📄 javascript.txt
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE>paint</TITLE>
<style>
.emuW{position:absolute;font-size:2px;width:2;background-color:red}
.emuH{position:absolute;font-size:2px;height:2;background-color:red}
.emuWH{position:absolute;font-size:2px;width:2;height:2;background-color:red}
</style>
<SCRIPT LANGUAGE="JavaScript" defer>
<!--
var blnStartFlag;
blnStartFlag = false;
var intCount;
var intMouseMoveCount;
intCount = 1;
intMouseMoveCount = 1;
function fnSwitchMode(){
if(blnStartFlag == false && window.event.srcElement.type != "button"){
blnStartFlag = true;
}
else{
blnStartFlag = false;
oldX=oldY=0;
}
}
function fnPaint(){
if(blnStartFlag == true){
intCount = intCount + 1;
var stElm = drawLine(oldX==0?event.x:oldX,oldY==0?event.y:oldY,event.x,event.y,"red");
oldX = event.x;oldY = event.y;draw(stElm);
}
intMouseMoveCount = intMouseMoveCount + 1;
div1.innerHTML = "MouseMoveCount:" + intMouseMoveCount
+ "<br> PaintCount:" + intCount
+ "<br>LeftPos:" + window.event.x
+ "<br> TopPos:" + window.event.y;
}
function draw(html){
if (emu == null || emu.children.length>maxChildren){
emu = document.createElement("<div>");
setTimeout("document.body.insertBefore(emu)",50);
}
setTimeout("emu.innerHTML+=\""+html+"\"",1)
}
function fnShowCount(){
alert(intCount);
}
//-->
</SCRIPT>
<SCRIPT LANGUAGE="JavaScript">
<!--
var emu = null;
var maxChildren = 50;
var oldX = 0;
var oldY = 0;
function drawLine(x0,y0,x1,y1,color){
x0 = Math.round(x0);
x1 = Math.round(x1);
y0 = Math.round(y0);
y1 = Math.round(y1);
var rs = "";
if (y0 == y1){ //画横?
if (x0>x1){var t=x0;x0=x1;x1=t}
rs = "<p class=emuH style='top:"+y0+";left:"+x0+";background-color:"+color+"; width:"+Math.abs(x1-x0)+"'/>";
}
else if (x0 == x1){ //画??
if (y0>y1){var t=y0;y0=y1;y1=t}
rs = "<p class=emuW style='top:"+y0+";left:"+x0+";background-color:"+color+";height:"+Math.abs(y1-y0)+"'/>";
}
else{
var lx = x1-x0;
var ly = y1-y0;
if (Math.abs(lx)>Math.abs(ly)){
if (ly<0){
var t=x0;x0=x1;x1=t;
t=y0;y0=y1;y1=t;
lx = -lx;
ly = -ly;
}
var dx = lx/ly;
rs = new Array(ly);
for (var i=0;i<ly;i++){
var left,width;
if (dx>0){
left = Math.round(i*dx);
width = Math.round((i+1)*dx)-left;
left += x0;
if (width+left>x1) width = x1-left;
}else{
left = Math.round((i+1)*dx);
width = Math.round((i)*dx)-left;
left += x0;
if (left<x1) {
width = width+left-x1;
left=x1;
}
}
rs[i] = "<p class=emuH style='top:"+(y0+i)+";left:"+left+";width:"+width+";background-color:"+color+"'/>";
}
}else{
if (lx<0){
var t=x0;x0=x1;x1=t;
t=y0;y0=y1;y1=t;
lx = -lx;
ly = -ly;
}
var dy = ly/lx;
rs = new Array(lx);
for (var i=0;i<lx;i++){
var top,height;
if (dy>0){
top = Math.round(i*dy);
height = Math.round((i+1)*dy)-top;
top += y0;
if (height+top>y1) height = y1-top;
}else{
top = Math.round((i+1)*dy);
height = Math.round((i)*dy)-top;
top += y0;
if (top<y1) {
height = height+top-y1;
top=y1;
}
}
rs[i] = "<p class=emuW style='top:"+top+";left:"+(x0+i)+";height:"+height+";background-color:"+color+"'/>";
}
}
rs = rs.join("");
}
return rs
}
//-->
</SCRIPT>
</HEAD>
<BODY onclick="fnSwitchMode()" onmousemove="fnPaint()">
<input type="button" onclick="fnShowCount()" value="ShowCount">
<div id="div1"></div>
</BODY>
</HTML>
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