Merge pull request #11 from grosbouddha/ca04f8db4dec4f3e3b88da15f884e6bf82a5a2ba

Tool plugin architecture

css/style.css

@@ -127,6 +127,26 @@ ul, li {
   z-index: 1;
 }
 
+.drawing-canvas-container {
+  float: left;
+}
+
+.tool-paint-bucket .drawing-canvas-container:hover {
+  cursor: url(../img/tools/paint-bucket.png) 18 17, pointer;
+}
+
+.tool-pen .drawing-canvas-container:hover {
+  cursor: url(../img/tools/pen.png) 7 21, pointer;
+}
+
+.tool-eraser .drawing-canvas-container:hover {
+  cursor: url(../img/tools/eraser.png) 5 21, pointer;
+}
+
+/** 
+ * Tool section:
+ */
+
 #palette li {
   display : inline-block;
   height : 20px;
@@ -134,11 +154,55 @@ ul, li {
   margin : 5px;
 }
 
+.tools-container {
+  float: left;
+}
+
+.tools-container .tool-icon {
+  display: block;
+  float: left;
+  margin-right: 2px;
+}
+
+.tool-icon {
+  width: 30px;
+  height: 30px;
+  border: 5px solid #fff;
+}
+
+.tool-icon:hover {
+  border-color: #;
+}
+
+.tool-icon:hover {
+  cursor: pointer;
+  border: 5px solid #eee;
+}
+
+.tool-icon.selected {
+  cursor: auto;
+  border: 5px solid #ddd;
+}
+
+.tool-icon.tool-pen {
+  background: #fff url(../img/tools/pen.png) 3px 3px no-repeat;
+}
+
+.tool-icon.tool-paint-bucket {
+  background: #fff url(../img/tools/paint-bucket.png) 3px 3px no-repeat;
+}
+
+.tool-icon.tool-eraser {
+  background: #fff url(../img/tools/eraser.png) 3px 3px no-repeat;
+}
+
 #preview-fps {
   width : 200px;
 }
 
-/* User messages */
+/** 
+ * User messages 
+ */
 .user-message {
     position: fixed;
     bottom: 0;

index.html

@@ -23,12 +23,16 @@
     </ul>
   </div>
   <div class='main-panel'>
-    <div id="drawing-canvas-container" class="canvas-container">
+    <div id="drawing-canvas-container" class="drawing-canvas-container canvas-container">
       <div class="canvas-background"></div>
     </div>
-    <input id="color-picker" class="color" type="text" value=""/>
-    <ul id="palette" onclick="piskel.onPaletteClick(event)">
-    </ul>
+    <div id="tools-container" class="tools-container">
+      <div class="tool-icon tool-pen" data-tool-id="tool-pen"></div>
+      <div class="tool-icon tool-eraser" data-tool-id="tool-eraser"></div>
+      <div class="tool-icon tool-paint-bucket" data-tool-id="tool-paint-bucket"></div>
+      <input id="color-picker" class="color {hash:true}" type="text" value=""/>
+      <ul id="palette" onclick="piskel.onPaletteClick(event)"></ul>
+    </div>
     <div class='preview-container'>
       <div id='preview-canvas-container' class="canvas-container">
         <div class="canvas-background"></div>
@@ -42,9 +46,20 @@
   <div id="cursorInfo"></div>
   
   <script src="js/lib/jquery-1.8.0.js"></script>
-  <script src="js/lib/pubsub.js"></script>
+  <script src="js/lib/pubsub.js"></script> 
+  
+  <script src="js/Constants.js"></script>
+  <script src="js/Events.js"></script>
+  <script src="js/utils.js"></script>
+
   <script src="js/lib/jsColor_1_4_0/jscolor.js"></script>
+
   <script src="js/frameSheetModel.js"></script>
+  <script src="js/drawingtools/BaseTool.js"></script>
+  <script src="js/drawingtools/SimplePen.js"></script>
+  <script src="js/drawingtools/Eraser.js"></script>
+  <script src="js/drawingtools/PaintBucket.js"></script>
+  <script src="js/ToolSelector.js"></script>
   <script src="js/piskel.js"></script>
 </body>
 </html>

js/Constants.js

@@ -0,0 +1,3 @@
+var Constants = {
+	TRANSPARENT_COLOR : "tc"
+};

