELECT_FORCE_DRAG)->active(event->button.state);
+
+                        if (add_to && !rb_escaped && !drag_escaped) {
+                            // this was a shift+click or alt+shift+click, select what was clicked upon
+
+                            if (in_groups) {
+                                // go into groups, honoring force_drag (Alt)
+                                item = sp_event_context_find_item (_desktop,
+                                                   Geom::Point(event->button.x, event->button.y), force_drag, TRUE);
+                            } else {
+                                // don't go into groups, honoring Alt
+                                item = sp_event_context_find_item (_desktop,
+                                                   Geom::Point(event->button.x, event->button.y), force_drag, FALSE);
+                            }
+
+                            if (item) {
+                                selection->toggle(item);
+                                item = nullptr;
+                            }
+
+                        } else if ((in_groups || force_drag) && !rb_escaped && !drag_escaped) { // ctrl+click, alt+click
+                            item = sp_event_context_find_item (_desktop,
+                                         Geom::Point(event->button.x, event->button.y), force_drag, in_groups);
+
+                            if (item) {
+                                if (selection->includes(item)) {
+                                    _seltrans->increaseState();
+                                } else {
+                                    _seltrans->resetState();
+                                    selection->set(item);
+                                }
+
+                                item = nullptr;
+                            }
+                        } else { // click without shift, simply deselect, unless with Alt or something was cancelled
+                            if (!selection->isEmpty()) {
+                                if (!(rb_escaped) && !(drag_escaped) && !force_drag) {
+                                    selection->clear();
+                                }
+
+                                rb_escaped = 0;
+                            }
+                        }
+                    }
+
+                    ret = TRUE;
+                }
+                if (grabbed) {
+                    grabbed->ungrab();
+                    grabbed = nullptr;
+                }
+                // Think is not necessary now
+                // _desktop->updateNow();
+            }
+
+            if (event->button.button == 1) {
+                Inkscape::Rubberband::get(_desktop)->stop(); // might have been started in another tool!
+            }
+
+            this->button_press_state = 0;
+            break;
+
+        case GDK_SCROLL: {
+
+            GdkEventScroll *scroll_event = (GdkEventScroll*) event;
+
+            // do nothing specific if alt was not pressed
+            if ( ! Modifier::get(Modifiers::Type::SELECT_CYCLE)->active(scroll_event->state))
+                break;
+
+            is_cycling = true;
+
+            /* Rebuild list of items underneath the mouse pointer */
+            Geom::Point p = _desktop->d2w(_desktop->point());
+            SPItem *item = _desktop->getItemAtPoint(p, true, nullptr);
+            this->cycling_items.clear();
+
+            SPItem *tmp = nullptr;
+            while(item != nullptr) {
+                this->cycling_items.push_back(item);
+                item = _desktop->getItemAtPoint(p, true, item);
+                if (selection->includes(item)) tmp = item;
+            }
+
+            /* Compare current item list with item list during previous scroll ... */
+            bool item_lists_differ = this->cycling_items != this->cycling_items_cmp;
+
+            if(item_lists_differ) {
+                this->sp_select_context_reset_opacities();
+                for (auto l : this->cycling_items_cmp) 
+                    selection->remove(l); // deselects the previous content of the cycling loop
+                this->cycling_items_cmp = (this->cycling_items);
+
+                // set opacities in new stack
+                for(auto item : this->cycling_items) {
+                    if (item) {
+                        Inkscape::DrawingItem *arenaitem = item->get_arenaitem(_desktop->dkey);
+                        arenaitem->setOpacity(0.3);
+                    }
+                }
+            }
+            if(!cycling_cur_item) cycling_cur_item = tmp;
+
+            this->cycling_wrap = prefs->getBool("/options/selection/cycleWrap", true);
