/* ============================================================================================ JS-GIS API: JavaScript Geographic Information System browser library Copyright (C) 2001, 2002 Luca Sigfrido Percich The JS-GIS API 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: please refer to http://www.gnu.org/licenses/gpl.html The JS-GIS API 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. ============================================================================================ jsgis_cursors.js define classes fow writing map cursors Author: Luca Sigfrido Percich (luca.percich@reacoop.it) Version: 2.0 Last updated: june 05, 2002 Usage: 1. include this script in the of main page or map page; 2. Define a new TMapCursors object: var MapCursors = new TMapCursors(Map, 16, 1, '../img/', '.png') 3. call document.write(MapCursors.toString()) in the map page after Map.toString() ============================================================================================ */ function TMapCursors(aMap, aImgW, aDelta, aImgPath, aImgExt) { this.map = aMap this.imgW = (aImgW) ? aImgW : 16 delta = (aDelta) ? aDelta : 1 this.imgPath = (aImgPath) ? aImgPath : '' this.imgExt = (aImgExt) ? aImgExt : '.png' this.imgH = this.imgW var mapW = this.map.frame.rect.width - this.imgW var mapW2 = Math.floor((this.map.frame.rect.width / 2) - (this.imgW / 2)) var mapH = this.map.frame.rect.height - this.imgH var mapH2 = Math.floor((this.map.frame.rect.height / 2) - (this.imgH / 2)) this.buttons = new Array() this.toString = TMapCursors_toString this.addButton = TMapCursors_addButton this.addButton(mapW2, 0, delta, 0, 'cursor_n') this.addButton(mapW2, mapH, -delta, 0, 'cursor_s') this.addButton(0, mapH2, 0, -delta, 'cursor_w') this.addButton(mapW, mapH2, 0, delta, 'cursor_e') this.addButton(0, 0, delta, -delta, 'cursor_nw') this.addButton(mapW, 0, delta, delta, 'cursor_ne') this.addButton(mapW, mapH, -delta, delta, 'cursor_se') this.addButton(0, mapH, -delta, -delta, 'cursor_sw') } function TMapCursors_toString() { return this.buttons.join('\n') } function TMapCursors_addButton(x,y,dy,dx,src) { this.buttons[this.buttons.length] = new TMapCursorButton( this, this.map.frame.rect.min.x + x, this.map.frame.rect.min.y + y, dy, dx, src, this.imgW, this.imgW ) } function TMapCursorButton(aOwner, aX, aY, dy, dx, src, imgW) { this.inherited = TFrame this.inherited(aX, aY, imgW, imgW) this.owner = aOwner this.dx = dx this.dy = dy this.src = src this.contents = new TImage(this.owner.imgPath + this.src + this.owner.imgExt , imgW, imgW) this.contents.anchor = new TAnchor('javascript:' + this.owner.map.varName + '.panMap(' + this.dy + ',' + this.dx + ')') this.beforeDraw = TMapCursorButton_beforeDraw } function TMapCursorButton_beforeDraw() { var m = this.owner.map var rz = this.owner.map.project.zoomLevels.get(this.owner.map.zoomLevel) if ( ((this.dx > 0) && (m.llTile.x + m.tilesX - 1 >= rz.numTilesX)) || ((this.dx < 0) && (m.llTile.x <= 1)) || ((this.dy > 0) && (m.llTile.y + m.tilesY - 1 >= rz.numTilesY)) || ((this.dy < 0) && (m.llTile.y <= 1)) ) return 0 return 1 }