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Hello,
I have a dialog based mfc program under VBC++6.0, and I am trying to create a new dialog that pops up and displays the status of my program. In other words, I have my main dialog with a button on it, and when you push that button a loop begins. The loop makes a simple calculation and then pauses for 300ms before looping back to the beginning.
My question is: how do I make a new dialog appear on top of my main dialog so that after each calculation a string is sent to a message box telling which calculation I am on, i.e. the text box says “Working on calculation 1” and then “Working on calculation 2” and so forth.
I know how to make a new dialog appear using the CNewDialog dlg; and dlg.DoModal(); commands, and I also know how to write a single string to the text box using dlg.m_CalcNumber = "Working on calculation 1"; command. I have no idea how to overwrite this string over and over again. Please help!!!!!!!! Much thanks in advance!
~Loren
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You need a modeless dialog, not a modal one.
Instead of calling DoModal, you need to call Create then ShowWindow.
Use the handle of the dialog and send a message whenever you need to update the text.
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1. You need to make your 2nd dialog modeless, call Create instead of DoModal.
2. You can then perform your calculations and update the modeless dialog after each calculation.
3. You call DestroyWindow to remove the modeless dialog when complete.
You need a message pump to make your modeless dialog redraw. The could be after each calculation or embedded within to get more frequent updates.
You could add a cancel button to your modeless dialog and store a value in a bool when it is clicked. You then check the bool in the calculation to see if you want to quit.
Hope this fragment helps:
C2ndDialog dlg;
dlg.Create(IDD_2ND, this);
dlg.ShowWindow(SW_SHOW);
AfxGetMainWnd()->EnableWindow(FALSE);
{
//do calculation
//update value in dlg
MSG msg;
while ( ::PeekMessage( &msg, NULL, NULL, NULL, PM_NOREMOVE ) )
{
//message pump to redraw dlg
AfxGetApp()->PumpMessage();
}
}
while (calculating);
AfxGetMainWnd()->EnableWindow(TRUE);
workDlg.DestroyWindow();
j a m s p o o n
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Hey Gang,
I am working on creating a custom GUI using C++ (primarily for game programming). For the most part, the GUI will mimic the structure and functionality of the Java Swing GUI 1.1.
The Swing GUI has a 'Component' class with a child 'Container' class that inherits from Component. (A Container is basically a Component that can contain multiple Components.)
The problem I am having using C++ is that the Component Class needs a function 'DeleteFromParent' that retrieves a Container object and calls one of the Container member functions.
Using a forward declaration I can retrieve a Container object in a Component function, but I still can't call any of the Container functions because the class has not yet been defined.
Any suggestions?
Thanks
Todd
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i m doing matlab c++ programming and I met some problems which I cannot solve.
to consider
[features, targets] = improved_DA1(x, [cluster,0.95]);
in matlab....
what should i do in order to call the [cluster,0.95] in Matlab C++ ?
i did try to use mwArray(cluster , 0.95) and i get the following compiling result:
matlabwizard\matlabfunction.cpp(102) : error C2665: 'mwArray::mwArray' : none of the 21 overloads can convert parameter 1 from type 'class mwArray'
C:\foo\matlabwizard\matlabfunction.cpp(103) : error C2664: 'matlabmain' : cannot convert parameter 1 from 'class mwArray' to 'int'
No user-defined-conversion operator available that can perform this conversion, or the operator cannot be called
can anyone help me?
thank you very much
Matlab C++ newbie
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Could someone tell me the realtionships between OnPaint / OnSize / OnCreate / OnInitialUpdate / OnUpdate of a view and it what process?
It seem they all get used and I cannot figure out in what sequence.
Which method should do the initial data processing - OnPaint ? MFC wizard notes " Do not use in view" , but it adds GetDocument code in OnPaint - why?
