JamesFlare/CSCI-1200
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adding level order traversal animation

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This commit is contained in:
Jidong Xiao
2023-11-09 22:44:30 -05:00
parent 8eb70c3629
commit 299a95f3c4
1 changed files with 443 additions and 179 deletions
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616
animations/trees/level_order/level_order.js
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@@ -10,21 +10,6 @@ var stage = new Konva.Stage({
var layer = new Konva.Layer();
stage.add(layer);
function makeNULL(x,y) {
let text = new Konva.Text({
x: x,
y: y,
text: 'NULL',
id: 'nullptr',
fontSize: 18,
fontFamily: 'Calibri',
fill: '#000000',
width: 400,
padding: 20,
});
layer.add(text);
}
// Create a function to draw nodes
function drawNode(x, y, label) {
var circle = new Konva.Circle({
@@ -232,8 +217,11 @@ function makeBuffer(xstart,ystart,bufferSize,w,h) {
}
}
/* this array displays the input string */
makeBuffer(100,240,9,50,50); // a buffer whose size is 9, the array has 8 elements, and we need a space for '\0'.
// representing the queue
makeBuffer(900,240,7,100,100); // a buffer whose size is 9, the array has 8 elements, and we need a space for '\0'.
makeBuffer(1200,440,1,100,100); // a buffer whose size is 9, the array has 8 elements, and we need a space for '\0'.
makeText(1100,460,"current",'cur');
makeText(1220,460,"",'cur_val');
drawNode(650, 100, '5');
layer.add(line1);
@@ -254,176 +242,452 @@ layer.add(line8);
line8.hide();
layer.draw();
var key;
var old_key = 0;
function start() {
key = document.getElementById('textIn').value;
stage.find('#nullptr').hide();
if(hidden_2==1){
// show line 6
line6.show();
// show 2
stage.find('#node_'+2).show();
stage.find('#node_text_'+2).show();
hidden_2=0;
// reset 1
stage.find('#node_'+1).x(200);
stage.find('#node_'+1).y(400);
stage.find('#node_text_'+1).x(195);
stage.find('#node_text_'+1).y(390);
}
if(hidden_7==1){
// show line 7
line7.show();
// show 7
stage.find('#node_'+7).show();
stage.find('#node_text_'+7).show();
hidden_7=0;
// reset 8
stage.find('#node_'+8).x(800);
stage.find('#node_'+8).y(400);
stage.find('#node_text_'+8).x(795);
stage.find('#node_text_'+8).y(390);
}
if(hidden_6==1){
line5.show();
stage.find('#node_'+6).show();
stage.find('#node_text_'+6).show();
// move 7 and 8 back
stage.find('#node_'+7).x(700);
stage.find('#node_'+7).y(300);
stage.find('#node_text_'+7).x(695);
stage.find('#node_text_'+7).y(290);
stage.find('#node_'+8).x(800);
stage.find('#node_'+8).y(400);
stage.find('#node_text_'+8).x(795);
stage.find('#node_text_'+8).y(390);
line7.show();
line8.hide();
hidden_6=0;
}
if(deleted_3==1){
// swap 3 and 4 back
stage.find('#node_'+3).x(500);
stage.find('#node_'+3).y(200);
stage.find('#node_text_'+3).x(495);
stage.find('#node_text_'+3).y(190);
stage.find('#node_'+4).x(600);
stage.find('#node_'+4).y(300);
stage.find('#node_text_'+4).x(595);
stage.find('#node_text_'+4).y(290);
deleted_3=0;
// reset pc
pc=1;
}
if(old_key == 0){
}else{
// un-highlight the old node.
stage.find('#node_'+old_key).fill("lightgray");
// show the old node
stage.find('#node_'+old_key).show();
stage.find('#node_text_'+old_key).show();
}
// highlight this node.
