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javascript - 如果在垫步进器之前打开任何文档，如何禁用/停止 HostListener？

问题描述

在我的应用程序中，我使用的是 Mat stepper。我正在聆听关键字“输入”并保存表单并重定向到下一步。我的问题是在步进器 4 上说我有两个按钮添加和编辑假设我单击编辑它会在步进器 4 之前打开文档的短窗口以编辑表单并在单击输入时保存数据并关闭文档查看器同时步进器也听输入关键字并进入下一步。如果打开任何文档，我想禁用 HostListener。

@HostListener('document:keydown', ['$event'])
handleKeyboardEvent(event: KeyboardEvent) {
  if (event.key == 'Enter') {
    if (this.selectedStepper == '0') {
      if (this.firstForm.valid) {
        console.log('Stepper 1', this.fifthForm.valid)
        this.onFirstSubmit()
        this.stepper.next()
      } else {
        this.toastrService.danger('Incomplete Form', 'Message')
      }
    } else if (this.selectedStepper == '1') {
      if (this.secondForm.valid) {
        console.log('Stepper 2', this.secondForm.valid)
        this.onSecondSubmit(this.country_birth)
        this.stepper.next()
      } else {
        this.toastrService.danger('Incomplete Form', 'Message')
      }
    } else if (this.selectedStepper == '2') {
      if (this.thirdForm.valid) {
        console.log('Stepper 3', this.thirdForm.valid)
        this.onThirdSubmit()
        this.stepper.next()
      } else {
        this.toastrService.danger('Incomplete Form', 'Message')
      }
    } else if (this.selectedStepper == '3') {
      if (this.fourthForm.valid) {
        console.log('Stepper 4', this.fourthForm.valid)
        this.onFourthSubmit()
        // this.stepper.next();
      } else {
        this.toastrService.danger('Incomplete Form', 'Message')
      }
    } else if (this.selectedStepper == '4') {
      if (this.fifthForm.valid) {
        console.log('Stepper 5', this.fifthForm.valid)
        this.onFifthSubmit()
        this.stepper.next()
      } else {
        this.toastrService.danger('Incomplete Form', 'Message')
      }
    } else if (this.selectedStepper == '5') {
      if (this.profileCompleteness == true) {
        console.log('Stepper 6')
        this.quickApply()
      } else {
        this.toastrService.danger('Incomplete Form', 'Message')
      }
    }
  }
}

stepperCalled(event) {
  this.selectedStepper = event.selectedIndex
}

<div class="Rtable-cell--heading">Add/Edit</div>
<div class="Rtable-cell--content date-content" *ngIf="showEdit == false && showOpenEdit == false">
  <button nbButton *ngIf="addDegree" (click)="open(1)">Add</button>
  <button nbButton *ngIf="editDegree" (click)="open(1)">Edit</button>
</div>

onFourthSubmit(){
  console.log(this.fourthForm.valid);
  var error = this.findInvalidControls();
  // console.log(JSON.stringify(error))
  if(this.fourthForm.valid){

    this.stepper.next();
    }
}

open(EducationalDialogNo) {
  // SSC/CBSC dialogs validation commented as ssc not required
  if (EducationalDialogNo == 1) {
      console.log("EducationalDialogNo == 1");
      this.dialogService.open(FirstDialogComponent).onClose.subscribe((data: any) => {
          if (data !== undefined) {
              this.cbse.university = data.sscUniversity;
              this.cbse.school_name = data.sscCollege;
              this.cbse.result_date = data.sscResultDate;
              this.cbse.school_marks = data.sscMarks;
          }
          // this.stepper.stop();
          err => console.error(err)
      });
  } else if (EducationalDialogNo == 2) {
             //Code yrr
  }
 }

标签： javascriptangulartypescript

解决方案

如何停用HostListener？抱歉，我不知道，甚至不确定这是否可行，因为在撰写本文时，这是一个功能请求

但解决方法可能是：

  1. 创建一个变量（如果这些方法不在同一个组件中，请在服务中创建它）。
  2. 控制，当 keydown 被触发时，如果你打开了一个对话框
  3. 如果是，什么也不做
isDialogOpen = false

@HostListener('document:keydown', ['$event'])
handleKeyboardEvent(event: KeyboardEvent) {
  if(this.isDialogOpen) return
  // Your code
}

open(EducationalDialogNo) {
  // SSC/CBSC dialogs validation commented as ssc not required
  if (EducationalDialogNo == 1) {
    this.isDialogOpen = true
    console.log('EducationalDialogNo == 1')
    this.dialogService.open(FirstDialogComponent).onClose.subscribe((data: any) => {
      this.isDialogOpen = false
      if (data !== undefined) {
        this.cbse.university = data.sscUniversity
        this.cbse.school_name = data.sscCollege
        this.cbse.result_date = data.sscResultDate
        this.cbse.school_marks = data.sscMarks
      }
      // this.stepper.stop();
      ;(err) => console.error(err)
    })
  } else if (EducationalDialogNo == 2) {
    //Code yrr
  }
}

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