new haveIntersection method

CHANGELOG.md

@@ -10,6 +10,7 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 * new `Konva.Transformer` group that allow simple resize, and rotate of a shape.
 * Add ability to remove event by callback `node.off('event', callback)`.
 * new `Konva.Filters.Contrast`.
+* new `Konva.Util.haveIntersection()` to detect collusion
 
 ## Changed
 

konva.js

@@ -2,7 +2,7 @@
  * Konva JavaScript Framework v1.7.6
  * http://konvajs.github.io/
  * Licensed under the MIT
- * Date: Mon Feb 05 2018
+ * Date: Tue Feb 06 2018
  *
  * Original work Copyright (C) 2011 - 2013 by Eric Rowell (KineticJS)
  * Modified work Copyright (C) 2014 - present by Anton Lavrenov (Konva)
@@ -732,59 +732,6 @@
     _isString: function(obj) {
       return Object.prototype.toString.call(obj) === OBJECT_STRING;
     },
-    // Returns a function, that, when invoked, will only be triggered at most once
-    // during a given window of time. Normally, the throttled function will run
-    // as much as it can, without ever going more than once per `wait` duration;
-    // but if you'd like to disable the execution on the leading edge, pass
-    // `{leading: false}`. To disable execution on the trailing edge, ditto.
-    _throttle: function(func, wait, opts) {
-      var context, args, result;
-      var timeout = null;
-      var previous = 0;
-      var options = opts || {};
-      var later = function() {
-        previous = options.leading === false ? 0 : new Date().getTime();
-        timeout = null;
-        result = func.apply(context, args);
-        context = args = null;
-      };
-      return function() {
-        var now = new Date().getTime();
-        if (!previous && options.leading === false) {
-          previous = now;
-        }
-        var remaining = wait - (now - previous);
-        context = this;
-        args = arguments;
-        if (remaining <= 0) {
-          clearTimeout(timeout);
-          timeout = null;
-          previous = now;
-          result = func.apply(context, args);
-          context = args = null;
-        } else if (!timeout && options.trailing !== false) {
-          timeout = setTimeout(later, remaining);
-        }
-        return result;
-      };
-    },
-    /*
-         * other utils
-         */
-    _hasMethods: function(obj) {
-      var names = [],
-        key;
-
-      for (key in obj) {
-        if (!obj.hasOwnProperty(key)) {
-          continue;
-        }
-        if (this._isFunction(obj[key])) {
-          names.push(key);
-        }
-      }
-      return names.length > 0;
-    },
     isValidSelector: function(selector) {
       if (typeof selector !== 'string') {
         return false;
@@ -1037,6 +984,19 @@
       }
       return retObj;
     },
+    /**
+     * check intersection of two client rectangles
+     * @method
+     * @memberof Konva.Util.prototype
+     */
+    haveIntersection: function(r1, r2) {
+      return !(
+        r2.x > r1.x + r1.width ||
+        r2.x + r2.width < r1.x ||
+        r2.y > r1.y + r1.height ||
+        r2.y + r2.height < r1.y
+      );
+    },
     cloneObject: function(obj) {
       var retObj = {};
       for (var key in obj) {
@@ -18348,6 +18308,8 @@
     'bottom-right'
   ];
 
+  var warningShowed = false;
+
   Konva.Transformer.prototype = {
     _centroid: false,
     ____init: function(config) {
@@ -18361,6 +18323,13 @@
 
       // update transformer data for certain attr changes
       this.on(ATTR_CHANGE_LIST, this._update);
+
+      if (!warningShowed) {
+        Konva.Util.warn(
+          'Konva.Transformer is currently experimental and may have many bugs. Please report any bugs to GitHub repo.'
+        );
+        warningShowed = true;
+      }
     },
 
     attachTo: function(node) {

src/Util.js

@@ -487,59 +487,6 @@
     _isString: function(obj) {
       return Object.prototype.toString.call(obj) === OBJECT_STRING;
     },
-    // Returns a function, that, when invoked, will only be triggered at most once
-    // during a given window of time. Normally, the throttled function will run
-    // as much as it can, without ever going more than once per `wait` duration;
-    // but if you'd like to disable the execution on the leading edge, pass
-    // `{leading: false}`. To disable execution on the trailing edge, ditto.
-    _throttle: function(func, wait, opts) {
-      var context, args, result;
-      var timeout = null;
-      var previous = 0;
-      var options = opts || {};
-      var later = function() {
-        previous = options.leading === false ? 0 : new Date().getTime();
-        timeout = null;
-        result = func.apply(context, args);
-        context = args = null;
-      };
-      return function() {
-        var now = new Date().getTime();
-        if (!previous && options.leading === false) {
-          previous = now;
-        }
-        var remaining = wait - (now - previous);
-        context = this;
-        args = arguments;
-        if (remaining <= 0) {
-          clearTimeout(timeout);
-          timeout = null;
-          previous = now;
-          result = func.apply(context, args);
-          context = args = null;
-        } else if (!timeout && options.trailing !== false) {
-          timeout = setTimeout(later, remaining);
-        }
-        return result;
-      };
-    },
-    /*
-         * other utils
-         */
-    _hasMethods: function(obj) {
-      var names = [],
-        key;
-
-      for (key in obj) {
-        if (!obj.hasOwnProperty(key)) {
-          continue;
-        }
-        if (this._isFunction(obj[key])) {
-          names.push(key);
-        }
-      }
-      return names.length > 0;
-    },
     isValidSelector: function(selector) {
       if (typeof selector !== 'string') {
         return false;
@@ -792,6 +739,19 @@
       }
       return retObj;
     },
+    /**
+     * check intersection of two client rectangles
+     * @method
+     * @memberof Konva.Util.prototype
+     */
+    haveIntersection: function(r1, r2) {
+      return !(
+        r2.x > r1.x + r1.width ||
+        r2.x + r2.width < r1.x ||
+        r2.y > r1.y + r1.height ||
+        r2.y + r2.height < r1.y
+      );
+    },
     cloneObject: function(obj) {
       var retObj = {};
       for (var key in obj) {

src/shapes/Transformer.js

@@ -34,6 +34,8 @@
     'bottom-right'
   ];
 
+  var warningShowed = false;
+
   Konva.Transformer.prototype = {
     _centroid: false,
     ____init: function(config) {
@@ -47,6 +49,13 @@
 
       // update transformer data for certain attr changes
       this.on(ATTR_CHANGE_LIST, this._update);
+
+      if (!warningShowed) {
+        Konva.Util.warn(
+          'Konva.Transformer is currently experimental and may have many bugs. Please report any bugs to GitHub repo.'
+        );
+        warningShowed = true;
+      }
     },
 
     attachTo: function(node) {