stage.find('#node_'+key).fill("red");
layer.draw();
old_key = key;
console.log("start");
var console_box = new Konva.Rect({
x: 1450,
y: 0,
id:"console_box",
stroke: '#ffa07a',
strokeWidth: 5,
fill: '#ddd',
width: 100,
height: 200,
shadowColor: 'black',
shadowBlur: 10,
shadowOffsetX: 10,
shadowOffsetY: 10,
shadowOpacity: 0.2,
cornerRadius: 10,
});
var console_msg=["$",
"",
"",
"",
"",
"",
"",
""];
function updateConsoleMsg(msg,i) {
stage.find('#text_console_msg'+i).text(msg);
}
makeNULL(130,390);
var hidden_2=0;
var hidden_6=0;
var hidden_7=0;
var deleted_3=0;
function makeConsoleText(x,y,str,id) {
let text = new Konva.Text({
x: x,
y: y,
text: str,
id: 'text_'+id,
fontSize: 16,
fontFamily: 'Calibri',
fill: '#000000',
width: 400,
padding: 20,
// align: 'center',
});
layer.add(text);
}
var msg_box = new Konva.Rect({
x: 900,
y: 0,
id:"message_box",
stroke: '#ffa07a',
strokeWidth: 5,
fill: '#ddd',
width: 400,
height: 200,
shadowColor: 'black',
shadowBlur: 10,
shadowOffsetX: 10,
shadowOffsetY: 10,
shadowOpacity: 0.2,
cornerRadius: 10,
});
var message=["push 5 into the queue.",
"",
"",
""];
function updateMessage(msg,i) {
stage.find('#text_msg'+i).text(msg);
}
function clearMessage() {
updateMessage("",0);
updateMessage("",1);
updateMessage("",2);
updateMessage("",3);
}
function makeText(x,y,str,id) {
let text = new Konva.Text({
x: x,
y: y,
text: str,
id: 'text_'+id,
fontSize: 18,
fontFamily: 'Calibri',
fill: '#000000',
width: 400,
padding: 20,
// align: 'center',
});
layer.add(text);
}
makeText(920,260,"",1);
makeText(1020,260,"",2);
makeText(1120,260,"",3);
makeText(1220,260,"",4);
makeText(1320,260,"",5);
makeText(1420,260,"",6);
makeText(1520,260,"",7);
//console.log("start");
var pc=1;
function nextstep() {
if(key == 1){
// hide this node, and show a NULL pointer.
stage.find('#node_'+key).hide();
stage.find('#node_text_'+key).hide();
stage.find('#nullptr').x(130);
stage.find('#nullptr').y(390);
stage.find('#nullptr').show();
layer.draw();
}else if(key == 2){
line6.hide();
stage.find('#node_'+key).hide();
stage.find('#node_text_'+key).hide();
stage.find('#node_'+1).x(350);
stage.find('#node_'+1).y(300);
stage.find('#node_text_'+1).x(345);
stage.find('#node_text_'+1).y(290);
hidden_2=1;
layer.draw();
}else if(key == 3){
if(pc==1){
// swap 3 and 4
stage.find('#node_'+4).x(500);
stage.find('#node_'+4).y(200);
stage.find('#node_text_'+4).x(495);
stage.find('#node_text_'+4).y(190);
stage.find('#node_'+3).x(600);
stage.find('#node_'+3).y(300);
stage.find('#node_text_'+3).x(595);
stage.find('#node_text_'+3).y(290);
deleted_3=1;
if(pc == 1){
/* draw the message box */
layer.add(msg_box);
layer.add(console_box);
makeConsoleText(1450,0,console_msg[0],'console_msg0');
makeConsoleText(1450,20,console_msg[1],'console_msg1');
makeConsoleText(1450,40,console_msg[2],'console_msg2');
makeConsoleText(1450,60,console_msg[3],'console_msg3');
makeConsoleText(1450,80,console_msg[4],'console_msg4');
makeConsoleText(1450,100,console_msg[5],'console_msg5');
makeConsoleText(1450,120,console_msg[6],'console_msg6');
makeConsoleText(1450,140,console_msg[7],'console_msg7');
makeText(900,0,message[0],'msg0');
makeText(900,50,message[1],'msg1');
makeText(900,100,message[2],'msg2');
makeText(900,150,message[3],'msg3');
layer.draw();
pc = pc + 1;
}else if(pc==2){
// hide this node, and show a NULL pointer.
