Clearing the screen

Im not sure if this is the right forum, but ill ask anyway.

I have a program which creates a window with a menu. If you click on an element of the menu (such as help -> about) then it displays some text. However, I'm not sure how to make that text dissapear when you click on another element of the menu. Any suggestions?

Is this a console application or a GUI application? What OS? What compiler?

gg

Well, its not a console, so I'd guess its a GUI (not sure)

My compiler is Dev C++

My comp is windows xp.

If you click on an element of the menu (such as help -> about) then it displays some text.

How is the text displayed?

However, I'm not sure how to make that text dissapear when you click on another element of the menu. Any suggestions?

I am going to assume you're talking about a Win32 program.

If the text is part of a static control, use ShowWindow to make the control invisible, which hides the text.

If the text is being drawn when you handle WM_PAINT, just stop drawing. This may require you to use a boolean variable.

Originally Posted by Dante Shamest

How is the text displayed?



I am going to assume you're talking about a Win32 program.

If the text is part of a static control, use ShowWindow to make the control invisible, which hides the text.

If the text is being drawn when you handle WM_PAINT, just stop drawing. This may require you to use a boolean variable.

The text is displayed with the code:

Code:

TextOut(hdc,0,0,"Text",strlen("Text. Don't know why there is a second one..."));

Yeah, i guess it is Win32... Since i'm sorta new to C++, all these abbreviations confuse me at times. Also, im not sure what you mean by that last paragraph.

I highly suggest that you learn the language first - then learn to use the language to make GUI applications.

gg

Originally Posted by Olidivera

Also, im not sure what you mean by that last paragraph.

Something like this:

Code:

if ( canDraw )
  TextOut( ...etc... );

where canDraw is a boolean variable:

Code:

bool canDraw;

When do you draw the text? Ideally you should draw it when the WM_PAINT message is raised... then use an if like Dante said. You can explicitly call WM_PAINT by either using SendMessage or just InvalideRect() works well.