进度条CProgressBar类
1、CProgressBar.h
class
CProgressBar :
public
CProgressCtrl
{
// Construction
public :
CProgressBar();
CProgressBar(LPCTSTR strMessage, int nSize = 100 , int MaxValue = 100 ,
BOOL bSmooth = FALSE, int nPane = 0 );
virtual ~ CProgressBar();
BOOL Create(LPCTSTR strMessage, int nSize = 100 , int MaxValue = 100 ,
BOOL bSmooth = FALSE, int nPane = 0 );
// DECLARE_DYNCREATE(CProgressBar)
// Attributes
public :
BOOL SetRange( int nLower, int nUpper, int nStep = 1 );
BOOL SetText(LPCTSTR strMessage);
BOOL SetSize( int nSize);
COLORREF SetBarColour(COLORREF clrBar);
COLORREF SetBkColour(COLORREF clrBk);
int SetPos( int nPos);
int OffsetPos( int nPos);
int SetStep( int nStep);
int StepIt();
void Clear();
// Operations
public :
int m_nSize; // Percentage size of control
int m_nPane; // ID of status bar pane progress bar is to appear in
CString m_strMessage; // Message to display to left of control
CString m_strPrevText; // Previous text in status bar
CRect m_Rect; // Dimensions of the whole thing
CStatusBar * GetStatusBar();
BOOL Resize();
// Overrides
// ClassWizard generated virtual function overrides
// {{AFX_VIRTUAL(CProgressBar)
// }}AFX_VIRTUAL
// Implementation
public :
// Generated message map functions
protected :
// {{AFX_MSG(CProgressBar)
afx_msg BOOL OnEraseBkgnd(CDC * pDC);
// }}AFX_MSG
DECLARE_MESSAGE_MAP()
};
2、CProgressBar.cpp
{
// Construction
public :
CProgressBar();
CProgressBar(LPCTSTR strMessage, int nSize = 100 , int MaxValue = 100 ,
BOOL bSmooth = FALSE, int nPane = 0 );
virtual ~ CProgressBar();
BOOL Create(LPCTSTR strMessage, int nSize = 100 , int MaxValue = 100 ,
BOOL bSmooth = FALSE, int nPane = 0 );
// DECLARE_DYNCREATE(CProgressBar)
// Attributes
public :
BOOL SetRange( int nLower, int nUpper, int nStep = 1 );
BOOL SetText(LPCTSTR strMessage);
BOOL SetSize( int nSize);
COLORREF SetBarColour(COLORREF clrBar);
COLORREF SetBkColour(COLORREF clrBk);
int SetPos( int nPos);
int OffsetPos( int nPos);
int SetStep( int nStep);
int StepIt();
void Clear();
// Operations
public :
int m_nSize; // Percentage size of control
int m_nPane; // ID of status bar pane progress bar is to appear in
CString m_strMessage; // Message to display to left of control
CString m_strPrevText; // Previous text in status bar
CRect m_Rect; // Dimensions of the whole thing
CStatusBar * GetStatusBar();
BOOL Resize();
// Overrides
// ClassWizard generated virtual function overrides
// {{AFX_VIRTUAL(CProgressBar)
// }}AFX_VIRTUAL
// Implementation
public :
// Generated message map functions
protected :
// {{AFX_MSG(CProgressBar)
afx_msg BOOL OnEraseBkgnd(CDC * pDC);
// }}AFX_MSG
DECLARE_MESSAGE_MAP()
};
//
ProgressBar.cpp : implementation file
//
#include
"
stdafx.h
"
#include
"
StateBar.h
"
#include
"
ProgressBar.h
"
#ifdef _DEBUG
#define
new DEBUG_NEW
#undef
THIS_FILE
static
char
THIS_FILE[]
=
__FILE__;
#endif
/**/
/////////////////////////////////////////////////////////////////////////////
//
CProgressBar
CProgressBar::CProgressBar()
{
m_Rect.SetRect(0,0,0,0);
}
CProgressBar::CProgressBar(LPCTSTR strMessage,
int
nSize
/**/
/* =100 */
,
int
MaxValue
/**/
/* =100 */
, BOOL bSmooth
/**/
