ImGui file list

GUI_FileList_Function.cpp

std::vector<String> excludedExtensions = {
    ".exe",
    ".dll",
    ".bat",
    ".ini",
    ".layout",
    ".ilk",
    ".lib",
    ".pdb",
};

void GUI_AssetBrowserView::ShowDirectory(const Urho3D::String& path, const Urho3D::StringVector& content, ImGuiTextFilter* filter, bool asDetail)
{
    auto imElem = BlockExe::GetInst()->GetImGuiElem();

    float contentWidth = ImGui::GetContentRegionAvailWidth();
    float contentHeight = ImGui::GetContentRegionAvail().y;

    ImGui::BeginChild("##ContentRegion", { contentWidth, contentHeight }, true);

    const float w = contentWidth;
    const float itemSize = asDetail ? 48 : 128;
    
    int index = 0;
    int columns = contentWidth / (asDetail ? 256 : 128);
    columns = columns < 1 ? 1 : columns;

    float curX = 0.0f;
    ImGui::Columns(columns, nullptr, false);

    static String assetPopupPath;

    for (size_t i = 0; i < content.Size(); ++i)
    {
        String item = content[i];
        String itemPath = path + "/" + item;
        if (item == "." || item == "..")
            continue;
        bool cancel = false;
        for (auto exclude : excludedExtensions)
            if (item.EndsWith(exclude))
                cancel = true;
        if (cancel)
            continue;

        if (!filter->PassFilter(item.CString()))
            continue;

        ImGui::PushID(i);

        // filtering makes this really really tricky to cache
        Urho3D::SharedPtr<Texture2D> thumb = GetImage(itemPath);
        
        auto filName = GetFileNameAndExtension(item);

        ImGui::BeginGroup();
        ImGui::ImageButton(thumb.Get(), { itemSize - 20, itemSize - 16 });// , { 0, 1 }, { 1,0 });
        if (ImGui::IsMouseDoubleClicked(0) && ImGui::IsItemHovered()) // change target directory
        {
            if (IsFile(itemPath))
            {
                if (!DocumentManager::Get()->OpenPath(itemPath))
                    BlockExe::GetInst()->GetContext()->GetSubsystem<FileSystem>()->SystemOpen(itemPath);
            }
            else
                directory_ = itemPath;
        }
        else if (ImGui::IsMouseClicked(1) && ImGui::IsItemHovered())
        {
            ImGui::OpenPopup("##asset_browser_popup");
            assetPopupPath = itemPath;
        }
        else if (ImGui::IsItemHovered() && asDetail && filName.Contains('.'))
        {
            ImGui::BeginTooltip();
            ImGui::Image(thumb.Get(), { 128, 128 });
            ImGui::EndTooltip();
        }

        if (ImGui::BeginPopup("##asset_browser_popup"))
        {
            auto ext = Urho3D::GetExtension(assetPopupPath);
            auto found = fileHandlers_.Find(ext);
            if (found != fileHandlers_.End())
                found->second_(assetPopupPath);
            else
            {
                if (ImGui::MenuItem(ICON_FA_EDIT " Open (system)"))
                    BlockExe::GetInst()->GetSubsystem<FileSystem>()->SystemOpen(assetPopupPath);
            }

            // Script extension point
            auto& eventData = BlockExe::GetInst()->GetEventDataMap();
            eventData["SelectedAssetPath"] = assetPopupPath;
            eventData["SelectedAssetExt"] = ext;
            if (ext == ".xml")
            {
                XMLFile file(BlockExe::GetInst()->GetContext());
                if (file.LoadFile(assetPopupPath))
                    eventData["XmlRoot"] = file.GetRoot().GetName().ToLower();
            }
            BlockExe::GetInst()->SendEvent("ASSET_BROWSER_CONTEXT", eventData);

            ImGui::EndPopup();
        }

        if (asDetail)
            ImGui::SameLine();
        ImGui::TextWrapped(filName.CString());
        if (ImGui::IsItemHovered() && !asDetail)
            ImGui::SetTooltip(filName.CString());
        ImGui::EndGroup();
        if (!ImGui::IsPopupOpen((ImGuiID)0) && ImGui::BeginDragDropSource(ImGuiDragDropFlags_SourceAllowNullID))
        {
            if (std::find(recentDirectories_.begin(), recentDirectories_.end(), directory_) == recentDirectories_.end())
                recentDirectories_.insert(recentDirectories_.begin(), directory_);

            ImGui::SetDragDropPayload("U_RES", itemPath.CString(), itemPath.Length());
            ImGui::Image(thumb.Get(), { 128, 128 });
            ImGui::Text(filName.CString());
            ImGui::EndDragDropSource();
        }

        ImGui::PopID();
        ImGui::NextColumn();
    }

    ImGui::EndChild();
}