How can I functional m_my combo box?

Question

1.00/5 (2 votes)

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how can i functional m_my combo box?

What I have tried:

void CnewprojectmengaeView::OnInitialUpdate()
{
	CView::OnInitialUpdate();

	// TODO: Add your specialized code here and/or call the base class
m_myCombo.Create(WS_CHILD | WS_VISIBLE | CBS_SIMPLE | WS_VSCROLL,
		CRect(1200, 600, 1300, 750), this, 7);
	m_myCombo.InsertString(0, _T("View"));
	m_myCombo.InsertString(1, _T("Move"));
	m_myCombo.InsertString(2, _T("Stop"));
	m_myCombo.InsertString(3, _T("Exit"));
void CnewprojectmengaeView::Onm_myCombo()
{
	// TODO: Add your implementation code here.
	if (m_myCombo.GetCurSel() == 0)
	{
		CClientDC dc(this);
		CBrush brush_black(RGB(0, 0, 0)); //Brush black the new train
		dc.FillRect(CRect(130, 171, 170, 180),
			&brush_black); //Draw train
		SetTimer(1, 30, NULL);
	}
	if (m_myCombo.GetCurSel() == 1)
	{
		CClientDC dc(this);
		CBrush brush_black(RGB(0, 0, 0)); //Brush black the new train
		CBrush brush_white(RGB(255, 255, 255)); //Brush white the old train
		dc.FillRect(CRect(X1, 171, X1 - 20, 180), &brush_black); //Draw new train
		dc.FillRect(CRect(X1 - 40, 171, X1 - 20, 180), &brush_white); //Draw the old train
		X1++; // Run the train 
		SetTimer(1, 30, NULL);
	}
	if (m_myCombo.GetCurSel() == 2)
	{
		X1--;
	}
	if (m_myCombo.GetCurSel() == 3)
	{
		exit(0);
	}
	SetTimer(1, 30, NULL);
}

Posted 16-Jan-20 2:09am

Member 14718193

Updated 16-Jan-20 3:44am

v2

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Comments

OriginalGriff 16-Jan-20 8:24am

This is not a good question - we cannot work out from that little what you are trying to do.
Remember that we can't see your screen, access your HDD, or read your mind - we only get exactly what you type to work with. And we don't have any idea what your combobox is intended to do, much less what it does or doesn't do at the moment.

Use the "Improve question" widget to edit your question and provide better information.

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CPallini · Accepted Answer · 2020-01-16T02:39:00

Quote:
if (m_myCombo.GetCurSel() == 1)
{
CClientDC dc(this);
CBrush brush_black(RGB(0, 0, 0)); //Brush black the new train
CBrush brush_white(RGB(255, 255, 255)); //Brush white the old train
dc.FillRect(CRect(X1, 171, X1 - 20, 180), &brush_black); //Draw new train
dc.FillRect(CRect(X1 - 40, 171, X1 - 20, 180), &brush_white); //Draw the old train
X1++; // Run the train
SetTimer(1, 30, NULL);
}

Painting should happen only in the OnDraw method of the CView, see Drawing in a View | Microsoft Docs[^]