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diff --git a/src/pen-context.cpp b/src/pen-context.cpp
index 4fb7fbc99a2c4f31e9472688dd01e3926769c499..30b09013b09f770a37fa83d8d72d61dcd8c8895d 100644 (file)
--- a/src/pen-context.cpp
+++ b/src/pen-context.cpp
static gint sp_pen_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event);
static void spdc_pen_set_initial_point(SPPenContext *pc, NR::Point const p);
-static void spdc_pen_set_subsequent_point(SPPenContext *pc, NR::Point const p, bool statusbar);
+static void spdc_pen_set_subsequent_point(SPPenContext *const pc, NR::Point const p, bool statusbar, guint status = 0);
static void spdc_pen_set_ctrl(SPPenContext *pc, NR::Point const p, guint state);
static void spdc_pen_finish_segment(SPPenContext *pc, NR::Point p, guint state);
static SPDrawContextClass *pen_parent_class;
+static int pen_next_paraxial_direction(const SPPenContext *const pc, NR::Point const &pt, NR::Point const &origin, guint state);
+static void pen_set_to_nearest_horiz_vert(const SPPenContext *const pc, NR::Point &pt, guint const state);
+static NR::Point pen_get_intermediate_horiz_vert(const SPPenContext *const pc, NR::Point const &pt, guint const state);
+
+static int pen_last_paraxial_dir = 0; // last used direction in horizontal/vertical mode; 0 = horizontal, 1 = vertical
+
/**
* Register SPPenContext with Gdk and return its type.
*/
pc->events_disabled = 0;
- pc->polylines_only = prefs_get_int_attribute("tools.freehand.pen", "freehand-mode", 0);
+ pc->num_clicks = 0;
pc->waiting_LPE = NULL;
}
}
}
+void
+sp_pen_context_set_polyline_mode(SPPenContext *const pc) {
+ guint mode = prefs_get_int_attribute("tools.freehand.pen", "freehand-mode", 0);
+ pc->polylines_only = (mode == 2 || mode == 3);
+ pc->polylines_paraxial = (mode == 3);
+}
+
/**
* Callback to initialize SPPenContext object.
*/
pc->anchor_statusbar = false;
+ sp_pen_context_set_polyline_mode(pc);
+
if (prefs_get_int_attribute("tools.freehand.pen", "selcue", 0) != 0) {
ec->enableSelectionCue();
}
static void
pen_cancel (SPPenContext *const pc)
{
+ pc->num_clicks = 0;
pc->state = SP_PEN_CONTEXT_STOP;
spdc_reset_colors(pc);
sp_canvas_item_hide(pc->c0);
static void
spdc_endpoint_snap(SPPenContext const *const pc, NR::Point &p, guint const state)
{
-
if ((state & GDK_CONTROL_MASK)) { //CTRL enables angular snapping
if (pc->npoints > 0) {
spdc_endpoint_snap_rotation(pc, p, pc->p[0], state);
@@ -288,6 +303,10 @@ spdc_endpoint_snap(SPPenContext const *const pc, NR::Point &p, guint const state
spdc_endpoint_snap_free(pc, p, state);
}
}
+ if (pc->polylines_paraxial) {
+ // TODO: must we avoid one of the snaps in the previous case distinction in some situations?
+ pen_set_to_nearest_horiz_vert(pc, p, state);
+ }
}
/**
@@ -398,7 +417,7 @@ static gint pen_handle_button_press(SPPenContext *const pc, GdkEventButton const
gint ret = FALSE;
if (bevent.button == 1 && !event_context->space_panning
- // when the last click for a waiting LPE occurs we want to finish the path
+ // make sure this is not the last click for a waiting LPE (otherwise we want to finish the path)
&& pc->expecting_clicks_for_LPE != 1) {
if (Inkscape::have_viable_layer(desktop, dc->_message_context) == false) {
@@ -476,7 +495,11 @@ static gint pen_handle_button_press(SPPenContext *const pc, GdkEventButton const
/* Create green anchor */
p = event_dt;
- spdc_endpoint_snap(pc, p, bevent.state);
+ if (!pc->polylines_paraxial) {
+ // only snap the starting point if we're not in horizontal/vertical mode
+ // because otherwise it gets shifted; TODO: why do we snap here at all??
