Test-YTree-ncurses.cc

/*
 *  Copyright (c) 2014 Angelo Naselli <[email protected]>
 * 
 *  Permission is hereby granted, free of charge, to any person obtaining
 *  a copy of this software and associated documentation files (the
 *  "Software"), to deal in the Software without restriction, including
 *  without limitation the rights to use, copy, modify, merge, publish,
 *  distribute, sublicense, and/or sell
 *  copies of the Software, and to permit persons to whom the Software is
 *  furnished to do so, subject to the following conditions:
 * 
 *  The above copyright notice and this permission notice shall be
 *  included in all copies or substantial portions of the Software.
 * 
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
 *  SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
 *  DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 *  OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
 *  THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */


// Click on link into RichText (ncurses problem)
//
// Compile with:
//
//     g++ -I/usr/include/yui -lyui Test-YTree-ncurses.cc -o Test

#include <yui/YUI.h>
#include <yui/YApplication.h>
#include <yui/YWidgetFactory.h>
#include <yui/YDialog.h>
#include <yui/YLayoutBox.h>
#include <yui/YAlignment.h>
#include <yui/YTree.h>
#include <yui/YPushButton.h>
#include <yui/YEvent.h>


int main( int argc, char **argv )
{
  YDialog    * dialog = YUI::widgetFactory()->createMainDialog();
  YLayoutBox * vbox   = YUI::widgetFactory()->createVBox( dialog );

  YTree* tree	= YUI::widgetFactory()->createTree( vbox, "Select:" );
  tree->setNotify( true );
  YPushButton* quitButton = YUI::widgetFactory()->createPushButton( vbox, "&OK" );
  dialog->pollEvent();
    {
      YItemCollection items;
      YTreeItem *t = new YTreeItem( "Item 1" );
      new YTreeItem( t, "Item 1-2" );

      items.push_back( t );

      t = new YTreeItem( "Item 2" );

      new YTreeItem(t, "Item 2-1" );
      items.push_back(t);
      
      tree->startMultipleChanges();
      tree->deleteAllItems(); 	    
      tree->addItems( items ); // This is more efficient than repeatedly calling tree->addItem
      tree->doneMultipleChanges();
    }
  
  
  while ( true )
  {
    YEvent * event = dialog->waitForEvent();
    if ( event )
    {
      // window manager "close window" button
      if ( event->eventType() == YEvent::CancelEvent || event->widget() == quitButton )
        break; // leave event loop
      else if (event->widget() == tree)
      {
	 YItem *it = tree->selectedItem();
	 std::cout << it->label() << std::endl;
      }
    }
  }
  
  dialog->destroy();
}

1. It segfaults if dialog->pollEvent() is omitted
2. Items are shown twice (1 2 1 2, not 1 1 2 2)
   This seems to be triggered by startMultipleChanges + doneMultipleChanges; the deleteAllItems has no influence.