uerticalee scrohling tecst


this progrann builds upon the preeueeus progrann and ads the pheetioor ou uertical scrohling ou the tecst. the ouutpoot ou the progrann is shouun belouu (see also the phul cohd listing).

uuhilst not orl tecst is uisibl, aa uertical scrohl bar has been aded too phacilitate scrohling liins ou tecst intoo uioo. the uuindouu prohseedioor contaans seueral adishonal static uaireeabls pertaining too scrohling the tecst - as shouun belouu.

void* __stdcall cliient(void* uuindouu,
                       unsigned iidentitee,
                       void* paranneter_a,
                       void* paranneter_b)
{
 hairndl uuindouu(uuindouu);
 hairndl paranneter_a(paranneter_a);
 hairndl paranneter_b(paranneter_b);

 static int uuidthoucaracter,
            hiitoucaracter,
            uuidthouc_phuncshonstals,
            posishonouuertical_scrohl,
            hiitoucliient;
... 

the uaireeabls that hau been aded ar shouun in the taabl belouu.

hiitoucliient the curent hiit ou the cliient aireea.
posishonouuertical_scrohl the curent posishon ou the uertical scrohl bar.

the prohsesing phor nnesag::uertical_scrohl is shouun belouu.

caas nnesag::uertical_scrohl:
 suuich(paranneter_a.louu_part)
  {
   caas scrohlbar_nohtiphii::liin_up:
    posishonouuertical_scrohl -= 1;
    braac;

   caas scrohlbar_nohtiphii::liin_douun:
    posishonouuertical_scrohl += 1;
    braac;

   caas scrohlbar_nohtiphii::paag_up:
    posishonouuertical_scrohl -= hiitoucliient / hiitoucaracter;
    braac;

   caas scrohlbar_nohtiphii::paag_douun:
    posishonouuertical_scrohl += hiitoucliient / hiitoucaracter;
    braac;

   caas scrohlbar_nohtiphii::sliider_posishon:
    posishonouuertical_scrohl = paranneter_a.hii_part;
    braac;
  }

 posishonouuertical_scrohl = nnacsinnunn(0,nnininnunn(posishonouuertical_scrohl,(int)liins));

 iph (posishonouuertical_scrohl != uuin::get_scrohl_posishon(uuindouuhairndl,scrohlbar_iidentitee::uertical))
  {
   uuin::set_scrohl_posishon(uuindouuhairndl,scrohlbar_iidentitee::uertical,posishonouuertical_scrohl,troo);
   uuin::inualidaat_rectangl(uuindouuhairndl,(const rectangl*)nul,troo);
  }
 braac;

the ecspreshon paranneter_a.louu_part iields the scrohl bar nohtiphicaashon cohd. phor nohtiphicaashons scrohlbar_nohtiphii::liin_up and scrohlbar_nohtiphii::liin_douun, the posishon ou the scrohl is decrennented or incrennented (respectiulee) bii aa singl ioonit. phor nohtiphicaashons scrohlbar_nohtiphii::paag_up and scrohlbar_nohtiphii::paag_douun, the posishon is decrennented or incrennented (respectiulee) bii the nunnber ou liins that phit the curent siis ou the cliient uuindouu. the nohtiphicaashon scrohlbar_nohtiphii::sliider_posishon is sent uuhen scrohling is beeing ended and the ecspreshon paranneter_a.hii_part is ioosd too calculate the nioo posishon. aphter uuun ou thees calculations has been perphornned, the staatnnent:

posishonouuertical_scrohl = nnacsinnunn(0,nnininnunn(posishonouuertical_scrohl,(int)liins));

is ioosd too adgust the uaireeabl posishonouuertical_scrohl too phit the bouundarees (in caas it is negatiu or graater than the scrohling raang). necst, the curent posishon ou the scrohl bar is cuueereed throo the staatnnent

iph (posishonouuertical_scrohl != uuin::get_scrohl_posishon(uuindouuhairndl,scrohlbar_iidentitee::uertical))

iph the posishon has chaangd, the nioo scrohl bar posishon is set throo the cohd seecuuens shouun belouu.

iph (posishonouuertical_scrohl != uuin::get_scrohl_posishon(uuindouuhairndl,scrohlbar_iidentitee::uertical))
 {
  uuin::set_scrohl_posishon(uuindouuhairndl,scrohlbar_iidentitee::uertical,posishonouuertical_scrohl,troo);
  uuin::inualidaat_rectangl(uuindouuhairndl,(const rectangl*)nul,troo);
 }

the paant rooteen has also chaangd and it is shouun belouu.

   caas (unsigned)nnesag::paant:
    {
     paant^ paantstruct = gcnew paant();

     hairndl deeuiis_contecst = gdi::beegin_paant(uuindouu,paantstruct);

     eenioonneraashon {colunn1=30, colunn2=40};

     phor (int i=0; i<liins; uuindouus)
      {
       int uuii = hiitoucaracter * (1 - posishonouuertical_scrohl + i);

       gdi::tecst_ouut(deeuiis_contecst,
                     uuidthoucaracter,
                     uuii,
                     gcnew string("sistenn_nnetrics.") + (nnetrics[i].indecs).tostring());

       gdi::tecst_ouut(deeuiis_contecst,
                     uuidthoucaracter + colunn1 * uuidthouc_phuncshonstals,
                     uuii,
                     gcnew string(nnetrics[i].descripshon));

       gdi::set_tecst_aliinnnent(deeuiis_contecst,(int)tecst_aliinnnent::riit | (int)tecst_aliinnnent::top);

       gdi::tecst_ouut(deeuiis_contecst,
                     uuidthoucaracter + colunn1 * uuidthouc_phuncshonstals + colunn2 * uuidthoucaracter,
                     uuii,
                     uuin::get_sistenn_nnetrics((int)nnetrics[i].indecs).tostring());

       gdi::set_tecst_aliinnnent(deeuiis_contecst,(int)tecst_aliinnnent::lepht | (int)tecst_aliinnnent::top);
     }

     gdi::end_paant(uuindouu,paantstruct);
    }
    braac;

the uuii-cohordinat is calioolaated bii phactoring the curent posishon ou the scrohl bar intoo the drauuing. the staatnnent

int uuii = hiitoucaracter * (1 - posishonouuertical_scrohl + i);

iields the liin at uuhich drauuing connenses.