js/Events.js

@@ -0,0 +1,6 @@
+Events = {
+	
+	TOOL_SELECTED : "TOOL_SELECTED",
+	CANVAS_RIGHT_CLICKED: "CANVAS_RIGHT_CLICKED",
+	CANVAS_RIGHT_CLICK_RELEASED: "CANVAS_RIGHT_CLICK_RELEASED"
+};

js/ToolSelector.js

@@ -0,0 +1,84 @@
+/*
+ * @provide pskl.ToolSelector
+ *
+ * @require Constants
+ * @require Events
+ * @require pskl.drawingtools
+ */
+
+pskl.ToolSelector = (function() {
+	
+	var toolInstances = {
+		"simplePen" : new pskl.drawingtools.SimplePen(),
+		"eraser" : new pskl.drawingtools.Eraser(),
+		"paintBucket" : new pskl.drawingtools.PaintBucket()
+	};
+	var currentSelectedTool = toolInstances.simplePen;
+	var previousSelectedTool = toolInstances.simplePen;
+
+	var selectTool_ = function(tool) {
+
+		var maincontainer = $("body");
+        var previousSelectedToolClass = maincontainer.data("selected-tool-class");
+        if(previousSelectedToolClass) {
+          maincontainer.removeClass(previousSelectedToolClass);
+        }
+        maincontainer.addClass(toolBehavior.toolId);
+        $("#drawing-canvas-container").data("selected-tool-class", toolBehavior.toolId);
+	};
+
+	var activateToolOnStage_ = function(tool) {
+		var stage = $("body");
+        var previousSelectedToolClass = stage.data("selected-tool-class");
+        if(previousSelectedToolClass) {
+          stage.removeClass(previousSelectedToolClass);
+        }
+        stage.addClass(tool.toolId);
+        stage.data("selected-tool-class", tool.toolId);
+	};
+
+	var selectTool_ = function(tool) {
+		console.log("Selecting Tool:" , currentSelectedTool);
+		currentSelectedTool = tool;
+		activateToolOnStage_(currentSelectedTool);
+		$.publish(Events.TOOL_SELECTED, [tool]);
+	};
+
+	var onToolIconClicked_ = function(evt) {
+		var target = $(evt.target);
+		var clickedTool = target.closest(".tool-icon");
+
+		if(clickedTool.length) {
+			for(var tool in toolInstances) {
+				if (toolInstances[tool].toolId == clickedTool.data()["toolId"]) {
+					selectTool_(toolInstances[tool]);
+
+					// Show tool as selected:
+					$("#tools-container .tool-icon.selected").removeClass("selected");
+					clickedTool.addClass("selected");
+				}
+			}
+		}
+	};
+
+	return {
+		init: function() {
+			$.subscribe(Events.CANVAS_RIGHT_CLICKED, function() {
+				previousSelectedTool = currentSelectedTool;
+				currentSelectedTool = toolInstances.eraser;
+				$.publish(Events.TOOL_SELECTED, [currentSelectedTool]);
+			});
+
+			$.subscribe(Events.CANVAS_RIGHT_CLICK_RELEASED, function() {
+				currentSelectedTool = previousSelectedTool;
+				$.publish(Events.TOOL_SELECTED, [currentSelectedTool]);
+			});
+
+			// Set SimplePen as default selected tool:
+			selectTool_(toolInstances.simplePen);
+			
+			// Activate listener on tool panel:
+			$("#tools-container").click(onToolIconClicked_);
+		}
+	};
+})()

