基本的皮筋用法

MFC代码：

BOOL CDlgTest::OnInitDialog()

{

CDialog::OnInitDialog();

// TODO:  在此添加额外的初始化

m_tracker.m_nStyle = CRectTracker::resizeOutside | CRectTracker::solidLine;

m_tracker.m_nHandleSize = 6;

m_tracker.m_rect.SetRect(0,0,100,100);

return TRUE;  // return TRUE unless you set the focus to a control

// 异常: OCX 属性页应返回 FALSE

}

BOOL CDlgTest::OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message)

{

// TODO: 在此添加消息处理程序代码和/或调用默认值

if (m_tracker.SetCursor(pWnd, nHitTest)) {

return TRUE;

}

return CDialog::OnSetCursor(pWnd, nHitTest, message);

}

void CDlgTest::OnLButtonDown(UINT nFlags, CPoint point)

{

// TODO: 在此添加消息处理程序代码和/或调用默认值

if (m_tracker.HitTest(point) < 0) {

//m_tracker.TrackRubberBand(this, point);

} else {

m_tracker.Track(this, point, TRUE);

m_edit.MoveWindow(&m_tracker.m_rect);

if (m_lastWidth > 0) {

float x = (float)m_tracker.m_rect.Size().cx / (float) m_lastWidth;

int n = x * 100;

m_edit.PostMessage(EM_SETZOOM, n, 100);

}

else {

m_lastWidth = m_tracker.m_rect.Size().cx;

}

}

Invalidate();

CDialog::OnLButtonDown(nFlags, point);

}

void CDlgTest::OnPaint()

{

CPaintDC dc(this); // device context for painting

// TODO: 在此处添加消息处理程序代码

// 不为绘图消息调用 CDialog::OnPaint()

m_tracker.Draw(&dc);

}