Moved and renamed some tool-related files.

(bzr r12785)

1 files changed, 0 insertions, 1541 deletions

diff --git a/src/event-context.cpp b/src/event-context.cpp
deleted file mode 100644
index 70502ca64..000000000
--- a/src/event-context.cpp
+++ /dev/null
@@ -1,1541 +0,0 @@
-/*
- * Main event handling, and related helper functions.
- *
- * Authors:
- *   Lauris Kaplinski <lauris@kaplinski.com>
- *   Frank Felfe <innerspace@iname.com>
- *   bulia byak <buliabyak@users.sf.net>
- *   Jon A. Cruz <jon@joncruz.org>
- *   Kris De Gussem <Kris.DeGussem@gmail.com>
- *
- * Copyright (C) 1999-2012 authors
- * Copyright (C) 2001-2002 Ximian, Inc.
- *
- * Released under GNU GPL, read the file 'COPYING' for more information
- */
-
-#ifdef HAVE_CONFIG_H
-# include "config.h"
-#endif
-
-#if GLIBMM_DISABLE_DEPRECATED && HAVE_GLIBMM_THREADS_H
-#include <glibmm/threads.h>
-#endif
-
-#include "shortcuts.h"
-#include "file.h"
-#include "event-context.h"
-
-#include <string.h>
-#include <gdk/gdkkeysyms.h>
-#include <gtk/gtk.h>
-#include <glibmm/i18n.h>
-#include <cstring>
-#include <string>
-
-#include "display/sp-canvas.h"
-#include "xml/node-event-vector.h"
-#include "sp-cursor.h"
-#include "desktop.h"
-#include "desktop-handles.h"
-#include "desktop-events.h"
-#include "desktop-style.h"
-#include "widgets/desktop-widget.h"
-#include "sp-namedview.h"
-#include "selection.h"
-#include "interface.h"
-#include "macros.h"
-#include "tools-switch.h"
-#include "preferences.h"
-#include "message-context.h"
-#include "gradient-drag.h"
-#include "attributes.h"
-#include "rubberband.h"
-#include "selcue.h"
-#include "lpe-tool-context.h"
-#include "ui/tool/control-point.h"
-#include "shape-editor.h"
-#include "sp-guide.h"
-#include "color.h"
-
-// globals for temporary switching to selector by space
-static bool selector_toggled = FALSE;
-static int switch_selector_to = 0;
-
-// globals for temporary switching to dropper by 'D'
-static bool dropper_toggled = FALSE;
-static int switch_dropper_to = 0;
-
-//static gint xp = 0, yp = 0; // where drag started
-//static gint tolerance = 0;
-//static bool within_tolerance = false;
-
-// globals for keeping track of keyboard scroll events in order to accelerate
-static guint32 scroll_event_time = 0;
-static gdouble scroll_multiply = 1;
-static guint scroll_keyval = 0;
-
-
-namespace Inkscape {
-namespace UI {
-namespace Tools {
-
-static void set_event_location(SPDesktop * desktop, GdkEvent * event);
-
-
-void ToolBase::set(const Inkscape::Preferences::Entry& /*val*/) {
-}
-
-void ToolBase::activate() {
-}
-
-void ToolBase::deactivate() {
-}
-
-void ToolBase::finish() {
-	this->enableSelectionCue(false);
-}
-
-ToolBase::ToolBase() {
-	this->hot_y = 0;
-	this->xp = 0;
-	this->cursor_shape = 0;
-	this->pref_observer = 0;
-	this->hot_x = 0;
-	this->yp = 0;
-	this->within_tolerance = false;
-	this->tolerance = 0;
-	//this->key = 0;
-	this->item_to_select = 0;
-
-    this->desktop = NULL;
-    this->cursor = NULL;
-    this->message_context = NULL;
-    this->_selcue = NULL;
-    this->_grdrag = NULL;
-    this->space_panning = false;
-    this->shape_editor = NULL;
-    this->_delayed_snap_event = NULL;
-    this->_dse_callback_in_process = false;
-    //this->tool_url = NULL;
-}
-
-ToolBase::~ToolBase() {
-    if (this->message_context) {
-        delete this->message_context;
-    }
-
-    if (this->cursor != NULL) {
-#if GTK_CHECK_VERSION(3,0,0)
-        g_object_unref(this->cursor);
-#else
-        gdk_cursor_unref(this->cursor);
-#endif
-        this->cursor = NULL;
-    }
-
-    if (this->desktop) {
-        this->desktop = NULL;
-    }
-
-    if (this->pref_observer) {
-        delete this->pref_observer;
-    }
-
-    if (this->_delayed_snap_event) {
-        delete this->_delayed_snap_event;
-    }
-}
-
-
-/**
- * Set the cursor to a standard GDK cursor
- */
-static void sp_event_context_set_cursor(ToolBase *event_context, GdkCursorType cursor_type) {
-
-    GtkWidget *w = GTK_WIDGET(sp_desktop_canvas(event_context->desktop));
-    GdkDisplay *display = gdk_display_get_default();
-    GdkCursor *cursor = gdk_cursor_new_for_display(display, cursor_type);
-
-#if WITH_GTKMM_3_0
-    if (cursor) {
-          gdk_window_set_cursor (gtk_widget_get_window (w), cursor);
-          g_object_unref (cursor);
-    }
-#else
-    gdk_window_set_cursor (gtk_widget_get_window (w), cursor);
-    gdk_cursor_unref (cursor);
-#endif
-
-}
-
-/**
- * Recreates and draws cursor on desktop related to ToolBase.
- */
-void ToolBase::sp_event_context_update_cursor() {
-    GtkWidget *w = GTK_WIDGET(sp_desktop_canvas(this->desktop));
-    if (gtk_widget_get_window (w)) {
-    
-        GtkStyle *style = gtk_widget_get_style(w);
-
-        /* fixme: */
-        if (this->cursor_shape) {
-            GdkDisplay *display = gdk_display_get_default();
-            if (gdk_display_supports_cursor_alpha(display) && gdk_display_supports_cursor_color(display)) {
-                bool fillHasColor=false, strokeHasColor=false;
-                guint32 fillColor = sp_desktop_get_color_tool(this->desktop, this->getPrefsPath(), true, &fillHasColor);
-                guint32 strokeColor = sp_desktop_get_color_tool(this->desktop, this->getPrefsPath(), false, &strokeHasColor);
-                double fillOpacity = fillHasColor ? sp_desktop_get_opacity_tool(this->desktop, this->getPrefsPath(), true) : 0;
-                double strokeOpacity = strokeHasColor ? sp_desktop_get_opacity_tool(this->desktop, this->getPrefsPath(), false) : 0;
-
-                GdkPixbuf *pixbuf = sp_cursor_pixbuf_from_xpm(
-                    this->cursor_shape,
-                    style->black, style->white,
-                    SP_RGBA32_U_COMPOSE(SP_RGBA32_R_U(fillColor),SP_RGBA32_G_U(fillColor),SP_RGBA32_B_U(fillColor),SP_COLOR_F_TO_U(fillOpacity)),
-                    SP_RGBA32_U_COMPOSE(SP_RGBA32_R_U(strokeColor),SP_RGBA32_G_U(strokeColor),SP_RGBA32_B_U(strokeColor),SP_COLOR_F_TO_U(strokeOpacity))
-                    );
-                if (pixbuf != NULL) {
-                    if (this->cursor) {
-#if GTK_CHECK_VERSION(3,0,0)
-                        g_object_unref(this->cursor);
-#else
-                        gdk_cursor_unref(this->cursor);
-#endif
-                    }
-                    this->cursor = gdk_cursor_new_from_pixbuf(display, pixbuf, this->hot_x, this->hot_y);
-                    g_object_unref(pixbuf);
-                }
-            } else {
-            	GdkPixbuf *pixbuf = gdk_pixbuf_new_from_xpm_data((const gchar **)this->cursor_shape);
-
-                if (pixbuf) {
-                    if (this->cursor) {
-#if GTK_CHECK_VERSION(3,0,0)
-                        g_object_unref(this->cursor);
-#else
-                        gdk_cursor_unref(this->cursor);
-#endif
-                    }
-                    this->cursor = gdk_cursor_new_from_pixbuf(display,
-                    pixbuf, this->hot_x, this->hot_y);
-                    g_object_unref(pixbuf);
-                }
-            }
-        }
-        gdk_window_set_cursor(gtk_widget_get_window (w), this->cursor);
-        gdk_flush();
-    }
-    this->desktop->waiting_cursor = false;
-}
-
-/**
- * Callback that gets called on initialization of ToolBase object.
