CMFCStatusBar Class

Artikel
08/03/2021

The CMFCStatusBar class implements a status bar similar to the CStatusBar class. However, the CMFCStatusBar class has features not offered by the CStatusBar class, such as the ability to display images, animations, and progress bars; and the ability to respond to mouse double-clicks.

For more detail see the source code located in the VC\atlmfc\src\mfc folder of your Visual Studio installation.

Syntax

class CMFCStatusBar : public CPane

Members

Public Methods

Name	Description
CMFCStatusBar::CalcFixedLayout	(Overrides CBasePane::CalcFixedLayout.)
CMFCStatusBar::CommandToIndex
CMFCStatusBar::Create	Creates a control bar and attaches it to the CPane object. (Overrides CPane::Create.)
CMFCStatusBar::CreateEx	Creates a control bar and attaches it to the CPane object. (Overrides CPane::CreateEx.)
CMFCStatusBar::DoesAllowDynInsertBefore	Determines whether another pane can be dynamically inserted between this pane and the parent frame. (Overrides CBasePane::DoesAllowDynInsertBefore.)
CMFCStatusBar::EnablePaneDoubleClick	Enables or disables the handling of mouse double-clicks on the status bar.
CMFCStatusBar::EnablePaneProgressBar	Displays a progress bar on the specified pane.
CMFCStatusBar::GetCount	Returns the number of panes on the status bar.
CMFCStatusBar::GetDrawExtendedArea
CMFCStatusBar::GetExtendedArea
CMFCStatusBar::GetItemID
CMFCStatusBar::GetItemRect
CMFCStatusBar::GetPaneInfo
CMFCStatusBar::GetPaneProgress
CMFCStatusBar::GetPaneStyle	Returns the pane style. (Overrides CBasePane::GetPaneStyle.)
CMFCStatusBar::GetPaneText
CMFCStatusBar::GetPaneWidth	Returns the width, in pixels, of the specified pane of the status bar.
CMFCStatusBar::GetTipText	Returns the tool tip text for the specified pane of the status bar.
CMFCStatusBar::InvalidatePaneContent	Invalidates the specified pane and redraws its content.
CMFCStatusBar::PreCreateWindow	Called by the framework before the creation of the Windows window attached to this `CWnd` object. (Overrides CWnd::PreCreateWindow.)
CMFCStatusBar::SetDrawExtendedArea
CMFCStatusBar::SetIndicators
CMFCStatusBar::SetPaneAnimation	Assigns an animation to the specified pane.
CMFCStatusBar::SetPaneBackgroundColor	Sets the background color for the specified pane of the status bar.
CMFCStatusBar::SetPaneIcon	Sets the indicator icon for the specified pane of the status bar.
CMFCStatusBar::SetPaneInfo
CMFCStatusBar::SetPaneProgress	Sets the current progress of the progress bar for the specified pane of the status bar.
CMFCStatusBar::SetPaneStyle	Sets the style of the pane. (Overrides CBasePane::SetPaneStyle.)
CMFCStatusBar::SetPaneText
CMFCStatusBar::SetPaneTextColor	Sets the text color for the specified pane of the status bar.
CMFCStatusBar::SetPaneWidth	Sets the width in pixels of the specified pane of the status bar.
CMFCStatusBar::SetTipText	Sets the tool tip text for the specified pane of the status bar.

Protected Methods

Name	Description
CMFCStatusBar::OnDrawPane	Called by the framework when it redraws the pane of the status bar.

Remarks

The following diagram shows a figure of the status bar from Status Bar Demo sample application.

Example of CMFCStatusBar.

