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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
function screenCTM(elem) {
if (elem.getScreenCTM)
return elem.getScreenCTM();
// This is to handle ASV 3.0, this depends on
// a number of bugs in the ASV implementation.
if (elem.currentScale) {
var scale = root.currentScale;
var trans = root.currentTranslate;
var ret = root.createSVGMatrix();
ret.scale(scale);
ret.translate(trans.x, trans.y);
return ret;
}
var pMat = screenCTM(elem.parentNode);
var eMat = elem.getCTM();
if (eMat == null) return pMat;
eMat = eMat.multiply(pMat);
return eMat;
}
function transformToElement(from, to) {
if (!from.getTransformToElement)
return from.getTransformToElement(to);
var m1 = screenCTM(from);
var m2 = screenCTM(to);
return m1.multiply(m2.inverse());
}
// Transform screen x/y to elem's coordinate system.
// returns an SVGPoint object.
function localPt(elem, x, y) {
var mat = screenCTM(elem);
var imat = mat.inverse();
var cPt = document.getRootElement().createSVGPoint();
cPt.x = x;
cPt.y = y;
cPt = cPt.matrixTransform(imat);
return cPt;
}
function ForwardMouseDown(obj) {
this.obj = obj;
this.handleEvent = function(evt) {
obj.mousedown(evt);
}
}
function ForwardMouseMove(obj) {
this.obj = obj;
this.handleEvent = function(evt) {
obj.mousemove(evt);
}
}
function ForwardMouseUp(obj) {
this.obj = obj;
this.handleEvent = function(evt) {
obj.mouseup(evt);
}
}
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