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Not too many images to add, about 20, I'm not sure if a thread is necesaay. Here is the piece of code, the performace is not good enough.
My CPU is P4 1.8G.
LPCITEMIDLIST pidl=SHBrowseForFolder(&bi);
if(::SHGetPathFromIDList(pidl,FindPath)) {
_tcscat(FindPath,TEXT("\\*.jpg"));
CFileFind ff;
BOOL b=ff.FindFile(FindPath);
while (b) {
b=ff.FindNextFile();
CString FilePath=ff.GetFilePath();
WCHAR *w=FilePath.AllocSysString();
Bitmap bm(w);
::SysFreeString(w);
HBITMAP hBmp;
bm.GetHBITMAP(Color::Black,&hBmp);
Bitmap *pThumb=(Bitmap*)bm.GetThumbnailImage(60,45);
pThumb->GetHBITMAP(Color::Black,&hBmp);
CBitmap *pBmp=new CBitmap;
pBmp->Attach(hBmp);
int i=m_wndToolDlgBar.m_ImgList.Add(pBmp,RGB(0,0,0));
m_wndToolDlgBar.m_piclist.InsertItem(0,ff.GetFileTitle(),i);
delete pThumb;
delete pBmp;
}
}
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Well whats the problem? does speed low?
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Yes, it freezes until all images are added.
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You can use of timer for this work.
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followait wrote: WCHAR *w=FilePath.AllocSysString(); Bitmap bm(w); ::SysFreeString(w); HBITMAP hBmp; bm.GetHBITMAP(Color::Black,&hBmp); Bitmap *pThumb=(Bitmap*)bm.GetThumbnailImage(60,45); pThumb->GetHBITMAP(Color::Black,&hBmp);
You can skip the above code if use the LoadImage() function instead of the GDI+ functions/classes
CString FilePath=ff.GetFilePath();<br />
HBITMAP hBitmap= (HBITMAP)LoadImage(....)<br />
CBitMap objBitmap( hBitmap );
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If you dont need to jpg files and... and need to bmp you can use of LoadImage.
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I am not sure, as i read you code, you seems first searching file and then updating the listctrl for every files, why don't you put all searched file in some datastructure and update teh list ctrl in single go instead of updating it for evry file and why there different handle for same image, you can use same handle for every image.
"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
Never mind - my own stupidity is the source of every "problem" - Mixture
cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
Support CRY- Child Relief and You/codeProject$$>
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Every image is considered different from each other. So no different handles for the same image.
I consider the "Go ahead way" as a optimization.
Maybe it will be done later, maybe not.
Thanks for you advice.
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It seems you are doing two things in the while() loop. Why not separate the "add images to list" and "add items to control" into two while() loop? If that is not feasible, then you might want to consider a secondary thread for this so that the UI remains responsive.
Another thing to try would be to call SetRedraw(FALSE) before the "add items to the list" code.
"Normal is getting dressed in clothes that you buy for work and driving through traffic in a car that you are still paying for, in order to get to the job you need to pay for the clothes and the car and the house you leave vacant all day so you can afford to live in it." - Ellen Goodman
"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne
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Because by seprating, the mapping of file and image is a little hard to find when I forgot the code.
SetRedraw(FALSE) might be a good try.
Thanks for you suggestion.
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this is part of my code.
and i am making some drawing line.
first, i put my left_mousebutton then point is displayed,
but the line don't draw~
it is good if i delete "WM_LBUTTONUP".
can you tell me why this happen?
HDC hdc;
PAINTSTRUCT ps;
static TCHAR str[200] ;
int len;
static int x = 100;
static int y = 100;
static bool b_start = false;
case WM_LBUTTONDOWN:
x = LOWORD(lParam);
y = HIWORD(lParam);
b_start = true;
return 0;
case WM_MOUSEMOVE:
if(b_start == true)
{
hdc = GetDC(hWnd);
MoveToEx(hdc, x, y, NULL);
x = LOWORD(lParam);
y = HIWORD(lParam);
LineTo(hdc, x, y);
ReleaseDC(hWnd, hdc);
}//b_start == true
case WM_LBUTTONUP:
b_start = false;
return 0;
}//iMessage
return (DefWindowProc(hWnd, iMessage, wParam, lParam));
}//LRESULT
Thank you everyone~
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Perhaps you forgot to put a 'return 0':
case WM_MOUSEMOVE:
if(b_start == true)
{
hdc = GetDC(hWnd);
MoveToEx(hdc, x, y, NULL);
x = LOWORD(lParam);
y = HIWORD(lParam);
LineTo(hdc, x, y);
ReleaseDC(hWnd, hdc);
}//b_start == true
// <----------------------------------- H E R E
case WM_LBUTTONUP:
b_start = false;
return 0;
Only fools rush in. Foo!
