361 lines
7.8 KiB
JavaScript
361 lines
7.8 KiB
JavaScript
// Author: Jidong Xiao
|
|
// first we need to create a stage
|
|
var stage = new Konva.Stage({
|
|
container: 'container', // id of container <div>
|
|
width: 2000,
|
|
height: 1000
|
|
});
|
|
|
|
var count=0;
|
|
|
|
// then create layer
|
|
var layer = new Konva.Layer();
|
|
|
|
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);
|
|
}
|
|
|
|
function makeContent(x,y,str,id) {
|
|
let content = new Konva.Text({
|
|
x: x,
|
|
y: y,
|
|
text: str,
|
|
id: id,
|
|
fontSize: 18,
|
|
fontFamily: 'Calibri',
|
|
fill: '#900C3F',
|
|
width: 400,
|
|
padding: 20,
|
|
});
|
|
layer.add(content);
|
|
}
|
|
|
|
function makeMemory(xstart,ystart,bufferSize,w,h) {
|
|
for(let i=0;i<bufferSize;i++){
|
|
let tr = new Konva.Rect({
|
|
x: xstart,
|
|
y: ystart+i*h,
|
|
id:"brec"+i,
|
|
stroke: '#343434',
|
|
strokeWidth: 5,
|
|
fill: '#ddd',
|
|
width: w,
|
|
height: h,
|
|
shadowColor: 'black',
|
|
shadowBlur: 10,
|
|
shadowOffsetX: 10,
|
|
shadowOffsetY: 10,
|
|
shadowOpacity: 0.2,
|
|
});
|
|
layer.add(tr);
|
|
} // end of for loop
|
|
}
|
|
|
|
makeMemory(800,0,6,200,100);
|
|
makeText(800+250, -20, "0x1000", "addr0");
|
|
makeText(800+250, 80, "0x1008", "addr2");
|
|
makeText(800+250, 180, "0x1010", "addr3");
|
|
makeText(800+250, 280, "0x1018", "addr4");
|
|
makeText(800+250, 380, "0x1020", "addr5");
|
|
makeText(800+250, 480, "0x1028", "addr6");
|
|
|
|
var rect1 = new Konva.Rect({
|
|
x: 20,
|
|
y: 60,
|
|
id:"prec1",
|
|
stroke: '#555',
|
|
strokeWidth: 5,
|
|
fill: '#ddd',
|
|
width: 400,
|
|
height: 220,
|
|
shadowColor: 'black',
|
|
shadowBlur: 10,
|
|
shadowOffsetX: 10,
|
|
shadowOffsetY: 10,
|
|
shadowOpacity: 0.2,
|
|
cornerRadius: 10,
|
|
});
|
|
|
|
var rect2 = new Konva.Rect({
|
|
x: 20,
|
|
y: 370,
|
|
id:"console",
|
|
stroke: '#555',
|
|
strokeWidth: 5,
|
|
fill: '#ddd',
|
|
width: 400,
|
|
height: 220,
|
|
shadowColor: 'black',
|
|
shadowBlur: 10,
|
|
shadowOffsetX: 10,
|
|
shadowOffsetY: 10,
|
|
shadowOpacity: 0.2,
|
|
cornerRadius: 10,
|
|
});
|
|
|
|
var memoryText = new Konva.Text({
|
|
x: 830,
|
|
y: 635,
|
|
id:"memory",
|
|
text: "Memory",
|
|
fontSize: 28,
|
|
fontFamily: 'Calibri',
|
|
fill: '#000000',
|
|
});
|
|
|
|
var codeLabel = new Konva.Text({
|
|
x: 150,
|
|
y: 305,
|
|
id:"code",
|
|
text: "Code",
|
|
fontSize: 28,
|
|
fontFamily: 'Calibri',
|
|
fill: '#000000',
|
|
});
|
|
|
|
var consoleLabel = new Konva.Text({
