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-rw-r--r--src/desktop-events.cpp551
1 files changed, 551 insertions, 0 deletions
diff --git a/src/desktop-events.cpp b/src/desktop-events.cpp
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+++ b/src/desktop-events.cpp
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+// SPDX-License-Identifier: GPL-2.0-or-later
+/**
+ * @file
+ * Event handlers for SPDesktop.
+ */
+/* Author:
+ * Lauris Kaplinski <lauris@kaplinski.com>
+ * Abhishek Sharma
+ *
+ * Copyright (C) 1999-2002 Lauris Kaplinski
+ * Copyright (C) 1999-2010 Others
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include <map>
+#include <string>
+
+#include "desktop-events.h"
+
+#include <gdkmm/display.h>
+#include <gdkmm/seat.h>
+
+#include <gtk/gtk.h>
+
+#include <glibmm/i18n.h>
+
+#include <2geom/line.h>
+#include <2geom/angle.h>
+
+#include "desktop.h"
+#include "document-undo.h"
+#include "document.h"
+#include "message-context.h"
+#include "preferences.h"
+#include "snap.h"
+#include "sp-cursor.h"
+#include "verbs.h"
+
+#include "display/canvas-grid.h"
+#include "display/guideline.h"
+#include "display/snap-indicator.h"
+#include "display/sp-canvas.h"
+
+#include "helper/action.h"
+
+#include "ui/pixmaps/cursor-select.xpm"
+
+#include "object/sp-guide.h"
+#include "object/sp-namedview.h"
+#include "object/sp-root.h"
+
+#include "ui/dialog-events.h"
+#include "ui/tools-switch.h"
+#include "ui/dialog/guides.h"
+#include "ui/tools/tool-base.h"
+
+#include "widgets/desktop-widget.h"
+
+#include "xml/repr.h"
+
+using Inkscape::DocumentUndo;
+
+static void snoop_extended(GdkEvent* event, SPDesktop *desktop);
+static void init_extended();
+
+/* Root item handler */
+
+int sp_desktop_root_handler(SPCanvasItem */*item*/, GdkEvent *event, SPDesktop *desktop)
+{
+ static bool watch = false;
+ static bool first = true;
+
+ if ( first ) {
+ Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+ if ( prefs->getBool("/options/useextinput/value", true)
+ && prefs->getBool("/options/switchonextinput/value") ) {
+ watch = true;
+ init_extended();
+ }
+ first = false;
+ }
+ if ( watch ) {
+ snoop_extended(event, desktop);
+ }
+
+ return sp_event_context_root_handler(desktop->event_context, event);
+}
+
+
+
+static Geom::Point drag_origin;
+static SPGuideDragType drag_type = SP_DRAG_NONE;
+//static bool reset_drag_origin = false; // when Ctrl is pressed while dragging, this is used to trigger resetting of the
+// // drag origin to that location so that constrained movement is more intuitive
+
+// Min distance from anchor to initiate rotation, measured in screenpixels
+#define tol 40.0
+
+gint sp_dt_guide_event(SPCanvasItem *item, GdkEvent *event, gpointer data)
+{
+ static bool moved = false;
+ gint ret = FALSE;
+
+ SPGuide *guide = SP_GUIDE(data);
+ SPDesktop *desktop = static_cast<SPDesktop*>(g_object_get_data(G_OBJECT(item->canvas), "SPDesktop"));
+
+ switch (event->type) {
+ case GDK_2BUTTON_PRESS:
+ if (event->button.button == 1) {
+ drag_type = SP_DRAG_NONE;
+ sp_event_context_discard_delayed_snap_event(desktop->event_context);
+ sp_canvas_item_ungrab(item);
+ Inkscape::UI::Dialogs::GuidelinePropertiesDialog::showDialog(guide, desktop);
