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[2.0]-Clear Mouse Button Down Events At App Start?

Hi,

I have a weird issue with SDL 2.0.3 on Microsoft Windows 8.1 Pro 64Bit.
When the SDL2 game first starts it registers a mouse button down event which I want to fix.
How can I clear all mouse button down events at application start in SDL2?

Thanks!

You could just run a loop like:

SDL_Event discard;
while (SDL_PollEvent(&discard)) {}


That will clear the event buffer, and stop once the first few events are fired.  You shouldn't, however, be getting a mouse down unless you're clicking.  Can you try starting your app from the command line; the app might be registering a click from double clicking the executable or something odd like that.  If the command line fixes that, then at least you know where the click is coming from.


-Alex


On Mon, Mar 2, 2015 at 11:06 AM, JeZ-l-Lee wrote:

I should mention that loop should be placed before your main application loop.

On Mon, Mar 2, 2015 at 11:23 AM, Alex Barry wrote:

Hi,

I tried adding what you suggested right before the main loop of the game.
Still getting a mouse button down event right when the game starts?
I know it's a mouse button down event because my company screen skips immediately to title screen.
Only occurs when double-clicking the EXE and not when run from command prompt or Code::Blocks IDE.

Any other ideas?

Hi,

Still have issue with mouse button down at app start.

Here is my code:


Am I doing something wrong?

What is before your for loop?
You need a SDL_PumpEvents(); right before it, so the values of SDL_GetMouseState make sense.
BTW, why do you have MouseButtonPressed[index] = true; MouseButtonWasClicked[index] = true;? Seems redundant.

It looks like in this case, one means "the button is pressed" the other
means "the button was pressed for the first time during this frame," I
think.

Jesse, is this only happening Windows (and is this source code somewhere
I can see?). I'd like to verify if this is an SDL bug before 2.0.4 is
finalized.

Thanks,
--ryan.


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Hi,

I was not doing "SDL_PumpEvents();" before the mouse button code so the problem might have been that?
The development desktop with Windows 8.1 Pro 64Bit blew a PCI network adapter and I am waiting for a replacement.
On my test desktop with Windows 8.1 Pro 64Bit native this issue is not occurring.
I should note that the problem was only on my broken desktop with Win 8.1 Pro 64Bit running in a VMWare Player 7 virtual machine
under a Linux Mint 17.1 KDE 64Bit host.

When I have the dev desktop back up and running I'll see if adding "SDL_PumpEvents();"to the source fixes the issue...
Thanks!

Hi,

"SDL_PumpEvents();" does not solve the problem.

On Win 8.1 Pro 64Bit VMWare Player guest on Linux Mint 17.1 KDE 64Bit host
SDL2 registers a mouse button down when application is 1st run.
(only occurs when EXE is double-clicked)

Hope this can be fixed in 2.0.4, thanks!

Here is the source code to "TetriCrisis 4 110% A.I. Turbo":
http://16bitsoft.com/TC4T/TetriCrisis4110PercentAITurbo.htm
(this web page is private from my Internet portfolio, please don't distribute it)

Hope this issue can be fixed, thanks!

Same issue with left click starting app with double click

changed

if(event.button.button == SDL_BUTTON_LEFT) GoGame();

to

if(event.button.button == SDL_BUTTON_RIGHT) GoGame();


works correctly so seems like its registering the 2nd click as a click

while (SDL_PollEvent(&discard)) { SDL_Delay(100);} // This worked bit lame tho

Hi,

I tried what you typed and it does not work for me?

SDL_Event event;

while (SDL_PollEvent(&event)) { SDL_Delay(1);}

weird I'm using it on the following game it works fine http://gamejolt.com/games/asteroids-flackroid-hd/52501