Code

Merge and cleanup of GSoC C++-ification project.
[inkscape.git] / src / seltrans.cpp
index 627620a6007e7c0363a41830a29e9c4c4d798ebf..b0e19e60c5d9747835c2a9ea498c8621bded7c74 100644 (file)
@@ -6,6 +6,7 @@
  *   bulia byak <buliabyak@users.sf.net>
  *   Carl Hetherington <inkscape@carlh.net>
  *   Diederik van Lierop <mail@diedenrezi.nl>
+ *   Abhishek Sharma
  *
  * Copyright (C) 1999-2002 Lauris Kaplinski
  * Copyright (C) 1999-2008 Authors
@@ -45,6 +46,7 @@
 #include <2geom/angle.h>
 #include "display/snap-indicator.h"
 
+using Inkscape::DocumentUndo;
 
 static void sp_remove_handles(SPKnot *knot[], gint num);
 
@@ -401,21 +403,6 @@ void Inkscape::SelTrans::grab(Geom::Point const &p, gdouble x, gdouble y, bool s
             g_warning("Checking number of snap sources failed; nothing serious, but please report to Diederik");
         }
 
-        // Optionally, show the snap source
-        if (!(_state == STATE_ROTATE && x != 0.5 && y != 0.5)) { // but not when we're dragging a rotation handle, because that won't snap
-            // Now either _bbox_points or _snap_points has a single element, the other one has zero..... or both have zero elements
-            if ((_snap_points.size() + _bbox_points.size() + _bbox_points_for_translating.size()) > 1) {
-                g_warning("too many snap sources to display, please fix this");
-            } else if (m.snapprefs.getSnapEnabledGlobally()) {
-                if (_bbox_points.size() == 1) {
-                    _desktop->snapindicator->set_new_snapsource(_bbox_points.at(0));
-                } else if (_bbox_points_for_translating.size() == 1) {
-                    _desktop->snapindicator->set_new_snapsource(_bbox_points_for_translating.at(0));
-                } else if (_snap_points.size() == 1){
-                    _desktop->snapindicator->set_new_snapsource(_snap_points.at(0));
-                }
-            }
-        }
     }
 
     if ((x != -1) && (y != -1)) {
@@ -520,17 +507,17 @@ void Inkscape::SelTrans::ungrab()
         _items_centers.clear();
 
         if (_current_relative_affine.isTranslation()) {
-            SPDocumentUndo::done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
-                             _("Move"));
+            DocumentUndo::done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
+                               _("Move"));
         } else if (_current_relative_affine.without_translation().isScale()) {
-            SPDocumentUndo::done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
-                             _("Scale"));
+            DocumentUndo::done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
+                               _("Scale"));
         } else if (_current_relative_affine.without_translation().isRotation()) {
-            SPDocumentUndo::done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
-                             _("Rotate"));
+            DocumentUndo::done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
+                               _("Rotate"));
         } else {
-            SPDocumentUndo::done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
-                             _("Skew"));
+            DocumentUndo::done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
+                               _("Skew"));
         }
 
     } else {
@@ -541,8 +528,8 @@ void Inkscape::SelTrans::ungrab()
                 SPItem *it = (SPItem*)SP_OBJECT(l->data);
                 SP_OBJECT(it)->updateRepr();
             }
-            SPDocumentUndo::done (sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
-                            _("Set center"));
+            DocumentUndo::done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
+                               _("Set center"));
         }
 