+ ret = TRUE;
+ }
+ break;
+ case GDK_BUTTON_PRESS:
+ if (event->button.button == 1) {
+ Geom::Point const event_w(event->button.x, event->button.y);
+ Geom::Point const event_dt(desktop->w2d(event_w));
+
+ // Due to the tolerance allowed when grabbing a guide, event_dt will generally
+ // be close to the guide but not just exactly on it. The drag origin calculated
+ // here must be exactly on the guide line though, otherwise
+ // small errors will occur once we snap, see
+ // https://bugs.launchpad.net/inkscape/+bug/333762
+ drag_origin = Geom::projection(event_dt, Geom::Line(guide->getPoint(), guide->angle()));
+
+ if (event->button.state & GDK_SHIFT_MASK) {
+ // with shift we rotate the guide
+ drag_type = SP_DRAG_ROTATE;
+ } else {
+ if (event->button.state & GDK_CONTROL_MASK) {
+ drag_type = SP_DRAG_MOVE_ORIGIN;
+ } else {
+ drag_type = SP_DRAG_TRANSLATE;
+ }
+ }
+
+ if (drag_type == SP_DRAG_ROTATE || drag_type == SP_DRAG_TRANSLATE) {
+ sp_canvas_item_grab(item,
+ ( GDK_BUTTON_RELEASE_MASK |
+ GDK_BUTTON_PRESS_MASK |
+ GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK ),
+ nullptr,
+ event->button.time);
+ }
+ ret = TRUE;
+ }
+ break;
+ case GDK_MOTION_NOTIFY:
+ if (drag_type != SP_DRAG_NONE) {
+ Geom::Point const motion_w(event->motion.x,
+ event->motion.y);
+ Geom::Point motion_dt(desktop->w2d(motion_w));
+
+ sp_event_context_snap_delay_handler(desktop->event_context, (gpointer) item, data, (GdkEventMotion *)event, Inkscape::UI::Tools::DelayedSnapEvent::GUIDE_HANDLER);
+
+ // This is for snapping while dragging existing guidelines. New guidelines,
+ // which are dragged off the ruler, are being snapped in sp_dt_ruler_event
+ SnapManager &m = desktop->namedview->snap_manager;
+ m.setup(desktop, true, nullptr, nullptr, guide);
+ if (drag_type == SP_DRAG_MOVE_ORIGIN) {
+ // If we snap in guideConstrainedSnap() below, then motion_dt will
+ // be forced to be on the guide. If we don't snap however, then
+ // the origin should still be constrained to the guide. So let's do
+ // that explicitly first:
+ Geom::Line line(guide->getPoint(), guide->angle());
+ Geom::Coord t = line.nearestTime(motion_dt);
+ motion_dt = line.pointAt(t);
+ if (!(event->motion.state & GDK_SHIFT_MASK)) {
+ m.guideConstrainedSnap(motion_dt, *guide);
+ }
+ } else if (!((drag_type == SP_DRAG_ROTATE) && (event->motion.state & GDK_CONTROL_MASK))) {
+ // cannot use shift here to disable snapping, because we already use it for rotating the guide
+ Geom::Point temp;
+ if (drag_type == SP_DRAG_ROTATE) {
+ temp = guide->getPoint();
+ m.guideFreeSnap(motion_dt, temp, true, false);
+ guide->moveto(temp, false);
+ } else {
+ temp = guide->getNormal();
+ m.guideFreeSnap(motion_dt, temp, false, true);
+ guide->set_normal(temp, false);
+ }
+ }
+ m.unSetup();
+
+ switch (drag_type) {
+ case SP_DRAG_TRANSLATE:
+ {
+ guide->moveto(motion_dt, false);
+ break;
+ }
+ case SP_DRAG_ROTATE:
+ {
+ Geom::Point pt = motion_dt - guide->getPoint();
+ Geom::Angle angle(pt);
+ if (event->motion.state & GDK_CONTROL_MASK) {
+ Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+ unsigned const snaps = abs(prefs->getInt("/options/rotationsnapsperpi/value", 12));
