Add basic code for widget and screen resize

src/guiengine/abstract_top_level_container.cpp

@@ -91,6 +91,25 @@ void AbstractTopLevelContainer::addWidgetsRecursively(
 
 }   // addWidgetsRecursively
 
+// ----------------------------------------------------------------------------
+/** This function invokes resize() of each widgets and its children.
+ *  \param widgets The vector of widgets to resize
+ *  \param parent The parent widget of the vector of widgets */
+void AbstractTopLevelContainer::resizeWidgetsRecursively(PtrVector<Widget>& widgets)
+{
+    const unsigned short widgets_amount = widgets.size();
+
+    for (int n=0; n<widgets_amount; n++)
+    {
+        widgets[n].resize();
+        if (widgets[n].getType() == WTYPE_DIV)
+        {
+            resizeWidgetsRecursively(widgets[n].m_children);
+        }
+    } // for n in all widgets
+
+}   // resizeWidgetsRecursively
+
 // ----------------------------------------------------------------------------
 
 /** This function checks recursively if a widget is a child of a vector of widgets

src/guiengine/abstract_top_level_container.hpp

@@ -63,6 +63,7 @@ namespace GUIEngine
 
                 void         addWidgetsRecursively(PtrVector<Widget>& widgets,
                                     Widget* parent=NULL);
+                void         resizeWidgetsRecursively(PtrVector<Widget>& widgets);
 
     public:
                              AbstractTopLevelContainer();

src/guiengine/engine.cpp

@@ -951,6 +951,8 @@ namespace GUIEngine
         }
 
         Debug::closeDebugMenu();
+        if (!g_current_screen->isLoaded())
+            g_current_screen->loadFromFile();
         g_current_screen->beforeAddingWidget();
 
         // show screen

src/guiengine/engine.hpp

@@ -102,6 +102,7 @@ namespace GUIEngine
 
     /** Widgets that need to be notified at every frame can add themselves there (FIXME: unclean) */
     extern PtrVector<Widget, REF> needsUpdate;
+    extern PtrVector<Screen, REF> g_loaded_screens;
 
     /**
       * \brief               Call this method to init the GUI engine.

src/guiengine/screen.cpp

@@ -229,6 +229,17 @@ void Screen::manualRemoveWidget(Widget* w)
     m_widgets.remove(w);
 }   // manualRemoveWidget
 
+// -----------------------------------------------------------------------------
+void Screen::onResize()
+{
+    m_width = irr_driver->getActualScreenSize().Width;
+    m_height = irr_driver->getActualScreenSize().Height;
+
+    calculateLayout();
+
+    resizeWidgetsRecursively(m_widgets);
+}   // onResize
+
 // -----------------------------------------------------------------------------
 
 #if 0

src/guiengine/screen.hpp

@@ -289,6 +289,11 @@ protected:
          */
         virtual void onDraw(float dt) { };
 
+        /**
+         * \brief optional callback you can override to be notified at every resize.
+         */
+        virtual void onResize();
+
         /**
          * \return which music to play at this screen
          */

src/guiengine/widget.cpp

@@ -299,17 +299,23 @@ bool Widget::isFocusedForPlayer(const int playerID)
 
 // -----------------------------------------------------------------------------
 
-void Widget::move(const int x, const int y, const int w, const int h)
+void Widget::resize()
 {
     assert(m_magic_number == 0xCAFEC001);
 
+    if (m_element)
+        moveIrrlichtElement();
+}
+
+// -----------------------------------------------------------------------------
+
+void Widget::move(const int x, const int y, const int w, const int h)
+{
     m_x = x;
     m_y = y;
     m_w = w;
     m_h = h;
-
-    if (m_element != NULL)
-        m_element->setRelativePosition( core::rect < s32 > (x, y, x+w, y+h) );
+    resize();
 }
 
 // -----------------------------------------------------------------------------

src/guiengine/widget.hpp

@@ -405,7 +405,12 @@ namespace GUIEngine
         virtual EventPropagation onActivationInput(const int playerID) { return EVENT_LET; }
 
         /**
-         * Call to resize/move the widget. Not all widgets can resize gracefully.
+         * Call to resize the widget when its coordinations are updated.
+         */
+        virtual void resize();
+
+        /**
+         * Move the widget to the given position.
          */
         virtual void move(const int x, const int y, const int w, const int h);