[gnome-shell] dateMenu: Use BindConstraint for indicator pad

[Florian Müllner <fmuellner src gnome org>]

commit 6e7344b837e8d90593104418d47544687597ddc6
Author: Florian Müllner <fmuellner gnome org>
Date:   Wed Feb 19 01:52:59 2020 +0100

    dateMenu: Use BindConstraint for indicator pad
    
    Now that Clutter.BindConstraint modifies the size request in addition to
    the allocation, we can use it instead of the custom IndicatorPad widget.
    
    https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/1026

 js/ui/dateMenu.js | 31 ++++++++++---------------------
 1 file changed, 10 insertions(+), 21 deletions(-)
---
diff --git a/js/ui/dateMenu.js b/js/ui/dateMenu.js
index 8fb56b1921..fbfccfc1b4 100644
--- a/js/ui/dateMenu.js
+++ b/js/ui/dateMenu.js
@@ -488,26 +488,6 @@ class MessagesIndicator extends St.Icon {
     }
 });
 
-var IndicatorPad = GObject.registerClass(
-class IndicatorPad extends St.Widget {
-    _init(actor) {
-        this._source = actor;
-        this._source.connect('notify::size', () => this.queue_relayout());
-        super._init();
-        this._source.bind_property('visible',
-            this, 'visible',
-            GObject.BindingFlags.SYNC_CREATE);
-    }
-
-    vfunc_get_preferred_width(forHeight) {
-        return this._source.get_preferred_width(forHeight);
-    }
-
-    vfunc_get_preferred_height(forWidth) {
-        return this._source.get_preferred_height(forWidth);
-    }
-});
-
 var FreezableBinLayout = GObject.registerClass(
 class FreezableBinLayout extends Clutter.BinLayout {
     _init() {
@@ -576,8 +556,17 @@ class DateMenuButton extends PanelMenu.Button {
         this._clockDisplay = new St.Label({ y_align: Clutter.ActorAlign.CENTER });
         this._indicator = new MessagesIndicator();
 
+        const indicatorPad = new St.Widget();
+        this._indicator.bind_property('visible',
+            indicatorPad, 'visible',
+            GObject.BindingFlags.SYNC_CREATE);
+        indicatorPad.add_constraint(new Clutter.BindConstraint({
+            source: this._indicator,
+            coordinate: Clutter.BindCoordinate.SIZE,
+        }));
+
         let box = new St.BoxLayout({ style_class: 'clock-display-box' });
-        box.add_actor(new IndicatorPad(this._indicator));
+        box.add_actor(indicatorPad);
         box.add_actor(this._clockDisplay);
         box.add_actor(this._indicator);