MFC Combobox in visual studio 2022

[pdk5]

Hello,

Im using visual studio 2022 installed in my project.

I have a combobox, which needs to display negetive floats. ( Internally it is owl combobox, TComboBox )

Eventhough the string i add is lets say "-6" , but is displaying, "6-" .. Could experts please help with this ?

Thanks
Pri

[VictorN]

What is "owl combobox"?
What is "TComboBox"?
Could you show how you add the values in this "TComboBox"?

[pdk5]

Thankyou very much Victor for the reply and help.

some gui in our tool is implemented with owl (which is very old )..

Btw

			// PA-Calculate combo
			m_pPACombo->ClearList();
			const IntToStringMap& crMap					= pHelper->GetPAKeyToStringMap();
			for (IntToStringMap::const_iterator citer	= crMap.begin(); citer != crMap.end(); ++citer)
			{
				const int cnIndex = m_pPACombo->AddString(citer->second.c_str());
				if (cnIndex >= 0)
				{
					m_pPACombo->SetItemData(cnIndex, (LPARAM)(citer->first));
					if (dCurrCarrierPA == cnIndex)
						nSelIndex = cnIndex;
				}
			}
			m_pPACombo->SetSelIndex(nSelIndex);

where the values are taken from the follwing PA_NAMES[], which is part of map

			const char*		PA_NAMES[]		= { "-6.00",			"-4.77",         "-3.00",        "-1.77",   "0",    "1" ,  "2",  "3", NULL };
const double	PA_VALUES[]		= { PA_VAL_Neg_6_00dB, PA_VAL_Neg_4_77dB, PA_VAL_Neg_3_00dB, PA_VAL_Neg_1_77dB, PA_VAL_0dB, PA_VAL_1dB, PA_VAL_2dB, PA_VAL_3dB, -10 };
const int		PA_INDEXES[]	= { PA_INDEX_Neg_6_00dB, PA_INDEX_Neg_4_77dB, PA_INDEX_Neg_3_00dB, PA_INDEX_Neg_1_77dB, PA_INDEX_0dB, PA_INDEX_1dB, PA_INDEX_2dB, PA_INDEX_3dB, -1};

[VictorN]

		
				const int cnIndex = m_pPACombo->AddString(citer->second.c_str());

Did you debug your code?
What values does the debugger show you for citer->second

[2kaud]

What is "owl combobox"?

owl is Borland's Object Window Library - which was deprecated in 1997 for Visual Component Library (VCL)

[VictorN]

Thank you for info!

I always thought that I'm the "one and only" such a "retrograde" to still use the obsolete means. For instance I used VC++6.0 and DAO until 2009. Only in 2009 I moved to VS2010 and ADO!
But there are some other persons that still use more obsolete and deprecated means! LOL!

[pdk5]

@kaud : thankyou very much for explaining.

@Victor: Our product has lot of legacy code. When the code base is huge, it becomes very difficult to move all the modules to upgrade. People just leave the old functionality and leave them. Only new features added will be using the new framework. It is because, it becomes a massive effort to upgrade all.

[2kaud]

it becomes a massive effort to upgrade all

Yes. But when does the effort needed to maintain/update existing old software outweigh the cost of re-implementation using a modern platform? If the required changes are 'trivial' then it probably doesn't make commercial sense to re-implement. But for more substantial/on-going changes then it might.

[pdk5]

@kaud: I understand. But I myself is rather beginner level in Windows OS stuff . So cant comment on on why they have not done, .
But at this point, my objective is to make the combobox work for my requirement ? It will be great help, if any pointers on this ...

[2kaud]

Sorry, but my knowledge of OWL got corrupted a long time ago.

However, in Region & Language settings you can specify whether a negative number is displayed as -n or n-. Have you checked this setting?

[VictorN]

@kaud: I understand. But I myself is rather beginner level in Windows OS stuff . So cant comment on on why they have not done, .
But at this point, my objective is to make the combobox work for my requirement ? It will be great help, if any pointers on this ...

You haven't answered my questions yet. Why?

[pdk5]

@Victor: Very sorry for the delay. Yes, I did check the string value in the debugger

			for (IntToStringMap::const_iterator citer	= crMap.begin(); citer != crMap.end(); ++citer)
			{
				std::string sPa = citer->second;

It is displaying first value of sPa as "-6.02" in the debugger !!!!

[2kaud]

...and the region/language settings?

[pdk5]

@kaud : Thankyou so much for willingness to help even with my basic qs

@Victor: Thankyou too for your willingness to help too

temp.png

[2kaud]

What's the style used with the TComboBox when it is created? Is it owner draw?