/* Copyright (C) 2004 itgroup MPIWG
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
Authors: ROC 23.11.2004
!! requires hl_lib.js !!
*/
var elemCoords;
var elemRed;
function mapadd_init() {
map_init();
// form element for coordinates
elemCoords = getElement("coordstr");
// new red area
elemRed = getElement("newarea");
selectArea();
}
function selectArea() {
var click = 1;
var pt1, pt2;
var redrect;
window.focus();
function areaClick(evt) {
// mouse click handler
if (click == 1) {
// first click -- start moving
click = 2;
pt1 = evtPosition(evt);
pt2 = pt1;
redrect = new Rectangle(pt1.x, pt1.y, 10, 10);
moveElement(elemRed, redrect);
// show element
if (elemRed.style) {
elemRed.style.background = "url(area_img)";
} else if (elemRed.layers) {
elemRed.background.src = "area_img";
}
showElement(elemRed, true);
// show moving
registerEvent("mousemove", elemScaler, areaMove);
registerEvent("mousemove", elemRed, areaMove);
} else {
// second click -- end moving
pt2 = evtPosition(evt);
unregisterEvent("mousemove", elemScaler, areaMove);
unregisterEvent("mousemove", elemRed, areaMove);
var p1 = dlTrafo.invtransform(pt1);
var p2 = dlTrafo.invtransform(pt2);
var ww = p2.x - p1.x;
var wh = p2.y - p1.y;
if ((ww > 0)&&(wh > 0)) {
var coords = cropFloat(p1.x)+","+cropFloat(p1.y)+","+cropFloat(ww)+","+cropFloat(wh);
// fill coords into form
elemCoords.value = coords;
}
// start again
click = 1;
}
}
function areaMove(evt) {
// mouse move handler
pt2 = evtPosition(evt);
// restrict marks to move right and down
var w = pt2.x - pt1.x;
var h = pt2.y - pt1.y;
redrect.width = (w > 0) ? w : 1;
redrect.height = (h > 0) ? h : 1;
moveElement(elemRed, redrect);
}
// starting event capture
registerEvent("mousedown", elemScaler, areaClick);
registerEvent("mousedown", elemRed, areaClick);
}
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