+ spdc_endpoint_snap(pc, p, bevent.state);
+ }
pc->green_anchor = sp_draw_anchor_new(pc, pc->green_curve, TRUE, p);
}
spdc_pen_set_initial_point(pc, p);
spdc_endpoint_snap(pc, p, mevent.state);
}
- spdc_pen_set_subsequent_point(pc, p, !anchor);
+ spdc_pen_set_subsequent_point(pc, p, !anchor, mevent.state);
if (anchor && !pc->anchor_statusbar) {
pc->_message_context->set(Inkscape::NORMAL_MESSAGE, _("<b>Click</b> or <b>click and drag</b> to close and finish the path."));
// TODO: can we be sure that the path was created correctly?
// TODO: should we offer an option to collect the clicks in a list?
if (pc->expecting_clicks_for_LPE == 0 && sp_pen_context_has_waiting_LPE(pc)) {
- pc->polylines_only = prefs_get_int_attribute("tools.freehand.pen", "freehand-mode", 0);
+ sp_pen_context_set_polyline_mode(pc);
SPEventContext *ec = SP_EVENT_CONTEXT(pc);
Inkscape::Selection *selection = sp_desktop_selection (ec->desktop);
pc->waiting_LPE->acceptParamPath(SP_PATH(selection->singleItem()));
selection->add(SP_OBJECT(pc->waiting_item));
pc->waiting_LPE = NULL;
- pc->polylines_only = prefs_get_int_attribute("tools.freehand.pen", "freehand-mode", 0);
} else {
// the case that we need to create a new LPE and apply it to the just-drawn path is
// handled in spdc_check_for_and_apply_waiting_LPE() in draw-context.cpp
if ( cubic &&
(*cubic)[2] != to_2geom(pc->p[0]) )
{
- NR::Point p2 = from_2geom((*cubic)[2]);
+ NR::Point p2 = (*cubic)[2];
SP_CTRL(pc->c0)->moveto(p2);
sp_ctrlline_set_coords(SP_CTRLLINE(pc->cl0), p2, pc->p[0]);
sp_canvas_item_show (pc->c0);
Geom::CubicBezier const * cubic = dynamic_cast<Geom::CubicBezier const *>( pc->green_curve->last_segment() );
if ( cubic ) {
- pc->p[1] = pc->p[0] + from_2geom( (*cubic)[3] - (*cubic)[2] );
+ pc->p[1] = pc->p[0] + (NR::Point)( (*cubic)[3] - (*cubic)[2] );
} else {
pc->p[1] = pc->p[0] + (1./3)*(pc->p[3] - pc->p[0]);
}
Geom::Curve const * crv = &path.back_default();
pc->p[0] = crv->initialPoint();
if ( Geom::CubicBezier const * cubic = dynamic_cast<Geom::CubicBezier const *>(crv)) {
- pc->p[1] = from_2geom( (*cubic)[1] );
+ pc->p[1] = (*cubic)[1];
} else {
pc->p[1] = pc->p[0];
}
NR::Point const pt(( pc->npoints < 4
- ? from_2geom(crv->finalPoint())
+ ? (NR::Point)(crv->finalPoint())
: pc->p[3] ));
pc->npoints = 2;
pc->green_curve->backspace();
@@ -1194,7 +1216,7 @@ spdc_pen_set_angle_distance_status_message(SPPenContext *const pc, NR::Point con
}
static void
-spdc_pen_set_subsequent_point(SPPenContext *const pc, NR::Point const p, bool statusbar)
+spdc_pen_set_subsequent_point(SPPenContext *const pc, NR::Point const p, bool statusbar, guint status)
{
g_assert( pc->npoints != 0 );
/* todo: Check callers to see whether 2 <= npoints is guaranteed. */
@@ -1204,15 +1226,25 @@ spdc_pen_set_subsequent_point(SPPenContext *const pc, NR::Point const p, bool st
pc->p[4] = p;
pc->npoints = 5;
pc->red_curve->reset();
- pc->red_curve->moveto(pc->p[0]);
bool is_curve;
- if (pc->p[1] != pc->p[0])
- {
- pc->red_curve->curveto(pc->p[1], p, p);
- is_curve = true;
- } else {
+ pc->red_curve->moveto(pc->p[0]);
+ if (pc->polylines_paraxial && !statusbar) {
