sch_test/mxclient/js/shape/mxMarker.js

209 lines
5.3 KiB
JavaScript

/**
* Copyright (c) 2006-2015, JGraph Ltd
* Copyright (c) 2006-2015, Gaudenz Alder
*/
var mxMarker =
{
/**
* Class: mxMarker
*
* A static class that implements all markers for VML and SVG using a
* registry. NOTE: The signatures in this class will change.
*
* Variable: markers
*
* Maps from markers names to functions to paint the markers.
*/
markers: [],
/**
* Function: addMarker
*
* Adds a factory method that updates a given endpoint and returns a
* function to paint the marker onto the given canvas.
*/
addMarker: function(type, funct)
{
mxMarker.markers[type] = funct;
},
/**
* Function: createMarker
*
* Returns a function to paint the given marker.
*/
createMarker: function(canvas, shape, type, pe, unitX, unitY, size, source, sw, filled)
{
var funct = mxMarker.markers[type];
return (funct != null) ? funct(canvas, shape, type, pe, unitX, unitY, size, source, sw, filled) : null;
}
};
/**
* Adds the classic and block marker factory method.
*/
(function()
{
function createArrow(widthFactor)
{
widthFactor = (widthFactor != null) ? widthFactor : 2;
return function(canvas, shape, type, pe, unitX, unitY, size, source, sw, filled)
{
// The angle of the forward facing arrow sides against the x axis is
// 26.565 degrees, 1/sin(26.565) = 2.236 / 2 = 1.118 ( / 2 allows for
// only half the strokewidth is processed ).
var endOffsetX = unitX * sw * 1.118;
var endOffsetY = unitY * sw * 1.118;
unitX = unitX * (size + sw);
unitY = unitY * (size + sw);
var pt = pe.clone();
pt.x -= endOffsetX;
pt.y -= endOffsetY;
var f = (type != mxConstants.ARROW_CLASSIC && type != mxConstants.ARROW_CLASSIC_THIN) ? 1 : 3 / 4;
pe.x += -unitX * f - endOffsetX;
pe.y += -unitY * f - endOffsetY;
return function()
{
canvas.begin();
canvas.moveTo(pt.x, pt.y);
canvas.lineTo(pt.x - unitX - unitY / widthFactor, pt.y - unitY + unitX / widthFactor);
if (type == mxConstants.ARROW_CLASSIC || type == mxConstants.ARROW_CLASSIC_THIN)
{
canvas.lineTo(pt.x - unitX * 3 / 4, pt.y - unitY * 3 / 4);
}
canvas.lineTo(pt.x + unitY / widthFactor - unitX, pt.y - unitY - unitX / widthFactor);
canvas.close();
if (filled)
{
canvas.fillAndStroke();
}
else
{
canvas.stroke();
}
};
}
};
mxMarker.addMarker('classic', createArrow(2));
mxMarker.addMarker('classicThin', createArrow(3));
mxMarker.addMarker('block', createArrow(2));
mxMarker.addMarker('blockThin', createArrow(3));
function createOpenArrow(widthFactor)
{
widthFactor = (widthFactor != null) ? widthFactor : 2;
return function(canvas, shape, type, pe, unitX, unitY, size, source, sw, filled)
{
// The angle of the forward facing arrow sides against the x axis is
// 26.565 degrees, 1/sin(26.565) = 2.236 / 2 = 1.118 ( / 2 allows for
// only half the strokewidth is processed ).
var endOffsetX = unitX * sw * 1.118;
var endOffsetY = unitY * sw * 1.118;
unitX = unitX * (size + sw);
unitY = unitY * (size + sw);
var pt = pe.clone();
pt.x -= endOffsetX;
pt.y -= endOffsetY;
pe.x += -endOffsetX * 2;
pe.y += -endOffsetY * 2;
return function()
{
canvas.begin();
canvas.moveTo(pt.x - unitX - unitY / widthFactor, pt.y - unitY + unitX / widthFactor);
canvas.lineTo(pt.x, pt.y);
canvas.lineTo(pt.x + unitY / widthFactor - unitX, pt.y - unitY - unitX / widthFactor);
canvas.stroke();
};
}
};
mxMarker.addMarker('open', createOpenArrow(2));
mxMarker.addMarker('openThin', createOpenArrow(3));
mxMarker.addMarker('oval', function(canvas, shape, type, pe, unitX, unitY, size, source, sw, filled)
{
var a = size / 2;
var pt = pe.clone();
pe.x -= unitX * a;
pe.y -= unitY * a;
return function()
{
canvas.ellipse(pt.x - a, pt.y - a, size, size);
if (filled)
{
canvas.fillAndStroke();
}
else
{
canvas.stroke();
}
};
});
function diamond(canvas, shape, type, pe, unitX, unitY, size, source, sw, filled)
{
// The angle of the forward facing arrow sides against the x axis is
// 45 degrees, 1/sin(45) = 1.4142 / 2 = 0.7071 ( / 2 allows for
// only half the strokewidth is processed ). Or 0.9862 for thin diamond.
// Note these values and the tk variable below are dependent, update
// both together (saves trig hard coding it).
var swFactor = (type == mxConstants.ARROW_DIAMOND) ? 0.7071 : 0.9862;
var endOffsetX = unitX * sw * swFactor;
var endOffsetY = unitY * sw * swFactor;
unitX = unitX * (size + sw);
unitY = unitY * (size + sw);
var pt = pe.clone();
pt.x -= endOffsetX;
pt.y -= endOffsetY;
pe.x += -unitX - endOffsetX;
pe.y += -unitY - endOffsetY;
// thickness factor for diamond
var tk = ((type == mxConstants.ARROW_DIAMOND) ? 2 : 3.4);
return function()
{
canvas.begin();
canvas.moveTo(pt.x, pt.y);
canvas.lineTo(pt.x - unitX / 2 - unitY / tk, pt.y + unitX / tk - unitY / 2);
canvas.lineTo(pt.x - unitX, pt.y - unitY);
canvas.lineTo(pt.x - unitX / 2 + unitY / tk, pt.y - unitY / 2 - unitX / tk);
canvas.close();
if (filled)
{
canvas.fillAndStroke();
}
else
{
canvas.stroke();
}
};
};
mxMarker.addMarker('diamond', diamond);
mxMarker.addMarker('diamondThin', diamond);
})();