Kotlin - How to create a class member function similar to TextView.setText(String) that can be invoked as...












1















What i am trying to create is a Custom AlertDialogBox for which i would like to invoke the "setTitle()" method as alertObject.title = "SomeTitle". My current AlertDialog code is as below



class AlertBox(context: Context) : BaseDialogHelper() {

override val dialogView: View by lazy {
LayoutInflater.from(context).inflate(R.layout.custom_dialog, null)
}

override val builder: AlertDialog.Builder = AlertDialog.Builder(context).setView(dialogView)

val txt_title: TextView by lazy {
dialogView.findViewById<TextView>(R.id.txt_title)
}

val txt_message: TextView by lazy {
dialogView.findViewById<TextView>(R.id.txt_message)
}

val btn_ok: Button by lazy {
dialogView.findViewById<Button>(R.id.btn_done)
}

val btn_cancel: Button by lazy {
dialogView.findViewById<Button>(R.id.btn_cancel)
}

//These are the methods that i want to change
fun setTitle(title: String) {
txt_title.text = title
}

fun setMessage(message: String) {
txt_message.text = message
}


fun onOkButtonClickListener(func: (() -> Unit)? = null) = with(btn_ok) {
setClickListenerToButton(func)
}

fun onCancelButtonClickListener(func: (() -> Unit)? = null) = with(btn_cancel) {
setClickListenerToButton(func)
}


private fun View.setClickListenerToButton(func: (() -> Unit)?) = setOnClickListener {
func?.invoke()
dialog?.dismiss()
}


}


I would like create a class member function similar to TextView.setText(String) that can be invoked as TextView.text = "". Can this be done for custom classes...?










share|improve this question



























    1















    What i am trying to create is a Custom AlertDialogBox for which i would like to invoke the "setTitle()" method as alertObject.title = "SomeTitle". My current AlertDialog code is as below



    class AlertBox(context: Context) : BaseDialogHelper() {

    override val dialogView: View by lazy {
    LayoutInflater.from(context).inflate(R.layout.custom_dialog, null)
    }

    override val builder: AlertDialog.Builder = AlertDialog.Builder(context).setView(dialogView)

    val txt_title: TextView by lazy {
    dialogView.findViewById<TextView>(R.id.txt_title)
    }

    val txt_message: TextView by lazy {
    dialogView.findViewById<TextView>(R.id.txt_message)
    }

    val btn_ok: Button by lazy {
    dialogView.findViewById<Button>(R.id.btn_done)
    }

    val btn_cancel: Button by lazy {
    dialogView.findViewById<Button>(R.id.btn_cancel)
    }

    //These are the methods that i want to change
    fun setTitle(title: String) {
    txt_title.text = title
    }

    fun setMessage(message: String) {
    txt_message.text = message
    }


    fun onOkButtonClickListener(func: (() -> Unit)? = null) = with(btn_ok) {
    setClickListenerToButton(func)
    }

    fun onCancelButtonClickListener(func: (() -> Unit)? = null) = with(btn_cancel) {
    setClickListenerToButton(func)
    }


    private fun View.setClickListenerToButton(func: (() -> Unit)?) = setOnClickListener {
    func?.invoke()
    dialog?.dismiss()
    }


    }


    I would like create a class member function similar to TextView.setText(String) that can be invoked as TextView.text = "". Can this be done for custom classes...?










    share|improve this question

























      1












      1








      1








      What i am trying to create is a Custom AlertDialogBox for which i would like to invoke the "setTitle()" method as alertObject.title = "SomeTitle". My current AlertDialog code is as below



      class AlertBox(context: Context) : BaseDialogHelper() {

      override val dialogView: View by lazy {
      LayoutInflater.from(context).inflate(R.layout.custom_dialog, null)
      }

      override val builder: AlertDialog.Builder = AlertDialog.Builder(context).setView(dialogView)

      val txt_title: TextView by lazy {
      dialogView.findViewById<TextView>(R.id.txt_title)
      }

      val txt_message: TextView by lazy {
      dialogView.findViewById<TextView>(R.id.txt_message)
      }

      val btn_ok: Button by lazy {
      dialogView.findViewById<Button>(R.id.btn_done)
      }

      val btn_cancel: Button by lazy {
      dialogView.findViewById<Button>(R.id.btn_cancel)
      }

