589 lines
14 KiB
JavaScript
589 lines
14 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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// 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 list, which is also the heap rectangle.
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var rect3 = new Konva.Rect({
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x: 1350,
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y: 220,
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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: 300,
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height: 535,
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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 stack nodes
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function drawStackNode(x, y, label, id, value){
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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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// name of the pointer
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var text1 = new Konva.Text({
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x: x - 50,
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y: y + 20,
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text: label,
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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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// content
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var text2 = new Konva.Text({
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x: x + 25,
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y: y + 20,
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text: value,
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id: "node_content_" + 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(text2);
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}
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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: 20,
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height: 30,
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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 + 20,
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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: 40,
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height: 30,
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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 + 5,
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y: y + 5,
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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+40, y+15, x+80, y+15],
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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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visible: false,
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});
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layer.add(arrow);
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}
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drawListNode(1360, 230, '7', 1);
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drawListNode(1450, 280, '5', 2);
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drawListNode(1400, 330, '8', 3);
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drawListNode(1450, 380, '1', 4);
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stage.find('#list_arrow_1').visible('true');
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stage.find('#list_arrow_2').visible('true');
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stage.find('#list_arrow_3').visible('true');
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stage.find('#list_arrow_4').visible('true');
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var targetPts = [1400, 245, 1420, 255, 1450, 295];
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stage.find('#list_arrow_1').points(targetPts);
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targetPts = [1490, 295, 1450, 318, 1370, 326, 1400, 345];
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stage.find('#list_arrow_2').points(targetPts);
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targetPts = [1440, 345, 1420, 378, 1450, 395];
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stage.find('#list_arrow_3').points(targetPts);
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targetPts = [1490, 395, 1475, 420, 1450, 558, 1682, 600];
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stage.find('#list_arrow_4').points(targetPts);
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var text_null = new Konva.Text({
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x: 1685,
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y: 575,
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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_stack = new Konva.Text({
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x: 295,
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y: 380,
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text: "Stack",
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id: "node_text_stack",
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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_stack);
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var text_heap = new Konva.Text({
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x: 855,
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y: 380,
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text: "Heap",
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id: "node_text_heap",
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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_heap);
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var arrow_p = new Konva.Arrow({
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points: [1100, 605, 1100, 535],
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tension: 0.5,
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pointerLength: 10,
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pointerWidth: 10,
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id: 'arrow_p',
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fill: 'yellow',
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stroke: 'yellow',
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strokeWidth: 5,
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});
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// the node code rectangle.
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var rect1 = new Konva.Rect({
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x: 10,
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y: 30,
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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: 220,
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height: 160,
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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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var nodeLabel = new Konva.Text({
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x: 25,
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y: 235,
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id:"node_label",
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text: "Node Definition",
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fontSize: 28,
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fontFamily: 'Calibri',
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fill: '#000000',
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});
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layer.add(nodeLabel);
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layer.add(rect1);
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function makeCodeBox(x, y){
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// the main code rectangle.
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var rect_list = new Konva.Rect({
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x: x,
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y: y,
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id:"code_rec_list",
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stroke: '#555',
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strokeWidth: 5,
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fill: '#ddd',
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width: 500,
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height: 230,
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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(rect_list);
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}
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makeCodeBox(280, 30);
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makeCodeBox(280, 280);
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makeCodeBox(280, 530);
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makeCodeBox(800, 30);
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makeCodeBox(800, 280);
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makeCodeBox(800, 530);
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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: 480,
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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. template <class T>",
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"1. class Node {",
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"2. public:",
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"3. \t\t\t T value;",
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"4. \t\t\t Node* next;",
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"5. }",
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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(10,30+(i*20),code[i],i+1);
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layer.add(t);
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}
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var code_list=[
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"0. void push_back(Node<T>* & head, const T& value) {",
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"1. \t\t\t if(head == NULL) {",
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"2. \t\t\t \t\t\t Node<T>* tmp = new Node<T>;",
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"3. \t\t\t \t\t\t tmp->value = value;",
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"4. \t\t\t \t\t\t tmp->next = NULL;",
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"5. \t\t\t \t\t\t head = tmp;",
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"6. \t\t\t } else {",
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"7. \t\t\t \t\t\t push_back(head->next, value);",
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"8. \t\t\t }",
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"9. }",
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];
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function makeBold_list(id, box){
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for(let i=1; i<=code_list.length; i++){
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if(i!=id){
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// regarding the parentheses, we must add the two numbers first.
