Re: Compressed image movement is too slow - C / C++ / MFC Discussion Boards

Mouse Event

john563225-Feb-10 20:49

john5632

25-Feb-10 20:49

Hi,

How can I simulate keyborad key pressed on mouse click.

Like Atl+Ctrl+1 , how to simulate with mouse?

Re: Mouse Event

KarstenK25-Feb-10 21:10

KarstenK

25-Feb-10 21:10

Mouse or keyboard input can be simulated via Send or Postmessage. There are meassges or it like WM_MOUSECLICK and WM_KEYDOWN messages. Read the MSDN for details.

Press F1 for help or google it.
Greetings from Germany

Re: Mouse Event

«_Superman_»25-Feb-10 21:16

«_Superman_»

25-Feb-10 21:16

Take a look at the SendInput[^] API.

«_Superman_»
I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

Re: Mouse Event

wangningyu26-Feb-10 21:07

wangningyu

26-Feb-10 21:07

1、keyboard event:

keybd_event(VK_CONTROL,0,0,0);
keybd_event(VK_MENU, 0, 0, 0);  
keybd_event('S', 0, 0, 0);   
 
keybd_event('S', 0, KEYEVENTF_KEYUP, 0);   
keybd_event(VK_MENU, 0, KEYEVENTF_KEYUP, 0);
keybd_event(VK_CONTROL,0,KEYEVENTF_KEYUP,0);

::PostMessage(hWnd,WM_KEYDOWN,VK_CONTROL,0);
::PostMessage(hWnd,WM_KEYDOWN,VK_MENU,0);
::PostMessage(hWnd,WM_KEYDOWN,'1',0);

::PostMessage(hWnd,WM_KEYUP,'1',0);
::PostMessage(hWnd,WM_KEYUP,VK_MENU,0);
::PostMessage(hWnd,WM_KEYUP,VK_CONTROL,0);

2、mouse event:

CString gameCaption="XXXXX";
HWND	hWnd=::FindWindow(NULL,gameCaption);
DWORD	dwPid;
RECT	rect;
POINT	ptOld;

::GetWindowThreadProcessId(hWnd,&dwPid);
::GetWindowRect(hWnd,&rect);

::GetCursorPos(&ptOld);
::SetCursorPos(80,150);

mouse_event(MOUSEEVENTF_LEFTDOWN,0,0,0,0);
mouse_event(MOUSEEVENTF_LEFTUP,0,0,0,0);

SetCursorPos(rect.left +200,rect.top +150);
mouse_event(MOUSEEVENTF_LEFTDOWN,0,0,0,0);
mouse_event(MOUSEEVENTF_LEFTUP,0,0,0,0);

CString gameCaption="XXXXX";
HWND	hWnd=::FindWindow(NULL,gameCaption);

::PostMessage(hWnd,WM_MOUSEMOVE, MK_LBUTTON, MAKELONG(80,130));
::PostMessage(hWnd,WM_LBUTTONDOWN,MK_LBUTTON,MAKELPARAM(80,130));   
::PostMessage(hWnd,WM_LBUTTONUP,MK_LBUTTON,MAKELPARAM(80,130));
Sleep(10);

more Information,please click here.
http://blog.csdn.net/wangningyu/archive/2009/12/13/4994295.aspx

Compressed image movement is too slow

Game-point25-Feb-10 19:25

Game-point

25-Feb-10 19:25

Hello Sirs,

The input image file size ~= 300MB tif..then i compressed that image up to 50 MB TIF using JPEG Compression ..when I pan 50 MB compressed image is too slow compared with original image size. please tell me why its slow ?

Please replay me !!

Failure is Success If we learn from it!!

Re: Compressed image movement is too slow

Stuart Dootson25-Feb-10 20:43

Stuart Dootson

25-Feb-10 20:43

How big is this immage? In pixels...Look at that and tell us if you can work out why it's slow....

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

CodeProject MVP for 2010 - who'd'a thunk it!

Re: Compressed image movement is too slow

Game-point25-Feb-10 21:41

Game-point

25-Feb-10 21:41

Thanks for your replay Sir ..

Actually in big size image movement is good as well as compared to compressed .....

Failure is Success If we learn from it!!

Re: Compressed image movement is too slow

Stuart Dootson25-Feb-10 21:44

Stuart Dootson

25-Feb-10 21:44

Are you decompressing the image in memory and panning that, or not?