- * Redraws mouse cursor, at the moment.
- */
-
-/**
- * When you override it, call this method first.
- */
-void ToolBase::setup() {
-    this->pref_observer = new ToolPrefObserver(this->getPrefsPath(), this);
-    Inkscape::Preferences::get()->addObserver(*(this->pref_observer));
-
-	this->sp_event_context_update_cursor();
-}
-
-/**
- * Gobbles next key events on the queue with the same keyval and mask. Returns the number of events consumed.
- */
-gint gobble_key_events(guint keyval, gint mask) {
-    GdkEvent *event_next;
-    gint i = 0;
-
-    event_next = gdk_event_get();
-    // while the next event is also a key notify with the same keyval and mask,
-    while (event_next && (event_next->type == GDK_KEY_PRESS || event_next->type
-            == GDK_KEY_RELEASE) && event_next->key.keyval == keyval && (!mask
-            || (event_next->key.state & mask))) {
-        if (event_next->type == GDK_KEY_PRESS)
-            i++;
-        // kill it
-        gdk_event_free(event_next);
-        // get next
-        event_next = gdk_event_get();
-    }
-    // otherwise, put it back onto the queue
-    if (event_next)
-        gdk_event_put(event_next);
-
-    return i;
-}
-
-/**
- * Gobbles next motion notify events on the queue with the same mask. Returns the number of events consumed.
- */
-gint gobble_motion_events(gint mask) {
-    GdkEvent *event_next;
-    gint i = 0;
-
-    event_next = gdk_event_get();
-    // while the next event is also a key notify with the same keyval and mask,
-    while (event_next && event_next->type == GDK_MOTION_NOTIFY
-            && (event_next->motion.state & mask)) {
-        // kill it
-        gdk_event_free(event_next);
-        // get next
-        event_next = gdk_event_get();
-        i++;
-    }
-    // otherwise, put it back onto the queue
-    if (event_next)
-        gdk_event_put(event_next);
-
-    return i;
-}
-
-/**
- * Toggles current tool between active tool and selector tool.
- * Subroutine of sp_event_context_private_root_handler().
- */
-static void sp_toggle_selector(SPDesktop *dt) {
-    if (!dt->event_context)
-        return;
-
-    if (tools_isactive(dt, TOOLS_SELECT)) {
-        if (selector_toggled) {
-            if (switch_selector_to)
-                tools_switch(dt, switch_selector_to);
-            selector_toggled = FALSE;
-        } else
-            return;
-    } else {
-        selector_toggled = TRUE;
-        switch_selector_to = tools_active(dt);
-        tools_switch(dt, TOOLS_SELECT);
-    }
-}
-
-/**
- * Toggles current tool between active tool and dropper tool.
- * Subroutine of sp_event_context_private_root_handler().
- */
-void sp_toggle_dropper(SPDesktop *dt) {
-    if (!dt->event_context)
-        return;
-
-    if (tools_isactive(dt, TOOLS_DROPPER)) {
-        if (dropper_toggled) {
-            if (switch_dropper_to)
-                tools_switch(dt, switch_dropper_to);
-            dropper_toggled = FALSE;
-        } else
-            return;
-    } else {
-        dropper_toggled = TRUE;
-        switch_dropper_to = tools_active(dt);
-        tools_switch(dt, TOOLS_DROPPER);
-    }
-}
-
-/**
- * Calculates and keeps track of scroll acceleration.
- * Subroutine of sp_event_context_private_root_handler().
- */
-static gdouble accelerate_scroll(GdkEvent *event, gdouble acceleration,
-        SPCanvas */*canvas*/) {
-    guint32 time_diff = ((GdkEventKey *) event)->time - scroll_event_time;
-
-    /* key pressed within 500ms ? (1/2 second) */
-    if (time_diff > 500 || event->key.keyval != scroll_keyval) {
-        scroll_multiply = 1; // abort acceleration
-    } else {
-        scroll_multiply += acceleration; // continue acceleration
-    }
-
-    scroll_event_time = ((GdkEventKey *) event)->time;
-    scroll_keyval = event->key.keyval;
-
-    return scroll_multiply;
-}
-
-/**
- * Main event dispatch, gets called from Gdk.