Examples

The following example demonstrates the local variables that the application uses to call various methods in the CMFCStatusBar class. These variables are declared in StatusBarDemoView.h. The main frame is declared in MainFrm.h, the document is declared in StatusBarDemoDoc.h, and the view is declared in StatusBarDemoView.h. This code snippet is part of the Status Bar Demo sample.

int m_nProgressCurr;
BOOL m_bInProgress;

CImageList m_imlStatusAnimation;
BOOL m_bInAnimation;

CBitmap m_bmpIcon1;
CBitmap m_bmpIcon2;

The following example demonstrates how to get a reference to CMFCStatusBar object by introducing the GetStatusBar method in MainFrm.h and then calling this method from the GetStatusBar method in StatusBarDemoView.h. This code snippet is part of the Status Bar Demo sample.

// in MainFrm.h
public:
CMFCStatusBar &GetStatusBar()
{
   return m_wndStatusBar;
}

// in StatusBarDemoView.h
CMFCStatusBar &GetStatusBar() const
{
   return ((CMainFrame *)AfxGetMainWnd())->GetStatusBar();
}

The following example demonstrates how to call various methods in the CMFCStatusBar class in StatusBarDemoView.cpp. The constants are declared in MainFrm.h. The example shows how to set the icon, set the tooltip text of the status bar pane, display a progress bar on the specified pane, assign an animation to the specified pane, set the text and the width of the status bar pane, and set the current progress indicator of the progress bar for the status bar pane. This code snippet is part of the Status Bar Demo sample.

// in MainFrm.h
const int nStatusIcon = 0;
const int nStatusInfo = 1;
const int nStatusProgress = 2;
const int nStatusLabel = 3;
const int nStatusAnimation = 4;

// in StatusBarDemoView.cpp
GetStatusBar().SetPaneIcon(nStatusIcon, m_bmpIcon1);
GetStatusBar().SetTipText(nStatusIcon, _T("This is a tooltip"));

GetStatusBar().EnablePaneProgressBar(nStatusProgress, PROGRESS_MAX);

GetStatusBar().SetPaneAnimation(nStatusAnimation, NULL);

GetStatusBar().SetPaneAnimation(nStatusAnimation, m_imlStatusAnimation);
GetStatusBar().SetPaneText(nStatusAnimation, _T(""));
GetStatusBar().SetPaneWidth(nStatusAnimation, 16);

GetStatusBar().SetPaneProgress(nStatusProgress, m_nProgressCurr);

Inheritance Hierarchy

Requirements

Header: afxstatusbar.h

CMFCStatusBar::CalcFixedLayout

virtual CSize CalcFixedLayout(
    BOOL bStretch,
    BOOL bHorz);

Parameters

[in] bStretch
[in] bHorz

Return Value

Remarks

CMFCStatusBar::CommandToIndex

int CommandToIndex(UINT nIDFind) const;

Parameters

[in] nIDFind

Return Value

Remarks

CMFCStatusBar::Create

BOOL Create(
    CWnd* pParentWnd,
    DWORD dwStyle = WS_CHILD | WS_VISIBLE | CBRS_BOTTOM,
    UINT nID = AFX_IDW_STATUS_BAR);

Parameters

[in] pParentWnd
[in] dwStyle
[in] nID

Return Value

Remarks

CMFCStatusBar::CreateEx

BOOL CreateEx(
    CWnd* pParentWnd,
    DWORD dwCtrlStyle = 0,
    DWORD dwStyle = WS_CHILD | WS_VISIBLE | CBRS_BOTTOM,
    UINT nID = AFX_IDW_STATUS_BAR);

Parameters

[in] pParentWnd
[in] dwCtrlStyle
[in] dwStyle
[in] nID

Return Value

Remarks

CMFCStatusBar::DoesAllowDynInsertBefore

virtual BOOL DoesAllowDynInsertBefore() const;

Return Value

Remarks

CMFCStatusBar::EnablePaneDoubleClick

Enables or disables the handling of mouse double-clicks on the status bar.

void EnablePaneDoubleClick(BOOL bEnable=TRUE);

Parameters

bEnable
[in] If TRUE, enable the processing of the mouse double-click. Otherwise disable the processing of the mouse double-click.

