BOOL CProgressBar::Resize()
{
if (!IsWindow(GetSafeHwnd()))
return FALSE;
CStatusBar *pStatusBar = GetStatusBar();
if (!pStatusBar)
return FALSE;
// Redraw the window text
if (IsWindowVisible())
{
pStatusBar->SetPaneText(m_nPane, m_strMessage);
pStatusBar->UpdateWindow();
}
// Calculate how much space the text takes up
CClientDC dc(pStatusBar);
CFont *pOldFont = dc.SelectObject(pStatusBar->GetFont());
CSize size = dc.GetTextExtent(m_strMessage); // Length of text
int margin = dc.GetTextExtent(_T(" ")).cx * 2; // Text margin
dc.SelectObject(pOldFont);
// Now calculate the rectangle in which we will draw the progress bar
CRect rc;
pStatusBar->GetItemRect(m_nPane, rc);
// Position left of progress bar after text and right of progress bar
// to requested percentage of status bar pane
if (!m_strMessage.IsEmpty())
rc.left += (size.cx + 2*margin);
rc.right -= (rc.right - rc.left) * (100 - m_nSize) / 100;
if (rc.right < rc.left) rc.right = rc.left;
// Leave a litle vertical margin (10%) between the top and bottom of the bar
int Height = rc.bottom - rc.top;
rc.bottom -= Height/10;
rc.top += Height/10;
// If the window size has changed, resize the window
if (rc != m_Rect)
{
MoveWindow(&rc);
m_Rect = rc;
}
return TRUE;
}
void CProgressBar::Clear()
{
if (!IsWindow(GetSafeHwnd()))
return;
// Hide the window. This is necessary so that a cleared
// window is not redrawn if "Resize" is called
ModifyStyle(WS_VISIBLE, 0);
CString str;
if (m_nPane == 0)
str.LoadString(AFX_IDS_IDLEMESSAGE); // Get the IDLE_MESSAGE
else
str = m_strPrevText; // Restore previous text
// Place the IDLE_MESSAGE in the status bar
CStatusBar *pStatusBar = GetStatusBar();
if (pStatusBar)
{
pStatusBar->SetPaneText(m_nPane, str);
pStatusBar->UpdateWindow();
}
}
