Adding upstream version 1.0.2.upstream/1.0.2upstream

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

1 files changed, 1171 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..c3a7b63
--- /dev/null
+++ b/src/ui/tools/select-tool.cpp
@@ -0,0 +1,1171 @@
+// 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 "message-stack.h"
+#include "rubberband.h"
+#include "selection-chemistry.h"
+#include "selection-describer.h"
+#include "selection.h"
+#include "seltrans.h"
+#include "sp-cursor.h"
+
+#include "display/drawing-item.h"
+#include "display/sp-canvas.h"
+#include "display/sp-canvas-item.h"
+
+#include "object/box3d.h"
+#include "style.h"
+
+#include "ui/pixmaps/cursor-select-d.xpm"
+#include "ui/pixmaps/cursor-select-m.xpm"
+#include "ui/pixmaps/handles.xpm"
+
+#include "ui/tools-switch.h"
+#include "ui/tools/select-tool.h"
+
+#ifdef WITH_DBUS
+#include "extension/dbus/document-interface.h"
+#endif
+
+
+using Inkscape::DocumentUndo;
+
+GdkPixbuf *handles[23];
+
+namespace Inkscape {
+namespace UI {
+namespace Tools {
+
+static GdkCursor *CursorSelectMouseover = nullptr;
+static GdkCursor *CursorSelectDragging = nullptr;
+
+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
+
+const std::string& SelectTool::getPrefsPath() {
+    return SelectTool::prefsPath;
+}
+
+const std::string SelectTool::prefsPath = "/tools/select";
+
+
+//Creates rotated variations for handles
+static void
+sp_load_handles(int start, int count, char const **xpm) {
+    handles[start] = gdk_pixbuf_new_from_xpm_data((gchar const **)xpm);
+    for(int i = start + 1; i < start + count; i++) {
+        // We use either the original at *start or previous loop item to rotate
+        handles[i] = gdk_pixbuf_rotate_simple(handles[i-1], GDK_PIXBUF_ROTATE_CLOCKWISE);
+    }
+}
+
+SelectTool::SelectTool()
+    // Don't load a default cursor
+    : ToolBase(nullptr)
+    , dragging(false)
+    , moved(false)
+    , button_press_shift(false)
+    , button_press_ctrl(false)
+    , button_press_alt(false)
+    , cycling_wrap(true)
+    , item(nullptr)
+    , grabbed(nullptr)
+    , _seltrans(nullptr)
+    , _describer(nullptr)
+{
+    // cursors in select context
+    CursorSelectMouseover = sp_cursor_from_xpm(cursor_select_m_xpm);
+    CursorSelectDragging = sp_cursor_from_xpm(cursor_select_d_xpm);
+    
+    // selection handles
+    sp_load_handles(0, 2, handle_scale_xpm);
+    sp_load_handles(2, 2, handle_stretch_xpm);
+    sp_load_handles(4, 4, handle_rotate_xpm);
+    sp_load_handles(8, 4, handle_skew_xpm);
+    sp_load_handles(12, 1, handle_center_xpm);
+    sp_load_handles(13, 4, handle_align_xpm);
+    sp_load_handles(17, 1, handle_align_center_xpm);
+    sp_load_handles(18, 4, handle_align_corner_xpm);
+}
+
+//static gint xp = 0, yp = 0; // where drag started
+//static gint tolerance = 0;
+//static bool within_tolerance = false;
+static bool is_cycling = false;
+
+
+SelectTool::~SelectTool() {
+    this->enableGrDrag(false);
+
+    if (this->grabbed) {
+        sp_canvas_item_ungrab(this->grabbed);
+        this->grabbed = nullptr;
+    }
+
+    delete this->_seltrans;
+    this->_seltrans = nullptr;
+
+    delete this->_describer;
+    this->_describer = nullptr;
+
+    if (CursorSelectDragging) {
+        g_object_unref(CursorSelectDragging);
+        CursorSelectDragging = nullptr;
+    }
+    
+    if (CursorSelectMouseover) {
+        g_object_unref(CursorSelectMouseover);
+        CursorSelectMouseover = nullptr;
+    }
+    this->desktop->canvas->endForcedFullRedraws();
+}
+
+void SelectTool::setup() {
+    ToolBase::setup();
+
+    this->_describer = new Inkscape::SelectionDescriber(
+                desktop->selection, 
+                desktop->messageStack(),
+                _("Click selection to toggle scale/rotation handles (or Shift+s)"),
+                _("No objects selected. Click, Shift+click, Alt+scroll mouse on top of objects, or drag around objects to select.")
