Re: 880231 - overriding keyboard behaviour - C / C++ / MFC Discussion Boards

Re: ineed a source code before this friday

jeron121-May-09 4:50

jeron1

21-May-09 4:50

Save a couple of beers for me! That site sure is a great time saver.
Laugh | :laugh:

Re: ineed a source code before this friday

CPallini21-May-09 7:04

CPallini

21-May-09 7:04

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Re: ineed a source code before this friday

bulg21-May-09 11:41

bulg

21-May-09 11:41

I'm not exactly sure what its doing, but it seems to give me more pertinent answers than Wolfram Alpha, so I like it Thumbs Up | :thumbsup:

Re: ineed a source code before this friday

Stuart Dootson21-May-09 4:37

Stuart Dootson

21-May-09 4:37

Have you consulted with your classmate who's already asked a very similar question in this forum[^]?

He at least gave himself a little more time than you and asked a slightly more targeted question.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

880231 - overriding keyboard behaviour

ilostmyid221-May-09 1:11

ilostmyid2

21-May-09 1:11

hi as we know, in a dialog box Tab and Shift+Tab change focus between ctrls, Tab to the next one and Shift+Tab to the previous one. when handling the keyboard event generated, we see that both generates the same event with the same wParam (0x09) and lParam (0x000d0001).
so how a dialog figures out which one is hit? apparently by using the function GetKeyState at the moment of handling the message. alright?
now, in a system with no tab key i want to use Up and Down keys in the place of them. at this moment the problem gets produced.
in the PreTranslateMessage of my application, i just change wParam from VK_DOWN into VK_TAB. the PreTranslateMessage of the base class (CWinApp) thinks Tab is hit instead of Down arrow. this is the behavior i intend and it's ok. but what can i do when the user hits Up arrow and expect the previous ctrl gets focused?
do i need to use SetKeyboardState and this is the only way to simulate hitting Shift key?
what can i do?
thx

Re: 880231 - overriding keyboard behaviour

jeron121-May-09 5:18

jeron1

21-May-09 5:18

Maybe this[^] article will help, with a couple of possible alternatives.

Re: 880231 - overriding keyboard behaviour

Stuart Dootson21-May-09 5:36

Stuart Dootson

21-May-09 5:36

The other way to do it would be to replicate Windows tab-handling for VK_UP and VK_DOWN in the PreTranslateMessage method...

BOOL CtestmfcDlg::PreTranslateMessage(MSG* pMsg)
{
   if (pMsg->message == WM_KEYDOWN)
   {
      if (pMsg->wParam == VK_UP)
      {
         CWnd* prev = GetFocus()->GetNextWindow(GW_HWNDPREV);
         if (!prev) prev = GetFocus()->GetNextWindow(GW_HWNDLAST);
         if (prev) prev->SetFocus();
         return TRUE;
      }
      else if (pMsg->wParam == VK_DOWN)
      {
         CWnd* next = GetFocus()->GetNextWindow(GW_HWNDNEXT);
         if (!next) next = GetFocus()->GetNextWindow(GW_HWNDFIRST);
         if (next) next->SetFocus();
         return TRUE;
      }
   }

   return CDialog::PreTranslateMessage(pMsg);
}

(tested with VS2010 Beta 1 - woo-hoo!)

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Re: 880231 - overriding keyboard behaviour

ilostmyid224-May-09 1:04

ilostmyid2

24-May-09 1:04

this is a good method. indeed doing what the dialog itself does in handling these keys again in our code for another keys. but when there're many dialogs in the program and i'm not going to derive them from a common base and put this code in its PreTranslateMessage method makes it a bit not a straightforward method. the code i've to write is what the others also r working on. all keyboard handlings must occur in the application's PreTranslateMessage. i know that it's not a logical limitation, but this is what i can do.

Re: 880231 - overriding keyboard behaviour

ilostmyid224-May-09 1:23

ilostmyid2

24-May-09 1:23

please notice the following code i put in the application's PreTranslateMessage:

...<br />
case VK_DOWN:<br />
	pMsg->wParam=VK_TAB;<br />
	BYTE byKeybState[256];<br />
	GetKeyboardState(byKeybState);         <br />
	byKeybState[VK_SHIFT] = !(BOOL)GetKeyState(VK_SHIFT);  // or TRUE<br />
	SetKeyboardState(byKeybState);<br />
	break;<br />
...<br />

it must work. right?
but in CE it seems that GetKeyboardState and SetKeyboardState functions r not available. what can i do?