         _items.clear();
@@ -616,8 +603,8 @@ void Inkscape::SelTrans::stamp()
             Inkscape::GC::release(copy_repr);
             l = l->next;
         }
-        SPDocumentUndo::done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
-                         _("Stamp"));
+        DocumentUndo::done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
+                           _("Stamp"));
     }
 
     if ( fixup && _stamp_cache ) {
@@ -805,8 +792,8 @@ void Inkscape::SelTrans::handleClick(SPKnot */*knot*/, guint state, SPSelTransHa
                     _center_is_set = false;  // center has changed
                     _updateHandles();
                 }
-                SPDocumentUndo::done (sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
-                                        _("Reset center"));
+                DocumentUndo::done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
+                                   _("Reset center"));
             }
             break;
         default:
@@ -883,7 +870,11 @@ gboolean Inkscape::SelTrans::handleRequest(SPKnot *knot, Geom::Point *position,
     if (handle.request(this, handle, *position, state)) {
         sp_knot_set_position(knot, *position, state);
         SP_CTRL(_grip)->moveto(*position);
-        SP_CTRL(_norm)->moveto(_origin);
+        if (&handle == &handle_center) {
+            SP_CTRL(_norm)->moveto(*position);
+        } else {
+            SP_CTRL(_norm)->moveto(_origin);
+        }
     }
 
     return TRUE;
@@ -1035,6 +1026,7 @@ gboolean Inkscape::SelTrans::scaleRequest(Geom::Point &pt, guint state)
             geom_scale = Geom::Scale(sn.getTransformation());
             pt = _calcAbsAffineGeom(geom_scale);
         }
+        m.unSetup();
     }
 
     /* Status text */
@@ -1130,6 +1122,8 @@ gboolean Inkscape::SelTrans::stretchRequest(SPSelTransHandle const &handle, Geom
             // will have to calculate pt taking the stroke width into account
             pt = _calcAbsAffineGeom(geom_scale);
         }
+
+        m.unSetup();
     }
 
     // status text
@@ -1209,7 +1203,7 @@ gboolean Inkscape::SelTrans::skewRequest(SPSelTransHandle const &handle, Geom::P
         SnapManager &m = _desktop->namedview->snap_manager;
         m.setup(_desktop, false, _items_const);
 
-        Inkscape::Snapper::ConstraintLine const constraint(component_vectors[dim_b]);
+        Inkscape::Snapper::SnapConstraint const constraint(component_vectors[dim_b]);
         // When skewing, we cannot snap the corners of the bounding box, see the comment in "constrainedSnapSkew" for details
         Geom::Point const s(skew[dim_a], scale[dim_a]);
         Inkscape::SnappedPoint sn = m.constrainedSnapSkew(_snap_points, _point, constraint, s, _origin, Geom::Dim2(dim_b));
@@ -1222,6 +1216,8 @@ gboolean Inkscape::SelTrans::skewRequest(SPSelTransHandle const &handle, Geom::P
         } else {
             _desktop->snapindicator->remove_snaptarget();
         }
+
+        m.unSetup();
     }
 
     // Update the handle position
@@ -1276,7 +1272,10 @@ gboolean Inkscape::SelTrans::rotateRequest(Geom::Point &pt, guint state)
     if (fabs(h2) < 1e-15) return FALSE;
     Geom::Point q2 = d2 / h2; // normalized new vector to handle
 
-    double radians;
+    Geom::Rotate r1(q1);
+    Geom::Rotate r2(q2);
+
+    double radians = atan2(Geom::dot(Geom::rot90(d1), d2), Geom::dot(d1, d2));;
     if (state & GDK_CONTROL_MASK) {
         // Snap to defined angle increments
         double cos_t = Geom::dot(q1, q2);
@@ -1285,15 +1284,27 @@ gboolean Inkscape::SelTrans::rotateRequest(Geom::Point &pt, guint state)
         if (snaps) {
             radians = ( M_PI / snaps ) * floor( radians * snaps / M_PI + .5 );
         }
-        q1 = Geom::Point(1, 0);
-        q2 = Geom::Point(cos(radians), sin(radians));
+        r1 = Geom::Rotate(0); //q1 = Geom::Point(1, 0);
+        r2 = Geom::Rotate(radians); //q2 = Geom::Point(cos(radians), sin(radians));
     } else {
-        radians = atan2(Geom::dot(Geom::rot90(d1), d2),
-                        Geom::dot(d1, d2));
+        SnapManager &m = _desktop->namedview->snap_manager;
+        m.setup(_desktop, false, _items_const);
+        // When rotating, we cannot snap the corners of the bounding box, see the comment in "constrainedSnapRotate" for details
+        Inkscape::SnappedPoint sn = m.constrainedSnapRotate(_snap_points, _point, radians, _origin);
+        m.unSetup();
+
+        if (sn.getSnapped()) {
+            _desktop->snapindicator->set_new_snaptarget(sn);
+            // We snapped something, so change the rotation to reflect it
+            radians = sn.getTransformation()[0];
+            r1 = Geom::Rotate(0);
+            r2 = Geom::Rotate(radians);
+        } else {
+            _desktop->snapindicator->remove_snaptarget();
+        }
+
     }
 