+ bool const relative_snaps = prefs->getBool("/options/relativeguiderotationsnap/value", false);
+ if (snaps) {
+ if (relative_snaps) {
+ Geom::Angle orig_angle(guide->getNormal());
+ Geom::Angle snap_angle = angle - orig_angle;
+ double sections = floor(snap_angle.radians0() * snaps / M_PI + .5);
+ angle = (M_PI / snaps) * sections + orig_angle.radians0();
+ } else {
+ double sections = floor(angle.radians0() * snaps / M_PI + .5);
+ angle = (M_PI / snaps) * sections;
+ }
+ }
+ }
+ guide->set_normal(Geom::Point::polar(angle).cw(), false);
+ break;
+ }
+ case SP_DRAG_MOVE_ORIGIN:
+ {
+ guide->moveto(motion_dt, false);
+ break;
+ }
+ case SP_DRAG_NONE:
+ assert(false);
+ break;
+ }
+ moved = true;
+ desktop->set_coordinate_status(motion_dt);
+
+ ret = TRUE;
+ }
+ break;
+ case GDK_BUTTON_RELEASE:
+ if (drag_type != SP_DRAG_NONE && event->button.button == 1) {
+ sp_event_context_discard_delayed_snap_event(desktop->event_context);
+
+ if (moved) {
+ Geom::Point const event_w(event->button.x,
+ event->button.y);
+ Geom::Point event_dt(desktop->w2d(event_w));
+
+ SnapManager &m = desktop->namedview->snap_manager;
+ m.setup(desktop, true, nullptr, nullptr, guide);
+ if (drag_type == SP_DRAG_MOVE_ORIGIN) {
+ // If we snap in guideConstrainedSnap() below, then motion_dt will
+ // be forced to be on the guide. If we don't snap however, then
+ // the origin should still be constrained to the guide. So let's
+ // do that explicitly first:
+ Geom::Line line(guide->getPoint(), guide->angle());
+ Geom::Coord t = line.nearestTime(event_dt);
+ event_dt = line.pointAt(t);
+ if (!(event->button.state & GDK_SHIFT_MASK)) {
+ m.guideConstrainedSnap(event_dt, *guide);
+ }
+ } else if (!((drag_type == SP_DRAG_ROTATE) && (event->motion.state & GDK_CONTROL_MASK))) {
+ // cannot use shift here to disable snapping, because we already use it for rotating the guide
+ Geom::Point temp;
+ if (drag_type == SP_DRAG_ROTATE) {
+ temp = guide->getPoint();
+ m.guideFreeSnap(event_dt, temp, true, false);
+ guide->moveto(temp, false);
+ } else {
+ temp = guide->getNormal();
+ m.guideFreeSnap(event_dt, temp, false, true);
+ guide->set_normal(temp, false);
+ }
+ }
+ m.unSetup();
+
+ if (sp_canvas_world_pt_inside_window(item->canvas, event_w)) {
+ switch (drag_type) {
+ case SP_DRAG_TRANSLATE:
+ {
+ guide->moveto(event_dt, true);
+ break;
+ }
+ case SP_DRAG_ROTATE:
+ {
+ Geom::Point pt = event_dt - guide->getPoint();
+ Geom::Angle angle(pt);
+ if (event->motion.state & GDK_CONTROL_MASK) {
+ Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+ unsigned const snaps = abs(prefs->getInt("/options/rotationsnapsperpi/value", 12));
+ bool const relative_snaps = prefs->getBool("/options/relativeguiderotationsnap/value", false);
+ if (snaps) {
+ if (relative_snaps) {
+ Geom::Angle orig_angle(guide->getNormal());
+ Geom::Angle snap_angle = angle - orig_angle;
+ double sections = floor(snap_angle.radians0() * snaps / M_PI + .5);
+ angle = (M_PI / snaps) * sections + orig_angle.radians0();
+ } else {
+ double sections = floor(angle.radians0() * snaps / M_PI + .5);
+ angle = (M_PI / snaps) * sections;
+ }
+ }
+ }
+ guide->set_normal(Geom::Point::polar(angle).cw(), true);
+ break;
+ }
+ case SP_DRAG_MOVE_ORIGIN:
+ {
+ guide->moveto(event_dt, true);
