static gint sp_dt_ruler_event(GtkWidget *widget, GdkEvent *event, SPDesktopWidget *dtw, bool horiz)
{
static bool clicked = false;
static bool dragged = false;
static SPCanvasItem *guide = NULL;
static Geom::Point normal;
int wx, wy;
static gint xp = 0, yp = 0; // where drag started
SPDesktop *desktop = dtw->desktop;
GdkWindow *window = gtk_widget_get_window(GTK_WIDGET(dtw->canvas));
gint width, height;
#if GTK_CHECK_VERSION(3,0,0)
GdkDevice *device = gdk_event_get_device(event);
gdk_window_get_device_position(window, device, &wx, &wy, NULL);
gdk_window_get_geometry(window, NULL /*x*/, NULL /*y*/, &width, &height);
#else
gdk_window_get_pointer(window, &wx, &wy, NULL);
gdk_window_get_geometry(window, NULL /*x*/, NULL /*y*/, &width, &height, NULL/*depth*/);
#endif
Geom::Point const event_win(wx, wy);
switch (event->type) {
case GDK_BUTTON_PRESS:
if (event->button.button == 1) {
clicked = true;
dragged = false;
// save click origin
xp = (gint) event->button.x;
yp = (gint) event->button.y;
Geom::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
Geom::Point const event_dt(desktop->w2d(event_w));
// calculate the normal of the guidelines when dragged from the edges of rulers.
Geom::Point normal_bl_to_tr(-1.,1.); //bottomleft to topright
Geom::Point normal_tr_to_bl(1.,1.); //topright to bottomleft
normal_bl_to_tr.normalize();
normal_tr_to_bl.normalize();
Inkscape::CanvasGrid * grid = sp_namedview_get_first_enabled_grid(desktop->namedview);
if (grid){
if (grid->getGridType() == Inkscape::GRID_AXONOMETRIC ) {
Inkscape::CanvasAxonomGrid *axonomgrid = dynamic_cast<Inkscape::CanvasAxonomGrid *>(grid);
if (event->button.state & GDK_CONTROL_MASK) {
// guidelines normal to gridlines
normal_bl_to_tr = Geom::Point::polar(-axonomgrid->angle_rad[0], 1.0);
normal_tr_to_bl = Geom::Point::polar(axonomgrid->angle_rad[2], 1.0);
} else {
normal_bl_to_tr = rot90(Geom::Point::polar(axonomgrid->angle_rad[2], 1.0));
normal_tr_to_bl = rot90(Geom::Point::polar(-axonomgrid->angle_rad[0], 1.0));
}
}
}
if (horiz) {
if (wx < 50) {
normal = normal_bl_to_tr;
} else if (wx > width - 50) {
normal = normal_tr_to_bl;
} else {
normal = Geom::Point(0.,1.);
}
} else {
if (wy < 50) {
normal = normal_bl_to_tr;
} else if (wy > height - 50) {
normal = normal_tr_to_bl;
} else {
normal = Geom::Point(1.,0.);
}
}
guide = sp_guideline_new(desktop->guides, NULL, event_dt, normal);
sp_guideline_set_color(SP_GUIDELINE(guide), desktop->namedview->guidehicolor);
#if GTK_CHECK_VERSION(3,0,0)
gdk_device_grab(device,
gtk_widget_get_window(widget),
GDK_OWNERSHIP_NONE,
FALSE,
(GdkEventMask)(GDK_BUTTON_RELEASE_MASK | GDK_POINTER_MOTION_MASK ),
NULL,
event->button.time);
#else
gdk_pointer_grab(gtk_widget_get_window (widget), FALSE,
(GdkEventMask)(GDK_BUTTON_RELEASE_MASK | GDK_POINTER_MOTION_MASK ),
NULL, NULL,
event->button.time);
#endif
}
break;
case GDK_MOTION_NOTIFY:
if (clicked) {
Geom::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
Geom::Point event_dt(desktop->w2d(event_w));
Inkscape::Preferences *prefs = Inkscape::Preferences::get();
gint tolerance = prefs->getIntLimited("/options/dragtolerance/value", 0, 0, 100);
if ( ( abs( (gint) event->motion.x - xp ) < tolerance )
&& ( abs( (gint) event->motion.y - yp ) < tolerance ) ) {
break;
}
dragged = true;
// explicitly show guidelines; if I draw a guide, I want them on
if ((horiz ? wy : wx) >= 0) {
desktop->namedview->setGuides(true);
}
if (!(event->motion.state & GDK_SHIFT_MASK)) {
sp_dt_ruler_snap_new_guide(desktop, guide, event_dt, normal);
}
sp_guideline_set_normal(SP_GUIDELINE(guide), normal);
sp_guideline_set_position(SP_GUIDELINE(guide), event_dt);
desktop->set_coordinate_status(event_dt);
}
break;
case GDK_BUTTON_RELEASE:
if (clicked && event->button.button == 1) {
sp_event_context_discard_delayed_snap_event(desktop->event_context);
