The command line help text is now available in all applications

ChangeLog

@@ -1,3 +1,6 @@
+2017-09-19  Markus Gans  <guru.mail@muenster.de>
+	* The command line help text is now available in all applications
+
 2017-09-17  Markus Gans  <guru.mail@muenster.de>
 	* FObject has received the iterator child access methods 
 	  begin() and end()

examples/calculator.cpp

@@ -1014,7 +1014,10 @@ int main (int argc, char* argv[])
   // Create a calculator object
   Calc calculator(&app);
 
+  // Set calculator object as main widget
   app.setMainWidget(&calculator);
+
+  // Show and start the application
   calculator.show();
   return app.exec();
 }

examples/choice.cpp

@@ -32,7 +32,7 @@ int main (int argc, char* argv[])
   // Create the application object
   FApplication app(argc, argv);
 
-  // Create a simple dialog box
+  // Create a simple modal dialog box
   FDialog* dgl = new FDialog(&app);
   dgl->setModal();
   dgl->setText ("UNIX select");

examples/dialog.cpp

@@ -58,7 +58,10 @@ int main (int argc, char* argv[])
     &app
   );
 
+  // Set dialog object as main widget
   app.setMainWidget(&dgl);
+
+  // Show and start the application
   dgl.show();
   return app.exec();
 }

examples/hello.cpp

@@ -12,5 +12,7 @@ int main (int argc, char* argv[])
   // Create a simple dialog box
   FMessageBox mbox(&app);
   mbox.setText("Hello world");
+
+  // Start the application
   mbox.exec();
 }

examples/input-dialog.cpp

@@ -113,7 +113,10 @@ int main (int argc, char* argv[])
     &app
   );
 
+  // Set dialog object as main widget
   app.setMainWidget(&dgl);
+
+  // Show and start the application
   dgl.show();
   return app.exec();
 }

examples/keyboard.cpp

@@ -70,12 +70,19 @@ void keyboard::draw()
 //----------------------------------------------------------------------
 int main (int argc, char* argv[])
 {
+  // Create the application object
   FApplication app(argc, argv);
   app.setForegroundColor(fc::Default);
   app.setBackgroundColor(fc::Default);
+
+  // Create a keyboard object
   keyboard key(&app);
   key.addAccelerator('q');
+
+  // Set the keyboard object as main widget
   app.setMainWidget(&key);
+
+  // Show and start the application
   key.show();
   return app.exec();
 }

examples/listbox.cpp

@@ -169,24 +169,19 @@ void Listbox::cb_exitApp (FWidget*, data_ptr)
 
 int main (int argc, char* argv[])
 {
-  if ( argv[1] && ( std::strcmp(argv[1], "--help") == 0
+  // Create the application object
-                   || std::strcmp(argv[1], "-h") == 0 ) )
-  {
-    std::cout << "Generic options:" << std::endl
-              << "  -h, --help                  "
-              << "Display this help and exit" << std::endl;
-    FApplication::print_cmd_Options();
-    std::exit(EXIT_SUCCESS);
-  }
-
   FApplication app(argc, argv);
 
+  // Create main dialog object
   Listbox d(&app);
   d.setText (L"Listbox");
   d.setGeometry (int(1 + (app.getWidth() - 56) / 2), 5, 56, 16);
   d.setShadow();
 
+  // Set dialog d as main widget
   app.setMainWidget(&d);
+
+  // Show and start the application
   d.show();
   return app.exec();
 }

examples/listview.cpp

@@ -178,24 +178,19 @@ void Listview::cb_showInMessagebox (FWidget* widget, data_ptr)
 
 int main (int argc, char* argv[])
 {
-  if ( argv[1] && ( std::strcmp(argv[1], "--help") == 0
+  // Create the application object
-                   || std::strcmp(argv[1], "-h") == 0 ) )
-  {
-    std::cout << "Generic options:" << std::endl
-              << "  -h, --help                  "
-              << "Display this help and exit" << std::endl;
-    FApplication::print_cmd_Options();
-    std::exit(EXIT_SUCCESS);
-  }
-
   FApplication app(argc, argv);
 
+  // Create main dialog object
   Listview d(&app);
   d.setText (L"Weather data");
   d.setGeometry (int(1 + (app.getWidth() - 37) / 2), 3, 37, 20);
   d.setShadow();
 
