/**
 * @author mrdoob / http://mrdoob.com/
 */

Sidebar.Material = function ( editor ) {

	var signals = editor.signals;
	var currentObject;

	var container = new UI.CollapsiblePanel();
	container.setCollapsed( editor.config.getKey( 'ui/sidebar/material/collapsed' ) );
	container.onCollapsedChange( function ( boolean ) {

		editor.config.setKey( 'ui/sidebar/material/collapsed', boolean );

	} );
	container.setDisplay( 'none' );
	container.dom.classList.add( 'Material' );

	container.addStatic( new UI.Text().setValue( 'MATERIAL' ) );
	container.add( new UI.Break() );

	// uuid

	var materialUUIDRow = new UI.Panel();
	var materialUUID = new UI.Input().setWidth( '115px' ).setFontSize( '12px' ).setDisabled( true );
	var materialUUIDRenew = new UI.Button( '⟳' ).setMarginLeft( '7px' ).onClick( function () {

		materialUUID.setValue( THREE.Math.generateUUID() );
		update();

	} );

	materialUUIDRow.add( new UI.Text( 'UUID' ).setWidth( '90px' ) );
	materialUUIDRow.add( materialUUID );
	materialUUIDRow.add( materialUUIDRenew );

	container.add( materialUUIDRow );

	// name

	var materialNameRow = new UI.Panel();
	var materialName = new UI.Input().setWidth( '150px' ).setFontSize( '12px' ).onChange( function () {

		editor.setMaterialName( editor.selected.material, materialName.getValue() );

	} );

	materialNameRow.add( new UI.Text( 'Name' ).setWidth( '90px' ) );
	materialNameRow.add( materialName );

	container.add( materialNameRow );

	// class

	var materialClassRow = new UI.Panel();
	var materialClass = new UI.Select().setOptions( {

		'LineBasicMaterial': 'LineBasicMaterial',
		'LineDashedMaterial': 'LineDashedMaterial',
		'MeshBasicMaterial': 'MeshBasicMaterial',
		'MeshDepthMaterial': 'MeshDepthMaterial',
		'MeshLambertMaterial': 'MeshLambertMaterial',
		'MeshNormalMaterial': 'MeshNormalMaterial',
		'MeshPhongMaterial': 'MeshPhongMaterial',
		'ShaderMaterial': 'ShaderMaterial',
		'SpriteMaterial': 'SpriteMaterial'

	} ).setWidth( '150px' ).setFontSize( '12px' ).onChange( update );

	materialClassRow.add( new UI.Text( 'Type' ).setWidth( '90px' ) );
	materialClassRow.add( materialClass );

	container.add( materialClassRow );

	// program

	var materialProgramRow = new UI.Panel();
	materialProgramRow.add( new UI.Text( 'Program' ).setWidth( '90px' ) );

	var materialProgramInfo = new UI.Button( 'Info' );
	materialProgramInfo.setMarginLeft( '4px' );
	materialProgramInfo.onClick( function () {

		signals.editScript.dispatch( currentObject.material, 'programInfo' );

	} );
	materialProgramRow.add( materialProgramInfo );

	var materialProgramVertex = new UI.Button( 'Vertex' );
	materialProgramVertex.setMarginLeft( '4px' );
	materialProgramVertex.onClick( function () {

		signals.editScript.dispatch( currentObject.material, 'vertexShader' );

	} );
	materialProgramRow.add( materialProgramVertex );

	var materialProgramFragment = new UI.Button( 'Fragment' );
	materialProgramFragment.setMarginLeft( '4px' );
	materialProgramFragment.onClick( function () {

		signals.editScript.dispatch( currentObject.material, 'fragmentShader' );

	} );
	materialProgramRow.add( materialProgramFragment );

	container.add( materialProgramRow );

	// color

	var materialColorRow = new UI.Panel();
	var materialColor = new UI.Color().onChange( update );

	materialColorRow.add( new UI.Text( 'Color' ).setWidth( '90px' ) );
	materialColorRow.add( materialColor );

	container.add( materialColorRow );

	// emissive

	var materialEmissiveRow = new UI.Panel();
	var materialEmissive = new UI.Color().setHexValue( 0x000000 ).onChange( update );

	materialEmissiveRow.add( new UI.Text( 'Emissive' ).setWidth( '90px' ) );
	materialEmissiveRow.add( materialEmissive );

	container.add( materialEmissiveRow );