stage.find('#node_'+key).hide();
stage.find('#node_text_'+key).hide();
stage.find('#nullptr').x(535);
stage.find('#nullptr').y(260);
stage.find('#nullptr').show();
}else if(pc == 2){
// push 5 into queue
stage.find('#node_'+5).fill('#FF5733');
stage.find('#text_'+1).text('5');
layer.draw();
pc = pc + 1;
}
}else if(key == 4){
// hide this node, and show a NULL pointer.
stage.find('#node_'+key).hide();
stage.find('#node_text_'+key).hide();
stage.find('#nullptr').x(535);
stage.find('#nullptr').y(260);
stage.find('#nullptr').show();
}else if(pc == 3){
updateMessage("if queue is not empty,",0);
updateMessage("starting from the front,",1);
updateMessage("pop all current elements from the queue,",2);
updateMessage("and print each of them.",3);
layer.draw();
}else if(key == 5){
}else if(key == 6){
line5.hide();
stage.find('#node_'+key).hide();
stage.find('#node_text_'+key).hide();
// move 7 and 8
stage.find('#node_'+7).x(800);
stage.find('#node_'+7).y(200);
stage.find('#node_text_'+7).x(795);
stage.find('#node_text_'+7).y(190);
stage.find('#node_'+8).x(950);
stage.find('#node_'+8).y(300);
stage.find('#node_text_'+8).x(945);
stage.find('#node_text_'+8).y(290);
line7.hide();
line8.show();
hidden_6=1;
pc = pc + 1;
}else if(pc == 4){
// pop 5 out of queue
// update current to 5
stage.find('#text_cur_val').text('5');
// mark 5 as current
stage.find('#node_'+5).fill('#FFC300');
layer.draw();
}else if(key == 7){
line7.hide();
stage.find('#node_'+key).hide();
stage.find('#node_text_'+key).hide();
stage.find('#node_'+8).x(700);
stage.find('#node_'+8).y(300);
stage.find('#node_text_'+8).x(695);
stage.find('#node_text_'+8).y(290);
hidden_7=1;
pc = pc + 1;
}else if(pc == 5){
stage.find('#text_'+1).text('');
// print 5
updateConsoleMsg("$ 5",0);
layer.draw();
}else if(key == 8){
// hide this node, and show a NULL pointer.
stage.find('#node_'+key).hide();
stage.find('#node_text_'+key).hide();
stage.find('#nullptr').x(770);
stage.find('#nullptr').y(390);
stage.find('#nullptr').show();
pc = pc + 1;
}else if(pc == 6){
clearMessage();
updateMessage("push current's left child (if exists) into queue.",0);
layer.draw();
//alert("End of animation! Refresh the page if you want to re-run the animation.");
pc = pc + 1;
}else if(pc == 7){
// push 3 into queue
stage.find('#node_'+3).fill('#FF5733');
stage.find('#text_'+1).text('3');
layer.draw();
pc = pc + 1;
}else if(pc == 8){
updateMessage("push current's right child (if exists) into queue.",0);
layer.draw();
pc = pc + 1;
}else if(pc == 9){
// push 6 into queue
stage.find('#node_'+6).fill('#FF5733');
stage.find('#text_'+1).text('6');
stage.find('#text_'+2).text('3');
layer.draw();
pc = pc + 1;
}else if(pc == 10){
// mark as printed, and also, children in queue already
stage.find('#node_'+5).fill('#900C3F');
layer.draw();
pc = pc + 1;
}else if(pc == 11){
updateMessage("if queue is not empty,",0);
updateMessage("starting from the front,",1);
updateMessage("pop all current elements from the queue,",2);
updateMessage("and print each of them.",3);
layer.draw();
pc = pc + 1;
}else if(pc == 12){
// pop 3 out of queue
// update current to 3
stage.find('#text_'+2).text('');
stage.find('#text_cur_val').text('3');
// mark 3 as current
stage.find('#node_'+3).fill('#FFC300');
layer.draw();
pc = pc + 1;
}else if(pc == 13){
// print 3
updateConsoleMsg("$ 3",1);
