merge lp:~inkscape.dev/inkscape/doc_rotate

(bzr r15444)

1 files changed, 49 insertions, 13 deletions

diff --git a/src/viewbox.cpp b/src/viewbox.cpp
index 1b50fe71c..ebfc04d8a 100644
--- a/src/viewbox.cpp
+++ b/src/viewbox.cpp
@@ -17,6 +17,8 @@
 #include "viewbox.h"
 #include "enums.h"
 #include "sp-item.h"
+#include "inkscape.h"
+#include "desktop.h"
 
 SPViewBox::SPViewBox()
     : viewBox_set(false)
@@ -25,6 +27,11 @@ SPViewBox::SPViewBox()
     , aspect_align(SP_ASPECT_XMID_YMID) // Default per spec
     , aspect_clip(SP_ASPECT_MEET)
     , c2p(Geom::identity())
+    , vbt(Geom::identity())
+    , rotation(Geom::identity())
+    , angle(0)
+    , previous_angle(0)
+    , rotated(false)
 {
 }
 
@@ -159,6 +166,16 @@ void SPViewBox::set_preserveAspectRatio(const gchar* value) {
   }
 }
 
+double SPViewBox::get_rotation() {
+    return this->angle;
+}
+
+void SPViewBox::set_rotation(double angle_val) {
+    this->previous_angle = this->angle;
+    this->angle = angle_val;
+    this->rotated = true;
+}
+
 // Apply scaling from viewbox
 void SPViewBox::apply_viewbox(const Geom::Rect& in, double scale_none) {
 
@@ -222,22 +239,41 @@ void SPViewBox::apply_viewbox(const Geom::Rect& in, double scale_none) {
           break;
       }
     }
-
     /* Viewbox transform from scale and position */
-    Geom::Affine q;
-    q[0] = scale_x;
-    q[1] = 0.0;
-    q[2] = 0.0;
-    q[3] = scale_y;
-    q[4] = x - scale_x * this->viewBox.left();
-    q[5] = y - scale_y * this->viewBox.top();
-
-    // std::cout << "  q\n" << q << std::endl;
-
-    /* Append viewbox transformation */
-    this->c2p = q * this->c2p;
+    vbt = Geom::identity();
+    vbt[0] = scale_x;
+    vbt[1] = 0.0;
+    vbt[2] = 0.0;
+    vbt[3] = scale_y;
+    vbt[4] = x - scale_x * this->viewBox.left();
+    vbt[5] = y - scale_y * this->viewBox.top();
+    /* Append viewbox and turn transformation */
+    Geom::Point page_center = this->viewBox.midpoint();
+    SPDesktop * desktop = SP_ACTIVE_DESKTOP;
+    if (this->angle > 0.0 || this->angle < 0.0 ) { //!0
+        if (desktop) {
+            rotation = Geom::Translate(page_center).inverse() * Geom::Rotate(Geom::rad_from_deg(angle)) * Geom::Translate(page_center);
+            this->c2p = rotation * vbt * this->c2p;
+        } else {
+            this->c2p = vbt * this->c2p;
+        }
+    } else {
+        this->c2p = vbt * this->c2p;
+    }
+    if (desktop && this->rotated) {
+        Geom::Rect view = desktop->get_display_area();
+        Geom::Point view_center = desktop->doc2dt(view.midpoint());
+        Geom::Affine center_rotation = Geom::identity();
+        center_rotation *= Geom::Translate(page_center * vbt).inverse();
+        center_rotation *= Geom::Rotate(Geom::rad_from_deg(this->angle - this->previous_angle));
+        center_rotation *= Geom::Translate(page_center * vbt);
+        view_center = desktop->dt2doc(view_center * center_rotation);
+        desktop->zoom_relative(view_center[Geom::X], view_center[Geom::Y], 1.0);
+        this->rotated = false;
+    }
 }
 
+
 SPItemCtx SPViewBox::get_rctx(const SPItemCtx* ictx, double scale_none) {
 
   /* Create copy of item context */