Re: 880231 - overriding keyboard behaviour

Stuart Dootson24-May-09 1:46

Stuart Dootson

24-May-09 1:46

I'd use GetAsncKeyState[^] (which is in CE) and the SendInput technique documented in the other answer. The following pseudo-code shows the approach I'd use:

if (GetAsyncKeyState shows Shift is pressed)
{
   use SendInput to send { Tab key press, Tab key release };
}
else
{
   use SendInput to send { Shift key press, Tab key press, Tab key release, Shift key release };
}

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Re: 880231 - overriding keyboard behaviour

ilostmyid224-May-09 3:17

ilostmyid2

24-May-09 3:17

thank u

i think this is the solution i was looking for.
i'm going to implement it.

Re: 880231 - overriding keyboard behaviour

ilostmyid224-May-09 5:56

ilostmyid2

24-May-09 5:56

yeah, that's it!
thx Smile | :)

How to Create and format partitions

Madan Chauhan20-May-09 23:45

Madan Chauhan

20-May-09 23:45

Hi all,
I am creating an application for windows Vista, XP and 2003Server. In my application I need to create and format partitions(Extended and primary both). I do not want to use DISKPART utility. Is there any other way to do this job like by using any win32API or any function provided by Microsoft in MSDN?

Please give me some suggestions.

Thanks

Re: How to Create and format partitions

C++myLife21-May-09 0:52

C++myLife

21-May-09 0:52

Ya ofCourse, you can use DeviceIoControl codes. for creating any partition (primary or logical) IOCTL_DISK_SET_DRIVE_LAYOUT can be used. Big Grin | :-D

Re: How to Create and format partitions

Madan Chauhan21-May-09 1:11

Madan Chauhan

21-May-09 1:11

Thanks CMylife.

I am going to implement it now. I will consult you after trying it.

thanks

Re: How to Create and format partitions

C++myLife21-May-09 1:49

C++myLife

21-May-09 1:49

Its good that you are trying yourself. nothing you have to do. u first of all get the all partitions information by using IOCTL_DISK_GET_DRIVE_LAYOUT, then just edit the partition number, its offset, size and the last parameter , set that to true and finally run the IOCTL_DISK_SET_DRIVE_LAYOUT code from there itself. and then you are done with a new partition.

All the best.

Big Grin | :-D

Re: How to Create and format partitions

Madan Chauhan21-May-09 22:17

Madan Chauhan

21-May-09 22:17

Thanks CMyLife.
I am not sure that you will get my query today coz this thread is of one day old.
I have successfully created the partition using IOCTL_DISK_SET_DRIVE_LAYOUT. But now I am stuck in formatting this raw partition.
There is one function FormatEx() but it is only for Vista. Is there any other way to format partition without using DISKPART and SHFormatDrive like some ioctl code.

Thanks

Re: How to Create and format partitions

Hamid_RT21-May-09 2:26

Hamid_RT

21-May-09 2:26

Did you see FormatPartition and CreatePartition?

Of one Essence is the human race
thus has Creation put the base
One Limb impacted is sufficient
For all Others to feel the Mace
(Saadi )

Re: How to Create and format partitions

Stephen Hewitt21-May-09 4:00

Stephen Hewitt

21-May-09 4:00

These look like they're for Windows CE.

Steve

Re: How to Create and format partitions

C++myLife21-May-09 20:44

C++myLife

21-May-09 20:44

google for FMIFS.h and FMIFS.dll to format any volume.

Big Grin | :-D

Re: How to Create and format partitions

Madan Chauhan21-May-09 22:22

Madan Chauhan

21-May-09 22:22

OH... Pardon me I have quoted you without reading this reply from ur side.

I am just checking for these FMIFS.h and FMIFS.dll

Thanks

Create CBitmap from array of RGB values

sashoalm20-May-09 23:00

sashoalm

20-May-09 23:00

I want to create a CBitmap which I can them put inside an image list. Now I have the width, height and an array of RGB values. How can I create a valid CBitmap object from that?

There is sufficient light for those who desire to see, and there is sufficient darkness for those of a contrary disposition.
Blaise Pascal

Re: Create CBitmap from array of RGB values

Russell^'20-May-09 23:52

Russell^'

20-May-09 23:52

Create an hidden CDC, attach the bitmap to it then use CDC::SetPixel for example
There is also CBitmap::SetBitmapBits

Russell

Re: Create CBitmap from array of RGB values

sashoalm21-May-09 5:04

sashoalm

21-May-09 5:04

Hi, Russell

Thanks for replying. CDC::SetPixel would be too slow for me, I need to make thumbnails of potentially many files. CBitmap::SetBitmapBits doesn't seem to accept width/height in the params.

There is sufficient light for those who desire to see, and there is sufficient darkness for those of a contrary disposition.
Blaise Pascal

Re: Create CBitmap from array of RGB values

Stuart Dootson21-May-09 5:45

Stuart Dootson

21-May-09 5:45

sashoalm wrote:
CBitmap::SetBitmapBits doesn't seem to accept width/height in the params

According to my VS2008 MSDN, SetDIBits[^] should be used in preference to SetBitmapBits. SetDIBits allows you to specify the bitmap size, I believe.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

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