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POKineticJS: Saving to JSON: Objects saved more than once
 

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  1. POKineticJS: Saving to JSON: Objects saved more than once
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    <p><strong>big edit</strong></p> <p>Having analyzed my situation, it seems to be another question / another scenario, more generally about saving to json.</p> <p>So, I add a new Shapegroup to a layer on my stage with the following code:</p> <pre><code>... var selectedShape, json = null; ... function addNode(xPos, yPos) { //create the new node var node = new Kinetic.Circle({ id: 'myRect', x: xPos, y: yPos, radius: 30, fill: '#FFFFFF', stroke: '#000000', strokeWidth: 4, // test: "testattr" }); // create the label var label = new Kinetic.Text({ x: node.getX() - node.getRadius() + 10, y: node.getY() + node.getRadius() + 4, text: 'node', fontSize: 12, fontFamily: 'Arial', fill: 'black', }); // create group var nodeGroup = new Kinetic.Group({ draggable: true }); // add shapes to group nodeGroup.add(node); nodeGroup.add(label); // add group to the layer layer.add(nodeGroup); // add layer to the stage stage.add(layer); /* * Events for Nodes * all events for the actual states / nodes */ // mouse over =&gt; red stroke node.on('mouseover', function() { $('body').css('cursor', 'pointer'); this.setStroke('red'); layer.draw(); }); // mouse out =&gt; back in black node.on('mouseout', function() { if(selectedShape != this){ console.log('mouseout fired, Position: ' + node.getX()); $('body').css('cursor', 'default'); this.setStroke('#000000'); writeMessage(messageLayer, node.getX()); // just for testing purposes layer.draw(); } }); node.on('click tap', function(){ //relevant if(selectedShape != null){ $('body').css('cursor', 'default'); selectedShape.setStroke('#000000'); layer.draw(); } selectedShape = null; console.log('clicked'); selectedShape = this; this.setStroke('red'); layer.draw(); }); /* * Events for Node-labels * events for labels */ label.on('mouseover', function() { $('body').css('cursor', 'text'); this.setStroke('red'); this.setStrokeWidth(0.5) layer.draw(); }); label.on('mouseout', function() { $('body').css('cursor', 'default'); this.setStroke(''); this.setStrokeWidth(0); layer.draw(); }); //change the Label of a node, return 'node' if nothing entered or cancelled. label.on('click', function(){ var lblTxt = prompt('Neue Bezeichnung:', ''); if (lblTxt) { this.setText(lblTxt); } else { this.setText('node'); } layer.draw(); }); } </code></pre> <p>Having a button 'add new State' which actually adds a new group. Code: </p> <pre><code>$('#createNode').click(function(e){ addNode(125, 125); }); </code></pre> <p>And a Button "remove State" which removes a selected nodegroup. Code:</p> <pre><code>$('#removeNode').click(function(e){ if(selectedShape){ var selectedGroup = selectedShape.getParent(); selectedGroup.removeChildren(); selectedGroup.remove(); layer.draw(); } else { writeMessage(messageLayer, 'No Object chosen'); } }); </code></pre> <p>Also, there's a button 'save to json' where I want to save all the actually remaining Shapes on my Stage. Code:</p> <pre><code> $('#saveJSON').click(function(e){ json = null; json = stage.toJSON(); console.log(json); }); </code></pre> <p>So, now I test the following cases:</p> <p><strong>Case 1</strong>: Save empty stage</p> <p>JSON output:</p> <pre><code>{ "attrs": { "width": 960, "height": 600 }, "className": "Stage", "children": [ { "attrs": {}, "className": "Layer", "children": [] } ] </code></pre> <p>}</p> <p>Status: Seems to be OK.<em>So, the formatting issue with the last } depends on stackoverflow, it should (and is) actually be included to code tag.</em></p> <p><strong>Case 2</strong>: Add one Node after Saving empty Stage (double-clicking / tapping or using button is no difference here). Save again.</p> <p>JSON Output: </p> <pre><code>{ "attrs": { "width": 960, "height": 600 }, "className": "Stage", "children": [ { "attrs": {}, "className": "Layer", "children": [] }, { "attrs": {}, "className": "Layer", "children": [ { "attrs": { "draggable": true }, "className": "Group", "children": [ { "attrs": { "id": "myRect", "x": 125, "y": 125, "radius": 30, "fill": "#FFFFFF", "stroke": "#000000", "strokeWidth": 4, "test": "testattr" }, "className": "Circle" }, { "attrs": { "width": "auto", "height": "auto", "x": 105, "y": 159, "text": "node", "fontSize": 12, "fontFamily": "Arial", "fill": "black" }, "className": "Text" } ] } ] } ] </code></pre> <p>}</p> <p>Status: Why is there an empty Layer? But: One Group, two Objects, seems to be okay.</p> <p><strong>Case 3</strong></p> <p>Adding another Node. Save.