- */
-//static gint sp_event_context_private_root_handler(
-//        ToolBase *event_context, GdkEvent *event) {
-//
-//	return event_context->ceventcontext->root_handler(event);
-//}
-
-bool ToolBase::root_handler(GdkEvent* event) {
-    static Geom::Point button_w;
-    static unsigned int panning = 0;
-    static unsigned int panning_cursor = 0;
-    static unsigned int zoom_rb = 0;
-
-    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
-
-    /// @todo REmove redundant /value in preference keys
-    tolerance = prefs->getIntLimited("/options/dragtolerance/value", 0, 0, 100);
-
-    gint ret = FALSE;
-
-    switch (event->type) {
-    case GDK_2BUTTON_PRESS:
-        if (panning) {
-            panning = 0;
-            sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate), event->button.time);
-            ret = TRUE;
-        } else {
-            /* sp_desktop_dialog(); */
-        }
-        break;
-
-    case GDK_BUTTON_PRESS:
-        // save drag origin
-        xp = (gint) event->button.x;
-        yp = (gint) event->button.y;
-        within_tolerance = true;
-
-        button_w = Geom::Point(event->button.x, event->button.y);
-
-        switch (event->button.button) {
-        case 1:
-            if (this->space_panning) {
-                // When starting panning, make sure there are no snap events pending because these might disable the panning again
-                sp_event_context_discard_delayed_snap_event(this);
-                panning = 1;
-
-                sp_canvas_item_grab(SP_CANVAS_ITEM(desktop->acetate),
-                        GDK_KEY_RELEASE_MASK | GDK_BUTTON_RELEASE_MASK
-                                | GDK_POINTER_MOTION_MASK
-                                | GDK_POINTER_MOTION_HINT_MASK, NULL,
-                        event->button.time - 1);
-
-                ret = TRUE;
-            }
-            break;
-
-        case 2:
-            if (event->button.state & GDK_SHIFT_MASK) {
-                zoom_rb = 2;
-            } else {
-                // When starting panning, make sure there are no snap events pending because these might disable the panning again
-                sp_event_context_discard_delayed_snap_event(this);
-                panning = 2;
-
-                sp_canvas_item_grab(SP_CANVAS_ITEM(desktop->acetate),
-                        GDK_BUTTON_RELEASE_MASK | GDK_POINTER_MOTION_MASK
-                                | GDK_POINTER_MOTION_HINT_MASK, NULL,
-                        event->button.time - 1);
-
-            }
-
-            ret = TRUE;
-            break;
-
-        case 3:
-            if ((event->button.state & GDK_SHIFT_MASK) || (event->button.state & GDK_CONTROL_MASK)) {
-                // When starting panning, make sure there are no snap events pending because these might disable the panning again
-                sp_event_context_discard_delayed_snap_event(this);
-                panning = 3;
-
-                sp_canvas_item_grab(SP_CANVAS_ITEM(desktop->acetate),
-                        GDK_BUTTON_RELEASE_MASK | GDK_POINTER_MOTION_MASK
-                                | GDK_POINTER_MOTION_HINT_MASK, NULL,
-                        event->button.time);
-
-                ret = TRUE;
-            } else {
-                sp_event_root_menu_popup(desktop, NULL, event);
-            }
-            break;
-
-        default:
-            break;
-        }
-        break;
-
-    case GDK_MOTION_NOTIFY:
-        if (panning) {
-            if (panning == 4 && !xp && !yp ) {
-                // <Space> + mouse panning started, save location and grab canvas
-                xp = event->motion.x;
-                yp = event->motion.y;
-                button_w = Geom::Point(event->motion.x, event->motion.y);
-
-                sp_canvas_item_grab(SP_CANVAS_ITEM(desktop->acetate),
-                        GDK_KEY_RELEASE_MASK | GDK_BUTTON_RELEASE_MASK
-                                | GDK_POINTER_MOTION_MASK
-                                | GDK_POINTER_MOTION_HINT_MASK, NULL,
-                        event->motion.time - 1);
-            }
-
-            if ((panning == 2 && !(event->motion.state & GDK_BUTTON2_MASK))
-                    || (panning == 1 && !(event->motion.state & GDK_BUTTON1_MASK))
-                    || (panning == 3 && !(event->motion.state & GDK_BUTTON3_MASK))) {
-                /* Gdk seems to lose button release for us sometimes :-( */
-                panning = 0;
-                sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate), event->button.time);
-                ret = TRUE;
-            } else {
-                if (within_tolerance && (abs((gint) event->motion.x - xp)
-                        < tolerance) && (abs((gint) event->motion.y - yp)
-                        < tolerance)) {
-                    // do not drag if we're within tolerance from origin
-                    break;
-                }
-
-                // 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;
-
-                // gobble subsequent motion events to prevent "sticking"
-                // when scrolling is slow
-                gobble_motion_events(panning == 2 ? GDK_BUTTON2_MASK : (panning
-                        == 1 ? GDK_BUTTON1_MASK : GDK_BUTTON3_MASK));
-
-                if (panning_cursor == 0) {
-                    panning_cursor = 1;
-                    sp_event_context_set_cursor(this, GDK_FLEUR);
-                }
-
-                Geom::Point const motion_w(event->motion.x, event->motion.y);
-                Geom::Point const moved_w(motion_w - button_w);
-                this->desktop->scroll_world(moved_w, true); // we're still scrolling, do not redraw
-                ret = TRUE;
-            }
-        } else if (zoom_rb) {
-            Geom::Point const motion_w(event->motion.x, event->motion.y);
-            Geom::Point const motion_dt(desktop->w2d(motion_w));
-
-            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 (Inkscape::Rubberband::get(desktop)->is_started()) {
-                Inkscape::Rubberband::get(desktop)->move(motion_dt);
-            } else {
-                Inkscape::Rubberband::get(desktop)->start(desktop, motion_dt);
-            }
-
-            if (zoom_rb == 2) {
-                gobble_motion_events(GDK_BUTTON2_MASK);
-            }
-        }
-        break;
-
-    case GDK_BUTTON_RELEASE:
-        xp = yp = 0;
-
-        if (panning_cursor == 1) {
-            panning_cursor = 0;
-            GtkWidget *w = GTK_WIDGET(sp_desktop_canvas(this->desktop));
-            gdk_window_set_cursor(gtk_widget_get_window (w), this->cursor);
-        }
-
-        if (within_tolerance && (panning || zoom_rb)) {
-            zoom_rb = 0;
-
-            if (panning) {
-                panning = 0;
-                sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate),
-                        event->button.time);
-            }
-
-            Geom::Point const event_w(event->button.x, event->button.y);
-            Geom::Point const event_dt(desktop->w2d(event_w));
-
-            double const zoom_inc = prefs->getDoubleLimited(
-                    "/options/zoomincrement/value", M_SQRT2, 1.01, 10);
-
-            desktop->zoom_relative_keep_point(event_dt, (event->button.state
-                    & GDK_SHIFT_MASK) ? 1 / zoom_inc : zoom_inc);
-
-            desktop->updateNow();
-            ret = TRUE;
-        } else if (panning == event->button.button) {
-            panning = 0;
-            sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate),
-                    event->button.time);
-
-            // in slow complex drawings, some of the motion events are lost;
-            // to make up for this, we scroll it once again to the button-up event coordinates
-            // (i.e. canvas will always get scrolled all the way to the mouse release point,
-            // even if few intermediate steps were visible)
-            Geom::Point const motion_w(event->button.x, event->button.y);
-            Geom::Point const moved_w(motion_w - button_w);
-
-            this->desktop->scroll_world(moved_w);
-            desktop->updateNow();
-            ret = TRUE;
-        } else if (zoom_rb == event->button.button) {
-            zoom_rb = 0;
-
-            Geom::OptRect const b = Inkscape::Rubberband::get(desktop)->getRectangle();
-            Inkscape::Rubberband::get(desktop)->stop();
-
-            if (b && !within_tolerance) {
-                desktop->set_display_area(*b, 10);
-            }
-
-            ret = TRUE;
-        }
-        break;
-
-    case GDK_KEY_PRESS: {
-        double const acceleration = prefs->getDoubleLimited(
-                "/options/scrollingacceleration/value", 0, 0, 6);
-
-        int const key_scroll = prefs->getIntLimited("/options/keyscroll/value",
-                10, 0, 1000);
-
-        switch (get_group0_keyval(&event->key)) {
-        // GDK insists on stealing these keys (F1 for no idea what, tab for cycling widgets
-        // in the editing window). So we resteal them back and run our regular shortcut
-        // invoker on them.
