Handle checkbox toggle

Signed-off-by: TheKodeToad <TheKodeToad@proton.me>

launcher/ui/pages/modplatform/ModModel.cpp

@@ -44,7 +44,7 @@ ResourceAPI::SearchArgs ModModel::createSearchArguments()
     };
 }
 
-ResourceAPI::VersionSearchArgs ModModel::createVersionsArguments(QModelIndex& entry)
+ResourceAPI::VersionSearchArgs ModModel::createVersionsArguments(const QModelIndex& entry)
 {
     auto& pack = *m_packs[entry.row()];
     auto profile = static_cast<MinecraftInstance const&>(m_base_instance).getPackProfile();
@@ -62,7 +62,7 @@ ResourceAPI::VersionSearchArgs ModModel::createVersionsArguments(QModelIndex& en
     return { pack, versions, loaders };
 }
 
-ResourceAPI::ProjectInfoArgs ModModel::createInfoArguments(QModelIndex& entry)
+ResourceAPI::ProjectInfoArgs ModModel::createInfoArguments(const QModelIndex& entry)
 {
     auto& pack = *m_packs[entry.row()];
     return { pack };

launcher/ui/pages/modplatform/ModModel.h

@@ -39,8 +39,8 @@ class ModModel : public ResourceModel {
 
    public slots:
     ResourceAPI::SearchArgs createSearchArguments() override;
-    ResourceAPI::VersionSearchArgs createVersionsArguments(QModelIndex&) override;
+    ResourceAPI::VersionSearchArgs createVersionsArguments(const QModelIndex&) override;
-    ResourceAPI::ProjectInfoArgs createInfoArguments(QModelIndex&) override;
+    ResourceAPI::ProjectInfoArgs createInfoArguments(const QModelIndex&) override;
 
    protected:
     auto documentToArray(QJsonDocument& obj) const -> QJsonArray override = 0;

launcher/ui/pages/modplatform/ModPage.cpp

@@ -59,7 +59,6 @@ namespace ResourceDownload {
 ModPage::ModPage(ModDownloadDialog* dialog, BaseInstance& instance) : ResourcePage(dialog, instance)
 {
     connect(m_ui->resourceFilterButton, &QPushButton::clicked, this, &ModPage::filterMods);
-    connect(m_ui->packView, &QListView::doubleClicked, this, &ModPage::onResourceSelected);
 }
 
 void ModPage::setFilterWidget(unique_qobject_ptr<ModFilterWidget>& widget)

launcher/ui/pages/modplatform/ModPage.h

@@ -35,7 +35,7 @@ class ModPage : public ResourcePage {
         page->setFilterWidget(filter_widget);
         model->setFilter(page->getFilter());
 
-        connect(model, &ResourceModel::versionListUpdated, page, &ResourcePage::updateVersionList);
+        connect(model, &ResourceModel::versionListUpdated, page, &ResourcePage::versionListUpdated);
         connect(model, &ResourceModel::projectInfoUpdated, page, &ResourcePage::updateUi);
 
         return page;

launcher/ui/pages/modplatform/ResourceModel.cpp

@@ -192,7 +192,7 @@ void ResourceModel::search()
         runSearchJob(job);
 }
 
-void ResourceModel::loadEntry(QModelIndex& entry)
+void ResourceModel::loadEntry(const QModelIndex& entry)
 {
     auto const& pack = m_packs[entry.row()];
 
@@ -503,7 +503,7 @@ void ResourceModel::versionRequestSucceeded(QJsonDocument& doc, ModPlatform::Ind
         return;
     }
 
-    emit versionListUpdated();
+    emit versionListUpdated(index);
 }
 
 void ResourceModel::infoRequestSucceeded(QJsonDocument& doc, ModPlatform::IndexedPack& pack, const QModelIndex& index)
@@ -530,7 +530,7 @@ void ResourceModel::infoRequestSucceeded(QJsonDocument& doc, ModPlatform::Indexe
         return;
     }
 
-    emit projectInfoUpdated();
+    emit projectInfoUpdated(index);
 }
 
 void ResourceModel::addPack(ModPlatform::IndexedPack::Ptr pack,

launcher/ui/pages/modplatform/ResourceModel.h

@@ -80,17 +80,17 @@ class ResourceModel : public QAbstractListModel {
     virtual ResourceAPI::SearchArgs createSearchArguments() = 0;
     virtual ResourceAPI::SearchCallbacks createSearchCallbacks() { return {}; }
 