+    );
+
+    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();
+    }
+}
+
+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;
+            sp_event_context_discard_delayed_snap_event(this);
+            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);
+            } else if (this->button_press_ctrl) {
+                // NOTE:  This is a workaround to a bug.
+                // When the ctrl key is held, sc->item is not defined
+                // so in this case (only), we skip the object doc check
+                DocumentUndo::undo(desktop->getDocument());
+            }
+            this->item = nullptr;
+
+            SP_EVENT_CONTEXT(this)->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;
+            SP_EVENT_CONTEXT(this)->defaultMessageContext()->clear();
+            SP_EVENT_CONTEXT(this)->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.
+     */
+    SPObject *const current_layer = desktop->currentLayer();
+    if (current_layer) {
+        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->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 && !this->space_panning) {
+                /* 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_shift = (event->button.state & GDK_SHIFT_MASK) ? true : false;
+                this->button_press_ctrl = (event->button.state & GDK_CONTROL_MASK) ? true : false;
+                this->button_press_alt = (event->button.state & GDK_MOD1_MASK) ? true : false;
+
+                if (event->button.state & (GDK_SHIFT_MASK | GDK_CONTROL_MASK | GDK_MOD1_MASK)) {
+                    // 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
+                } else {
+                    GdkWindow* window = gtk_widget_get_window (GTK_WIDGET (desktop->getCanvas()));
+                   
+                    this->dragging = TRUE;
+                    this->moved = FALSE;
+
+                    gdk_window_set_cursor(window, CursorSelectDragging);
+
+
+                    // 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), event->button.state & GDK_MOD1_MASK, FALSE);
+                    sp_object_ref(this->item, nullptr);
+
+                    rb_escaped = drag_escaped = 0;
+
+                    if (this->grabbed) {
+                        sp_canvas_item_ungrab(this->grabbed);
+                        this->grabbed = nullptr;
+                    }
+
+                    sp_canvas_item_grab(SP_CANVAS_ITEM(desktop->drawing),
+                                        GDK_KEY_PRESS_MASK | GDK_KEY_RELEASE_MASK | GDK_BUTTON_RELEASE_MASK | GDK_BUTTON_PRESS_MASK |
+                                        GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK,
+                                        nullptr, event->button.time);
+
+                    this->grabbed = SP_CANVAS_ITEM(desktop->drawing);
+
+                    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 (!desktop->isWaitingCursor() && !this->dragging) {
+                GdkWindow* window = gtk_widget_get_window (GTK_WIDGET (desktop->getCanvas()));
+
+                gdk_window_set_cursor(window, CursorSelectMouseover);
+            }
+            break;
+        }
+        case GDK_LEAVE_NOTIFY:
+            if (!desktop->isWaitingCursor() && !this->dragging) {
+                Glib::RefPtr<Gdk::Window> window = Glib::wrap(GTK_WIDGET(desktop->getCanvas()))->get_window();
+
+                window->set_cursor(this->cursor);
+            }
+            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);
+                    ret = TRUE;
+                }
+            } else if (get_latin_keyval (&event->key) == GDK_KEY_ISO_Left_Tab) {
+                if (this->dragging && this->grabbed) {
+                    _seltrans->getNextClosestPoint(true);
+                    ret = TRUE;
+                }
+            }
+            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, bool shift_pressed) {
+    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 (shift_pressed) {
+        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();
+    }
+    desktop->canvas->forceFullRedrawAfterInterruptions(5, false);
+
+    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->setCurrentLayer(clicked_item);
+                        desktop->getSelection()->clear();
+                        this->dragging = false;
+                        sp_event_context_discard_delayed_snap_event(this);
+
+                        
+                    } else { // switch tool
+                        Geom::Point const button_pt(event->button.x, event->button.y);
+                        Geom::Point const p(desktop->w2d(button_pt));
+                        tools_switch_by_item (desktop, clicked_item, p);
+                    }
+                } else {
+                    sp_select_context_up_one_layer(desktop);
+                }
+
+                ret = TRUE;
+            }
+            break;
+
+        case GDK_BUTTON_PRESS:
+            if (event->button.button == 1 && !this->space_panning) {
+                // 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 (event->button.state & GDK_MOD1_MASK) {
+                    Inkscape::Rubberband::get(desktop)->setMode(RUBBERBAND_MODE_TOUCHPATH);
+                }
+
+                Inkscape::Rubberband::get(desktop)->start(desktop, p);
+
+                if (this->grabbed) {
+                    sp_canvas_item_ungrab(this->grabbed);
+                    this->grabbed = nullptr;
+                }
+