/* =FALSE */
,
int
nPane
/**/
/* =0 */
)
{ Create(strMessage,nSize,MaxValue,bSmooth,nPane);}
CProgressBar::
~
CProgressBar()
{ Clear();}
BEGIN_MESSAGE_MAP(CProgressBar, CProgressCtrl)
//
{{AFX_MSG_MAP(CProgressBar)
ON_WM_ERASEBKGND()
//
}}AFX_MSG_MAP
END_MESSAGE_MAP()
/**/
/////////////////////////////////////////////////////////////////////////////
//
CProgressBar message handlers
void
CProgressBar::Clear()
{ if(!IsWindow(GetSafeHwnd())) return; ModifyStyle(WS_VISIBLE,0); CString str; if(m_nPane==0) str.LoadString(AFX_IDS_IDLEMESSAGE); else str=m_strPrevText; CStatusBar* pStatusBar=GetStatusBar(); if(pStatusBar)
{ pStatusBar->SetPaneText(m_nPane,str); pStatusBar->UpdateWindow();
}}
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 CRect PaneRect; pStatusBar->GetItemRect(nPane,&PaneRect); bSuccess=CProgressCtrl::Create(dwStyle,PaneRect,pStatusBar,1); ASSERT(bSuccess); if(!bSuccess) return FALSE; SetRange(0,MaxValue); SetStep(1); m_strMessage=strMessage; m_nPane=nPane; m_nSize=nSize; m_strPrevText=pStatusBar->GetPaneText(m_nPane); Resize(); return TRUE;}
CStatusBar
*
CProgressBar::GetStatusBar()
{ CWnd *pMainWnd = AfxGetMainWnd(); //主窗口指针。多文档、单文档返回的是CMainFrame指针，对话框的是主对话框的CDialog指针 if (!pMainWnd) return NULL; // If main window is a frame window, use normal methods if (pMainWnd->IsKindOf(RUNTIME_CLASS(CFrameWnd)))//如果对象对应于该类 { CWnd* pMessageBar = ((CFrameWnd*)pMainWnd)->GetMessageBar(); return DYNAMIC_DOWNCAST(CStatusBar, pMessageBar); } // otherwise traverse children to try and find the status bar else return DYNAMIC_DOWNCAST(CStatusBar, pMainWnd->GetDescendantWindow(AFX_IDW_STATUS_BAR));}
BOOL CProgressBar::SetText(LPCTSTR strMessage)
{ m_strMessage = strMessage; return Resize(); }
BOOL CProgressBar::SetSize(
int
nSize)
{ m_nSize = nSize; return Resize();}
COLORREF CProgressBar::SetBarColour(COLORREF clrBar)
{#ifdef PBM_SETBKCOLOR if (!IsWindow(GetSafeHwnd())) return CLR_DEFAULT; return SendMessage(PBM_SETBARCOLOR, 0, (LPARAM) clrBar);#else UNUSED(clrBar); return CLR_DEFAULT;#endif}
COLORREF CProgressBar::SetBkColour(COLORREF clrBk)
{#ifdef PBM_SETBKCOLOR if (!IsWindow(GetSafeHwnd())) return CLR_DEFAULT; return SendMessage(PBM_SETBKCOLOR, 0, (LPARAM) clrBk);#else UNUSED(clrBk); return CLR_DEFAULT;#endif}
BOOL CProgressBar::SetRange(
int
nLower,
int
nUpper,
int
nStep
/**/
/* = 1 */
)
{ if (!IsWindow(GetSafeHwnd())) return FALSE; // To take advantage of the Extended Range Values we use the PBM_SETRANGE32 // message intead of calling CProgressCtrl::SetRange directly. If this is // being compiled under something less than VC 5.0, the necessary defines // may not be available.#ifdef PBM_SETRANGE32 ASSERT(-0x7FFFFFFF <= nLower && nLower <= 0x7FFFFFFF); ASSERT(-0x7FFFFFFF <= nUpper && nUpper <= 0x7FFFFFFF); SendMessage(PBM_SETRANGE32, (WPARAM) nLower, (LPARAM) nUpper);#else ASSERT(0 <= nLower && nLower <= 65535); ASSERT(0 <= nUpper && nUpper <= 65535); CProgressCtrl::SetRange(nLower, nUpper);#endif CProgressCtrl::SetStep(nStep); return TRUE;}
int
CProgressBar::SetPos(
int
nPos)