-        unsigned int shortcut;
-        case GDK_KEY_Tab:
-        case GDK_KEY_ISO_Left_Tab:
-        case GDK_KEY_F1:
-            shortcut = get_group0_keyval(&event->key);
-
-            if (event->key.state & GDK_SHIFT_MASK) {
-                shortcut |= SP_SHORTCUT_SHIFT_MASK;
-            }
-
-            if (event->key.state & GDK_CONTROL_MASK) {
-                shortcut |= SP_SHORTCUT_CONTROL_MASK;
-            }
-
-            if (event->key.state & GDK_MOD1_MASK) {
-                shortcut |= SP_SHORTCUT_ALT_MASK;
-            }
-
-            ret = sp_shortcut_invoke(shortcut, desktop);
-            break;
-
-        case GDK_KEY_Q:
-        case GDK_KEY_q:
-            if (desktop->quick_zoomed()) {
-                ret = TRUE;
-            }
-            if (!MOD__SHIFT(event) && !MOD__CTRL(event) && !MOD__ALT(event)) {
-                desktop->zoom_quick(true);
-                ret = TRUE;
-            }
-            break;
-
-        case GDK_KEY_W:
-        case GDK_KEY_w:
-        case GDK_KEY_F4:
-            /* Close view */
-            if (MOD__CTRL_ONLY(event)) {
-                sp_ui_close_view(NULL);
-                ret = TRUE;
-            }
-            break;
-
-        case GDK_KEY_Left: // Ctrl Left
-        case GDK_KEY_KP_Left:
-        case GDK_KEY_KP_4:
-            if (MOD__CTRL_ONLY(event)) {
-                int i = (int) floor(key_scroll * accelerate_scroll(event,
-                        acceleration, sp_desktop_canvas(desktop)));
-
-                gobble_key_events(get_group0_keyval(&event->key), GDK_CONTROL_MASK);
-                this->desktop->scroll_world(i, 0);
-                ret = TRUE;
-            }
-            break;
-
-        case GDK_KEY_Up: // Ctrl Up
-        case GDK_KEY_KP_Up:
-        case GDK_KEY_KP_8:
-            if (MOD__CTRL_ONLY(event)) {
-                int i = (int) floor(key_scroll * accelerate_scroll(event,
-                        acceleration, sp_desktop_canvas(desktop)));
-
-                gobble_key_events(get_group0_keyval(&event->key), GDK_CONTROL_MASK);
-                this->desktop->scroll_world(0, i);
-                ret = TRUE;
-            }
-            break;
-
-        case GDK_KEY_Right: // Ctrl Right
-        case GDK_KEY_KP_Right:
-        case GDK_KEY_KP_6:
-            if (MOD__CTRL_ONLY(event)) {
-                int i = (int) floor(key_scroll * accelerate_scroll(event,
-                        acceleration, sp_desktop_canvas(desktop)));
-
-                gobble_key_events(get_group0_keyval(&event->key), GDK_CONTROL_MASK);
-                this->desktop->scroll_world(-i, 0);
-                ret = TRUE;
-            }
-            break;
-
-        case GDK_KEY_Down: // Ctrl Down
-        case GDK_KEY_KP_Down:
-        case GDK_KEY_KP_2:
-            if (MOD__CTRL_ONLY(event)) {
-                int i = (int) floor(key_scroll * accelerate_scroll(event,
-                        acceleration, sp_desktop_canvas(desktop)));
-
-                gobble_key_events(get_group0_keyval(&event->key), GDK_CONTROL_MASK);
-                this->desktop->scroll_world(0, -i);
-                ret = TRUE;
-            }
-            break;
-
-        case GDK_KEY_F10:
-            if (MOD__SHIFT_ONLY(event)) {
-                sp_event_root_menu_popup(desktop, NULL, event);
-                ret = TRUE;
-            }
-            break;
-
-        case GDK_KEY_space:
-            xp = yp = 0;
-            within_tolerance = true;
-            panning = 4;
-
-            this->space_panning = true;
-            this->message_context->set(Inkscape::INFORMATION_MESSAGE,
-                    _("<b>Space+mouse move</b> to pan canvas"));
-
-            ret = TRUE;
-            break;
-
-        case GDK_KEY_z:
-        case GDK_KEY_Z:
-            if (MOD__ALT_ONLY(event)) {
-                desktop->zoom_grab_focus();
-                ret = TRUE;
-            }
-            break;
-
-        default:
-            break;
-            }
-        }
-        break;
-
-    case GDK_KEY_RELEASE:
-        // Stop panning on any key release
-        if (this->space_panning) {
-            this->space_panning = false;
-            this->message_context->clear();
-        }
-
-        if (panning) {
-            panning = 0;
-            xp = yp = 0;
-
-            sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate),
-                    event->key.time);
-
-            desktop->updateNow();
-        }
-
-        if (panning_cursor == 1) {
-            panning_cursor = 0;
-            GtkWidget *w = GTK_WIDGET(sp_desktop_canvas(this->desktop));
-            gdk_window_set_cursor(gtk_widget_get_window (w), this->cursor);
-        }
-
-        switch (get_group0_keyval(&event->key)) {
-        case GDK_KEY_space:
-            if (within_tolerance == true) {
-                // Space was pressed, but not panned
-                sp_toggle_selector(desktop);
-                ret = TRUE;
-            }
-
-            within_tolerance = false;
-            break;
-
-        case GDK_KEY_Q:
-        case GDK_KEY_q:
-            if (desktop->quick_zoomed()) {
-                desktop->zoom_quick(false);
-                ret = TRUE;
-            }
-            break;
-
-        default:
-            break;
-        }
-        break;
-
-    case GDK_SCROLL: {
-        bool ctrl = (event->scroll.state & GDK_CONTROL_MASK);
-        bool wheelzooms = prefs->getBool("/options/wheelzooms/value");
-
-        int const wheel_scroll = prefs->getIntLimited(
-                "/options/wheelscroll/value", 40, 0, 1000);
-
-#if GTK_CHECK_VERSION(3,0,0)
-        // Size of smooth-scrolls (only used in GTK+ 3)
-        gdouble delta_x = 0;
-        gdouble delta_y = 0;
-#endif
-
-        /* shift + wheel, pan left--right */
-        if (event->scroll.state & GDK_SHIFT_MASK) {
-            switch (event->scroll.direction) {
-            case GDK_SCROLL_UP:
-                desktop->scroll_world(wheel_scroll, 0);
-                break;
-
-            case GDK_SCROLL_DOWN:
-                desktop->scroll_world(-wheel_scroll, 0);
-                break;
-
-            default:
-                break;
-            }
-
-            /* ctrl + wheel, zoom in--out */
-        } else if ((ctrl && !wheelzooms) || (!ctrl && wheelzooms)) {
-            double rel_zoom;
-            double const zoom_inc = prefs->getDoubleLimited(
-                    "/options/zoomincrement/value", M_SQRT2, 1.01, 10);
-
-            switch (event->scroll.direction) {
-            case GDK_SCROLL_UP:
-                rel_zoom = zoom_inc;
-                break;
-
-            case GDK_SCROLL_DOWN:
-                rel_zoom = 1 / zoom_inc;
-                break;
-
-            default:
-                rel_zoom = 0.0;
-                break;
-            }
-
-            if (rel_zoom != 0.0) {
-                Geom::Point const scroll_dt = desktop->point();
-                desktop->zoom_relative_keep_point(scroll_dt, rel_zoom);
-            }
-
-            /* no modifier, pan up--down (left--right on multiwheel mice?) */
-        } else {
-            switch (event->scroll.direction) {
-            case GDK_SCROLL_UP:
-                desktop->scroll_world(0, wheel_scroll);
-                break;
-
-            case GDK_SCROLL_DOWN:
-                desktop->scroll_world(0, -wheel_scroll);
-                break;
-
-            case GDK_SCROLL_LEFT:
-                desktop->scroll_world(wheel_scroll, 0);
-                break;
-
-            case GDK_SCROLL_RIGHT:
-                desktop->scroll_world(-wheel_scroll, 0);
-                break;
-
-#if GTK_CHECK_VERSION(3,0,0)
-            case GDK_SCROLL_SMOOTH:
-                gdk_event_get_scroll_deltas(event, &delta_x, &delta_y);
-                desktop->scroll_world(delta_x, delta_y);
-                break;
-#endif
-            }
-        }
-        break;
-    }
-    default:
-        break;
-    }
-
-    return ret;
-}
-
-/**
- * Handles item specific events. Gets called from Gdk.