My application has several views ( graphics and data tables) of a document which initially has no data in it. I need to build all these views and than fill them up with data at random intervals. I have managed to build initial tiled views, but I am having trouble updating (UpdateAllViews) and resizing individual views. I have also noted that some of the methods are used more than once in a process - especially OnPaint. My basic test MFC MDI application seems to go thru several different sequences each time I start it.Thanks for your help. Vaclav
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Vaclav wrote:
It seem they all get used and I cannot figure out in what sequence.
You might want to set a breakpoint at the beginning of each one to see the order in which each is called. Be careful with OnPaint(), however, as it's called a bunch!
Vaclav wrote:
Which method should do the initial data processing
How about OnInitialUpdate()?
Five birds are sitting on a fence.
Three of them decide to fly off.
How many are left?
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How can you draw a bitmap outside of OnPaint() function?
calling "CPaintDC dc(this)" outside of OnPaint() compiles and executes, but doesnt work.
Kevin Shaffer
kshaff03@msn.com
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CDC* dc = GetDC();
dc->BitBlt(...);
ReleaseDC(dc);
--
Sancte Míchael Archángele, defénde nos in proélio contra nequítiam et
insídias diáboli esto præsídium. Imperet illi Deus, súpplices deprecámur:
tuque, princeps milítiæ cæléstis, Sátanam aliósque spíritus malígnos, qui
ad perditiónem animárum pervagántur in mundo, divína virtúte,
In inférnum detrude. Amen.
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Jorgen's method is one way. Another is to use CClientDC(this)
Ryan "Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"
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Hi,
I'm trying to develop an process host like "svchost.exe". But i'm in trouble with method calling from a different process. As a result i want to call a function from another process and get its return value. Can i do that? What way should i follow to do that? By the way i can get process number which i created.
Second question is, how can i create "wait status" process? These processes should be in wait status until i call a function from this process?
Thank you...
Orkun GEDiK
ASTRON
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Ok. But i can't use WaitForSingleObject() because processes should be in "wait status". I don't want to wait end of process. If i use WaitForSingleObject(), i should wait end of process. But process shouldn't be stop. Process should be wait for a signal from another process without termination.
Regards...
Orkun GEDiK
ASTRON
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For C++ code I am writing for a COM server I need a functionality where I have a fileName as Input and need to know if the File exists !
Preferably non MFC code is desired !
would a call like
string fileName
.
.
FILE *fPtr;
fPtr=fopen(fileName.c_str(), "r");
can i test fPtr and judge if the file is present or not ! Is it safe to do that ?
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A pure Win32 API solution:
<code>
bool DoesFileExist(LPCTSTR pFileName)
{
WIN32_FIND_DATA findData;
HANDLE hFind = FindFirstFile(pFileName, &findData);
if (hFind == INVALID_HANDLE_VALUE)
return false;
FindClose(hFind);
return true;
}</code>
Anyone who thinks he has a better idea of what's good for people than people do is a swine.
- P.J. O'Rourke
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Here are at least two ways:
_access();
_stat();
GetFileAttributes();
Five birds are sitting on a fence.
Three of them decide to fly off.
How many are left?
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Hi All!
Trying to get the image of a window using Hbitmap,DC,Memory DC and BitBlt.
This works fine, but since the function BitBlt copies from the screen, I am having tough time gettin the image of a hidden or partially shadowed window.
So is it possible to get the image of a window(even if its partially hidden) if we know its DC? I would also like to get more information on how does windows actually renders a DC. Can we force the rendering to a memory DC or memory buffer (instead to the screen) from where the image can be copied?
Thanks!
-Vladimir India
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u can send it a wm_paint message and pass a dc in
it should render to the dc u pass in
"there is no spoon"
biz stuff about me
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Sorry dear,
i'm afraid but wm_paint doesnt solves the problem!
-vladiir_india
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Hats off!
undoubtedly, its a great article.
But something strange happened when i used WM_PRINT. None of the windows got printed, except my very own application window.
