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Fixing KaMap layer

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This also fixes an issue that has gone unnoticed for a while: the grid did
not cover the bottom of the map viewport, but instead covered an invisible
area above the top of the map viewport.
This commit is contained in:
ahocevar
2012-10-11 23:54:04 +02:00
parent e7292ecbe2
commit 7df5e3ca8e
2 changed files with 29 additions and 9 deletions
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32
lib/OpenLayers/Layer/KaMap.js
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@@ -92,8 +92,8 @@ OpenLayers.Layer.KaMap = OpenLayers.Class(OpenLayers.Layer.Grid, {
* resolution - {Number}
*
* Returns:
* {Object} Object containing properties tilelon, tilelat, tileoffsetlat,
* tileoffsetlat, tileoffsetx, tileoffsety
* {Object} Object containing properties tilelon, tilelat, tileoffsetx,
* tileoffsety, startcol, startrow
*/
calculateGridLayout: function(bounds, origin, resolution) {
var tilelon = resolution*this.tileSize.w;
@@ -103,22 +103,42 @@ OpenLayers.Layer.KaMap = OpenLayers.Class(OpenLayers.Layer.Grid, {
var tilecol = Math.floor(offsetlon/tilelon) - this.buffer;
var tilecolremain = offsetlon/tilelon - tilecol;
var tileoffsetx = -tilecolremain * this.tileSize.w;
var tileoffsetlon = tilecol * tilelon;
var offsetlat = bounds.top;
var tilerow = Math.ceil(offsetlat/tilelat) + this.buffer;
var tilerow = Math.floor(offsetlat/tilelat) + this.buffer;
var tilerowremain = tilerow - offsetlat/tilelat;
var tileoffsety = -(tilerowremain+1) * this.tileSize.h;
var tileoffsetlat = tilerow * tilelat;
return {
tilelon: tilelon, tilelat: tilelat,
tileoffsetlon: tileoffsetlon, tileoffsetlat: tileoffsetlat,
tileoffsetx: tileoffsetx, tileoffsety: tileoffsety,
startcol: tilecol, startrow: tilerow
};
},
/**
* Method: getTileBoundsForGridIndex
*
* Parameters:
* row - {Number} The row of the grid
* col - {Number} The column of the grid
*
* Returns:
* {<OpenLayers.Bounds>} The bounds for the tile at (row, col)
*/
getTileBoundsForGridIndex: function(row, col) {
var origin = this.getTileOrigin();
var tileLayout = this.gridLayout;
var tilelon = tileLayout.tilelon;
var tilelat = tileLayout.tilelat;
var minX = (tileLayout.startcol + col) * tilelon;
var minY = (tileLayout.startrow - row) * tilelat;
return new OpenLayers.Bounds(
minX, minY,
minX + tilelon, minY + tilelat
);
},
/**
* APIMethod: clone
*