- *
- * Only reacts to right mouse button at the moment.
- * \todo Fixme: do context sensitive popup menu on items.
- */
-//gint sp_event_context_private_item_handler(ToolBase *ec, SPItem *item,
-//        GdkEvent *event) {
-//
-//	return ec->ceventcontext->item_handler(item, event);
-//}
-
-bool ToolBase::item_handler(SPItem* item, GdkEvent* event) {
-    int ret = FALSE;
-
-    switch (event->type) {
-    case GDK_BUTTON_PRESS:
-        if ((event->button.button == 3) && !((event->button.state & GDK_SHIFT_MASK) || (event->button.state & GDK_CONTROL_MASK))) {
-            sp_event_root_menu_popup(this->desktop, item, event);
-            ret = TRUE;
-        }
-        break;
-
-    default:
-        break;
-    }
-
-    return ret;
-}
-
-/**
- * Returns true if we're hovering above a knot (needed because we don't want to pre-snap in that case).
- */
-bool sp_event_context_knot_mouseover(ToolBase *ec)
-{
-    if (ec->shape_editor) {
-        return ec->shape_editor->knot_mouseover();
-    }
-
-    return false;
-}
-
-/**
- * Creates new ToolBase object and calls its virtual setup() function.
- * @todo This is bogus. pref_path should be a private property of the inheriting objects.
- */
-//ToolBase *
-//sp_event_context_new(GType type, SPDesktop *desktop, gchar const *pref_path,
-//        unsigned int key) {
-//    g_return_val_if_fail(g_type_is_a(type, SP_TYPE_EVENT_CONTEXT), NULL);
-//    g_return_val_if_fail(desktop != NULL, NULL);
-//
-//    ToolBase * const ec = static_cast<ToolBase*>(g_object_new(type, NULL));
-//
-//    ec->desktop = desktop;
-//    ec->_message_context
-//            = new Inkscape::MessageContext(desktop->messageStack());
-//    ec->key = key;
-//    ec->pref_observer = NULL;
-//
-//    if (pref_path) {
-//        ec->pref_observer = new ToolPrefObserver(pref_path, ec);
-//
-//        Inkscape::Preferences *prefs = Inkscape::Preferences::get();
-//        prefs->addObserver(*(ec->pref_observer));
-//    }
-//
-////    if ((SP_EVENT_CONTEXT_CLASS(G_OBJECT_GET_CLASS(ec)))->setup)
-////        (SP_EVENT_CONTEXT_CLASS(G_OBJECT_GET_CLASS(ec)))->setup(ec);
-//    ec->ceventcontext->setup();
-//
-//    return ec;
-//}
-
-/**
- * Finishes ToolBase.
- */
-//void sp_event_context_finish(ToolBase *ec) {
-//    g_return_if_fail(ec != NULL);
-//    g_return_if_fail(SP_IS_EVENT_CONTEXT(ec));
-//
-//    ec->enableSelectionCue(false);
-//
-////    if (ec->next) {
-////        g_warning("Finishing event context with active link\n");
-////    }
-//
-////    if ((SP_EVENT_CONTEXT_CLASS(G_OBJECT_GET_CLASS(ec)))->finish)
-////        (SP_EVENT_CONTEXT_CLASS(G_OBJECT_GET_CLASS(ec)))->finish(ec);
-//    ec->finish();
-//}
-
-//-------------------------------member functions
-
-/**
- * Enables/disables the ToolBase's SelCue.
- */
-void ToolBase::enableSelectionCue(bool enable) {
-    if (enable) {
-        if (!_selcue) {
-            _selcue = new Inkscape::SelCue(desktop);
-        }
-    } else {
-        delete _selcue;
-        _selcue = NULL;
-    }
-}
-
-/**
- * Enables/disables the ToolBase's GrDrag.
- */
-void ToolBase::enableGrDrag(bool enable) {
-    if (enable) {
-        if (!_grdrag) {
-            _grdrag = new GrDrag(desktop);
-        }
-    } else {
-        if (_grdrag) {
-            delete _grdrag;
-            _grdrag = NULL;
-        }
-    }
-}
-
-/**
- * Delete a selected GrDrag point
- */
-bool ToolBase::deleteSelectedDrag(bool just_one) {
-
-    if (_grdrag && _grdrag->selected) {
-        _grdrag->deleteSelected(just_one);
-        return TRUE;
-    }
-
-    return FALSE;
-}
-
-/**
- * Calls virtual set() function of ToolBase.
- */
-void sp_event_context_read(ToolBase *ec, gchar const *key) {
-    g_return_if_fail(ec != NULL);
-    g_return_if_fail(SP_IS_EVENT_CONTEXT(ec));
-    g_return_if_fail(key != NULL);
-
-//    if ((SP_EVENT_CONTEXT_CLASS(G_OBJECT_GET_CLASS(ec)))->set) {
-//        Inkscape::Preferences *prefs = Inkscape::Preferences::get();
-//        Inkscape::Preferences::Entry val = prefs->getEntry(
-//                ec->pref_observer->observed_path + '/' + key);
-//        (SP_EVENT_CONTEXT_CLASS(G_OBJECT_GET_CLASS(ec)))->set(ec, &val);
-//    }
-
-    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
-    Inkscape::Preferences::Entry val = prefs->getEntry(ec->pref_observer->observed_path + '/' + key);
-    ec->set(val);
-}
-
-/**
- * Calls virtual activate() function of ToolBase.
- */
-void sp_event_context_activate(ToolBase *ec) {
-    g_return_if_fail(ec != NULL);
-    g_return_if_fail(SP_IS_EVENT_CONTEXT(ec));
-
-    // Make sure no delayed snapping events are carried over after switching contexts
-    // (this is only an additional safety measure against sloppy coding, because each
-    // context should take care of this by itself.
