HideScrollBars (C++)

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Description

This example requires: TRichEdit, TRadioGroup, TCheckBox, and TButton. Clicking the Radio Group control sets the ScrollBar style of the RichEdit. Toggling the Check Box turns HideScrollBars on and off. Clicking the button loads the Rich Edit with a large amount of contiguous text.

Code

void __fastcall TForm1::Button1Click(TObject *Sender)
{
  RichEdit1->Lines->Clear();
  for (int i = 0; i < 500; i++)
  {
	RichEdit1->Text = RichEdit1->Text + String("This is sentence ") + IntToStr(i) + ".  ";
	if ((i % 2) == 0) {
	  RichEdit1->Text = RichEdit1->Text + String("\n");
	}
  }
  RichEdit1->SelStart = 0; // Move text cursor to the top of the edit.
}

void __fastcall TForm1::CheckBox1Click(TObject *Sender)
{
  RichEdit1->HideScrollBars = CheckBox1->Checked;
}

void __fastcall TForm1::RadioGroup1Click(TObject *Sender)
{
  TScrollStyle ScrollBarA[4] = {ssBoth, ssHorizontal, ssNone, ssVertical };
  RichEdit1->ScrollBars = ScrollBarA[RadioGroup1->ItemIndex];
}

__fastcall TForm1::TForm1(TComponent* Owner)
  : TForm(Owner)
{
  RadioGroup1->Caption = "Scroll Bars";
  RadioGroup1->Items->Clear();
  RadioGroup1->Items->Add("ssBoth");
  RadioGroup1->Items->Add("ssHorizontal");
  RadioGroup1->Items->Add("ssNone");
  RadioGroup1->Items->Add("ssVertical");
  CheckBox1->Caption = "Hide Scroll Bars";
  CheckBox1->Checked = true;
  Button1->Caption = "Load Text";
  RichEdit1->Text = "Just a little text.";
  RichEdit1->WordWrap = False;
}

Uses

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