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snaptut-loadselect-move3.html
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<!DOCTYPE html>
<html>
<head>
<title>Snap.svg Tutorial</title>
</head>
<body>
<link href="/snapstyle.css" rel="stylesheet">
<div id="container"></div>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.1/jquery.min.js"></script>
<script src="snap.svg.js"></script>
<a href="http://snapsvg.io/docs/">Snap Docs</a> <a href="/">More SVG Dabbles</a>
<article>
<h1 class="heading">Loading, dragging, transforming SVG and matrix</h1>
<div class="intro">Lets load an SVG shape and drag bits of it and parent groups about.<br/>
This uses the Snap Matrix methods when dragging, as we don't know what transformation it may have.</div>
<pre class="codestuff"><code contenteditable="true">
var s = Snap("#svgout");
var highlightRect, highlightDragRect, lastSelectedEl, firstSelectedEl, activeSet, highlightedBBSet, activeEl, clickHandler, dragging = false, dragCreateMode = false, firstMouseDownPoint;
var dragStart = function ( x,y,ev ) {
if( !dragCreateMode ) {
this.data('origTransform', this.transform().local );
this.data("startingTransform", this.transform().local); /////
}
}
var move = function( ev,x,y ) {
if( dragging ) {
dragMove(ev,x,y);
}
}
var dragMove = function(dx, dy, ev, x, y) {
if( !dragCreateMode ) {
if( !this.node ) { return; }
var tdx, tdy;
var snapInvMatrix = this.transform().diffMatrix.invert() || new Snap.Matrix;
snapInvMatrix.e = snapInvMatrix.f = 0;
tdx = snapInvMatrix.x( dx,dy ); tdy = snapInvMatrix.y( dx,dy );
this.transform( this.data('origTransform') + (this.data('origTransform') ? "T" : "t") + [ tdx, tdy ] );
if( highlightRect ) { highlightRect.transform( this.transform().global.toString() ) };
} else {
dragCreateMove(dx,dy,ev,x,y);
}
}
var dragEnd = function() {
if( !dragCreateMode ) {
this.data("finishingTransform", this.transform().local);
this.transform( this.data("startingTransform") ); ////
animateEl( this );
}
}
var animateEl = function( el ) { //add check to not animate an already animating element
el.animate({ transform: el.data("finishingTransform") }, 2000, mina.bounce, function() { el.animate({ transform: el.data("startingTransform") }, 2000) });
}
document.onkeypress = function (e) {
e = e || window.event;
if( e.keyCode == "110" ) {
if( lastSelectedEl.parent().type != 'svg' ) {
highlightEl( lastSelectedEl.parent() );
} else {
highlightEl( firstSelectedEl );
}
} else if( e.keyCode == "97" ) {
dragCreateMode = true;
console.log('dragcreate mode on');
} else if( e.keyCode == "98" ) {
dragCreateMode = false;
console.log( 'dragcreate mode off');
} else if( e.keyCode == "99" ) {
highlightBBs();
} else if( e.keyCode == "100" ) {
highlightedBBsRemove();
}
};
function rectObjFromBB ( bb ) {
return { x: bb.x, y: bb.y, width: bb.width, height: bb.height }
}
function drawHighlightEl( el ) {
var r = s.rect( rectObjFromBB( el.getBBox(1) ) ).attr({ fill: "none", stroke: "silver", strokeDasharray: "5,5" });
r.transform( el.transform().global.toString() );
return r;
}
function highlightEl( el ) {
if( lastSelectedEl ) { lastSelectedEl.undrag(); }
if( highlightRect ) { highlightRect.remove(); }
highlightRect = s.rect( rectObjFromBB( el.getBBox(1) ) )
.attr({ fill: "none", stroke: "red", strokeDasharray: "5,5" });
highlightRect.transform( el.transform().global.toString() );
lastSelectedEl = el;
el.drag( dragMove, dragStart, dragEnd);