js/drawingtools/BaseTool.js

@@ -0,0 +1,39 @@
+/*
+ * @provide pskl.drawingtools.BaseTool
+ *
+ * @require pskl.utils
+ */
+(function() {
+	var ns = $.namespace("pskl.drawingtools");
+
+	ns.BaseTool = function() {};
+
+	ns.BaseTool.prototype.applyToolOnFrameAt = function(col, row, frame, color) {};
+	
+	ns.BaseTool.prototype.applyToolOnCanvasAt = function(col, row, canvas, color, dpi) {};
+	
+	ns.BaseTool.prototype.releaseToolAt = function() {};
+
+	ns.BaseTool.prototype.drawPixelInCanvas = function (col, row, canvas, color, dpi) {
+		var context = canvas.getContext('2d');
+		if(color == undefined || color == Constants.TRANSPARENT_COLOR) {
+			context.clearRect(col * dpi, row * dpi, dpi, dpi);   
+		} 
+		else {
+			// TODO(vincz): Remove this global access to piskel when Palette component is created.
+			piskel.addColorToPalette(color);
+			context.fillStyle = color;
+			context.fillRect(col * dpi, row * dpi, dpi, dpi);
+		}
+	};
+
+	ns.BaseTool.prototype.drawFrameInCanvas = function (frame, canvas, dpi) {
+	  var color;
+	  for(var col = 0, num_col = frame.length; col < num_col; col++) {
+	    for(var row = 0, num_row = frame[col].length; row < num_row; row++) {
+	      color = pskl.utils.normalizeColor(frame[col][row]);
+	      this.drawPixelInCanvas(col, row,canvas, color, dpi);
+	    }
+	  }
+	};
+})();

js/drawingtools/Eraser.js

@@ -0,0 +1,38 @@
+/*
+ * @provide pskl.drawingtools.Eraser
+ *
+ * @require Constants
+ * @require pskl.utils
+ */
+ (function() {
+	var ns = $.namespace("pskl.drawingtools");
+
+	ns.Eraser = function() {
+		this.toolId = "tool-eraser";
+	};
+
+	pskl.utils.inherit(ns.Eraser, ns.BaseTool);
+
+	/**
+	 * @override
+	 */
+	ns.Eraser.prototype.applyToolOnFrameAt = function(col, row, frame, color) {
+		frame[col][row] = Constants.TRANSPARENT_COLOR;
+	};
+
+	/**
+	 * @override
+	 */
+	ns.Eraser.prototype.applyToolOnCanvasAt = function(col, row, canvas, frame, color, dpi) {
+
+		this.drawPixelInCanvas(col, row, canvas, Constants.TRANSPARENT_COLOR, dpi);
+	};
+
+	/**
+	 * @override
+	 */
+	ns.Eraser.prototype.releaseToolAt = function() {
+		// Do nothing
+		console.log('Eraser release');
+	};
+})();

