WorldViz User Forum - Mouse pointer problem

WorldViz User Forum (https://forum.worldviz.com/index.php)

- Vizard (https://forum.worldviz.com/forumdisplay.php?f=17)

- - Mouse pointer problem (https://forum.worldviz.com/showthread.php?t=3466)

Mouse pointer problem

Hi,

In one of my programs I want a DropList to appear during a run and choose an item and then hide the list and the mouse pointer again. It all works fine except that the mouse will not go away until I move it after I disabled it. I tried viz.sendEvent(viz.MOUSE_MOVE_EVENT) to simulate a mouse movement but the pointer only disappears after a real mouse movement. Is it possible to hide the mouse without physically moving it?

Thanks in advance, Albert

Code:

import viz

import vizshape 



viz.go()



vizshape.addGrid()

viz.clearcolor(viz.GRAY)



def enableMouse():

      viz.mouse(viz.ON)

      viz.cursor(viz.ON)

      viz.mouse.setVisible(viz.ON)



def disableMouse():

      viz.mouse(viz.OFF)

      viz.cursor(viz.OFF)

      viz.mouse.setVisible(viz.OFF)





drop = viz.addDropList()

drop.setPosition(0.5, 0.5)

drop.addItems(["a", "b", "c"])

drop.visible(viz.OFF)



disableMouse()



def handleKey(key):

        global drop

        

        if key == 'x':

                drop.visible(viz.ON)

                enableMouse()

        elif key == 'y':

                drop.visible(viz.OFF)

                disableMouse()

                viz.sendEvent(viz.MOUSE_MOVE_EVENT) # does not work, I must move the real mouse to make the pointer go away



                

viz.callback(viz.KEYBOARD_EVENT, handleKey)

I ran into a similar issue a few years ago. What I came up with is show below. I found this function that acts as if the mouse has been moved and the left button clicked.

Code:

from ctypes import *

import time, win32con, win32gui





PUL = POINTER(c_ulong)



class KeyBdInput(Structure):

    _fields_ = [("wVk", c_ushort),

    ("wScan", c_ushort),

    ("dwFlags", c_ulong),

    ("time", c_ulong),

    ("dwExtraInfo", PUL)]



class HardwareInput(Structure):

    _fields_ = [("uMsg", c_ulong),

    ("wParamL", c_short),

    ("wParamH", c_ushort)]



class MouseInput(Structure):

    _fields_ = [("dx", c_long),

    ("dy", c_long),

    ("mouseData", c_ulong),

    ("dwFlags", c_ulong),

    ("time",c_ulong),

    ("dwExtraInfo", PUL)]



class Input_I(Union):

    _fields_ = [("ki", KeyBdInput),

    ("mi", MouseInput),

    ("hi", HardwareInput)]



class Input(Structure):

    _fields_ = [("type", c_ulong),

    ("ii", Input_I)]



class POINT(Structure):

    _fields_ = [("x", c_ulong),

    ("y", c_ulong)]



def click(x,y):

    orig = POINT()

    windll.user32.GetCursorPos(byref(orig))

    windll.user32.SetCursorPos(x,y)

    FInputs = Input * 2

    extra = c_ulong(0)

    ii_ = Input_I()

    ii_.mi = MouseInput( 0, 0, 0, 2, 0, pointer(extra) )

    ii2_ = Input_I()

    ii2_.mi = MouseInput( 0, 0, 0, 4, 0, pointer(extra) )

    x = FInputs( ( 0, ii_ ), ( 0, ii2_ ) )

    windll.user32.SendInput(2, pointer(x), sizeof(x[0]))

    return orig.x, orig.y

You can then call the function like:

click(1,1)

and it's like you clicked it at the location x=1,y=1.

For me, the mouse click was actually more important than moving the mouse, so I ended up modifying the the code so that instead of moving the mouse to the passed x and y, I just kept it at the same point and performed the mouse click.

Aaron

Thanks Aaron, windll.user32.SetCursorPos(x,y) solved my problem.