	// specular

	var materialSpecularRow = new UI.Panel();
	var materialSpecular = new UI.Color().setHexValue( 0x111111 ).onChange( update );

	materialSpecularRow.add( new UI.Text( 'Specular' ).setWidth( '90px' ) );
	materialSpecularRow.add( materialSpecular );

	container.add( materialSpecularRow );

	// shininess

	var materialShininessRow = new UI.Panel();
	var materialShininess = new UI.Number( 30 ).onChange( update );

	materialShininessRow.add( new UI.Text( 'Shininess' ).setWidth( '90px' ) );
	materialShininessRow.add( materialShininess );

	container.add( materialShininessRow );

	// vertex colors

	var materialVertexColorsRow = new UI.Panel();
	var materialVertexColors = new UI.Select().setOptions( {

		0: 'No',
		1: 'Face',
		2: 'Vertex'

	} ).onChange( update );

	materialVertexColorsRow.add( new UI.Text( 'Vertex Colors' ).setWidth( '90px' ) );
	materialVertexColorsRow.add( materialVertexColors );

	container.add( materialVertexColorsRow );

	// skinning

	var materialSkinningRow = new UI.Panel();
	var materialSkinning = new UI.Checkbox( false ).onChange( update );

	materialSkinningRow.add( new UI.Text( 'Skinning' ).setWidth( '90px' ) );
	materialSkinningRow.add( materialSkinning );

	container.add( materialSkinningRow );

	// map

	var materialMapRow = new UI.Panel();
	var materialMapEnabled = new UI.Checkbox( false ).onChange( update );
	var materialMap = new UI.Texture().onChange( update );

	materialMapRow.add( new UI.Text( 'Map' ).setWidth( '90px' ) );
	materialMapRow.add( materialMapEnabled );
	materialMapRow.add( materialMap );

	container.add( materialMapRow );

	// alpha map

	var materialAlphaMapRow = new UI.Panel();
	var materialAlphaMapEnabled = new UI.Checkbox( false ).onChange( update );
	var materialAlphaMap = new UI.Texture().onChange( update );

	materialAlphaMapRow.add( new UI.Text( 'Alpha Map' ).setWidth( '90px' ) );
	materialAlphaMapRow.add( materialAlphaMapEnabled );
	materialAlphaMapRow.add( materialAlphaMap );

	container.add( materialAlphaMapRow );

	// bump map

	var materialBumpMapRow = new UI.Panel();
	var materialBumpMapEnabled = new UI.Checkbox( false ).onChange( update );
	var materialBumpMap = new UI.Texture().onChange( update );
	var materialBumpScale = new UI.Number( 1 ).setWidth( '30px' ).onChange( update );

	materialBumpMapRow.add( new UI.Text( 'Bump Map' ).setWidth( '90px' ) );
	materialBumpMapRow.add( materialBumpMapEnabled );
	materialBumpMapRow.add( materialBumpMap );
	materialBumpMapRow.add( materialBumpScale );

	container.add( materialBumpMapRow );

	// normal map

	var materialNormalMapRow = new UI.Panel();
	var materialNormalMapEnabled = new UI.Checkbox( false ).onChange( update );
	var materialNormalMap = new UI.Texture().onChange( update );

	materialNormalMapRow.add( new UI.Text( 'Normal Map' ).setWidth( '90px' ) );
	materialNormalMapRow.add( materialNormalMapEnabled );
	materialNormalMapRow.add( materialNormalMap );

	container.add( materialNormalMapRow );

	// displacement map

	var materialDisplacementMapRow = new UI.Panel();
	var materialDisplacementMapEnabled = new UI.Checkbox( false ).onChange( update );
	var materialDisplacementMap = new UI.Texture().onChange( update );
	var materialDisplacementScale = new UI.Number( 1 ).setWidth( '30px' ).onChange( update );

	materialDisplacementMapRow.add( new UI.Text( 'Displace Map' ).setWidth( '90px' ) );
	materialDisplacementMapRow.add( materialDisplacementMapEnabled );
	materialDisplacementMapRow.add( materialDisplacementMap );
	materialDisplacementMapRow.add( materialDisplacementScale );

	container.add( materialDisplacementMapRow );

