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Separate layers and overlays to ensure that overlays are always on top of layers.

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This commit is contained in:
Antoine Vandecreme 2014-03-20 09:56:12 -04:00
parent ba10c392a1
commit 73eaf2ce96
1 changed files with 22 additions and 15 deletions
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33
src/viewer.js
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@ -128,6 +128,8 @@ $.Viewer = function( options ) {
// Overlays list. An overlay allows to add html on top of the viewer.
overlays: [],
// Container inside the canvas where overlays are drawn.
overlaysContainer: null,
//private state properties
previousBody: [],
@ -150,6 +152,8 @@ $.Viewer = function( options ) {
*/
drawer: null,
drawers: [],
// Container inside the canvas where drawers (layers) are drawn.
drawersContainer: null,
/**
* Handles coordinate-related functionality - zoom, pan, rotation, etc. Created for each TileSource opened.
* @member {OpenSeadragon.Viewport} viewport
@ -260,6 +264,8 @@ $.Viewer = function( options ) {
this.element = this.element || document.getElementById( this.id );
this.canvas = $.makeNeutralElement( "div" );
this.keyboardCommandArea = $.makeNeutralElement( "textarea" );
this.drawersContainer = $.makeNeutralElement( "div" );
this.overlaysContainer = $.makeNeutralElement( "div" );
this.canvas.className = "openseadragon-canvas";
(function( style ){
@ -297,6 +303,8 @@ $.Viewer = function( options ) {
this.container.insertBefore( this.canvas, this.container.firstChild );
this.container.insertBefore( this.keyboardCommandArea, this.container.firstChild );
this.element.appendChild( this.container );
this.canvas.appendChild( this.drawersContainer );
this.canvas.appendChild( this.overlaysContainer );
//Used for toggling between fullscreen and default container size
//TODO: these can be closure private and shared across Viewer
@ -517,16 +525,15 @@ $.extend( $.Viewer.prototype, $.EventSource.prototype, $.ControlDock.prototype,
}
this.clearOverlays();
this.drawersContainer.innerHTML = "";
this.overlaysContainer.innerHTML = "";
this.source = null;
this.drawer = null;
this.drawers = [];
this.viewport = this.preserveViewport ? this.viewport : null;
//this.profiler = null;
if (this.canvas){
this.canvas.innerHTML = "";
}
VIEWERS[ this.hash ] = null;
delete VIEWERS[ this.hash ];
@ -1001,9 +1008,10 @@ $.extend( $.Viewer.prototype, $.EventSource.prototype, $.ControlDock.prototype,
* supports except arrays of images as layers cannot be sequences.
* @function
* @param {Object} options
* @param {String|Object|Function} [options.tileSource] The TileSource of the layer.
* @param {String|Object|Function} options.tileSource The TileSource of the layer.
* @param {Number} [options.opacity=1] The opacity of the layer.
* @param {Number} [options.level] The level of the layer.
* @param {Number} [options.level] The level of the layer. Added on top of
* all other layers if not specified.
* @returns {OpenSeadragon.Viewer} Chainable.
* @fires OpenSeadragon.Viewer.event:add-layer
* @fires OpenSeadragon.Viewer.event:add-layer-failed
@ -1065,7 +1073,7 @@ $.extend( $.Viewer.prototype, $.EventSource.prototype, $.ControlDock.prototype,
viewer: _this,
source: tileSource,
viewport: _this.viewport,
element: _this.canvas,
element: _this.drawersContainer,
opacity: options.opacity !== undefined ?
options.opacity : _this.opacity,
maxImageCacheCount: _this.maxImageCacheCount,
@ -1165,7 +1173,7 @@ $.extend( $.Viewer.prototype, $.EventSource.prototype, $.ControlDock.prototype,
}
this.drawers.splice( oldLevel, 1 );
this.drawers.splice( level, 0, drawer );
this.canvas.removeChild( drawer.canvas );
this.drawersContainer.removeChild( drawer.canvas );
if ( level === 0 ) {
var nextLevelCanvas = this.drawers[ 1 ].canvas;
nextLevelCanvas.parentNode.insertBefore( drawer.canvas,
@ -1223,7 +1231,7 @@ $.extend( $.Viewer.prototype, $.EventSource.prototype, $.ControlDock.prototype,
}
this.drawers.splice( index, 1 );
this.canvas.removeChild( drawer.canvas );
this.drawersContainer.removeChild( drawer.canvas );
/**
* Raised when a layer is removed.
* @event remove-layer
@ -1841,7 +1849,6 @@ function openTileSource( viewer, source ) {
_this.close( );
}
_this.canvas.innerHTML = "";
THIS[ _this.hash ].prevContainerSize = _getSafeElemSize( _this.container );
@ -1901,7 +1908,7 @@ function openTileSource( viewer, source ) {
viewer: _this,
source: _this.source,
viewport: _this.viewport,
element: _this.canvas,
element: _this.drawersContainer,
opacity: _this.opacity,
maxImageCacheCount: _this.maxImageCacheCount,
imageLoaderLimit: _this.imageLoaderLimit,
@ -2464,7 +2471,7 @@ function updateOnce( viewer ) {
if ( animated ) {
updateDrawers( viewer );
drawOverlays( viewer.viewport, viewer.currentOverlays, viewer.canvas );
drawOverlays( viewer.viewport, viewer.currentOverlays, viewer.overlaysContainer );
if( viewer.navigator ){
viewer.navigator.update( viewer.viewport );
}
@ -2480,7 +2487,7 @@ function updateOnce( viewer ) {
viewer.raiseEvent( "animation" );
} else if ( THIS[ viewer.hash ].forceRedraw || drawersNeedUpdate( viewer ) ) {
updateDrawers( viewer );
drawOverlays( viewer.viewport, viewer.currentOverlays, viewer.canvas );
drawOverlays( viewer.viewport, viewer.currentOverlays, viewer.overlaysContainer );
if( viewer.navigator ){
viewer.navigator.update( viewer.viewport );
}