Allow window resizing

CGame.h

@@ -42,6 +42,7 @@ class CGame
     CFont lastFps;
 
     Uint32 lastFrameTime = 0;
+    unsigned suppressResizeEvents_ = 0;
 
     // structure for mouse cursor
     struct
@@ -65,6 +66,7 @@ class CGame
     std::unique_ptr<CMap> MapObj;
 
     void SetAppIcon();
+    void RecreateDisplayResources();
 
 public:
     CGame(Extent GameResolution_, bool fullscreen_);
@@ -74,6 +76,7 @@ class CGame
 
     bool Init();
     bool ReCreateWindow();
+    void UpdateDisplaySize(const Extent& newSize);
 
     void EventHandling(SDL_Event* Event);
 

CGame_Event.cpp

@@ -63,7 +63,11 @@ void CGame::EventHandling(SDL_Event* Event)
 
             switch(Event->key.keysym.sym)
             {
-                case SDLK_F2: fullscreen = !fullscreen; break;
+                case SDLK_RETURN:
+                case SDLK_KP_ENTER:
+                    if(Event->key.keysym.mod & KMOD_ALT)
+                        fullscreen = !fullscreen;
+                    break;
 
 #ifdef _ADMINMODE
                 case SDLK_F3: // if CTRL and ALT are pressed
@@ -377,6 +381,20 @@ void CGame::EventHandling(SDL_Event* Event)
             break;
         }
 
+        case SDL_WINDOWEVENT:
+        {
+            if(Event->window.event == SDL_WINDOWEVENT_RESIZED)
+            {
+                if(suppressResizeEvents_ > 0)
+                {
+                    suppressResizeEvents_--;
+                    break; // Skip stale event from our own window recreation
+                }
+                UpdateDisplaySize(Extent(Event->window.data1, Event->window.data2));
+            }
+            break;
+        }
+
         case SDL_QUIT: Running = false; break;
 
         default: break;

CGame_Init.cpp

@@ -5,6 +5,8 @@
 
 #include "CGame.h"
 #include "CIO/CFile.h"
+#include "CIO/CMenu.h"
+#include "CIO/CWindow.h"
 #include "CMap.h"
 #include "CSurface.h"
 #include "SGE/sge_blib.h"
@@ -17,27 +19,44 @@
 
 bool CGame::ReCreateWindow()
 {
+    suppressResizeEvents_ = 3;
     displayTexture_.reset();
     renderer_.reset();
     window_.reset();
     window_.reset(SDL_CreateWindow("Return to the Roots Map editor [BETA]", SDL_WINDOWPOS_CENTERED,
                                    SDL_WINDOWPOS_CENTERED, GameResolution.x, GameResolution.y,
-                                   fullscreen ? SDL_WINDOW_FULLSCREEN : 0));
+                                   fullscreen ? SDL_WINDOW_FULLSCREEN : SDL_WINDOW_RESIZABLE));
     if(!window_)
         return false;
     renderer_.reset(SDL_CreateRenderer(window_.get(), -1, 0));
     if(!renderer_)
         return false;
-    displayTexture_ = makeSdlTexture(renderer_, SDL_PIXELFORMAT_ARGB8888, SDL_TEXTUREACCESS_STREAMING, GameResolution.x,
-                                     GameResolution.y);
-    Surf_Display = makeRGBSurface(GameResolution.x, GameResolution.y, true);
+    RecreateDisplayResources();
     if(!displayTexture_ || !Surf_Display)
         return false;
 
     SetAppIcon();
     return true;
 }
 
+void CGame::RecreateDisplayResources()
+{
+    displayTexture_.reset();
+    displayTexture_ = makeSdlTexture(renderer_, SDL_PIXELFORMAT_ARGB8888, SDL_TEXTUREACCESS_STREAMING, GameResolution.x,
+                                     GameResolution.y);
+    Surf_Display = makeRGBSurface(GameResolution.x, GameResolution.y, true);
+}
+
+void CGame::UpdateDisplaySize(const Extent& newSize)
+{
+    GameResolution = newSize;
+    RecreateDisplayResources();
+    for(auto& menu : Menus)
+        menu->resetSurface();
+    for(auto& wnd : Windows)
+        wnd->resetSurface();
+}
+
 bool CGame::Init()
 {
     std::cout << "Return to the Roots Map editor\n";

CGame_Render.cpp

@@ -39,6 +39,7 @@ void CGame::SetAppIcon()
 
 void CGame::Render()
 {
+    suppressResizeEvents_ = 0;
     if(Extent(Surf_Display->w, Surf_Display->h) != GameResolution
        || fullscreen != ((SDL_GetWindowFlags(window_.get()) & SDL_WINDOW_FULLSCREEN) != 0))
     {

CIO/CControlContainer.h

@@ -68,6 +68,11 @@ class CControlContainer
     }
     void setWaste() { waste = true; }
     bool isWaste() const { return waste; }
+    void resetSurface()
+    {
+        surface.reset();
+        needRender = true;
+    }
     // Methods
     CButton* addButton(void callback(int), int clickedParam, Uint16 x = 0, Uint16 y = 0, Uint16 w = 20, Uint16 h = 20,
                        int color = BUTTON_GREY, const char* text = nullptr, int picture = -1);

callbacks.cpp

@@ -611,7 +611,7 @@ void callback::EditorHelpMenu(int Param)
                                      "..............................F1");
             SelectBoxHelp->addOption(
               "Window/"
-              "Fullscreen........................................................................................F2");
+              "Fullscreen...................................................................................Alt+Enter");
             SelectBoxHelp->addOption(
               "Zoom in/normal/out......................................................................F5/F6/"
               "F7");