+  // Set dialog d as main widget
   app.setMainWidget(&d);
+
+  // Show and start the application
   d.show();
   return app.exec();
 }

examples/mandelbrot.cpp

@@ -141,7 +141,10 @@ int main (int argc, char* argv[])
   mb.addAccelerator('q');  // press 'q' to quit
   mb.setShadow();
 
+  // Set the mandelbrot object as main widget
   app.setMainWidget(&mb);
+
+  // Show and start the application
   mb.show();
   return app.exec();
 }

examples/menu.cpp

@@ -279,24 +279,19 @@ void Menu::cb_exitApp (FWidget*, data_ptr)
 
 int main (int argc, char* argv[])
 {
-  if ( argv[1] && ( std::strcmp(argv[1], "--help") == 0
+  // Create the application object
-                   || std::strcmp(argv[1], "-h") == 0 ) )
-  {
-    std::cout << "Generic options:" << std::endl
-              << "  -h, --help                  "
-              << "Display this help and exit" << std::endl;
-    FApplication::print_cmd_Options();
-    std::exit(EXIT_SUCCESS);
-  }
-
   FApplication app (argc, argv);
 
+  // Create main dialog object
   Menu main_dlg (&app);
   main_dlg.setText ("Menu example");
   main_dlg.setGeometry (int(1 + (app.getWidth() - 40) / 2), 2, 40, 6);
   main_dlg.setShadow();
 
+  // Set dialog main_dlg as main widget
   app.setMainWidget (&main_dlg);
+
+  // Show and start the application
   main_dlg.show();
   return app.exec();
 }

examples/mouse.cpp

@@ -532,7 +532,10 @@ int main (int argc, char* argv[])
   mouse_draw.setGeometry (12, 4, 60, 18);
   mouse_draw.addAccelerator('q');  // press 'q' to quit
 
+  // Set dialog object mouse_draw as main widget
   app.setMainWidget(&mouse_draw);
+
+  // Show and start the application
   mouse_draw.show();
   return app.exec();
 }

examples/opti-move.cpp

@@ -132,20 +132,28 @@ int main (int argc, char* argv[])
 {
   int xmax, ymax;
 
+  // Create the application object
   FApplication app(argc, argv);
+
+  // Create a FVTerm object as virtual terminal
   terminal = new FVTerm(&app);
   xmax = terminal->getColumnNumber() - 1;
   ymax = terminal->getLineNumber() - 1;
   FString line(xmax + 1, '-');
 
+  // Place the cursor in the upper left corner
   terminal->setTermXY(0,0);
+  // Reset all terminal attributes
   terminal->setNormal();
+  // Clear the screen
   terminal->clearArea();
 
+  // Show the determined terminal name and text resolution
   std::cout << "Terminal: " << terminal->getTermType() << "\r\n";
   std::cout << " Columns: 0.." << xmax << "\r\n";
   std::cout << "   Lines: 0.." << ymax << "\r\n";
 
+  // Show the escape sequences for the following cursor movements
   std::cout << std::setw(38) << "Cursor move\r\n";
   std::cout << "    (From) -> (To)       ";
   std::cout << "escape sequence          ";
@@ -169,10 +177,13 @@ int main (int argc, char* argv[])
   move (3, 2, xmax, 2);
   move (5, 5, xmax - 5, ymax - 5);
 
+  // Waiting for keypress
   keyPressed();
 
+  // Show terminal speed and milliseconds for all cursor movement sequence
   std::cout << "\r" << line;
   terminal->printMoveDurations();
 
+  // Waiting for keypress
   keyPressed();
 }

examples/scrollview.cpp

@@ -57,6 +57,7 @@ scrollview::scrollview (FWidget* parent)
   , go_west()
   , go_north()
 {
+  // Create the four navigation buttons
   go_east = new FButton(wchar_t(fc::BlackRightPointingPointer) , this);
   go_east->setGeometry (1, 1, 5, 1);
 
@@ -69,6 +70,7 @@ scrollview::scrollview (FWidget* parent)
   go_north = new FButton(wchar_t(fc::BlackUpPointingTriangle) , this);
   go_north->setGeometry (1, getScrollHeight() - 2, 5, 1);
 
