Image processing error

[wysota]

Seems like BrightnessContrast instance is an invalid pointer.

[bachkimfly]

I import mainwindow into BrightnessContrast and declare:

MainWindow respond;
respond.brightnessProcessing(value);

MainWindow respond;
respond.brightnessProcessing(value);

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This right?

[bachkimfly]

I posted backtrace wrong, I editted in #7

[wysota]

Could you explain why you did the thing Chris pointed out a couple of posts ago -- made MainWindow a member variable of a QDialog subclass?

[bachkimfly]

Can you give me a few link? I not yet reat it.
------------------------------------

I'm trying "made MainWindow a member variable of a QDialog subclass"

[wysota]

I'm trying "made MainWindow a member variable of a QDialog subclass"

Yes, we can see that. But why are you trying to do this?

[bachkimfly]

If don't made MainWindow a member variable of a QDialog, how to can executable event in QDialog. So what is your idea?

[wysota]

If don't made MainWindow a member variable of a QDialog, how to can executable event in QDialog.

I don't understand what you mean.

[bachkimfly]

I want to catch event slider value changed, but brightness processing function which at MainWindow, if don't made MainWindow as a member variable of a BrightnessContrast dialog, i dont know to executable event slider value changed. your idea!

P/s: now, it's 5:22 AM, a tonight don't sleep, i want to go to sleep

[wysota]

I want to catch event slider value changed, but brightness processing function which at MainWindow, if don't made MainWindow as a member variable of a BrightnessContrast dialog, i dont know to executable event slider value changed. your idea!

Don't you already have an instance of the main window which launched the dialog? Do you understand the difference between a class and an instance of a class?

[bachkimfly]

Alright! I need have to initialize object of MainWindow class, right?. I asked in #9.
So what is I can understand for "made MainWindow a member variable of a QDialog subclass". Patently, I misconstrued.

[wysota]

Alright! I need have to initialize object of MainWindow class, right?

No, I'm assuming you already have such an object somewhere.

Let's make a deal - if you keep ignoring my questions, I will start ignoring yours.

[bachkimfly]

No, I'm assuming you already have such an object somewhere.

Let's make a deal - if you keep ignoring my questions, I will start ignoring yours.

I don't ignore, I answered by the question "I need have to initialize object of MainWindow class, right?". That means I don't have an instance of the main window which launched the dialog and I understand the difference between a class and an instance of a class. I think so.

But I feel we are going around.