Re: [clutter] change color of actor on button press event

["Patrick Shirkey" <pshirkey boosthardware com>]

On Tue, October 23, 2012 8:34 pm, Patrick Shirkey wrote:
> Hi,
>
> What is the best method to change the color of an actor dynamically?
>
> In the code I posted yesterday there is a set_color() function. It works
> when the actor is created and initially displayed.
>
> I tried adding a call to queue_redraw() in the set_color() function but
> that only kicks in after button-release-event. I would like to change the
> color of the actor on button-press-event.
>
>
>     def set_color(self, color):
>         """Fill the shape with the color given in parameter.
>         color may be a Clutter.Color object or a string representing
>         the color name.
>         """
>         if isinstance(color, Clutter.Color):
>             self._color = color
>         else:
>             self._color = Clutter.Color()
>             self._color.from_string(color)

I managed to bypass the color issue temporarily by using set_opacity()
instead. Now I see a different issue.

===
     (keyboard.py:4260): Clutter-WARNING **: The required ID of 445892
does not refer to an existing actor; this usually implies that the
pick() of an actor is not correctly implemented or that there is an
error in the glReadPixels() implementation of the GL driver.
===

1: I can see the "button-press-event" is firing correctly and
change_color() is initiated but the release event is working
intermittently.

2: On some buttons it works almost every time but with other buttons not
at all.

3: The "button-leave-event" works for all buttons every time.

4: On the buttons that are *not* receiving "button-release-event" I get
the error above *after* the "button-press-event" is received and actioned.


- I have tested with clutter 0.8.4 (f16) and 1.10.2 (f17)


++++++++++++++++++++


def change_color(status, keytype, key_widget):

    if(status == 0): # button-press-event
        opacity = 200
    else: # button-release-event/button-leave-event
        opacity = 255

    print("change color", status)
    key_widget.set_opacity(opacity)


def on_click(self, *args):

    key_widget = args[1]
    keytype = args[2]

    print('press event ',keytype)
    change_color(0,keytype, key_widget)

def on_release(self, *args):

    key_widget = args[1]
    keytype = args[2]

    print('release event ',keytype)
    change_color(1,keytype, key_widget)

def on_leave(self, *args):

    key_widget = args[1]
    keytype = args[2]

    print('leave event ', keytype)
    change_color(1,keytype, key_widget)


def create_button():

    roundrect = RoundRectangle()
    stage.add_actor(roundrect)

    roundrect.connect("button-press-event", on_click,roundrect,  "w")
    roundrect.connect('button-release-event', on_release,roundrect,  "w")
    roundrect.connect('leave-event', on_leave,roundrect,  "w")


+++++++++++++++

--
Patrick Shirkey
Boost Hardware Ltd