+  // Add scroll function callbacks to the buttons
   go_east->addCallback
   (
     "clicked",
@@ -259,7 +261,10 @@ int main (int argc, char* argv[])
   // Create a simple dialog box
   scrollviewdemo svdemo(&app);
 
+  // Set dialog main_dlg as main widget
   app.setMainWidget(&svdemo);
+
+  // Show and start the application
   svdemo.show();
   return app.exec();
 }

examples/string-operations.cpp

@@ -47,11 +47,11 @@ int main (int, char**)
   std::cout << "   cpp_str: \"" << cpp_str << "\"" << std::endl;
 
   // Test: copy a character
-  const FString& ch('c');
+  const FString ch('c');
   std::cout << "      char: '" << ch << "'" << std::endl;
 
   // Test: copy a wide character
-  const FString& wch(L'w');
+  const FString wch(L'w');
   std::cout << "   wchar_t: '" << wch << "'" << std::endl;
 
   // Test: utf-8 string

examples/term-attributes.cpp

@@ -400,11 +400,14 @@ int main (int argc, char* argv[])
   dialog->addAccelerator('q');  // press 'q' to quit
   dialog->setShadow();
 
+  // Create the attribute demo widget as a child object from the dialog
   AttribDemo* demo = new AttribDemo(dialog);
   demo->setGeometry (1, 1, 67, 19);
 
+  // Set the dialog object as main widget
   app.setMainWidget(dialog);
-  dialog->show();
 
+  // Show and start the application
+  dialog->show();
   return app.exec();
 }

examples/timer.cpp

@@ -78,12 +78,19 @@ void timer::onAccel (FAccelEvent* ev)
 //----------------------------------------------------------------------
 int main (int argc, char* argv[])
 {
+  // Create the application object
   FApplication app(argc, argv);
   app.setForegroundColor(fc::Default);
   app.setBackgroundColor(fc::Default);
+
+  // Create a timer object t
   timer t(&app);
   t.addAccelerator('q');
+
+  // Set the timer object t as main widget
   app.setMainWidget(&t);
+
+  // Show and start the application
   t.show();
   return app.exec();
 }

examples/transparent.cpp

@@ -268,24 +268,18 @@ void MainWindow::onTimer (FTimerEvent*)
 
 int main (int argc, char* argv[])
 {
-  if ( argv[1] && ( std::strcmp(argv[1], "--help") == 0
+  // Create the application object
-                   || std::strcmp(argv[1], "-h") == 0 ) )
-  {
-    std::cout << "Generic options:" << std::endl
-              << "  -h, --help                  "
-              << "Display this help and exit" << std::endl;
-    FApplication::print_cmd_Options();
-    std::exit(EXIT_SUCCESS);
-  }
-
   FApplication app (argc, argv);
 
+  // Create main dialog object
   MainWindow main_dlg (&app);
   main_dlg.setText ("non-transparent");
   main_dlg.setGeometry (8, 16, 26, 7);
 
+  // Set dialog main_dlg as main widget
   app.setMainWidget (&main_dlg);
-  main_dlg.show();
 
+  // Show and start the application
+  main_dlg.show();
   return app.exec();
 }

examples/treeview.cpp

@@ -91,6 +91,7 @@ Treeview::Treeview (FWidget* parent)
   FObjectIterator iter_egypt = item_africa->begin();
   FListViewItem* item_egypt = static_cast<FListViewItem*>(*iter_egypt);
 item_egypt = item_egypt;
+item_africa->expand();
 
   // Quit button
   FButton* Quit = new FButton (this);
@@ -135,24 +136,19 @@ void Treeview::cb_exitApp (FWidget*, data_ptr)
 
 int main (int argc, char* argv[])
 {
-  if ( argv[1] && ( std::strcmp(argv[1], "--help") == 0
+  // Create the application object
-                   || std::strcmp(argv[1], "-h") == 0 ) )
-  {
-    std::cout << "Generic options:" << std::endl
-              << "  -h, --help                  "
-              << "Display this help and exit" << std::endl;
-    FApplication::print_cmd_Options();
-    std::exit(EXIT_SUCCESS);
-  }
-
   FApplication app(argc, argv);
 
