If Mouse Pressed If Mouse PressedThis action checks for the initial press on a mouse button. It will return true on the single game step (frame) that the button is initially pressed down and false at all other times. If you enable the not modifier, this action will be reversed, and check if the button has not been pressed down, returning false on the game step (frame) that it has been pressed down and true at all other times.. If you need to check for a button being held down and not just the initial press event, then use the action If Mouse Down.
Note that to add actions into the "if" block, they should be dropped to the side of the action, as shown in the image below:
These actions will now be run if the "if" evaluates to true, while any actions dropped elsewhere will be performed after the "if" block.
| Argument | Description |
|---|---|
| Mouse Button | The name of the mouse button to check (see this page for information on mouse button constants). |
| Not | Negate the check (true becomes false and vice versa) |
The above action block code polls the mouse button state every step and if it is being held down it checks for the initial mouse down press. If the check is true on the initial down press the instance speed is set, then, while the button is down, the sprite blending is changed to red. If the mouse is not being held down, a check is done on the mouse release to reset the blending colour to white and set the speed to 0.