Why can't it show a whole bitmap in listctrl in icon form - C / C++ / MFC Discussion Boards

Wamuti19-Jun-07 3:17

19-Jun-07 3:17

Ha! Thanks;).

I have gotten that bug.As i was going through the header file, i found I had made two DECLARE_MESSAGE_MAP(), one in CMenusWin class and the other in CGuessDialog class D'Oh! | :doh:

It now works! Thanks so so much.

TreeS

How to: Structure initialization

Programm3r19-Jun-07 0:01

Programm3r

19-Jun-07 0:01

Hi all,

I would like to know whether it is possible to construct a structure so that one of it's variables can be initialized with out the other being effected ?? i.e

struct foo
{
   char a[128];
   char b[128];
}FOODOO[100] = {"to A","to A again"}; // a must have both values

Thanks in advance
Regards,

The only programmers that are better than C programmers are those who code in 1's and 0's..... Smile | :)

Programm3r
My Blog: ^_^

Re: How to: Structure initialization

Rage19-Jun-07 0:27

Rage

19-Jun-07 0:27

If such a thing should work, then it would be :

= {{"to A",},{"to A again",},{...}};

But I hope for C++'s sake that this is not possible Smile | :)

I think you will have to go through an init function. BTW, this smells like a bad design ...

Re: How to: Structure initialization

Programm3r19-Jun-07 0:47

Programm3r

19-Jun-07 0:47

Thanks ... makes sense Smile | :)

Regards,

The only programmers that are better than C programmers are those who code in 1's and 0's..... Smile | :)

Programm3r
My Blog: ^_^

Difference between DLL & Process ???

amitmistry_petlad 18-Jun-07 23:45

amitmistry_petlad

18-Jun-07 23:45

Hi All!
What is the difference between DLL and process???

amit

"Success lies not in the result , But in the efforts !!!!!"
Amit Mistry - petlad -Gujarat-India

Re: Difference between DLL & Process ???

Programm3r19-Jun-07 0:05

Programm3r

19-Jun-07 0:05

Hi,

DLL
====
1.DLL is inprocess
2.In one windows Application, if any problem in DLL, just that specific form or part only will not work.but if any problem in Exe, entire application will not work.

EXE
====
1.Executable file
2.exe is outprocess

An EXE can run independently, whereas DLL will run within an EXE. DLL is an in-process file and EXE is an out-process file

for detail information plz look the below link

http://dotnetspider.com/qa/Question34260.aspx
http://dotnetspider.com/qa/Question36124.aspx
http://dotnetspider.com/qa/Question17736.aspx
http://dotnetspider.com/qa/Question12712.aspx

Regards,

The only programmers that are better than C programmers are those who code in 1's and 0's..... Smile | :)

Programm3r
My Blog: ^_^

Re: Difference between DLL & Process ???

karle19-Jun-07 0:08

karle

19-Jun-07 0:08

A dll is a dynamic library, a collection of functions and methods.
This library kann be linked to an executable (.exe).

Windows creates a process for each executable which is started.
A process just exists in memory of your OS.
A process has an Name and an ID (see task manager).
A process executes code which ca reside in a dll.

Why can't it show a whole bitmap in listctrl in icon form

Chen-XuNuo18-Jun-07 23:32

Chen-XuNuo

18-Jun-07 23:32

I want to show bitmaps in icon form as previewings,just like the example thumbnail in cp,but I found that the item is just a section of the bitmap.

1.I import a bitmap to resource,modify its ID to IDB_BITMAP1.
2.I accociate a listctrl to m_listctrl.
3.I create: CImageList m_imagelist.
4.The last I do this in OnInitDialog():
//Load a bitmap
CBitmap bitmap;
bitmap.LoadBitmap(IDB_BITMAP1);

m_imagelist->Create(200,200,ILC_COLOR24,1,4);
m_imagelist->Add(&bitmap,RGB(255,0,0));
m_listctrl.SetImageList(m_imagelist,LVSIL_NORMAL);

m_listctrl.InsertItem(0,"1",0);

The result is the item in listctrl is just section of the bitmap,why?
Thanks~

Re: Why can't it show a whole bitmap in listctrl in icon form

Rage18-Jun-07 23:42

Rage

18-Jun-07 23:42

Chen-XuNuo wrote:
just section of the bitmap

You can choose between 16*16 or 32*32 icons for a listctrl, I think. I suppose you r bitmap is shrinked to 32*32. (not sure, however).