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stage.find('#line'+(i+100*box)).fontStyle('normal');
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}else{
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stage.find('#line'+(i+100*box)).fontStyle('bold');
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}
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}
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}
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function makeCodeinBox(x,y,box){
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// write the code fragment into the code box.
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for (let i=0;i<code_list.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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// here we add 100 so as to differentiate from the code array.
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let t=makeCode(x,y+(i*20),code_list[i],i+1+100*box);
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layer.add(t);
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}
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}
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makeCodeinBox(290,30,1);
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makeCodeinBox(290,280,2);
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makeCodeinBox(290,530,3);
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makeCodeinBox(810,30,4);
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makeCodeinBox(810,280,5);
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makeCodeinBox(810,530,6);
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// draw the image
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drawStackNode(1685, 575, '', 0, 'NULL');
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drawStackNode(1370, 50, 'head', 1, ' ');
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var arrow1 = new Konva.Arrow({
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points: [1420, 75, 1320, 135, 1355, 245],
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tension: 0.5,
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pointerLength: 10,
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pointerWidth: 10,
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id: "arrow_1",
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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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var arrow2 = new Konva.Arrow({
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points: [1450, 145, 1335, 190, 1340, 455, 1485, 494],
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tension: 0.5,
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pointerLength: 10,
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pointerWidth: 10,
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id: "arrow_2",
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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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// arrow 1 represents head
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layer.add(arrow1);
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layer.draw();
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var pc=1;
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// creating the list.
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function nextstep() {
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if(pc == 1){
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makeBold_list(pc, 1);
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stage.find('#node_rec_1').fill('plum');
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//drawStackNode(270, 550, 'value', 2, '4');
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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_list(pc, 1);
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// the node we push front is called node 0.
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//drawListNode(600, 560, '?', 0);
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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_list(7, 1);
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//stage.find('#list_node_text_0').text('4');
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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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makeBold_list(8, 1);
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//targetPts = [680, 585, 565, 645, 460, 545, 495, 485];
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//stage.find('#list_arrow_0').points(targetPts);
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//stage.find('#list_arrow_0').visible('true');
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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_list(1, 2);
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//targetPts = [1420, 75, 1320, 135, 1450, 295];
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//stage.find('#arrow_1').points(targetPts);
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stage.find('#list_node_rec_1').fill('yellow');
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stage.find('#list_node_pointer_rec_1').fill('yellow');
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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_list(2, 2);
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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_list(7, 2);
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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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makeBold_list(8, 2);
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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_list(1, 3);
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stage.find('#list_node_rec_2').fill('orange');
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stage.find('#list_node_pointer_rec_2').fill('orange');
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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_list(2, 3);
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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_list(7, 3);
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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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makeBold_list(8, 3);
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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_list(1, 4);
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stage.find('#list_node_rec_3').fill('aqua');
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stage.find('#list_node_pointer_rec_3').fill('aqua');
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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_list(2, 4);
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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_list(7, 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_list(8, 4);
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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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makeBold_list(1, 5);
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stage.find('#list_node_rec_4').fill('pink');
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stage.find('#list_node_pointer_rec_4').fill('pink');
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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_list(2, 5);
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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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makeBold_list(7, 5);
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layer.draw();
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pc=pc+1;
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}else if(pc == 20){
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makeBold_list(8, 5);
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layer.draw();
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pc=pc+1;
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}else if(pc == 21){
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makeBold_list(1, 6);
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stage.find('#node_rec_0').fill('yellowgreen');
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//stage.find('#list_node_pointer_rec_5').fill('yellowgreen');
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layer.draw();
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pc=pc+1;
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}else if(pc == 22){
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makeBold_list(2, 6);
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layer.draw();
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pc=pc+1;
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}else if(pc == 23){
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makeBold_list(3, 6);
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drawStackNode(1400, 120, 'tmp', 2, ' ');
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// arrow 2 represents tmp
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layer.add(arrow2);
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drawListNode(1490, 480, '?', 5);
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layer.draw();
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pc=pc+1;
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}else if(pc == 24){
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makeBold_list(4, 6);
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// setting tmp's value
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stage.find('#list_node_text_5').text('4');
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layer.draw();
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pc=pc+1;
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}else if(pc == 25){
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makeBold_list(5, 6);
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targetPts = [1530, 495, 1540, 530, 1682, 600];
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// setting tmp's next to NULL
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stage.find('#list_arrow_5').points(targetPts);
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stage.find('#list_arrow_5').visible('true');
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layer.draw();
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pc=pc+1;
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}else if(pc == 26){
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makeBold_list(6, 6);
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// let current head point to the same location as tmp points to.
