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MultiSelect: move demo's ExampleSelection to main api as a convenient ImGuiSelectionBasicStorage for basic users.

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ocornut 2023-12-01 17:49:47 +01:00
parent e0282347db
commit 0f633c1d99
3 changed files with 109 additions and 102 deletions
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39
imgui_widgets.cpp
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@ -7112,6 +7112,7 @@ void ImGui::DebugNodeTypingSelectState(ImGuiTypingSelectState* data)
// - MultiSelectItemHeader() [Internal]
// - MultiSelectItemFooter() [Internal]
// - DebugNodeMultiSelectState() [Internal]
// - ImGuiSelectionBasicStorage
//-------------------------------------------------------------------------
static void DebugLogMultiSelectRequests(const char* function, const ImGuiMultiSelectIO* io)
@ -7612,6 +7613,44 @@ void ImGui::DebugNodeMultiSelectState(ImGuiMultiSelectState* storage)
#endif
}
// Apply requests coming from BeginMultiSelect() and EndMultiSelect().
// - Enable 'Demo->Tools->Debug Log->Selection' to see selection requests as they happen.
// - Honoring SetRange requests requires that you can iterate/interpolate between RangeFirstItem and RangeLastItem.
// - In this demo we often submit indices to SetNextItemSelectionUserData() + store the same indices in persistent selection.
// - Your code may do differently. If you store pointers or objects ID in ImGuiSelectionUserData you may need to perform
// a lookup in order to have some way to iterate/interpolate between two items.
// - A full-featured application is likely to allow search/filtering which is likely to lead to using indices
// and constructing a view index <> object id/ptr data structure anyway.
// WHEN YOUR APPLICATION SETTLES ON A CHOICE, YOU WILL PROBABLY PREFER TO GET RID OF THIS UNNECESSARY 'ImGuiSelectionBasicStorage' INDIRECTION LOGIC.
// Notice that with the simplest adapter (using indices everywhere), all functions return their parameters.
// The most simple implementation (using indices everywhere) would look like:
// for (ImGuiSelectionRequest& req : ms_io->Requests)
// {
// if (req.Type == ImGuiSelectionRequestType_Clear) { Clear(); }
// if (req.Type == ImGuiSelectionRequestType_SelectAll) { Clear(); for (int n = 0; n < items_count; n++) { AddItem(n); } }
// if (req.Type == ImGuiSelectionRequestType_SetRange) { for (int n = (int)ms_io->RangeFirstItem; n <= (int)ms_io->RangeLastItem; n++) { UpdateItem(n, ms_io->RangeSelected); } }
// }
void ImGuiSelectionBasicStorage::ApplyRequests(ImGuiMultiSelectIO* ms_io, int items_count)
{
IM_ASSERT(AdapterIndexToStorageId != NULL);
for (ImGuiSelectionRequest& req : ms_io->Requests)
{
if (req.Type == ImGuiSelectionRequestType_Clear)
Clear();
if (req.Type == ImGuiSelectionRequestType_SelectAll)
{
Storage.Data.resize(0);
Storage.Data.reserve(items_count);
for (int idx = 0; idx < items_count; idx++)
AddItem(AdapterIndexToStorageId(this, idx));
}
if (req.Type == ImGuiSelectionRequestType_SetRange)
for (int idx = (int)req.RangeFirstItem; idx <= (int)req.RangeLastItem; idx++)
UpdateItem(AdapterIndexToStorageId(this, idx), req.RangeSelected);
}
}
//-------------------------------------------------------------------------
// [SECTION] Widgets: ListBox
//-------------------------------------------------------------------------