dwt.widget.Text has method

void setText  (char[] string);
Sets the contents of the receiver to the given string.

In my application I use many of these text boxes each with a name so I need a function

void setText(char[] name, char[] text){
   name.setText(text);}

How can  I bring this into my program ?

June escribió:
> dwt.widget.Text has method
>  void setText  (char[] string); Sets the contents of the receiver to the given string.
> 
> In my application I use many of these text boxes each with a name so I need a function 
> 
> void setText(char[] name, char[] text){
>    name.setText(text);}

name.setText(text) ?

But name is of type char[]

> 
> How can  I bring this into my program ?

Maybe you could show what you do now, and how you would like to have it if you were able to do what you want. I don't understand what you are trying to do. :(

Ary Borenszweig Wrote:

> June escribió:
> > dwt.widget.Text has method
> > 
> > void setText  (char[] string);
> > Sets the contents of the receiver to the given string.
> > 
> > In my application I use many of these text boxes each with a name so I need a function
> > 
> > void setText(char[] name, char[] text){
> >    name.setText(text);}
> 
> name.setText(text) ?
> 
> But name is of type char[]
> 
> > 
> > How can  I bring this into my program ?
> 
> Maybe you could show what you do now, and how you would like to have it if you were able to do what you want. I don't understand what you are trying to do. :(


In a class 'Room'
I make a text box called  "speaker', and another called 'radio' etc
Text speaker = new Text;

all blank atm

In another module  'town' I create instance of 'room' and
now I want to set the text in each
speaker.setText("Wallplate");
radio.setText("Valves")

So Text class has  method  'setText(char[])

In 'town' I want to make another method like setText(name[],text[]);

different parameters to setText () in Text- I need to find out how to do it please?

June schrieb:
> Ary Borenszweig Wrote:
> 
>> June escribió:
>>> dwt.widget.Text has method
>>>  void setText  (char[] string); Sets the contents of the receiver to the given string.
>>>
>>> In my application I use many of these text boxes each with a name so I need a function 
>>>
>>> void setText(char[] name, char[] text){
>>>    name.setText(text);}
>> name.setText(text) ?
>>
>> But name is of type char[]
>>
>>> How can  I bring this into my program ?
>> Maybe you could show what you do now, and how you would like to have it if you were able to do what you want. I don't understand what you are trying to do. :(
> 
> 
> In a class 'Room'
> I make a text box called  "speaker', and another called 'radio' etc
> Text speaker = new Text;
> 
> all blank atm
> 
> In another module  'town' I create instance of 'room' and now I want to set the text in each
> speaker.setText("Wallplate");
> radio.setText("Valves")
> 
> So Text class has  method  'setText(char[])
> 
> In 'town' I want to make another method like setText(name[],text[]);
> 
> different parameters to setText () in Text- I need to find out how to do it please?


Hi June,

class room
{
  void setText(char[] roomtext)
  {
   // print or whatever you wanna do with roomtext
  }
}

class town : room
{
 void setText(char[] roomtext, char[] towntext)
 {
  super.setText(roomtext); //  calls room.setText()
  // do something with towntext
 }
}

hth bjoern

June wrote:
> Ary Borenszweig Wrote:
> 
> 
>>June escribió:
>>
>>>dwt.widget.Text has method
>>> 
>>>void setText  (char[] string); Sets the contents of the receiver to the given string.
>>>
>>>In my application I use many of these text boxes each with a name so I need a function 
>>>
>>>void setText(char[] name, char[] text){
>>>   name.setText(text);}
>>
>>name.setText(text) ?
>>
>>But name is of type char[]
>>
>>
>>>How can  I bring this into my program ?
>>
>>Maybe you could show what you do now, and how you would like to have it if you were able to do what you want. I don't understand what you are trying to do. :(
> 
> 
> 
> In a class 'Room'
> I make a text box called  "speaker', and another called 'radio' etc
> Text speaker = new Text;
> 
> all blank atm
> 
> In another module  'town' I create instance of 'room' and now I want to set the text in each
> speaker.setText("Wallplate");
> radio.setText("Valves")
> 
> So Text class has  method  'setText(char[])
> 
> In 'town' I want to make another method like setText(name[],text[]);
> 
> different parameters to setText () in Text- I need to find out how to do it please?


so "setText("speaker", "foo") would call speaker.setText("foo")?

