Hiding cursor when left mosue button clicked

[NeRoX]

Hi, in my OnEvent I writed:

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		if(event.MouseInput.Event == EMIE_LMOUSE_PRESSED_DOWN)   
			mouseDownL = true;
		
		if (event.MouseInput.Event == EMIE_LMOUSE_LEFT_UP)
			mouseDownL = false;

and in my loop I writted:

Code: Select all

device->getCursorControl()->setVisible(!mouseDownL);

Now, if I just click on the left button, it's hiding the cursor. If I click on the left button continuity and moving the mouse, the cursor is shown.

How can I fix that?

Thanks!!

P.S: Sorry for english

[NeRoX]

someone?

thanks

[Seven]

I dont understand the trouble. I use the same type of thing in my app. here is a paste of the code for that.

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					case EMIE_LMOUSE_LEFT_UP :
					 { 
						// what a freakin hack
						m_LMouseButtonDown = false;
						return false;
					 } break;

[pera]

Maybe you have some error in code? Could you post whole OnEvent function or part handling mouse events?

[rogerborg]

What platforms are all y'all using?

[pera]

What platforms are all y'all using?

me? computer?

[rogerborg]

What platforms are all y'all using?

me? computer?

All y'all.

The cursor implementation is platform dependent, so it matters what OS you're using.

[pera]

Im using windows but I don't believe
device->getCursorControl()->setVisible(true);
would work diferently on linux?

[Acki]

hmm, you're right, it's prety strange...
I made a small test prog:

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#include <irrlicht.h>

using namespace irr;
using namespace core;
using namespace scene;
using namespace video;
using namespace io;
using namespace gui;

bool mouseDownL;

class MyEventReceiver : public IEventReceiver{
public:
	virtual bool OnEvent(const SEvent& event){
		if (event.EventType == EET_MOUSE_INPUT_EVENT){
        if(event.MouseInput.Event == EMIE_LMOUSE_PRESSED_DOWN){
          printf("1\n");
          mouseDownL = true;
          return false; // doesn't matter is I return true or false
        }
        if(event.MouseInput.Event == EMIE_LMOUSE_LEFT_UP){
          printf("2\n");
          mouseDownL = false;
          return false; // doesn't matter is I return true or false
        }
		}
		return false;
	}
};

int main(){
  MyEventReceiver recv;
	IrrlichtDevice *device = createDevice(EDT_DIRECT3D9, dimension2d<s32>(640, 480), 16, false, false, false, &recv);
	IVideoDriver* driver = device->getVideoDriver();
	ISceneManager* smgr = device->getSceneManager();

	while(device->run()){
		driver->beginScene(true, true, video::SColor(0,0,0,0));
		smgr->drawAll();
		driver->endScene();

    device->getCursorControl()->setVisible(!mouseDownL);

	}
	
	device->drop();
	return 0;
}

what happens is: when you press the left mouse button "1" is printed to the console, but the cursor doesn't hide...
when you left the button up "2" is printed and the cursor hides until you move the mouse, then the cursor is shown again...
that's realy strange !!!

[JP]

I think this is similar to a bug we've seen before that if you've got the cursor hidden and then unhide it then it only actually becomes visible when it's moved, so you unhide it and then call setPosition(cursorPos) to force it.

but that doesn't really explain why it doesn't hide it when you mousedown...

maybe try cursor->setVisible(false); cursor->setPosition(cursor->getPosition());

?

[Acki]

but that doesn't really explain why it doesn't hide it when you mousedown...

right !!!

I also changed the render loop to this:

Code: Select all

bool om = mouseDownL;
while(device->run()){
  driver->beginScene(true, true, video::SColor(0,0,0,0));
  smgr->drawAll();
  driver->endScene();

  if(om != mouseDownL){
    printf("%d\n",mouseDownL);
    device->getCursorControl()->setVisible(!mouseDownL);
    device->getCursorControl()->setPosition(device->getCursorControl()->getPosition());
    om = mouseDownL;
  }
}

it prints the correct button status (1 if down and 0 if up), but the cursor doesn't hide at all !!!
the hiding from the previous code is now eliminated because of the setPosition of the cursor...

[hybrid]

Windows cannot hide the Cursor while the mouse button is pressed. There are some workarounds described on MSDN, but I'm not really into this strange stuff.

[JP]

but I'm not really into this strange stuff.

I has pictars that says otherwise...

More on topic.... NeRoX, can i just ask, out of interest, what your reason is for wanting to hide the cursor whilst the mouse is pressed?

I can think of a really simple workaround. Hide the cursor always and then draw your own cursor (can be identical to the standard cursor) at its location each frame and when you want to hide it just stop drawing it.

Et.

Voila.

[Acki]

Windows cannot hide the Cursor while the mouse button is pressed.

wow, I'm now working for years with Windows and didn't know this...
well, another benefit of Windoofs !!!

[ecsos]

i posted a code snippet on this a while back:
it will fix the problem....i have it working in my current code if you need a patch for the current svn
http://irrlicht.sourceforge.net/phpBB2/ ... hp?t=27235