unit1.cpp

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//---------------------------------------------------------------------------
#include <vcl.h>
#pragma hdrstop

#include "Unit1.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
        : TForm(Owner)
{
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Button1Click(TObject *Sender)
{
  AnsiString Str[12];
  int StrCount;
  int ii;
  AnsiString ss1;
  TTreeNode *Node[6],*NNode;
  int lastw=3,NodeID=0;

  Str[0]="101";
  Str[1]="101001";
  Str[2]="101001001";
  Str[3]="101001002";
  Str[4]="102";
  Str[5]="102001";
  Str[6]="102002";
  Str[7]="103";
  Str[8]="103001";
  Str[9]="103001001";
  Str[10]="103001001001";
  StrCount=11;

  Node[0]=TreeView1->Items->GetFirstNode();
  TreeView1->Items->Clear();
  for(ii=0;ii<StrCount;ii++)
  {
    ss1=Str[ii];
    if(ss1.Length()==lastw)
    {
      Node[NodeID]=TreeView1->Items->Add(Node[NodeID],ss1);
      NNode=Node[NodeID];
    }
    else if(ss1.Length()>lastw)
    {
      Node[NodeID+1]=TreeView1->Items->AddChild(Node[NodeID],ss1);
      NNode=Node[NodeID+1];
      lastw=ss1.Length();
      NodeID++;
    }
    else
    {
      lastw=ss1.Length();
      NodeID=lastw/3-1;
      Node[NodeID]=TreeView1->Items->Add(Node[NodeID],ss1);
      NNode=Node[NodeID];
    }
  }
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Button2Click(TObject *Sender)
{
  AnsiString Str[12];
  int StrCount;
  int ii;
  AnsiString ss1;
  TTreeNode *Node[6],*NNode;
  int lastw=3,NodeID=0;

  Str[0]="101";
  Str[1]="101001";
  Str[2]="101001001";
  Str[3]="101001002";
  Str[4]="102";
  Str[5]="102001";
  Str[6]="102002";
  Str[7]="103";
  Str[8]="103001";
  Str[9]="103001001";
  Str[10]="103001001001";
  StrCount=11;

  Node[0]=TreeView1->Items->GetFirstNode();
  TreeView1->Items->Clear();
  for(ii=0;ii<StrCount;ii++)
  {
    ss1=Str[ii];
    if(ss1.Length()==lastw)
    {
      Node[NodeID]=TreeView1->Items->Add(Node[NodeID],ss1);
      NNode=Node[NodeID];
      NNode->ImageIndex=0;NNode->SelectedIndex=1;
    }
    else if(ss1.Length()>lastw)
    {
      Node[NodeID+1]=TreeView1->Items->AddChild(Node[NodeID],ss1);
      NNode=Node[NodeID+1];
      NNode->ImageIndex=0;NNode->SelectedIndex=1;
      lastw=ss1.Length();
      NodeID++;
    }
    else
    {
      lastw=ss1.Length();
      NodeID=lastw/3-1;
      Node[NodeID]=TreeView1->Items->Add(Node[NodeID],ss1);
      NNode=Node[NodeID];
      NNode->ImageIndex=0;NNode->SelectedIndex=1;
    }
  }
}
//---------------------------------------------------------------------------

void __fastcall TForm1::Button3Click(TObject *Sender)
{
  TTreeNode *Node;
  AnsiString ass;
  int idx;

  Node=TreeView1->Selected;
  if(Node!=NULL)
  {
    idx=TreeView1->Selected->AbsoluteIndex;
    if(TreeView1->Items->Item[idx]->HasChildren==False)
    {
      ass=TreeView1->Items->Item[idx]->Text;
      ShowMessage(ass);
    }
    else
      ShowMessage("has Child");
  }
}
//---------------------------------------------------------------------------