How to change the color of the dialog？

[600888]

How to change the color of the dialog box, I have overridden the getPalette() method as required, but this does not work, the dialog box displays red by default, why?

[magiblot]

Hi @600888!

Sorry for the late answer.

I am uncertain why you are facing this issue. The white-over-red color is automatically used when there is something wrong with the palette. However, I don't see anything wrong in your definition of YcViewDialog::getPalette(), so the problem is likely somewhere else. Is the getPalette() method overriden in any other classes? Which class are the YcViewDialog instances being inserted into?

Note, however, that if your only purpose is to use the blue dialog palette, you can also achieve this not by overriding getPalette(), but by setting the palette member variable (inherited from TWindow) to the constant dpBlueDialog, like this:

class MyDialog : public TDialog
{
public:
    MyDialog(const TRect &bounds, TStringView title) :
        TWindowInit(initFrame),
        TDialog(bounds, title)
    {
        palette = dpBlueDialog;
    }
};

Cheers.

[600888]

Thank you for your reply, but it seems that it didn't work. Let me describe my design in detail. Here is my design structure:

First, I created a TAPP，like this:

then Pressing F2 on the TAPP interface will open the StationViewDialog interface, as shown in the figure below:

In the StationViewDialog class, I placed the YcViewDialog. Clicking on the location indicated by the red arrow in the figure can open the YcViewDialog. I want the color style of YcViewDialog to be blue like StationViewDialog, but it becomes red instead.

[magiblot]

Okay, I see where the problem is.

Here are some screenshots from the Turbo Vision's programming guide that will help you understand how palettes actually work.

Turbo Vision's palette system has the disadvantage that when you design a palette, you have to take into account the class into which your view will be inserted.

The cause of your issue is that YcViewDialogs and YxViewDialogs are being inserted into StationViewDialogs, but still use standard TDialog palettes which assume the owner view will be a TApplication or TDesktop.

There are two possible basic solutions that come to my mind:

• Insert YcViewDialogs and YxViewDialogs into the desktop and not into another dialog (which is the most common practice):

  TProgram::deskTop->insert(ycViewDialog);

  Or, if the dialog must be modal:

  TProgram::deskTop->execView(ycViewDialog);

• Modify YcViewDialog's and YxViewDialog's getPalette() method into this:

  virtual TPalette &getPalette() const override
  {
      return TView::getPalette();
  }

  With this you won't see the white-over-red color issue but you will keep the same colors as StationViewDialog.

Cheers.

[600888]

Thank you for your patient help, the problem has been successfully solved now!