cfg: enforce minimum window size (#767)

src/spice2x/cfg/configurator_wnd.cpp

@@ -21,6 +21,8 @@ static const char *CLASS_NAME = "ConfiguratorWindow";
 static std::string WINDOW_TITLE;
 static int WINDOW_SIZE_X = 800;
 static int WINDOW_SIZE_Y = 600;
+static const int WINDOW_MIN_SIZE_X = 540;
+static const int WINDOW_MIN_SIZE_Y = 300;
 static HICON WINDOW_ICON = LoadIcon(GetModuleHandle(nullptr), MAKEINTRESOURCE(MAINICON));
 
 static const UINT_PTR RENDER_TIMER_ID = 1;
@@ -290,6 +292,22 @@ LRESULT CALLBACK cfg::ConfiguratorWindow::window_proc(HWND hWnd, UINT uMsg, WPAR
             }
             break;
         }
+        case WM_GETMINMAXINFO: {
+
+            // enforce a minimum window size so the UI can't be shrunk to a
+            // point where the tabs/controls become unusable. The minimum is
+            // expressed in client-area pixels and converted to a full window
+            // size that accounts for the current frame/title-bar style.
+            RECT rc = { 0, 0, WINDOW_MIN_SIZE_X, WINDOW_MIN_SIZE_Y };
+            DWORD style = static_cast<DWORD>(GetWindowLongPtrW(hWnd, GWL_STYLE));
+            DWORD ex_style = static_cast<DWORD>(GetWindowLongPtrW(hWnd, GWL_EXSTYLE));
+            if (AdjustWindowRectEx(&rc, style, FALSE, ex_style)) {
+                auto *mmi = reinterpret_cast<MINMAXINFO *>(lParam);
+                mmi->ptMinTrackSize.x = rc.right - rc.left;
+                mmi->ptMinTrackSize.y = rc.bottom - rc.top;
+            }
+            break;
+        }
         case WM_CREATE: {
 
             // set user data of window to class pointer

src/spice2x/overlay/windows/config.cpp

@@ -4209,8 +4209,10 @@ namespace overlay::windows {
 
         ImGui::TextColored(ImVec4(1, 0.7f, 0, 1), "Card overrides");
         ImGui::Spacing();
-        ImGui::TextUnformatted("Specify hardcoded card numbers here.");
+        ImGui::TextWrapped(
-        ImGui::TextUnformatted("Overrides will always take priority when Insert Card is pressed.");
+            "%s",
+            "Specify hardcoded card numbers here.\n\n"
+            "Overrides will always take priority when Insert Card is pressed.");
         ImGui::Spacing();
 
         // read in values from options
@@ -4387,7 +4389,8 @@ namespace overlay::windows {
         ImGui::Spacing();
         ImGui::TextColored(ImVec4(1, 0.7f, 0, 1), "Card from text files");
         ImGui::Spacing();
-        ImGui::TextUnformatted(
+        ImGui::TextWrapped(
+            "%s",
             "Use text files on disk; its content will be read when Insert Card is pressed.");
         ImGui::Spacing();