Mouse position: Difference between revisions

=={{header|Ring}}==

In the next example the user can move a label using the mouse

The movement procedure uses the mouse position information

<lang Ring>

Load "guilib.ring"

lPress = false

nX = 0

nY = 0

new qApp {

win1 = new qWidget()

{

setWindowTitle("Move this label!")

setGeometry(100,100,400,400)

setstylesheet("background-color:white;")

Label1 = new qLabel(Win1){

setGeometry(100,100,200,50)

setText("Welcome")

setstylesheet("font-size: 30pt")

myfilter = new qallevents(label1)

myfilter.setEnterevent("pEnter()")

myfilter.setLeaveevent("pLeave()")

myfilter.setMouseButtonPressEvent("pPress()")

myfilter.setMouseButtonReleaseEvent("pRelease()") myfilter.setMouseMoveEvent("pMove()")

installeventfilter(myfilter)

}

show()

}

exec()

}

Func pEnter

Label1.setStyleSheet("background-color: purple; color:white;font-size: 30pt;")

Func pLeave

Label1.setStyleSheet("background-color: white; color:black;font-size: 30pt;")

Func pPress

lPress = True

nX = myfilter.getglobalx()

ny = myfilter.getglobaly()

Func pRelease

lPress = False

pEnter()

Func pMove

nX2 = myfilter.getglobalx()

ny2 = myfilter.getglobaly()

ndiffx = nX2 - nX

ndiffy = nY2 - nY

if lPress

Label1 {

move(x()+ndiffx,y()+ndiffy)

setStyleSheet("background-color: Green;

color:white;font-size: 30pt;")

nX = nX2

ny = nY2

}

ok

</lang>