+  // Create main dialog object
   Treeview d(&app);
   d.setText (L"Continents");
   d.setGeometry (int(1 + (app.getWidth() - 37) / 2), 3, 37, 20);
   d.setShadow();
 
+  // Set dialog d as main widget
   app.setMainWidget(&d);
+
+  // Show and start the application
   d.show();
   return app.exec();
 }

examples/ui.cpp

@@ -911,16 +911,7 @@ int main (int argc, char* argv[])
   FString ver = F_VERSION;  // library version
   FString title = "The FINAL CUT " + ver + " (C) 2017 by Markus Gans";
 
-  if ( argv[1] && ( std::strcmp(argv[1], "--help") == 0
+  // Create the application object app
-                   || std::strcmp(argv[1], "-h") == 0 ) )
-  {
-    std::cout << "Generic options:" << std::endl
-              << "  -h, --help                  "
-              << "Display this help and exit" << std::endl;
-    FApplication::print_cmd_Options();
-    std::exit(EXIT_SUCCESS);
-  }
-
   FApplication app(argc, argv);
   app.setXTermDefaultColors(true);
   app.setXTermTitle (title);
@@ -929,12 +920,20 @@ int main (int argc, char* argv[])
   //app.setTermSize(94,30);
   //app.setNewFont();
 
+  // Create main dialog object d
   MyDialog d(&app);
   d.setText (title);
   d.setGeometry (int((app.getWidth() - 56) / 2), 2, 56, app.getHeight() - 4);
   d.setShadow();
 
+  // Set the dialog object d as the main widget of the application.
+  // When you close the main widget, the application will be closed.
   app.setMainWidget(&d);
+
+  // Show the dialog d
   d.show();
+
+  // Start the application
+  // and return the result to the operating system
   return app.exec();
 }

examples/watch.cpp

@@ -215,7 +215,10 @@ int main (int argc, char* argv[])
   // Create a simple dialog box
   watch w(&app);
 
+  // Set dialog w as main widget
   app.setMainWidget(&w);
+
+  // Show and start the application
   w.show();
   return app.exec();
 }

examples/windows.cpp

@@ -567,24 +567,18 @@ void Window::cb_destroyWindow (FWidget*, data_ptr data)
 
 int main (int argc, char* argv[])
 {
-  if ( argv[1] && ( std::strcmp(argv[1], "--help") == 0
+  // Create the application object
-                   || std::strcmp(argv[1], "-h") == 0 ) )
-  {
-    std::cout << "Generic options:" << std::endl
-              << "  -h, --help                  "
-              << "Display this help and exit" << std::endl;
-    FApplication::print_cmd_Options();
-    std::exit(EXIT_SUCCESS);
-  }
-
   FApplication app (argc, argv);
 
+  // Create main dialog object
   Window main_dlg (&app);
   main_dlg.setText ("Main window");
   main_dlg.setGeometry (int(1 + (app.getWidth() - 40) / 2), 2, 40, 6);
 
+  // Set dialog main_dlg as main widget
   app.setMainWidget (&main_dlg);
-  main_dlg.show();
 
+  // Show and start the application
+  main_dlg.show();
   return app.exec();
 }

include/final/fapplication.h

@@ -85,8 +85,8 @@ class FApplication : public FWidget
     static void        queueEvent (const FObject*, const FEvent*);
     static void        sendQueuedEvents ();
     static bool        eventInQueue();
-    static bool        removeQueuedEvent(const FObject*);
+    static bool        removeQueuedEvent (const FObject*);
-    static void        print_cmd_Options();
+    static FWidget*    showParameterUsage (const int&, char*[]);
 
   private:
     // Typedefs and Enumerations

include/final/flistview.h

@@ -30,6 +30,7 @@
 #ifndef FLISTVIEW_H
 #define FLISTVIEW_H
 
+#include <stack>
 #include <vector>
 
 #include "final/fscrollbar.h"
@@ -52,8 +53,6 @@ class FListViewItem : public FObject
   public:
     // Constructor
     FListViewItem (const FListViewItem&);  // copy constructor
-    explicit FListViewItem (FListViewItem*);
-    explicit FListViewItem (FListView*);
     explicit FListViewItem (FObjectIterator);
     FListViewItem ( const std::vector<FString>&
                   , FWidget::data_ptr
@@ -69,6 +68,7 @@ class FListViewItem : public FObject
     const char*      getClassName() const;
     uInt             getColumnCount() const;
     FString          getText (int) const;
+    uInt             getDepth() const;
 
