A New Progress Bar for All Occassions

CodeGuru content and product recommendations are editorially independent. We may make money when you click on links to our partners. Learn More.

Environment: VC6, VC7, MFC

Description

This article describes a CStatic-derived Progress bar that allows “busy” times with no defined end to be indicated with more than just an hourglass cursor.

Adding the Code to Your project

The CKCBusyProgress control can be subclassed within a dialog by following these steps:

1. Insert the .h and .cpp files into your project.
2. Add a static control to your dialog resource.
3. Add a member variable for the static control (eg m_ctlBProgress).
4. Change the variable declaration from:

CStatic m_ctlBProgress;

to:

CKCBusyProgress m_ctlBProgress;

5. et voilá! You have the control embedded!

Public Functions

void SetNumSteps(int nNumSteps)

Sets the number of visible blocks in the control

int GetNumSteps()

Gets the number of visible blocks in the control

void SetCurPos(int nCurPos)

Sets the current position of the marker

int GetCurPos()

Gets the current position of the marker

void SetInterBlockPadding(int nPadding)

Sets the number of pixels between each block

int GetInterBlockPadding()

Gets the number of pixels between each block

void SetSpeed(int nSpeed)

Sets the speed (in milliseconds) of visual updates when the control is in BPC_MODE_BUSY mode

int GetSpeed()

Gets the speed (in milliseconds) of visual updates when the control isin BPC_MODE_BUSY mode

bool IsRunning()

Indicates whether the control is currently indicating a busy state (the control must be in BPC_MODE_BUSY mode)

void SetMode(int nMode = BPC_MODE_BUSY)

Sets the mode of the control
Valid parameters are:

int GetMode()

Gets the current mode of the control

void SetRange(int nLower, int nUpper)

Sets the lower and upper bounds of the control for when it is in BPC_MODE_PROGRESS mode

void GetRange(int& nLower, int& nUpper)

Gets the lower and upper bounds of the control

void Recalc()

Request the control to recalculate its internal visual aspects and ratios

void Reset()

Call this to reset the control to the state it was when it was first created

void Start()

Request the control to start its “busy” mode. This will only work if the control’s mode is BPC_MODE_BUSY

void End()

Request the control to end its “busy” mode. This will only work if the control’s mode is BPC_MODE_BUSY and the Start() function was called prior to this

void StepIt()

Call this function to manually “step” the control marker. This function works in both modes. When called in BPC_MODE_BUSY mode, the function will automatically cause the marker to change direction once it has reached either left or right control edge

COLORREF GetColBkg()

Gets the colour of the background

void SetColBkg(COLORREF col)

Sets the colour of the background

COLORREF GetColBlockFace()

Gets the fill colour of the face of normal blocks

void SetColBlockFace(COLORREF col)

Sets the fill colour of the face of normal blocks

COLORREF GetColBlockEdge()

Gets the pen colour of the border of each normal block

void SetColBlockEdge(COLORREF col)

Sets the pen colour of the border of each normal block

COLORREF GetColBlockFaceHi()

Gets the fill colour of the face of highlighted blocks

void SetColBlockFaceHi(COLORREF col)

Sets the fill colour of the face of highlighted blocks

COLORREF GetColBlockEdgeHi()

Gets the pen colour of the border of each highlighted block

void SetColBlockEdgeHi(COLORREF col)

Sets the pen colour of the border of each highlighted block

Overridable Functions

virtual void DrawBackground(CDC& dc, CRect& rect)

Override this function if you want different background drawing logic. The CRect rect parameter contains the dimensions of the control’s client area

virtual void DrawBlock(CDC& dc, CRect& rect)

Override this function if you want to change the drawing logic of a standard block in the control.
The CRect rect parameter contains the dimensions of the block being drawn

virtual void DrawHiliteBlock(CDC& dc, CRect& rect)

Override this function if you want to change the drawing logic of a highlighted block in the control.
The CRect rect parameter contains the dimensions of the block being drawn

virtual void DrawPartialBlock(CDC& dc, CRect& rect)

Override this function if you want to change the drawing logic of a partially highlighted block in the control.
The CRect rect parameter contains the dimensions of the block being drawn

… and the Control Responds to Messages …

The following messages are defined for interaction with the control via the SendMessage() or PostMessage() functions:

Message

WPARAM

LPARAM

Corresponding function

Known Issues/To-Do List

• Must implement an orientation flag to indicate horizontal or vertical display
• Contemplating adding a tooltip to indicate “percentage” complete when the control is in BPC_MODE_PROGRESS mode
• Increase the message list (BPM_XXXXX) to enable setting ALL parameters (such as colours)

Conclusion

If you want an alternative to the stock standard Windows CProgressCtrl control, give this one a spin. Let me know if you like it.

Downloads

Download demo project – 51 Kb

Download source – 5 Kb