+
+            // Cycle through the items underneath the mouse pointer, one-by-one
+            this->sp_select_context_cycle_through_items(selection, scroll_event);
+
+            ret = TRUE;
+
+            GtkWindow *w = GTK_WINDOW(gtk_widget_get_toplevel(GTK_WIDGET(_desktop->getCanvas()->gobj())));
+            if (w) {
+                gtk_window_present(w);
+                _desktop->getCanvas()->grab_focus();
+            }
+            break;
+        }
+
+        case GDK_KEY_PRESS: // keybindings for select context
+            {
+            {
+            guint keyval = get_latin_keyval(&event->key);
+            
+                bool alt = ( MOD__ALT(event)
+                                    || (keyval == GDK_KEY_Alt_L)
+                                    || (keyval == GDK_KEY_Alt_R)
+                                    || (keyval == GDK_KEY_Meta_L)
+                                    || (keyval == GDK_KEY_Meta_R));
+
+            if (alt) {
+                _alt_on = true;
+            }
+
+            if (!key_is_a_modifier (keyval)) {
+                this->defaultMessageContext()->clear();
+            } else if (this->grabbed || _seltrans->isGrabbed()) {
+                if (Inkscape::Rubberband::get(_desktop)->is_started()) {
+                    // if Alt then change cursor to moving cursor:
+                    if (Modifier::get(Modifiers::Type::SELECT_TOUCH_PATH)->active(event->key.state | keyval)) {
+                        Inkscape::Rubberband::get(_desktop)->setMode(RUBBERBAND_MODE_TOUCHPATH);
+                    }
+                } else {
+                    // do not change the statusbar text when mousekey is down to move or transform the object,
+                    // because the statusbar text is already updated somewhere else.
+                    break;
+                }
+            } else {
+                    Modifiers::responsive_tooltip(this->defaultMessageContext(), event, 6,
+                        Modifiers::Type::SELECT_IN_GROUPS, Modifiers::Type::MOVE_CONFINE,
+                        Modifiers::Type::SELECT_ADD_TO, Modifiers::Type::SELECT_TOUCH_PATH,
+                        Modifiers::Type::SELECT_CYCLE, Modifiers::Type::SELECT_FORCE_DRAG);
+
+                    // if Alt and nonempty selection, show moving cursor ("move selected"):
+                    if (alt && !selection->isEmpty() && !_desktop->isWaitingCursor()) {
+                        this->set_cursor("select-dragging.svg");
+                        _force_dragging = true;
+                        _default_cursor = "select.svg";
+                    }
+                    //*/
+                    break;
+            }
+            }
+
+            gdouble const nudge = prefs->getDoubleLimited("/options/nudgedistance/value", 2, 0, 1000, "px"); // in px
+            int const snaps = prefs->getInt("/options/rotationsnapsperpi/value", 12);
+            auto const y_dir = _desktop->yaxisdir();
+
+            switch (get_latin_keyval (&event->key)) {
+                case GDK_KEY_Left: // move selection left
+                case GDK_KEY_KP_Left:
+                    if (!MOD__CTRL(event)) { // not ctrl
+                        gint mul = 1 + gobble_key_events( get_latin_keyval(&event->key), 0); // with any mask
+                        
+                        if (MOD__ALT(event)) { // alt
+                            if (MOD__SHIFT(event)) {
+                                _desktop->getSelection()->moveScreen(mul*-10, 0); // shift
+                            } else {
+                                _desktop->getSelection()->moveScreen(mul*-1, 0); // no shift
+                            }
+                        } else { // no alt
+                            if (MOD__SHIFT(event)) {
+                                _desktop->getSelection()->move(mul*-10*nudge, 0); // shift
+                            } else {
+                                _desktop->getSelection()->move(mul*-nudge, 0); // no shift
+                            }
+                        }
+                        
+                        ret = TRUE;
+                    }
+                    break;
+                    
+                case GDK_KEY_Up: // move selection up
+                case GDK_KEY_KP_Up:
+                    if (!MOD__CTRL(event)) { // not ctrl
+                        gint mul = 1 + gobble_key_events(get_latin_keyval(&event->key), 0); // with any mask
+                        mul *= -y_dir;
+                        
+                        if (MOD__ALT(event)) { // alt
+                            if (MOD__SHIFT(event)) {
