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;
}
// Create the CProgressCtrl as a child of the status bar positioned
// over the first pane, extending "nSize" percentage across pane.
// Sets the range to be 0 to MaxValue, with a step of 1.
BOOL CProgressBar::Create(LPCTSTR strMessage, int nSize /*=100*/,
int MaxValue /*=100*/, BOOL bSmooth /*=FALSE*/,
int nPane /*=0*/)
{
BOOL bSuccess = FALSE;
CStatusBar *pStatusBar = GetStatusBar();
if (!pStatusBar)
return FALSE;
DWORD dwStyle = WS_CHILD|WS_VISIBLE;
#ifdef PBS_SMOOTH
if (bSmooth)
dwStyle |= PBS_SMOOTH;
#endif
// Until m_nPane is initialized, Resize() must not be called. But it can be called (which
// happens in multi-threaded programs) in CProgressBar::OnEraseBkgnd after the control is
// created in CProgressBar::Create.
m_strMessage = strMessage;
m_nSize = nSize;
m_nPane = nPane;
m_strPrevText = pStatusBar->GetPaneText(m_nPane);
// Get CRect coordinates for requested status bar pane
CRect PaneRect;
pStatusBar->GetItemRect(nPane, &PaneRect);
// Create the progress bar
bSuccess = CProgressCtrl::Create(dwStyle, PaneRect, pStatusBar, 1);
ASSERT(bSuccess);
if (!bSuccess)
return FALSE;
// Set range and step
SetRange(0, MaxValue);
SetStep(1);
m_strMessage = strMessage;
m_nSize = nSize;
m_nPane = nPane;
m_strPrevText = pStatusBar->GetPaneText(m_nPane);
// Resize the control to its desired width
Resize();
return TRUE;
}
// Create the CProgressCtrl as a child of the status bar positioned
// over the first pane, extending "nSize" percentage across pane.
// Sets the range to be 0 to MaxValue, with a step of 1.
BOOL CProgressBar::Create(LPCTSTR strMessage, int nSize /*=100*/,
int MaxValue /*=100*/, BOOL bSmooth /*=FALSE*/,
int nPane /*=0*/)
{
BOOL bSuccess = FALSE;
CStatusBar *pStatusBar = GetStatusBar();
if (!pStatusBar)
return FALSE;
DWORD dwStyle = WS_CHILD|WS_VISIBLE;
#ifdef PBS_SMOOTH
if (bSmooth)
dwStyle |= PBS_SMOOTH;
#endif
// Get CRect coordinates for requested status bar pane
CRect PaneRect;
pStatusBar->GetItemRect(nPane, &PaneRect);
// Create the progress bar
bSuccess = CProgressCtrl::Create(dwStyle, PaneRect, pStatusBar, 1);
ASSERT(bSuccess);
if (!bSuccess)
return FALSE;
// Set range and step
SetRange(0, MaxValue);
SetStep(1);
m_strMessage = strMessage;
m_nSize = nSize;
m_nPane = nPane;
m_strPrevText = pStatusBar->GetPaneText(m_nPane);
// Resize the control to its desired width
Resize();
return TRUE;
}