{ if (!IsWindow(GetSafeHwnd())) return 0;#ifdef PBM_SETRANGE32 ASSERT(-0x7FFFFFFF <= nPos && nPos <= 0x7FFFFFFF);#else ASSERT(0 <= nPos && nPos <= 65535);#endif ModifyStyle(0,WS_VISIBLE); return CProgressCtrl::SetPos(nPos);}
int
CProgressBar::OffsetPos(
int
nPos)
{ if (!IsWindow(GetSafeHwnd())) return 0; ModifyStyle(0,WS_VISIBLE); return CProgressCtrl::OffsetPos(nPos);}
int
CProgressBar::SetStep(
int
nStep)
{ if (!IsWindow(GetSafeHwnd())) return 0; ModifyStyle(0,WS_VISIBLE); return CProgressCtrl::SetStep(nStep); }
int
CProgressBar::StepIt()
{ if (!IsWindow(GetSafeHwnd())) return 0; ModifyStyle(0,WS_VISIBLE); return CProgressCtrl::StepIt(); }
BOOL CProgressBar::Resize()
{ if (!IsWindow(GetSafeHwnd())) //IsWindow：该函数确定给定的窗口句柄是否识别一个已存在的窗口。 //当我们想得到一个窗口对象（CWnd的派生对象）指针的句柄（HWND）时，最安全的方法是使用GetSafeHwnd()函数 return FALSE; CStatusBar *pStatusBar = GetStatusBar(); if (!pStatusBar) return FALSE; // Redraw the window text if (IsWindowVisible())//该函数获得给定窗口的可视状态 { pStatusBar->SetPaneText(m_nPane, m_strMessage);//设置StatusBar的文本 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); //使用该函数获得所选字体中指定字符串的高度和宽度 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;}
BOOL CProgressBar::OnEraseBkgnd(CDC
*
pDC)
{ Resize(); return CProgressCtrl::OnEraseBkgnd(pDC);}
| 成员函数 | 说明 |
| BOOL Success（） | 用于确定该类的构造是否成功 |
| COLORREF SetBarColour（COLORREF clrBar） | 设置进度条的填充色 |
| COLORREF SetBkColour（COLORREF clrBar） | 设置进度条的背景色 |
| int SetPos（int nPos） | 把进度条的当前位置设置为指定的值并重绘新位置 |
| int OffsetPos（int nPos） | 通过在当前位置基础上加上由nPos指定的值，并使进度条控件的当前位置向前移动，然后重绘进度条，以反映新的位置 |
| int SetStep（int nStep） | 设置进度条控件的步长增量（和StepIt函数一起使用）。在CProgressBar创建时，这个值默认为1 |
| int StepIt（） | 按通过SetStep函数指定的量使进度条的当前位置向前移动 |
| void Clear（） | 清除进度条 |
| void SetRange（int nLower，int nUpper，int nStep=1） | 设置低限、高限以及步长值 |
| void SetText（LPCTSTR strMessage） | 指定与进度条控件一起出现的文本消息，通常类似于“x%”，其中，x表示进度条的当前位置 |
| void SetSize（int nSize） | 设置进度条的水平大小 |
void
CMainFrame::OnSmooth()
{
// TODO: Add your command handler code here
CProgressBar bar(_T( " Progress " ), 40 , 10000 ,TRUE);
for ( int i = 0 ; i < 10000 ; i ++ ) {
CString str;
str.Format( " %d%% complete " , i * 100 / 10000 );
bar.SetText(str);
bar.StepIt();
PeekAndPump();
}
}
void CMainFrame::OnNsmooth()
{
// TODO: Add your command handler code here
CProgressBar bar(_T( " Progress " ), 40 , 10000 );
for ( int i = 0 ; i < 10000 ; i ++ ) {
CString str;
str.Format( " %d%% complete " , i * 100 / 10000 );
bar.SetText(str);
bar.StepIt();
PeekAndPump();
}
}
1）CProgressBar bar(_T(
"
Progress
"
),
40
,
10000
,TRUE);创建一个进度条，Progress为其开始的文本，40表示进度条的大小，10000是进度条的最大值，TRUE表示是否平滑。{
// TODO: Add your command handler code here
CProgressBar bar(_T( " Progress " ), 40 , 10000 ,TRUE);
for ( int i = 0 ; i < 10000 ; i ++ ) {
CString str;
str.Format( " %d%% complete " , i * 100 / 10000 );
bar.SetText(str);
bar.StepIt();
PeekAndPump();
}
}
void CMainFrame::OnNsmooth()
{
// TODO: Add your command handler code here
CProgressBar bar(_T( " Progress " ), 40 , 10000 );
for ( int i = 0 ; i < 10000 ; i ++ ) {
CString str;
str.Format( " %d%% complete " , i * 100 / 10000 );
bar.SetText(str);
bar.StepIt();
PeekAndPump();
}
}
2） str.Format("%d%% complete", i*100/10000);bar.SetText(str);设置进度条前面的文本，表示进度读条的百分比
3）PeekAndPump();加入该函数则进度条滚动时可以与窗口进行交互（比如改变窗口大小）