-    sp_event_context_discard_delayed_snap_event(ec);
-
-//    if ((SP_EVENT_CONTEXT_CLASS(G_OBJECT_GET_CLASS(ec)))->activate)
-//        (SP_EVENT_CONTEXT_CLASS(G_OBJECT_GET_CLASS(ec)))->activate(ec);
-    ec->activate();
-}
-
-/**
- * Calls virtual deactivate() function of ToolBase.
- */
-//void sp_event_context_deactivate(ToolBase *ec) {
-//    g_return_if_fail(ec != NULL);
-//    g_return_if_fail(SP_IS_EVENT_CONTEXT(ec));
-//
-////    if ((SP_EVENT_CONTEXT_CLASS(G_OBJECT_GET_CLASS(ec)))->deactivate)
-////        (SP_EVENT_CONTEXT_CLASS(G_OBJECT_GET_CLASS(ec)))->deactivate(ec);
-//    ec->deactivate();
-//}
-
-/**
- * Calls virtual root_handler(), the main event handling function.
- */
-gint sp_event_context_root_handler(ToolBase * event_context,
-        GdkEvent * event)
-{
-    switch (event->type) {
-    case GDK_MOTION_NOTIFY:
-        sp_event_context_snap_delay_handler(event_context, NULL, NULL,
-                (GdkEventMotion *) event,
-                DelayedSnapEvent::EVENTCONTEXT_ROOT_HANDLER);
-        break;
-    case GDK_BUTTON_RELEASE:
-        if (event_context && event_context->_delayed_snap_event) {
-            // If we have any pending snapping action, then invoke it now
-            sp_event_context_snap_watchdog_callback(
-                    event_context->_delayed_snap_event);
-        }
-        break;
-    case GDK_BUTTON_PRESS:
-    case GDK_2BUTTON_PRESS:
-    case GDK_3BUTTON_PRESS:
-        // Snapping will be on hold if we're moving the mouse at high speeds. When starting
-        // drawing a new shape we really should snap though.
-        event_context->desktop->namedview->snap_manager.snapprefs.setSnapPostponedGlobally(
-                false);
-        break;
-    default:
-        break;
-    }
-
-    return sp_event_context_virtual_root_handler(event_context, event);
-}
-
-gint sp_event_context_virtual_root_handler(ToolBase * event_context, GdkEvent * event) {
-    gint ret = false;
-    if (event_context) {    // If no event-context is available then do nothing, otherwise Inkscape would crash
-                            // (see the comment in SPDesktop::set_event_context, and bug LP #622350)
-        //ret = (SP_EVENT_CONTEXT_CLASS(G_OBJECT_GET_CLASS(event_context)))->root_handler(event_context, event);
-    	ret = event_context->root_handler(event);
-
-        set_event_location(event_context->desktop, event);
-    }
-    return ret;
-}
-
-/**
- * Calls virtual item_handler(), the item event handling function.
- */
-gint sp_event_context_item_handler(ToolBase * event_context,
-        SPItem * item, GdkEvent * event) {
-    switch (event->type) {
-    case GDK_MOTION_NOTIFY:
-        sp_event_context_snap_delay_handler(event_context, (gpointer) item, NULL, (GdkEventMotion *) event, DelayedSnapEvent::EVENTCONTEXT_ITEM_HANDLER);
-        break;
-    case GDK_BUTTON_RELEASE:
-        if (event_context && event_context->_delayed_snap_event) {
-            // If we have any pending snapping action, then invoke it now
-            sp_event_context_snap_watchdog_callback(event_context->_delayed_snap_event);
-        }
-        break;
-    case GDK_BUTTON_PRESS:
-    case GDK_2BUTTON_PRESS:
-    case GDK_3BUTTON_PRESS:
-        // Snapping will be on hold if we're moving the mouse at high speeds. When starting
-        // drawing a new shape we really should snap though.
-        event_context->desktop->namedview->snap_manager.snapprefs.setSnapPostponedGlobally(false);
-        break;
-    default:
-        break;
-    }
-
-    return sp_event_context_virtual_item_handler(event_context, item, event);
-}
-
-gint sp_event_context_virtual_item_handler(ToolBase * event_context, SPItem * item, GdkEvent * event) {
-    gint ret = false;
-    if (event_context) {    // If no event-context is available then do nothing, otherwise Inkscape would crash
-                            // (see the comment in SPDesktop::set_event_context, and bug LP #622350)
-        //ret = (SP_EVENT_CONTEXT_CLASS(G_OBJECT_GET_CLASS(event_context)))->item_handler(event_context, item, event);
-    	ret = event_context->item_handler(item, event);
-
-        if (!ret) {
-            ret = sp_event_context_virtual_root_handler(event_context, event);
-        } else {
-            set_event_location(event_context->desktop, event);
-        }
-    }
-
-    return ret;
-}
-
-/**
- * Shows coordinates on status bar.
- */
-static void set_event_location(SPDesktop *desktop, GdkEvent *event) {
-    if (event->type != GDK_MOTION_NOTIFY) {
-        return;
-    }
-
-    Geom::Point const button_w(event->button.x, event->button.y);
-    Geom::Point const button_dt(desktop->w2d(button_w));
-    desktop->set_coordinate_status(button_dt);
-}
-
-//-------------------------------------------------------------------
-/**
- * Create popup menu and tell Gtk to show it.
- */
-void sp_event_root_menu_popup(SPDesktop *desktop, SPItem *item, GdkEvent *event) {
-
-    // It seems the param item is the SPItem at the bottom of the z-order
-    // Using the same function call used on left click in sp_select_context_item_handler() to get top of z-order
-    // fixme: sp_canvas_arena should set the top z-order object as arena->active
-    item = sp_event_context_find_item (desktop,
-                              Geom::Point(event->button.x, event->button.y), FALSE, FALSE);
-
-    /* fixme: This is not what I want but works for now (Lauris) */
-    if (event->type == GDK_KEY_PRESS) {
-        item = sp_desktop_selection(desktop)->singleItem();
-    }
-
-    ContextMenu* CM = new ContextMenu(desktop, item);
-    CM->show();
-
-    switch (event->type) {
-    case GDK_BUTTON_PRESS:
-        CM->popup(event->button.button, event->button.time);
-        break;
-    case GDK_KEY_PRESS:
-        CM->popup(0, event->key.time);
-        break;
-    default:
-        break;
-    }
-}
-
-/**
- * Show tool context specific modifier tip.
