432 lines
9.4 KiB
JavaScript
432 lines
9.4 KiB
JavaScript
// Author: Jidong Xiao
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// first we need to create a stage
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var stage = new Konva.Stage({
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container: 'container', // id of container <div>
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width: 2000,
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height: 1000
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});
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var count=0;
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// then create layer
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var layer = new Konva.Layer();
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// add the layer to the stage
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stage.add(layer);
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// the rectangle which contains the vector.
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var rect2 = new Konva.Rect({
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x: 70,
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y: 360,
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id:"code_rec1",
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stroke: '#555',
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strokeWidth: 5,
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fill: '#ddd',
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width: 560,
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height: 250,
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shadowColor: 'black',
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shadowBlur: 10,
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shadowOffsetX: 10,
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shadowOffsetY: 10,
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shadowOpacity: 0.2,
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cornerRadius: 10,
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});
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layer.add(rect2);
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// the rectangle which contains the list.
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var rect3 = new Konva.Rect({
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x: 850,
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y: 360,
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id:"code_rec1",
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stroke: '#555',
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strokeWidth: 5,
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fill: '#ddd',
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width: 900,
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height: 250,
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shadowColor: 'black',
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shadowBlur: 10,
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shadowOffsetX: 10,
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shadowOffsetY: 10,
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shadowOpacity: 0.2,
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cornerRadius: 10,
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});
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layer.add(rect3);
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// Create a function to draw vector nodes
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function drawVecNode(x, y, label, id){
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// the rectangle represents list nodes.
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let rect1 = new Konva.Rect({
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x: x,
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y: y,
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id:"node_rec_" + id,
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stroke: '#555',
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strokeWidth: 5,
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fill: '#ddd',
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width: 100,
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height: 50,
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shadowColor: 'black',
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shadowBlur: 10,
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shadowOffsetX: 10,
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shadowOffsetY: 10,
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shadowOpacity: 0.2,
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cornerRadius: 10,
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});
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layer.add(rect1);
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var text = new Konva.Text({
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x: x + 45,
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y: y + 20,
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text: label,
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id: "node_text_" + id,
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fontSize: 20,
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fontFamily: 'Calibri',
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fill: 'black'
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});
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layer.add(text);
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var text1 = new Konva.Text({
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x: x + 45,
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y: y + 60,
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text: id - 1,
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id: "node_index_" + id,
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fontSize: 20,
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fontFamily: 'Calibri',
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fill: 'black'
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});
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layer.add(text1);
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}
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drawVecNode(100, 460, '7', 1);
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drawVecNode(200, 460, '5', 2);
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drawVecNode(300, 460, '8', 3);
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drawVecNode(400, 460, '1', 4);
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drawVecNode(500, 460, '9', 5);
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// Create a function to draw list nodes
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function drawListNode(x, y, label, id){
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// the rectangle represents list nodes.
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let rect1 = new Konva.Rect({
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x: x,
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y: y,
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id:"list_node_rec_" + id,
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stroke: '#555',
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strokeWidth: 5,
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fill: '#ddd',
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width: 100,
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height: 50,
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});
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layer.add(rect1);
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let rect2 = new Konva.Rect({
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x: x+100,
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y: y,
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id:"list_node_pointer_rec_" + id,
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stroke: '#555',
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strokeWidth: 5,
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fill: '#ddd',
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width: 20,
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height: 50,
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});
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layer.add(rect2);
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var text = new Konva.Text({
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x: x + 45,
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y: y + 20,
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text: label,
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id: "list_node_text_" + id,
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fontSize: 20,
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fontFamily: 'Calibri',
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fill: 'black'
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});
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layer.add(text);
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var arrow = new Konva.Arrow({
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points: [x+110, y+25, x+150, y+25],
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tension: 0.5,
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pointerLength: 10,
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pointerWidth: 10,
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id: "list_arrow_" + id,
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fill: 'green',
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stroke: 'green',
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strokeWidth: 5,
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});
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layer.add(arrow);
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}
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drawListNode(900, 460, '7', 1);
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drawListNode(1050, 460, '5', 2);
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drawListNode(1200, 460, '8', 3);
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drawListNode(1350, 460, '1', 4);
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drawListNode(1500, 460, '9', 4);
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var text_null = new Konva.Text({
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x: 1655,
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y: 475,
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text: "NULL",
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id: "node_text_null",
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fontSize: 20,
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fontFamily: 'Calibri',
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fill: 'black'
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});
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layer.add(text_null);
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var text_index = new Konva.Text({
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x: 220,
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y: 550,
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text: "index",
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id: "vec_index",
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fontSize: 26,
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fontFamily: 'Calibri',
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fill: '#17202a'
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});
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// the code rectangle.
