Re: Problem with simple Gnome Shell Extension

[philip chimento gmail com]

On Wed, Apr 26, 2017, 09:05 Sven Wick <Sven Wick gmx de> wrote:

Hi,

 

I have a problem with my first extension
which just creates a button that shows a label when clicked
and removes the label when the mouse moves away.

The issue I have is that when I click twice or more
before I move the mouse, the label sticks to the screen.

Actually, it looks like that every click creates a new label
and only the last one gets removed.

 

I tried to put the line which creates the label to different parts
but then I always get an "undefined" in the log.

Could someone give me a hint how to fix this?

============

extension.js

============

 

const St        = imports.gi.St;
const Main      = imports.ui.main;
const Lang      = imports.lang;
const Clutter   = imports.gi.Clutter;
const PanelMenu = imports.ui.panelMenu;

 

const TestIndicator = new Lang.Class({

    Name: 'TestIndicator',
    Extends: PanelMenu.Button,

 

    _init: function () {
        this.parent(0.0, "Test Indicator", false);

        this.buttonText = new St.Label({
            text: _("Test..."),
            y_align: Clutter.ActorAlign.CENTER
        });

    this.actor.connect('button-press-event', this._showData);
    //this.actor.connect('enter-event', this._showData);
    this.actor.connect('leave-event', this._hideData);
    this.actor.add_actor(this.buttonText);

    },

 

    _showData: function () {

        this.label = new St.Label({ style_class: 'test-label', text: "TEST" });

        let monitor = Main.layoutManager.primaryMonitor;
 
        this.label.set_position(Math.floor(monitor.width  / 2 - this.label.width  / 2),
                                Math.floor(monitor.height / 2 - this.label.height / 2));

        Main.uiGroup.add_actor(this.label);
    
    },

 

    _hideData: function () {

        if (Main.uiGroup.contains(this.label)) {
            Main.uiGroup.remove_actor(this.label);
        }

    },

 

    stop: function() {
        this.menu.removeAll();
    }

});

 

function init() {
}

 

function enable() {
    testIndicator = new TestIndicator;
    Main.panel.addToStatusArea('test-indicator', testIndicator);
}

 

function disable() {
    testIndicator.stop();
    testIndicator.destroy();
}

 

=============

metadata.json

==============

 

{"shell-version": ["3.10", "3.14", "3.18"], "uuid": "test", "name": "test", "description": "shows test label"}

 

==============

stylesheet.css

==============

 

.test-label {
    font-size: 36px;
    font-weight: bold;
    color: #DC143C;
    background-color: rgba(10,10,10,0.7);
    border-radius: 5px;
    padding: .5em;
}

 

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Hi Sven,

This is probably a better question for gnome-shell-list; I've forwarded it there.

You probably want to keep only one instance of a label, and change its text rather than creating a new label.

Regards,

Philip C