js/drawingtools/PaintBucket.js

@@ -0,0 +1,158 @@
+/*
+ * @provide pskl.drawingtools.PaintBucket
+ *
+ * @require pskl.utils
+ */
+(function() {
+	var ns = $.namespace("pskl.drawingtools");
+
+	ns.PaintBucket = function() {
+		this.toolId = "tool-paint-bucket"
+	};
+
+	pskl.utils.inherit(ns.PaintBucket, ns.BaseTool);
+
+	/**
+	 * @override
+	 */
+	ns.PaintBucket.prototype.applyToolOnFrameAt = function(col, row, frame, color) {};
+
+	/**
+	 * @override
+	 */
+	ns.PaintBucket.prototype.applyToolOnCanvasAt = function(col, row, canvas, frame, replacementColor, dpi) {
+		
+		var targetColor = pskl.utils.normalizeColor(frame[col][row]);
+		//this.recursiveFloodFill(frame, col, row, targetColor, replacementColor);
+		this.queueLinearFloodFill(frame, col, row, targetColor, replacementColor);
+		this.drawFrameInCanvas(frame, canvas, dpi);
+	};
+
+	/**
+	 * @override
+	 */
+	ns.PaintBucket.prototype.releaseToolAt = function() {
+		// Do nothing
+		console.log('PaintBucket release');
+	};
+
+	/**
+	 *  Flood-fill (node, target-color, replacement-color):
+		 1. Set Q to the empty queue.
+		 2. If the color of node is not equal to target-color, return.
+		 3. Add node to Q.
+		 4. For each element n of Q:
+		 5.     If the color of n is equal to target-color:
+		 6.         Set w and e equal to n.
+		 7.         Move w to the west until the color of the node to the west of w no longer matches target-color.
+		 8.         Move e to the east until the color of the node to the east of e no longer matches target-color.
+		 9.         Set the color of nodes between w and e to replacement-color.
+		10.         For each node n between w and e:
+		11.             If the color of the node to the north of n is target-color, add that node to Q.
+		12.             If the color of the node to the south of n is target-color, add that node to Q.
+		13. Continue looping until Q is exhausted.
+		14. Return.
+	 */
+	ns.PaintBucket.prototype.queueLinearFloodFill = function(frame, col, row, targetColor, replacementColor) {
+
+		var queue = [];
+		var dy = [-1, 0, 1, 0];
+	    var dx = [0, 1, 0, -1];
+
+	 	try {
+			if(frame[col][row] == replacementColor) {
+		 		return;
+		 	}
+		} catch(e) {
+			// Frame out of bound exception.
+		}
+
+		var isInFrameBound = function(frame_, col_, row_) {
+			if( col_ < 0 ||
+		 		col_ >= frame_.length ||
+		 		row_ < 0 ||
+		 		row_ >= frame_[0].length) {
+		 		return false;
+		 	}
+		 	return true;
+		}
+
+	 	queue.push({"col": col, "row": row});
+	 	var loopCount = 0;
+	 	var cellCount = frame.length * frame[0].length;
+	 	while(queue.length > 0) {
+			loopCount ++;
+
+	 		var currentItem = queue.pop();
+	 		frame[currentItem.col][currentItem.row] = replacementColor;
+	 		
+	 		for (var i = 0; i < 4; i++) {
+	 			var nextCol = currentItem.col + dx[i]
+	            var nextRow = currentItem.row + dy[i]
+				try {
+		            if (isInFrameBound(frame, nextCol, nextRow)  && frame[nextCol][nextRow] == targetColor) {
+		                queue.push({"col": nextCol, "row": nextRow });
+		            }
+		        } catch(e) {
+		        	// Frame out of bound exception.
+		        }
+	        }
+
+	 		// Security loop breaker:
+			if(loopCount > 10 * cellCount) {
+				console.log("loop breaker called")
+	 			break;			
+	 		}
+	 	}
+	}
+
+	/**
+	 * Basic Flood-fill implementation (Stack explosion !):
+	 * Flood-fill (node, target-color, replacement-color):
+	 *	1. If the color of node is not equal to target-color, return.
+	 *	2. Set the color of node to replacement-color.
+	 *	3. Perform Flood-fill (one step to the west of node, target-color, replacement-color).
+	 *	   Perform Flood-fill (one step to the east of node, target-color, replacement-color).
+	 *     Perform Flood-fill (one step to the north of node, target-color, replacement-color).
+	 *     Perform Flood-fill (one step to the south of node, target-color, replacement-color).
+	 *	4. Return.
+	 *
+	 *  @private
+	 */
+	ns.PaintBucket.prototype.recursiveFloodFill = function(frame, col, row, targetColor, replacementColor) {
+	 	
+	 	// Step 1:
+	 	if( col < 0 ||
+	 		col >= frame.length ||
+	 		row < 0 ||
+	 		row >= frame[0].length ||
+	  		frame[col][row] != targetColor) {
+	 		return;
+	 	}
+
+	 	// Step 2:
+	 	frame[col][row] = replacementColor;
+	 	
+	 	//Step 3:
+	 	this.simpleFloodFill(frame, col - 1, row, targetColor, replacementColor);
+	 	this.simpleFloodFill(frame, col + 1, row, targetColor, replacementColor);
+	 	this.simpleFloodFill(frame, col, row - 1, targetColor, replacementColor);
+	 	this.simpleFloodFill(frame, col, row + 1, targetColor, replacementColor);
+
+	 	return;
+	};
+
+})();
+
+
+
+
+
+
+
+
+
+
+
+
+

js/drawingtools/SimplePen.js

@@ -0,0 +1,41 @@
+/*
+ * @provide pskl.drawingtools.SimplePen
+ *
+ * @require pskl.utils
+ */
+(function() {
+	var ns = $.namespace("pskl.drawingtools");
+
+	ns.SimplePen = function() {
+		this.toolId = "tool-pen"
+	};
+
+	pskl.utils.inherit(ns.SimplePen, ns.BaseTool);
+	
+	/**
+	 * @override
+	 */
+	ns.SimplePen.prototype.applyToolOnFrameAt = function(col, row, frame, color) {
+		var color = pskl.utils.normalizeColor(color);
+	    if (color != frame[col][row]) {
+	        frame[col][row] = color;
+	    }
+	};
+
+	/**
+	 * @override
+	 */
+	ns.SimplePen.prototype.applyToolOnCanvasAt = function(col, row, canvas, frame, color, dpi) {
+
+		this.drawPixelInCanvas(col, row, canvas, color, dpi);
+	};
+
+	/**
+	 * @override
+	 */
+	ns.SimplePen.prototype.releaseToolAt = function() {
+		// Do nothing
+		console.log('SimplePen release');
+	};
+
+})();

js/frameSheetModel.js

@@ -1,3 +1,4 @@
+
 var FrameSheetModel = (function() {
     
     var inst;
@@ -5,12 +6,22 @@ var FrameSheetModel = (function() {
     var width;
     var height;
 