+                                _desktop->getSelection()->moveScreen(0, mul*10); // shift
+                            } else {
+                                _desktop->getSelection()->moveScreen(0, mul*1); // no shift
+                            }
+                        } else { // no alt
+                            if (MOD__SHIFT(event)) {
+                                _desktop->getSelection()->move(0, mul*10*nudge); // shift
+                            } else {
+                                _desktop->getSelection()->move(0, mul*nudge); // no shift
+                            }
+                        }
+                        
+                        ret = TRUE;
+                    }
+                    break;
+                    
+                case GDK_KEY_Right: // move selection right
+                case GDK_KEY_KP_Right:
+                    if (!MOD__CTRL(event)) { // not ctrl
+                        gint mul = 1 + gobble_key_events(get_latin_keyval(&event->key), 0); // with any mask
+                        
+                        if (MOD__ALT(event)) { // alt
+                            if (MOD__SHIFT(event)) {
+                                _desktop->getSelection()->moveScreen(mul*10, 0); // shift
+                            } else {
+                                _desktop->getSelection()->moveScreen(mul*1, 0); // no shift
+                            }
+                        } else { // no alt
+                            if (MOD__SHIFT(event)) {
+                                _desktop->getSelection()->move(mul*10*nudge, 0); // shift
+                            } else {
+                                _desktop->getSelection()->move(mul*nudge, 0); // no shift
+                            }
+                        }
+                        
+                        ret = TRUE;
+                    }
+                    break;
+                    
+                case GDK_KEY_Down: // move selection down
+                case GDK_KEY_KP_Down:
+                    if (!MOD__CTRL(event)) { // not ctrl
+                        gint mul = 1 + gobble_key_events(get_latin_keyval(&event->key), 0); // with any mask
+                        mul *= -y_dir;
+                        
+                        if (MOD__ALT(event)) { // alt
+                            if (MOD__SHIFT(event)) {
+                                _desktop->getSelection()->moveScreen(0, mul*-10); // shift
+                            } else {
+                                _desktop->getSelection()->moveScreen(0, mul*-1); // no shift
+                            }
+                        } else { // no alt
+                            if (MOD__SHIFT(event)) {
+                                _desktop->getSelection()->move(0, mul*-10*nudge); // shift
+                            } else {
+                                _desktop->getSelection()->move(0, mul*-nudge); // no shift
+                            }
+                        }
+                        
+                        ret = TRUE;
+                    }
+                    break;
+                    
+                case GDK_KEY_Escape:
+                    if (!this->sp_select_context_abort()) {
+                        selection->clear();
+                    }
+                    
+                    ret = TRUE;
+                    break;
+
+                case GDK_KEY_a:
+                case GDK_KEY_A:
+                    if (MOD__CTRL_ONLY(event)) {
+                        sp_edit_select_all(_desktop);
+                        ret = TRUE;
+                    }
+                    break;
+                    
+                case GDK_KEY_space:
+                    /* stamping mode: show outline mode moving */
+                    /* FIXME: Is next condition ok? (lauris) */
+                    if (this->dragging && this->grabbed) {
+                        _seltrans->stamp();
+                        ret = TRUE;
+                    }
+                    break;
+                    
+                case GDK_KEY_x:
+                case GDK_KEY_X:
+                    if (MOD__ALT_ONLY(event)) {
+                        _desktop->setToolboxFocusTo("select-x");
+                        ret = TRUE;
+                    }
+                    break;
+                    
+                case GDK_KEY_bracketleft:
+                    if (MOD__ALT(event)) {
+                        gint mul = 1 + gobble_key_events(get_latin_keyval(&event->key), 0); // with any mask
+                        selection->rotateScreen(-mul * y_dir);
