Similar to the "CPU usage" Control in the Task Manager

This class is generated from cstatic.

Add a static text box in the dialog box editor before you directly use classwizard to add a member variable member clevelbar in the dialog box, or use create to generate a static text box dynamically.

This control also provides a threshold. When the threshold is exceeded, the parameter is displayed in another color.

The Code is as follows:

Class Definition

//////////////////////////////////////// /////////////////////////////////////
// Clevelbar. h parameter monitoring window
// Coder: daijun scut-ee-425
// Version: 1.0.0
// Created: 2007-07-12
//////////////////////////////////////// /////////////////////////////////////

Class clevelbar: Public cstatic
{
// Construction
Public:
Clevelbar ();

// Attributes
Public:
 
Colorref m_bkcolor; // background color
Colorref m_barcolor; // foreground color
Colorref m_barbkcolor; // Security remaining area color
Colorref m_txcolor; // text color
Colorref m_warncolor; // hazardous area foreground
Colorref m_warnbkcolor; // hazardous residual area color
 
Int npercent; // percentage of the current parameter (0 ~ 100)
 
Protected:
Int m_nslice; // Number of cut parts
Char szvalue [32]; // annotation text
Int nwarn; // dangerous line percentage (20 ~ 100)
Crect m_dwrect; // rect of the drawing Area
// Operations
Public:
Void setpercent (int p );
Void settext (char * sztext );
Void setSlice (int n );
Void setwarnlevel (INT eV );
Void setcolorbk (colorref color );
Void setcolors (colorref fore, colorref barbk, colorref warn, colorref warnbk );
Protected:
Void drawbackground ();
Void drawbar ();
Void drawtext ();

// Overrides
// Classwizard generated virtual function overrides
// {Afx_virtual (clevelbar)
//} Afx_virtual

// Implementation
Public:
Virtual ~ Clevelbar ();

// Generated message map Functions
Protected:
// {Afx_msg (clevelbar)
Afx_msg void onpaint ();
// Note-The classwizard will add and remove member functions here.
//} Afx_msg

Declare_message_map ()
};

 

//////////////////////////////////////// //////////////////////////////////////// //////////

//////////////////////////////////////// //////////////////////////////////////// /////////////////////////////////

Implementation file:

Clevelbar: clevelbar (): m_nslice (20)
{
M_bkcolor = RGB (0, 0, 0 );
M_barcolor = RGB (30,250, 30 );
M_barbkcolor = RGB (0, 50, 0 );
M_txcolor = m_barcolor;
M_warnbkcolor = RGB (50, 0, 0 );
M_warncolor = RGB (255, 20, 20 );
Npercent = 0;
Nwarn= 100;
M_txcolor = (npercent> nwarn )? M_warncolor: m_barcolor;
 
Strcpy (szvalue ,"");
}

Clevelbar ::~ Clevelbar ()
{
 
}

Begin_message_map (clevelbar, cstatic)
// {Afx_msg_map (clevelbar)
On_wm_paint ()
//} Afx_msg_map
End_message_map ()

//////////////////////////////////////// /////////////////////////////////////
// Clevelbar message handlers

Void clevelbar: onpaint ()
{
Cpaintdc DC (this); // device context for painting
Getclientrect (& m_dwrect );
 
// Draw the background
Drawbackground ();
Drawbar ();
Drawtext ();

DC. SelectObject (poldpen );
}

Void clevelbar: drawbackground ()
{
Cclientdc DC (this );
Cbrush BR;
BR. createsolidbrush (m_bkcolor );
DC. fillrect (& m_dwrect, & Br );
BR. deleteobject ();
}

// Draw a cursor
Void clevelbar: drawbar ()
{
Cclientdc DC (this );
Int barwidth, barlen;
Crect rectbar;
Crect CTS;
Rectbar. Left = m_dwrect.left + 15; // bar area size
Rectbar. Right = m_dwrect.right-15;
Rectbar. Top = m_dwrect.top + 5;
Rectbar. Bottom = m_dwrect.bottom-25;
Barwidth = rectbar. Height ()/m_nslice-1;
Barlen = rectbar. Width ()/2-2;