+                sp_canvas_item_grab(SP_CANVAS_ITEM(desktop->acetate),
+                                    GDK_KEY_PRESS_MASK | GDK_KEY_RELEASE_MASK | GDK_BUTTON_RELEASE_MASK | GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON_PRESS_MASK,
+                                    nullptr, event->button.time);
+
+                this->grabbed = SP_CANVAS_ITEM(desktop->acetate);
+
+                // remember what modifiers were on before button press
+                this->button_press_shift = (event->button.state & GDK_SHIFT_MASK) ? true : false;
+                this->button_press_ctrl = (event->button.state & GDK_CONTROL_MASK) ? true : false;
+                this->button_press_alt = (event->button.state & GDK_MOD1_MASK) ? true : false;
+
+                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:
+        {
+            tolerance = prefs->getIntLimited("/options/dragtolerance/value", 0, 0, 100);
+
+            if ((event->motion.state & GDK_BUTTON1_MASK) && !this->space_panning) {
+                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 (this->button_press_ctrl || (this->button_press_alt && !this->button_press_shift && !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;
+
+                    GdkWindow* window = gtk_widget_get_window (GTK_WIDGET (desktop->getCanvas()));
+
+                    gdk_window_set_cursor(window, CursorSelectDragging);
+                }
+
+                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();
+
+                    item_at_point = desktop->getItemAtPoint(Geom::Point(event->button.x, event->button.y), FALSE);
+
+                    if (!item_at_point) { // if no item at this point, try at the click point (bug 1012200)
+                        item_at_point = desktop->getItemAtPoint(Geom::Point(xp, yp), FALSE);
+                    }
+
+                    if (item_at_point || this->moved || this->button_press_alt) {
+                        // 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))
+                                && !this->button_press_alt) {
+                                // 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()) {
+                            sp_event_context_discard_delayed_snap_event(this);
+                            _seltrans->moveTo(p, event->button.state);
+                        }
+
+                        desktop->scroll_to_point(p);
+                        gobble_motion_events(GDK_BUTTON1_MASK);
+                        ret = TRUE;
+                    } else {
+                        this->dragging = FALSE;
+                        sp_event_context_discard_delayed_snap_event(this);
+                        
+                    }
+
+                } else {
+                    if (Inkscape::Rubberband::get(desktop)->is_started()) {
+                        Inkscape::Rubberband::get(desktop)->move(p);
+
+                        if (Inkscape::Rubberband::get(desktop)->getMode() == RUBBERBAND_MODE_TOUCHPATH) {
+                            this->defaultMessageContext()->set(Inkscape::NORMAL_MESSAGE, _("<b>Draw over</b> objects to select them; release <b>Alt</b> to switch to rubberband selection"));
+                        } else {
+                            this->defaultMessageContext()->set(Inkscape::NORMAL_MESSAGE, _("<b>Drag around</b> objects to select them; press <b>Alt</b> to switch to touch selection"));
+                        }
+
+                        gobble_motion_events(GDK_BUTTON1_MASK);
+                    }
+                }
+            }
+            break;
+        }
+        case GDK_BUTTON_RELEASE:
+            xp = yp = 0;
+
+            if ((event->button.button == 1) && (this->grabbed) && !this->space_panning) {
+                if (this->dragging) {
+                    GdkWindow* window;
+
+                    if (this->moved) {
+                        // item has been moved
+                        _seltrans->ungrab();
+                        this->moved = FALSE;
+#ifdef WITH_DBUS
+                        dbus_send_ping(desktop, this->item);
+#endif
+                    } else if (this->item && !drag_escaped) {
+                        // item has not been moved -> simply a click, do selecting
+                        if (!selection->isEmpty()) {
+                            if (event->button.state & GDK_SHIFT_MASK) {
+                                // 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;
+                    window = gtk_widget_get_window (GTK_WIDGET (desktop->getCanvas()));
+
+                    gdk_window_set_cursor(window, CursorSelectMouseover);
+                    sp_event_context_discard_delayed_snap_event(this);
+
+                    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_TOUCHPATH) {
+                            items = desktop->getDocument()->getItemsAtPoints(desktop->dkey, r->getPoints());
+                        }
+
+                        _seltrans->resetState();
+                        r->stop();
+                        this->defaultMessageContext()->clear();
+
+                        if (event->button.state & GDK_SHIFT_MASK) {
+                            // 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();
+
+                        if (this->button_press_shift && !rb_escaped && !drag_escaped) {
+                            // this was a shift+click or alt+shift+click, select what was clicked upon
+                            this->button_press_shift = false;
+
