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MultiSelect: ImGuiSelectionBasicStorage: simplify by removing compacting code (compacting may be opt-in?).

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GetNextSelectedItem() wrapper gives us more flexibility to work on this kind of stuff now.
This commit is contained in:
ocornut 2024-06-11 18:50:30 +02:00
parent e61612a687
commit 2af3b2ac81
2 changed files with 11 additions and 40 deletions
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4
imgui.h
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@ -2835,7 +2835,7 @@ struct ImGuiSelectionBasicStorage
{
// Members
ImGuiStorage _Storage; // [Internal] Selection set. Think of this as similar to e.g. std::set<ImGuiID>. Prefer not accessing directly: iterate with GetNextSelectedItem().
int Size; // Number of selected items, maintained by this helper.
int Size; // Number of selected items (== number of 1 in the Storage), maintained by this helper.
void* UserData; // User data for use by adapter function // e.g. selection.UserData = (void*)my_items;
ImGuiID (*AdapterIndexToStorageId)(ImGuiSelectionBasicStorage* self, int idx); // e.g. selection.AdapterIndexToStorageId = [](ImGuiSelectionBasicStorage* self, int idx) { return ((MyItems**)self->UserData)[idx]->ID; };
@ -2849,7 +2849,7 @@ struct ImGuiSelectionBasicStorage
ImGuiSelectionBasicStorage() { Size = 0; UserData = NULL; AdapterIndexToStorageId = [](ImGuiSelectionBasicStorage*, int idx) { return (ImGuiID)idx; }; }
void Clear() { _Storage.Data.resize(0); Size = 0; }
void Swap(ImGuiSelectionBasicStorage& r) { _Storage.Data.swap(r._Storage.Data); int lhs_size = Size; Size = r.Size; r.Size = lhs_size; }
IMGUI_API void SetItemSelected(ImGuiID id, bool selected);
void SetItemSelected(ImGuiID id, bool v) { int* p_int = _Storage.GetIntRef(id, 0); if (v && *p_int == 0) { *p_int = 1; Size++; } else if (!v && *p_int != 0) { *p_int = 0; Size--; } }
};
// Optional helper to apply multi-selection requests to existing randomly accessible storage.

47
imgui_widgets.cpp
View File

@ -7830,63 +7830,34 @@ ImGuiID ImGuiSelectionBasicStorage::GetNextSelectedItem(void** opaque_it)
if (it == NULL)
it = _Storage.Data.Data;
IM_ASSERT(it >= _Storage.Data.Data && it <= it_end);
if (it != it_end)
while (it->val_i == 0 && it < it_end)
it++;
const bool has_more = (it != it_end);
*opaque_it = has_more ? (void**)(it + 1) : (void**)(it);
return has_more ? it->key : 0;
}
// Basic function to update selection (for very large amounts of changes, see what ApplyRequests is doing)
void ImGuiSelectionBasicStorage::SetItemSelected(ImGuiID id, bool selected)
{
ImGuiStoragePair* it = ImLowerBound(_Storage.Data.Data, _Storage.Data.Data + _Storage.Data.Size, id);
if (selected == (it != _Storage.Data.Data + _Storage.Data.Size) && (it->key == id))
return;
if (selected)
_Storage.Data.insert(it, ImGuiStoragePair(id, 1));
else
_Storage.Data.erase(it);
Size = _Storage.Data.Size;
}
// Optimized for batch edits (with same value of 'selected')
static void ImGuiSelectionBasicStorage_BatchSetItemSelected(ImGuiSelectionBasicStorage* selection, ImGuiID id, bool selected, int size_before_amends)
{
ImGuiStorage* storage = &selection->_Storage;
ImGuiStoragePair* it = ImLowerBound(storage->Data.Data, storage->Data.Data + size_before_amends, id);
if (selected == (it != storage->Data.Data + size_before_amends) && (it->key == id))
const bool is_contained = (it != storage->Data.Data + size_before_amends) && (it->key == id);
if (selected == is_contained && it->val_i == 1)
return;
if (selected)
if (selected && !is_contained)
storage->Data.push_back(ImGuiStoragePair(id, 1)); // Push unsorted at end of vector, will be sorted in SelectionMultiAmendsFinish()
else
it->val_i = 0; // Clear in-place, will be removed in SelectionMultiAmendsFinish()
else if (is_contained)
it->val_i = selected ? 1 : 0; // Modify in-place.
selection->Size += selected ? +1 : -1;
}
static void ImGuiSelectionBasicStorage_Compact(ImGuiSelectionBasicStorage* selection)
{
ImGuiStorage* storage = &selection->_Storage;
ImGuiStoragePair* p_out = storage->Data.Data;
ImGuiStoragePair* p_end = storage->Data.Data + storage->Data.Size;
for (ImGuiStoragePair* p_in = p_out; p_in < p_end; p_in++)
if (p_in->val_i != 0)
{
if (p_out != p_in)
*p_out = *p_in;
p_out++;
}
storage->Data.Size = (int)(p_out - storage->Data.Data);
}
static void ImGuiSelectionBasicStorage_BatchFinish(ImGuiSelectionBasicStorage* selection, bool selected, int size_before_amends)
{
ImGuiStorage* storage = &selection->_Storage;
if (selection->Size == size_before_amends)
return;
if (selected)
if (selected && selection->Size != size_before_amends)
storage->BuildSortByKey(); // When done selecting: sort everything
else
ImGuiSelectionBasicStorage_Compact(selection); // When done unselecting: compact by removing all zero values (might be done lazily when iterating selection?)
IM_ASSERT(selection->Size == storage->Data.Size);
}
// Apply requests coming from BeginMultiSelect() and EndMultiSelect().