}
function highlightBBs() {
highlightedBBSet.remove();
highlightedBBSet = Snap.set();
s.selectAll("*").forEach( function( el ) {
if( typeof( el.node.getBBox ) === "function" ) {
highlightedBBSet.push( drawHighlightEl( el ) );
}
} );
}
function highlightedBBsRemove() {
highlightedBBSet.remove();
}
function getEventElement( ev ) {
if( ev.target.localName == 'svg' ) { return; };
var snapEl = Snap(ev.target);
firstSelectedEl = snapEl;
highlightEl( snapEl );
}
function removeClickHandlerFromSVG() {
s.unclick();
}
function dragCreateDown( ev,b,c,d,e ) {
dragging = true;
if( dragCreateMode ) {
// ev.preventDefault();
console.log( ev.target );
if( highlightDragRect ) { highlightDragRect.remove(); }
var pt = getTransformedPoint( ev );
firstMouseDownPoint = pt;
highlightDragRect = s.rect(pt.x, pt.y, 0, 0 ).attr({ stroke: 'blue', fill: 'none', strokeWidth: 2, strokeDasharray: "5,5" });
}
}
function getTransformedPoint( ev ) {
var ptx;
var owner = ev.target.ownerSVGElement || s.node;
ptx = owner.createSVGPoint();
ptx.x = ev.clientX;
ptx.y = ev.clientY;
ptx = ptx.matrixTransform(owner.getScreenCTM().inverse());
return ptx;
}
function getTransformedElPoint( el, x, y ) {
var pt = {};
var myMatrix = el.transform().globalMatrix;
pt.x = myMatrix.x( x,y ); pt.y = myMatrix.y( x,y );
return pt;
}
function dragCreateMove( ev,b,c,d,e ) {
if( dragCreateMode ) {
ev.preventDefault();
var pt = getTransformedPoint( ev );
if( highlightDragRect ) {
highlightDragRect.attr({ width: Math.abs( pt.x - firstMouseDownPoint.x ), height: Math.abs( pt.y - firstMouseDownPoint.y) });
}
}
}
function dragCreateUp (ev,b,c ) {
dragging = false;
if( dragCreateMode ) {
var pt = getTransformedPoint( ev );
var set = s.selectAll("*");
var insideSet = Snap.set();
set.forEach( function( el ) {
if( typeof( el.node.getBBox ) === "function" ) {
var myBB = el.getBBox(1);
var pt = getTransformedElPoint( el, myBB.x, myBB.y );
var pt2 = getTransformedElPoint( el, myBB.x2, myBB.y2 );
if( Snap.path.isPointInsideBBox( highlightDragRect.getBBox(1), pt.x, pt.y ) && ( Snap.path.isPointInsideBBox( highlightDragRect.getBBox(1), pt2.x, pt2.y ) ) ) {
insideSet.push(el);
}
}
} );
if( highlightDragRect ) { highlightDragRect.remove(); }
// insideSet.forEach( function( el ){ el.transform( el.transform() + "t20,20" ) } );
// insideSet.forEach( function( el ){ el.animate({ transform: "t120,10" }, 2000) } );
insideSet.forEach( function( el ){ testTrans( el ); } );
}
}
function testTrans( el ) {
console.log( el.transform() );
}
function addHandlerToSVG() {
s.click( function( ev ) { getEventElement( ev ) } )
s.mousedown( dragCreateDown );
s.mousemove( move );
s.mouseup( dragCreateUp );
}
highlightedBBSet = Snap.set();
var tux = Snap.load("Bird.svg", function ( loadedFragment ) {
s.append( loadedFragment );
addHandlerToSVG();
s.text(250,100,"Click to select part of image (like foot), N-key will rotate through parent group and drag");
s.text(250,120,"Key C highlight BBoxs to select, D to remove highlighting");
s.text(250,140,"Key A Go into Drag Select mode");
} );
</code>
<button class="run">Edit/Run</button>
</pre>
</article>
<div class="intro">SVGout area...</div>
<div class="output">
<svg id="svgout" width="400" height="400"></svg>
</div>
<div class="intro">The actual svg markup looks like this (when you've clicked on run)....</div>
<div id="htmlraw"></div>
<script src="snaptut.js"></script></script>
<script src="hijs.js"></script>
</body>