Elemental problem with scope Topic is solved

[pottsmgg]

As you can see. I am new to Ubuntu and wx widgets.
My time with C++ is limited to MS Visual C# and C++.
I am told it is not possible to change a Buttons color from green to red using a datetime ticks. The answer is to draw your own.
I am trying the project with widgets. I have a problem with te following code. It seems elementry but I cant solve it.

Code: Select all

void toggle_2Frame::OnButton1Click(wxCommandEvent& event)
{

***************************************************
OK
    this->Panel2->Show();
***************************************************
    /* wxMessageBox( _("This is a wxWidgets Hello world sample"),
                  _("About Hello World"),
                  wxOK | wxICON_INFORMATION, this);  */
     wxMessageBox( _("Click Again"));
***************************************************
OK
      this->Panel2->Hide(); 
***************************************************

}

void togglepanel2(void)
{
    if(panel_status == true)
    {
    panel_status = false;
**********************************************
    this->Panel2->Hide(); 
  
/toggle_2Main.cpp|132|error: invalid use of 'this' in non-member function

***********************************************
    else
    {
    this->Panel2->Show();
    panel_status = true;
    }
}

EDIT by Auria : please use code tags

[Auria]

First, please use code tags when posting code.
Second, I don't really understand the code you posted.

The part where it says "error: invalid use of 'this' in non-member function" is a very clear error message, you cannot use "this" outside of classes; are you familiar with object-oriented programming?

[pottsmgg]

Sorry I don't know what code tags are.

This compiled OK

***************************************************
OK
this->Panel2->Hide();
***************************************************

This is line 132 did not compile.

**********************************************
this->Panel2->Hide();

/toggle_2Main.cpp|132|error: invalid use of 'this' in non-member function

***********************************************

The question is Why.

Martin

[jfouche]

Because you invoke this outside the class. You created a function instead of a class method.

You used

Code: Select all

void togglepanel2(void)

instead of

Code: Select all

void toggle_2Frame::togglepanel2(void)

.

[Auria]

About code tags see
http://forums.wxwidgets.org/faq.php?mode=bbcode#5

[pottsmgg]

Thanks for your patience.
I was able to blink the panel with the timer, something I could not do with MS Visual Basic, C# , C++.
This was my first experience with Linex>
Thanks Martin