     // Mutator
     void             setText (int, const FString&);
@@ -215,6 +215,7 @@ class FListView : public FWidget
     };
 
     typedef std::vector<Header> headerItems;
+    typedef std::stack<FObjectIterator> FObjectIteratorStack;
 
     // Constants
     static const int USE_MAX_SIZE = -1;
@@ -248,6 +249,7 @@ class FListView : public FWidget
     FObjectIterator      root;
     FObjectList          selflist;
     FObjectList          itemlist;
+    FObjectIteratorStack iter_path;
     headerItems          header;
     FTermBuffer          headerline;
     FScrollbar*          vbar;
@@ -345,13 +347,27 @@ inline void FListView::nextElement (FObjectIterator& iter)
 {
   FListViewItem* item = static_cast<FListViewItem*>(*iter);
 
-  if ( item->isExpandable() )
+  if ( item->isExpandable() && item->isExpand() )
   {
-    //iter = item->begin();
+    iter_path.push(iter);
-    ++iter;
+    iter = item->begin();
   }
   else
+  {
     ++iter;
+
+    if ( ! iter_path.empty() )
+    {
+      FObjectIterator& parent_iter = iter_path.top();
+
+      if ( iter == (*parent_iter)->end() )
+      {
+        iter = parent_iter;
+        iter_path.pop();
+        ++iter;
+      }
+    }
+  }
 }
 
 #endif  // FLISTVIEW_H

scripts/cppcheck.sh

@@ -2,8 +2,8 @@
 
 if [ $# -gt 0 ]
 then
-  eval cppcheck --enable=all "$@"
+  eval cppcheck --force --enable=all -I../include/ "$@"
 else
-  eval cppcheck --enable=all ../include/final/ ../src/ ../examples/
+  eval cppcheck --force --enable=all -I../include/ ../src/ ../examples/
 fi
 

src/fapplication.cpp

@@ -38,7 +38,7 @@ FApplication::eventQueue* FApplication::event_queue = 0;
 FApplication::FApplication ( const int& _argc
                            , char* _argv[]
                            , bool disable_alt_screen )
-  : FWidget(0, disable_alt_screen)
+  : FWidget(showParameterUsage(_argc,_argv), disable_alt_screen)
   , app_argc(_argc)
   , app_argv(_argv)
   , key(0)
@@ -290,14 +290,31 @@ bool FApplication::removeQueuedEvent (const FObject* receiver)
 }
 
 //----------------------------------------------------------------------
-void FApplication::print_cmd_Options ()
+FWidget* FApplication::showParameterUsage (const int& argc, char* argv[])
 {
-  std::printf ( "\nFinalCut Options:\n"
+  if ( argc > 0 && argv[1] && ( std::strcmp(argv[1], "--help") == 0
-    "  --encoding <name>           Sets the character encoding mode\n"
+                               || std::strcmp(argv[1], "-h") == 0 ) )
-    "                              {UTF8, VT100, PC, ASCII}\n"
+  {
-    "  --no-optimized-cursor       No cursor optimisation\n"
+    std::cout \
-    "  --vgafont                   Set the standard vga 8x16 font\n"
+      << "Generic options:" << std::endl
-    "  --newfont                   Enables the graphical font\n" );
+      << "  -h, --help           "
+      << "       Display this help and exit" << std::endl
+      << std::endl
+      << "FinalCut Options:" << std::endl
+      << "  --encoding <name>    "
+      << "       Sets the character encoding mode" << std::endl
+      << "                       "
+      << "       {UTF8, VT100, PC, ASCII}" << std::endl
+      << "  --no-optimized-cursor"
+      << "       No cursor optimisation" << std::endl
+      << "  --vgafont            "
+      << "       Set the standard vga 8x16 font" << std::endl
+      << "  --newfont            "
+      << "       Enables the graphical font" << std::endl;
+        std::exit(EXIT_SUCCESS);
+  }
+
+  return 0;
 }
 
