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Demo: Tweak table sorting demo code.

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This commit is contained in:
ocornut 2023-09-01 14:35:57 +02:00
parent 303dc091b4
commit 8c497793f9
1 changed files with 17 additions and 14 deletions
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31
imgui_demo.cpp
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@ -3785,6 +3785,14 @@ struct MyItem
// very often by the sorting algorithm it would be a little wasteful. // very often by the sorting algorithm it would be a little wasteful.
static const ImGuiTableSortSpecs* s_current_sort_specs; static const ImGuiTableSortSpecs* s_current_sort_specs;
static void SortWithSortSpecs(ImGuiTableSortSpecs* sort_specs, MyItem* items, int items_count)
{
s_current_sort_specs = sort_specs; // Store in variable accessible by the sort function.
if (items_count > 1)
qsort(items, (size_t)items_count, sizeof(items[0]), MyItem::CompareWithSortSpecs);
s_current_sort_specs = NULL;
}
// Compare function to be used by qsort() // Compare function to be used by qsort()
static int IMGUI_CDECL CompareWithSortSpecs(const void* lhs, const void* rhs) static int IMGUI_CDECL CompareWithSortSpecs(const void* lhs, const void* rhs)
{ {
@ -5304,14 +5312,11 @@ static void ShowDemoWindowTables()
ImGui::TableHeadersRow(); ImGui::TableHeadersRow();
// Sort our data if sort specs have been changed! // Sort our data if sort specs have been changed!
if (ImGuiTableSortSpecs* sorts_specs = ImGui::TableGetSortSpecs()) if (ImGuiTableSortSpecs* sort_specs = ImGui::TableGetSortSpecs())
if (sorts_specs->SpecsDirty) if (sort_specs->SpecsDirty)
{ {
MyItem::s_current_sort_specs = sorts_specs; // Store in variable accessible by the sort function. MyItem::SortWithSortSpecs(sort_specs, items.Data, items.Size);
if (items.Size > 1) sort_specs->SpecsDirty = false;
qsort(&items[0], (size_t)items.Size, sizeof(items[0]), MyItem::CompareWithSortSpecs);
MyItem::s_current_sort_specs = NULL;
sorts_specs->SpecsDirty = false;
} }
// Demonstrate using clipper for large vertical lists // Demonstrate using clipper for large vertical lists
@ -5519,15 +5524,13 @@ static void ShowDemoWindowTables()
ImGui::TableSetupScrollFreeze(freeze_cols, freeze_rows); ImGui::TableSetupScrollFreeze(freeze_cols, freeze_rows);
// Sort our data if sort specs have been changed! // Sort our data if sort specs have been changed!
ImGuiTableSortSpecs* sorts_specs = ImGui::TableGetSortSpecs(); ImGuiTableSortSpecs* sort_specs = ImGui::TableGetSortSpecs();
if (sorts_specs && sorts_specs->SpecsDirty) if (sort_specs && sort_specs->SpecsDirty)
items_need_sort = true; items_need_sort = true;
if (sorts_specs && items_need_sort && items.Size > 1) if (sort_specs && items_need_sort && items.Size > 1)
{ {
MyItem::s_current_sort_specs = sorts_specs; // Store in variable accessible by the sort function. MyItem::SortWithSortSpecs(sort_specs, items.Data, items.Size);
qsort(&items[0], (size_t)items.Size, sizeof(items[0]), MyItem::CompareWithSortSpecs); sort_specs->SpecsDirty = false;
MyItem::s_current_sort_specs = NULL;
sorts_specs->SpecsDirty = false;
} }
items_need_sort = false; items_need_sort = false;