-    virtual ResourceAPI::VersionSearchArgs createVersionsArguments(QModelIndex&) = 0;
+    virtual ResourceAPI::VersionSearchArgs createVersionsArguments(const QModelIndex&) = 0;
-    virtual ResourceAPI::VersionSearchCallbacks createVersionsCallbacks(QModelIndex&) { return {}; }
+    virtual ResourceAPI::VersionSearchCallbacks createVersionsCallbacks(const QModelIndex&) { return {}; }
 
-    virtual ResourceAPI::ProjectInfoArgs createInfoArguments(QModelIndex&) = 0;
+    virtual ResourceAPI::ProjectInfoArgs createInfoArguments(const QModelIndex&) = 0;
-    virtual ResourceAPI::ProjectInfoCallbacks createInfoCallbacks(QModelIndex&) { return {}; }
+    virtual ResourceAPI::ProjectInfoCallbacks createInfoCallbacks(const QModelIndex&) { return {}; }
 
     /** Requests the API for more entries. */
     virtual void search();
 
     /** Applies any processing / extra requests needed to fully load the specified entry's information. */
-    virtual void loadEntry(QModelIndex&);
+    virtual void loadEntry(const QModelIndex&);
 
     /** Schedule a refresh, clearing the current state. */
     void refresh();
@@ -170,8 +170,8 @@ class ResourceModel : public QAbstractListModel {
     void infoRequestSucceeded(QJsonDocument&, ModPlatform::IndexedPack&, const QModelIndex&);
 
    signals:
-    void versionListUpdated();
+    void versionListUpdated(const QModelIndex& index);
-    void projectInfoUpdated();
+    void projectInfoUpdated(const QModelIndex& index);
 };
 
 }  // namespace ResourceDownload

launcher/ui/pages/modplatform/ResourcePackModel.cpp

@@ -20,13 +20,13 @@ ResourceAPI::SearchArgs ResourcePackResourceModel::createSearchArguments()
     return { ModPlatform::ResourceType::RESOURCE_PACK, m_next_search_offset, m_search_term, sort };
 }
 
-ResourceAPI::VersionSearchArgs ResourcePackResourceModel::createVersionsArguments(QModelIndex& entry)
+ResourceAPI::VersionSearchArgs ResourcePackResourceModel::createVersionsArguments(const QModelIndex& entry)
 {
     auto& pack = m_packs[entry.row()];
     return { *pack };
 }
 
-ResourceAPI::ProjectInfoArgs ResourcePackResourceModel::createInfoArguments(QModelIndex& entry)
+ResourceAPI::ProjectInfoArgs ResourcePackResourceModel::createInfoArguments(const QModelIndex& entry)
 {
     auto& pack = m_packs[entry.row()];
     return { *pack };

launcher/ui/pages/modplatform/ResourcePackModel.h

@@ -31,8 +31,8 @@ class ResourcePackResourceModel : public ResourceModel {
 
    public slots:
     ResourceAPI::SearchArgs createSearchArguments() override;
-    ResourceAPI::VersionSearchArgs createVersionsArguments(QModelIndex&) override;
+    ResourceAPI::VersionSearchArgs createVersionsArguments(const QModelIndex&) override;
-    ResourceAPI::ProjectInfoArgs createInfoArguments(QModelIndex&) override;
+    ResourceAPI::ProjectInfoArgs createInfoArguments(const QModelIndex&) override;
 
    protected:
     const BaseInstance& m_base_instance;

launcher/ui/pages/modplatform/ResourcePackPage.cpp

@@ -14,9 +14,7 @@
 namespace ResourceDownload {
 
 ResourcePackResourcePage::ResourcePackResourcePage(ResourceDownloadDialog* dialog, BaseInstance& instance) : ResourcePage(dialog, instance)
-{
+{}
-    connect(m_ui->packView, &QListView::doubleClicked, this, &ResourcePackResourcePage::onResourceSelected);
-}
 
