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






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Nov 20 '18 at 6:48









      Akhil SomanAkhil Soman

      1,032616




      1,032616
























          1 Answer
          1






          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























            Your Answer






            StackExchange.ifUsing("editor", function () {
            StackExchange.using("externalEditor", function () {
            StackExchange.using("snippets", function () {
            StackExchange.snippets.init();
            });
            });
            }, "code-snippets");

            StackExchange.ready(function() {
            var channelOptions = {
            tags: "".split(" "),
            id: "1"
            };
            initTagRenderer("".split(" "), "".split(" "), channelOptions);

            StackExchange.using("externalEditor", function() {
            // Have to fire editor after snippets, if snippets enabled
            if (StackExchange.settings.snippets.snippetsEnabled) {
            StackExchange.using("snippets", function() {
            createEditor();
            });
            }
            else {
            createEditor();
            }
            });

            function createEditor() {
            StackExchange.prepareEditor({
            heartbeatType: 'answer',
            autoActivateHeartbeat: false,
            convertImagesToLinks: true,
            noModals: true,
            showLowRepImageUploadWarning: true,
            reputationToPostImages: 10,
            bindNavPrevention: true,
            postfix: "",
            imageUploader: {
            brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
            contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
            allowUrls: true
            },
            onDemand: true,
            discardSelector: ".discard-answer"
            ,immediatelyShowMarkdownHelp:true
            });


            }
            });














            draft saved

            draft discarded


















            StackExchange.ready(
            function () {
            StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53387642%2fkotlin-how-to-create-a-class-member-function-similar-to-textview-settextstrin%23new-answer', 'question_page');
            }
            );

            Post as a guest















            Required, but never shown

























            1 Answer
            1






            active

            oldest

            votes








            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
































                    draft saved

                    draft discarded




















































                    Thanks for contributing an answer to Stack Overflow!


                    • Please be sure to answer the question. Provide details and share your research!

                    But avoid



                    • Asking for help, clarification, or responding to other answers.

                    • Making statements based on opinion; back them up with references or personal experience.


                    To learn more, see our tips on writing great answers.




                    draft saved


                    draft discarded














                    StackExchange.ready(
                    function () {
                    StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53387642%2fkotlin-how-to-create-a-class-member-function-similar-to-textview-settextstrin%23new-answer', 'question_page');
                    }
                    );

                    Post as a guest















                    Required, but never shown





















































                    Required, but never shown














                    Required, but never shown












                    Required, but never shown







                    Required, but never shown

































                    Required, but never shown














                    Required, but never shown












                    Required, but never shown







                    Required, but never shown







                    這個網誌中的熱門文章

                    Tangent Lines Diagram Along Smooth Curve

                    Yusuf al-Mu'taman ibn Hud

                    Zucchini