Clearing a Stringw

[rtr_18]

Hi!
I'm drawing a wide char string(irr::core::stringw) using
IGUIFont::draw(). I'm drawing a particular string while mouse hovering an image(by doing hit test). I'm drawing a different string while the mouse is away from the image. My normal string(Mouse away string) is overlapping with my mouse over string. How to clear the mouse over string?

[Mani2010]

post your code, it seems a simple fix

[greenya]

IGUIFont::draw() draws directly to viewport, so the drawn string will be cleared only when you beginScene(...with clearing color buffer...) again.

All should be fine if you do it in next way:

Code: Select all

driver->beginScene();

....

if (mouseHoversTheImage)
   s = "OVER";
else
   s = "AWAY";

font->draw(s);

....
driver->endScene();

so you redraw necessary text every frame.

[rtr_18]

Hi!
I'm using this code inside the gameloop.

Code: Select all

for(int i = 0; i < levels; i++)
{
  MousePtr = device->getCursorControl()->getPosition();  
  if(circleImage[i]->getRelativePosition().isPointInside(MousePtr))
 {
   GetString(i);
  }
  else
    GetString(curLevel);
}
  pManager->getFont()->draw(testStr.c_str(),recti(20,20,100,60),RED,true);

"testStr" is a private variable in my class and assigned value in the function GetString(int). If use the above code as u suggested mouse hover string is not drawn(only current level string is always drawn). If I draw the string in both if and else sections(i.e placing last line of code in both the sections), Mouse hover and current level strings are overlapping.
How to resolve this problem?

[Mani2010]

Would be interested in seeing you GetString function, i think something strange may be happening in there. But that wouldn't explain the overlap.

I don't think this has anything to do with Irrlicht.

Here is one solution.

Code: Select all

bool bDrawHoverString = false;
MousePtr = device->getCursorControl()->getPosition();  
for(int i = 0; i < levels; i++) 
{ 
    if(circleImage[i]->getRelativePosition().isPointInside(MousePtr)) 
    { 
       bDrawHoverString = true;
       break;
     } 
} 

if( bDrawHoverString )
{
//  set the string here
testStr = "We are hovering";
 }
else
{
//  set the string here
testStr = "We are NOT hovering";
}
 pManager->getFont()->draw(testStr.c_str(),recti(20,20,100,60),RED,true);