+    /**
+     * @private
+     */
     var createEmptyFrame_ = function() {
     	var emptyFrame = new Array(width);
 		for (var columnIndex=0; columnIndex < width; columnIndex++) {
 			emptyFrame[columnIndex] = new Array(height);
     	}
         return emptyFrame;
+    };
+
+    /**
+     * @private
+     */
+    var requestLocalStorageSave_ = function() {
+    	
     };
 
 	return {

js/lib/pubsub.js

@@ -7,6 +7,7 @@
   var o = $({});
 
   $.subscribe = function() {
+    console.log("SUBSCRIBE: " + arguments[0]);
     o.on.apply(o, arguments);
   };
 
@@ -15,7 +16,10 @@
   };
 
   $.publish = function() {
+    console.log("PUBLISH: " + arguments[0]);
     o.trigger.apply(o, arguments);
   };
 
-}(jQuery));
+}(jQuery));
+
+

js/piskel.js

@@ -1,8 +1,13 @@
-(function ($) {
+/**
+ * @require Constants
+ * @require Events
+ */
+$.namespace("pskl");
+
+(function () {
   var frameSheet,
 
       // Constants:
-      TRANSPARENT_COLOR = 'tc',
       DEFAULT_PEN_COLOR = '#000000',
       PISKEL_SERVICE_URL = 'http://2.piskel-app.appspot.com',
 
@@ -32,10 +37,12 @@
       animIndex = 0,
       penColor = DEFAULT_PEN_COLOR,
       paletteColors = [],
+      currentFrame = null;
+      currentToolBehavior = null,
 
       //utility
       _normalizeColor = function (color) {
-        if(color == undefined || color == TRANSPARENT_COLOR || color.indexOf("#") == 0) {
+        if(color == undefined || color == Constants.TRANSPARENT_COLOR || color.indexOf("#") == 0) {
           return color;
         } else {
           return "#" + color;
@@ -50,9 +57,9 @@
   var piskel = {
     init : function () {
       frameSheet = FrameSheetModel.getInstance(framePixelWidth, framePixelHeight);
-      this.setActiveFrame(0);
       frameSheet.addEmptyFrame();
-
+      this.setActiveFrame(0);
+      
       var frameId = this.getFrameIdFromUrl();
       if (frameId) {
         this.displayMessage("Loading animation with id : [" + frameId + "]");
@@ -63,12 +70,19 @@
     },
 
     finishInit : function () {
+
+      $.subscribe(Events.TOOL_SELECTED, function(evt, toolBehavior) {
+        console.log("Tool selected: ", toolBehavior);
+        currentToolBehavior = toolBehavior;
+      });
+
       this.initPalette();
       this.initDrawingArea();
       this.initPreviewSlideshow();
       this.initAnimationPreview();
       this.initColorPicker();
       this.initLocalStorageBackup();
+      pskl.ToolSelector.init();
 
       this.startAnimation();
     },
@@ -123,6 +137,17 @@
       }
     },
 
+    persistToLocalStorageRequest: function() {
+      // Persist to localStorage when drawing. We throttle localStorage accesses
+      // for high frequency drawing (eg mousemove).
+      if(localStorageThrottler == null) {
+          localStorageThrottler = window.setTimeout(function() {
+            piskel.persistToLocalStorage();
+            localStorageThrottler = null;
+          }, 1000);
+      }
+    },
+
     persistToLocalStorage: function() {
       console.log('persited')
       window.localStorage['snapShot'] = frameSheet.serialize();
@@ -139,13 +164,14 @@
 
     setActiveFrame: function(index) {
       activeFrameIndex = index;
+      currentFrame = frameSheet.getFrameByIndex(activeFrameIndex)
     },
 
     setActiveFrameAndRedraw: function(index) {
       this.setActiveFrame(index);
       