	// specular map

	var materialSpecularMapRow = new UI.Panel();
	var materialSpecularMapEnabled = new UI.Checkbox( false ).onChange( update );
	var materialSpecularMap = new UI.Texture().onChange( update );

	materialSpecularMapRow.add( new UI.Text( 'Specular Map' ).setWidth( '90px' ) );
	materialSpecularMapRow.add( materialSpecularMapEnabled );
	materialSpecularMapRow.add( materialSpecularMap );

	container.add( materialSpecularMapRow );

	// env map

	var materialEnvMapRow = new UI.Panel();
	var materialEnvMapEnabled = new UI.Checkbox( false ).onChange( update );
	var materialEnvMap = new UI.Texture( THREE.SphericalReflectionMapping ).onChange( update );
	var materialReflectivity = new UI.Number( 1 ).setWidth( '30px' ).onChange( update );

	materialEnvMapRow.add( new UI.Text( 'Env Map' ).setWidth( '90px' ) );
	materialEnvMapRow.add( materialEnvMapEnabled );
	materialEnvMapRow.add( materialEnvMap );
	materialEnvMapRow.add( materialReflectivity );

	container.add( materialEnvMapRow );

	// light map

	var materialLightMapRow = new UI.Panel();
	var materialLightMapEnabled = new UI.Checkbox( false ).onChange( update );
	var materialLightMap = new UI.Texture().onChange( update );

	materialLightMapRow.add( new UI.Text( 'Light Map' ).setWidth( '90px' ) );
	materialLightMapRow.add( materialLightMapEnabled );
	materialLightMapRow.add( materialLightMap );

	container.add( materialLightMapRow );

	// ambient occlusion map

	var materialAOMapRow = new UI.Panel();
	var materialAOMapEnabled = new UI.Checkbox( false ).onChange( update );
	var materialAOMap = new UI.Texture().onChange( update );
	var materialAOScale = new UI.Number( 1 ).setRange( 0, 1 ).setWidth( '30px' ).onChange( update );

	materialAOMapRow.add( new UI.Text( 'AO Map' ).setWidth( '90px' ) );
	materialAOMapRow.add( materialAOMapEnabled );
	materialAOMapRow.add( materialAOMap );
	materialAOMapRow.add( materialAOScale );

	container.add( materialAOMapRow );

	// side

	var materialSideRow = new UI.Panel();
	var materialSide = new UI.Select().setOptions( {

		0: 'Front',
		1: 'Back',
		2: 'Double'

	} ).setWidth( '150px' ).setFontSize( '12px' ).onChange( update );

	materialSideRow.add( new UI.Text( 'Side' ).setWidth( '90px' ) );
	materialSideRow.add( materialSide );

	container.add( materialSideRow );

	// shading

	var materialShadingRow = new UI.Panel();
	var materialShading = new UI.Select().setOptions( {

		0: 'No',
		1: 'Flat',
		2: 'Smooth'

	} ).setWidth( '150px' ).setFontSize( '12px' ).onChange( update );

	materialShadingRow.add( new UI.Text( 'Shading' ).setWidth( '90px' ) );
	materialShadingRow.add( materialShading );

	container.add( materialShadingRow );

	// blending

	var materialBlendingRow = new UI.Panel();
	var materialBlending = new UI.Select().setOptions( {

		0: 'No',
		1: 'Normal',
		2: 'Additive',
		3: 'Subtractive',
		4: 'Multiply',
		5: 'Custom'

	} ).setWidth( '150px' ).setFontSize( '12px' ).onChange( update );

	materialBlendingRow.add( new UI.Text( 'Blending' ).setWidth( '90px' ) );
	materialBlendingRow.add( materialBlending );

	container.add( materialBlendingRow );

	// opacity

	var materialOpacityRow = new UI.Panel();
	var materialOpacity = new UI.Number().setWidth( '60px' ).setRange( 0, 1 ).onChange( update );

	materialOpacityRow.add( new UI.Text( 'Opacity' ).setWidth( '90px' ) );
	materialOpacityRow.add( materialOpacity );

	container.add( materialOpacityRow );

	// transparent

	var materialTransparentRow = new UI.Panel();
	var materialTransparent = new UI.Checkbox().setLeft( '100px' ).onChange( update );

	materialTransparentRow.add( new UI.Text( 'Transparent' ).setWidth( '90px' ) );
	materialTransparentRow.add( materialTransparent );

	container.add( materialTransparentRow );