Remarks

If the status bar is enabled to process double clicks, Windows sends the WM_COMMAND notification together with a resource ID to the owner of the status bar every time that the user double clicks on the status bar pane.

CMFCStatusBar::EnablePaneProgressBar

Display a progress bar on the specified pane.

void EnablePaneProgressBar(
    int nIndex,
    long nTotal=100,
    BOOL bDisplayText=FALSE,
    COLORREF clrBar=-1,
    COLORREF clrBarDest=-1,
    COLORREF clrProgressText=-1);

Parameters

nIndex
[in] Specifies the index of the pane whose progress bar to enable.

nTotal
[in] Specifies the maximum value for the progress bar.

bDisplayText
[in] Specifies whether the progress bar should display the current progress value.

clrBar
[in] Specifies the background color of the progress bar.

clrBarDest
[in] Specifies the secondary color of the progress bar background. Use different value than clrBar to fill by a color blended into a gradient.

clrProgressText
[in] Specifies the color of the text of the progress bar.

Remarks

If you want to disable the progress bar call EnablePaneProgressBar with nTotal set to -1. By default nTotal is set to 100. Therefore, you do not need any additional calculations to display progress as percentage.

You should pass different values for clrBar and clrBarDest so that the background color of the progress bar displays a color blended into a gradient. .

To set the current progress, call the CMFCStatusBar::SetPaneProgress method.

CMFCStatusBar::GetCount

Retrieves the number of panes in the status bar.

int GetCount() const;

Return Value

The number of panes in the status bar.

CMFCStatusBar::GetDrawExtendedArea

BOOL GetDrawExtendedArea() const;

Return Value

Remarks

CMFCStatusBar::GetExtendedArea

virtual BOOL GetExtendedArea(CRect& rect) const;

Parameters

[in] rect

Return Value

Remarks

CMFCStatusBar::GetItemID

UINT GetItemID(int nIndex) const;

Parameters

[in] nIndex

Return Value

Remarks

CMFCStatusBar::GetItemRect

void GetItemRect(
    int nIndex,
    LPRECT lpRect) const;

Parameters

[in] nIndex
[in] lpRect

Remarks

CMFCStatusBar::GetPaneInfo

void GetPaneInfo(
    int nIndex,
    UINT& nID,
    UINT& nStyle,
    int& cxWidth) const;

Parameters

[in] nIndex
[in] nID
[in] nStyle
[in] cxWidth

Remarks

CMFCStatusBar::GetPaneProgress

long GetPaneProgress(int nIndex) const;

Parameters

[in] nIndex

Return Value

Remarks

CMFCStatusBar::GetPaneStyle

UINT GetPaneStyle(int nIndex) const;

Parameters

[in] nIndex

Return Value

Remarks

CMFCStatusBar::GetPaneText

void GetPaneText(
    int nIndex,
    CString& s) const;

CString GetPaneText(int nIndex) const;

Parameters

[in] nIndex
[in] s

Return Value

Remarks

CMFCStatusBar::GetPaneWidth

Retrieves the width of the pane of a status bar.

int GetPaneWidth(int nIndex) const;

Parameters

nIndex
[in] Specifies the index of the status bar pane.

Return Value

The width of the status bar pane that nIndex specifies; otherwise, zero if a status-bar pane does not exist.

CMFCStatusBar::GetTipText

Retrieve the tooltip text of a status bar's pane.

CString GetTipText(int nIndex) const;

Parameters

nIndex
[in] Specifies the index of the pane for which to retrieve tool tip text.

Return Value

The tooltip text of the status-bar pane that nIndex specifies. Otherwise, the empty string if a status bar pane does not exist for the specified nIndex or if its tooltip text is empty.

CMFCStatusBar::InvalidatePaneContent

Invalidate the status bar pane and redraw its content.

void InvalidatePaneContent(int nIndex);

Parameters

nIndex
[in] Specifies the index of the pane whose content is to be invalidated and redrawn.

