WebRuler! Régua interativa
WebRuler! Bookmarklet
Para usar basta clicar com o botão da direita no link acima e adicionar aos favoritos. Depois acesse o atalho dos favoritos em qualquer site para ativar a régua.
Se ainda usar Internet Explorer, instale Firefox ou veja uma demonstração da régua .
Baseado no KRuler para Linux, usando funções de Youngpup.
{
o.onmousedown = Drag.start;
o.hmode = bSwapHorzRef ? false : true ;
o.vmode = bSwapVertRef ? false : true ;
o.root = oRoot && oRoot != null ? oRoot : o ;
if (o.hmode && isNaN(parseInt(o.root.style.left ))) o.root.style.left = '0px';
if (o.vmode && isNaN(parseInt(o.root.style.top ))) o.root.style.top = '0px';
if (!o.hmode && isNaN(parseInt(o.root.style.right ))) o.root.style.right = '0px';
if (!o.vmode && isNaN(parseInt(o.root.style.bottom))) o.root.style.bottom = '0px';
o.minX = typeof minX != 'undefined' ? minX : null;
o.minY = typeof minY != 'undefined' ? minY : null;
o.maxX = typeof maxX != 'undefined' ? maxX : null;
o.maxY = typeof maxY != 'undefined' ? maxY : null;
o.xMapper = fXMapper ? fXMapper : null;
o.yMapper = fYMapper ? fYMapper : null;
o.root.onDragStart = new Function();
o.root.onDragEnd = new Function();
o.root.onDrag = new Function();
},
start : function(e)
{
var o = Drag.obj = this;
e = Drag.fixE(e);
var y = parseInt(o.vmode ? o.root.style.top : o.root.style.bottom);
var x = parseInt(o.hmode ? o.root.style.left : o.root.style.right );
o.root.onDragStart(x, y);
o.lastMouseX = e.clientX;
o.lastMouseY = e.clientY;
if (o.hmode) {
if (o.minX != null) o.minMouseX = e.clientX - x + o.minX;
if (o.maxX != null) o.maxMouseX = o.minMouseX + o.maxX - o.minX;
} else {
if (o.minX != null) o.maxMouseX = -o.minX + e.clientX + x;
if (o.maxX != null) o.minMouseX = -o.maxX + e.clientX + x;
}
if (o.vmode) {
if (o.minY != null) o.minMouseY = e.clientY - y + o.minY;
if (o.maxY != null) o.maxMouseY = o.minMouseY + o.maxY - o.minY;
} else {
if (o.minY != null) o.maxMouseY = -o.minY + e.clientY + y;
if (o.maxY != null) o.minMouseY = -o.maxY + e.clientY + y;
}
document.onmousemove = Drag.drag;
document.onmouseup = Drag.end;
return false;
},
drag : function(e)
{
e = Drag.fixE(e);
var o = Drag.obj;
var ey = e.clientY;
var ex = e.clientX;
var y = parseInt(o.vmode ? o.root.style.top : o.root.style.bottom);
var x = parseInt(o.hmode ? o.root.style.left : o.root.style.right );
var nx, ny;
if (o.minX != null) ex = o.hmode ? Math.max(ex, o.minMouseX) : Math.min(ex, o.maxMouseX);
if (o.maxX != null) ex = o.hmode ? Math.min(ex, o.maxMouseX) : Math.max(ex, o.minMouseX);
if (o.minY != null) ey = o.vmode ? Math.max(ey, o.minMouseY) : Math.min(ey, o.maxMouseY);
if (o.maxY != null) ey = o.vmode ? Math.min(ey, o.maxMouseY) : Math.max(ey, o.minMouseY);
nx = x + ((ex - o.lastMouseX) * (o.hmode ? 1 : -1));
ny = y + ((ey - o.lastMouseY) * (o.vmode ? 1 : -1));
if (o.xMapper) {nx = o.xMapper(y)}
else if (o.yMapper) {ny = o.yMapper(x)}
Drag.obj.root.style[o.hmode ? 'left' : 'right'] = nx + 'px';
Drag.obj.root.style[o.vmode ? 'top' : 'bottom'] = ny + 'px';
Drag.obj.lastMouseX = ex;
Drag.obj.lastMouseY = ey;
Drag.obj.root.onDrag(nx, ny);
return false;
},
end : function()
{
document.onmousemove = null;
document.onmouseup = null;
Drag.obj.root.onDragEnd( parseInt(Drag.obj.root.style[Drag.obj.hmode ? 'left' : 'right']),
parseInt(Drag.obj.root.style[Drag.obj.vmode ? 'top' : 'bottom']));
Drag.obj = null;
},
fixE : function(e)
{
if (typeof e == 'undefined') e = window.event;
if (typeof e.layerX == 'undefined') e.layerX = e.offsetX;
if (typeof e.layerY == 'undefined') e.layerY = e.offsetY;
return e;
}
};
function ruler(){
var it=document.createElement('div');
it.id='webruler';
it.style.position='absolute';
it.style.top='150px';
it.style.left='80px';
it.style.textAlign='left';
it.style.zIndex='99999';
it.style.border='1px solid #333';
it.style.cursor='move';
var v=document.createElement('img');
v.style.cursor='pointer';
it.appendChild(v);
var b=document.getElementsByTagName('body')[0];
b.appendChild(it);
horizontal();
Drag.init(it);
}
function horizontal(){
var it=document.getElementById('webruler');
it.style.width='509px';
it.style.height='60px';
it.style.backgroundImage='url(http://joaomak.net/util/webruler/ruler.png)';
it.style.backgroundPosition='bottom left';
var v=it.getElementsByTagName('img')[0];
v.setAttribute('src','http://joaomak.net/util/webruler/vertical.gif');
v.setAttribute('onclick','vertical()');
v.style.margin='6px';
}
function vertical(){
var it=document.getElementById('webruler');
it.style.width='60px';
it.style.height='340px';
it.style.backgroundImage='url(http://joaomak.net/util/webruler/rulerv.png)';
it.style.backgroundPosition='top left';
var h=it.getElementsByTagName('img')[0];
h.setAttribute('onclick','horizontal()');
h.setAttribute('src','http://joaomak.net/util/webruler/horizontal.gif');
h.style.marginLeft='47px';
}
ruler()){kind=link}