 
@@ -335,6 +352,7 @@ void FApplication::init()
   std::fill_n (urxvt_mouse, sizeof(urxvt_mouse), '\0');
   // init bit field with 0
   std::memset(&b_state, 0x00, sizeof(b_state));
+
   // interpret the command line options
   cmd_options();
 }

src/fcheckmenuitem.cpp

@@ -40,8 +40,6 @@ void FCheckMenuItem::init (FWidget* parent)
   if ( isMenu(parent) )  // Parent is menu
   {
     FMenu* menu_ptr = static_cast<FMenu*>(parent);
-
-    if ( menu_ptr )
     menu_ptr->has_checkable_items = true;
   }
 }

src/ffiledialog.cpp

@@ -241,7 +241,6 @@ int FFileDialog::readDir()
   int start, dir_num;
   const char* const dir = directory.c_str();
   const char* const filter = filter_pattern.c_str();
-  errno = 0;
   directory_stream = opendir(dir);
 
   if ( ! directory_stream )
@@ -254,37 +253,40 @@ int FFileDialog::readDir()
 
   while ( true )
   {
-    errno = 0;
+    int retval;
-    struct dirent* next = readdir (directory_stream);
+    struct dirent next;
+    struct dirent* result;
 
-    if ( next )
+    retval = readdir_r(directory_stream, &next, &result);
+
+    if ( result && retval == 0 )
     {
-      if ( next->d_name[0] == '.' && next->d_name[1] == '\0' )
+      if ( next.d_name[0] == '.' && next.d_name[1] == '\0' )
         continue;
 
       if ( ! show_hidden
-          && next->d_name[0] == '.'
+          && next.d_name[0] == '.'
-          && next->d_name[1] != '\0'
+          && next.d_name[1] != '\0'
-          && next->d_name[1] != '.' )
+          && next.d_name[1] != '.' )
       {
         continue;
       }
 
       if ( dir[0] == '/' && dir[1] == '\0'
-          && std::strcmp(next->d_name, "..") == 0  )
+          && std::strcmp(next.d_name, "..") == 0  )
         continue;
 
       dir_entry entry;
-      entry.name = strdup(next->d_name);
+      entry.name = strdup(next.d_name);
-      entry.type = next->d_type;
+      entry.type = next.d_type;
 
-      if ( next->d_type == DT_LNK )  // symbolic link
+      if ( next.d_type == DT_LNK )  // symbolic link
       {
         char resolved_path[MAXPATHLEN] = {};
         char symLink[MAXPATHLEN] = {};
         std::strncpy (symLink, dir, sizeof(symLink) - 1);
         std::strncat ( symLink
-                     , next->d_name
+                     , next.d_name
                      , sizeof(symLink) - std::strlen(symLink) - 1);
 
         if ( realpath(symLink, resolved_path) != 0 )  // follow link
@@ -306,11 +308,11 @@ int FFileDialog::readDir()
       else
         std::free(entry.name);
     }
-    else if (errno != 0)
+    else if ( retval > 0 )
     {
       FMessageBox::error (this, "Reading directory\n" + directory);
 
-      if ( errno != EOVERFLOW )
+      if ( retval == EBADF )  // Invalid directory stream descriptor
         break;
     }
     else

src/flistview.cpp

@@ -87,6 +87,20 @@ FString FListViewItem::getText (int column) const
   return column_list[uInt(column)];
 }
 
+//----------------------------------------------------------------------
+uInt FListViewItem::getDepth() const
+{
+  FObject* parent = getParent();
+
+  if ( parent && parent->isInstanceOf("FListViewItem") )
+  {
+    FListViewItem* parent_item = static_cast<FListViewItem*>(parent);
+    return parent_item->getDepth() + 1;
+  }
+
+  return 0;
+}
+
 //----------------------------------------------------------------------
 void FListViewItem::setText (int column, const FString& text)
 {
@@ -226,6 +240,7 @@ FListView::FListView (FWidget* parent)
   , root()
   , selflist()
   , itemlist()
+  , iter_path()
   , header()
   , headerline()
   , vbar(0)
@@ -408,6 +423,8 @@ FObject::FObjectIterator FListView::insert ( FListViewItem* item
       item_iter = parent->appendItem (item);
     }
   }
+  else
+    item_iter = FObjectIterator(0);
 
