[IMP] Add an option to initialize the timeline window on display.

The default window display all the events (aka 'fit'), in case of events spread over the year, the events are invisibles (too small to be readable)

Signed-off-by: adrien.didenot <adrien.didenot@horanet.com>

web_timeline/README.rst

@@ -31,6 +31,9 @@ the possible attributes for the tag:
   additional key is down. Available values are '' (does not apply), 'altKey',
   'ctrlKey', or 'metaKey'. Set this option if you want to be able to use the
   scroll to navigate vertically on views with a lot of events.
+* default_window (optional): Specifies the initial visible window. Aviable values are:
+  'day' to display the next 24 hours, 'week', 'month' and 'fit'.
+  Default value is 'fit' to adjust the visible window such that it fits all items
 * event_open_popup (optional): when set to true, it allows to edit the events
   in a popup. If not (default value), the record is edited changing to form
   view.

web_timeline/static/src/js/web_timeline.js

@@ -111,6 +111,7 @@ odoo.define('web_timeline.TimelineView', function (require) {
             this.date_delay = attrs.date_delay;
             this.no_period = this.date_start == this.date_stop;
             this.zoomKey = attrs.zoomKey || '';
+            this.default_window = attrs.default_window || 'fit';
 
             if (!isNullOrUndef(attrs.quick_create_instance)) {
                 self.quick_create_instance = 'instance.' + attrs.quick_create_instance;
@@ -171,6 +172,27 @@ odoo.define('web_timeline.TimelineView', function (require) {
                 onRemove: self.on_remove,
                 zoomKey: this.zoomKey
             };
+            if (this.default_window) {
+                var start = new moment();
+                var end;
+                switch (this.default_window) {
+                    case 'day':
+                        end = new moment().add(1, 'days');
+                        break;
+                    case 'week':
+                        end = new moment().add(1, 'weeks');
+                        break;
+                    case 'month':
+                        end = new moment().add(1, 'months');
+                        break;
+                }
+                if (end) {
+                    options['start'] = start;
+                    options['end'] = end;
+                }else{
+                   this.default_window = 'fit';
+                }
+            }
             self.timeline = new vis.Timeline(self.$timeline.empty().get(0));
             self.timeline.setOptions(options);
             if (self.mode && self['on_scale_' + self.mode + '_clicked']) {
@@ -333,7 +355,9 @@ odoo.define('web_timeline.TimelineView', function (require) {
             var groups = split_groups(events, group_bys);
             this.timeline.setGroups(groups);
             this.timeline.setItems(data);
+            if (!this.default_window || this.default_window == 'fit'){
                 this.timeline.fit();
+            }
         },
 
         do_show: function () {