Do not allow to move resizable windows outside of game window

apps/openmw/mwgui/inventorywindow.cpp

@@ -417,6 +417,8 @@ namespace MWGui
 
     void InventoryWindow::onWindowResize(MyGUI::Window* _sender)
     {
+        WindowBase::clampWindowCoordinates(_sender);
+
         adjustPanes();
         const WindowSettingValues settings = getModeSettings(mGuiMode);
 

apps/openmw/mwgui/windowbase.cpp

@@ -7,6 +7,7 @@
 #include "../mwbase/environment.hpp"
 #include "../mwbase/windowmanager.hpp"
 
+#include <components/settings/values.hpp>
 #include <components/widgets/imagebutton.hpp>
 
 #include "draganddrop.hpp"
@@ -77,6 +78,34 @@ void WindowBase::center()
     mMainWidget->setCoord(coord);
 }
 
+void WindowBase::clampWindowCoordinates(MyGUI::Window* window)
+{
+    auto minSize = window->getMinSize();
+    minSize.height = static_cast<int>(minSize.height * Settings::gui().mScalingFactor);
+    minSize.width = static_cast<int>(minSize.width * Settings::gui().mScalingFactor);
+
+    // Window's minimum size is larger than the screen size, can not clamp coordinates
+    MyGUI::IntSize viewSize = MyGUI::RenderManager::getInstance().getViewSize();
+    if (minSize.width > viewSize.width || minSize.height > viewSize.height)
+        return;
+
+    int left = std::max(0, window->getPosition().left);
+    int top = std::max(0, window->getPosition().top);
+    int width = std::clamp(window->getSize().width, 0, viewSize.width);
+    int height = std::clamp(window->getSize().height, 0, viewSize.height);
+    if (left + width > viewSize.width)
+        left = viewSize.width - width;
+
+    if (top + height > viewSize.height)
+        top = viewSize.height - height;
+
+    if (window->getSize().width != width || window->getSize().height != height)
+        window->setSize(width, height);
+
+    if (window->getPosition().left != left || window->getPosition().top != top)
+        window->setPosition(left, top);
+}
+
 WindowModal::WindowModal(const std::string& parLayout)
     : WindowBase(parLayout)
 {

apps/openmw/mwgui/windowbase.hpp

@@ -52,6 +52,8 @@ namespace MWGui
         virtual std::string_view getWindowIdForLua() const { return ""; }
         void setDisabledByLua(bool disabled) { mDisabledByLua = disabled; }
 
+        static void clampWindowCoordinates(MyGUI::Window* window);
+
     protected:
         virtual void onTitleDoubleClicked();
 

apps/openmw/mwgui/windowmanagerimp.cpp

@@ -1200,6 +1200,8 @@ namespace MWGui
             const WindowRectSettingValues& rect = settings.mIsMaximized ? settings.mMaximized : settings.mRegular;
             window->setPosition(MyGUI::IntPoint(static_cast<int>(rect.mX * x), static_cast<int>(rect.mY * y)));
             window->setSize(MyGUI::IntSize(static_cast<int>(rect.mW * x), static_cast<int>(rect.mH * y)));
+
+            WindowBase::clampWindowCoordinates(window);
         }
 
         for (const auto& window : mWindows)
@@ -1714,13 +1716,15 @@ namespace MWGui
 
         const WindowRectSettingValues& rect = settings.mIsMaximized ? settings.mMaximized : settings.mRegular;
 
-        layout->mMainWidget->setPosition(
+        MyGUI::Window* window = layout->mMainWidget->castType<MyGUI::Window>();
+        window->setPosition(
             MyGUI::IntPoint(static_cast<int>(rect.mX * viewSize.width), static_cast<int>(rect.mY * viewSize.height)));
-        layout->mMainWidget->setSize(
+        window->setSize(
             MyGUI::IntSize(static_cast<int>(rect.mW * viewSize.width), static_cast<int>(rect.mH * viewSize.height)));
 
-        MyGUI::Window* window = layout->mMainWidget->castType<MyGUI::Window>();
         window->eventWindowChangeCoord += MyGUI::newDelegate(this, &WindowManager::onWindowChangeCoord);
+        WindowBase::clampWindowCoordinates(window);
+
         mTrackedWindows.emplace(window, settings);
     }
 
@@ -1750,6 +1754,8 @@ namespace MWGui
         if (it == mTrackedWindows.end())
             return;
 
+        WindowBase::clampWindowCoordinates(window);
+
         const WindowSettingValues& settings = it->second;
 
         MyGUI::IntSize viewSize = MyGUI::RenderManager::getInstance().getViewSize();