Constantly "Saving the day" should be taken as a sign of organizational dysfunction rather than individual skill - Ryan Roberts[^]

Re: Why can't it show a whole bitmap in listctrl in icon form

Chen-XuNuo18-Jun-07 23:49

Chen-XuNuo

18-Jun-07 23:49

What do you mean~?And how can I do?

Besides,if I change the m_imagelist.Create to
m_imagelist.Create(300,300,...),it shows a bigger section of the bitmap~

Re: Why can't it show a whole bitmap in listctrl in icon form

Rage19-Jun-07 0:22

Rage

19-Jun-07 0:22

What is your bitmap size, then ? And how much is displayed ?

Constantly "Saving the day" should be taken as a sign of organizational dysfunction rather than individual skill - Ryan Roberts[^]

Re: Why can't it show a whole bitmap in listctrl in icon form

Hamid_RT19-Jun-07 0:47

Hamid_RT

19-Jun-07 0:47

Can you see a bitmap correct or no

WhiteSky

Re: Why can't it show a whole bitmap in listctrl in icon form

Chen-XuNuo19-Jun-07 6:29

Chen-XuNuo

19-Jun-07 6:29

I can see it,but only a section of the bitmap.
If I set 200*200,and the program shows 200*200 of the bitmap,how can I change the bitmap size?

Re: Why can't it show a whole bitmap in listctrl in icon form

James R. Twine19-Jun-07 4:48

James R. Twine

19-Jun-07 4:48

   If your bitmap is 500x500, but your image list is designed to hold images that are 200x200, you will only see the upper-left of the bitmap. That is expected behavior - the Imagelist control will not automatically scale images for you - you will have to do that yourself.

   Also note that since you specified ILC_COLOR24 when creating the Imagelist control, setting a Mask value in the call to Add(...) will have no effect - Masks only work on 8-bit (or lower) bitmaps.

   Peace!

-=- James
Please rate this message - let me know if I helped or not!<HR>If you think it costs a lot to do it right, just wait until you find out how much it costs to do it wrong!
Avoid driving a vehicle taller than you and remember that Professional Driver on Closed Course does not mean your Dumb Ass on a Public Road!
See DeleteFXPFiles

Re: Why can't it show a whole bitmap in listctrl in icon form

Chen-XuNuo19-Jun-07 6:27

Chen-XuNuo

19-Jun-07 6:27

I don't know my bitmap's size,but it must larger than 200*200.
You said I should do it myself,but how can I do?To change the bitmap's size?
Besides,what is the purpose of the mask?

Thanks~

Re: Why can't it show a whole bitmap in listctrl in icon form

James R. Twine19-Jun-07 6:56

James R. Twine

19-Jun-07 6:56

   You can use some software, like MSPaint, or the GIMP[^], to scale the images outside of the application. If you need to scale it internally, you can use GDI/GDI+ to draw the bitmap scaled directly into the appropriate area of the Imagelist control.

   This is a bit tricky if you have a large number of images. Basically, you preallocate the space for the images in the Imagelist control using the ImageList_SetImageCount(...) macro, extract IMAGEINFO structures for each image "space" using the ImageList_GetImageInfo(...) macro, and then drawing the scaled-down image directly into the IMAGEINFO::hbmImage bitmap area.

   Got all that? :P

   Also, the "mask" is a color (or an area of the image) that is considered transparent when the image is drawn. In other words, the "mask" color (or area) is not drawn when the image is drawn onto the control.

   Peace!

Re: Why can't it show a whole bitmap in listctrl in icon form

Chen-XuNuo19-Jun-07 22:41

Chen-XuNuo

19-Jun-07 22:41

Thanks~
But I am confused that I don't know how to resize the bitmaps before insert them to imagelist,is there any fuctions to do this?

And I have refer to the example http://www.codeproject.com/listctrl/thumbnail.asp?df=100&forumid=1951&fr=51[^] in cp.I found it do nothing to resize the bitmaps,but they are automaticly showed in thumbnails.Why` Confused | :confused:

James R. Twine wrote:
extract IMAGEINFO structures for each image "space" using the ImageList_GetImageInfo(...) macro, and then drawing the scaled-down image directly into the IMAGEINFO::hbmImage bitmap area.

What is the purpose of this?I can only get the information in imagelist through this.And if I change the IMAGEINFO what I get from it ,nothing changed. Dead | X|

Re: Why can't it show a whole bitmap in listctrl in icon form

James R. Twine20-Jun-07 0:04

James R. Twine

20-Jun-07 0:04

You need to look at the code for that project before asking... That project uses GDI+ code to generate the thumbnails and then adds the thumbnails to the imagelist control used by the listview control.