Remarks

When the status bar is invalidated, it is marked for redrawing. Windows redraws it when the UpdateWindow method sends a WM_PAINT message to the OnPaint method.

CMFCStatusBar::OnDrawPane

Redraw the pane of the status bar.

virtual void OnDrawPane(
    CDC* pDC,
    CMFCStatusBarPaneInfo* pPane);

Parameters

pDC
[in] A pointer to a device context for drawing.

pPane
[in] A pointer to a CMFCStatusBarPaneInfo structure that contains the information about the pane to be redrawn.

Remarks

By default, OnDrawPane redraws the pane by using the device context pDC according to the pane's style and content.

Override this method in a CMFCStatusBar-derived class to customize the appearance of a pane.

CMFCStatusBar::PreCreateWindow

virtual BOOL PreCreateWindow(CREATESTRUCT& cs);

Parameters

[in] cs

Return Value

Remarks

CMFCStatusBar::SetDrawExtendedArea

void SetDrawExtendedArea(BOOL bSet = TRUE);

Parameters

[in] bSet

Remarks

CMFCStatusBar::SetIndicators

BOOL SetIndicators(
    const UINT* lpIDArray,
    int nIDCount);

Parameters

[in] lpIDArray
[in] nIDCount

Return Value

Remarks

CMFCStatusBar::SetPaneAnimation

Assigns an animation to the specified pane.

void SetPaneAnimation(
    int nIndex,
    HIMAGELIST hImageList,
    UINT nFrameRate=500,
    BOOL bUpdate=TRUE);

Parameters

nIndex
[in] Specifies the index of the pane to which you want to assign to it an animation.

hImageList
[in] Specifies a handle to the image list that holds the animation frames.

nFrameRate
[in] Specifies the frame rate, in milliseconds, for the animation.

bUpdate
[in] If TRUE, update the pane content immediately. Otherwise, the pane content is updated when it is invalidated.

Remarks

If you want to disable the current animation, call SetPaneAnimation with hImageList set to NULL.

CMFCStatusBar::SetPaneBackgroundColor

Sets the background color of the status bar pane.

void SetPaneBackgroundColor(
    int nIndex,
    COLORREF clrBackground=(COLORREF)-1,
    BOOL bUpdate=TRUE);

Parameters

nIndex
[in] Specifies the index of the pane for which to set a new background color.

clrBackground
[in] Specifies the new background color.

bUpdate
[in] If TRUE, update the pane content immediately. Otherwise, do not update the pane content until the pane is invalidated by another method.

CMFCStatusBar::SetPaneIcon

Set the icon of the status bar pane.

void SetPaneIcon(
    int nIndex,
    HICON hIcon,
    BOOL bUpdate=TRUE);

void SetPaneIcon(
    int nIndex,
    HBITMAP hBmp,
    COLORREF clrTransparent=RGB(255, 0, 255),
    BOOL bUpdate=TRUE);

Parameters

nIndex
[in] Specifies the index of the pane for which to set the image.

hIcon
[in] Specifies a handle to the icon to be set as the pane image.

bUpdate
[in] Specifies whether to update the pane content immediately.

hBmp
[in] Specifies a handle to the bitmap to be set as the pane image.

clrTransparent
[in] Specifies the transparent color of the bitmap that the hBmp indicates.

Remarks

You can pass either HICON or HBITMAP together with the transparent color to set the pane's image. If you do not want to display the image any longer, pass the NULL value as the image handle.

If there is any running animation that CMFCStatusBar::SetPaneAnimation has set, the animation will be stopped.