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it is working when i put return 0, ~
thank you~~
Thank you everyone~
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Hello. I've been tasked with getting data off of a web page. Thanks to CodeProject I've made great strides, but I now seem to have hit an impasse. When I get to my URL I get the body of the document with the following code:
hr = pHTMLDocument2->get_body( &pElem );
if ( hr == S_OK && pElem != NULL )
{
pElem->get_innerText(&bstr);
CString strInnerText = bstr;
ScrapeFuturesSettlementData( strInnerText );
}
strInnerText has all of the data I need, but I can't break it down into specific rows and, what's worse (I've got a workaround for that issue) some of the data has no delimiter between entries, so I don't know where one entry begins and the other ends. Has anybody encountered anything similar? Thanks.
Tom Paronis
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Did you see my link on your previous question?(I think it was before December  )
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Yes I did and it's what's gotten me as far as I am now. Thanks again! Now I'm trying to wrestle with a great mass of HTML data. Part of the problem is that I'm a HTML neophyte, but I think I'm getting pretty close to what I want. What I'm doing is sort of cumbersome C++ parsing and I was wondering if there was some easy way to just pluck the rows I want instead of iterating through the whole document. If there is I haven't found it yet, despite lots of searching.
Tom paronis
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hi,
i would like to use exception handling as a non local goto mechanism so i can implement tail calls, but its very slow (msvc 7.1, release build).
can anybody tell me why, whether this is a blind alley, and how to speed things up if it isn't?
cheers
jono
day-one.com
code follows:
====================================================================================
#include <iostream>
enum{SZ=1000};
int integers[SZ];
using std::ostream;
using std::cout;
struct Continuation
{
Continuation(int cont)
:cont_(cont)
{}
int cont_;
};
ostream &tail_call_helper(ostream &os, int &i)
{
os << integers[i++] << ' ';
if(i < SZ)
{
throw Continuation(i);
}
else
{
// do nothing
}
return os;
}
ostream &tail_call_(ostream &os)
{
int i = 0;
while(true)
{
try
{
tail_call_helper(os, i);
}
catch(Continuation c)
{
i = c.cont_;
continue;
}
break;
}
return os;
}
int main(int argc, char* argv[])
{
tail_call_(cout);
return 0;
}
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Hi,
the first exception when running under Visual Studio is extremely slow.
All others are just slow, because they need to create an exception object (which includes
a stack traceback), then scan the stack for a matching catch.
After all, exceptions are intended to take care of the exceptional case;
for normal cases yes they are a blind alley.
Luc Pattyn [Forum Guidelines] [My Articles]
this months tips:
- before you ask a question here, search CodeProject, then Google
- the quality and detail of your question reflects on the effectiveness of the help you are likely to get
- use PRE tags to preserve formatting when showing multi-line code snippets
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thanks for that Luc.
so, any suggestions then? i seem to recall doing something similar to this with setjmp and longjmp a few years ago, but i'd be loath to try it with my boost heavy code.
i'd be interested in any good resources on tail calls in C++. i've found one or two online, but after the first paragraph the discussion degenerates into 'real' languages like lisp & scheme, lol.
cheers
jono
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pretty simple question, I got the following error message when linking. any one can help on it?
Linking...
mfcs42d.lib(dllmodul.obj) : error LNK2005: _DllMain@12 already defined in Reset.obj
mfcs42d.lib(dllmodul.obj) : warning LNK4006: _DllMain@12 already defined in Reset.obj; second definition ignored
Creating library Debug/Reset.lib and object Debug/Reset.exp
Debug/Reset.dll : fatal error LNK1169: one or more multiply defined symbols found
Error executing link.exe.
this is a MFC DLL. If I want to change the link order, the error message only gives me "mfcs42d.lib" and "Reset.obj", doesn't give me the 2nd lib file from "Reset.obj". what shoudl I do? thanks a lot!
modified on Wednesday, December 05, 2007 6:21:19 PM
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I just tried to comment the DllMain() in my cpp file. it passes the link, but I'm not sure it's correct or not. any one can help on it? thanks a lot!
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