layer.draw();
pc = pc + 1;
}else if(pc == 14){
clearMessage();
updateMessage("push current's left child (if exists) into queue.",0);
layer.draw();
pc = pc + 1;
}else if(pc == 15){
// push 2 into queue
stage.find('#node_'+2).fill('#FF5733');
stage.find('#text_'+1).text('2');
stage.find('#text_'+2).text('6');
layer.draw();
pc = pc + 1;
}else if(pc == 16){
updateMessage("push current's right child (if exists) into queue.",0);
layer.draw();
pc = pc + 1;
}else if(pc == 17){
// push 4 into queue
stage.find('#node_'+4).fill('#FF5733');
stage.find('#text_'+1).text('4');
stage.find('#text_'+2).text('2');
stage.find('#text_'+3).text('6');
layer.draw();
pc = pc + 1;
}else if(pc == 18){
// mark 3 as printed, and also, children in queue already
stage.find('#node_'+3).fill('#900C3F');
layer.draw();
pc = pc + 1;
}else if(pc == 19){
// pop 6 out of queue
// update current to 6
stage.find('#text_'+3).text('');
stage.find('#text_cur_val').text('6');
// mark 6 as current
stage.find('#node_'+6).fill('#FFC300');
layer.draw();
pc = pc + 1;
}else if(pc == 20){
// print 6
updateConsoleMsg("$ 6",2);
layer.draw();
pc = pc + 1;
}else if(pc == 21){
updateMessage("push current's left child (if exists) into queue.",0);
layer.draw();
pc = pc + 1;
}else if(pc == 22){
// push 7 into queue
stage.find('#node_'+7).fill('#FF5733');
stage.find('#text_'+1).text('7');
stage.find('#text_'+2).text('4');
stage.find('#text_'+3).text('2');
layer.draw();
pc = pc + 1;
}else if(pc == 23){
// current node, 6, doesn't have a right child.
updateMessage("push current's right child (if exists) into queue.",0);
layer.draw();
pc = pc + 1;
}else if(pc == 24){
// mark 6 as printed, and also, children in queue already
stage.find('#node_'+6).fill('#900C3F');
layer.draw();
pc = pc + 1;
}else if(pc == 25){
updateMessage("if queue is not empty,",0);
updateMessage("starting from the front,",1);
updateMessage("pop all current elements from the queue,",2);
updateMessage("and print each of them.",3);
layer.draw();
pc = pc + 1;
}else if(pc == 26){
// pop 2 out of queue
// update current to 2
stage.find('#text_'+3).text('');
stage.find('#text_cur_val').text('2');
// mark 2 as current
stage.find('#node_'+2).fill('#FFC300');
layer.draw();
pc = pc + 1;
}else if(pc == 27){
// print 2
updateConsoleMsg("$ 2",3);
layer.draw();
pc = pc + 1;
}else if(pc == 28){
clearMessage();
updateMessage("push current's left child (if exists) into queue.",0);
layer.draw();
pc = pc + 1;
}else if(pc == 29){
// push 1 into queue
stage.find('#node_'+1).fill('#FF5733');
stage.find('#text_'+1).text('1');
stage.find('#text_'+2).text('7');
stage.find('#text_'+3).text('4');
layer.draw();
pc = pc + 1;
}else if(pc == 30){
// current node, 2, doesn't have a right child.
updateMessage("push current's right child (if exists) into queue.",0);
layer.draw();
pc = pc + 1;
}else if(pc == 31){
// mark 2 as printed, and also, children in queue already
stage.find('#node_'+2).fill('#900C3F');
layer.draw();
pc = pc + 1;
}else if(pc == 32){
// pop 4 out of queue
// update current to 4
stage.find('#text_'+3).text('');
stage.find('#text_cur_val').text('4');
// mark 4 as current
stage.find('#node_'+4).fill('#FFC300');
layer.draw();
pc = pc + 1;
}else if(pc == 33){
// print 4
updateConsoleMsg("$ 4",4);
layer.draw();
pc = pc + 1;
}else if(pc == 34){
// current node, 4, doesn't have a left child.