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var rect1 = new Konva.Rect({
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x: 70,
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y: 60,
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id:"code_rec1",
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stroke: '#555',
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strokeWidth: 5,
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fill: '#ddd',
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width: 550,
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height: 180,
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shadowColor: 'black',
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shadowBlur: 10,
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shadowOffsetX: 10,
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shadowOffsetY: 10,
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shadowOpacity: 0.2,
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cornerRadius: 10,
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});
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layer.add(rect1)
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function makeCode(x,y,str,id) {
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return new Konva.Text({
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x: x,
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y: y,
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text: str,
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id: 'line'+id,
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fontSize: 18,
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fontFamily: 'Calibri',
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fill: '#000000',
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width: 550,
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padding: 20,
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});
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}
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var code=[
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"0. void erase_from_vector(unsigned int i, vector<int>& v) {",
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"1. \t\t\t for (int index = i; index < v.size()-1; index++) {",
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"2. \t\t\t \t\t\t v[index] = v[index+1];",
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"3. \t\t\t }",
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"4. \t\t\t v.pop_back();",
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"5. }",
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];
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function makeBold(id){
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for(let i=1; i<=code.length; i++){
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if(i!=id){
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stage.find('#line'+i).fontStyle('normal');
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}else{
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stage.find('#line'+id).fontStyle('bold');
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}
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}
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}
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// write the code fragment into the code box.
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for (let i=0;i<code.length;i++){
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// the array starts from index 0, but we want ids to be counted from index 1.
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let t=makeCode(80,60+(i*20),code[i],i+1);
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layer.add(t);
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}
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// draw the image
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layer.draw();
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stage.add(layer);
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var pc=1;
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// erase 5 from this vector.
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function vec_erase_nextstep() {
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if(pc == 1){
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makeBold(pc);
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layer.draw();
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pc=pc+1;
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}else if(pc == 2){
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makeBold(pc);
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layer.add(text_index);
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layer.draw();
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pc=pc+1;
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}else if(pc == 3){
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makeBold(pc);
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// highlight the one we are going to erase.
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stage.find('#node_rec_2').fill('#f4d03f');
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layer.draw();
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pc=pc+1;
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}else if(pc == 4){
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stage.find('#node_text_2').text('8');
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layer.draw();
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pc=pc+1;
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}else if(pc == 5){
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makeBold(4);
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layer.draw();
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pc=pc+1;
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}else if(pc == 6){
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makeBold(2);
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// increment x by 100.
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text_index.x(text_index.getX()+100);
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layer.draw();
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pc=pc+1;
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}else if(pc == 7){
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makeBold(3);
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// highlight the one we are going to update.
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stage.find('#node_rec_3').fill('#f4d03f');
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// and restore the previous one.
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stage.find('#node_rec_2').fill('#ddd');
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layer.draw();
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pc=pc+1;
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}else if(pc == 8){
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stage.find('#node_text_3').text('1');
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layer.draw();
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pc=pc+1;
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}else if(pc == 9){
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makeBold(4);
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layer.draw();
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pc=pc+1;
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}else if(pc == 10){
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makeBold(2);
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// increment x by 100.