+ break;
+ }
+ case SP_DRAG_NONE:
+ assert(false);
+ break;
+ }
+ DocumentUndo::done(desktop->getDocument(), SP_VERB_NONE,
+ _("Move guide"));
+ } else {
+ /* Undo movement of any attached shapes. */
+ guide->moveto(guide->getPoint(), false);
+ guide->set_normal(guide->getNormal(), false);
+ sp_guide_remove(guide);
+
+ Glib::wrap(GTK_WIDGET(desktop->getCanvas()))->get_window()->set_cursor(desktop->event_context->cursor);
+
+ DocumentUndo::done(desktop->getDocument(), SP_VERB_NONE,
+ _("Delete guide"));
+ }
+ moved = false;
+ desktop->set_coordinate_status(event_dt);
+ }
+ drag_type = SP_DRAG_NONE;
+ sp_canvas_item_ungrab(item);
+ ret=TRUE;
+ }
+ break;
+ case GDK_ENTER_NOTIFY:
+ {
+ if (!guide->getLocked()) {
+ sp_guideline_set_color(SP_GUIDELINE(item), guide->getHiColor());
+ }
+
+ // set move or rotate cursor
+ Geom::Point const event_w(event->crossing.x, event->crossing.y);
+
+ GdkDisplay *display = gdk_display_get_default();
+ GdkCursorType cursor_type;
+
+ if ((event->crossing.state & GDK_SHIFT_MASK) && (drag_type != SP_DRAG_MOVE_ORIGIN)) {
+ cursor_type = GDK_EXCHANGE;
+ } else {
+ cursor_type = GDK_HAND1;
+ }
+
+ GdkCursor *guide_cursor = gdk_cursor_new_for_display(display, cursor_type);
+ if(guide->getLocked()){
+ guide_cursor = sp_cursor_from_xpm(cursor_select_xpm);
+ }
+ gdk_window_set_cursor(gtk_widget_get_window (GTK_WIDGET(desktop->getCanvas())), guide_cursor);
+ g_object_unref(guide_cursor);
+
+ char *guide_description = guide->description();
+ desktop->guidesMessageContext()->setF(Inkscape::NORMAL_MESSAGE, _("<b>Guideline</b>: %s"), guide_description);
+ g_free(guide_description);
+ break;
+ }
+ case GDK_LEAVE_NOTIFY:
+ sp_guideline_set_color(SP_GUIDELINE(item), guide->getColor());
+
+ // restore event context's cursor
+ Glib::wrap(GTK_WIDGET(desktop->getCanvas()))->get_window()->set_cursor(desktop->event_context->cursor);
+
+ desktop->guidesMessageContext()->clear();
+ break;
+ case GDK_KEY_PRESS:
+ switch (Inkscape::UI::Tools::get_latin_keyval (&event->key)) {
+ case GDK_KEY_Delete:
+ case GDK_KEY_KP_Delete:
+ case GDK_KEY_BackSpace:
+ {
+ SPDocument *doc = guide->document;
+ sp_guide_remove(guide);
+ DocumentUndo::done(doc, SP_VERB_NONE, _("Delete guide"));
+ ret = TRUE;
+ sp_event_context_discard_delayed_snap_event(desktop->event_context);
+ Glib::wrap(GTK_WIDGET(desktop->getCanvas()))->get_window()->set_cursor(desktop->event_context->cursor);
+ break;
+ }
+ case GDK_KEY_Shift_L:
+ case GDK_KEY_Shift_R:
+ if (drag_type != SP_DRAG_MOVE_ORIGIN) {
+ GdkDisplay *display = gdk_display_get_default();
+ GdkCursor *guide_cursor = gdk_cursor_new_for_display(display, GDK_EXCHANGE);
+ gdk_window_set_cursor(gtk_widget_get_window (GTK_WIDGET(desktop->getCanvas())), guide_cursor);
+ g_object_unref(guide_cursor);
+ ret = TRUE;
+ break;
+ }
+
+ default:
+ // do nothing;
+ break;
+ }
+ break;
+ case GDK_KEY_RELEASE:
+ switch (Inkscape::UI::Tools::get_latin_keyval (&event->key)) {
+ case GDK_KEY_Shift_L:
+ case GDK_KEY_Shift_R:
+ {
+ GdkDisplay *display = gdk_display_get_default();
+ GdkCursor *guide_cursor = gdk_cursor_new_for_display(display, GDK_HAND1);
+ gdk_window_set_cursor(gtk_widget_get_window (GTK_WIDGET(desktop->getCanvas())), guide_cursor);