updateMessage("push current's left child (if exists) into queue.",0);
layer.draw();
pc = pc + 1;
}else if(pc == 35){
// current node, 4, doesn't have a right child.
updateMessage("push current's right child (if exists) into queue.",0);
layer.draw();
pc = pc + 1;
}else if(pc == 36){
// mark 4 as printed, and also, children in queue already
stage.find('#node_'+4).fill('#900C3F');
layer.draw();
pc = pc + 1;
}else if(pc == 37){
// pop 7 out of queue
// update current to 7
stage.find('#text_'+2).text('');
stage.find('#text_cur_val').text('7');
// mark 7 as current
stage.find('#node_'+7).fill('#FFC300');
layer.draw();
pc = pc + 1;
}else if(pc == 38){
// print 7
updateConsoleMsg("$ 7",5);
layer.draw();
pc = pc + 1;
}else if(pc == 39){
// current node, 7, doesn't have a left child.
updateMessage("push current's left child (if exists) into queue.",0);
layer.draw();
pc = pc + 1;
}else if(pc == 40){
// current node, 7, does have a right child.
updateMessage("push current's right child (if exists) into queue.",0);
layer.draw();
pc = pc + 1;
}else if(pc == 41){
// push 8 into queue
stage.find('#node_'+8).fill('#FF5733');
stage.find('#text_'+1).text('8');
stage.find('#text_'+2).text('1');
layer.draw();
pc = pc + 1;
}else if(pc == 42){
// mark 7 as printed, and also, children in queue already
stage.find('#node_'+7).fill('#900C3F');
layer.draw();
pc = pc + 1;
}else if(pc == 43){
updateMessage("if queue is not empty,",0);
updateMessage("starting from the front,",1);
updateMessage("pop all current elements from the queue,",2);
updateMessage("and print each of them.",3);
layer.draw();
pc = pc + 1;
}else if(pc == 44){
// pop 1 out of queue
// update current to 1
stage.find('#text_'+2).text('');
stage.find('#text_cur_val').text('1');
// mark 1 as current
stage.find('#node_'+1).fill('#FFC300');
layer.draw();
pc = pc + 1;
}else if(pc == 45){
// print 1
updateConsoleMsg("$ 1",6);
layer.draw();
pc = pc + 1;
}else if(pc == 46){
clearMessage();
// current node, 1, doesn't have a left child.
updateMessage("push current's left child (if exists) into queue.",0);
layer.draw();
pc = pc + 1;
}else if(pc == 47){
// current node, 1, doesn't have a right child.
updateMessage("push current's right child (if exists) into queue.",0);
layer.draw();
pc = pc + 1;
}else if(pc == 48){
// mark 1 as printed, and also, children in queue already
stage.find('#node_'+1).fill('#900C3F');
layer.draw();
pc = pc + 1;
}else if(pc == 49){
// pop 8 out of queue
// update current to 8
stage.find('#text_'+1).text('');
stage.find('#text_cur_val').text('8');
// mark 8 as current
stage.find('#node_'+8).fill('#FFC300');
layer.draw();
pc = pc + 1;
}else if(pc == 50){
// print 8
updateConsoleMsg("$ 8",7);
layer.draw();
pc = pc + 1;
}else if(pc == 51){
// current node, 8, doesn't have a left child.
updateMessage("push current's left child (if exists) into queue.",0);
layer.draw();
pc = pc + 1;
}else if(pc == 52){
// current node, 8, doesn't have a right child.
updateMessage("push current's right child (if exists) into queue.",0);
layer.draw();
pc = pc + 1;
}else if(pc == 53){
// mark 8 as printed, and also, children in queue already
stage.find('#node_'+8).fill('#900C3F');
layer.draw();
pc = pc + 1;
}else if(pc == 54){
clearMessage();
updateMessage("queue is empty, job done!",0);
layer.draw();
pc = pc + 1;
}
}
//alert("End of animation! Refresh the page if you want to re-run the animation.");