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list_box.h

Go to the documentation of this file.

// Author:  Daniel Albuschat ( daniel@viming.de ) 
// File:    list_box.h
// Date:    Tue May 13 20:48:22 20030
// Content:  

#ifndef LIST_BOX_H_1640654124
#define LIST_BOX_H_1640654124
#include "base_control.h"
#include "events.h"
#include <string>
#include <vector>

namespace crs {

  template< class T>
    class list_box: public focused_ctrl, public styled_ctrl {
      public:
        struct items {
          std::string text;
          T           value;
          items( const std::string Text, const T Value ): text(Text), value(Value){
          }
        };
        typedef std::vector<items> val_list;
      private:
        val_list mList;
        typename val_list::const_iterator mSelected;
        const val_list &getList() {
          return mList;
        }
        void setList( const val_list &List ) {
          mList = List;
          mSelected = mList.begin();
        }
        const typename val_list::const_iterator &getSelected() {
          return mSelected;
        }
        void setSelected( const typename val_list::const_iterator &it ) {
          mSelected = it;
        }
      public:

        list_box( base_control *Parent, window_events *Events=0, 
            const unsigned int Left=0, const unsigned int Top=0, const unsigned int Width=0, const unsigned int Height=0, 
            style::styles Style = style::rect, chtype clb = '[', chtype crb = ']' ): 
          focused_ctrl( Parent, Events, Left, Top, Width, Height ),
        styled_ctrl( Style, clb, crb ),
        list( this, &list_box::getList, &list_box::setList ),
        selected( this, &list_box::getSelected, &list_box::setSelected ) {
          mSelected = mList.begin();
        }


        list_box( base_control *Parent, const val_list List, window_events *Events=0, 
            const unsigned int Left=0, const unsigned int Top=0, const unsigned int Width=0, const unsigned int Height=0, 
            style::styles Style = style::rect, chtype clb = '[', chtype crb = ']' ): 
          focused_ctrl( Parent, Events, Left, Top, Width, Height ),
        styled_ctrl( Style, clb, crb ),
        mList(List),
        mSelected(mList.begin()),
        list( this, &list_box::getList, &list_box::setList ),
        selected( this, &list_box::getSelected, &list_box::setSelected ) {
        }
        virtual void draw() {
          buffer.fill(' ');
          int c=0;
          for( typename std::vector< items >::iterator i = mList.begin(); i != mList.end(); i++ ) {
            c++;
            buffer.setText( i->text, 2, c );
            if( i == mSelected ) {
              buffer[ mWidth * c + 1 ] = sc::getLeftBorder( mStyle, custom_left_border );
              buffer[ mWidth * (c + 1) - 2 ] = sc::getRightBorder( mStyle, custom_right_border );
            }
          }
          buffer.drawHLine( 1, 0, mWidth - 2, sc::HorizontalLine );           // upper border
          buffer.drawHLine( 1, mHeight - 1, mWidth - 2, sc::HorizontalLine ); // lower border
          buffer[ 0 ] = sc::UpperLeftCorner;                                  // upper left corner
          buffer[ mWidth - 1 ] = sc::UpperRightCorner;                        // upper right corner
          buffer[ ( mHeight - 1 ) * mWidth ] = sc::LowerLeftCorner;           // lower left corner
          buffer[ mHeight * mWidth - 1 ] = sc::LowerRightCorner;              // lower right corner
          buffer.drawVLine( 0, 1, mHeight - 2, sc::VerticalLine );            // left border
          buffer.drawVLine( mWidth - 1, 1, mHeight - 2, sc::VerticalLine );   // right border
        }
        virtual bool keyPress( int key ) {
          switch(key) {
            case KEY_DOWN:
              if( mSelected != mList.end()-1 )
                mSelected++;
              break;
            case KEY_UP:
              if( mSelected != mList.begin() )
                mSelected--;
              break;
            default:
              return true;
          }
          return false;
        }
        typename val_list::const_iterator push_back( const items Items ) {
          mSelected = mList.insert( mList.begin(), Items );
          return mSelected;
        }
        property< list_box, read_write, val_list > list;
        property< list_box, read_write, typename val_list::const_iterator > selected;
    };

}

#endif

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