refactor: create mod pages and filter widget by factory methods

This takes most expensive operations out of the constructors.

Signed-off-by: flow <flowlnlnln@gmail.com>

launcher/ui/dialogs/ModDownloadDialog.cpp

@@ -121,9 +121,9 @@ QList<BasePage *> ModDownloadDialog::getPages()
 {
     QList<BasePage *> pages;
 
-    pages.append(new ModrinthModPage(this, m_instance));
+    pages.append(ModrinthModPage::create(this, m_instance));
     if (APPLICATION->currentCapabilities() & Application::SupportsFlame)
-        pages.append(new FlameModPage(this, m_instance));
+        pages.append(FlameModPage::create(this, m_instance));
 
     return pages;
 }

launcher/ui/pages/modplatform/ModPage.cpp

@@ -44,12 +44,12 @@
 #include "minecraft/PackProfile.h"
 #include "ui/dialogs/ModDownloadDialog.h"
 
+
 ModPage::ModPage(ModDownloadDialog* dialog, BaseInstance* instance, ModAPI* api)
     : QWidget(dialog)
     , m_instance(instance)
     , ui(new Ui::ModPage)
     , dialog(dialog)
-    , filter_widget(static_cast<MinecraftInstance*>(instance)->getPackProfile()->getComponentVersion("net.minecraft"), this)
     , api(api)
 {
     ui->setupUi(this);
@@ -59,18 +59,6 @@ ModPage::ModPage(ModDownloadDialog* dialog, BaseInstance* instance, ModAPI* api)
 
     ui->versionSelectionBox->view()->setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
     ui->versionSelectionBox->view()->parentWidget()->setMaximumHeight(300);
-
-    ui->gridLayout_3->addWidget(&filter_widget, 0, 0, 1, ui->gridLayout_3->columnCount());
-
-    filter_widget.setInstance(static_cast<MinecraftInstance*>(m_instance));
-    m_filter = filter_widget.getFilter();
-
-    connect(&filter_widget, &ModFilterWidget::filterChanged, this, [&]{
-        ui->searchButton->setStyleSheet("text-decoration: underline");
-    });
-    connect(&filter_widget, &ModFilterWidget::filterUnchanged, this, [&]{
-        ui->searchButton->setStyleSheet("text-decoration: none");
-    });
 }
 
 ModPage::~ModPage()
@@ -78,6 +66,26 @@ ModPage::~ModPage()
     delete ui;
 }
 
+void ModPage::setFilterWidget(unique_qobject_ptr<ModFilterWidget>& widget)
+{
+    if (m_filter_widget)
+        disconnect(m_filter_widget.get(), nullptr, nullptr, nullptr);
+
+    m_filter_widget.swap(widget);
+
+    ui->gridLayout_3->addWidget(m_filter_widget.get(), 0, 0, 1, ui->gridLayout_3->columnCount());
+
+    m_filter_widget->setInstance(static_cast<MinecraftInstance*>(m_instance));
+    m_filter = m_filter_widget->getFilter();
+
+    connect(m_filter_widget.get(), &ModFilterWidget::filterChanged, this, [&]{
+        ui->searchButton->setStyleSheet("text-decoration: underline");
+    });
+    connect(m_filter_widget.get(), &ModFilterWidget::filterUnchanged, this, [&]{
+        ui->searchButton->setStyleSheet("text-decoration: none");
+    });
+}
+
 
 /******** Qt things ********/
 
@@ -105,13 +113,13 @@ auto ModPage::eventFilter(QObject* watched, QEvent* event) -> bool
 
 void ModPage::filterMods()
 {
-    filter_widget.setHidden(!filter_widget.isHidden());
+    m_filter_widget->setHidden(!m_filter_widget->isHidden());
 }
 
 void ModPage::triggerSearch()
 {
-    auto changed = filter_widget.changed();
+    auto changed = m_filter_widget->changed();
-    m_filter = filter_widget.getFilter();
+    m_filter = m_filter_widget->getFilter();
     
     if(changed){
         ui->packView->clearSelection();

