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telepathyClient: Pin the scrollbar to the bottom

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When new messages come in we want to scroll down so that the user
sees the incoming messages. The current implementation does not work
because it relies on a synchronous allocation hack which does not work
for unmapped notifications.

Fix that by connecting to adjustment::changed and scroll whenever the
adjustment changes which equals "new messages", "new timestamp" or
"presense change", but don't interference with the user's scroll actions
i.e when the user scrolls back to read something don't scroll to the bottom.

https://bugzilla.gnome.org/show_bug.cgi?id=614977
This commit is contained in:
Adel Gadllah 2011-03-09 13:56:35 +01:00
parent dc2cae07b2
commit a0a83428cf
2 changed files with 26 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
js/ui/messageTray.js
View File

@ -518,25 +518,28 @@ Notification.prototype = {
this._updated();
},
// addActor:
// @actor: actor to add to the body of the notification
//
// Appends @actor to the notification's body
addActor: function(actor, style) {
if (!this._scrollArea) {
_createScrollArea: function() {
this.actor.add_style_class_name('multi-line-notification');
this._scrollArea = new St.ScrollView({ name: 'notification-scrollview',
vscrollbar_policy: Gtk.PolicyType.AUTOMATIC,
hscrollbar_policy: Gtk.PolicyType.NEVER,
vfade: true });
this.actor.add(this._scrollArea, { row: 1,
col: 1 });
this.actor.add(this._scrollArea, { row: 1, col: 1 });
this._contentArea = new St.BoxLayout({ name: 'notification-body',
vertical: true });
this._scrollArea.add_actor(this._contentArea);
// If we know the notification will be expandable, we need to add
// the banner text to the body as the first element.
this._addBannerBody();
},
// addActor:
// @actor: actor to add to the body of the notification
//
// Appends @actor to the notification's body
addActor: function(actor, style) {
if (!this._scrollArea) {
this._createScrollArea();
}
this._contentArea.add(actor, style ? style : {});

11
js/ui/telepathyClient.js
View File

@ -279,6 +279,16 @@ Notification.prototype = {
this._responseEntry.clutter_text.connect('activate', Lang.bind(this, this._onEntryActivated));
this.setActionArea(this._responseEntry);
this._oldMaxScrollAdjustment = 0;
this._createScrollArea();
this._scrollArea.vscroll.adjustment.connect('changed', Lang.bind(this, function(adjustment) {
let currentValue = adjustment.value + adjustment.page_size;
if (currentValue == this._oldMaxScrollAdjustment)
this.scrollTo(St.Side.BOTTOM);
this._oldMaxScrollAdjustment = adjustment.upper;
}));
this._history = [];
this._timestampTimeoutId = 0;
},
@ -305,7 +315,6 @@ Notification.prototype = {
let body = this.addBody(text);
body.add_style_class_name(style);
this.scrollTo(St.Side.BOTTOM);
this._history.unshift({ actor: body, time: timestamp, realMessage: true });