107 lines
3.3 KiB
JavaScript
107 lines
3.3 KiB
JavaScript
/*
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pMap - a JavaScript to add image map support to pChart graphs!
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Copyright (C) 2008 Jean-Damien POGOLOTTI
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Version 1.1 last updated on 08/20/08
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http://pchart.sourceforge.net
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 1,2,3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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var pMap_IE = document.all?true:false;
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var pMap_ImageMap = new Array();
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var pMap_ImageID = "";
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var pMap_MouseX = 0;
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var pMap_MouseY = 0;
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var pMap_CurrentKey = -1;
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var pMap_URL = "";
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var pMap_Tries = 0;
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var pMap_MaxTries = 5;
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var pMap_HTTP_Timeout = 1000;
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var pMap_MUTEX = false;
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var pMap_MUTEX_Timeout = 100;
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if (!pMap_IE) { document.captureEvents(Event.MOUSEMOVE); }
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function getMousePosition(e)
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{
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/* Protect against event storm */
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if (pMap_MUTEX) { return(0);}
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pMap_MUTEX = true;
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setTimeout("pMap_MUTEX=false",pMap_MUTEX_Timeout);
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/* Determine mouse position over the chart */
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if (pMap_IE)
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{ pMap_MouseX = event.clientX + document.body.scrollLeft; pMap_MouseY = event.clientY + document.body.scrollTop; }
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else
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{ pMap_MouseX = e.pageX; pMap_MouseY = e.pageY; }
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pMap_MouseX -= document.getElementById(pMap_ImageID).offsetLeft;
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pMap_MouseY -= document.getElementById(pMap_ImageID).offsetTop;
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/* Check if we are flying over a map zone
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* Lets use the following method to check if a given
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* point is in any convex polygon.
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* http://www.programmingforums.org/post168124-3.html
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*/
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Found = false;
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for (Key in pMap_ImageMap)
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{
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Values = Key.split("--");
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SeriesName = Values[0];
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SeriesValue = Values[1];
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SignSum = 0;
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for (i = 0; i <= pMap_ImageMap[Key].length - 1; i++)
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{
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if (i == pMap_ImageMap[Key].length - 1)
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{
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index1 = i;
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index2 = 0;
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}
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else
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{
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index1 = i;
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index2 = i+1;
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}
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result = getDeterminant(
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pMap_ImageMap[Key][index1][0],
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pMap_ImageMap[Key][index1][1],
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pMap_ImageMap[Key][index2][0],
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pMap_ImageMap[Key][index2][1],
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pMap_MouseX,
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pMap_MouseY
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);
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if (result > 0) { SignSum += 1; } else { SignSum += -1; }
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}
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//console.log(Key+": "+SignSum);
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if (Math.abs(SignSum) == pMap_ImageMap[Key].length)
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{
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Found = true;
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if ( pMap_CurrentKey != Key )
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{ overlib(SeriesValue, CAPTION, SeriesName, WIDTH, 80); pMap_CurrentKey = Key; }
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}
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}
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if ( !Found && pMap_CurrentKey != -1 ) { nd(); pMap_CurrentKey = -1; }
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}
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function getDeterminant(X1, Y1, X2, Y2, X3, Y3)
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{
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return (X2*Y3 - X3*Y2) - (X1*Y3 - X3*Y1) + (X1*Y2 - X2*Y1);
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}
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function LoadImageMap(ID, map)
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{
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pMap_ImageID = ID;
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pMap_ImageMap = JSON.parse(map);
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}
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