U++ forum: Welcome to the forum

Search on this site

Search in forums

Home » U++ Library support » TabCtrl » trouble with tabs ((identifying selected tab))

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

trouble with tabs [message #52444]

Wed, 02 October 2019 02:15

mtdew3q
Messages: 181
Registered: July 2010
Location: Upstate, NY (near Canada)

Experienced Member

HI all-

I am very puzzled. i want code to activate on tab WhenSet, and then to identify which tab is the current tab.

Am I doing something wrong?

        tab1.Add(eventGrid.SizePos(), t_("Events"));
	tab1.Add(dateGrid.SizePos(), t_("Dates"));
	tab1.Add(sqlArr.SizePos(), t_("Tasks"));

tab1.WhenSet = THISBACK(ManageMenus);

void CantonEdu::ManageMenus() {
// TabCtrl::Item & tabItemZero = tab1.GetItem(0);

  	int n3 = tab1.Get();
  	bool n2 = tab1.IsAt(eventGrid);

	// PromptOK( "" + n3);
	// PromptOK( "" + n2);
	//n3 and n2 do not return anything (blank dialog msg window).
	// cant use tabItemZero because I can't pass in an int like n3 to GetItem;
        
        // NOTE this function doesn't really do anything (yet). It is a mishmash of pseudo code.
        // I used examples of Get and IsAt to communicate that the PromptOk dialog window returns nothing.
	
}

I will check back in about 14 hours. I am at GMT -5.

thnx.
roboloki

[Updated on: Wed, 02 October 2019 05:04]

Report message to a moderator

Re: trouble with tabs [message #52447 is a reply to message #52444]

Wed, 02 October 2019 08:52

koldo
Messages: 3432
Registered: August 2008

Senior Veteran

This works for me:

	tab.Add(menuOpen.SizePos(),    "Open");
	tab.Add(menuConvert.SizePos(), "Convert");

	tab.WhenSet = [&] {
		PromptOK("Selected tab " + FormatInt(tab.Get()));
		if (tab.IsAt(menuOpen)) 
			PromptOK("At Open");
		else if (tab.IsAt(menuConvert)) 
			PromptOK("At Convert");
	};

You can even get direct access to the tabs, in this case, to disable it:

TabCtrl::Item& tabOpen = tab.GetItem(tab.Find(menuOpen));
tabOpen.Enable(false);

Best regards
Iñaki

Report message to a moderator

Re: trouble with tabs [message #52452 is a reply to message #52447]

Wed, 02 October 2019 13:32

mtdew3q
Messages: 181
Registered: July 2010
Location: Upstate, NY (near Canada)

Experienced Member

HI -

It is a scoping issue. I will figure it out after work. I see that your event handler scope worked.

thanks for the cool tip,
roboloki

Report message to a moderator

Re: trouble with tabs [message #52461 is a reply to message #52452]

Thu, 03 October 2019 02:49

mtdew3q
Messages: 181
Registered: July 2010
Location: Upstate, NY (near Canada)

Experienced Member

Hi Koldo-

I checked out function references, and I can't get them in the same scope as the GUI.

Is there an easy way with a function reference or lamda event handler to pass in a parameter that is the same scope as the GUI?

I only have scope on the lamda for the tab. People might like multiple parameters in the same scope with their controls in the layout.

I know that is asking a lot, and if you are busy I understand.

I can always use a different way to solve the problem.

I bet some other people are wondering how to use multiple parameters from a GUI in a thisback or lamda thisback too.

thanks,
roboloki

Report message to a moderator

Re: trouble with tabs [message #52462 is a reply to message #52461]

Thu, 03 October 2019 08:12

koldo
Messages: 3432
Registered: August 2008

Senior Veteran

Hello Roboloki

I am sorry, I do not understand you well. Could you explain it even simpler, with a tiny sample?
You can always pass arguments to a callback (remember THISBACK1, THISBACK2, ...) or to a lambda.

Best regards
Iñaki

Report message to a moderator

Re: trouble with tabs [message #52470 is a reply to message #52462]

Fri, 04 October 2019 00:04

mtdew3q
Messages: 181
Registered: July 2010
Location: Upstate, NY (near Canada)

Experienced Member

Hi Koldo-

I outlined 2 examples to illustrate my confusion.

I hope you can now see what I am doing wrong.

Example 1:

 int func(int a) {
   // cout << "Hello" << a << '\n';
   return 2;
}

  struct CantonEdu : public WithRooLayout<TopWindow> {
	 WithQueryLayout<TopWindow> query;

class functions..
class members...



void CantonEdu::ManageMenus(int n);
Button b1;
TabCtrl tab1 // defined in layout
int func(int a);

typedef CantonEdu CLASSNAME;
 };

 
    int (& r_ref)(int) = func;
Add ( b1.LeftPos ( 10, 100 ).BottomPos ( 10, 30 ) );
	b1.SetLabel ( "Click me!" );
	b1 <<= THISBACK ( r_ref, 1 ) ; /** thisback and r_ref not agreeing in this scope (GUI)  **/

b1 and r_ref not in same scope.