launcher/ui/pages/modplatform/ModPage.h

@@ -20,7 +20,17 @@ class ModPage : public QWidget, public BasePage {
     Q_OBJECT
 
    public:
-    explicit ModPage(ModDownloadDialog* dialog, BaseInstance* instance, ModAPI* api);
+    template<typename T>
+    static T* create(ModDownloadDialog* dialog, BaseInstance* instance)
+    {
+        auto page = new T(dialog, instance);
+
+        auto filter_widget = ModFilterWidget::create(static_cast<MinecraftInstance*>(instance)->getPackProfile()->getComponentVersion("net.minecraft"), page);
+        page->setFilterWidget(filter_widget);
+
+        return page;
+    }
+
     ~ModPage() override;
 
     /* Affects what the user sees */
@@ -45,6 +55,8 @@ class ModPage : public QWidget, public BasePage {
     auto getFilter() const -> const std::shared_ptr<ModFilterWidget::Filter> { return m_filter; }
     auto getDialog() const -> const ModDownloadDialog* { return dialog; }
 
+    void setFilterWidget(unique_qobject_ptr<ModFilterWidget>&);
+
     auto getCurrent() -> ModPlatform::IndexedPack& { return current; }
     void updateModVersions(int prev_count = -1);
 
@@ -54,6 +66,7 @@ class ModPage : public QWidget, public BasePage {
     BaseInstance* m_instance;
 
    protected:
+    ModPage(ModDownloadDialog* dialog, BaseInstance* instance, ModAPI* api);
     void updateSelectionButton();
 
    protected slots:
@@ -67,7 +80,7 @@ class ModPage : public QWidget, public BasePage {
     Ui::ModPage* ui = nullptr;
     ModDownloadDialog* dialog = nullptr;
 
-    ModFilterWidget filter_widget;
+    unique_qobject_ptr<ModFilterWidget> m_filter_widget;
     std::shared_ptr<ModFilterWidget::Filter> m_filter;
 
     ModPlatform::ListModel* listModel = nullptr;

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

@@ -44,7 +44,12 @@ class FlameModPage : public ModPage {
     Q_OBJECT
 
    public:
-    explicit FlameModPage(ModDownloadDialog* dialog, BaseInstance* instance);
+    static FlameModPage* create(ModDownloadDialog* dialog, BaseInstance* instance)
+    {
+        return ModPage::create<FlameModPage>(dialog, instance);
+    }
+
+    FlameModPage(ModDownloadDialog* dialog, BaseInstance* instance);
     ~FlameModPage() override = default;
 
     inline auto displayName() const -> QString override { return "CurseForge"; }

launcher/ui/pages/modplatform/modrinth/ModrinthModPage.h

@@ -44,7 +44,12 @@ class ModrinthModPage : public ModPage {
     Q_OBJECT
 
    public:
-    explicit ModrinthModPage(ModDownloadDialog* dialog, BaseInstance* instance);
+    static ModrinthModPage* create(ModDownloadDialog* dialog, BaseInstance* instance)
+    {
+        return ModPage::create<ModrinthModPage>(dialog, instance);
+    }
+
+    ModrinthModPage(ModDownloadDialog* dialog, BaseInstance* instance);
     ~ModrinthModPage() override = default;
 
     inline auto displayName() const -> QString override { return "Modrinth"; }

launcher/ui/widgets/ModFilterWidget.cpp

@@ -3,6 +3,37 @@
 
 #include "Application.h"
 