CMFCStatusBar::SetPaneInfo

void SetPaneInfo(
    int nIndex,
    UINT nID,
    UINT nStyle,
    int cxWidth);

Parameters

[in] nIndex
[in] nID
[in] nStyle
[in] cxWidth

Remarks

CMFCStatusBar::SetPaneProgress

Set the current progress indicator of the progress bar for the specified pane.

void SetPaneProgress(
    int nIndex,
    long nCurr,
    BOOL bUpdate=TRUE);

Parameters

nIndex
[in] Specifies the index of the pane for which to update the progress indicator.

nCurr
[in] Specifies the current value of the progress indicator.

bUpdate
[in] Specifies whether the pane should be updated immediately.

Remarks

Call this method when you want to update the progress indicator for the progress bar in the specified pane.

To use this function for the given pane, you must call CMFCStatusBar::EnablePaneProgressBar first.

CMFCStatusBar::SetPaneStyle

void SetPaneStyle(
    int nIndex,
    UINT nStyle);

Parameters

[in] nIndex
[in] nStyle

Remarks

CMFCStatusBar::SetPaneText

virtual BOOL SetPaneText(
    int nIndex,
    LPCTSTR lpszNewText,
    BOOL bUpdate = TRUE);

Parameters

[in] nIndex
[in] lpszNewText
[in] bUpdate

Return Value

Remarks

CMFCStatusBar::SetPaneTextColor

Sets the text color of the specified pane.

void SetPaneTextColor(
    int nIndex,
    COLORREF clrText=(COLORREF)-1,
    BOOL bUpdate=TRUE);

Parameters

nIndex
[in] Specifies the index of the pane to which you want to assign a new text color.

clrText
[in] Specifies the text color.

bUpdate
[in] If TRUE, update the pane content immediately. Otherwise, do not update the pane content until the pane is invalidated by another method.

CMFCStatusBar::SetPaneWidth

Set the width of the status bar pane.

void SetPaneWidth(
    int nIndex,
    int cx);

Parameters

nIndex
[in] The index of the status bar pane for which to set a new width.

cx
[in] The new width of the status bar pane, in pixels.

CMFCStatusBar::SetTipText

Set the tooltip text of a status bar pane.

void SetTipText(
    int nIndex,
    LPCTSTR pszTipText);

Parameters

nIndex
[in] The index of the pane to which you want to assign the tooltip text.

pszTipText
[in] The new tooltip text.

Delen via

CMFCStatusBar Class

Syntax

Members

Public Methods

Protected Methods

Remarks

Examples

Inheritance Hierarchy

Requirements

CMFCStatusBar::CalcFixedLayout

Parameters

Return Value

Remarks

CMFCStatusBar::CommandToIndex

Parameters

Return Value

Remarks

CMFCStatusBar::Create

Parameters

Return Value

Remarks

CMFCStatusBar::CreateEx

Parameters

Return Value

Remarks

CMFCStatusBar::DoesAllowDynInsertBefore

Return Value

Remarks

CMFCStatusBar::EnablePaneDoubleClick

Parameters

Remarks

CMFCStatusBar::EnablePaneProgressBar

Parameters

Remarks

CMFCStatusBar::GetCount

Return Value

CMFCStatusBar::GetDrawExtendedArea

Return Value

Remarks

CMFCStatusBar::GetExtendedArea

Parameters

Return Value

Remarks

CMFCStatusBar::GetItemID

Parameters

Return Value

Remarks

CMFCStatusBar::GetItemRect

Parameters

Remarks

CMFCStatusBar::GetPaneInfo

Parameters

Remarks

CMFCStatusBar::GetPaneProgress

Parameters

Return Value

Remarks

CMFCStatusBar::GetPaneStyle

Parameters

Return Value

Remarks

CMFCStatusBar::GetPaneText

Parameters

Return Value

Remarks

CMFCStatusBar::GetPaneWidth

Parameters

Return Value

CMFCStatusBar::GetTipText

Parameters

Return Value

CMFCStatusBar::InvalidatePaneContent

Parameters

Remarks

CMFCStatusBar::OnDrawPane

Parameters

Remarks

CMFCStatusBar::PreCreateWindow

Parameters