 /******** Callbacks to events in the UI (set up in the derived classes) ********/
 

launcher/ui/pages/modplatform/ResourcePackPage.h

@@ -25,7 +25,7 @@ class ResourcePackResourcePage : public ResourcePage {
         auto page = new T(dialog, instance);
         auto model = static_cast<ResourcePackResourceModel*>(page->getModel());
 
-        connect(model, &ResourceModel::versionListUpdated, page, &ResourcePage::updateVersionList);
+        connect(model, &ResourceModel::versionListUpdated, page, &ResourcePage::versionListUpdated);
         connect(model, &ResourceModel::projectInfoUpdated, page, &ResourcePage::updateUi);
 
         return page;

launcher/ui/pages/modplatform/ResourcePage.cpp

@@ -78,10 +78,14 @@ ResourcePage::ResourcePage(ResourceDownloadDialog* parent, BaseInstance& base_in
 
     m_ui->verticalLayout->insertWidget(1, &m_fetchProgress);
 
-    m_ui->packView->setItemDelegate(new ProjectItemDelegate(this));
+    auto delegate = new ProjectItemDelegate(this);
+    m_ui->packView->setItemDelegate(delegate);
     m_ui->packView->installEventFilter(this);
 
     connect(m_ui->packDescription, &QTextBrowser::anchorClicked, this, &ResourcePage::openUrl);
+
+    connect(m_ui->packView, &QListView::doubleClicked, this, &ResourcePage::onToggle);
+    connect(delegate, &ProjectItemDelegate::checkboxClicked, this, &ResourcePage::onToggle);
 }
 
 ResourcePage::~ResourcePage()
@@ -177,8 +181,11 @@ ModPlatform::IndexedPack::Ptr ResourcePage::getCurrentPack() const
     return m_model->data(m_ui->packView->currentIndex(), Qt::UserRole).value<ModPlatform::IndexedPack::Ptr>();
 }
 
-void ResourcePage::updateUi()
+void ResourcePage::updateUi(const QModelIndex& index)
 {
+    if (index != m_ui->packView->currentIndex())
+        return;
+
     auto current_pack = getCurrentPack();
     if (!current_pack) {
         m_ui->packDescription->setHtml({});
@@ -268,39 +275,48 @@ void ResourcePage::updateSelectionButton()
     }
 }
 
-void ResourcePage::updateVersionList()
+void ResourcePage::versionListUpdated(const QModelIndex& index)
 {
-    auto current_pack = getCurrentPack();
+    if (index == m_ui->packView->currentIndex()) {
+        auto current_pack = getCurrentPack();
 
-    m_ui->versionSelectionBox->blockSignals(true);
+        m_ui->versionSelectionBox->blockSignals(true);
-    m_ui->versionSelectionBox->clear();
+        m_ui->versionSelectionBox->clear();
-    m_ui->versionSelectionBox->blockSignals(false);
+        m_ui->versionSelectionBox->blockSignals(false);
 
-    if (current_pack) {
+        if (current_pack) {
-        auto installedVersion = m_model->getInstalledPackVersion(current_pack);
+            auto installedVersion = m_model->getInstalledPackVersion(current_pack);
 
-        for (int i = 0; i < current_pack->versions.size(); i++) {
+            for (int i = 0; i < current_pack->versions.size(); i++) {
-            auto& version = current_pack->versions[i];
+                auto& version = current_pack->versions[i];
-            if (!m_model->checkVersionFilters(version))
+                if (!m_model->checkVersionFilters(version))
-                continue;
+                    continue;
 
-            auto versionText = version.version;
+                auto versionText = version.version;
-            if (version.version_type.isValid()) {
+                if (version.version_type.isValid()) {
-                versionText += QString(" [%1]").arg(version.version_type.toString());
+                    versionText += QString(" [%1]").arg(version.version_type.toString());
+                }
+                if (version.fileId == installedVersion) {
+                    versionText += tr(" [installed]", "Mod version select");
+                }
+
+                m_ui->versionSelectionBox->addItem(versionText, QVariant(i));
             }
-            if (version.fileId == installedVersion) {
-                versionText += tr(" [installed]", "Mod version select");
-            }
-
-            m_ui->versionSelectionBox->addItem(versionText, QVariant(i));
         }
-    }
+        if (m_ui->versionSelectionBox->count() == 0) {
-    if (m_ui->versionSelectionBox->count() == 0) {
+            m_ui->versionSelectionBox->addItem(tr("No valid version found."), QVariant(-1));
-        m_ui->versionSelectionBox->addItem(tr("No valid version found."), QVariant(-1));
+            m_ui->resourceSelectionButton->setText(tr("Cannot select invalid version :("));
-        m_ui->resourceSelectionButton->setText(tr("Cannot select invalid version :("));
+        }
-    }
 
