5 files changed, 111 insertions, 3 deletions

diff --git a/src/yuzu/CMakeLists.txt b/src/yuzu/CMakeLists.txt
index 31b65c04c..5138bd9a3 100644
--- a/src/yuzu/CMakeLists.txt
+++ b/src/yuzu/CMakeLists.txt
@@ -7,6 +7,8 @@ add_executable(yuzu
     Info.plist
     about_dialog.cpp
     about_dialog.h
+    applets/error.cpp
+    applets/error.h
     applets/profile_select.cpp
     applets/profile_select.h
     applets/software_keyboard.cpp
diff --git a/src/yuzu/applets/error.cpp b/src/yuzu/applets/error.cpp
new file mode 100644
index 000000000..1fb2fe277
--- /dev/null
+++ b/src/yuzu/applets/error.cpp
@@ -0,0 +1,59 @@
+// Copyright 2019 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <QDateTime>
+#include "core/hle/lock.h"
+#include "yuzu/applets/error.h"
+#include "yuzu/main.h"
+
+QtErrorDisplay::QtErrorDisplay(GMainWindow& parent) {
+    connect(this, &QtErrorDisplay::MainWindowDisplayError, &parent,
+            &GMainWindow::ErrorDisplayDisplayError, Qt::QueuedConnection);
+    connect(&parent, &GMainWindow::ErrorDisplayFinished, this,
+            &QtErrorDisplay::MainWindowFinishedError, Qt::DirectConnection);
+}
+
+QtErrorDisplay::~QtErrorDisplay() = default;
+
+void QtErrorDisplay::ShowError(ResultCode error, std::function<void()> finished) const {
+    this->callback = std::move(finished);
+    emit MainWindowDisplayError(
+        tr("An error has occured.\nPlease try again or contact the developer of the "
+           "software.\n\nError Code: %1-%2 (0x%3)")
+            .arg(static_cast<u32>(error.module.Value()) + 2000, 4, 10, QChar::fromLatin1('0'))
+            .arg(error.description, 4, 10, QChar::fromLatin1('0'))
+            .arg(error.raw, 8, 16, QChar::fromLatin1('0')));
+}
+
+void QtErrorDisplay::ShowErrorWithTimestamp(ResultCode error, std::chrono::seconds time,
+                                            std::function<void()> finished) const {
+    this->callback = std::move(finished);
+    emit MainWindowDisplayError(
+        tr("An error occured on %1 at %2.\nPlease try again or contact the "
+           "developer of the software.\n\nError Code: %3-%4 (0x%5)")
+            .arg(QDateTime::fromSecsSinceEpoch(time.count()).toString("dddd, MMMM d, yyyy"))
+            .arg(QDateTime::fromSecsSinceEpoch(time.count()).toString("h:mm:ss A"))
+            .arg(static_cast<u32>(error.module.Value()) + 2000, 4, 10, QChar::fromLatin1('0'))
+            .arg(error.description, 4, 10, QChar::fromLatin1('0'))
+            .arg(error.raw, 8, 16, QChar::fromLatin1('0')));
+}
+
+void QtErrorDisplay::ShowCustomErrorText(ResultCode error, std::string dialog_text,
+                                         std::string fullscreen_text,
+                                         std::function<void()> finished) const {
+    this->callback = std::move(finished);
+    emit MainWindowDisplayError(
+        tr("An error has occured.\nError Code: %1-%2 (0x%3)\n\n%4\n\n%5")
+            .arg(static_cast<u32>(error.module.Value()) + 2000, 4, 10, QChar::fromLatin1('0'))
+            .arg(error.description, 4, 10, QChar::fromLatin1('0'))
+            .arg(error.raw, 8, 16, QChar::fromLatin1('0'))
+            .arg(QString::fromStdString(dialog_text))
+            .arg(QString::fromStdString(fullscreen_text)));
+}
+
+void QtErrorDisplay::MainWindowFinishedError() {
+    // Acquire the HLE mutex
+    std::lock_guard<std::recursive_mutex> lock(HLE::g_hle_lock);
+    callback();
+}
diff --git a/src/yuzu/applets/error.h b/src/yuzu/applets/error.h
new file mode 100644
index 000000000..b0932d895
--- /dev/null
+++ b/src/yuzu/applets/error.h
@@ -0,0 +1,33 @@
+// Copyright 2019 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <QObject>
+
+#include "core/frontend/applets/error.h"
+
+class GMainWindow;
+
+class QtErrorDisplay final : public QObject, public Core::Frontend::ErrorApplet {
+    Q_OBJECT
+
+public:
+    explicit QtErrorDisplay(GMainWindow& parent);
+    ~QtErrorDisplay() override;
+
+    void ShowError(ResultCode error, std::function<void()> finished) const override;
+    void ShowErrorWithTimestamp(ResultCode error, std::chrono::seconds time,
+                                std::function<void()> finished) const override;
+    void ShowCustomErrorText(ResultCode error, std::string dialog_text, std::string fullscreen_text,
+                             std::function<void()> finished) const override;
+
+signals:
+    void MainWindowDisplayError(QString error) const;
+
+private:
+    void MainWindowFinishedError();
+
+    mutable std::function<void()> callback;
+};
diff --git a/src/yuzu/main.cpp b/src/yuzu/main.cpp
index bdee44b04..e33e3aaaf 100644
--- a/src/yuzu/main.cpp
+++ b/src/yuzu/main.cpp
@@ -8,6 +8,7 @@
 #include <thread>
 