</p> <p>JSON Output:</p> <pre><code>{ "attrs": { "width": 960, "height": 600 }, "className": "Stage", "children": [ { "attrs": {}, "className": "Layer", "children": [] }, { "attrs": {}, "className": "Layer", "children": [ { "attrs": { "draggable": true }, "className": "Group", "children": [ { "attrs": { "id": "myRect", "x": 125, "y": 125, "radius": 30, "fill": "#FFFFFF", "stroke": "#000000", "strokeWidth": 4, "test": "testattr" }, "className": "Circle" }, { "attrs": { "width": "auto", "height": "auto", "x": 105, "y": 159, "text": "node", "fontSize": 12, "fontFamily": "Arial", "fill": "black" }, "className": "Text" } ] }, { "attrs": { "draggable": true, "x": 206, "y": 75, "rotation": 0, "scaleX": 1, "scaleY": 1, "offsetX": 0, "offsetY": 0, "skewX": 0, "skewY": 0 }, "className": "Group", "children": [ { "attrs": { "id": "myRect", "x": 125, "y": 125, "radius": 30, "fill": "#FFFFFF", "stroke": "red", "strokeWidth": 4, "test": "testattr" }, "className": "Circle" }, { "attrs": { "width": "auto", "height": "auto", "x": 105, "y": 159, "text": "node", "fontSize": 12, "fontFamily": "Arial", "fill": "black" }, "className": "Text" } ] } ] }, { "attrs": {}, "className": "Layer", "children": [ { "attrs": { "draggable": true }, "className": "Group", "children": [ { "attrs": { "id": "myRect", "x": 125, "y": 125, "radius": 30, "fill": "#FFFFFF", "stroke": "#000000", "strokeWidth": 4, "test": "testattr" }, "className": "Circle" }, { "attrs": { "width": "auto", "height": "auto", "x": 105, "y": 159, "text": "node", "fontSize": 12, "fontFamily": "Arial", "fill": "black" }, "className": "Text" } ] }, { "attrs": { "draggable": true, "x": 206, "y": 75, "rotation": 0, "scaleX": 1, "scaleY": 1, "offsetX": 0, "offsetY": 0, "skewX": 0, "skewY": 0 }, "className": "Group", "children": [ { "attrs": { "id": "myRect", "x": 125, "y": 125, "radius": 30, "fill": "#FFFFFF", "stroke": "red", "strokeWidth": 4, "test": "testattr" }, "className": "Circle" }, { "attrs": { "width": "auto", "height": "auto", "x": 105, "y": 159, "text": "node", "fontSize": 12, "fontFamily": "Arial", "fill": "black" }, "className": "Text" } ] } ] } ] </code></pre> <p>}</p> <p>Status: Here you can see the first occurence of my problem: All the objects on my stage are doubled in my JSON file on two different layers. So they are tripled and so on when adding more objects. My Problem: I want to add a data model and use the data with a database, so I think this is pretty messy but I have no clue where I went wrong.</p> <p>** case 4** Removing all but one node from my stage:</p> <p>JSON Output:</p> <pre><code>{ "attrs": { "width": 960, "height": 600 }, "className": "Stage", "children": [ { "attrs": {}, "className": "Layer", "children": [] }, { "attrs": {}, "className": "Layer", "children": [ { "attrs": { "draggable": true }, "className": "Group", "children": [ { "attrs": { "id": "myRect", "x": 125, "y": 125, "radius": 30, "fill": "#FFFFFF", "stroke": "#000000", "strokeWidth": 4, "test": "testattr" }, "className": "Circle" }, { "attrs": { "width": "auto", "height": "auto", "x": 105, "y": 159, "text": "node", "fontSize": 12, "fontFamily": "Arial", "fill": "black" }, "className": "Text" } ] } ] }, { "attrs": {}, "className": "Layer", "children": [ { "attrs": { "draggable": true }, "className": "Group", "children": [ { "attrs": { "id": "myRect", "x": 125, "y": 125, "radius": 30, "fill": "#FFFFFF", "stroke": "#000000", "strokeWidth": 4, "test": "testattr" }, "className": "Circle" }, { "attrs": { "width": "auto", "height": "auto", "x": 105, "y": 159, "text": "node", "fontSize": 12, "fontFamily": "Arial", "fill": "black" }, "className": "Text" } ] } ] } ] </code></pre> <p>}</p> <p>Status: Again, the remaining nodes are doubled.</p> <p>** case 5**: Removing all nodes, having an empty stage again (after adding 2 nodes, then removing them)</p> <p>JSON Output:</p> <pre><code>{ "attrs": { "width": 960, "height": 600 }, "className": "Stage", "children": [ { "attrs": {}, "className": "Layer", "children": [] }, { "attrs": {}, "className": "Layer", "children": [] }, { "attrs": {}, "className": "Layer", "children": [] } ] </code></pre> <p>}</p> <p>Status: Stage is empty, but layers still remaining. Not that nice.</p> <p><strong>Conclusion</strong>: I think I'm doing something pretty wrong. It's a lot of JSON in this question and I hope someone actually reads through this and may help me figuring out what I did wrong. Would be so great.</p> <p>Best regards, Dominik</p> <p><strong>another edit</strong> Problem seems for me in addnode-function, using stage.add(layer); to add new shapegroups. A different way to add new groups to <em>one</em> layer would be much appreciated for I am fairly new to kineticjs and don't know it yet.</p>
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    1. COcould you include the toJSON string in the question and show what exactly is happening there
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    2. COyep, I'll edit it.
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    3. CO@Ani just edited my whole question, because it generally had nothing to do with my remove-mechanism. I hope now it gets somewhat clearer, although now there is a lot of JSON ;)
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