angular-combobox-change-method

angular-combobox-change-method

protected change(candidate: any, isCustom: boolean = false): void {
    const currentValue: any = Util.getter(this.value, this.valueField);

    this.open = false;

    if (isCustom) {
        this.handleCustomValue(candidate, currentValue);
    } else {
        this.handleValue(candidate, currentValue);
    }

    this._previousValue = this.value;
    
    this.onChangeCallback(this.value);
    this.valueChange.emit(this.value);
}

protected handleCustomValue(candidate: any, currentValue: any): void {
    this.dataItem = undefined;

    if(!this.allowCustom) {
        this.text = undefined;
        this.value = undefined;
        return;
    }

    const normalizedValue = this.normalizeValue(candidate);

    if (Util.getter(normalizedValue, this.valueField) === currentValue) {
        return;
    }

    this.value = normalizedValue;
}

protected handleValue(candidate: any, currentValue: any): void {
    const newValue = Util.getter(candidate, this.valueField);
    const newText = Util.getter(candidate, this.textField);

    if (currentValue === newValue && this.text === newText) {
        return;
    }

    this.dataItem = candidate;
    this.value = this.valuePrimitive ? newValue : candidate;
    this.text = newText;
}