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text_index.x(text_index.getX()+100);
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layer.draw();
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pc=pc+1;
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}else if(pc == 11){
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makeBold(3);
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// highlight the one we are going to update.
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stage.find('#node_rec_4').fill('#f4d03f');
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// and restore the previous one.
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stage.find('#node_rec_3').fill('#ddd');
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layer.draw();
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pc=pc+1;
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}else if(pc == 12){
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stage.find('#node_text_4').text('9');
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layer.draw();
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pc=pc+1;
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}else if(pc == 13){
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makeBold(4);
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layer.draw();
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pc=pc+1;
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}else if(pc == 14){
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makeBold(2);
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// increment x by 100.
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text_index.x(text_index.getX()+100);
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layer.draw();
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pc=pc+1;
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}else if(pc == 15){
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makeBold(4);
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layer.draw();
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pc=pc+1;
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}else if(pc == 16){
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makeBold(5);
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text_index.destroy();
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// highlight the one we are going to update.
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stage.find('#node_rec_5').fill('#f4d03f');
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// and restore the previous one.
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stage.find('#node_rec_4').fill('#ddd');
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layer.draw();
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pc=pc+1;
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}else if(pc == 17){
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var shape = stage.find('#node_rec_5');
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// let this object disappear in 2 seconds.
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shape.to({
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opacity: 0,
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duration: 2,
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});
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//stage.find('#node_rec_5').destroy();
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shape = stage.find('#node_text_5');
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shape.to({
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opacity: 0,
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duration: 2,
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});
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//stage.find('#node_text_5').destroy();
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shape = stage.find('#node_index_5');
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shape.to({
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opacity: 0,
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duration: 2,
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});
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//stage.find('#node_index_5').destroy();
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layer.draw();
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pc=pc+1;
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}else if(pc == 18){
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makeBold(6);
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layer.draw();
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pc=pc+1;
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}else if(pc == 19){
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alert("End of animation! Refresh the page if you want to re-run the animation.");
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layer.draw();
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pc=pc+1;
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}
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}
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var targetPoints = [1010, 485, 1100, 585, 1200, 485];
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var arrow1 = new Konva.Arrow({
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points: [1010, 485, 1030, 485, 1050, 485],
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tension: 0.5,
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pointerLength: 10,
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pointerWidth: 10,
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id: "arrow1",
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fill: 'green',
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stroke: 'green',
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strokeWidth: 5,
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});
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layer.add(arrow1);
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layer.draw();
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var arrow2 = stage.find('#arrow1');
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// Create the animation
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var tween = new Konva.Tween({
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node: arrow2,
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points: targetPoints,
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duration: 2, // animation duration in seconds
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easing: Konva.Easings.Linear
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});
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var pc2=1;
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// erase 5 from this list.
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function list_erase_nextstep() {
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if(pc2 == 1){
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stage.find('#list_arrow_1').destroy();
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// start the animation
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tween.play();
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//layer.add(arrow1);
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layer.draw();
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pc2=pc2+1;
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}else if(pc2 == 2){
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var shape = stage.find('#list_arrow_2');
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shape.to({
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opacity: 0,
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duration: 2,
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});
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shape = stage.find('#list_node_rec_2');
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shape.to({
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opacity: 0,
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duration: 2,
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});
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shape = stage.find('#list_node_pointer_rec_2');
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shape.to({
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opacity: 0,
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duration: 2,
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});
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shape = stage.find('#list_node_text_2');
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shape.to({
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opacity: 0,
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duration: 2,
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});
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layer.draw();
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pc2=pc2+1;
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}else if(pc2 == 3){
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alert("End of animation! Refresh the page if you want to re-run the animation.");
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layer.draw();
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pc2=pc2+1;
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}
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}
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/* vim: set ts=4: */
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