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Signed-off-by: Louise Poubel <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,86 @@ | ||
| /* | ||
| * Copyright (C) 2021 Open Source Robotics Foundation | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| * | ||
| */ | ||
|
|
||
| // Borrowed from | ||
| // https://martin.rpdev.net/2019/01/15/using-delegatemodel-in-qml-for-sorting-and-filtering.html | ||
|
|
||
| import QtQuick 2.9 | ||
| import QtQml.Models 2.3 | ||
|
|
||
| DelegateModel { | ||
| /** | ||
| * Used by sorting. Override it to create custom sort behaviour. | ||
| */ | ||
| property var lessThan: function(_left, _right) | ||
| { | ||
| return true; | ||
| } | ||
|
|
||
| /** | ||
| * Override this function to define what items should be accepted or not. | ||
| */ | ||
| property var filterAcceptsItem: function(_item) | ||
| { | ||
| return true; | ||
| } | ||
|
|
||
| /** | ||
| * Update the item list | ||
| */ | ||
| function update() { | ||
| if (items.count > 0) { | ||
| items.setGroups(0, items.count, "items"); | ||
| } | ||
|
|
||
| // Step 1: Filter items | ||
| var visible = []; | ||
| for (var i = 0; i < items.count; ++i) { | ||
| var item = items.get(i); | ||
| if (filterAcceptsItem(item.model)) { | ||
| visible.push(item); | ||
| } | ||
| } | ||
|
|
||
| // Step 2: Sort the list of visible items | ||
| visible.sort(function(_a, _b) { | ||
| return lessThan(_a.model, _b.model) ? -1 : 1; | ||
| }); | ||
|
|
||
| // Step 3: Add all items to the visible group: | ||
| for (i = 0; i < visible.length; ++i) { | ||
| item = visible[i]; | ||
| item.inVisible = true; | ||
| if (item.visibleIndex !== i) { | ||
| visibleItems.move(item.visibleIndex, i, 1); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| items.onChanged: update() | ||
| onLessThanChanged: update() | ||
| onFilterAcceptsItemChanged: update() | ||
|
|
||
| groups: DelegateModelGroup { | ||
| id: visibleItems | ||
|
|
||
| name: "visible" | ||
| includeByDefault: false | ||
| } | ||
|
|
||
| filterOnGroup: "visible" | ||
| } | ||
|
|
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