- */
-void sp_event_show_modifier_tip(Inkscape::MessageContext *message_context,
-        GdkEvent *event, gchar const *ctrl_tip, gchar const *shift_tip,
-        gchar const *alt_tip) {
-    guint keyval = get_group0_keyval(&event->key);
-
-    bool ctrl = ctrl_tip && (MOD__CTRL(event) || (keyval == GDK_KEY_Control_L) || (keyval
-            == GDK_KEY_Control_R));
-    bool shift = shift_tip && (MOD__SHIFT(event) || (keyval == GDK_KEY_Shift_L) || (keyval
-            == GDK_KEY_Shift_R));
-    bool alt = alt_tip && (MOD__ALT(event) || (keyval == GDK_KEY_Alt_L) || (keyval
-            == GDK_KEY_Alt_R) || (keyval == GDK_KEY_Meta_L) || (keyval == GDK_KEY_Meta_R));
-
-    gchar *tip = g_strdup_printf("%s%s%s%s%s", (ctrl ? ctrl_tip : ""), (ctrl
-            && (shift || alt) ? "; " : ""), (shift ? shift_tip : ""), ((ctrl
-            || shift) && alt ? "; " : ""), (alt ? alt_tip : ""));
-
-    if (strlen(tip) > 0) {
-        message_context->flash(Inkscape::INFORMATION_MESSAGE, tip);
-    }
-
-    g_free(tip);
-}
-
-/**
- * Return the keyval corresponding to the key event in group 0, i.e.,
- * in the main (English) layout.
- *
- * Use this instead of simply event->keyval, so that your keyboard shortcuts
- * work regardless of layouts (e.g., in Cyrillic).
- */
-guint get_group0_keyval(GdkEventKey *event) {
-    guint keyval = 0;
-
-    gdk_keymap_translate_keyboard_state(gdk_keymap_get_for_display(
-            gdk_display_get_default()), event->hardware_keycode,
-            (GdkModifierType) event->state, 0 /*event->key.group*/, &keyval,
-            NULL, NULL, NULL);
-
-    return keyval;
-}
-
-/**
- * Returns item at point p in desktop.
- *
- * If state includes alt key mask, cyclically selects under; honors
- * into_groups.
- */
-SPItem *sp_event_context_find_item(SPDesktop *desktop, Geom::Point const &p,
-                                   bool select_under, bool into_groups)
-{
-    SPItem *item = 0;
-
-    if (select_under) {
-        SPItem *selected_at_point = desktop->getItemFromListAtPointBottom(
-                desktop->selection->itemList(), p);
-        item = desktop->getItemAtPoint(p, into_groups, selected_at_point);
-        if (item == NULL) { // we may have reached bottom, flip over to the top
-            item = desktop->getItemAtPoint(p, into_groups, NULL);
-        }
-    } else {
-        item = desktop->getItemAtPoint(p, into_groups, NULL);
-    }
-
-    return item;
-}
-
-/**
- * Returns item if it is under point p in desktop, at any depth; otherwise returns NULL.
- *
- * Honors into_groups.
- */
-SPItem *
-sp_event_context_over_item(SPDesktop *desktop, SPItem *item,
-        Geom::Point const &p) {
-    GSList *temp = NULL;
-    temp = g_slist_prepend(temp, item);
-    SPItem *item_at_point = desktop->getItemFromListAtPointBottom(temp, p);
-    g_slist_free(temp);
-
-    return item_at_point;
-}
-
-ShapeEditor *
-sp_event_context_get_shape_editor(ToolBase *ec) {
-    return ec->shape_editor;
-}
-
-void event_context_print_event_info(GdkEvent *event, bool print_return) {
-    switch (event->type) {
-    case GDK_BUTTON_PRESS:
-        g_print("GDK_BUTTON_PRESS");
-        break;
-    case GDK_2BUTTON_PRESS:
-        g_print("GDK_2BUTTON_PRESS");
-        break;
-    case GDK_3BUTTON_PRESS:
-        g_print("GDK_3BUTTON_PRESS");
-        break;
-
-    case GDK_MOTION_NOTIFY:
-        g_print("GDK_MOTION_NOTIFY");
-        break;
-    case GDK_ENTER_NOTIFY:
-        g_print("GDK_ENTER_NOTIFY");
-        break;
-
-    case GDK_LEAVE_NOTIFY:
-        g_print("GDK_LEAVE_NOTIFY");
-        break;
-    case GDK_BUTTON_RELEASE:
-        g_print("GDK_BUTTON_RELEASE");
-        break;
-
-    case GDK_KEY_PRESS:
-        g_print("GDK_KEY_PRESS: %d", get_group0_keyval(&event->key));
-        break;
-    case GDK_KEY_RELEASE:
-        g_print("GDK_KEY_RELEASE: %d", get_group0_keyval(&event->key));
-        break;
-    default:
-        //g_print ("even type not recognized");
-        break;
-    }
-
-    if (print_return) {
-        g_print("\n");
-    }
-}
-
-/**
- * Analyses the current event, calculates the mouse speed, turns snapping off (temporarily) if the
- * mouse speed is above a threshold, and stores the current event such that it can be re-triggered when needed
- * (re-triggering is controlled by a watchdog timer).
- *
- * @param ec Pointer to the event context.
- * @param dse_item Pointer that store a reference to a canvas or to an item.
- * @param dse_item2 Another pointer, storing a reference to a knot or controlpoint.
- * @param event Pointer to the motion event.
- * @param origin Identifier (enum) specifying where the delay (and the call to this method) were initiated.
- */
-void sp_event_context_snap_delay_handler(ToolBase *ec,
-        gpointer const dse_item, gpointer const dse_item2, GdkEventMotion *event,
-        DelayedSnapEvent::DelayedSnapEventOrigin origin)
-{
-    static guint32 prev_time;
-    static boost::optional<Geom::Point> prev_pos;
-
-    if (ec->_dse_callback_in_process) {
-        return;
-    }
-
-    // Snapping occurs when dragging with the left mouse button down, or when hovering e.g. in the pen tool with left mouse button up
-    bool const c1 = event->state & GDK_BUTTON2_MASK; // We shouldn't hold back any events when other mouse buttons have been
-    bool const c2 = event->state & GDK_BUTTON3_MASK; // pressed, e.g. when scrolling with the middle mouse button; if we do then
-    // Inkscape will get stuck in an unresponsive state
-    bool const c3 = tools_isactive(ec->desktop, TOOLS_CALLIGRAPHIC);
-    // The snap delay will repeat the last motion event, which will lead to
-    // erroneous points in the calligraphy context. And because we don't snap
-    // in this context, we might just as well disable the snap delay all together
-
-    if (c1 || c2 || c3) {
-        // Make sure that we don't send any pending snap events to a context if we know in advance
-        // that we're not going to snap any way (e.g. while scrolling with middle mouse button)
-        // Any motion event might affect the state of the context, leading to unexpected behavior
-        sp_event_context_discard_delayed_snap_event(ec);
-    } else if (ec->desktop
-            && ec->desktop->namedview->snap_manager.snapprefs.getSnapEnabledGlobally()) {
-        // Snap when speed drops below e.g. 0.02 px/msec, or when no motion events have occurred for some period.
-        // i.e. snap when we're at stand still. A speed threshold enforces snapping for tablets, which might never
-        // be fully at stand still and might keep spitting out motion events.
-        ec->desktop->namedview->snap_manager.snapprefs.setSnapPostponedGlobally(true); // put snapping on hold
-
-        Geom::Point event_pos(event->x, event->y);
-        guint32 event_t = gdk_event_get_time((GdkEvent *) event);
-
-        if (prev_pos) {
-            Geom::Coord dist = Geom::L2(event_pos - *prev_pos);
-            guint32 delta_t = event_t - prev_time;
-            gdouble speed = delta_t > 0 ? dist / delta_t : 1000;
-            //std::cout << "Mouse speed = " << speed << " px/msec " << std::endl;
-            if (speed > 0.02) { // Jitter threshold, might be needed for tablets
-                // We're moving fast, so postpone any snapping until the next GDK_MOTION_NOTIFY event. We
-                // will keep on postponing the snapping as long as the speed is high.
