Added multi-line support for bounding box computation to font.

Re-adjusted the game mode hepl screen to display correctly with.


git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/trunk/supertuxkart@1897 178a84e3-b1eb-0310-8ba1-8eac791a3b58

src/gui/font.cpp

@@ -17,9 +17,12 @@
 //  along with this program; if not, write to the Free Software
 //  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
+#include <vector>
+
 #include "file_manager.hpp"
 #include "user_config.hpp"
 #include "gui/font.hpp"
+#include "string_utils.hpp"
 
 Font* font_gui;
 Font* font_race;
@@ -124,7 +127,7 @@ void Font::PrintBold(const std::string &text, int size, int x, int y,
     int   sz          = (int)(size*std::max(scale_x,scale_y)*fontScaling);
 
     float l,r,t,b;
-    m_fnt->getBBox(text.c_str(), (float)sz, 0, &l, &r, &b, &t);
+    getBBoxMultiLine(text, sz, 0, &l, &r, &b, &t);
     const int W = (int)((r-l+0.99));
     const int H = (int)((t-b+0.99));
 
@@ -198,3 +201,31 @@ void Font::getBBox(const std::string &text, int size, bool italic,
     }
 
 }
+// ----------------------------------------------------------------------------
+
+void Font::getBBoxMultiLine(const std::string &text, int size, bool italic,
+                            float *left, float *right, float *bot, float *top)
+{
+    // Plib does not handle multi-lines strings as expected. So as a work
+    // around we split strings into lines, and compute the size for each
+    // line, and take the maximum size at the end.
+    std::vector<std::string> s=StringUtils::split(text,'\n');
+    m_fnt->getBBox(s[0].c_str(), (float)size, italic, left, right, bot, top);
+    for(unsigned int i=1; i<s.size(); i++)
+    {
+        float l,r,b,t;
+        m_fnt->getBBox(s[i].c_str(), (float)size, italic, &l, &r, &b, &t);
+        if(left) *left  = std::min(*left,  l);
+        if(bot ) *bot   = std::min(*bot,   b);
+        if(right)*right = std::max(*right, r); 
+        if(top)  *top   = std::max(*top,   t);
+    }
+    if(user_config->m_width<800) {
+        float fract=(float)user_config->m_width/800.0f;
+        *left  *= fract;
+        *right *= fract;
+        if(bot) *bot   *= fract;
+        if(top) *top   *= fract;
+    }
+
+}

src/gui/font.hpp

@@ -39,6 +39,8 @@ public:
     ~Font();
     void getBBox(const std::string &text, int size, bool italic,
                  float *left, float *right, float *bot, float *top);
+    void getBBoxMultiLine(const std::string &text, int size, bool italic,
+                          float *left, float *right, float *bot, float *top);
 
     // The actual main function which does everything
     // ----------------------------------------------

src/gui/help_page_three.cpp

@@ -71,7 +71,7 @@ most points wins (shortest time in case of a tie!)          "));
     if(!unlock_manager->isLocked("followleader"))
     {
         widget_manager->addTextWgt( WTOK_TXT4, 100, 10,
-            _("Follow the leader: Stay behind the leader kart.\n\
+            _("Follow the leader: Stay behind the leader kart.                 \n\
 When the countdown reaches zero, a kart ahead\n\
 of the leader or the last kart is eliminated."));
         widget_manager->setWgtTextSize( WTOK_TXT4, WGT_FNT_SML );

src/widget.cpp

@@ -113,7 +113,7 @@ void Widget::resizeToText()
     if( !m_text.empty() )
     {
         float left, right, bottom, top;
-        m_font->getBBox(m_text.c_str(), m_text_size, false, &left, &right, &bottom, &top);
+        m_font->getBBoxMultiLine(m_text, m_text_size, false, &left, &right, &bottom, &top);
 
         const int TEXT_WIDTH = (int)(right - left);
         const int TEXT_HEIGHT = (int)(top - bottom);
@@ -526,7 +526,7 @@ void Widget::updateVariables( const float DELTA )
     // values to the left.
 
     float left, right;
-    m_font->getBBox(m_text.c_str(), m_text_size, false, &left, &right, NULL, NULL);
+    m_font->getBBoxMultiLine(m_text, m_text_size, false, &left, &right, NULL, NULL);
     int text_width = (int)(right - left + 0.99);