C / C++ / MFC

John Simmons / outlaw programmer wrote:

1) Is there a way to programatically check/uncheck the checbox in this control?

John Simmons / outlaw programmer wrote:

2) Is there a way to tell when the checkbox has been clicked on?

Alberto_Canabal wrote:

am i doing something wrong?

• GDI+ is a good deal slower than old GDI calls for some operations. When faced with a serious performance problem, profile *everything* and look for the root cause.
• Some GDI+ features, such as antialiasing, gradiant fills, etc. are bound to make some operations slightly slower - so if your code requires a billion lines to be drawn every second, then the extra cost of making them look nice will really cost ya!
• Blitting between a memory DC and the screen in GDI+ can be considerably slower than doing so using GDI routines, especially if the two use different color depths.

<br />
  //Get the invalid rectangle...<br />
  CRect rect;<br />
  GetUpdateRect(&rect);<br />
<br />
  CPaintDC dc(this);<br />
  Graphics graphics(dc.m_hDC);<br />
<br />
  //Clear the background...<br />
  graphics.Clear(Color::Black);<br />
<br />
  Color colorCross = Color::Red;<br />
  HatchBrush oBrushCross(HatchStyleCross, colorCross, <br />
           Color(0,0,0,0));<br />
<br />
  Pen oPenCross(colorCross, 0.0);<br />
	<br />
  RectF oRect(<br />
        rect.TopLeft().x + 50, <br />
	rect.TopLeft().y + 50, <br />
	rect.Width() - 50, <br />
	rect.Height() - 50);<br />
<br />
  //Paint the area with a grid...<br />
  graphics.FillRectangle(&oBrushCross, oRect);<br />
  graphics.DrawRectangle(&oPenCross, oRect);<br />
<br />
  Color color    = Color::Yellow;<br />
  HatchBrush oBrush(HatchStyleBackwardDiagonal, color, <br />
        Color(0,0,0,0));<br />
  Pen oPen(color, 0.0);<br />
<br />
  //Draw a static rectangle<br />
  RectF ooRect(100, 100, 200, 200);<br />
  graphics.FillRectangle(&oBrush, ooRect);<br />
  graphics.DrawRectangle(&oPen, ooRect);<br />

// ... regular GDI calls
{
   using namespace Gdiplus;
   Graphics gfx(dc.m_hdc);
   gfx.Clear(Color::Black);
   // ...
}
// ... gfx goes out of scope, continue w/ regular GDI calls

class CChildDlg : public CDialog<br />
{<br />
public:<br />
   void SetData(int Value)  { m_Value = Value; }<br />
<br />
private:<br />
   int m_Value;<br />
}

voidCChildDlg::OnInitDialog()<br />
{<br />
   // Use the data in m_Value to display it somwhere...<br />
   ....<br />
}

<br />
<br />
//- -----------------------------------------------------------------<br />
//- SetThreadName.H Header File<br />
//- -----------------------------------------------------------------<br />
<br />
#pragma once<br />
<br />
extern "C"<br />
void WINAPI SetCurrentThreadName(<br />
    LPCTSTR szThreadName<br />
    );<br />
<br />
extern "C"<br />
void WINAPI SetThreadName(<br />
    DWORD   dwThreadID, <br />
    LPCTSTR szThreadName<br />
    );<br />
<br />
//- -----------------------------------------------------------------<br />
//- END SetThreadName.H Header File<br />
//- -----------------------------------------------------------------<br />
<br />
//- -----------------------------------------------------------------<br />
//- SetThreadName.Cpp Source File<br />
//- -----------------------------------------------------------------<br />
<br />
#include "stdafx.h"<br />
#include "SetThreadName.H"<br />
<br />
#define MS_VC_STN_EXCEPTION 0x406d1388<br />
<br />
#pragma pack( push, PPSetThreadName)<br />
#pragma pack( 4 )<br />
<br />
typedef struct _SETTHREADNAMEINFO<br />
{<br />
    DWORD   dwType;     // must be 0x1000<br />
    LPCSTR  szName;     // pointer to name in same address space<br />
                        // thread name should be limited to 9 characters<br />
    DWORD   dwThreadId; // thread Id, -1 = caller thread<br />
    DWORD   dwFlags;    // reserved for future use, must be zero<br />
<br />
} SETTHREADNAMEINFO;<br />
<br />
#pragma pack( pop, PPSetThreadName )<br />
<br />
extern "C"<br />
void WINAPI SetCurrentThreadName(<br />
    LPCTSTR szThreadName<br />
){<br />
    DWORD dwThreadId = GetCurrentThreadId();<br />
    SetThreadName(dwThreadId, szThreadName);<br />
}<br />
<br />
extern "C"<br />
void WINAPI SetThreadName(<br />
    DWORD   dwThreadId, <br />
    LPCTSTR szThreadName<br />
){<br />
    // only change names if debugger is loaded<br />
    if( IsDebuggerPresent() ){<br />
<br />
        // thread name should be limited to 9 characters<br />
        SETTHREADNAMEINFO STNInfo;<br />
        TCHAR             szTempName[10];<br />
        <br />
        ZeroMemory(&STNInfo, sizeof(SETTHREADNAMEINFO));<br />
        <br />
        // force name to length of 9 characters<br />
        ZeroMemory(szTempName, sizeof(szTempName));<br />
        lstrcpyn(szTempName, szThreadName, 9);<br />
<br />
        STNInfo.dwType     = 0x1000;<br />
        STNInfo.szName     = szTempName;<br />
        STNInfo.dwThreadId = dwThreadId;<br />
        STNInfo.dwFlags    = 0;<br />
<br />
        TCHAR szMessage[512];<br />
        wsprintf(szMessage, "Setting thread 0x%08lx name to '%s'", dwThreadId, szTempName);<br />
        OutputDebugString(szMessage);<br />
<br />
        __try<br />
        {<br />
            RaiseException( MS_VC_STN_EXCEPTION, <br />
                            0, <br />
                            sizeof(STNInfo) / sizeof(DWORD),<br />
                            (DWORD *)&STNInfo);<br />
        }<br />
        __except (EXCEPTION_CONTINUE_EXECUTION)<br />
        {<br />
        }<br />
<br />
    }<br />
}<br />
<br />
//- -----------------------------------------------------------------<br />
//- END SetThreadName.Cpp Source File<br />
//- -----------------------------------------------------------------<br />
<br />