      //These are the methods that i want to change
      fun setTitle(title: String) {
      txt_title.text = title
      }

      fun setMessage(message: String) {
      txt_message.text = message
      }


      fun onOkButtonClickListener(func: (() -> Unit)? = null) = with(btn_ok) {
      setClickListenerToButton(func)
      }

      fun onCancelButtonClickListener(func: (() -> Unit)? = null) = with(btn_cancel) {
      setClickListenerToButton(func)
      }


      private fun View.setClickListenerToButton(func: (() -> Unit)?) = setOnClickListener {
      func?.invoke()
      dialog?.dismiss()
      }


      }


      I would like create a class member function similar to TextView.setText(String) that can be invoked as TextView.text = "". Can this be done for custom classes...?










      share|improve this question














      What i am trying to create is a Custom AlertDialogBox for which i would like to invoke the "setTitle()" method as alertObject.title = "SomeTitle". My current AlertDialog code is as below



      class AlertBox(context: Context) : BaseDialogHelper() {

      override val dialogView: View by lazy {
      LayoutInflater.from(context).inflate(R.layout.custom_dialog, null)
      }

      override val builder: AlertDialog.Builder = AlertDialog.Builder(context).setView(dialogView)

      val txt_title: TextView by lazy {
      dialogView.findViewById<TextView>(R.id.txt_title)
      }

      val txt_message: TextView by lazy {
      dialogView.findViewById<TextView>(R.id.txt_message)
      }

      val btn_ok: Button by lazy {
      dialogView.findViewById<Button>(R.id.btn_done)
      }

      val btn_cancel: Button by lazy {
      dialogView.findViewById<Button>(R.id.btn_cancel)
      }

      //These are the methods that i want to change
      fun setTitle(title: String) {
      txt_title.text = title
      }

      fun setMessage(message: String) {
      txt_message.text = message
      }


      fun onOkButtonClickListener(func: (() -> Unit)? = null) = with(btn_ok) {
      setClickListenerToButton(func)
      }

      fun onCancelButtonClickListener(func: (() -> Unit)? = null) = with(btn_cancel) {
      setClickListenerToButton(func)
      }


      private fun View.setClickListenerToButton(func: (() -> Unit)?) = setOnClickListener {
      func?.invoke()
      dialog?.dismiss()
      }


      }


      I would like create a class member function similar to TextView.setText(String) that can be invoked as TextView.text = "". Can this be done for custom classes...?







      android kotlin






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      asked Nov 20 '18 at 6:48









      Akhil SomanAkhil Soman

      1,032616




      1,032616
























          1 Answer
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          You need to define a property:



          var text: String
          get() = txt_title.text
          set(value) { txt_title.text = value }





          share|improve this answer























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            1 Answer
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            1 Answer
            1






            active

            oldest

            votes









            active

            oldest

            votes






            active

            oldest

            votes









            2














            You need to define a property:



            var text: String
            get() = txt_title.text
            set(value) { txt_title.text = value }





            share|improve this answer




























              2














              You need to define a property:



              var text: String
              get() = txt_title.text
              set(value) { txt_title.text = value }





              share|improve this answer


























                2












                2








                2







                You need to define a property:



                var text: String
                get() = txt_title.text
                set(value) { txt_title.text = value }





                share|improve this answer













                You need to define a property:



                var text: String
                get() = txt_title.text
                set(value) { txt_title.text = value }






                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered Nov 20 '18 at 6:51









                yoleyole

                60.3k11150143




                60.3k11150143
































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