	// alpha test

	var materialAlphaTestRow = new UI.Panel();
	var materialAlphaTest = new UI.Number().setWidth( '60px' ).setRange( 0, 1 ).onChange( update );

	materialAlphaTestRow.add( new UI.Text( 'Alpha Test' ).setWidth( '90px' ) );
	materialAlphaTestRow.add( materialAlphaTest );

	container.add( materialAlphaTestRow );

	// wireframe

	var materialWireframeRow = new UI.Panel();
	var materialWireframe = new UI.Checkbox( false ).onChange( update );
	var materialWireframeLinewidth = new UI.Number( 1 ).setWidth( '60px' ).setRange( 0, 100 ).onChange( update );

	materialWireframeRow.add( new UI.Text( 'Wireframe' ).setWidth( '90px' ) );
	materialWireframeRow.add( materialWireframe );
	materialWireframeRow.add( materialWireframeLinewidth );

	container.add( materialWireframeRow );

	//

	function update() {

		var object = currentObject;

		var geometry = object.geometry;
		var material = object.material;

		var textureWarning = false;
		var objectHasUvs = false;

		if ( object instanceof THREE.Sprite ) objectHasUvs = true;
		if ( geometry instanceof THREE.Geometry && geometry.faceVertexUvs[ 0 ].length > 0 ) objectHasUvs = true;
		if ( geometry instanceof THREE.BufferGeometry && geometry.attributes.uv !== undefined ) objectHasUvs = true;

		if ( material ) {

			if ( material.uuid !== undefined ) {

				material.uuid = materialUUID.getValue();

			}

			if ( material instanceof THREE[ materialClass.getValue() ] === false ) {

				material = new THREE[ materialClass.getValue() ]();

				object.material = material;
				// TODO Copy other references in the scene graph
				// keeping name and UUID then.
				// Also there should be means to create a unique
				// copy for the current object explicitly and to
				// attach the current material to other objects.

			}

			if ( material.color !== undefined ) {

				material.color.setHex( materialColor.getHexValue() );

			}

			if ( material.emissive !== undefined ) {

				material.emissive.setHex( materialEmissive.getHexValue() );

			}

			if ( material.specular !== undefined ) {

				material.specular.setHex( materialSpecular.getHexValue() );

			}

			if ( material.shininess !== undefined ) {

				material.shininess = materialShininess.getValue();

			}

			if ( material.vertexColors !== undefined ) {

				var vertexColors = parseInt( materialVertexColors.getValue() );

				if ( material.vertexColors !== vertexColors ) {

					material.vertexColors = vertexColors;
					material.needsUpdate = true;

				}

			}

			if ( material.skinning !== undefined ) {

				material.skinning = materialSkinning.getValue();

			}

			if ( material.map !== undefined ) {

				var mapEnabled = materialMapEnabled.getValue() === true;

				if ( objectHasUvs ) {

					material.map = mapEnabled ? materialMap.getValue() : null;
					material.needsUpdate = true;

				} else {

					if ( mapEnabled ) textureWarning = true;

				}

			}

			if ( material.alphaMap !== undefined ) {

				var mapEnabled = materialAlphaMapEnabled.getValue() === true;

				if ( objectHasUvs ) {

					material.alphaMap = mapEnabled ? materialAlphaMap.getValue() : null;
					material.needsUpdate = true;

				} else {

					if ( mapEnabled ) textureWarning = true;

				}

			}

			if ( material.bumpMap !== undefined ) {

				var bumpMapEnabled = materialBumpMapEnabled.getValue() === true;

				if ( objectHasUvs ) {

					material.bumpMap = bumpMapEnabled ? materialBumpMap.getValue() : null;
					material.bumpScale = materialBumpScale.getValue();
					material.needsUpdate = true;

				} else {

					if ( bumpMapEnabled ) textureWarning = true;

				}

			}

			if ( material.normalMap !== undefined ) {

				var normalMapEnabled = materialNormalMapEnabled.getValue() === true;

				if ( objectHasUvs ) {

					material.normalMap = normalMapEnabled ? materialNormalMap.getValue() : null;
					material.needsUpdate = true;

				} else {

					if ( normalMapEnabled ) textureWarning = true;

