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74 lines
2.0 KiB
74 lines
2.0 KiB
( function () {
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class SelectionHelper {
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constructor( 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 = new THREE.Vector2();
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this.pointTopLeft = new THREE.Vector2();
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this.pointBottomRight = new THREE.Vector2();
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this.isDown = false;
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this.renderer.domElement.addEventListener( 'pointerdown', function ( event ) {
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this.isDown = true;
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this.onSelectStart( event );
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}.bind( this ) );
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this.renderer.domElement.addEventListener( 'pointermove', 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 ) );
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this.renderer.domElement.addEventListener( 'pointerup', function ( event ) {
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this.isDown = false;
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this.onSelectOver( event );
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}.bind( this ) );
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}
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onSelectStart( 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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onSelectMove( 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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onSelectOver() {
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this.element.parentElement.removeChild( this.element );
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}
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}
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THREE.SelectionHelper = SelectionHelper;
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} )();
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