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84 lines
2.1 KiB
84 lines
2.1 KiB
/**
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* @author HypnosNova / https://www.threejs.org.cn/gallery
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*/
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THREE.SelectionHelper = ( function () {
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function SelectionHelper( selectionBox, renderer, cssClassName ) {
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this.element = document.createElement( 'div' );
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this.element.classList.add( cssClassName );
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this.element.style.pointerEvents = 'none';
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this.renderer = renderer;
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this.startPoint = { x: 0, y: 0 };
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this.pointTopLeft = { x: 0, y: 0 };
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this.pointBottomRight = { x: 0, y: 0 };
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this.isDown = false;
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this.renderer.domElement.addEventListener( 'mousedown', function ( event ) {
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this.isDown = true;
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this.onSelectStart( event );
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}.bind( this ), false );
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this.renderer.domElement.addEventListener( 'mousemove', function ( event ) {
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if ( this.isDown ) {
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this.onSelectMove( event );
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}
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}.bind( this ), false );
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this.renderer.domElement.addEventListener( 'mouseup', function ( event ) {
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this.isDown = false;
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this.onSelectOver( event );
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}.bind( this ), false );
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}
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SelectionHelper.prototype.onSelectStart = function ( event ) {
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this.renderer.domElement.parentElement.appendChild( this.element );
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this.element.style.left = event.clientX + 'px';
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this.element.style.top = event.clientY + 'px';
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this.element.style.width = '0px';
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this.element.style.height = '0px';
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this.startPoint.x = event.clientX;
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this.startPoint.y = event.clientY;
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};
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SelectionHelper.prototype.onSelectMove = function ( event ) {
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this.pointBottomRight.x = Math.max( this.startPoint.x, event.clientX );
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this.pointBottomRight.y = Math.max( this.startPoint.y, event.clientY );
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this.pointTopLeft.x = Math.min( this.startPoint.x, event.clientX );
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this.pointTopLeft.y = Math.min( this.startPoint.y, event.clientY );
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this.element.style.left = this.pointTopLeft.x + 'px';
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this.element.style.top = this.pointTopLeft.y + 'px';
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this.element.style.width = ( this.pointBottomRight.x - this.pointTopLeft.x ) + 'px';
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this.element.style.height = ( this.pointBottomRight.y - this.pointTopLeft.y ) + 'px';
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};
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SelectionHelper.prototype.onSelectOver = function () {
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this.element.parentElement.removeChild( this.element );
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};
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return SelectionHelper;
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} )();
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