Bitmap img( A2W(strPath) );
Bitmap* pThumbnail = static_cast<Bitmap*>(<code>img.GetThumbnailImage(THUMBNAIL_WIDTH, THUMBNAIL_HEIGHT, NULL, NULL)</code>);
// attach the thumbnail bitmap handle to an CBitmap object
pThumbnail->GetHBITMAP(NULL, &hBmp);
pImage = new CBitmap();		 
pImage->Attach(hBmp);
// add bitmap to our image list
m_ImageListThumb.Replace(i, pImage, NULL);

The Bitmap::GetThumbnailImage(...) function scales the image for you returning a new one.

Peace!

Re: Why can't it show a whole bitmap in listctrl in icon form

Chen-XuNuo20-Jun-07 3:01

Chen-XuNuo

20-Jun-07 3:01

Oh~~~~~~~~~~~~I seldom do the GDI+ and I haven't use the "Bitmap" before.When I do this in my project:

HBITMAP hBitmap=LoadBitmap(AfxGetApp()->m_hInstance,MAKEINTRESOURCE(IDB_BITMAP1));
m_imagelist->Create(200,200,ILC_COLOR24|ILC_MASK,1,4);
Bitmap img(hBitmap);
Bitmap* pThumbnail = static_cast<Bitmap*>(img.GetThumbnailImage(200, 200, NULL, NULL));
pThumbnail->GetHBITMAP(NULL, &hBitmap);
CBitmap bitmap;
bitmap.Attach(hBitmap);

m_imagelist->SetImageCount(1);
m_imagelist->Replace(0,&bitmap,NULL);

m_listctrl.SetImageList(m_imagelist,LVSIL_NORMAL);
m_listctrl.InsertItem(0,"1",0);

There are errors:
D:\Code\I Do\ListControl2\ListControl2Dlg.cpp(143) : error C2065: 'Bitmap' : undeclared identifier
D:\Code\I Do\ListControl2\ListControl2Dlg.cpp(143) : error C2146: syntax error : missing ';' before identifier 'img'
D:\Code\I Do\ListControl2\ListControl2Dlg.cpp(143) : error C2065: 'img' : undeclared identifier
D:\Code\I Do\ListControl2\ListControl2Dlg.cpp(144) : error C2065: 'pThumbnail' : undeclared identifier
D:\Code\I Do\ListControl2\ListControl2Dlg.cpp(144) : error C2061: syntax error : identifier 'Bitmap'
pThumbnail->GetHBITMAP(NULL, &hBitmap);
Sigh | :sigh:

Re: Why can't it show a whole bitmap in listctrl in icon form

Chen-XuNuo20-Jun-07 3:16

Chen-XuNuo

20-Jun-07 3:16

Maybe I should include the head file gdiplus.h`
Do you have it?Please send to my email~
Thanks~

Re: Why can't it show a whole bitmap in listctrl in icon form

Chen-XuNuo20-Jun-07 3:25

Chen-XuNuo

20-Jun-07 3:25

Mm..I have downloaded the gdiplus.h ~But many new errors occur~My god`
Basically the errors are about the file gdiplusinit.h~
For example:
c:\program files\microsoft visual studio\vc98\include\gdiplusinit.h(39) : error C2065: 'ULONG_PTR' : undeclared identifier

Re: Why can't it show a whole bitmap in listctrl in icon form

James R. Twine20-Jun-07 4:55

James R. Twine

20-Jun-07 4:55

   You need to download the entire platform SDK (which may now be called the Windows SDK?), and then install and configure it.

   Then you should be able to use GDI+.

   Peace!

Re: Why can't it show a whole bitmap in listctrl in icon form

Chen-XuNuo20-Jun-07 21:02

Chen-XuNuo

20-Jun-07 21:02

I have installed it.And I find that GDI+ is a good thing.
Do you know how to use Bitmap( Class type, String resource )?
Because my bitmap is in the resource,but I don't know how to set the parameter "Class type"~

Re: Why can't it show a whole bitmap in listctrl in icon form

James R. Twine21-Jun-07 1:45

James R. Twine

21-Jun-07 1:45

   You can use the thumbnail project mentioned earlier for examples on how to use some parts of GDI+.

   The GDI+ documentation is going to be where you need to go now for more details on how to use it.

   Good luck!

   Peace!

Re: Why can't it show a whole bitmap in listctrl in icon form

Chen-XuNuo21-Jun-07 16:37

Chen-XuNuo

21-Jun-07 16:37

Thanks a lot for helping me so much~ Rose | [Rose]

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