 // VFS includes must be before glad as they will conflict with Windows file api, which uses defines.
+#include "applets/error.h"
 #include "applets/profile_select.h"
 #include "applets/software_keyboard.h"
 #include "applets/web_browser.h"
@@ -15,6 +16,7 @@
 #include "configuration/configure_per_general.h"
 #include "core/file_sys/vfs.h"
 #include "core/file_sys/vfs_real.h"
+#include "core/frontend/applets/general_frontend.h"
 #include "core/frontend/scope_acquire_window_context.h"
 #include "core/hle/service/acc/profile_manager.h"
 #include "core/hle/service/am/applets/applets.h"
@@ -795,9 +797,13 @@ bool GMainWindow::LoadROM(const QString& filename) {
 
     system.SetGPUDebugContext(debug_context);
 
-    system.SetProfileSelector(std::make_unique<QtProfileSelector>(*this));
-    system.SetSoftwareKeyboard(std::make_unique<QtSoftwareKeyboard>(*this));
-    system.SetWebBrowser(std::make_unique<QtWebBrowser>(*this));
+    system.SetAppletFrontendSet({
+        std::make_unique<QtErrorDisplay>(*this),
+        nullptr,
+        std::make_unique<QtProfileSelector>(*this),
+        std::make_unique<QtSoftwareKeyboard>(*this),
+        std::make_unique<QtWebBrowser>(*this),
+    });
 
     const Core::System::ResultStatus result{system.Load(*render_window, filename.toStdString())};
 
@@ -1583,6 +1589,11 @@ void GMainWindow::OnLoadComplete() {
     loading_screen->OnLoadComplete();
 }
 
+void GMainWindow::ErrorDisplayDisplayError(QString body) {
+    QMessageBox::critical(this, tr("Error Display"), body);
+    emit ErrorDisplayFinished();
+}
+
 void GMainWindow::OnMenuReportCompatibility() {
     if (!Settings::values.yuzu_token.empty() && !Settings::values.yuzu_username.empty()) {
         CompatDB compatdb{this};
diff --git a/src/yuzu/main.h b/src/yuzu/main.h
index ce5045819..fb2a193cb 100644
--- a/src/yuzu/main.h
+++ b/src/yuzu/main.h
@@ -102,6 +102,8 @@ signals:
     // Signal that tells widgets to update icons to use the current theme
     void UpdateThemedIcons();
 
+    void ErrorDisplayFinished();
+
     void ProfileSelectorFinishedSelection(std::optional<Service::Account::UUID> uuid);
     void SoftwareKeyboardFinishedText(std::optional<std::u16string> text);
     void SoftwareKeyboardFinishedCheckDialog();
@@ -111,6 +113,7 @@ signals:
 
 public slots:
     void OnLoadComplete();
+    void ErrorDisplayDisplayError(QString body);
     void ProfileSelectorSelectProfile();
     void SoftwareKeyboardGetText(const Core::Frontend::SoftwareKeyboardParameters& parameters);
     void SoftwareKeyboardInvokeCheckDialog(std::u16string error_message);