|
|
x: 130,
|
|
y: 635,
|
|
id:"console",
|
|
text: "Console",
|
|
fontSize: 28,
|
|
fontFamily: 'Calibri',
|
|
fill: '#000000',
|
|
});
|
|
|
|
var consoleText = new Konva.Text({
|
|
x: 60,
|
|
y: 400,
|
|
id:"console_text",
|
|
text: "",
|
|
fontSize: 28,
|
|
fontFamily: 'Calibri',
|
|
fill: '#581845',
|
|
});
|
|
|
|
var arrowLeft1 = new Konva.Arrow({
|
|
points: [945, 350, 1100, 200, 1005, 150],
|
|
tension: 0.5,
|
|
pointerLength: 10,
|
|
pointerWidth: 10,
|
|
id: "arrowrleft1",
|
|
fill: 'green',
|
|
stroke: 'green',
|
|
strokeWidth: 5,
|
|
});
|
|
|
|
var arrowLeft2 = new Konva.Arrow({
|
|
points: [945, 450, 1100, 300, 1005, 250],
|
|
tension: 0.5,
|
|
pointerLength: 10,
|
|
pointerWidth: 10,
|
|
id: "arrowleft2",
|
|
fill: 'yellow',
|
|
stroke: 'yellow',
|
|
strokeWidth: 5,
|
|
});
|
|
|
|
var arrowLeft3 = new Konva.Arrow({
|
|
points: [945, 550, 1100, 400, 1005, 250],
|
|
tension: 0.5,
|
|
pointerLength: 10,
|
|
pointerWidth: 10,
|
|
id: "arrowleft2",
|
|
fill: 'red',
|
|
stroke: 'red',
|
|
strokeWidth: 5,
|
|
});
|
|
|
|
/* for the arrow */
|
|
var arrowarray1 = [945, 450, 1100, 300, 1005, 250];
|
|
|
|
function moveArrow(){
|
|
arrowarray1[5] = arrowarray1[5] - 100;
|
|
arrowarray1[3] = arrowarray1[3] - 100;
|
|
stage.find('#arrowleft2').points(arrowarray1);
|
|
}
|
|
|
|
// box for code
|
|
layer.add(rect1);
|
|
// box for console
|
|
layer.add(rect2);
|
|
|
|
layer.add(memoryText);
|
|
layer.add(consoleLabel);
|
|
layer.add(codeLabel);
|
|
layer.add(consoleText);
|
|
|
|
function makeCode(x,y,str,id) {
|
|
return new Konva.Text({
|
|
x: x,
|
|
y: y,
|
|
text: str,
|
|
id: 'line'+id,
|
|
fontSize: 18,
|
|
fontFamily: 'Calibri',
|
|
fill: '#000000',
|
|
width: 400,
|
|
padding: 20,
|
|
});
|
|
}
|
|
|
|
// hard code here, we assume we only have 9 lines of code.
|
|
function makeBold(id){
|
|
for(let i=1;i<=9;i++){
|
|
if(i!=id){
|
|
stage.find('#line'+i).fontStyle('normal');
|
|
}else{
|
|
stage.find('#line'+id).fontStyle('bold');
|
|
}
|
|
}
|
|
}
|
|
|
|
var code=["1. int x = 10, y = 15;",
|
|
"2. int *a = &x;",
|
|
"3. cout << x << \" \" << y << endl;",
|
|
"4. int *b = &y;",
|
|
"5. *a = x * *b;",
|
|
"6. cout << x << \" \" << y << endl;",
|
|
"7. int *c = b;",
|
|
"8. *c = 25;",
|
|
"9. cout << x << \" \" << y << endl;",
|
|
];
|
|
|
|
|
|
for (let i=0;i<code.length;i++){
|
|
// the array starts from index 0, but we want ids to be counted from index 1.