				}

			}

			if ( material.displacementMap !== undefined ) {

				var displacementMapEnabled = materialDisplacementMapEnabled.getValue() === true;

				if ( objectHasUvs ) {

					material.displacementMap = displacementMapEnabled ? materialDisplacementMap.getValue() : null;
					material.displacementScale = materialDisplacementScale.getValue();
					material.needsUpdate = true;

				} else {

					if ( displacementMapEnabled ) textureWarning = true;

				}

			}

			if ( material.specularMap !== undefined ) {

				var specularMapEnabled = materialSpecularMapEnabled.getValue() === true;

				if ( objectHasUvs ) {

					material.specularMap = specularMapEnabled ? materialSpecularMap.getValue() : null;
					material.needsUpdate = true;

				} else {

					if ( specularMapEnabled ) textureWarning = true;

				}

			}

			if ( material.envMap !== undefined ) {

				var envMapEnabled = materialEnvMapEnabled.getValue() === true;

				material.envMap = envMapEnabled ? materialEnvMap.getValue() : null;
				material.reflectivity = materialReflectivity.getValue();
				material.needsUpdate = true;

			}


			if ( material.lightMap !== undefined ) {

				var lightMapEnabled = materialLightMapEnabled.getValue() === true;

				if ( objectHasUvs ) {

					material.lightMap = lightMapEnabled ? materialLightMap.getValue() : null;
					material.needsUpdate = true;

				} else {

					if ( lightMapEnabled ) textureWarning = true;

				}

			}

			if ( material.aoMap !== undefined ) {

				var aoMapEnabled = materialAOMapEnabled.getValue() === true;

				if ( objectHasUvs ) {

					material.aoMap = aoMapEnabled ? materialAOMap.getValue() : null;
					material.aoMapIntensity = materialAOScale.getValue();
					material.needsUpdate = true;

				} else {

					if ( aoMapEnabled ) textureWarning = true;

				}

			}

			if ( material.side !== undefined ) {

				material.side = parseInt( materialSide.getValue() );

			}

			if ( material.shading !== undefined ) {

				material.shading = parseInt( materialShading.getValue() );

			}

			if ( material.blending !== undefined ) {

				material.blending = parseInt( materialBlending.getValue() );

			}

			if ( material.opacity !== undefined ) {

				material.opacity = materialOpacity.getValue();

			}

			if ( material.transparent !== undefined ) {

				material.transparent = materialTransparent.getValue();

			}

			if ( material.alphaTest !== undefined ) {

				material.alphaTest = materialAlphaTest.getValue();

			}

			if ( material.wireframe !== undefined ) {

				material.wireframe = materialWireframe.getValue();

			}

			if ( material.wireframeLinewidth !== undefined ) {

				material.wireframeLinewidth = materialWireframeLinewidth.getValue();

			}

			refreshUi(false);

			signals.materialChanged.dispatch( material );

		}

		if ( textureWarning ) {

			console.warn( "Can't set texture, model doesn't have texture coordinates" );

		}

	};

	//

	function setRowVisibility() {

		var properties = {
			'name': materialNameRow,
			'color': materialColorRow,
			'emissive': materialEmissiveRow,
			'specular': materialSpecularRow,
			'shininess': materialShininessRow,
			'vertexShader': materialProgramRow,
			'vertexColors': materialVertexColorsRow,
			'skinning': materialSkinningRow,
			'map': materialMapRow,
			'alphaMap': materialAlphaMapRow,
			'bumpMap': materialBumpMapRow,
			'normalMap': materialNormalMapRow,
			'displacementMap': materialDisplacementMapRow,
			'specularMap': materialSpecularMapRow,
			'envMap': materialEnvMapRow,
			'lightMap': materialLightMapRow,
			'aoMap': materialAOMapRow,
			'side': materialSideRow,
			'shading': materialShadingRow,
			'blending': materialBlendingRow,
			'opacity': materialOpacityRow,
			'transparent': materialTransparentRow,
			'alphaTest': materialAlphaTestRow,
			'wireframe': materialWireframeRow
		};

		var material = currentObject.material;

		for ( var property in properties ) {

			properties[ property ].setDisplay( material[ property ] !== undefined ? '' : 'none' );

		}

	};


	function refreshUi( resetTextureSelectors ) {

		var material = currentObject.material;

		if ( material.uuid !== undefined ) {

			materialUUID.setValue( material.uuid );

		}

		if ( material.name !== undefined ) {

			materialName.setValue( material.name );