+ // we are drawing horizontal/vertical lines and hit an anchor; draw an L-shaped path
+ NR::Point intermed = p;
+ pen_set_to_nearest_horiz_vert(pc, intermed, status);
+ pc->red_curve->lineto(intermed);
pc->red_curve->lineto(p);
is_curve = false;
+ } else {
+ // one of the 'regular' modes
+ if (pc->p[1] != pc->p[0])
+ {
+ pc->red_curve->curveto(pc->p[1], p, p);
+ is_curve = true;
+ } else {
+ pc->red_curve->lineto(p);
+ is_curve = false;
+ }
}
sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->red_bpath), pc->red_curve);
@@ -1269,8 +1301,13 @@ spdc_pen_set_ctrl(SPPenContext *const pc, NR::Point const p, guint const state)
}
static void
-spdc_pen_finish_segment(SPPenContext *const pc, NR::Point const /*p*/, guint const /*state*/)
+spdc_pen_finish_segment(SPPenContext *const pc, NR::Point const p, guint const state)
{
+ if (pc->polylines_paraxial) {
+ pen_last_paraxial_dir = pen_next_paraxial_direction(pc, p, pc->p[0], state);
+ }
+ ++pc->num_clicks;
+
if (!pc->red_curve->is_empty()) {
pc->green_curve->append_continuous(pc->red_curve, 0.0625);
SPCurve *curve = pc->red_curve->copy();
return;
}
+ pc->num_clicks = 0;
+
pen_disable_events(pc);
SPDesktop *const desktop = pc->desktop;
@@ -1346,9 +1385,56 @@ sp_pen_context_wait_for_LPE_mouse_clicks(SPPenContext *pc, Inkscape::LivePathEff
Inkscape::LivePathEffect::LPETypeConverter.get_label(effect_type).c_str());
pc->expecting_clicks_for_LPE = num_clicks;
pc->polylines_only = use_polylines;
+ pc->polylines_paraxial = false; // TODO: think if this is correct for all cases
pc->waiting_LPE_type = effect_type;
}
+static int pen_next_paraxial_direction(const SPPenContext *const pc,
+ NR::Point const &pt, NR::Point const &origin, guint state) {
+ /*
+ * after the first mouse click we determine whether the mouse pointer is closest to a
+ * horizontal or vertical segment; for all subsequent mouse clicks, we use the direction
+ * orthogonal to the last one; pressing Shift toggles the direction
+ */
+ if (pc->num_clicks == 0) {
+ // first mouse click
+ double dist_h = fabs(pt[NR::X] - origin[NR::X]);
+ double dist_v = fabs(pt[NR::Y] - origin[NR::Y]);
+ int ret = (dist_h < dist_v) ? 1 : 0; // 0 = horizontal, 1 = vertical
+ pen_last_paraxial_dir = (state & GDK_SHIFT_MASK) ? 1 - ret : ret;
+ return pen_last_paraxial_dir;
+ } else {
+ // subsequent mouse click
+ return (state & GDK_SHIFT_MASK) ? pen_last_paraxial_dir : 1 - pen_last_paraxial_dir;
+ }
+}
+
+void pen_set_to_nearest_horiz_vert(const SPPenContext *const pc, NR::Point &pt, guint const state)
+{
+ NR::Point const &origin = pc->p[0];
+
+ int next_dir = pen_next_paraxial_direction(pc, pt, origin, state);
+
+ if (next_dir == 0) {
+ // line is forced to be horizontal
+ pt[NR::Y] = origin[NR::Y];
+ } else {
+ // line is forced to be vertical
+ pt[NR::X] = origin[NR::X];
+ }
+}
+
+NR::Point pen_get_intermediate_horiz_vert(const SPPenContext *const pc, NR::Point const &pt)
+{
+ NR::Point const &origin = pc->p[0];
+
+ if (pen_last_paraxial_dir == 0) {
+ return NR::Point (origin[NR::X], pt[NR::Y]);
+ } else {
+ return NR::Point (pt[NR::X], origin[NR::Y]);
+ }
+}
+
/*
Local Variables:
mode:c++