       // Update drawing canvas:
-      this.drawFrameToCanvas(frameSheet.getFrameByIndex(this.getActiveFrameIndex()), drawingAreaCanvas, drawingCanvasDpi);
+      this.drawFrameToCanvas(currentFrame, drawingAreaCanvas, drawingCanvasDpi);
       
       // Update slideshow:
       this.createPreviews();
@@ -162,21 +188,22 @@
     },
 
     initColorPicker: function() {
-      this.colorPicker = $('color-picker');
-      this.colorPicker.value = DEFAULT_PEN_COLOR;
-      this.colorPicker.addEventListener('change', this.onPickerChange.bind(this));
+      this.colorPicker = $('#color-picker');
+      this.colorPicker.val(DEFAULT_PEN_COLOR);
+      this.colorPicker.change(this.onPickerChange.bind(this));
     },
 
     onPickerChange : function(evt) {
-        penColor = _normalizeColor(this.colorPicker.value);
+        var inputPicker = $(evt.target);
+        penColor = _normalizeColor(inputPicker.val());
     },
 
     initPalette : function (color) {
-      paletteEl = $('palette');
+      paletteEl = $('#palette')[0];
     },
 
     addColorToPalette : function (color) {
-      if (color && color != TRANSPARENT_COLOR && paletteColors.indexOf(color) == -1) {
+      if (color && color != Constants.TRANSPARENT_COLOR && paletteColors.indexOf(color) == -1) {
         var colorEl = document.createElement("li");
         colorEl.setAttribute("data-color", color);
         colorEl.setAttribute("title", color);
@@ -187,7 +214,7 @@
     },
 
     initDrawingArea : function() {
-        drawingAreaContainer = $('drawing-canvas-container');
+        drawingAreaContainer = $('#drawing-canvas-container')[0];
 
         drawingAreaCanvas = document.createElement("canvas");
         drawingAreaCanvas.className = 'canvas';
@@ -201,14 +228,14 @@
         drawingAreaContainer.appendChild(drawingAreaCanvas);
 
         var body = document.getElementsByTagName('body')[0];
-        body.setAttribute('onmouseup', 'piskel.onCanvasMouseup(event)');
+        body.setAttribute('onmouseup', 'piskel.onDocumentBodyMouseup(event)');
         drawingAreaContainer.setAttribute('onmousedown', 'piskel.onCanvasMousedown(event)');
         drawingAreaContainer.setAttribute('onmousemove', 'piskel.onCanvasMousemove(event)');
-        this.drawFrameToCanvas(frameSheet.getFrameByIndex(this.getActiveFrameIndex()), drawingAreaCanvas, drawingCanvasDpi);
+        this.drawFrameToCanvas(currentFrame, drawingAreaCanvas, drawingCanvasDpi);
     },
 
     initPreviewSlideshow: function() {
-      var addFrameButton = $('add-frame-button');
+      var addFrameButton = $('#add-frame-button')[0];
       addFrameButton.addEventListener('mousedown', function() {
         frameSheet.addEmptyFrame();
         piskel.setActiveFrameAndRedraw(frameSheet.getFrameCount() - 1);
@@ -218,7 +245,7 @@
 
     initAnimationPreview : function() {
 
-      var previewAnimationContainer = $('preview-canvas-container');
+      var previewAnimationContainer = $('#preview-canvas-container')[0];
       previewCanvas = document.createElement('canvas');
       previewCanvas.className = 'canvas';
       previewAnimationContainer.setAttribute('style', 
@@ -230,7 +257,7 @@
 
     startAnimation : function () {
       var scope = this;
-      var animFPSTuner = $("preview-fps");
+      var animFPSTuner = $("#preview-fps")[0];
       var animPreviewFPS = parseInt(animFPSTuner.value, 10);
       var startPreviewRefresh = function() {
         return setInterval(scope.refreshAnimatedPreview, 1000/animPreviewFPS);
@@ -240,13 +267,13 @@
       animFPSTuner.addEventListener('change', function(evt) {
         window.clearInterval(refreshUpdater);
         animPreviewFPS = parseInt(animFPSTuner.value, 10);
-        $("display-fps").innerHTML = animPreviewFPS + " fps";
+        $("#display-fps").html(animPreviewFPS + " fps");
         refreshUpdater = startPreviewRefresh();
       });
     },
 