		}

		materialClass.setValue( material.type );

		if ( material.color !== undefined ) {

			materialColor.setHexValue( material.color.getHexString() );

		}

		if ( material.emissive !== undefined ) {

			materialEmissive.setHexValue( material.emissive.getHexString() );

		}

		if ( material.specular !== undefined ) {

			materialSpecular.setHexValue( material.specular.getHexString() );

		}

		if ( material.shininess !== undefined ) {

			materialShininess.setValue( material.shininess );

		}

		if ( material.vertexColors !== undefined ) {

			materialVertexColors.setValue( material.vertexColors );

		}

		if ( material.skinning !== undefined ) {

			materialSkinning.setValue( material.skinning );

		}

		if ( material.map !== undefined ) {

			materialMapEnabled.setValue( material.map !== null );

			if ( material.map !== null || resetTextureSelectors ) {

				materialMap.setValue( material.map );

			}

		}

		if ( material.alphaMap !== undefined ) {

			materialAlphaMapEnabled.setValue( material.alphaMap !== null );

			if ( material.alphaMap !== null || resetTextureSelectors ) {

				materialAlphaMap.setValue( material.alphaMap );

			}

		}

		if ( material.bumpMap !== undefined ) {

			materialBumpMapEnabled.setValue( material.bumpMap !== null );

			if ( material.bumpMap !== null || resetTextureSelectors ) {

				materialBumpMap.setValue( material.bumpMap );

			}

			materialBumpScale.setValue( material.bumpScale );

		}

		if ( material.normalMap !== undefined ) {

			materialNormalMapEnabled.setValue( material.normalMap !== null );

			if ( material.normalMap !== null || resetTextureSelectors ) {

				materialNormalMap.setValue( material.normalMap );

			}

		}

		if ( material.displacementMap !== undefined ) {

			materialDisplacementMapEnabled.setValue( material.displacementMap !== null );

			if ( material.displacementMap !== null || resetTextureSelectors ) {

				materialDisplacementMap.setValue( material.displacementMap );

			}

			materialDisplacementScale.setValue( material.displacementScale );

		}

		if ( material.specularMap !== undefined ) {

			materialSpecularMapEnabled.setValue( material.specularMap !== null );

			if ( material.specularMap !== null || resetTextureSelectors ) {

				materialSpecularMap.setValue( material.specularMap );

			}

		}

		if ( material.envMap !== undefined ) {

			materialEnvMapEnabled.setValue( material.envMap !== null );

			if ( material.envMap !== null || resetTextureSelectors ) {

				materialEnvMap.setValue( material.envMap );

			}

			materialReflectivity.setValue( material.reflectivity );

		}

		if ( material.lightMap !== undefined ) {

			materialLightMapEnabled.setValue( material.lightMap !== null );

			if ( material.lightMap !== null || resetTextureSelectors ) {

				materialLightMap.setValue( material.lightMap );

			}

		}

		if ( material.aoMap !== undefined ) {

			materialAOMapEnabled.setValue( material.aoMap !== null );

			if ( material.aoMap !== null || resetTextureSelectors ) {

				materialAOMap.setValue( material.aoMap );

			}

			materialAOScale.setValue( material.aoMapIntensity );

		}

		if ( material.side !== undefined ) {

			materialSide.setValue( material.side );

		}

		if ( material.shading !== undefined ) {

			materialShading.setValue( material.shading );

		}

		if ( material.blending !== undefined ) {

			materialBlending.setValue( material.blending );

		}

		if ( material.opacity !== undefined ) {

			materialOpacity.setValue( material.opacity );

		}

		if ( material.transparent !== undefined ) {

			materialTransparent.setValue( material.transparent );

		}

		if ( material.alphaTest !== undefined ) {

			materialAlphaTest.setValue( material.alphaTest );

		}

		if ( material.wireframe !== undefined ) {

			materialWireframe.setValue( material.wireframe );

		}

		if ( material.wireframeLinewidth !== undefined ) {

			materialWireframeLinewidth.setValue( material.wireframeLinewidth );

		}

		setRowVisibility();

	}

	// events

	signals.objectSelected.add( function ( object ) {

		if ( object && object.material ) {

			var objectChanged = object !== currentObject;

			currentObject = object;
			refreshUi(objectChanged);
			container.setDisplay( '' );

		} else {

			currentObject = null;
			container.setDisplay( 'none' );

		}

	} );

	return container;

}