-    updateSelectionButton();
+        if (m_enableQueue.contains(index.row())) {
+            m_enableQueue.remove(index.row());
+            onToggle(index);
+        } else
+            updateSelectionButton();
+    } else if (m_enableQueue.contains(index.row())) {
+        m_enableQueue.remove(index.row());
+        onToggle(index);
+    }
 }
 
 void ResourcePage::onSelectionChanged(QModelIndex curr, [[maybe_unused]] QModelIndex prev)
@@ -318,16 +334,20 @@ void ResourcePage::onSelectionChanged(QModelIndex curr, [[maybe_unused]] QModelI
 
         request_load = true;
     } else {
-        updateVersionList();
+        versionListUpdated(curr);
     }
 
     if (current_pack && !current_pack->extraDataLoaded)
         request_load = true;
 
+    // we are already requesting this
+    if (m_enableQueue.contains(curr.row()))
+        request_load = false;
+
     if (request_load)
         m_model->loadEntry(curr);
 
-    updateUi();
+    updateUi(curr);
 }
 
 void ResourcePage::onVersionSelectionChanged(int index)
@@ -385,6 +405,41 @@ void ResourcePage::onResourceSelected()
     m_ui->packView->repaint();
 }
 
+void ResourcePage::onToggle(const QModelIndex& index)
+{
+    const bool is_selected = index == m_ui->packView->currentIndex();
+    auto pack = m_model->data(index, Qt::UserRole).value<ModPlatform::IndexedPack::Ptr>();
+
+    if (pack->versionsLoaded) {
+        if (pack->isAnyVersionSelected())
+            removeResourceFromDialog(pack->name);
+        else {
+            auto version = std::find_if(pack->versions.begin(), pack->versions.end(), [this](const ModPlatform::IndexedVersion& version) {
+                return m_model->checkVersionFilters(version);
+            });
+
+            if (version != pack->versions.end())
+                addResourceToDialog(pack, *version);
+        }
+
+        if (is_selected)
+            updateSelectionButton();
+
+        // force update
+        QVariant variant;
+        variant.setValue(pack);
+        m_model->setData(index, variant, Qt::UserRole);
+    } else {
+        // the model is just 1 dimensional so this is fine
+        m_enableQueue.insert(index.row());
+
+        // we can't be sure that this hasn't already been requested...
+        // but this does the job well enough and there's not much point preventing edgecases
+        if (!is_selected)
+            m_model->loadEntry(index);
+    }
+}
+
 void ResourcePage::openUrl(const QUrl& url)
 {
     // do not allow other url schemes for security reasons

launcher/ui/pages/modplatform/ResourcePage.h

@@ -71,9 +71,9 @@ class ResourcePage : public QWidget, public BasePage {
     void addSortings();
 
    public slots:
-    virtual void updateUi();
+    virtual void updateUi(const QModelIndex& index);
     virtual void updateSelectionButton();
-    virtual void updateVersionList();
+    virtual void versionListUpdated(const QModelIndex& index);
 
     void addResourceToDialog(ModPlatform::IndexedPack::Ptr, ModPlatform::IndexedVersion&);
     void removeResourceFromDialog(const QString& pack_name);
@@ -91,6 +91,7 @@ class ResourcePage : public QWidget, public BasePage {
     void onSelectionChanged(QModelIndex first, QModelIndex second);
     void onVersionSelectionChanged(int index);
     void onResourceSelected();
+    void onToggle(const QModelIndex& index);
 
     // NOTE: Can't use [[nodiscard]] here because of https://bugreports.qt.io/browse/QTBUG-58628 on Qt 5.12
 
@@ -115,6 +116,8 @@ class ResourcePage : public QWidget, public BasePage {
     QTimer m_searchTimer;
 
     bool m_doNotJumpToMod = false;
+
+    QSet<int> m_enableQueue;
 };
 