-    Geom::Rotate const r1(q1);
-    Geom::Rotate const r2(q2);
 
     // Calculate the relative affine
     _relative_affine = r2 * r1.inverse();
@@ -1314,36 +1325,29 @@ gboolean Inkscape::SelTrans::rotateRequest(Geom::Point &pt, guint state)
 // Move the item's transformation center
 gboolean Inkscape::SelTrans::centerRequest(Geom::Point &pt, guint state)
 {
+    // When dragging the transformation center while multiple items have been selected, then those
+    // items will share a single center. While dragging that single center, it should never snap to the
+    // centers of any of the selected objects. Therefore we will have to pass the list of selected items
+    // to the snapper, to avoid self-snapping of the rotation center
+    GSList *items = (GSList *) const_cast<Selection *>(_selection)->itemList();
     SnapManager &m = _desktop->namedview->snap_manager;
     m.setup(_desktop);
-    m.freeSnapReturnByRef(pt, Inkscape::SNAPSOURCE_OTHER_HANDLE);
-
-    if (state & GDK_CONTROL_MASK) {
-        if ( fabs(_point[Geom::X] - pt[Geom::X]) > fabs(_point[Geom::Y] - pt[Geom::Y]) ) {
-            pt[Geom::Y] = _point[Geom::Y];
-        } else {
-            pt[Geom::X] = _point[Geom::X];
+    m.setRotationCenterSource(items);
+
+    if (state & GDK_CONTROL_MASK) { // with Ctrl, constrain to axes
+        std::vector<Inkscape::Snapper::SnapConstraint> constraints;
+        constraints.push_back(Inkscape::Snapper::SnapConstraint(_point, Geom::Point(1, 0)));
+        constraints.push_back(Inkscape::Snapper::SnapConstraint(_point, Geom::Point(0, 1)));
+        Inkscape::SnappedPoint sp = m.multipleConstrainedSnaps(Inkscape::SnapCandidatePoint(pt, Inkscape::SNAPSOURCE_ROTATION_CENTER), constraints, state & GDK_SHIFT_MASK);
+        pt = sp.getPoint();
+    }
+    else {
+        if (!(state & GDK_SHIFT_MASK)) { // Shift disables snapping
+            m.freeSnapReturnByRef(pt, Inkscape::SNAPSOURCE_ROTATION_CENTER);
         }
     }
 
-    if ( !(state & GDK_SHIFT_MASK) && _bbox ) {
-        // screen pixels to snap center to bbox
-#define SNAP_DIST 5
-        // FIXME: take from prefs
-        double snap_dist = SNAP_DIST / _desktop->current_zoom();
-
-        for (int i = 0; i < 2; i++) {
-            if (fabs(pt[i] - _bbox->min()[i]) < snap_dist) {
-                pt[i] = _bbox->min()[i];
-            }
-            if (fabs(pt[i] - _bbox->midpoint()[i]) < snap_dist) {
-                pt[i] = _bbox->midpoint()[i];
-            }
-            if (fabs(pt[i] - _bbox->max()[i]) < snap_dist) {
-                pt[i] = _bbox->max()[i];
-            }
-        }
-    }
+    m.unSetup();
 