   int element_count = int(getCount());
   recalculateVerticalBar (element_count);
@@ -1294,6 +1311,8 @@ void FListView::drawListLine ( const FListViewItem* item
                              , bool is_focus
                              , bool is_current )
 {
+  uInt indent = item->getDepth() << 1;  // indent = 2 * depth
+
   setColor (wc.list_fg, wc.list_bg);
 
   if ( is_current )
@@ -1329,13 +1348,24 @@ void FListView::drawListLine ( const FListViewItem* item
 
   if ( tree_view )
   {
+    if ( indent > 0 )
+      line = FString(indent, L' ');
+
     if ( item->expandable  )
     {
-      line = wchar_t(fc::BlackRightPointingPointer);
+      if (item->is_expand )
+      {
+        line += wchar_t(fc::BlackDownPointingTriangle);  // ▼
         line += L' ';
       }
       else
-      line = L"  ";
+      {
+        line += wchar_t(fc::BlackRightPointingPointer);  // ►
+        line += L' ';
+      }
+    }
+    else
+      line += L"  ";
   }
   else
     line = L" ";
@@ -1359,6 +1389,7 @@ void FListView::drawListLine ( const FListViewItem* item
 
       if ( tree_view && i == 1 )
       {
+        width -= indent;
         width--;
       }
 

src/fmenu.cpp

@@ -797,15 +797,11 @@ void FMenu::init(FWidget* parent)
     if ( isMenuBar(parent) )
     {
       FMenuBar* mbar = static_cast<FMenuBar*>(parent);
-
-      if ( mbar )
       mbar->calculateDimensions();
     }
     else if ( isMenu(parent) )
     {
       FMenu* smenu = static_cast<FMenu*>(parent);
-
-      if ( smenu )
       smenu->calculateDimensions();
     }
 

src/fmenuitem.cpp

@@ -299,8 +299,6 @@ void FMenuItem::onKeyPress (FKeyEvent* ev)
   if ( isMenu(super_menu) )
   {
     FMenu* smenu = static_cast<FMenu*>(super_menu);
-
-    if ( smenu )
     smenu->onKeyPress(ev);
   }
 
@@ -330,9 +328,6 @@ void FMenuItem::onMouseDoubleClick (FMouseEvent* ev)
   if ( isMenu(super_menu) )
   {
     FMenu* smenu = static_cast<FMenu*>(super_menu);
-
-    if ( smenu )
-    {
     const FPoint& p2 = smenu->termToWidgetPos(t);
 
     try
@@ -348,7 +343,6 @@ void FMenuItem::onMouseDoubleClick (FMouseEvent* ev)
                 << ex.what() << std::endl;
     }
   }
-  }
 
   if ( isMenuBar(super_menu) )
   {
@@ -409,9 +403,6 @@ void FMenuItem::onMouseDown (FMouseEvent* ev)
   if ( isMenu(super_menu) )
   {
     FMenu* smenu = static_cast<FMenu*>(super_menu);
-
-    if ( smenu )
-    {
     const FPoint& p2 = smenu->termToWidgetPos(t);
 
     try
@@ -427,7 +418,6 @@ void FMenuItem::onMouseDown (FMouseEvent* ev)
                 << ex.what() << std::endl;
     }
   }
-  }
 
   if ( isMenuBar(super_menu) )
   {
@@ -488,41 +478,29 @@ void FMenuItem::onMouseUp (FMouseEvent* ev)
   if ( isMenu(super_menu) )
   {
     FMenu* smenu = static_cast<FMenu*>(super_menu);
-
-    if ( smenu )
-    {
     const FPoint& p2 = smenu->termToWidgetPos(t);
     FMouseEvent* _ev = new FMouseEvent (fc::MouseUp_Event, p2, t, b);
     smenu->onMouseUp(_ev);
     delete _ev;
   }
-  }
 
   if ( isMenuBar(super_menu) )
   {
     FMenuBar* mbar = static_cast<FMenuBar*>(super_menu);
-
-    if ( mbar )
-    {
     const FPoint& p2 = mbar->termToWidgetPos(t);
     FMouseEvent* _ev = new FMouseEvent (fc::MouseUp_Event, p2, t, b);
     mbar->onMouseUp(_ev);
     delete _ev;
   }
-  }
 
   if ( isWindowsMenu(super_menu) )
   {
     FDialog* dgl = static_cast<FDialog*>(super_menu);
-
-    if ( dgl )
-    {
     const FPoint& p2 = dgl->termToWidgetPos(t);
     FMouseEvent* _ev = new FMouseEvent (fc::MouseUp_Event, p2, t, b);
     dgl->onMouseUp(_ev);
     delete _ev;
   }
-  }
 }
 
