From 5562f1c65a931abfa0924ce345867fa9ad4ce8e2 Mon Sep 17 00:00:00 2001
From: johanengelen <johanengelen@users.sourceforge.net>
Date: Wed, 19 Dec 2007 23:30:04 +0000
Subject: [PATCH] correctly handle orientation changes of guidelines

---
 src/display/guideline.cpp |  6 ++++++
 src/display/guideline.h   |  1 +
 src/sp-guide.cpp          | 33 ++++++++++++++++++++++++++++++++-
 src/sp-guide.h            |  1 +
 4 files changed, 40 insertions(+), 1 deletion(-)

diff --git a/src/display/guideline.cpp b/src/display/guideline.cpp
index 32d0e0c1e..1f1d996ff 100644
--- a/src/display/guideline.cpp
+++ b/src/display/guideline.cpp
@@ -183,6 +183,12 @@ void sp_guideline_set_position(SPGuideLine *gl, Geom::Point point_on_line)
                                    NR::Matrix(NR::translate(point_on_line)));
 }
 
+void sp_guideline_set_normal(SPGuideLine *gl, Geom::Point normal_to_line)
+{
+    gl->normal_to_line = normal_to_line;
+    sp_canvas_item_request_update(SP_CANVAS_ITEM (gl));
+}
+
 void sp_guideline_set_color(SPGuideLine *gl, unsigned int rgba)
 {
     gl->rgba = rgba;
diff --git a/src/display/guideline.h b/src/display/guideline.h
index b3d9bb56b..24353af0a 100644
--- a/src/display/guideline.h
+++ b/src/display/guideline.h
@@ -41,6 +41,7 @@ GType sp_guideline_get_type();
 SPCanvasItem *sp_guideline_new(SPCanvasGroup *parent, Geom::Point point_on_line, Geom::Point normal);
 
 void sp_guideline_set_position(SPGuideLine *gl, Geom::Point point_on_line);
+void sp_guideline_set_normal(SPGuideLine *gl, Geom::Point normal_to_line);
 void sp_guideline_set_color(SPGuideLine *gl, unsigned int rgba);
 void sp_guideline_set_sensitive(SPGuideLine *gl, int sensitive);
 
diff --git a/src/sp-guide.cpp b/src/sp-guide.cpp
index 94f937ff9..bd5823e16 100644
--- a/src/sp-guide.cpp
+++ b/src/sp-guide.cpp
@@ -199,6 +199,7 @@ static void sp_guide_set(SPObject *object, unsigned int key, const gchar *value)
                 // default to vertical line for bad arguments
                 guide->normal_to_line = component_vectors[NR::X];
             }
+            sp_guide_set_normal(*guide, guide->normal_to_line.to_2geom(), false);
         }
         break;
     case SP_ATTR_POSITION:
@@ -301,7 +302,7 @@ void sp_guide_moveto(SPGuide const &guide, Geom::Point const point_on_line, bool
         sp_guideline_set_position(SP_GUIDELINE(l->data), point_on_line);
     }
 
-    /* Calling sp_repr_set_svg_double must precede calling sp_item_notify_moveto in the commit
+    /* Calling sp_repr_set_svg_point must precede calling sp_item_notify_moveto in the commit
        case, so that the guide's new position is available for sp_item_rm_unsatisfied_cns. */
     if (commit) {
         sp_repr_set_svg_point(SP_OBJECT(&guide)->repr, "position", point_on_line);
@@ -318,6 +319,36 @@ void sp_guide_moveto(SPGuide const &guide, Geom::Point const point_on_line, bool
 */
 }
 
+/**
+ * \arg commit False indicates temporary moveto in response to motion event while dragging,
+ *      true indicates a "committing" version: in response to button release event after
+ *      dragging a guideline, or clicking OK in guide editing dialog.
+ */
+void sp_guide_set_normal(SPGuide const &guide, Geom::Point const normal_to_line, bool const commit)
+{
+    g_assert(SP_IS_GUIDE(&guide));
+
+    for (GSList *l = guide.views; l != NULL; l = l->next) {
+        sp_guideline_set_normal(SP_GUIDELINE(l->data), normal_to_line);
+    }
+
+    /* Calling sp_repr_set_svg_point must precede calling sp_item_notify_moveto in the commit
+       case, so that the guide's new position is available for sp_item_rm_unsatisfied_cns. */
+    if (commit) {
+        sp_repr_set_svg_point(SP_OBJECT(&guide)->repr, "orientation", normal_to_line);
+    }
+
+/*  DISABLED CODE BECAUSE  SPGuideAttachment  IS NOT USE AT THE MOMENT (johan)
+    for (vector<SPGuideAttachment>::const_iterator i(guide.attached_items.begin()),
+             iEnd(guide.attached_items.end());
+         i != iEnd; ++i)
+    {
+        SPGuideAttachment const &att = *i;
+        sp_item_notify_moveto(*att.item, guide, att.snappoint_ix, position, commit);
+    }
+*/
+}
+
 /**
  * Returns a human-readable description of the guideline for use in dialog boxes and status bar.
  *
diff --git a/src/sp-guide.h b/src/sp-guide.h
index 48583bbe6..436428474 100644
--- a/src/sp-guide.h
+++ b/src/sp-guide.h
@@ -48,6 +48,7 @@ void sp_guide_sensitize(SPGuide *guide, SPCanvas *canvas, gboolean sensitive);
 Geom::Point sp_guide_position_from_pt(SPGuide const *guide, NR::Point const &pt);
 double sp_guide_distance_from_pt(SPGuide const *guide, Geom::Point const &pt);
 void sp_guide_moveto(SPGuide const &guide, Geom::Point const point_on_line, bool const commit);
+void sp_guide_set_normal(SPGuide const &guide, Geom::Point const normal_to_line, bool const commit);
 void sp_guide_remove(SPGuide *guide);
 
 char *sp_guide_description(SPGuide const *guide);
-- 
2.30.2