     // status text
     GString *xs = SP_PX_TO_METRIC_STRING(pt[Geom::X], _desktop->namedview->getDefaultMetric());
@@ -1430,6 +1434,7 @@ void Inkscape::SelTrans::moveTo(Geom::Point const &xy, guint state)
         }
         m.setup(_desktop, true, _items_const);
         dxy = m.multipleOfGridPitch(dxy, _point);
+        m.unSetup();
     } else if (shift) {
         if (control) { // shift & control: constrained movement without snapping
             if (fabs(dxy[Geom::X]) > fabs(dxy[Geom::Y])) {
@@ -1460,14 +1465,14 @@ void Inkscape::SelTrans::moveTo(Geom::Point const &xy, guint state)
             // the constraint-line once. The constraint lines are parallel, but might not be colinear.
             // Therefore we will have to set the point through which the constraint-line runs
             // individually for each point to be snapped; this will be handled however by _snapTransformed()
-            s.push_back(m.constrainedSnapTranslation(_bbox_points_for_translating,
+            s.push_back(m.constrainedSnapTranslate(_bbox_points_for_translating,
                                                      _point,
-                                                     Inkscape::Snapper::ConstraintLine(component_vectors[dim]),
+                                                     Inkscape::Snapper::SnapConstraint(component_vectors[dim]),
                                                      dxy));
 
-            s.push_back(m.constrainedSnapTranslation(_snap_points,
+            s.push_back(m.constrainedSnapTranslate(_snap_points,
                                                      _point,
-                                                     Inkscape::Snapper::ConstraintLine(component_vectors[dim]),
+                                                     Inkscape::Snapper::SnapConstraint(component_vectors[dim]),
                                                      dxy));
         } else { // !control
 
@@ -1477,13 +1482,14 @@ void Inkscape::SelTrans::moveTo(Geom::Point const &xy, guint state)
             g_get_current_time(&starttime); */
 
             /* Snap to things with no constraint */
-            s.push_back(m.freeSnapTranslation(_bbox_points_for_translating, _point, dxy));
-            s.push_back(m.freeSnapTranslation(_snap_points, _point, dxy));
+            s.push_back(m.freeSnapTranslate(_bbox_points_for_translating, _point, dxy));
+            s.push_back(m.freeSnapTranslate(_snap_points, _point, dxy));
 
               /*g_get_current_time(&endtime);
               double elapsed = ((((double)endtime.tv_sec - starttime.tv_sec) * G_USEC_PER_SEC + (endtime.tv_usec - starttime.tv_usec))) / 1000.0;
               std::cout << "Time spent snapping: " << elapsed << std::endl; */
         }
+        m.unSetup();
 
         /* Pick one */
         Inkscape::SnappedPoint best_snapped_point;
@@ -1504,7 +1510,7 @@ void Inkscape::SelTrans::moveTo(Geom::Point const &xy, guint state)
             if (control) {
                 // If we didn't snap, then we should still constrain horizontally or vertically
                 // (When we did snap, then this constraint has already been enforced by
-                // calling constrainedSnapTranslation() above)
+                // calling constrainedSnapTranslate() above)
                 if (fabs(dxy[Geom::X]) > fabs(dxy[Geom::Y])) {
                     dxy[Geom::Y] = 0;
                 } else {
@@ -1641,6 +1647,7 @@ void Inkscape::SelTrans::_keepClosestPointOnly(std::vector<Inkscape::SnapCandida
         }
     }
 
+    closest_point.setSourceNum(-1);
     points.clear();
     points.push_back(closest_point);
 }
@@ -1654,4 +1661,4 @@ void Inkscape::SelTrans::_keepClosestPointOnly(std::vector<Inkscape::SnapCandida
   fill-column:99
   End:
 */
-// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :