Firemonkey: TGrid usage on Embarcadero C++ Builder XE3

Question

I\'m try to build a tool that reads data from a database and displays it as a table using a TGrid in Firemonkey. I need to use different types of columns like TCheckColumn and T

Answer 1

In order to solve your problem, redefine the TCheckCell class in the following way:

#include 
#include 

class CheckCellClass:public TCheckCell
{
public:
 __fastcall virtual CheckCellClass(System::Classes::TComponent*AOwner):TCheckCell(AOwner)
 {
 };

 virtual System::Rtti::TValue __fastcall GetData(void)
 {
  return TValue::From(this->IsChecked);
 };

 virtual void __fastcall SetData(const TValue&Value)
 {
  TValue V(Value);
  this->IsChecked=V.AsBoolean();
 };
};

//Redifine TCheckColumn class
class CheckColumnClass:public TCheckColumn
{
private:
 virtual Fmx::Controls::TStyledControl*__fastcall CreateCellControl(void)
 {
  CheckCellClass*Cell=new CheckCellClass(this);
  Cell->OnChange     =&(this->DoCheckChanged);
  return Cell;
 };

public:
__fastcall CheckColumnClass(System::Classes::TComponent*AOwner):TCheckColumn(AOwner)
 {
 };
};

//global Data for Save curent State Cell

boost::dynamic_bitsetFullDiscreteInputs;

Add To Grid In Constuctor
 FullDiscreteInputs.resize(100);
 DiscreteInputsGrid->RowCount=FullDiscreteInputs.size();    
 CheckColumnClass* DiscreteInPutsCheckColumn        =new CheckColumnClass(DiscreteInputsGrid);
 DiscreteInputsGrid->AddObject(CoilsCheckColumn);

void __fastcall TForm1::DiscreteInputsGridGetValue(TObject*Sender, const int Col, const int Row,TValue&Value)
{
 //...

 if(DiscreteInputsGrid->ColumnByIndex(Col)==DiscreteInPutsCheckColumn)
 {
 Value=TValue::From(FullDiscreteInputs[Row]);
 }
 //...
}

//---------------------------------------------------------------------------
void __fastcall TForm1::DiscreteInputsGridSetValue(TObject*Sender, const int Col, const int Row, const TValue&Value)
{
 TValue V(Value);
 if(DiscreteInputsGrid->ColumnByIndex(Col)==DiscreteInPutsCheckColumn)
 {
 FullDiscreteInputs[Row]=V.AsBoolean();
 }
}
//---------------------------------------------------------------------------