C / C++ / MFC

CListbox is not refrashed

12-Oct-10 3:55

For monitoring when a PC is started up, you'll need a service. For shutting down, you'll need to respond to the WM_ENDSESSION message.

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aangerma11-Oct-10 21:56

aangerma

11-Oct-10 21:56

Hello,
I have a dialog box that contains a list box ,the problam is that if another window is cover the list box its delete the content of the listbox on the place that was covered and its not being apdate until I click on the listbox with the mouse or resizing it,
what can I do in order the listbox will be update outomatically?

thanks

Re: CListbox is not refrashed

David Crow12-Oct-10 3:58

How can identify Mouse Click event in PreTranslateMessage?

12-Oct-10 3:58

This is not the default behavior of a listbox. What setting(s) have you changed?

Le@rner11-Oct-10 21:06

GDI drawing onto a 4-bit bitmap

11-Oct-10 21:06

Hi all,

i want indentify all mouse click event in PreTranslateMessage,

but when i use WM_LBUTTONDOWN than WM_LBUTTONDBLCLK portion never called,

please tell me how can i identifies all events seprately.

please help me for this.

thanks in advance.

Code-o-mat11-Oct-10 10:53

Code-o-mat

11-Oct-10 10:53

Greetings folks!

I created a DIB section with 4 bits per pixel, so 16 colors. I selected this DIB into a DC and am trying to draw into it using FillSolidRect and Ellipse, but all i get are zeroes in the pixel data. I specified the palette entries when creating the DIB, i also tried creating a CPalette from the DIB's palette and selecting it for the DC before drawing but no matter what i do i get nothing but zeroes. All the drawing code succeeds, so there's no visible indication of failure. What might i be doing wrong here? Here's some stripped down code:

unsigned char BIHeadMem[sizeof(BITMAPINFO) + 16 * sizeof(RGBQUAD)] = {0};
BITMAPINFO &BIHead = *(BITMAPINFO *)BIHeadMem;

BIHead.bmiHeader.biSize           = sizeof(BIHead.bmiHeader);
BIHead.bmiHeader.biBitCount       = 4;
BIHead.bmiHeader.biClrImportant   = 0;
BIHead.bmiHeader.biClrUsed        = 0;
BIHead.bmiHeader.biCompression    = BI_RGB;
BIHead.bmiHeader.biSizeImage      = 0;
BIHead.bmiHeader.biXPelsPerMeter  = 0;
BIHead.bmiHeader.biYPelsPerMeter  = 0;
BIHead.bmiHeader.biWidth          = 32;
BIHead.bmiHeader.biHeight         = -32;
BIHead.bmiHeader.biPlanes         = 1;

for (int I = 0; I < 16; I++)
{
  BIHead.bmiColors[I].rgbRed      = BIHead.bmiColors[I].rgbBlue = BIHead.bmiColors[I].rgbGreen = (BYTE)I;
  BIHead.bmiColors[I].rgbReserved = 0;
}

void *DummyPixels;
CBitmap bmp;
bmp.Attach(CreateDIBSection(NULL, &BIHead, DIB_RGB_COLORS, &DummyPixels, NULL, 0)); //The creation succeeds...

CDC memDC;
memDC.CreateCompatibleDC(NULL);  //Creation succeeds...
memDC.SelectObject(&bmp); //SelectObject succeeds...

//Here i also tried creating a LOGPALETTE from the DIB's pal, making a CPalette from that and select it for memDC
//with CDC::SelectPalette (and CDC::RealizePalette) but this seems to make no difference whatsoever

memDC.FillSolidRect(0, 0, fSizeCache.WellSize, fSizeCache.WellSize, RGB(0, 0, 0)); //Success

CPen    pen;
CBrush  brush(RGB(2, 2, 2));

pen.CreatePen(PS_SOLID, 1, RGB(1, 1, 1));
memDC.SelectObject(&brush);
memDC.SelectObject(&pen);
memDC.Ellipse(0, 0, 32, 32); //Success...

When i check the memory pointed at by DummyPixels, it's all zeroes, if i write to this memory "manually" the palette indexes from 0 to 15 i get what i expect when blitting the DIB to antoher DC, so the DIB itself should be ok. I guess the problem here is something completely obvious and i am just not aware of it. Thanks in advance for any help.

> The problem with computers is that they do what you tell them to do and not what you want them to do. <
> "It doesn't work, fix it" does not qualify as a bug report. <
> Amazing what new features none of the programmers working on the project ever heard of you can learn about when reading what the marketing guys wrote about it. <

Drop-down list in floating toolbar clipped to main window

John Ritzenthaler11-Oct-10 7:31

John Ritzenthaler

11-Oct-10 7:31

I have a toolbar that uses a drop-down list. The list is owner-drawn and based on CListBox. It's displayed when the user pressing a button in the toolbar. When the toobar is floated outside the main window and the list is dropped, the list is clipped to the main window. Anyone know how to override that behavior?

I tried changing the parent from the main window to the desktop window but the draw messages don't get reflected to the list box.

I tried it with and without the WS_CHILD attribute.

File List

Jonnster11-Oct-10 6:14

Jonnster

11-Oct-10 6:14

I need a MFC app which I can give a directory and it will create a list of all files within that directory and sub directories. From this list it will then check the last time each file was modified. What would be the best way of going about this? I think of several ways of doing it but would like an opinion on what other people think would be the best way forward. Thanks.

Re: File List

elchupathingy11-Oct-10 7:14

elchupathingy

11-Oct-10 7:14

FindFirstFile, FindNextFile, should do it quite easily. Just need to look at what you need to pass to it in terms of parameters. Or use CFileFind for straight MFC.

Problem in Using CEdit box control.

Le@rner11-Oct-10 2:33

11-Oct-10 2:33

Hi all,

i m using Edit box control with multiline and want return property.

here i am paste very long file in this edit box but when i paste here full file data not paste and also when i trying to write some thiing its not written, while i m not use SetLimitText any where.

please tell me how can i paste any length of data in edit box.

thanks in advance.

bleedingfingers11-Oct-10 2:50

bleedingfingers

11-Oct-10 2:50

Use ES_MULTILINE.

...byte till it megahertz...

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Le@rner11-Oct-10 2:51

11-Oct-10 2:51

i alraedy mention thet i already use it.

bleedingfingers11-Oct-10 2:55

bleedingfingers

11-Oct-10 2:55

Ok, I couldn't get that from your language.

Now, what exactly is the problem, you are neither able to paste anything nor able to type anything? Is that edit box readonly by any chance?

...byte till it megahertz...

my donation to web rubbish

Cool_Dev11-Oct-10 3:12

Cool_Dev

11-Oct-10 3:12

when I tried CEdit::GetLimitText(), it returned 30,000. This is in contrast with what is described here in remarks http://msdn.microsoft.com/en-us/library/bb761647%28VS.85%29.aspx[^]. I think your problem is when exceeding this 30,000 characters. Try calling CEdit::SetLimitText() with much bigger value and count the number of characters you could paste/type.

David Crow11-Oct-10 4:13

11-Oct-10 4:13

A multi-line edit control can only hold 64K characters. Use a richedit control instead.

Le@rner11-Oct-10 18:19

11-Oct-10 18:19

what is the max limit of rich edit?

David Crow12-Oct-10 3:32