Making the Game Engine - C# Game Programming: For Serious Game Creation - page 281

UpdateMouseButtons();
}
private void UpdateMouseButtons()
{
// Reset buttons
MiddlePressed = false;
LeftPressed = false;
RightPressed = false;
if (_leftClickDetect)
{
LeftPressed = true;
_leftClickDetect = false;
}
if (_rightClickDetect)
{
RightPressed = true;
_rightClickDetect = false;
}
if (_middleClickDetect)
{
MiddlePressed = true;
_middleClickDetect = false;
}
}
In the constructor of the mouse, four OpenGL control events have an anon-
ymous delegate attached to them. The mouse click event detects if the left, right,
or middle mouse buttons have been pressed, and this sets a boolean to report if
the event occurred. In the UpdateMouseButtons function, the detect boo-
leans are used to set the public MiddlePressed , LeftPressed , and
RightPressed variables. Presses should only occur for one frame, so at the
start of the function all the button press flags are set to false . After the reset,
the detect variables are checked, and if a press is detected, they are set back to
true. The double-click event could be supported in a similar way.
The next three events determine if any of the mouse buttons are being held
down. The down event detects when the mouse button is pressed down, and the