-                // We must snap at some point in time though, so set a watchdog timer at some time from
-                // now, just in case there's no future motion event that drops under the speed limit (when
-                // stopping abruptly)
-                delete ec->_delayed_snap_event;
-                ec->_delayed_snap_event = new DelayedSnapEvent(ec, dse_item, dse_item2,
-                        event, origin); // watchdog is reset, i.e. pushed forward in time
-                // If the watchdog expires before a new motion event is received, we will snap (as explained
-                // above). This means however that when the timer is too short, we will always snap and that the
-                // speed threshold is ineffective. In the extreme case the delay is set to zero, and snapping will
-                // be immediate, as it used to be in the old days ;-).
-            } else { // Speed is very low, so we're virtually at stand still
-                // But if we're really standing still, then we should snap now. We could use some low-pass filtering,
-                // otherwise snapping occurs for each jitter movement. For this filtering we'll leave the watchdog to expire,
-                // snap, and set a new watchdog again.
-                if (ec->_delayed_snap_event == NULL) { // no watchdog has been set
-                    // it might have already expired, so we'll set a new one; the snapping frequency will be limited this way
-                    ec->_delayed_snap_event = new DelayedSnapEvent(ec, dse_item,
-                            dse_item2, event, origin);
-                } // else: watchdog has been set before and we'll wait for it to expire
-            }
-        } else {
-            // This is the first GDK_MOTION_NOTIFY event, so postpone snapping and set the watchdog
-            g_assert(ec->_delayed_snap_event == NULL);
-            ec->_delayed_snap_event = new DelayedSnapEvent(ec, dse_item, dse_item2,
-                    event, origin);
-        }
-
-        prev_pos = event_pos;
-        prev_time = event_t;
-    }
-}
-
-/**
- * When the snap delay watchdog timer barks, this method will be called and will re-inject the last motion
- * event in an appropriate place, with snapping being turned on again.
- */
-gboolean sp_event_context_snap_watchdog_callback(gpointer data) {
-    // Snap NOW! For this the "postponed" flag will be reset and the last motion event will be repeated
-    DelayedSnapEvent *dse = reinterpret_cast<DelayedSnapEvent*> (data);
-
-    if (dse == NULL) {
-        // This might occur when this method is called directly, i.e. not through the timer
-        // E.g. on GDK_BUTTON_RELEASE in sp_event_context_root_handler()
-        return FALSE;
-    }
-
-    ToolBase *ec = dse->getEventContext();
-    if (ec == NULL) {
-        delete dse;
-        return false;
-    }
-    if (ec->desktop == NULL) {
-        ec->_delayed_snap_event = NULL;
-        delete dse;
-        return false;
-    }
-    
-    ec->_dse_callback_in_process = true;
-
-    SPDesktop *dt = ec->desktop;
-    dt->namedview->snap_manager.snapprefs.setSnapPostponedGlobally(false);
-
-    // Depending on where the delayed snap event originated from, we will inject it back at it's origin
-    // The switch below takes care of that and prepares the relevant parameters
-    switch (dse->getOrigin()) {
-    case DelayedSnapEvent::EVENTCONTEXT_ROOT_HANDLER:
-        sp_event_context_virtual_root_handler(ec, dse->getEvent());
-        break;
-    case DelayedSnapEvent::EVENTCONTEXT_ITEM_HANDLER: {
-        gpointer item = dse->getItem();
-        if (item && SP_IS_ITEM(item)) {
-            sp_event_context_virtual_item_handler(ec, SP_ITEM(item), dse->getEvent());
-        }
-    }
-        break;
-    case DelayedSnapEvent::KNOT_HANDLER: {
-        gpointer knot = dse->getItem2();
-        if (knot && SP_IS_KNOT(knot)) {
-            sp_knot_handler_request_position(dse->getEvent(), SP_KNOT(knot));
-        }
-    }
-        break;
-    case DelayedSnapEvent::CONTROL_POINT_HANDLER: {
-        using Inkscape::UI::ControlPoint;
-        gpointer pitem2 = dse->getItem2();
-        if (!pitem2)
-        {
-            ec->_delayed_snap_event = NULL;
-            delete dse;
-            return false;
-        }
-        ControlPoint *point = reinterpret_cast<ControlPoint*> (pitem2);
-        if (point) {
-            if (point->position().isFinite() && (dt == point->_desktop)) {            
-                point->_eventHandler(ec, dse->getEvent());
-            }
-            else {
-                //workaround:
-                //[Bug 781893] Crash after moving a Bezier node after Knot path effect?
-                // --> at some time, some point with X = 0 and Y = nan (not a number) is created ...
-                //     even so, the desktop pointer is invalid and equal to 0xff
-                g_warning ("encountered non finite point when evaluating snapping callback");
-            }
-        }
-    }
-        break;
-    case DelayedSnapEvent::GUIDE_HANDLER: {
-        gpointer item = dse->getItem();
-        gpointer item2 = dse->getItem2();
-        if (item && item2) {
-            g_assert(SP_IS_CANVAS_ITEM(item));
-            g_assert(SP_IS_GUIDE(item2));
-            sp_dt_guide_event(SP_CANVAS_ITEM(item), dse->getEvent(), item2);
-        }
-    }
-        break;
-    case DelayedSnapEvent::GUIDE_HRULER:
-    case DelayedSnapEvent::GUIDE_VRULER: {
-        gpointer item = dse->getItem();
-        gpointer item2 = dse->getItem2();
-        if (item && item2) {
-            g_assert(GTK_IS_WIDGET(item));
-            g_assert(SP_IS_DESKTOP_WIDGET(item2));
-            if (dse->getOrigin() == DelayedSnapEvent::GUIDE_HRULER) {
-                sp_dt_hruler_event(GTK_WIDGET(item), dse->getEvent(), SP_DESKTOP_WIDGET(item2));
-            } else {
-                sp_dt_vruler_event(GTK_WIDGET(item), dse->getEvent(), SP_DESKTOP_WIDGET(item2));
-            }
-        }
-    }
-        break;
-    default:
-        g_warning("Origin of snap-delay event has not been defined!;");
-        break;
-    }
-
-    ec->_delayed_snap_event = NULL;
-    delete dse;
-
-    ec->_dse_callback_in_process = false;
-
-    return FALSE; //Kills the timer and stops it from executing this callback over and over again.
-}
-
-void sp_event_context_discard_delayed_snap_event(ToolBase *ec) {
-    delete ec->_delayed_snap_event;
-    ec->_delayed_snap_event = NULL;
-    ec->desktop->namedview->snap_manager.snapprefs.setSnapPostponedGlobally(false);
-}
-
-}
-}
-}
-
-/*
- Local Variables:
- mode:c++
- c-file-style:"stroustrup"
- c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
- indent-tabs-mode:nil
- fill-column:99
- End:
- */
-// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :