C / C++ / MFC

13-Jun-07 22:11

Hi all

Let me explain my requirement.

I want to create a Activex control which has two methods SetPicture() and GetPicture().

SetPicture(VARIANT data) should copy the contents of the data to the clipboard and VARIANT GetPicture should return the contents of the clipboard. I know how to manage clipboard.

But I dont know how to manage the VARIANT to hold the bitmap. Could anyone point me to a good resource or spare time to tell me how to accomplish this.

Regards

The Best Religion is Science.
Once you understand it, you will know God.

Naveen13-Jun-07 22:36

13-Jun-07 22:36

Zainu wrote:
SetPicture(VARIANT data) should copy the contents of the data to the clipboard and VARIANT GetPicture should return the contents of the clipboard

Since you need to pass the bitmap between the same process, it better to pass the handle of the bitmap to and from the active-x.

Other option is to pass the bitmap's pixel data. i.e retrive the pixel data. set the pointer of the bits array to the VARIANT object then pass it. The activex should again covert this pixel data to bitmap.

I think the first one is simple.

nave

[OpenedFileFinder]

shiraztk13-Jun-07 23:11

13-Jun-07 23:11

Thankyou

If I want to pass the handle of the bitmap what should be the type of the VARIANT?

Regards

The Best Religion is Science.
Once you understand it, you will know God.

Naveen13-Jun-07 23:18

13-Jun-07 23:18

Zainu wrote:
what should be the type of the VARIANT?

VT_I4

cast the handle to a long value and set it to the lVal of the VARIANT.

nave

[OpenedFileFinder]

shiraztk13-Jun-07 23:51

13-Jun-07 23:51

Hi
Thats fine. Thankyou.

Now to test my activex i am using vb.
There I created a picturebox and am trying to set the picture property of picturebox using MyControl.GetBitmap (After copying a bitmap to the clipboard)

Should this work or is there anything else am to do. (Anyway this is not working as expected am getting an Object required error.
This is the VB code. Sorry for posting VB code in this forum, just for clarity

<br />
Dim bit As Variant<br />
bit = AaClipboard1.GetBitmap<br />
Picture1.Picture = bit // am getting error here.<br />
End Sub)<br />

Regards

The Best Religion is Science.
Once you understand it, you will know God.

Naveen14-Jun-07 0:21

14-Jun-07 0:21

hmm my VB is weak. How ever the Picture1.Picture is a IPictureDisp object. Please search whether there is any method to create IPictureDisp from HBITMAP.

like

Dim pic As IPictureDisp

pic == somefunction( var )
Picture1.Picture = pic

nave

[OpenedFileFinder]

shiraztk14-Jun-07 7:31

14-Jun-07 7:31

Hi
thankyou, i got it working.

I made it VARIANT long.
In vb I used a win32 api CreateFromHandle and passed the variant type.

Regards

The Best Religion is Science.
Once you understand it, you will know God.

Naveen14-Jun-07 14:00

Assertion occur when data saving

14-Jun-07 14:00

Zainu wrote:
win32 api CreateFromHandle

Win32 API??? I didnt find it in MSDN. Can you tell me where it is declared?

nave

[OpenedFileFinder]

Y_Kaushik13-Jun-07 21:52

13-Jun-07 21:52

Hello Friends

I am trying to make the user browse a file and save its contents in a folder (on local hard disk) I already did the browse part.

for the saving contant in folder, i am writing it inside this function:

char string[1001];
CString strLine = "";
CString buffer = "";

CStdioFile file;
file.Open("m_file", CFile::modeRead); [ m_file ==> file name ]
while(file.ReadString(strLine))
buffer += strLine;
file.Close();
text->SetWindowText( buffer ) ;

I am confusing m_file is file name or path name . and how i will be read the contant from buffer .
When i run this program an assertion occur

Plz any one help me or give some example for done this task.

Regard's
Kaushik

Jijo.Raj13-Jun-07 22:01

Jijo.Raj

13-Jun-07 22:01

Hi Kaushik,

The basic rule is,

1. If the file is in the same directory where you run you exe then only filename is enough.
2. If the file exist in different directory, then you need to provide the full filepath for opening it.

Hope it clears your doubt.

Regards,
Jijo.

________________________________

Yesterday is history,
Tomorrow is a mystery,
But today is a present.

Y_Kaushik13-Jun-07 23:38

13-Jun-07 23:38

First of all thanks for suggestion.

friend i am unable to copy file in to folder. I can save the file name in to database . ( My file will be always from outside the current folder so i use file path )

can you suggest me how can do this

Regard's
Kaushik

Naveen13-Jun-07 23:44

13-Jun-07 23:44

Y_Kaushik wrote:
can you suggest me how can do this

file.Open( "c:\\temp\\Myfile.txt", CFile::modeRead);

nave

[OpenedFileFinder]

David Crow14-Jun-07 2:50

David Crow

14-Jun-07 2:50

Y_Kaushik wrote:
When i run this program an assertion occur

What line of what file is asserting?

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Y_Kaushik14-Jun-07 4:08

14-Jun-07 4:08

This line is asserting

cfile_object.Open("zetaproducer.txt", CFile::modeRead);

here zetaproducer.txt is name of file

Regard's
Kaushik

David Crow14-Jun-07 4:13

David Crow

14-Jun-07 4:13

Y_Kaushik wrote:
This line is asserting

cfile_object.Open("zetaproducer.txt", CFile::modeRead);

Not possible, since there is no ASSERT() statement on that line.

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Mark Salsbery14-Jun-07 7:55

Mark Salsbery

14-Jun-07 7:55

From the docs: "One access permission and one share option are required"

Maybe try

cfile_object.Open("zetaproducer.txt", CFile::modeRead | CFile::shareDenyWrite);

"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

Y_Kaushik15-Jun-07 0:12

15-Jun-07 0:12

When i used this code

cfile_object.Open("zetaproducer.txt", CFile::modeRead | CFile::shareDenyWrite);

cfile_object.ReadString(strLine);
buffer += strLine + "\r\n";
text->SetWindowText( buffer );
MessageBox(buffer););

An blank MessageBox Show . Mense data can not be read.

Although my actual requirment is to save file in a folder suppose folder name is DOCFile in same folder ( In which my project)

I am not Understang where i am making Wrong

Regard's
Kaushik

Mark Salsbery15-Jun-07 5:48

Mark Salsbery

15-Jun-07 5:48

Is cfile_object a CStdioFile object? If so you could also add the CFile::typeText flag, although
if you don't specify CFile::typeBinary, CFile::typeText is the default.

For your requirement, you'll need to specify the full pathname of the file:

cfile_object.Open("driveletter:\\path\\DOCFile\zetaproducer.txt", CFile::modeRead | CFile::shareDenyWrite);

Also make sure Open() returns TRUE before trying to read from the file.

Mark

"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

Hamid_RT14-Jun-07 20:14

Hamid_RT

14-Jun-07 20:14

Where you got Assertion occur?

WhiteSky

Y_Kaushik15-Jun-07 0:14

15-Jun-07 0:14

When i am writing this code for reading contant of File from disk

cfile_object.Open("zetaproducer.txt", CFile::modeRead | CFile::shareDenyWrite);

cfile_object.ReadString(strLine);
buffer += strLine + "\r\n";
text->SetWindowText( buffer );
MessageBox(buffer);

An blank MessageBox Show . Mense data can not be read.

Although my actual requirment is to save file in a folder suppose folder name is DOCFile in same folder ( In which my project)

I am not Understang where i am making Wrong

Regard's
Kaushik

Regard's
Kaushik