 }  // namespace ResourceDownload

launcher/ui/pages/modplatform/ShaderPackModel.cpp

@@ -20,13 +20,13 @@ ResourceAPI::SearchArgs ShaderPackResourceModel::createSearchArguments()
     return { ModPlatform::ResourceType::SHADER_PACK, m_next_search_offset, m_search_term, sort };
 }
 
-ResourceAPI::VersionSearchArgs ShaderPackResourceModel::createVersionsArguments(QModelIndex& entry)
+ResourceAPI::VersionSearchArgs ShaderPackResourceModel::createVersionsArguments(const QModelIndex& entry)
 {
     auto& pack = m_packs[entry.row()];
     return { *pack };
 }
 
-ResourceAPI::ProjectInfoArgs ShaderPackResourceModel::createInfoArguments(QModelIndex& entry)
+ResourceAPI::ProjectInfoArgs ShaderPackResourceModel::createInfoArguments(const QModelIndex& entry)
 {
     auto& pack = m_packs[entry.row()];
     return { *pack };

launcher/ui/pages/modplatform/ShaderPackModel.h

@@ -31,8 +31,8 @@ class ShaderPackResourceModel : public ResourceModel {
 
    public slots:
     ResourceAPI::SearchArgs createSearchArguments() override;
-    ResourceAPI::VersionSearchArgs createVersionsArguments(QModelIndex&) override;
+    ResourceAPI::VersionSearchArgs createVersionsArguments(const QModelIndex&) override;
-    ResourceAPI::ProjectInfoArgs createInfoArguments(QModelIndex&) override;
+    ResourceAPI::ProjectInfoArgs createInfoArguments(const QModelIndex&) override;
 
    protected:
     const BaseInstance& m_base_instance;

launcher/ui/pages/modplatform/ShaderPackPage.cpp

@@ -15,10 +15,7 @@
 
 namespace ResourceDownload {
 
-ShaderPackResourcePage::ShaderPackResourcePage(ShaderPackDownloadDialog* dialog, BaseInstance& instance) : ResourcePage(dialog, instance)
+ShaderPackResourcePage::ShaderPackResourcePage(ShaderPackDownloadDialog* dialog, BaseInstance& instance) : ResourcePage(dialog, instance) {}
-{
-    connect(m_ui->packView, &QListView::doubleClicked, this, &ShaderPackResourcePage::onResourceSelected);
-}
 
 /******** Callbacks to events in the UI (set up in the derived classes) ********/
 

launcher/ui/pages/modplatform/ShaderPackPage.h

@@ -25,7 +25,7 @@ class ShaderPackResourcePage : public ResourcePage {
         auto page = new T(dialog, instance);
         auto model = static_cast<ShaderPackResourceModel*>(page->getModel());
 
-        connect(model, &ResourceModel::versionListUpdated, page, &ResourcePage::updateVersionList);
+        connect(model, &ResourceModel::versionListUpdated, page, &ResourcePage::versionListUpdated);
         connect(model, &ResourceModel::projectInfoUpdated, page, &ResourcePage::updateUi);
 
         return page;

launcher/ui/pages/modplatform/TexturePackModel.cpp

@@ -70,7 +70,7 @@ ResourceAPI::SearchArgs TexturePackResourceModel::createSearchArguments()
     return args;
 }
 
-ResourceAPI::VersionSearchArgs TexturePackResourceModel::createVersionsArguments(QModelIndex& entry)
+ResourceAPI::VersionSearchArgs TexturePackResourceModel::createVersionsArguments(const QModelIndex& entry)
 {
     auto args = ResourcePackResourceModel::createVersionsArguments(entry);
     if (!m_version_list->isLoaded()) {

launcher/ui/pages/modplatform/TexturePackModel.h

@@ -18,7 +18,7 @@ class TexturePackResourceModel : public ResourcePackResourceModel {
     [[nodiscard]] inline ::Version maximumTexturePackVersion() const { return { "1.6" }; }
 
     ResourceAPI::SearchArgs createSearchArguments() override;
-    ResourceAPI::VersionSearchArgs createVersionsArguments(QModelIndex&) override;
+    ResourceAPI::VersionSearchArgs createVersionsArguments(const QModelIndex&) override;
 
    protected:
     Meta::VersionList::Ptr m_version_list;

launcher/ui/pages/modplatform/TexturePackPage.h

@@ -27,7 +27,7 @@ class TexturePackResourcePage : public ResourcePackResourcePage {
         auto page = new T(dialog, instance);
         auto model = static_cast<TexturePackResourceModel*>(page->getModel());
 
