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How do you know when you are supposed to draw the focus on a control?
I'm referring to controls on dialog boxes.
At first when you click on a control with the mouse, the control doesn't draw the focus rectangle. It only draws it once you start navigating the dialog with the keyboard.
I'd like to be able to find out from within the control using its hWnd.
(I'm trying to skin Win98-style buttons in VC++ 6.0 to give them a WinXP look by overriding drawing messages [WM_PAINT, BM_SETSEL, etc.] in the button's windows-class wnd proc. I've got everything done so far, except this, and I've spent hours searching MSDN and the internet trying to find it.)
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The DRAWITEMSTRUCT passed to OnDrawItem() contains this information. Specifically, the itemState member, whose ODS_FOCUS bit indicates the item has focus. You may also want to check the ODS_SELECTED bit to render the control appropriately. See this[^] MSDN article.
Alternatively, you could call GetFocus() to determine if the control has focus, although the preferred way is to check the DRAWITEMSTRUCT.
/ravi
My new year's resolution: 2048 x 1536
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ravib@ravib.com
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does anyone know of a function that i can pass 2 numbers to ie, 1 and 3, which would return a random float between the 2 parameters ie 2.3. perhaps a function that would return a random int would also work, i could just pass it 1000 and 3000 instead. any ideas? thanks.
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Off the top of my head...
int randInterval
(int nStart,
int nEnd)
{
int nInterval = abs (nEnd - nStart);
int nRand = rand() % nInterval;
return (nStart + nRand);
}
/ravi
My new year's resolution: 2048 x 1536
Home | Articles | Freeware | Music
ravib@ravib.com
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//linear transformation
#define GetRandom(min,max) rand()*((float)((max)-(min)))/(float)(RAND_MAX)+(min)
//this only works when min and max are small
/* GetRandom returns a random integer between min and max. */
#define GetRandom( min, max ) ((rand() % (int)(((max) + 1) - (min))) + (min))
http://blog.joycode.com/jiangsheng
http://blog.csdn.net/jiangsheng
Command what is yours
Conquer what is not
---Kane
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I'm trying to make an icon editor, but i don't know which colors to use for the palettes. Do you use the standard windows system palette? Is there any way to find out what the color values are for it? For example:
COLORREF stdpal16[] = {/*color values*/};
COLORREF stdpal256[] = {/*color values*/};
thanks.
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i need to be able to read a line from a text file and store what is read in int.
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Try this,
CFileException ex;
CFile myfile;<br />
<br />
myfile.Open("c:/b.txt", CFile::modeRead, &ex);<br />
<br />
int z=myfile.GetLength();<br />
char* data=new char[z];<br />
myfile.Read(data,z);<br />
<br />
int* value=new int[z/3];<br />
for(int i=0;i<z;i=i+3)<br />
value[i/3]=atol(&data[i]);
<br />
myfile.Close();
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what header file to i need for this code?
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No header is required. Stdafx.h is sufficient i think. CFile is a class of MFC. Refer to MSDN
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what do you man when you say that you want to store the data in int.
do you want to store the number of bytes you read from a file in int'or do you want to store the data in int(in that case -> ???????)?
regards,
Eli
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i want to store the data in int.
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Assuming that your file has CR/LF at end of each line.
The code below might be easier
<br />
CStdioFile myFile("Sample.txt",CFile::modeRead );<br />
CString myBuffer;<br />
int myInteger = 0;<br />
LPCTSTR pMyBuffer,<br />
pMyBufferEnd;<br />
<br />
myFile.ReadString(myBuffer);<br />
<br />
while(!myBuffer.IsEmpty()){<br />
pMyBuffer = myBuffer;<br />
pMyBufferEnd = pMyBuffer + myBuffer.GetLength();<br />
cout << pMyBuffer << endl;<br />
<br />
for( pMyBuffer;pMyBuffer <= pMyBufferEnd; pMyBuffer++)<br />
{<br />
<br />
if((*pMyBuffer < '0') ||(*pMyBuffer > '9'))<br />
{<br />
cout << myInteger << (LPCTSTR) " ";<br />
myInteger = 0;<br />
}<br />
<br />
else<br />
{<br />
myInteger *= 10;<br />
myInteger += *pMyBuffer - 48;<br />
}<br />
<br />
}<br />
<br />
cout << endl;<br />
<br />
myFile.ReadString(myBuffer);<br />
}<br />
<br />
myFile.Close();<br />
I'll e-mail you a demo. It's a console app (don't worry it supports MFC!)
Good luck, happy programming,
Alton
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Hello,
This is regarding the listview app.
