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Problem. How to convert AttrText to String? [message #27846]

Fri, 06 August 2010 11:47

kov_serg
Messages: 42
Registered: August 2008
Location: Russia

Member

Value v=AttrText("text");
String s=v; // ups - invalid conversion RawValueRep<AttrText> -> String

Is something missed?

It happens when I try to insert Values into WithDropChoice<EditString> with Monospace font.

  ...
  list.AddList(AttrText("option 1").SetFont(Monospace()));
  list.AddList(AttrText("option 2").SetFont(Monospace()));
  ...

But when I select string from drop down list I have empty string as a result Shocked

ps: Upp2467

[Updated on: Fri, 06 August 2010 11:53]

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Re: Problem. How to convert AttrText to String? [message #27848 is a reply to message #27846]

Fri, 06 August 2010 12:44

zsolt
Messages: 702
Registered: December 2005
Location: Budapest, Hungary

Contributor

String s;
if(IsType<AttrText>(v)){
	const AttrText& at = ValueTo<AttrText>(v);
	s = at.text.ToString();
}

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Re: Problem. How to convert AttrText to String? [message #27859 is a reply to message #27848]

Sat, 07 August 2010 01:06

kov_serg
Messages: 42
Registered: August 2008
Location: Russia

Member

Try this out:

#include <CtrlLib/CtrlLib.h>
using namespace Upp;

struct Example : TopWindow {
	typedef Example CLASSNAME;
	WithDropChoice<EditString> item;
	Example() {
		SetRect(0,0,200,32);Title("Feel the difference");
		item.AddList(AttrText("one").SetFont(Monospace()));
		item.AddList(AttrText("two").SetFont(Monospace()));
		item.AddList(AttrText("three").SetFont(Monospace()));
		item.AddList("1");
		item.AddList("2");
		item.AddList("3");
		item.SetText("zero");
		item.HSizePosZ(8, 8).TopPosZ(8, 19);
		Add(item);
	}
};

GUI_APP_MAIN {
	Example().Run();
}

The question is what should I write to force this work?

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Re: Problem. How to convert AttrText to String? [message #27867 is a reply to message #27859]

Sat, 07 August 2010 23:33

zsolt
Messages: 702
Registered: December 2005
Location: Budapest, Hungary

Contributor

I think you have to create a new Convert class, knowing about AttrText.

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Re: Problem. How to convert AttrText to String? [message #27900 is a reply to message #27846]

Tue, 10 August 2010 08:24

kov_serg
Messages: 42
Registered: August 2008
Location: Russia

Member

Why there is no such class?
Could anybody show how to write ValueRep or how to do Value convertor or any example or hint

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Re: Problem. How to convert AttrText to String? [message #27909 is a reply to message #27900]

Tue, 10 August 2010 15:35

zsolt
Messages: 702
Registered: December 2005
Location: Budapest, Hungary

Contributor

Ok, you have to override EditString::SetData method:

#include <CtrlLib/CtrlLib.h>
using namespace Upp;

class MyEditString : public EditString {
public:
	virtual void SetData(const Value& data){
		if(IsType<AttrText>(data)){
			EditString::SetData(ValueTo<AttrText>(data).text.ToString());
		}else{
			EditString::SetData(data);
		}
	}
};

struct Example : TopWindow {
	typedef Example CLASSNAME;
	WithDropChoice<MyEditString> item;
	Example() {
		item.SetDisplay(StdDisplay());
		SetRect(0,0,200,32);Title("Feel the difference");
		item.AddList(AttrText("one").SetFont(Monospace()));
		item.AddList(AttrText("two").SetFont(Monospace()));
		item.AddList(AttrText("three").SetFont(Monospace()));
		item.AddList("1");
		item.AddList("2");
		item.AddList("3");
		item.SetText("zero");
		item.HSizePosZ(8, 8).TopPosZ(8, 19);
		Add(item);
	}
};


GUI_APP_MAIN
{
	Example().Run();
}

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Re: Problem. How to convert AttrText to String? [message #28018 is a reply to message #27846]

Fri, 13 August 2010 11:00

mirek
Messages: 14291
Registered: November 2005

Ultimate Member

kov_serg wrote on Fri, 06 August 2010 05:47

Value v=AttrText("text");
String s=v; // ups - invalid conversion RawValueRep<AttrText> -> String

Is something missed?

It happens when I try to insert Values into WithDropChoice<EditString> with Monospace font.

  ...
  list.AddList(AttrText("option 1").SetFont(Monospace()));
  list.AddList(AttrText("option 2").SetFont(Monospace()));
  ...

But when I select string from drop down list I have empty string as a result Shocked

ps: Upp2467

AttrText was concieved as simple means to put something more formatted to StdDisplay (and thus to everything that is using StdDisplay as default). No further use of such value was expected...

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Re: Problem. How to convert AttrText to String? [message #28171 is a reply to message #28018]

Fri, 20 August 2010 09:43

kov_serg
Messages: 42
Registered: August 2008
Location: Russia

Member

I understand.

But the question is how to do combobox with drop down items that have same Monotype font.

What is the simplest solutiong for this problem?

Write my own Display class or write my own WithDropChoice2 or MyEditString with overrided SetData or something different?

[Updated on: Fri, 20 August 2010 09:45]

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