|
|
let t=makeCode(20,60+(i*20),code[i],i+1);
|
|
layer.add(t);
|
|
}
|
|
|
|
// defining the message box
|
|
var msg_box = new Konva.Rect({
|
|
x: 900,
|
|
y: 100,
|
|
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,
|
|
});
|
|
|
|
// layer.add(msg_box);
|
|
|
|
var message=["$",
|
|
"",
|
|
"",
|
|
""];
|
|
|
|
function updateMessage(msg,i) {
|
|
stage.find('#text_msg'+i).text(msg);
|
|
}
|
|
|
|
// draw that $ sign, which is a command line prompt.
|
|
makeText(60,400,message[0],'msg0');
|
|
|
|
// add the layer to the stage
|
|
stage.add(layer);
|
|
|
|
// draw the image
|
|
layer.draw();
|
|
|
|
var pc=1;
|
|
function nextstep() {
|
|
if(pc == 1){
|
|
makeBold(pc);
|
|
makeText(650,120,"int x",'x');
|
|
// this has to be after makeMemory so that the memory doesn't overwrite this.
|
|
makeContent(870,120,"10",'x_value');
|
|
makeText(650,220,"int y",'y');
|
|
makeContent(870,220,"15",'y_value');
|
|
layer.draw();
|
|
pc=pc+1;
|
|
}else if(pc == 2){
|
|
makeBold(pc);
|
|
makeText(650,320,"int *a",'a');
|
|
makeContent(870,320,"0x1008",'a_value');
|
|
// add the arrow here.
|
|
layer.add(arrowLeft1);
|
|
layer.draw();
|
|
pc=pc+1;
|
|
}else if(pc == 3){
|
|
makeBold(pc);
|
|
updateMessage("$ 10 15",0);
|
|
makeText(60,420,message[1],'msg1');
|
|
updateMessage("$ ",1);
|
|
makeText(60,440,message[2],'msg2');
|
|
makeText(60,460,message[3],'msg3');
|
|
// stage.find('#console_text').text('$ 10 15');
|
|
layer.draw();
|
|
pc=pc+1;
|
|
}else if(pc == 4){
|
|
makeBold(pc);
|
|
makeText(650,420,"int *b",'b');
|
|
makeContent(870,420,"0x1010",'b_value');
|
|
// add the second arrow here.
|
|
layer.add(arrowLeft2);
|
|
layer.draw();
|
|
pc=pc+1;
|
|
}else if(pc == 5){
|
|
makeBold(pc);
|
|
// following pointer a to the address which is pointed to by a, and store 150 to that address.
|
|
// why 150? because it's x * *b, and *b is y, which is 15, whereas x is 10, and 10*15=150.
|
|
stage.find('#x_value').text('150');
|
|
layer.draw();
|
|
pc=pc+1;
|
|
}else if(pc == 6){
|
|
makeBold(pc);
|
|
updateMessage("$ 150 15",1);
|
|
updateMessage("$ ",2);
|
|
// stage.find('#console_text').text('$ 150 15');
|
|
layer.draw();
|
|
pc=pc+1;
|
|
}else if(pc == 7){
|
|
makeBold(pc);
|
|
makeText(650,520,"int *c",'c');
|
|
makeContent(870,520,"0x1010",'c_value');
|
|
// add the 3rd arrow here.
|
|
layer.add(arrowLeft3);
|
|
layer.draw();
|
|
pc=pc+1;
|
|
}else if(pc == 8){
|
|
makeBold(pc);
|
|
// following pointer c to the address which is pointed to by c, and store 25 to that address.
|
|
// and because we assigned b to c, so b and c are now both pointing to the address 0x16, which stores the variable y.
|
|
stage.find('#y_value').text('25');
|
|
layer.draw();
|
|
pc=pc+1;
|
|
}else if(pc == 9){
|
|
makeBold(pc);
|
|
updateMessage("$ 150 25",2);
|
|
updateMessage("$ ",3);
|
|
// stage.find('#console_text').text('$ 150 25');
|
|
layer.draw();
|
|
pc=pc+1;
|
|
}else if(pc == 10){
|
|
alert("End of animation! Refresh the page if you want to re-run the animation.");
|
|
pc=pc+1;
|
|
}
|
|
}
|
|
|
|
/* vim: set ts=4: */
|