D doesn't support this directly, however you could do it manually

void setText(char[] name, char[] text)
{
	switch(name)
	{
		case "speaker": speaker.setText(text); break;
		case "radio":     radio.setText(text); break;
		default: assert(false);
	}
}

"BCS" <BCS@pathlink.com> wrote in message news:fvsdh5$2hii$11@digitalmars.com...

> so "setText("speaker", "foo") would call speaker.setText("foo")?
>
> D doesn't support this directly, however you could do it manually
>
> void setText(char[] name, char[] text)
> {
> switch(name)
> {
> case "speaker": speaker.setText(text); break;
> case "radio":     radio.setText(text); break;
> default: assert(false);
> }
> }

In this case, it seems like keeping the controls in an AA would make a lot more sense.

class MyWindow
{
    Control[char[]] controls;

    this()
    {
        controls["speaker"] = new Slider();
        controls["radio"] = new Button();
    }

    void setText(char[] name, char[] text)
    {
        controls[name].setText(text);
    }
}

Jarrett Billingsley Wrote:

> "BCS" <BCS@pathlink.com> wrote in message news:fvsdh5$2hii$11@digitalmars.com...
> 
> > so "setText("speaker", "foo") would call speaker.setText("foo")?

YES

> >
> > D doesn't support this directly, however you could do it manually
> >
> > void setText(char[] name, char[] text)
> > {
> > switch(name)
> > {
> > case "speaker": speaker.setText(text); break;  What is diff here? -none
> > case "radio":     radio.setText(text); break;
> > default: assert(false);
> > }
> > }
> 
> In this case, it seems like keeping the controls in an AA would make a lot more sense.
> 
> class MyWindow
> {
>     Control[char[]] controls;
> 
>     this()
>     {
>         controls["speaker"] = new Slider();
>         controls["radio"] = new Button();
>     }
> 
>     void setText(char[] name, char[] text)
>     {
>         controls[name].setText(text);
>     }
> }
> 
> 
Dont see how this applies .
I want to add a function to 'dwt.widgets.Text' that takes two char arrays and alters the text in  an instance of dwt.widgets.Text'

dwt.widgets.Text'  only has a function  that takes one char array ?   setText(char[] text)

Sorry if confusing a womans perogative no?

"June" <somewhere@so.com> wrote in message news:fvtbau$p5q$1@digitalmars.com...

> Dont see how this applies .
> I want to add a function to 'dwt.widgets.Text' that takes two char arrays
> and alters the text in  an instance of dwt.widgets.Text'
>
> dwt.widgets.Text'  only has a function  that takes one char array ? setText(char[] text)

It applies because it's exactly what you want to do ;)

You have several Text objects, yes?  And each one has a name?  You can't just "add a method" to Text and have it "find" a text box of a given name, you have to store those text boxes and perform the name lookup yourself. Remember that a class method only operates on a single object; if you subclassed Text, you wouldn't be able to access other instances of Text besides 'this' unless you stored them somewhere.

So instead of doing something like

class MyWindow
{
    Text foo;
    Text bar;

    this()
    {
        foo = new Text("hi!");
        bar = new Text("bye!");
    }
}

You can instead store them in an associative array which maps from names to text boxes:

class MyWindow
{
    Text[char[]] textBoxes;

    this()
    {
        textBoxes["foo"] = new Text("hi!");
        textBoxes["bar"] = new Text("bye!");
    }
}

Then, you can add a method to MyWindow that will take a name and a string, and will set the text box with the given name to the given string:

// defined as a method of MyWindow
void setText(char[] name, char[] s)
{
    textBoxes[name].setText(s);
}

Keep in mind that D is a statically-compiled language, unlike languages like Python, and so dynamic (runtime) lookup of variables and members is, in general, not possible.  Which is why you have to store the mapping from names to controls yourself.