Actually my application is kind of SPY++, so it identifies a window by mouse cursor position. The HWND is then send to the folowing function get_image().
following is the code snippet i'm using currently:
BOOL CVenomDlg::get_image(HWND hwnd)
{
HBITMAP hBitmap ;
HDC hdc,hdcMem;
BITMAP bitmap ;
RECT rc;
::GetWindowRect(hwnd,&rc);//get the bounding rectamgle
hdc=::GetDC(hwnd);//get the dc
hdcMem = ::CreateCompatibleDC (hdc) ;//create memory dc
hBitmap = ::CreateCompatibleBitmap (hdc, rc.right-rc.left, rc.bottom-rc.top) ;//create bitmap
::GetObject (hBitmap, sizeof (BITMAP), &bitmap) ;//get bitmap info into bitmap struct
::SelectObject (hdcMem, hBitmap) ;//make the bitmap as the surface of memory dc
::SendMessage(hwnd, WM_PRINT , (WPARAM) hdcMem,PRF_CHILDREN | PRF_CLIENT | PRF_ERASEBKGND | PRF_NONCLIENT | PRF_OWNED);
::ReleaseDC(hwnd,hdc);
//copy the data to clipboard also!
::OpenClipboard(hwnd);
::EmptyClipboard();
::SetClipboardData(CF_BITMAP, hBitmap);
::CloseClipboard();
//the clipboard contains a black rectangle???
//copy the image to static control...
//my own stuff to copy the hdcMem contents to a
//static control
.
.
.
.
::DeleteObject(hdcMem);
::DeleteObject(hBitmap);
return(TRUE);
}
-Vladimir India
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Hi,
From my SDI application I can open XML documents in my application using the Menus File | Open.
I want to open the XML documents in my application by right-clicking on the XML document and then selecting Open With and selecting my application.
Can anyone please tell me how I can do that?
It’s urgent
Thanks in advance
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Basically, you need to create a menu in the resource entry. Create a new menubar, but don't add the menubar to your frame window.
Now make a submenu and add your menu items. Make sure the "Open With" entry has the same ID as "Menu File | Open". This will reuse your already existing code to open an XML document since it will call the event handler you already have in your message map.
In your application you need to trap the right click event, i.e. WM_RBUTTONDOWN. Then fire up the submenu using this (pseudo)code:
HMENU hMenuBar = ::LoadMenu(hInstance, ID_OF_YOUR_NEWLY_CREATED_MENUBAR);
HMENU hSubMenu = ::GetSubMenu(hMenuBar, 0);
TrackPopupMenuEx(hSubMenu, TPM_SEE_MSDN_DOCS, x_coord, y_coord, 0, m_hWndOfEventReceiveingWindow, NULL);
Since you didn't specify what toolkit you are using, I used the Win32 API. If you are using MFC or ATL/WTL, you can easily find the corresponding functions since they more or less map 1:1
--
Sancte Míchael Archángele, defénde nos in proélio contra nequítiam et
insídias diáboli esto præsídium. Imperet illi Deus, súpplices deprecámur:
tuque, princeps milítiæ cæléstis, Sátanam aliósque spíritus malígnos, qui
ad perditiónem animárum pervagántur in mundo, divína virtúte,
In inférnum detrude. Amen.
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why do I need to create a menu? I guess I didn't make my problem clear enough.
any xml file in my computer-> right-click on it->Open With->Choose Program ->Other -> brows to and select my program -> OK.
so no menu creation is needed.
Now I just want to know if I do that how the XML file name is passed to my application and where do I capture that name to work on it.
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Ah, you want to create a shell extension.
Have you looked around here?[^] Michael Dunns "The Complete Idiot's Guide to Writing Shell Extensions" should get you going.
--
Sancte Míchael Archángele, defénde nos in proélio contra nequítiam et
insídias diáboli esto præsídium. Imperet illi Deus, súpplices deprecámur:
tuque, princeps milítiæ cæléstis, Sátanam aliósque spíritus malígnos, qui
ad perditiónem animárum pervagántur in mundo, divína virtúte,
In inférnum detrude. Amen.
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