Method DoFileTypesDropdown

Src/FileDialog.cpp:1809–1872

void FileDialog::DoFileTypesDropdown(bool supportMultipleTypes)
{
	const ImGuiStyle& style = ImGui::GetStyle();
	float dropdownWidth = Gutil::GetUIParamScaled(140.0f, 2.5f);
	dropdownWidth += style.ItemSpacing.x;

	ImGui::SetNextItemWidth(dropdownWidth);

	// The GetWindowContentRegionMax is OK here since width was fixed to a specific size before the Begin call.
	ImGui::SetCursorPosX(ImGui::GetWindowContentRegionMax().x - dropdownWidth);

	// Nothing selected means all types used.
	bool anySelected = FileTypes.AnySelected();
	bool allTypes = supportMultipleTypes && !anySelected;
	tString currChosen;
	if (supportMultipleTypes)
	{
		currChosen = allTypes ? "All Types" : FileTypes.GetSelectedString(tSystem::tFileTypes::Separator::CommaSpace, 4);
	}
	else
	{
		if (!anySelected)
		{
			FileTypes.First()->Selected = true;
			InvalidateAllNodeContent();
		}
		currChosen = FileTypes.GetSelectedString(tSystem::tFileTypes::Separator::CommaSpace, 4);
	}

	if (ImGui::BeginCombo("##TypeFilter", currChosen.Chr(), ImGuiComboFlags_HeightLarge))
	{
		if (supportMultipleTypes && ImGui::Selectable("All Types", allTypes))
		{
			FileTypes.ClearSelected();
			InvalidateAllNodeContent();
		}

		for (tFileTypes::tFileTypeItem* typeItem = FileTypes.First(); typeItem; typeItem = typeItem->Next())
		{
			tFileType fileType = typeItem->FileType;
			tString fileTypeName = tSystem::tGetFileTypeName(fileType);
			if (fileTypeName.IsEmpty())
				continue;

			if (ImGui::Selectable(fileTypeName.Chr(), typeItem->Selected))
			{
				if (!supportMultipleTypes)
				{
					FileTypes.ClearSelected();
					typeItem->Selected = true;
				}
				else
					typeItem->Selected = !typeItem->Selected;
				InvalidateAllNodeContent();
			}

			if (typeItem->Selected)
				ImGui::SetItemDefaultFocus();