>>>void setText(char[] name, char[] text)
>>>{
>>>switch(name)
>>>{
>>>case "speaker": speaker.setText(text); break;

>  What is diff here? -none

I don't understand your question.

>>>case "radio":     radio.setText(text); break;
>>>default: assert(false);
>>>}
>>>}

duplicating much of Jarrett's comments:

>>
>>In this case, it seems like keeping the controls in an AA would make a lot more sense.
>>
>>class MyWindow
>>{
>>    Control[char[]] controls;
>>
>>    this()
>>    {
>>        controls["speaker"] = new Slider();
>>        controls["radio"] = new Button();
>>    }
>>
>>    void setText(char[] name, char[] text)
>>    {
>>        controls[name].setText(text);
>>    }
>>} 
>>
>>
> 
> Dont see how this applies .

I think Jarrett is solving a more general problem that you are looking at. Replace 'Control', 'Slider' and 'Button' with 'Text' and it might be closer to what you want.

Independently:

> I want to add a function to 'dwt.widgets.Text' that takes two char
> arrays and alters the text in  an instance of dwt.widgets.Text'

Unless you are willing to alter the source code for 'dwt.widgets.Text' (and end up with a non-standard version) you can't add a function to 'dwt.widgets.Text'. The best you can do is derive a new class from it and add your function to that.

Also, I don't think adding the function to Text will work anyway because, If I understand you correctly, you want to call setText on different instances of Text based on 'name'. For this to work the setText(name,text) function needs to be attached to whatever holds the reference to the Text instance.

Jumping back to the case you described befor this requiters that the new function be attached to the Room class because it has the 'radio' and 'speaker' variables:

class Room
{
  Text speaker;
  Text radio;

  void setText(char[] name, char[] text)
  {
    switch(name)
    {
      case "speaker": speaker.setText(text); break;
      case "radio":     radio.setText(text); break;
      default: assert(false);
    }
  }

  ... // everything else
}

Jarrett Billingsley Wrote:

> "June" <somewhere@so.com> wrote in message news:fvtbau$p5q$1@digitalmars.com...
> 
> > Dont see how this applies .
> > I want to add a function to 'dwt.widgets.Text' that takes two char
arrays
> > and alters the text in  an instance of dwt.widgets.Text'
> >
> > dwt.widgets.Text'  only has a function  that takes one char
array ?
> > setText(char[] text)
> 
> It applies because it's exactly what you want to do ;)
> 
> You have several Text objects, yes?  And each one has a name?  You
can't
> just "add a method" to Text and have it "find" a text box of a given
name,
> you have to store those text boxes and perform the name lookup
yourself.
> Remember that a class method only operates on a single object; if
you
> subclassed Text, you wouldn't be able to access other instances of
Text
> besides 'this' unless you stored them somewhere.
> 
> So instead of doing something like
> 
> class MyWindow
> {
>     Text foo;
>     Text bar;
> 
>     this()
>     {
>         foo = new Text("hi!");
>         bar = new Text("bye!");
>     }
> }
> 
> You can instead store them in an associative array which maps from
names to
> text boxes:
> 
> class MyWindow
> {
>     Text[char[]] textBoxes;
> 
>     this()
>     {
>         textBoxes["foo"] = new Text("hi!");
>         textBoxes["bar"] = new Text("bye!");
>     }
> }
> 
> Then, you can add a method to MyWindow that will take a name and a
string,
> and will set the text box with the given name to the given string:
> 
> // defined as a method of MyWindow
> void setText(char[] name, char[] s)
> {
>     textBoxes[name].setText(s);
> }
> 
> Keep in mind that D is a statically-compiled language, unlike
languages like
> Python, and so dynamic (runtime) lookup of variables and members is,
in
> general, not possible.  Which is why you have to store the mapping
from
> names to controls yourself.
> 
> 
Completely lost now .
So much extraneous stuff

>>textBoxes["foo"] = new Text("hi!");  using 'dwt.widgets.Text' ,,this
expects a composite parent and an integer style so this does not work

I understand the need to  store the names point you are making but surely I can override the 'dwt.widgets.Text's '  setText(text) function some way?