TGMsgBox Modal and Modaless

[aortiz]

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_ROOT Version:28.00b
_Platform:Windows
_Compiler:VS2008

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I’m supporting an existing application that uses root v28.00b. In some calls to new TGMsgBox() creates a modal dialog, while other calls create a modaless dialog.

I can’t figure out what causes the modal and/or the modaless TGMsgBox creation.

How can you specify the Modal property when calling new TGMsgBox()?

How can you specify the Dialog should not have the minimize/maximize/Close button when calling new TGMsgBox()?

Thank you,
Angel

[oshadura]

@bellenot can you help here please?

[bellenot]

Hi,

@aortiz

In some calls to new TGMsgBox() creates a modal dialog, while other calls create a modaless dialog.

A TGMsgBox should always be modal… In which condition do you see modeless dialog?

@aortiz

How can you specify the Dialog should not have the minimize/maximize/Close button when calling new TGMsgBox()?

Usually by using TGMainFrame::SetMWMHints(), but AFAIK, you can’t customize a TGMsgBox

Cheers, Bertrand.

[aortiz]

Bertrand,

Thank you for the response. Very interesting behavior with TGMsgBox().

On the following call, the TGMsgBox() is modaless. I know, because I put a breakpoint on the line, when I hit it, I press next line and I can continue to multiple lines below the call. I have to press continue to get the dialog box to display. At this point, I’m out of the function that makes the below call.

TGMsgBox *pTGmsgBox = new TGMsgBox(gClient->GetRoot(), MainFrame->pMainFrame, GENESIS_NAME2, tStr1.Data(), kMBIconAsterisk, kMBOk | kMBCancel | kMBDelaySweepF, &iRetCode);

On other instances, the moment I press next line in my debugger, the tgmsgbox is displayed and control is back to the application. At this point I have a Modal dialog.

At this point – knowing TGMsgBox should be modal – I look deeper into what the prior developer did in TGMsgBox(). He may have hacked it up.

What would you recommend for displaying a message dialog and having the option to specify?

1. Modal/Modaless

2. Display/Not displaying the minimize/maximize/close “X” buttons on top right of dialog

Regards,

Angel

[bellenot]

@aortiz

On the following call, the TGMsgBox() is modaless. I know, because I put a breakpoint on the line, when I hit it, I press next line and I can continue to multiple lines below the call. I have to press continue to get the dialog box to display. At this point, I’m out of the function that makes the below call.

TGMsgBox *pTGmsgBox = new TGMsgBox(gClient->GetRoot(), MainFrame->pMainFrame, GENESIS_NAME2, tStr1.Data(), kMBIconAsterisk, kMBOk | kMBCancel | kMBDelaySweepF, &iRetCode);

Then how is iRetCode getting its value?

@aortiz

What would you recommend for displaying a message dialog and having the option to specify?

1. Modal/Modaless

2. Display/Not displaying the minimize/maximize/close “X” buttons on top right of dialog

Implement your own version (possibly inheriting from TGMsgBox)…

[bellenot]

BTW, the kMBDelaySweepF flag is not coming from ROOT, this is most probably the answer you’re looking for…

[aortiz]

You are correct!

Currently reviewing the modified TGMsgBox(). Horrible! Should have created a derived class.