Implement rotation for shapes.

frontend/uxbox/data/workspace.cljs

@@ -175,6 +175,17 @@
       (let [shape (get-in state [:shapes-by-id sid])]
         (update-in state [:shapes-by-id sid] shapes/-move {:dx dx :dy dy})))))
 
+(defn update-shape-rotation
+  [sid rotation]
+  {:pre [(number? rotation)
+         (>= rotation 0)
+         (>= 360 rotation)]}
+  (reify
+    rs/UpdateEvent
+    (-apply-update [_ state]
+      (update-in state [:shapes-by-id sid]
+                 shapes/-rotate rotation))))
+
 ;; TODO: implement locked resize
 
 (defn update-shape-size

frontend/uxbox/shapes.cljs

@@ -45,6 +45,10 @@
   dispatch-by-type
   :hierarchy #'+hierarchy+)
 
+(defmulti -rotate
+  dispatch-by-type
+  :hierarchy #'+hierarchy+)
+
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;; Implementation
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
@@ -60,3 +64,7 @@
   (assoc shape
          :width width
          :height height))
+
+(defmethod -rotate ::shape
+  [shape rotation]
+  (assoc shape :rotation rotation))

frontend/uxbox/ui/shapes.cljs

@@ -1,26 +1,37 @@
 (ns uxbox.ui.shapes
   "A ui related implementation for uxbox.shapes ns."
   (:require [sablono.core :refer-macros [html]]
+            [cuerdas.core :as str]
             [uxbox.shapes :as shapes]
             [uxbox.util.data :refer (remove-nil-vals)]))
 
 (defn- transform-attr
-  [[key value :as pair]]
+  [data [key value :as pair]]
   (case key
-    :view-box [key (apply str (interpose " " value))]
-    :lock [:preserveAspectRatio
-           (if value "xMidYMid" "none")]
+    :view-box
+    [key (apply str (interpose " " value))]
+
+    :lock
+    [:preserveAspectRatio (if value "xMidYMid" "none")]
+
+    :rotation
+    (let [width (nth (:view-box data) 3)
+          center-x (+ (:x data) (/ (:width data) 2))
+          center-y (+ (:y data) (/ (:height data) 2))]
+      [:transform (str/format "rotate(%s %s %s)" value center-x center-y)])
+
     pair))
 
 (defn- transform-attrs
-  [{:keys [view-box lock] :as data}]
-  (let [xf (map transform-attr)]
+  [data]
+  (let [xf (map (partial transform-attr data))]
     (into {} xf data)))
 
 (defn- extract-attrs
   "Extract predefinet attrs from shapes."
   [shape]
-  (select-keys shape [:lock :width :height :view-box :x :y :cx :cy]))
+  (select-keys shape [:rotation :lock :width :height
+                      :view-box :x :y :cx :cy]))
 
 (defmethod shapes/-render :builtin/icon
   [{:keys [data id] :as shape} attrs]
@@ -28,9 +39,11 @@
                 (extract-attrs $)
                 (remove-nil-vals $)
                 (merge $ attrs {:lock false})
-                (transform-attrs $))]
+                (transform-attrs $)
+                (merge $ {:key (str id)}))]
     (html
-     [:svg (merge attrs {:key (str id)}) data])))
+     [:g attrs
+      [:svg attrs data]])))
 
 (defmethod shapes/-render :builtin/icon-svg
   [{:keys [image id] :as shape} attrs]

frontend/uxbox/ui/workspace/options.cljs

@@ -84,8 +84,13 @@
             (let [value (dom/event->value event)
                   value (parse-int value 0)
                   sid (:id shape)]
-              (println value)
               (-> (dw/update-shape-size sid {:height value})
+                  (rs/emit!))))
+          (on-rotation-change [event]
+            (let [value (dom/event->value event)
+                  value (parse-int value 0)
+                  sid (:id shape)]
+              (-> (dw/update-shape-rotation sid value)
                   (rs/emit!))))]
     (html
      [:div.element-set {:key (str (:id menu))}
@@ -123,7 +128,12 @@
 
        [:span "Rotation"]
        [:div.row-flex
-        [:input.slidebar {:type "range"}]]]])))
+        [:input.slidebar
+         {:type "range"
+          :min 0
+          :max 360
+          :value (:rotation shape 0)
+          :on-change on-rotation-change}]]]])))
 
 (defn element-opts-render
   [own shape]