#if GTK_CHECK_VERSION(3,0,0)
gdk_device_ungrab(device, event->button.time);
#else
gdk_pointer_ungrab(event->button.time);
#endif
Geom::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
Geom::Point event_dt(desktop->w2d(event_w));
if (!(event->button.state & GDK_SHIFT_MASK)) {
sp_dt_ruler_snap_new_guide(desktop, guide, event_dt, normal);
}
sp_canvas_item_destroy(guide);
guide = NULL;
if ((horiz ? wy : wx) >= 0) {
Inkscape::XML::Document *xml_doc = desktop->doc()->getReprDoc();
Inkscape::XML::Node *repr = xml_doc->createElement("sodipodi:guide");
// If root viewBox set, interpret guides in terms of viewBox (90/96)
double newx = event_dt.x();
double newy = event_dt.y();
SPRoot *root = desktop->doc()->getRoot();
if( root->viewBox_set ) {
newx = newx * root->viewBox.width() / root->width.computed;
newy = newy * root->viewBox.height() / root->height.computed;
}
sp_repr_set_point(repr, "position", Geom::Point( newx, newy ));
sp_repr_set_point(repr, "orientation", normal);
desktop->namedview->appendChild(repr);
Inkscape::GC::release(repr);
DocumentUndo::done(desktop->getDocument(), SP_VERB_NONE,
_("Create guide"));
}
desktop->set_coordinate_status(event_dt);
if (!dragged) {
// Ruler click (without drag) toggle the guide visibility on and off
Inkscape::XML::Node *repr = desktop->namedview->getRepr();
sp_namedview_toggle_guides(desktop->getDocument(), repr);
}
clicked = false;
dragged = false;
}
default:
break;
}
return FALSE;
}
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, event->button.time);
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 ),
NULL,
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, NULL, NULL, 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, NULL, NULL, 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);
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, event->button.time);
ret=TRUE;
}
break;
case GDK_ENTER_NOTIFY:
{
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);
if ((event->crossing.state & GDK_SHIFT_MASK) && (drag_type != SP_DRAG_MOVE_ORIGIN)) {
GdkCursor *guide_cursor;
guide_cursor = gdk_cursor_new (GDK_EXCHANGE);
gdk_window_set_cursor(gtk_widget_get_window (GTK_WIDGET(desktop->getCanvas())), guide_cursor);
#if GTK_CHECK_VERSION(3,0,0)
g_object_unref(guide_cursor);
#else
gdk_cursor_unref(guide_cursor);
#endif
} else {
GdkCursor *guide_cursor;
guide_cursor = gdk_cursor_new (GDK_HAND1);
gdk_window_set_cursor(gtk_widget_get_window (GTK_WIDGET(desktop->getCanvas())), guide_cursor);
#if GTK_CHECK_VERSION(3,0,0)
g_object_unref(guide_cursor);
#else
gdk_cursor_unref(guide_cursor);
#endif
}
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
gdk_window_set_cursor(gtk_widget_get_window (GTK_WIDGET(desktop->getCanvas())), desktop->event_context->cursor);
desktop->guidesMessageContext()->clear();
break;
case GDK_KEY_PRESS:
switch (Inkscape::UI::Tools::get_group0_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);
break;
}
case GDK_KEY_Shift_L:
case GDK_KEY_Shift_R:
if (drag_type != SP_DRAG_MOVE_ORIGIN) {
GdkCursor *guide_cursor;
guide_cursor = gdk_cursor_new (GDK_EXCHANGE);
gdk_window_set_cursor(gtk_widget_get_window (GTK_WIDGET(desktop->getCanvas())), guide_cursor);
#if GTK_CHECK_VERSION(3,0,0)
g_object_unref(guide_cursor);
#else
gdk_cursor_unref(guide_cursor);
#endif
ret = TRUE;
break;
}
default:
// do nothing;
break;
}
break;
case GDK_KEY_RELEASE:
switch (Inkscape::UI::Tools::get_group0_keyval (&event->key)) {
case GDK_KEY_Shift_L:
case GDK_KEY_Shift_R:
GdkCursor *guide_cursor;
guide_cursor = gdk_cursor_new (GDK_EXCHANGE);
gdk_window_set_cursor(gtk_widget_get_window (GTK_WIDGET(desktop->getCanvas())), guide_cursor);
#if GTK_CHECK_VERSION(3,0,0)
g_object_unref(guide_cursor);
#else
gdk_cursor_unref(guide_cursor);
#endif
break;
default:
// do nothing;
break;
}
break;
default:
break;
}
return ret;
}