 //----------------------------------------------------------------------
@@ -537,41 +515,29 @@ void FMenuItem::onMouseMove (FMouseEvent* ev)
   if ( isMenu(super_menu) )
   {
     FMenu* smenu = static_cast<FMenu*>(super_menu);
-
-    if ( smenu )
-    {
     const FPoint& p2 = smenu->termToWidgetPos(t);
     FMouseEvent* _ev = new FMouseEvent (fc::MouseMove_Event, p2, t, b);
     smenu->onMouseMove(_ev);
     delete _ev;
   }
-  }
 
   if ( isMenuBar(super_menu) )
   {
     FMenuBar* mbar = static_cast<FMenuBar*>(super_menu);
-
-    if ( mbar )
-    {
     const FPoint& p2 = mbar->termToWidgetPos(t);
     FMouseEvent* _ev = new FMouseEvent (fc::MouseMove_Event, p2, t, b);
     mbar->onMouseMove(_ev);
     delete _ev;
   }
-  }
 
   if ( isWindowsMenu(super_menu) )
   {
     FDialog* dgl = static_cast<FDialog*>(super_menu);
-
-    if ( dgl )
-    {
     const FPoint& p2 = dgl->termToWidgetPos(t);
     FMouseEvent* _ev = new FMouseEvent (fc::MouseMove_Event, p2, t, b);
     dgl->onMouseMove(_ev);
     delete _ev;
   }
-  }
 }
 
 //----------------------------------------------------------------------
@@ -588,9 +554,6 @@ void FMenuItem::onAccel (FAccelEvent* ev)
 
   FMenuBar* mbar = static_cast<FMenuBar*>(super_menu);
 
-  if ( ! mbar )
-    return;
-
   if ( menu )
   {
     FWidget* focused_widget;
@@ -635,6 +598,7 @@ void FMenuItem::onAccel (FAccelEvent* ev)
     processClicked();
     mbar->drop_down = false;
   }
+
   ev->accept();
 }
 
@@ -653,8 +617,6 @@ void FMenuItem::onFocusOut (FFocusEvent*)
   if ( super_menu && isMenuBar(super_menu) )
   {
     FMenuBar* mbar = static_cast<FMenuBar*>(super_menu);
-
-    if ( mbar )
     mbar->redraw();
   }
 
@@ -703,8 +665,9 @@ void FMenuItem::init (FWidget* parent)
 
   setGeometry (1, 1, int(text_length + 2), 1, false);
 
-  if ( parent )
+  if ( ! parent )
-  {
+    return;
+
   FMenuList* menu_list;
   setSuperMenu (parent);
 
@@ -719,15 +682,11 @@ void FMenuItem::init (FWidget* parent)
   if ( isMenuBar(parent) )  // Parent is menubar
   {
     FMenuBar* menubar_ptr = static_cast<FMenuBar*>(parent);
-
-      if ( menubar_ptr )
-      {
     menubar_ptr->calculateDimensions();
 
     if ( hotkey )  // Meta + hotkey
       menubar_ptr->addAccelerator ( fc::Fmkey_meta + std::tolower(hotkey)
                                   , this );
-      }
 
     addCallback  // for this element
     (
@@ -738,11 +697,8 @@ void FMenuItem::init (FWidget* parent)
   else if ( isMenu(parent) )  // Parent is menu
   {
     FMenu* menu_ptr = static_cast<FMenu*>(parent);
-
-      if ( menu_ptr )
     menu_ptr->calculateDimensions();
   }
-  }
 }
 
 //----------------------------------------------------------------------

src/fradiomenuitem.cpp

@@ -41,8 +41,6 @@ void FRadioMenuItem::init (FWidget* parent)
   if ( isMenu(parent) )  // Parent is menu
   {
     FMenu* menu_ptr = static_cast<FMenu*>(parent);
-
-    if ( menu_ptr )
     menu_ptr->has_checkable_items = true;
 
     addCallback  // for this element