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Backbuffer needs z-index

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Since we don't rely on the DOM order for layers, we also cannot rely on it
for backbuffers. This change simply adds a sensible z-index to the
backbuffer container.
This commit is contained in:
ahocevar
2013-03-27 16:19:58 +01:00
parent 246d2d99d3
commit fe172ccf6e
2 changed files with 4 additions and 1 deletions
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lib/OpenLayers/Layer/Grid.js
+2
View File
@@ -705,6 +705,8 @@ OpenLayers.Layer.Grid = OpenLayers.Class(OpenLayers.Layer.HTTPRequest, {
backBuffer.id = this.div.id + '_bb'; backBuffer.id = this.div.id + '_bb';
backBuffer.className = 'olBackBuffer'; backBuffer.className = 'olBackBuffer';
backBuffer.style.position = 'absolute'; backBuffer.style.position = 'absolute';
backBuffer.style.zIndex = this.map.Z_INDEX_BASE.BaseLayer -
(this.map.getNumLayers() - this.map.getLayerIndex(this));
for(var i=0, lenI=this.grid.length; i<lenI; i++) { for(var i=0, lenI=this.grid.length; i<lenI; i++) {
for(var j=0, lenJ=this.grid[i].length; j<lenJ; j++) { for(var j=0, lenJ=this.grid[i].length; j<lenJ; j++) {
var tile = this.grid[i][j], var tile = this.grid[i][j],
tests/Layer/Grid.html
+2 -1
View File
@@ -1049,7 +1049,7 @@
} }
function test_createBackBuffer(t) { function test_createBackBuffer(t) {
t.plan(7); t.plan(8);
var map = new OpenLayers.Map('map'); var map = new OpenLayers.Map('map');
var layer = new OpenLayers.Layer.WMS('', '', {}, { var layer = new OpenLayers.Layer.WMS('', '', {}, {
@@ -1083,6 +1083,7 @@
layer.applyBackBuffer(1); layer.applyBackBuffer(1);
t.ok(backBuffer != undefined, t.ok(backBuffer != undefined,
'createBackBuffer returns a back buffer'); 'createBackBuffer returns a back buffer');
t.eq(layer.backBuffer.style.zIndex, '99', 'z-index of backbuffer correct.');
t.eq(backBuffer.childNodes[0].style.left, '0px', t.eq(backBuffer.childNodes[0].style.left, '0px',
'first tile has correct left'); 'first tile has correct left');
t.eq(backBuffer.childNodes[0].style.top, '0px', t.eq(backBuffer.childNodes[0].style.top, '0px',