C / C++ / MFC

preview a jpg or gif in open dialog

27-Apr-02 11:58

There are a number of applications that can be used to both execute and create AVI files on download.com

Cheers,
Tom Archer
Author, Inside C#

Please note that the opinions expressed in this correspondence do not necessarily reflect the views of the author.

Lucky the code machine27-Apr-02 10:05

Lucky the code machine

27-Apr-02 10:05

I want to preview a jpg or gif in open dialog? I use GetOpenFileNamePreview for showing avi files but havent found a way for images. is there a way or do i need to create some kinda shell around the standard box?
Thanx

An Expert is somone who has previously made ALL the Mistakes, I dream of this day. - Lucky

Access a Specific View in MainFrame :: MFC

valikac27-Apr-02 9:53

Re: Access a Specific View in MainFrame :: MFC

27-Apr-02 9:53

Hi.

I am working on a multiview program (two views). The design is done; however, I just found out I cannot cast GetActiveView() in main to any view I want. For example, let say I am in main and the active view is View#1, but I want to send a message or call a function in View#2.

How do you access *any* view, active or inactive, from main?

Thanks,
Kuphryn

Tom Archer27-Apr-02 10:05

Re: Access a Specific View in MainFrame :: MFC

27-Apr-02 10:05

Like many things in MFC, there are many answers here and it comes down to personal choice and your system design:

1) You could call the document's UpdateAllViews function and pass the desired message & data that way.
2) You could store the view pointers in a central place (such as the app object or the mainframe object) and then call a member functions to either send the data from that main object or to return the pointer so that you could then directly call the view's member functions

In situations like these there is no right or wrong way although I typically like to use the built in UpdateAllViews method.

Cheers,
Tom Archer
Author, Inside C#

Please note that the opinions expressed in this correspondence do not necessarily reflect the views of the author.

Michael P Butler27-Apr-02 10:11

Michael P Butler

27-Apr-02 10:11

I tend to store pointers to each view in my CWinApp derived class. I'm not sure it is the best way, but it works well for me as I tend to have multiple views connected to just one document class.

Michael Smile | :)

Communication is the first step towards enlightenment.

Re: Try to change your function location!

Masaaki Onishi27-Apr-02 10:28

Masaaki Onishi

27-Apr-02 10:28

Hello, the codegurus around the world.;)

Even though I don't know your code in detail, I guess that you will
change the location of your function in View2.

If the some funtions can share between View2 and View1, try to put
these functions to the other classes like Doc, Frame or WinApp.

This is mainly because if view2 doesn't get the current focus,
we don't need to send the message or call the function.
If the view2 gets the input focus, we should restore these data to update.

Or anyone has better idea?

Please, don't send me your email about your questions directly.
Have a nice day!
Sonork - 100.10571:vcdeveloper Wink | ;)

-Masaaki Onishi-

valikac27-Apr-02 11:08

27-Apr-02 11:08

Okay. I am using a split windows.

Here is the solution for a splitter design.

-----
CMyView2 *pView = reinterpret_cast<cmyview2 *="">(m_wndSplitter.GetPane(1, 0));

pView->SendMessage(WM_USER_TEST, 0, 0);

return 0;
-----

Thanks to LordShade of GameDev for for the pointer.

Kuphryn

Tom Archer27-Apr-02 11:15

27-Apr-02 11:15

You didn't mention that you're using a splitter. In that case, the views are created in the mainframe and can be accessed through the mainframe's splitter window member variable.

Cheers,
Tom Archer
Author, Inside C#

Please note that the opinions expressed in this correspondence do not necessarily reflect the views of the author.

valikac27-Apr-02 11:47

27-Apr-02 11:47

Thanks.

I did not think that the splitter window would affect it.

Kuphryn

Tom Archer27-Apr-02 11:53

27-Apr-02 11:53

No problem. The effect it would have on anyone's answer is that with a splitter, you already have a "built-in" place to get the views (the CMainFrame::m_wndSplitter).

Anyway, no worries. I'm glad you got your code to work. Just remember to be a bit more detailed when asking for help as it aids others in getting you the response you need.

Cheers,
Tom Archer
Author, Inside C#

Please note that the opinions expressed in this correspondence do not necessarily reflect the views of the author.

valikac27-Apr-02 11:54

27-Apr-02 11:54

I definitely will be more descriptive in the future.

Thanks,
Kuphryn

Messages

Wizard_0127-Apr-02 8:12

Wizard_01

27-Apr-02 8:12

Is any way to accept messages from child window ==> parent windows for processing(translate message). And if message isnt WM_LBUTTONDOWN send message to child window. (child window never conceive WM_LBUTTONDOWN but user click on it - without WS_DISABLE)

Wiizi Smile | :)

Re: Messages

Michael P Butler27-Apr-02 10:13

Michael P Butler

27-Apr-02 10:13

Have a look at PreTranslateMessage, I think it will do what you are wanting.

Michael Smile | :)

Communication is the first step towards enlightenment.

Re: Messages

Tom Archer27-Apr-02 11:10

Adding own things to the explorer browser

27-Apr-02 11:10

You need to override the WindowProc function. Here's an example of doing that where I'm not allowing the OK button's normal processing to continue (by returning FALSE from the function).

if (message == WM_COMMAND && LOWORD(wParam) == IDOK)
{
  TRACE("I got this click and I'm not allowing it to process!!");
  return FALSE;
}

If I want the button to handle it's message, then I simply return the return value of the base class' WindowProc function:

return CDialog::WindowProc(message, wParam, lParam);

Also, you can use the hwnd of the control (I used the resource id) by referencing the lParam argument (instead of the low byte of the wParam).

Cheers,
Tom Archer
Author, Inside C#

Please note that the opinions expressed in this correspondence do not necessarily reflect the views of the author.

<k>Andreas Hoheisel27-Apr-02 8:10

<k>Andreas Hoheisel

27-Apr-02 8:10

I worte a litte command line programm where i can access ReiserFS Partitions. Now i want add this capability to the explorer. So anyone knows if its possible to add for eg. a new drive in the explorer window...

Thanks

Re: Adding own things to the explorer browser

Michael Dunn27-Apr-02 8:39

Michael Dunn

27-Apr-02 8:39

There are two approaches you can take. One is to write a device driver, which can be assigned a drive letter. The other is to write a namespace extension which can add a folder under My Computer (along side Control Panel). I have a tutorial on namespace extensions in the Shell section.

--Mike--
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Big fan of Alyson Hannigan and Jamie Salé.

Re: Adding own things to the explorer browser

<k>Andreas Hoheisel28-Apr-02 8:56

<k>Andreas Hoheisel

28-Apr-02 8:56

Thanks Michael. I made it now with namespace extensions, well its a good sollution but cause i have some time atm. (student Smile | :)

i want try it with a device driver. Anyone have some ideas or links about device driver?

drag drop a bitmap

shokisingh27-Apr-02 7:15

shokisingh

27-Apr-02 7:15

any one who can help me about dragndrop a bitmap in vc++ Blush | :O

if anyone has any information regarding it, please mail me if u can, that would be a lot of help,
thanks in advance

Ashok Singh
<west end="" india="">

Re: drag drop a bitmap

Tom Archer27-Apr-02 11:13