-        connect(model, &ResourceModel::versionListUpdated, page, &ResourcePage::updateVersionList);
+        connect(model, &ResourceModel::versionListUpdated, page, &ResourcePage::versionListUpdated);
         connect(model, &ResourceModel::projectInfoUpdated, page, &ResourcePage::updateUi);
 
         return page;
@@ -39,10 +39,7 @@ class TexturePackResourcePage : public ResourcePackResourcePage {
     [[nodiscard]] inline QString resourceString() const override { return tr("texture pack"); }
 
    protected:
-    TexturePackResourcePage(TexturePackDownloadDialog* dialog, BaseInstance& instance) : ResourcePackResourcePage(dialog, instance)
+    TexturePackResourcePage(TexturePackDownloadDialog* dialog, BaseInstance& instance) : ResourcePackResourcePage(dialog, instance) {}
-    {
-        connect(m_ui->packView, &QListView::doubleClicked, this, &TexturePackResourcePage::onResourceSelected);
-    }
 };
 
 }  // namespace ResourceDownload

launcher/ui/pages/modplatform/flame/FlameResourceModels.cpp

@@ -122,7 +122,7 @@ ResourceAPI::SearchArgs FlameTexturePackModel::createSearchArguments()
     return args;
 }
 
-ResourceAPI::VersionSearchArgs FlameTexturePackModel::createVersionsArguments(QModelIndex& entry)
+ResourceAPI::VersionSearchArgs FlameTexturePackModel::createVersionsArguments(const QModelIndex& entry)
 {
     auto args = TexturePackResourceModel::createVersionsArguments(entry);
 

launcher/ui/pages/modplatform/flame/FlameResourceModels.h

@@ -69,7 +69,7 @@ class FlameTexturePackModel : public TexturePackResourceModel {
     void loadIndexedPackVersions(ModPlatform::IndexedPack& m, QJsonArray& arr) override;
 
     ResourceAPI::SearchArgs createSearchArguments() override;
-    ResourceAPI::VersionSearchArgs createVersionsArguments(QModelIndex&) override;
+    ResourceAPI::VersionSearchArgs createVersionsArguments(const QModelIndex&) override;
 
     auto documentToArray(QJsonDocument& obj) const -> QJsonArray override;
 };

launcher/ui/widgets/ProjectItem.cpp

@@ -16,34 +16,20 @@ void ProjectItemDelegate::paint(QPainter* painter, const QStyleOptionViewItem& o
     QStyleOptionViewItem opt(option);
     initStyleOption(&opt, index);
 
-    auto rect = opt.rect;
-
     const QStyle* style = opt.widget == nullptr ? QApplication::style() : opt.widget->style();
 
+    auto rect = opt.rect;
+
     style->drawPrimitive(QStyle::PE_PanelItemViewItem, &opt, painter, opt.widget);
 
     if (option.state & QStyle::State_Selected)
         painter->setPen(opt.palette.highlightedText().color());
 
     if (opt.features & QStyleOptionViewItem::HasCheckIndicator) {
-        // 5px will be the typical margin with 48px icon size
+        QStyleOptionViewItem checkboxOpt = makeCheckboxStyleOption(opt, style);
-        // we don't want the checkbox to be all over the place
-        rect.translate(5, 0);
-
-        QStyleOptionViewItem checkboxOpt = opt;
-
-        checkboxOpt.state &= ~QStyle::State_HasFocus;
-
-        if (checkboxOpt.checkState == Qt::Checked)
-            checkboxOpt.state |= QStyle::State_On;
-
-        QRect checkboxRect = style->subElementRect(QStyle::SE_ItemViewItemCheckIndicator, &checkboxOpt, opt.widget);
-        checkboxOpt.rect =
-            QRect(rect.x(), rect.y() + (rect.height() / 2 - checkboxRect.height() / 2), checkboxRect.width(), checkboxRect.height());
-
         style->drawPrimitive(QStyle::PE_IndicatorItemViewItemCheck, &checkboxOpt, painter, opt.widget);
 