+ g_object_unref(guide_cursor);
+ break;
+ }
+ default:
+ // do nothing;
+ break;
+ }
+ break;
+ default:
+ break;
+ }
+
+ return ret;
+}
+
+//static std::map<GdkInputSource, std::string> switchMap;
+static std::map<std::string, int> toolToUse;
+static std::string lastName;
+static GdkInputSource lastType = GDK_SOURCE_MOUSE;
+
+static void init_extended()
+{
+ Glib::ustring avoidName("pad");
+ auto display = Gdk::Display::get_default();
+ auto seat = display->get_default_seat();
+ auto const devices = seat->get_slaves(Gdk::SEAT_CAPABILITY_ALL);
+
+ if ( !devices.empty() ) {
+ for (auto const dev : devices) {
+ auto const devName = dev->get_name();
+ auto devSrc = dev->get_source();
+
+ if ( !devName.empty()
+ && (avoidName != devName)
+ && (devSrc != Gdk::SOURCE_MOUSE) ) {
+// g_message("Adding '%s' as [%d]", devName, devSrc);
+
+ // Set the initial tool for the device
+ switch ( devSrc ) {
+ case Gdk::SOURCE_PEN:
+ toolToUse[devName] = TOOLS_CALLIGRAPHIC;
+ break;
+ case Gdk::SOURCE_ERASER:
+ toolToUse[devName] = TOOLS_ERASER;
+ break;
+ case Gdk::SOURCE_CURSOR:
+ toolToUse[devName] = TOOLS_SELECT;
+ break;
+ default:
+ ; // do not add
+ }
+// } else if (devName) {
+// g_message("Skippn '%s' as [%d]", devName, devSrc);
+ }
+ }
+ }
+}
+
+
+void snoop_extended(GdkEvent* event, SPDesktop *desktop)
+{
+ GdkInputSource source = GDK_SOURCE_MOUSE;
+ std::string name;
+
+ switch ( event->type ) {
+ case GDK_MOTION_NOTIFY:
+ {
+ GdkEventMotion* event2 = reinterpret_cast<GdkEventMotion*>(event);
+ if ( event2->device ) {
+ source = gdk_device_get_source(event2->device);
+ name = gdk_device_get_name(event2->device);
+ }
+ }
+ break;
+
+ case GDK_BUTTON_PRESS:
+ case GDK_2BUTTON_PRESS:
+ case GDK_3BUTTON_PRESS:
+ case GDK_BUTTON_RELEASE:
+ {
+ GdkEventButton* event2 = reinterpret_cast<GdkEventButton*>(event);
+ if ( event2->device ) {
+ source = gdk_device_get_source(event2->device);
+ name = gdk_device_get_name(event2->device);
+ }
+ }
+ break;
+
+ case GDK_SCROLL:
+ {
+ GdkEventScroll* event2 = reinterpret_cast<GdkEventScroll*>(event);
+ if ( event2->device ) {
+ source = gdk_device_get_source(event2->device);
+ name = gdk_device_get_name(event2->device);
+ }
+ }
+ break;
+
+ case GDK_PROXIMITY_IN:
+ case GDK_PROXIMITY_OUT:
+ {
+ GdkEventProximity* event2 = reinterpret_cast<GdkEventProximity*>(event);
+ if ( event2->device ) {
+ source = gdk_device_get_source(event2->device);
+ name = gdk_device_get_name(event2->device);
+ }
+ }
+ break;
+
+ default:
+ ;
+ }
+
+ if (!name.empty()) {
+ if ( lastType != source || lastName != name ) {
+ // The device switched. See if it is one we 'count'
+ //g_message("Changed device %s -> %s", lastName.c_str(), name.c_str());
+ std::map<std::string, int>::iterator it = toolToUse.find(lastName);
+ if (it != toolToUse.end()) {
+ // Save the tool currently selected for next time the input
+ // device shows up.
+ it->second = tools_active(desktop);
+ }
+
+ it = toolToUse.find(name);
+ if (it != toolToUse.end() ) {
+ tools_switch(desktop, it->second);
+ }
+
+ lastName = name;
+ lastType = source;
+ }
+ }
+}
+/*
+ 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 :
+
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