Example 2:

 tab1.WhenSet = [&]  {
    
	    int n = tab1.Get();  // compiles
	    ManageMenus(n);  // compiles
	 
		};

void CantonEdu::ManageMenus(int n) {
PromptOK( " " + n): // (blank PromptOk - empty value)
}

n does not equal index of recently clicked tab

I'd like to be able thisback to call function with these parameters as well: void ManageMenus (TabCTRL tab1, MenuBar menu).
tab1.WhenSet =THISBACK(ManageMenus,tab1, menu);

NOTE: I mean to indicate a function reference that points to function like:

void func (CtrlTab tab, MenuBar menu) ;

void (& func_ref)(CtrlTab, MenuBar) = func;
tab1.WhenSet = THISBACK(func_ref, tab1, menu);

I hope that is a little more clear.

I don't know if these examples are easy to follow and/or easy to implement.

Thnx for any assistance.
roboloki

[Updated on: Fri, 04 October 2019 12:00] by Moderator

Report message to a moderator

Re: trouble with tabs [message #52480 is a reply to message #52444]

Sun, 06 October 2019 18:06

mtdew3q
Messages: 181
Registered: July 2010
Location: Upstate, NY (near Canada)

Experienced Member

Hi Koldo-

I got knocked out of U++ this past couple of days by busy moments at work and elsewhere.

I had some time today to look at my code and got it working.

I wanted a system where the menus changed based on which tab is selected.

Here is the code for that.

Thanks so much for replying last time, and sorry for being confused.

Below is the code that is now working. THNX !

 #include <CtrlLib/CtrlLib.h>
#include "cookie.h"


void Blam::Setup ()
{


	CtrlLayout ( *this, String ( "Blam" ) + " 1.0" );

	tab.Add ( a1.SizePos(), "a1" );
	tab.Add ( a2.SizePos(), "a2" );

	AddFrame ( menu ).LeftPosZ ( 0, 304 ).TopPosZ ( 0, 15 );;

	menu.Set ( THISBACK ( MainMenu1 ) );


	tab.WhenSet = [&]
	{
		PromptOK ( "Selected tab " + FormatInt ( tab.Get() ) );

		if ( tab.IsAt ( a1 ) )
		{
			menu1.Clear();
			PromptOK ( "At a1" );
			menu.Set ( THISBACK ( MainMenu1 ) );

		}

		else
			if ( tab.IsAt ( a2 ) )
			{
				PromptOK ( "At a2" );
				menu.Clear();
				menu.Set ( THISBACK ( MainMenu2 ) );

			}


	};


}



void Blam::MainMenu1 ( Bar& bar )
{

	bar.Sub ( "cookie 1", [=] ( Bar & bar )
	{
		bar.Add ( "eat cookie 1", THISBACK ( func1 ) );

	}

			);

}

void Blam::MainMenu2 ( Bar& bar )
{

	bar.Sub ( "cookie 2", [=] ( Bar & bar )
	{
		bar.Add ( "eat cookie 2", THISBACK ( func2 ) );

	}

			);

}




GUI_APP_MAIN
{
	Blam b;
	b.Setup();
	b.Run();


}

Report message to a moderator

Re: trouble with tabs [message #52483 is a reply to message #52480]

Mon, 07 October 2019 08:31

koldo
Messages: 3432
Registered: August 2008

Senior Veteran

Hello Roboloki

Yes, I would do it your way.
In addition, it is possible to join the menu functions in one. For example:

	tab.WhenSet = [&] {
		PromptOK("Selected tab " + FormatInt(tab.Get()));

		if (tab.IsAt(a1)) {
			PromptOK("At a1");
			menu.Set(THISBACK1(MainMenu, 1));
		} else if (tab.IsAt(a2)) {
			PromptOK("At a2");
			menu.Set(THISBACK1(MainMenu, 2));
		}
	};

...		

void Blam::MainMenu(Bar& bar, int num) {
	bar.Sub(Format(t_("Cookie %d"), num), [=](Bar & bar, int num) {
		bar.Add(Format(t_("Eat cookie %d"), num), THISBACK1(func, num));
	});
}

Best regards
Iñaki

[Updated on: Mon, 07 October 2019 08:31]

Report message to a moderator

Previous Topic:	Background color of layout
Next Topic:	How do I change TabCtrl tab size

Goto Forum:

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Sat Apr 26 14:27:13 CEST 2025

Total time taken to generate the page: 0.02653 seconds