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targetPts = [1490, 395, 1475, 420, 1450, 458, 1492, 495];
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stage.find('#list_arrow_4').points(targetPts);
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layer.draw();
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pc=pc+1;
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}else if(pc == 27){
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makeBold_list(7, 6);
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layer.draw();
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pc=pc+1;
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}else if(pc == 28){
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// tmp goes out of scope
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var shape = stage.find('#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('#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('#node_index_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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makeBold_list(10, 6);
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layer.draw();
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pc=pc+1;
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}else if(pc == 29){
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makeBold_list(-1, 6);
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layer.draw();
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pc=pc+1;
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}else if(pc == 30){
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makeBold_list(9, 5);
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layer.draw();
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pc=pc+1;
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}else if(pc == 31){
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makeBold_list(10, 5);
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layer.draw();
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pc=pc+1;
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}else if(pc == 32){
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makeBold_list(-1, 5);
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layer.draw();
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pc=pc+1;
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}else if(pc == 33){
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makeBold_list(9, 4);
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layer.draw();
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pc=pc+1;
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}else if(pc == 34){
|
|
makeBold_list(10, 4);
|
|
layer.draw();
|
|
pc=pc+1;
|
|
}else if(pc == 35){
|
|
makeBold_list(-1, 4);
|
|
layer.draw();
|
|
pc=pc+1;
|
|
}else if(pc == 36){
|
|
makeBold_list(9, 3);
|
|
layer.draw();
|
|
pc=pc+1;
|
|
}else if(pc == 37){
|
|
makeBold_list(10, 3);
|
|
layer.draw();
|
|
pc=pc+1;
|
|
}else if(pc == 38){
|
|
makeBold_list(-1, 3);
|
|
layer.draw();
|
|
pc=pc+1;
|
|
}else if(pc == 39){
|
|
makeBold_list(9, 2);
|
|
layer.draw();
|
|
pc=pc+1;
|
|
}else if(pc == 40){
|
|
makeBold_list(10, 2);
|
|
layer.draw();
|
|
pc=pc+1;
|
|
}else if(pc == 41){
|
|
makeBold_list(-1, 2);
|
|
layer.draw();
|
|
pc=pc+1;
|
|
}else if(pc == 42){
|
|
makeBold_list(9, 1);
|
|
layer.draw();
|
|
pc=pc+1;
|
|
}else if(pc == 43){
|
|
makeBold_list(10, 1);
|
|
layer.draw();
|
|
pc=pc+1;
|
|
}else if(pc == 44){
|
|
makeBold_list(-1, 1);
|
|
layer.draw();
|
|
pc=pc+1;
|
|
}else if(pc == 45){
|
|
makeBold_list(2, 3);
|
|
alert("End of animation! Refresh the page if you want to re-run the animation.");
|
|
layer.draw();
|
|
pc=pc+1;
|
|
}
|
|
}
|
|
|
|
/* vim: set ts=4: */
|