-        rect.setX(rect.x() + checkboxRect.width());
+        rect.setX(checkboxOpt.rect.right());
     }
 
     // The default icon size will be a square (and height is usually the lower value).
@@ -141,3 +127,51 @@ void ProjectItemDelegate::paint(QPainter* painter, const QStyleOptionViewItem& o
 
     painter->restore();
 }
+
+bool ProjectItemDelegate::editorEvent(QEvent* event,
+                                      QAbstractItemModel* model,
+                                      const QStyleOptionViewItem& option,
+                                      const QModelIndex& index)
+{
+    if (!(event->type() == QEvent::MouseButtonRelease || event->type() == QEvent::MouseButtonPress ||
+          event->type() == QEvent::MouseButtonDblClick))
+        return false;
+
+    auto mouseEvent = (QMouseEvent*)event;
+
+    QStyleOptionViewItem opt(option);
+    initStyleOption(&opt, index);
+
+    const QStyle* style = opt.widget == nullptr ? QApplication::style() : opt.widget->style();
+
+    const QStyleOptionViewItem checkboxOpt = makeCheckboxStyleOption(opt, style);
+
+    if (!checkboxOpt.rect.contains(mouseEvent->x(), mouseEvent->y()))
+        return false;
+
+    // swallow other events
+    // (prevents item being selected or double click action triggering)
+    if (event->type() != QEvent::MouseButtonRelease)
+        return true;
+
+    emit checkboxClicked(index);
+    return true;
+}
+
+QStyleOptionViewItem ProjectItemDelegate::makeCheckboxStyleOption(const QStyleOptionViewItem& opt, const QStyle* style) const
+{
+    QStyleOptionViewItem checkboxOpt = opt;
+
+    checkboxOpt.state &= ~QStyle::State_HasFocus;
+
+    if (checkboxOpt.checkState == Qt::Checked)
+        checkboxOpt.state |= QStyle::State_On;
+
+    QRect checkboxRect = style->subElementRect(QStyle::SE_ItemViewItemCheckIndicator, &checkboxOpt, opt.widget);
+    // 5px is the typical top margin for image
+    // we don't want the checkboxes to be all over the place :)
+    checkboxOpt.rect = QRect(opt.rect.x() + 5, opt.rect.y() + (opt.rect.height() / 2 - checkboxRect.height() / 2), checkboxRect.width(),
+                             checkboxRect.height());
+
+    return checkboxOpt;
+}

launcher/ui/widgets/ProjectItem.h

@@ -6,7 +6,7 @@
 enum UserDataTypes {
     TITLE = 257,        // QString
     DESCRIPTION = 258,  // QString
-    INSTALLED = 260     // bool
+    INSTALLED = 259     // bool
 };
 
 /** This is an item delegate composed of:
@@ -21,4 +21,12 @@ class ProjectItemDelegate final : public QStyledItemDelegate {
     ProjectItemDelegate(QWidget* parent);
 
     void paint(QPainter*, const QStyleOptionViewItem&, const QModelIndex&) const override;
+
+    bool editorEvent(QEvent* event, QAbstractItemModel* model, const QStyleOptionViewItem& option, const QModelIndex& index) override;
+
+   signals:
+    void checkboxClicked(const QModelIndex& index);
+
+   private:
+    QStyleOptionViewItem makeCheckboxStyleOption(const QStyleOptionViewItem& opt, const QStyle* style) const;
 };

tests/ResourceModel_test.cpp

@@ -43,8 +43,8 @@ class DummyResourceModel : public ResourceModel {
     [[nodiscard]] auto metaEntryBase() const -> QString override { return ""; }
 
     ResourceAPI::SearchArgs createSearchArguments() override { return {}; }
-    ResourceAPI::VersionSearchArgs createVersionsArguments(QModelIndex&) override { return {}; }
+    ResourceAPI::VersionSearchArgs createVersionsArguments(const QModelIndex&) override { return {}; }
-    ResourceAPI::ProjectInfoArgs createInfoArguments(QModelIndex&) override { return {}; }
+    ResourceAPI::ProjectInfoArgs createInfoArguments(const QModelIndex&) override { return {}; }
 
     QJsonArray documentToArray(QJsonDocument& doc) const override { return doc.object().value("hits").toArray(); }