Function InRectangle

InRectangle(x, y, x1, y1, x2, y2)

The function checks if a point (x, y) is inside rectangle (x1, y1, x2, y2). If you use a function like DrawRectangle to draw a button, you can later use function InRectangle to check if user clicked or moved a mouse over such button. Example below demonstrates that:

$button.color = "white"
$button.text = "Click me"
$button.textColor = "blue"
$button.fontSize = 20
$button.x1 = 10
$button.y1 = 10
SetFontSize($button.fontSize)
$button.x2 = $button.x1 + GetTextWidth($button.text)
$button.y2 = $button.x1 + GetTextHeight($button.text)

function DrawButton()
	SetColor($button.color)
	DrawRectangle ($button.x1, $button.y1, $button.x2, $button.y2)
	SetColor($button.textColor)
	DrawText($button.x1, $button.y1, $button.text)	
end function

function OnMouseMove(x, y)
	if InRectangle(x, y, $button.x1, $button.y1, $button.x2, $button.y2)
		SetCursor("hand")
	else
		SetCursor("Arrow")
	end if
end function

function OnMouseUp(x, y)
	if InRectangle(x, y, $button.x1, $button.y1, $button.x2, $button.y2)
		$button.text = "Clicked"
		DrawButton()
	end if
end function

DrawButton()