Add resizing code for label widget

src/guiengine/widgets/label_widget.cpp

@@ -40,7 +40,9 @@ LabelWidget::LabelWidget(LabelType type) : Widget(WTYPE_LABEL)
 {
     m_type   = type;
     m_scroll_speed = 0;
+    m_per_character_size = 0;
     m_scroll_offset = 0;
+    m_expand_if_needed = false;
 
     if (m_type == BRIGHT)
     {
@@ -109,6 +111,8 @@ void LabelWidget::add()
         irrwidget->setOverrideColor( video::SColor(255,255,255,255) );
         irrwidget->setOverrideFont( GUIEngine::getTinyTitleFont() );
     }
+    m_per_character_size = getCurrentFont()->getDimension(L"X").Height;
+
     //irrwidget->setBackgroundColor( video::SColor(255,255,0,0) );
     //irrwidget->setDrawBackground(true);
 
@@ -129,19 +133,27 @@ void LabelWidget::add()
 void LabelWidget::setText(const core::stringw& text, bool expandIfNeeded)
 {
     m_scroll_offset = 0;
+    m_expand_if_needed = expandIfNeeded;
+    updateExpandedText(text);
+    Widget::setText(text);
+}   // setText
 
-    if (expandIfNeeded)
+// ----------------------------------------------------------------------------
+irr::gui::IGUIFont* LabelWidget::getCurrentFont() const
+{
+    IGUIFont* font = static_cast<IGUIStaticText*>(m_element)->getOverrideFont();
+    if (!font)
+        font = GUIEngine::getFont();
+    return font;
+}   // getCurrentFont
+
+// ----------------------------------------------------------------------------
+void LabelWidget::updateExpandedText(const irr::core::stringw& text)
+{
+    if (m_expand_if_needed)
     {
         assert(m_element != NULL);
-        int fwidth;
-        if(m_type == TITLE)
-            fwidth = GUIEngine::getTitleFont()->getDimension(text.c_str()).Width;
-        else if(m_type == SMALL_TITLE)
-            fwidth = GUIEngine::getSmallTitleFont()->getDimension(text.c_str()).Width;
-        else if(m_type == TINY_TITLE)
-            fwidth = GUIEngine::getTinyTitleFont()->getDimension(text.c_str()).Width;
-        else 
-            fwidth = GUIEngine::getFont()->getDimension(text.c_str()).Width;
+        int fwidth = getCurrentFont()->getDimension(text.c_str()).Width;
         core::rect<s32> rect = m_element->getRelativePosition();
 
         if (rect.getWidth() < fwidth)
@@ -151,12 +163,7 @@ void LabelWidget::setText(const core::stringw& text, bool expandIfNeeded)
             m_element->updateAbsolutePosition();
         }
     }
-
-    if (m_scroll_speed > 0)
-        m_scroll_offset = (float)m_w;
-
-    Widget::setText(text);
-}   // setText
+}   // updateExpandedText
 
 // ----------------------------------------------------------------------------
 /** Needs to be called to update scrolling.
@@ -166,8 +173,9 @@ void LabelWidget::update(float dt)
 {
     if (m_scroll_speed != 0)
     {
-        m_scroll_offset -= dt*m_scroll_speed*5.0f;
-        m_element->setRelativePosition( core::position2di( /*m_x +*/ (int)m_scroll_offset,
+        m_scroll_offset -= dt * m_scroll_speed * 5.0f;
+        int offset = (float)m_w + m_scroll_offset * m_per_character_size;
+        m_element->setRelativePosition( core::position2di( /*m_x +*/ offset,
                                                            /*m_y*/ 0 ) );
     }
 }   // update
@@ -177,7 +185,8 @@ bool LabelWidget::scrolledOff() const
 {
     // This method may only be called after this widget has been add()ed
     assert(m_element != NULL);
-    return m_scroll_offset <= -m_element->getAbsolutePosition().getWidth();
+    return (float)m_w + m_scroll_offset * m_per_character_size <=
+        -1.0f * (float)m_element->getAbsolutePosition().getWidth();
 }
 
 // ----------------------------------------------------------------------------
@@ -189,6 +198,23 @@ void LabelWidget::setScrollSpeed(float speed)
 
 // ----------------------------------------------------------------------------
 
+void LabelWidget::resize()
+{
+    m_per_character_size = getCurrentFont()->getDimension(L"X").Height;
+    if (m_scroll_speed != 0)
+    {
+        rect<s32> widget_size = rect<s32>(m_x, m_y, m_x + m_w, m_y + m_h);
+        core::rect<s32> r(core::position2di(0, 0), widget_size.getSize());
+        m_element->getParent()->setRelativePosition(widget_size);
+        m_element->setRelativePosition(r);
+        updateExpandedText(m_text);
+    }
+    else
+        Widget::resize();
+}   // resize
+
+// ----------------------------------------------------------------------------
+
 void LabelWidget::setColor(const irr::video::SColor& color)
 {
     assert(m_element != NULL);

src/guiengine/widgets/label_widget.hpp

@@ -27,6 +27,11 @@
 #include "utils/leak_check.hpp"
 #include "utils/ptr_vector.hpp"
 
+namespace irr
+{
+    namespace gui { class IGUIFont; }
+}
+
 namespace GUIEngine
 {
     /** \brief A simple label widget.
@@ -51,10 +56,16 @@ namespace GUIEngine
         LabelType         m_type;
         irr::video::SColor m_color;
         bool               m_has_color;
+        bool               m_expand_if_needed;
+
+        irr::gui::IGUIFont* getCurrentFont() const;
+        void updateExpandedText(const irr::core::stringw& text);
 
         /** Scroll speed in characters/seconds (0 if no scrolling). */
         float              m_scroll_speed;
-        
+
+        float              m_per_character_size;
+
         /** Current scroll offset. */
         float              m_scroll_offset;
 
@@ -114,6 +125,7 @@ namespace GUIEngine
           */
         bool scrolledOff() const;
 
+        virtual void resize();
     };
 }
 

src/states_screens/main_menu_screen.cpp

@@ -86,7 +86,7 @@ MainMenuScreen::MainMenuScreen() : Screen("main_menu.stkgui")
 void MainMenuScreen::loadedFromFile()
 {
     LabelWidget* w = getWidget<LabelWidget>("info_addons");
-    w->setScrollSpeed(GUIEngine::getFontHeight() / 2);
+    w->setScrollSpeed(0.5f);
     
     RibbonWidget* rw_top = getWidget<RibbonWidget>("menu_toprow");
     assert(rw_top != NULL);

src/states_screens/online/networking_lobby.cpp

@@ -450,7 +450,7 @@ void NetworkingLobby::onUpdate(float delta)
         m_header->getIrrlichtElement()->remove();
         if (m_header_text_width > m_header->m_w)
         {
-            m_header->setScrollSpeed(GUIEngine::getTitleFontHeight() / 2);
+            m_header->setScrollSpeed(0.5f);
             m_header->add();
             m_header->setText(m_header_text, true);
         }