Thread: Mouse clicks inside game loop

You have to call GetDeviceState() per frame for this setup to work. Otherwise the mousestate structure will reflect the mouse state as it was on the last call to GetDeviceState().

Code:

HRESULT CMouse::Update(void)
{
    
    //Get current state from driver
    return m_pDID8->GetDeviceState(sizeof(DIMOUSESTATE),(LPVOID)&_mousestate);
    
}

I am, I didn't include it with the code sample.

DirectInput framework source file

Code:

void Poll_Mouse()
{
    dimouse->GetDeviceState(sizeof(mouse_state), (LPVOID)&mouse_state);
}

Inside game loop

Code:

    //update mouse and keyboard
    Poll_Mouse();
    Poll_Keyboard();

The mouse works fine; I’m looking for a way to check for a mouse button "release", not press. The above fix (in my first post) seems to be working fine but out of curiosity I'm wondering if a button “release” test expression exists.

To be fair here I gave you a circular answer. To test if the mouse button is up you will need to set a variable when it is down. Then if this variable is set, you need to check the data structure for the mouse button to see if it is still set. If not, and your variable is set, then you know the mouse button is being released. The rgbButtons[] array will tell you everything you need to know. Since this information is set every time you call GetDeviceState() you can simply check the value of the button if your down variable is set.

Code:

#define LMB 0

if (rgbButtons[LMB])
{
  m_bLMBDown=true;
}

if (m_bLMBDown)
{
  //This will evaluate when GetDeviceState() populates rgbButtons[] and the left mouse button is released
  if (rgbButtons[LMB]==0) 
  {
     m_bLMBDown=false;
     //Button has been released
     m_bClick[LMB]=true;
  }
}

You could use a similar setup to create a ButtonUp() function for your mouse class.