     createPreviews : function () {
-      var container = $('preview-list'), previewTile;
+      var container = $('#preview-list')[0], previewTile;
       container.innerHTML = "";
       for (var i = 0, l = frameSheet.getFrameCount(); i < l ; i++) {
         previewTile = this.createPreviewTile(i);
@@ -346,29 +373,35 @@
 
     onCanvasMousedown : function (event) {
       isClicked = true;
-      var coords = this.getRelativeCoordinates(event.clientX, event.clientY);
-      if(event.button == 0) {
-        this.drawAt(coords.x, coords.y, penColor);
-      } else {
-        // Right click used to delete.
+      
+      if(event.button == 2) { // right click
         isRightClicked = true;
-        this.drawAt(coords.x, coords.y, TRANSPARENT_COLOR);
+        $.publish(Events.CANVAS_RIGHT_CLICKED);
       }
+      var spriteCoordinate = this.getSpriteCoordinate(event);
+      currentToolBehavior.applyToolOnFrameAt(
+          spriteCoordinate.col, spriteCoordinate.row, currentFrame, penColor);
+      currentToolBehavior.applyToolOnCanvasAt(
+          spriteCoordinate.col, spriteCoordinate.row, drawingAreaCanvas, currentFrame, penColor, drawingCanvasDpi);
+
+      piskel.persistToLocalStorageRequest();
     },
 
     onCanvasMousemove : function (event) {
+
       //this.updateCursorInfo(event);
       if (isClicked) {
-        var coords = this.getRelativeCoordinates(event.clientX, event.clientY);
-        if(isRightClicked) {
-          this.drawAt(coords.x, coords.y, TRANSPARENT_COLOR);
-        } else {
-          this.drawAt(coords.x, coords.y, penColor);
-        }
+        var spriteCoordinate = this.getSpriteCoordinate(event)
+        currentToolBehavior.applyToolOnFrameAt(
+            spriteCoordinate.col, spriteCoordinate.row, currentFrame, penColor);
+        currentToolBehavior.applyToolOnCanvasAt(
+            spriteCoordinate.col, spriteCoordinate.row, drawingAreaCanvas, currentFrame, penColor, drawingCanvasDpi);
+
+        piskel.persistToLocalStorageRequest();
       }
     },
     
-    onCanvasMouseup : function (event) {
+    onDocumentBodyMouseup : function (event) {
       if(isClicked || isRightClicked) {
         // A mouse button was clicked on the drawing canvas before this mouseup event,
         // the user was probably drawing on the canvas.
@@ -376,49 +409,16 @@
         // of the drawing canvas.
         this.createPreviews();
       }
+      if(isRightClicked) {
+        $.publish(Events.CANVAS_RIGHT_CLICK_RELEASED);
+      }
       isClicked = false;
       isRightClicked = false;
+      var spriteCoordinate = this.getSpriteCoordinate(event)
+      currentToolBehavior.releaseToolAt(spriteCoordinate.col, spriteCoordinate.row, penColor);
     },
 
-    drawAt : function (x, y, color) {
-      var col = (x - x%drawingCanvasDpi) / drawingCanvasDpi;
-      var row = (y - y%drawingCanvasDpi) / drawingCanvasDpi;
-      
-      // Update model:
-      var currentFrame = frameSheet.getFrameByIndex(this.getActiveFrameIndex());
-      
-      // TODO: make a better accessor for pixel state update:
-      // TODO: Make pen color dynamic:
-      var color = _normalizeColor(color);
-      if (color != currentFrame[col][row]) {
-        currentFrame[col][row] = color;
-        this.drawPixelInCanvas(row, col, color, drawingAreaCanvas, drawingCanvasDpi);
-      }
-
-      // Persist to localStorage when drawing. We throttle localStorage accesses
-      // for high frequency drawing (eg mousemove).
-      if(localStorageThrottler == null) {
-          localStorageThrottler = window.setTimeout(function() {
-            piskel.persistToLocalStorage();
-            localStorageThrottler = null;
-          }, 1000);
-      }
-      
-           
-    },
-
-    drawPixelInCanvas : function (row, col, color, canvas, dpi) {
-      var context = canvas.getContext('2d');
-      if(color == undefined || color == TRANSPARENT_COLOR) {
-        context.clearRect(col * dpi, row * dpi, dpi, dpi);   
-      } else {
-        this.addColorToPalette(color);
-        context.fillStyle = color;
-        context.fillRect(col * dpi, row * dpi, dpi, dpi);
-      }
-    },
-
-    // TODO: move that to a FrameRenderer (/w cache) ?
+    // TODO(vincz/julz): Refactor to make this disappear in a big event-driven redraw loop 
     drawFrameToCanvas: function(frame, canvasElement, dpi) {
       var color;
       for(var col = 0, num_col = frame.length; col < num_col; col++) {
@@ -429,6 +429,17 @@
       }
     },
 