+                            if (this->button_press_ctrl) {
+                                // go into groups, honoring Alt
+                                item = sp_event_context_find_item (desktop,
+                                                   Geom::Point(event->button.x, event->button.y), event->button.state & GDK_MOD1_MASK, TRUE);
+                                this->button_press_ctrl = FALSE;
+                            } else {
+                                // don't go into groups, honoring Alt
+                                item = sp_event_context_find_item (desktop,
+                                                   Geom::Point(event->button.x, event->button.y), event->button.state & GDK_MOD1_MASK, FALSE);
+                            }
+
+                            if (item) {
+                                selection->toggle(item);
+                                item = nullptr;
+                            }
+
+                        } else if ((this->button_press_ctrl || this->button_press_alt) && !rb_escaped && !drag_escaped) { // ctrl+click, alt+click
+                            item = sp_event_context_find_item (desktop,
+                                         Geom::Point(event->button.x, event->button.y), this->button_press_alt, this->button_press_ctrl);
+
+                            this->button_press_ctrl = FALSE;
+                            this->button_press_alt = FALSE;
+
+                            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) && !(event->button.state & GDK_MOD1_MASK)) {
+                                    selection->clear();
+                                }
+
+                                rb_escaped = 0;
+                            }
+                        }
+                    }
+
+                    ret = TRUE;
+                }
+                if (this->grabbed) {
+                    sp_canvas_item_ungrab(this->grabbed);
+                    this->grabbed = nullptr;
+                }
+                // Think is not necesary now
+                // desktop->updateNow();
+            }
+
+            if (event->button.button == 1) {
+                Inkscape::Rubberband::get(desktop)->stop(); // might have been started in another tool!
+            }
+
+            this->button_press_shift = false;
+            this->button_press_ctrl = false;
+            this->button_press_alt = false;
+            break;
+
+        case GDK_SCROLL: {
+
+            GdkEventScroll *scroll_event = (GdkEventScroll*) event;
+
+            if ( ! (scroll_event->state & GDK_MOD1_MASK)) // do nothing specific if alt was not pressed
+                break;
+
+            bool shift_pressed = scroll_event->state & GDK_SHIFT_MASK;
+            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, shift_pressed);
+
+            ret = TRUE;
+
+            GtkWindow *w =GTK_WINDOW(gtk_widget_get_toplevel( GTK_WIDGET(desktop->canvas) ));
+            if (w) {
+                gtk_window_present(w);
+                gtk_widget_grab_focus (GTK_WIDGET(desktop->canvas)); 
+            }
+            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 (!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 (alt) {
+                        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 {
+                    sp_event_show_modifier_tip (this->defaultMessageContext(), event,
+                                                _("<b>Ctrl</b>: click to select in groups; drag to move hor/vert"),
+                                                _("<b>Shift</b>: click to toggle select; drag for rubberband selection"),
+                                                _("<b>Alt</b>: click to select under; scroll mouse-wheel to cycle-select; drag to move selected or select by touch"));
+                    
+                    // if Alt and nonempty selection, show moving cursor ("move selected"):
+                    if (alt && !selection->isEmpty() && !desktop->isWaitingCursor()) {
+                        GdkWindow* window = gtk_widget_get_window (GTK_WIDGET (desktop->getCanvas()));
+
+                        gdk_window_set_cursor(window, CursorSelectDragging);
+                    }
+                    //*/
+                    break;
+            }
+            }
+
+            gdouble const nudge = prefs->getDoubleLimited("/options/nudgedistance/value", 2, 0, 1000, "px"); // in px
+            gdouble const offset = prefs->getDoubleLimited("/options/defaultscale/value", 2, 0, 1000, "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->setCurrentLayer(clicked_item);
+                                desktop->getSelection()->clear();
+                            } else {
+                                this->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 (Inkscape::Rubberband::get(desktop)->is_started()) {
+                // if Alt then change cursor to moving cursor:
+                if (alt) {
+                    Inkscape::Rubberband::get(desktop)->setMode(RUBBERBAND_MODE_RECT);
+                }
+            } 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 (!desktop->isWaitingCursor()) {
+                // Do we need to reset the cursor here on key release ?
+                //GdkWindow* window = gtk_widget_get_window (GTK_WIDGET (desktop->getCanvas()));
+                //gdk_window_set_cursor(window, event_context->cursor);
+            }
+            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 :