// Specify a foreground entry
Cbrush BR;
BR. createsolidbrush (m_barcolor );
Int I;
Int foreslice = npercent * m_nslice/100;
Int warnslice = nwarn * m_nslice/100;
If (npercent> nwarn) & (foreslice = warnslice ))
{
-- Warnslice;
}
For (I = 0; I <foreslice; I ++)
{
RDBMS. setrect (rectbar. Left + 1, rectbar. Bottom-barwidth-(barwidth + 1) * I,
Rectbar. Left + barlen, rectbar. Bottom-(barwidth + 1) * I );
DC. fillrect (& RDBMS, & Br );
RDBMS. setrect (rectbar. Left + barlen + 2, rectbar. Bottom-barwidth-(barwidth + 1) * I,
Rectbar. Right-1, rectbar. Bottom-(barwidth + 1) * I );
DC. fillrect (& RDBMS, & Br );
If (I + 1) = warnslice)
{
++ I;
Break; // exit the loop
}
}
If (foreslice> I) // area of the alarm
{
BR. deleteobject ();
BR. createsolidbrush (m_warncolor );
For (; I <foreslice; I ++)
{
RDBMS. setrect (rectbar. Left + 2, rectbar. Bottom-barwidth-(barwidth + 1) * I,
Rectbar. Left + barlen, rectbar. Bottom-(barwidth + 1) * I );
DC. fillrect (& RDBMS, & Br );
RDBMS. setrect (rectbar. Left + barlen + 2, rectbar. Bottom-barwidth-(barwidth + 1) * I,
Rectbar. Right-1, rectbar. Bottom-(barwidth + 1) * I );
DC. fillrect (& RDBMS, & Br );
}
}

BR. deleteobject ();
BR. createsolidbrush (m_barbkcolor );
// Background
For (; I <m_nslice & I <warnslice; I ++)
{
RDBMS. setrect (rectbar. Left + 1, rectbar. Bottom-barwidth-(barwidth + 1) * I,
Rectbar. Left + barlen, rectbar. Bottom-(barwidth + 1) * I );
DC. fillrect (& RDBMS, & Br );
RDBMS. setrect (rectbar. Left + barlen + 2, rectbar. Bottom-barwidth-(barwidth + 1) * I,
Rectbar. Right-1, rectbar. Bottom-(barwidth + 1) * I );
DC. fillrect (& RDBMS, & Br );
}
BR. deleteobject ();
BR. createsolidbrush (m_warnbkcolor );
// Alarm background
For (; I <m_nslice; I ++)
{
RDBMS. setrect (rectbar. Left + 2, rectbar. Bottom-barwidth-(barwidth + 1) * I,
Rectbar. Left + barlen, rectbar. Bottom-(barwidth + 1) * I );
DC. fillrect (& RDBMS, & Br );
RDBMS. setrect (rectbar. Left + barlen + 2, rectbar. Bottom-barwidth-(barwidth + 1) * I,
Rectbar. Right-1, rectbar. Bottom-(barwidth + 1) * I );
DC. fillrect (& RDBMS, & Br );
}

BR. deleteobject ();

}

Void clevelbar: drawtext ()
{
Cclientdc DC (this );
Crect CTS;
RDBMS. Top = m_dwrect.bottom-20;
RDBMS. Left = m_dwrect.left;
RDBMS. Right = m_dwrect.right;
RDBMS. Bottom = m_dwrect.bottom-5;

DC. setbkcolor (m_bkcolor );
DC. settextcolor (m_txcolor );
 
DC. drawtext (cstring (szvalue), & RDBMS, dt_center );

}

Void clevelbar: settext (char * sztext)
{
Strcpy (szvalue, sztext );
}

Void clevelbar: setSlice (int n)
{
M_nslice = (n> 50 )? 50: N;
}

Void clevelbar: setpercent (int p)
{
Npercent = (P> 100 | P <0 )? 0: P;
M_txcolor = (npercent> nwarn )? M_warncolor: m_barcolor;
}

Void clevelbar: setwarnlevel (INT eV)
{
Nwarn = (lev> 100 | lev_number <20 )? 100: lev.aliyun.com;
}

Void clevelbar: setcolorbk (colorref color)
{
M_bkcolor = color;
}

Void clevelbar: setcolors (colorref fore, colorref barbk, colorref warn, colorref warnbk)
{
M_barcolor = fore;
M_barbkcolor = barbk;
M_warncolor = warn;
M_warnbkcolor = warnbk;
M_txcolor = (npercent> nwarn )? M_warncolor: m_barcolor;
}