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feat(tree-view-table-layout): shift-click a chevron to expand/collapse the whole subtree #322

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feat(tree-view-table-layout): shift-click a chevron to expand/collapse the whole subtree #322

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2 changes: 1 addition & 1 deletion packages/tree-view-table-layout/src/components/table-row.vue
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Original file line number Diff line number Diff line change
Expand Up @@ -131,7 +131,7 @@ function usePreventClickAfterDragging({ mouseDownHandler, clickHandler }) {
name="expand_more"
class="collapse-btn"
:class="{ 'children-collapsed': childrenCollapsed }"
@click.stop="$emit('toggle-children')"
@click.stop="$emit('toggle-children', $event.shiftKey)"
/>
</div>
</td>
Expand Down
42 changes: 40 additions & 2 deletions packages/tree-view-table-layout/src/components/v-table.vue
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Original file line number Diff line number Diff line change
Expand Up @@ -581,14 +581,52 @@ function useTreeView({
return collapsedState.value.includes(id);
}

function onToggleChildren(item: Item) {
function onToggleChildren(item: Item, deep = false) {
if (!item[childrenKey]?.length)
return;

if (deep) {
toggleChildrenDeep(item);
return;
}

item[collapsedKey] = toggleItem(item[itemKey.value]);
collapseChildren(item[itemKey.value], item[childrenKey]);
}

// Shift-click: expand/collapse the ENTIRE subtree. Pick a target state (the opposite of
// the clicked node's current one) and drive the clicked node + every descendant container
// to it, so one gesture fully unfolds or folds the branch instead of a single level.
function toggleChildrenDeep(item: Item) {
const target = !isCollapsed(item[itemKey.value]);
const subtree: PrimaryKey[] = item[childrenKey] ?? [];
const containerIds: PrimaryKey[] = [item[itemKey.value]];

for (const internalItem of internalItems.value) {
if (
subtree.includes(internalItem[itemKey.value])
&& internalItem[childrenKey]?.length
) {
containerIds.push(internalItem[itemKey.value]);
}
}

for (const id of containerIds) {
if (isCollapsed(id) === target)
continue;

const node = internalItems.value.find(
(internalItem) => internalItem[itemKey.value] === id,
);

if (!node)
continue;

node[collapsedKey] = toggleItem(id);
collapseChildren(id, node[childrenKey]);
}
}

function toggleItem(id: PrimaryKey): boolean {
const index = collapsedState.value.indexOf(id);

Expand Down Expand Up @@ -755,7 +793,7 @@ function useTreeView({
:has-click-listener="!disabled && clickable"
:height="rowHeight"
@mouseover.prevent="onDragOver"
@toggle-children="onToggleChildren(item)"
@toggle-children="(deep) => onToggleChildren(item, deep)"
@click="
!disabled && clickable
? $emit('click:row', { item, event: $event })
Expand Down