+unique_qobject_ptr<ModFilterWidget> ModFilterWidget::create(Version default_version, QWidget* parent)
+{
+    auto filter_widget = new ModFilterWidget(default_version, parent);
+
+    if (!filter_widget->versionList()->isLoaded()) {
+        QEventLoop load_version_list_loop;
+
+        QTimer time_limit_for_list_load;
+        time_limit_for_list_load.setTimerType(Qt::TimerType::CoarseTimer);
+        time_limit_for_list_load.setSingleShot(true);
+        time_limit_for_list_load.callOnTimeout(&load_version_list_loop, &QEventLoop::quit);
+        time_limit_for_list_load.start(4000);
+
+        auto task = filter_widget->versionList()->getLoadTask();
+
+        connect(task.get(), &Task::failed, [filter_widget]{
+            filter_widget->disableVersionButton(VersionButtonID::Major, tr("failed to get version index"));
+        });
+        connect(task.get(), &Task::finished, &load_version_list_loop, &QEventLoop::quit);
+
+        if (!task->isRunning())
+            task->start();
+
+        load_version_list_loop.exec();
+        if (time_limit_for_list_load.isActive())
+            time_limit_for_list_load.stop();
+    }
+
+    return unique_qobject_ptr<ModFilterWidget>(filter_widget);
+}
+
 ModFilterWidget::ModFilterWidget(Version def, QWidget* parent)
     : QTabWidget(parent), m_filter(new Filter()),  ui(new Ui::ModFilterWidget)
 {
@@ -19,23 +50,6 @@ ModFilterWidget::ModFilterWidget(Version def, QWidget* parent)
     m_filter->versions.push_front(def);
 
     m_version_list = APPLICATION->metadataIndex()->get("net.minecraft");
-    if (!m_version_list->isLoaded()) {
-        QEventLoop load_version_list_loop;
-
-        auto task = m_version_list->getLoadTask();
-
-        connect(task.get(), &Task::failed, [this]{
-            ui->majorVersionButton->setText(tr("Major version match (failed to get version index)"));
-            disableVersionButton(VersionButtonID::Major);
-        });
-        connect(task.get(), &Task::finished, &load_version_list_loop, &QEventLoop::quit);
-
-        if (!task->isRunning())
-            task->start();
-
-        load_version_list_loop.exec();
-    }
-
     setHidden(true);
 }
 
@@ -71,24 +85,30 @@ auto ModFilterWidget::getFilter() -> std::shared_ptr<Filter>
     return m_filter;
 }
 
-void ModFilterWidget::disableVersionButton(VersionButtonID id)
+void ModFilterWidget::disableVersionButton(VersionButtonID id, QString reason)
 {
+    QAbstractButton* btn = nullptr;
+
     switch(id){
     case(VersionButtonID::Strict):
-        ui->strictVersionButton->setEnabled(false);
+        btn = ui->strictVersionButton;
         break;
     case(VersionButtonID::Major):
-        ui->majorVersionButton->setEnabled(false);
+        btn = ui->majorVersionButton;
         break;
     case(VersionButtonID::All):
-        ui->allVersionsButton->setEnabled(false);
+        btn = ui->allVersionsButton;
         break;
     case(VersionButtonID::Between):
-    //    ui->betweenVersionsButton->setEnabled(false);
-        break;
     default:
         break;
     }
+
+    if (btn) {
+        btn->setEnabled(false);
+        if (!reason.isEmpty())
+            btn->setText(btn->text() + QString(" (%1)").arg(reason));
+    }
 }
 
 void ModFilterWidget::onVersionFilterChanged(int id)

launcher/ui/widgets/ModFilterWidget.h

@@ -38,18 +38,22 @@ public:
     std::shared_ptr<Filter> m_filter;
 
 public:
-    explicit ModFilterWidget(Version def, QWidget* parent = nullptr);
+    static unique_qobject_ptr<ModFilterWidget> create(Version default_version, QWidget* parent = nullptr);
     ~ModFilterWidget();
 
     void setInstance(MinecraftInstance* instance);
 
     /// By default all buttons are enabled
-    void disableVersionButton(VersionButtonID);
+    void disableVersionButton(VersionButtonID, QString reason = {});
 
     auto getFilter() -> std::shared_ptr<Filter>;
     auto changed() const -> bool { return m_last_version_id != m_version_id; }
 
+    Meta::VersionListPtr versionList() { return m_version_list; }
+
 private:
+    ModFilterWidget(Version def, QWidget* parent = nullptr);
+
     inline auto mcVersionStr() const -> QString { return m_instance ? m_instance->getPackProfile()->getComponentVersion("net.minecraft") : ""; }
     inline auto mcVersion() const -> Version { return { mcVersionStr() }; }