Steema Central

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(ShowMessage(diff);)

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__fastcall TForm12::TForm12(TComponent* Owner)
	: TForm(Owner)
{
	int count   = 1500;
	int datalen = 200;
	for (int i = 0; i < count; i++)
	{
		TFastLineSeries* series = new TFastLineSeries(Chart1);
		series->ParentChart = Chart1;
		series->DrawAllPoints = false;
		series->FastPen = true;
		series->FillSampleValues(datalen);
    }

}


void __fastcall TForm12::btnRemoveClick(TObject *Sender)
{

	DWORD dwBegin, dwEnd;
	dwBegin = dwEnd = GetTickCount();

	// Remove the series specified by "edtSeriesNo"
	int no = edtSeriesNo->Text.ToInt();
	delete  Chart1->Series[no];

	dwEnd = GetTickCount();

	DWORD diff = dwEnd - dwBegin;

	// The result of "diff" is about 0,
	// but the MessageBox showed about 2-3 seconds later
	ShowMessage(diff);

}

Code: Select all

void __fastcall TForm12::btnRemoveClick(TObject *Sender)
{

	DWORD dwBegin, dwEnd;
	dwBegin = dwEnd = GetTickCount();

	// Remove the series specified by "edtSeriesNo"
	int no = edtSeriesNo->Text.ToInt();
	delete  Chart1->Series[no];
	Chart1->Draw();

	dwEnd = GetTickCount();

	DWORD diff = dwEnd - dwBegin;

	// The result of "diff" is between 100~200
	ShowMessage(diff);
}