{"action":"created","comment":{"url":"https://api.github.com/repos/adobe-photoshop/spaces-design/pulls/comments/42282209","id":42282209,"diff_hunk":"@@ -428,14 +429,52 @@ define(function (require, exports, module) {\n          * Update layer models when groups are expanded or collapsed.\n          *\n          * @private\n-         * @param {{documentID: number, layerIDs: Immutable.Iterable.<number>, expanded: boolean}} payload\n+         * @param {object} payload\n+         * @param {number} payload.documentID\n+         * @param {Immutable.Iterable.<number>} payload.layerIDs\n+         * @param {boolean} payload.expanded\n+         * @param {Array.<number>} payload.selected Layer IDs that are newly selected\n+         * @param {Array.<number>} payload.deselected Layer IDs that are newly deselected\n          */\n         _handleGroupExpansion: function (payload) {\n             var documentID = payload.documentID,\n                 layerIDs = payload.layerIDs,\n-                expanded = payload.expanded;\n+                expanded = payload.expanded,\n+                selectedIDs = payload.selected,\n+                deselectedIDs = payload.deselected,\n+                suppressChange = true;\n+\n+            // Suppress the first change event if there will be a second one later\n+            if (selectedIDs.length === 0 && deselectedIDs.length === 0) {\n+                suppressChange = false;\n+            }\n+\n+            // If there will be a selection change, suppress change event for\n+            // initial group expansion change.\n+            this._updateLayerProperties(documentID, layerIDs, { expanded: expanded },\n+                suppressChange);\n+\n+            if (!suppressChange) {\n+                // A change event has already been emitted, and there are no\n+                // further selection changes.\n+                return;","path":"src/js/stores/document.js","position":51,"original_position":51,"commit_id":"3a4c7acdab94830a5a7b9db48bc99a40b459d81a","original_commit_id":"3a4c7acdab94830a5a7b9db48bc99a40b459d81a","user":{"login":"iwehrman","id":1075154,"avatar_url":"https://avatars.githubusercontent.com/u/1075154?v=3","gravatar_id":"","url":"https://api.github.com/users/iwehrman","html_url":"https://github.com/iwehrman","followers_url":"https://api.github.com/users/iwehrman/followers","following_url":"https://api.github.com/users/iwehrman/following{/other_user}","gists_url":"https://api.github.com/users/iwehrman/gists{/gist_id}","starred_url":"https://api.github.com/users/iwehrman/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/iwehrman/subscriptions","organizations_url":"https://api.github.com/users/iwehrman/orgs","repos_url":"https://api.github.com/users/iwehrman/repos","events_url":"https://api.github.com/users/iwehrman/events{/privacy}","received_events_url":"https://api.github.com/users/iwehrman/received_events","type":"User","site_admin":false},"body":"We really need a store-level mechanism to suppress events while multiple changes are happening. But, not for 16.1!","created_at":"2015-10-16T19:44:32Z","updated_at":"2015-10-16T19:44:32Z","html_url":"https://github.com/adobe-photoshop/spaces-design/pull/2963#discussion_r42282209","pull_request_url":"https://api.github.com/repos/adobe-photoshop/spaces-design/pulls/2963","_links":{"self":{"href":"https://api.github.com/repos/adobe-photoshop/spaces-design/pulls/comments/42282209"},"html":{"href":"https://github.com/adobe-photoshop/spaces-design/pull/2963#discussion_r42282209"},"pull_request":{"href":"https://api.github.com/repos/adobe-photoshop/spaces-design/pulls/2963"}}},"pull_request":{"url":"https://api.github.com/repos/adobe-photoshop/spaces-design/pulls/2963","id":47734291,"html_url":"https://github.com/adobe-photoshop/spaces-design/pull/2963","diff_url":"https://github.com/adobe-photoshop/spaces-design/pull/2963.diff","patch_url":"https://github.com/adobe-photoshop/spaces-design/pull/2963.patch","issue_url":"https://api.github.com/repos/adobe-photoshop/spaces-design/issues/2963","number":2963,"state":"open","locked":false,"title":"Update selection when collapsing groups","user":{"login":"iwehrman","id":1075154,"avatar_url":"https://avatars.githubusercontent.com/u/1075154?v=3","gravatar_id":"","url":"https://api.github.com/users/iwehrman","html_url":"https://github.com/iwehrman","followers_url":"https://api.github.com/users/iwehrman/followers","following_url":"https://api.github.com/users/iwehrman/following{/other_user}","gists_url":"https://api.github.com/users/iwehrman/gists{/gist_id}","starred_url":"https://api.github.com/users/iwehrman/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/iwehrman/subscriptions","organizations_url":"https://api.github.com/users/iwehrman/orgs","repos_url":"https://api.github.com/users/iwehrman/repos","events_url":"https://api.github.com/users/iwehrman/events{/privacy}","received_events_url":"https://api.github.com/users/iwehrman/received_events","type":"User","site_admin":false},"body":"This changes selection when collapsing groups to match Photoshop. It ensures that hidden children remain selected when a containing group is collapsed. In particular, this moves selection from selected descendants to the parent, but only if necessary, when collapsing groups. Otherwise, just clicking the group icon will (still) not change the selection. This is the same behavior as the standard Photoshop layer group disclosure triangles AFAICT.\r\n\r\nAddresses 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