+    // TODO(vincz/julz): Refactor to make this disappear in a big event-driven redraw loop 
+    drawPixelInCanvas : function (row, col, color, canvas, dpi) {
+      var context = canvas.getContext('2d');
+      if(color == undefined || color == Constants.TRANSPARENT_COLOR) {
+        context.clearRect(col * dpi, row * dpi, dpi, dpi);   
+      } else {
+        context.fillStyle = color;
+        context.fillRect(col * dpi, row * dpi, dpi, dpi);
+      }
+    },
+
     onCanvasContextMenu : function (event) {
       event.preventDefault();
       event.stopPropagation();
@@ -437,11 +448,12 @@
     },
 
     onPaletteClick : function (event) {
-      var color = event.target.getAttribute("data-color");
+      var color = $(event.target).data("color");
       if (null !== color) {
-        var colorPicker = $('color-picker');
-        colorPicker.color.fromString(color);
-        this.onPickerChange();
+        //debugger;
+        var colorPicker = $('#color-picker');
+        colorPicker[0].color.fromString(color);
+        penColor = color;
       }
     },
     
@@ -453,11 +465,21 @@
       }
     },
 
+    getSpriteCoordinate : function(event) {
+        var coord = this.getRelativeCoordinates(event.x, event.y);
+        var coords = this.getRelativeCoordinates(event.clientX, event.clientY);
+        return {
+          "col" : (coords.x - coords.x%drawingCanvasDpi) / drawingCanvasDpi,
+          "row" : (coords.y - coords.y%drawingCanvasDpi) / drawingCanvasDpi
+        }
+    },
+
+    // TODO(julz): Create package ?
     storeSheet : function (event) {
       var xhr = new XMLHttpRequest();
       var formData = new FormData();
       formData.append('framesheet_content', frameSheet.serialize());
-      formData.append('fps_speed', $('preview-fps').value);
+      formData.append('fps_speed', $('#preview-fps').val());
       xhr.open('POST', PISKEL_SERVICE_URL + "/store", true);
       xhr.onload = function(e) {
         if (this.status == 200) {
@@ -478,4 +500,3 @@
   piskel.init();
 
 })(function(id){return document.getElementById(id)});
-//small change for checking my git setup :(

js/utils.js

@@ -0,0 +1,45 @@
+jQuery.namespace = function() {
+    var a=arguments, o=null, i, j, d;
+    for (i=0; i<a.length; i=i+1) {
+        d=a[i].split(".");
+        o=window;
+        for (j=0; j<d.length; j=j+1) {
+            o[d[j]]=o[d[j]] || {};
+            o=o[d[j]];
+        }
+    }
+    return o;
+};
+
+/*
+ * @provide pskl.utils
+ *
+ * @require Constants
+ */
+(function(ns) { // namespace: pskl.utils
+
+    var ns = $.namespace("pskl.utils");
+
+    ns.rgbToHex = function(r, g, b) {
+        if (r > 255 || g > 255 || b > 255)
+            throw "Invalid color component";
+        return ((r << 16) | (g << 8) | b).toString(16);
+    };
+
+    ns.normalizeColor = function (color) {
+      if(color == undefined || color == Constants.TRANSPARENT_COLOR || color.indexOf("#") == 0) {
+        return color;
+      } else {
+        return "#" + color;
+      }
+    };
+
+    ns.inherit = function(extendedObject, inheritFrom) {
+        extendedObject.prototype = Object.create(inheritFrom.prototype);
+        extendedObject.prototype.constructor = extendedObject;
+        //pskl.ToolBehavior.Eraser.prototype = Object.create(pskl.ToolBehavior.BaseTool.prototype);
+        //prototypeskl.ToolBehavior.Eraser.prototype.constructor = pskl.ToolBehavior.Eraser;
+    };
+
+})()
+