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Help => Window => Topic started by: ThatSomeMess on March 11, 2012, 12:03:49 am

Title: Possible bug with IsMouseButtonDown(sf::Mouse::Left)
Post by: ThatSomeMess on March 11, 2012, 12:03:49 am

Hi,

I've written a small test program which collects events and draws to the screen only when the left mouse button is down.

The problem occurs with the following sequence of events:

I hold down the left mouse button to start drawing.
I move the mouse cursor outside of the window area.
I release the button.
I move the cursor back into the window area.

Now the screen is still being drawn to even though the mouse button is no longer down.

Code:

Code: [Select]

       if (input.IsMouseButtonDown(sf::Mouse::Left))
        {
            // register action for undo, and save prompt

            while (input.IsMouseButtonDown(sf::Mouse::Left))
            {
                eInst.editActionDraw();

                /* get and discard events */

                win->Clear();
                drawTiles();
                drawUI();
                win->Display();
            }
        }

Title: Possible bug with IsMouseButtonDown(sf::Mouse::Left)
Post by: Laurent on March 11, 2012, 09:26:01 am

It's a bad side effect of how sf::Input is implemented: it collects the window events instead of directly asking the OS. Therefore, anything that happens outside the window is not taken in account.

It's already fixed in SFML 2.