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Annotation of ECHO_content/js/hl_lib.js, revision 1.1.1.1

1.1       casties     1: /* Copyright (C) 2004 itgroup MPIWG
                      2:  
                      3: This program is free software; you can redistribute it and/or
                      4: modify it under the terms of the GNU General Public License
                      5: as published by the Free Software Foundation; either version 2
                      6: of the License, or (at your option) any later version.
                      7:  
                      8: This program is distributed in the hope that it will be useful,
                      9: but WITHOUT ANY WARRANTY; without even the implied warranty of
                     10: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     11: GNU General Public License for more details.
                     12:  
                     13: You should have received a copy of the GNU General Public License
                     14: along with this program; if not, write to the Free Software
                     15: Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
                     16:  
                     17: Authors: ROC 6.5.2004
                     18: */
                     19: 
                     20: var hlAreas = new Object();
                     21: var hlTrafos = new Object();
                     22: 
                     23: // Area class
                     24: function Area(id, target_id, a_x, a_y, a_w, a_h, type) {
                     25:     this.id = id;
                     26:     this.target_id = target_id;
                     27:     this.rect = new Rectangle(a_x, a_y, a_w, a_h);
                     28:     this.type = type;
                     29:     this.pxarea = 0;
                     30:     return this;
                     31: }
                     32: 
                     33: function addArea(id, target_id, a_x, a_y, a_w, a_h, type) {
                     34:     hlAreas[id] = new Area(id, target_id, a_x, a_y, a_w, a_h, type);
                     35: }
                     36: 
                     37: function parseTrafo(target_id) {
                     38:     // returns Transform for given target picsize
                     39:     var picsize = getElementSize(target_id);
                     40:     var trafo = new Transform();
                     41:     // subtract area offset and size
                     42:     //trafo.concat(getTranslation(new Position(-dlArea.x, -dlArea.y)));
                     43:     //trafo.concat(getScale(new Size(1/dlArea.width, 1/dlArea.height)));
                     44:     // scale to screen size
                     45:     trafo.concat(getScale(picsize));
                     46:     trafo.concat(getTranslation(picsize));
                     47:     return trafo;
                     48: }
                     49: 
                     50: function placeAreas() {
                     51:     // positions all area-images
                     52:     var maxsize = 0;
                     53:     for (var a in hlAreas) {
                     54:    var area = hlAreas[a];
                     55:    var trafo = hlTrafos[area.target_id];
                     56:    if (trafo) {
                     57:        var rect = trafo.transform(area.rect);
                     58:        area.pxarea = rect.getArea();
                     59:        maxsize = Math.max(maxsize, area.pxarea);
                     60:        if (area.type == "area") {
                     61:        moveElement("i."+area.id, rect);
                     62:        } else {
                     63:        moveElement("i."+area.id, rect.getPosition());
                     64:        }
                     65:    }
                     66:     }
                     67:     // add z-index (largest value for smallest area)
                     68:     for (a in hlAreas) {
                     69:    area = hlAreas[a];
                     70:    var elem = getElement("i."+area.id);
                     71:    if (elem.style) {
                     72:        elem.style.zIndex = Math.round(maxsize - area.pxarea);
                     73:    }
                     74:     }
                     75: }
                     76: 
                     77: function highlightPair(id, highlight) {
                     78:     // hightlights or unhighlights the link and image of id
                     79:     var area = hlAreas[id];
                     80:     var img = getElement("i."+id);
                     81:     var link = getElement("a."+id);
                     82:     if (highlight) {
                     83:    link.style.backgroundColor = "#f08080";
                     84:    if (area.type == "arrow") {
                     85:        img.style.borderStyle = "solid";
                     86:    } else if (area.type == "area") {
                     87:        img.style.background = "url(area_img)";
                     88:    }
                     89:     } else {
                     90:    link.style.backgroundColor = "";
                     91:    if (area.type == "arrow") {
                     92:        img.style.borderStyle = "none";
                     93:    } else if (area.type == "area") {
                     94:        img.style.background = "none";
                     95:    }
                     96:     }
                     97: }
                     98: 
                     99: function init() {
                    100:     hlTrafos["overview"] = parseTrafo("overview");
                    101:     placeAreas();
                    102:     return null;
                    103: }