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https://github.com/bpatrik/pigallery2.git
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64 lines
1.9 KiB
TypeScript
64 lines
1.9 KiB
TypeScript
import {PhotoDTO} from "../../../../common/entities/PhotoDTO";
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export class GridRowBuilder {
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private photoRow: Array<PhotoDTO> = [];
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private photoIndex:number = 0; //index of the last pushed photo to the photoRow
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constructor(private photos: Array<PhotoDTO>, private startIndex: number, private photoMargin: number, private containerWidth: number) {
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this.photoIndex = startIndex;
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}
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public addPhotos(number:number) {
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for (let i = 0; i < number; i++) {
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this.addPhoto();
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}
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}
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public addPhoto():boolean {
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if (this.photoIndex + 1 > this.photos.length) {
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return false;
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}
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this.photoRow.push(this.photos[this.photoIndex]);
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this.photoIndex++;
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return true;
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}
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public removePhoto():boolean {
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if (this.photoIndex - 1 < this.startIndex) {
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return false;
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}
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this.photoIndex--;
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this.photoRow.pop();
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return true;
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}
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public getPhotoRow(): Array<PhotoDTO> {
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return this.photoRow;
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}
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public adjustRowHeightBetween(minHeight:number, maxHeight:number) {
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while (this.calcRowHeight() > maxHeight && this.addPhoto() === true) { //row too high -> add more images
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}
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while (this.calcRowHeight() < minHeight && this.removePhoto() === true) { //roo too small -> remove images
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}
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//keep at least one photo int thr row
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if (this.photoRow.length <= 0) {
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this.addPhoto();
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}
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}
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public calcRowHeight():number {
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let width = 0;
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for (let i = 0; i < this.photoRow.length; i++) {
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width += ((this.photoRow[i].metadata.size.width) / (this.photoRow[i].metadata.size.height)); //summing up aspect ratios
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}
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let height = (this.containerWidth - this.photoRow.length * (this.photoMargin * 2) - 1) / width; //cant be equal -> width-1
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return height + (this.photoMargin * 2);
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};
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} |