+                    } else if (MOD__CTRL(event)) {
+                        selection->rotate(-90 * y_dir);
+                    } else if (snaps) {
+                        selection->rotate(-180.0/snaps * y_dir);
+                    }
+                    
+                    ret = TRUE;
+                    break;
+                    
+                case GDK_KEY_bracketright:
+                    if (MOD__ALT(event)) {
+                        gint mul = 1 + gobble_key_events(get_latin_keyval(&event->key), 0); // with any mask
+                        selection->rotateScreen(mul * y_dir);
+                    } else if (MOD__CTRL(event)) {
+                        selection->rotate(90 * y_dir);
+                    } else if (snaps) {
+                        selection->rotate(180.0/snaps * y_dir);
+                    }
+                    
+                    ret = TRUE;
+                    break;
+
+                case GDK_KEY_Return:
+                    if (MOD__CTRL_ONLY(event)) {
+                        if (selection->singleItem()) {
+                            SPItem *clicked_item = selection->singleItem();
+                            SPGroup *clickedGroup = dynamic_cast<SPGroup *>(clicked_item);
+                            if ( (clickedGroup && (clickedGroup->layerMode() != SPGroup::LAYER)) || dynamic_cast<SPBox3D *>(clicked_item)) { // enter group or a 3D box
+                                _desktop->layerManager().setCurrentLayer(clicked_item);
+                                _desktop->getSelection()->clear();
+                            } else {
+                                _desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Selected object is not a group. Cannot enter."));
+                            }
+                        }
+                        
+                        ret = TRUE;
+                    }
+                    break;
+                    
+                case GDK_KEY_BackSpace:
+                    if (MOD__CTRL_ONLY(event)) {
+                        sp_select_context_up_one_layer(_desktop);
+                        ret = TRUE;
+                    }
+                    break;
+                    
+                case GDK_KEY_s:
+                case GDK_KEY_S:
+                    if (MOD__SHIFT_ONLY(event)) {
+                        if (!selection->isEmpty()) {
+                            _seltrans->increaseState();
+                        }
+                        
+                        ret = TRUE;
+                    }
+                    break;
+                    
+                case GDK_KEY_g:
+                case GDK_KEY_G:
+                    if (MOD__SHIFT_ONLY(event)) {
+                        _desktop->selection->toGuides();
+                        ret = true;
+                    }
+                    break;
+                    
+                default:
+                    break;
+            }
+            break;
+            }
+        case GDK_KEY_RELEASE: {
+            guint keyval = get_latin_keyval(&event->key);
+            if (key_is_a_modifier (keyval)) {
+                this->defaultMessageContext()->clear();
+            }
+            
+            bool alt = ( MOD__ALT(event)
+                         || (keyval == GDK_KEY_Alt_L)
+                         || (keyval == GDK_KEY_Alt_R)
+                         || (keyval == GDK_KEY_Meta_L)
+                         || (keyval == GDK_KEY_Meta_R));
+
+            if (alt) {
+                _alt_on = false;
+            }
+
+            if (Inkscape::Rubberband::get(_desktop)->is_started()) {
+                // if Alt then change cursor to moving cursor:
+                if (alt) {
+                    Inkscape::Rubberband::get(_desktop)->defaultMode();
+                }
+            } else {
+                if (alt) {
+                    // quit cycle-selection and reset opacities
+                    if (is_cycling) {
+                        this->sp_select_context_reset_opacities();
+                        is_cycling = false;
+                    }
+                }
+            }
+
+            // set cursor to default.
+            if (alt && !(this->grabbed || _seltrans->isGrabbed()) && !selection->isEmpty() && !_desktop->isWaitingCursor()) {
+                this->set_cursor(_default_cursor);
+                _force_dragging = false;
+            }
+            break;
+        }
+        default:
+            break;
+    }
+
+    if (!ret) {
+        ret = ToolBase::root_handler(event);
+    }
+
+    return ret;
+}
+
+}
+}
+}
+
+/*
+  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 :