I am able to compile this in debug mode but it does not work when i try to run the executable. Does anyone know why this is?
void CReportCtrlDemoView::OnInitialUpdate()
{
CFormView::OnInitialUpdate();
GetParentFrame()->RecalcLayout();
ResizeParentToFit();
srand((unsigned)time(NULL));
CRASHES HERE: m_wndList.Create(this, 0, NULL, 0);
Please help with this.
thanks,
Lino
this is the link to the code:
http://www.codeproject.com/listctrl/ReportControl.asp?df=100&forumid=29500&select=1048274"
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Hmmm, are you using DDX to create the m_wndList control? If so it already exists by the time you hit the code that causes the crash and the crash is in fact an ASSERT telling you that the list control already exists. This would explain why it works in release (implied in the title) but not in debug.
Rob Manderson
I'm working on a version for Visual Lisp++
My blog http://blogs.wdevs.com/ultramaroon/[^]
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how do i fix it?
if you are referring to:
DDX_Control(pDX, IDC_LIST1, m_wndList);
inside the DoDataExchange() it does not exist.
Let me caution u that i am not an expert in this so if you have the patience be as explicit as possible.
thanks,
Lino
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Hi
The exact issue is in PreSubclassWindow() method of ReportCtrl class.
ASSERT(GetHeaderCtrl() != NULL);
ASSERT macro will work only in debug version and not in Release.
so it wont throw exception in release mode.
comment the above code in your class and try.
thks
Jibesh.V.P
Jibesh.V.P
www.m2India.com
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that was it thank you...
greatly appreciate your help.
Lino
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Hi, I've been creating, a semi-portable thread class.
all of it works fine, but i'm having trouble,
understanding how to pass the address of my structure,
through the void* of beginthreadex, and if then how to,
access the structure again from there.
here's a little code to help better explain my problem:
typedef struct {
char* szReference;
__w64 unsigned uHwnd;
unsigned uReferenceLength,
uIdentity,
uState;
} Thread_barrer;
void CCThread::SetFunction(unsigned(__stdcall *uFunction)(void*))
{
this->vfThreadProc = uFunction;
}
void CCThread::InitThread(Thread_barrer &tbObj)
{
tbObj.uHwnd = _beginthreadex(
0,0,vfThreadProc,(void*)&tbObj,
0,&tbObj.uIdentity);
}
but to pass the address of the context (&tbObj <above>) through void*
and access it inside:
unsigned __stdcall ThreadCentre(void *vArguments)
{
Thread_barrer tbObj;
printf("predicted address of tbObj: %d\n",vArguments);
return (1);
}
i'd assume that you could set another context to that address,
but it's not easy to find viable info , on such unique tasks.
note: this all compiles fine, I'm having trouble with using the address,
passed through __beginthreadex to access the context there of.
any tips, or ideals will help.
thank you.
A world without knowledge, is a world without life.
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When you call _beginthreadex() you cast a Thread_barrier* to void*, so in the thread function you just cast it back:
unsigned __stdcall ThreadCentre(void *vArguments)
{
Thread_barrer* ptbObj = (Thread_barrer*) vArguments;
...
}
--Mike--
LINKS~! Ericahist updated! | 1ClickPicGrabber | CP SearchBar v2.0.2 | C++ Forum FAQ
Strange things are afoot at the U+004B U+20DD
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Thanks Mike, i had been trying stuff, close to that, but thanks.
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Ok, i have a problem with classes. I have searched the forums, but all classes on here are so much more complex. (I know i'm a beginner, but we all have to start somewhere  ) I have tried, but can't figure it out. I want this program to do two functions, as seen, and then show the sum of these two functions. I have to learn classes for a more difficlut uni assignment, so help would be great!
cheers!!!
#include <iostream.h>
class rectangle
{
public:
rectangle();
double sumA();
double sumB();
private:
double a,b,c,d,e,f,g;
};
int main ()
{
double a=0,b=0,c=0,d=0,e=0,f=0,sumA,sumB;
cout << "enter a\n";
cin >> a;
cout << "enter b\n";
cin >> b;
cout << "enter d\n";
cin >> d;
cout << "enter e\n";
cin >> e;
cout << "the size is: " << sumA()+sumB() << endl;
return 0;
}
rectangle::rectangle()
{
}
double rectangle :: sumA()
{
return c=a+b;
}
double rectangle :: sumB()
{
return f=d+e;
}
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may want to declare an instance of the class in main()
rectangle rectMyClass;
rectMyClass.sumA();
rectMyClass.sumB();
and another tip, that may help you keep track of what is what,
is to make your variable names a bit more descriptive.
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