Restore default text color in QTextEdit (with Qss style)

[leanderfr]

Hello,
I have some difficulty with a problem which seem simple (at beginning).
I created a console class (for logging) which inherits from QTextEdit. I have some Qt property for text color (one for each type of message). This property could be initialize by Qss.

In the function where I append the text, I want to save the current text color, modify it, and restore it (I really need this feature).

See the code below (that doesn't work):

// There, the color is invalid because I didn't defined it in Qss for my class (I want to not defined in certain case to manage default style without qss.).
color = textcolor();
// I change the color and display new text
settextcolor(myNewColor);
append(strText);
// But code below doesn't restore the previous color (I Think it's because the color is Invalid)
settextcolor(color);

I have tried these too (but doesn't work...) :

// Try to save context
QTextCharFormat oFormat = currentCharFormat();

setTextColor(oColor);
append(strText);

// But, the code below doesn't work.
setCurrentCharFormat(oFormat);

I also try with QPalette (palette, setpalette()), but it doesn't work too.

I have search for the same mechanism as QPainter with save() and restore(), but I didn't thind any solution.

Is someone known how to save text color, backgound color and font in a context and restore them after modification ?
The problem in my case, is that If the user (in Qss) doesn't set a color for my property, Qt initialize it with invalid color and take the parent in Qss (but it do it in intern, textcolor() return invalid color). And I didn't found solution to restore this default color.

Please, help me. I'm sure there is a solution, but I didn't find it.

[divanov]

Did I understood it correctly, that you want to append text to the QTextEdit with the same formatting and colour as already entered text in the widget has?

[leanderfr]

I want to append text sometimes with a specific color (as example for warning message in red) or sometimes with the QTextEdit default color.

Take an example. I want to display a standard message, a warning one and a other standard message.
This is the code I execute :

append("First standard message with no specific color");
...
settextcolor(m_WarningTextColor);
append("A warning message with a specific color");
...
append("A second message with no specific color");

If I execute the code above, the last text 'A second message with no specific color' has the same color has warning message.

So I've try this :

OldTextColor = textcolor()
append("First standard message with no specific color");
...
settextcolor(m_WarningTextColor);
append("A warning message with a specific color");
...
settextcolor(OldTextColor);
append("A second message with no specific color");

If I execute the code above, the last text 'A second message with no specific color' is write in black (because OldTextColor retrieve with textcolor() is an invalid color).

And I have the same problem for the backgroundtextcolor.

I hope I was more clear.

So, the question is : How get the default text and background color on a QTextEdit ?