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

CodeProject MVP for 2010 - who'd'a thunk it!

Re: Compressed image movement is too slow

Game-point25-Feb-10 22:18

Game-point

25-Feb-10 22:18

im not doing any decompressing the image ..just im using LZW and JPEG compression algorithm in image file ans then i saved into tif sir

Failure is Success If we learn from it!!

How to Get List of Function

Anubhava Dimri25-Feb-10 17:32

Anubhava Dimri

25-Feb-10 17:32

Hello Experts,

Actually i have a dll and Lib file but i don't know what is the function name for doing regarding operation. so i want to get the list of functions which are provided in functions.

So please help me.

Thanks

If you can think then I Can.

Re: How to Get List of Function

Cool_Dev25-Feb-10 18:02

Cool_Dev

25-Feb-10 18:02

use Dependency Walker http://dependencywalker.com/[^] or tools like Dll Export Viewer http://www.autohotkey.com/forum/topic8761.html[^].

Re: How to Get List of Function

Joshua Tully25-Feb-10 18:02

Joshua Tully

25-Feb-10 18:02

http://msdn.microsoft.com/en-us/magazine/ms809762.aspx[^] I would suggest you read that article and its predecessor, it contains an in-depth explanation and view of the PE file format and will cover the EAT (export address table).

DuplicatreHande question

ForNow25-Feb-10 15:32

ForNow

25-Feb-10 15:32

Hi

I am a little confused about how DuplicateHandle works

I am assuming this Function can be used for Interprocess communication

if so in Which process does this run the process wanting to aquire the handle

or the process that created the handle

Whichever is the case one of the objects ( the storage area or pointer to the storage area)

either target or source must be passed/sent to the other process

invoking the Duplicate handle

thankx

Re: DuplicatreHande question

Gwenio25-Feb-10 16:08

Gwenio

25-Feb-10 16:08

It can run in either process, though from what I have read on the function if it is called in a process other than the one aquiring the handle, you will need to use interprocess communication to pass the value (not sure why, if you have a pointer to where to store the handle). For this reason, I would say that it is better to call it in the process recieving the handle.

Yes, you would need to pass the pointer to the process with the handle, or the value of the handle to the process to recieve the handle.

Exporting a struct from a DLL

masnu25-Feb-10 9:57

masnu

25-Feb-10 9:57

Hi guys,

Is it possible to export a structure from a dll without including the header file where the structure is define? For example:

/*-------------------------
 mydllheader.h
------------------------------*/

extern "C" __declspec(dllexport) struct MyStruct
{

     MyStruct()
     {
         a = 0;
         b = 0;
     }

     int a;
     int b;

}

Instead of including mydllheader.h I want to do the following:

/*-------------------------
 myimportheader.h
------------------------------*/

extern "C" __declspec(dllimport) struct MyStruct

I would like to use myimportheader.h in my projects that use the dll that way I can hide my structure implementation from the user. Is that possible?

Thanks.

Re: Exporting a struct from a DLL

Richard MacCutchan25-Feb-10 10:26

Richard MacCutchan

25-Feb-10 10:26

You could do it this way but what is the point? If you hide everything from the user then what purpose is served by the structure? A better solution is to create a class that has methods but hides all variables and implementation details.

txtspeak is the realm of 9 year old children, not developers. Christian Graus

Re: Exporting a struct from a DLL

Avi Berger25-Feb-10 10:36

Avi Berger

25-Feb-10 10:36

Not if the user of your dll creates instances of MyStruct itself. It needs to be a complete type if the user of your DLL is to create instances of it.

If you delegate all creation/destruction of MyStruct instances to the dll, you can achieve something like this. I've seen this sort of thing done with void *'s for the interface. I don't know if you could do this with a pointer to an incomplete type. If not, you could get a sort of type safety by wrapping the void * in a struct of its own with the definition of that struct exposed to the consuming application.

Please do not read this signature.

Question on Dialog & ComboBox

Software200725-Feb-10 8:08

Software2007

25-Feb-10 8:08

I have the following crash which the debugger points to:

_AFXWIN_INLINE int CComboBox::AddString(LPCTSTR lpszString)
	{ ASSERT(::IsWindow(m_hWnd)); return (int)::SendMessage(m_hWnd, CB_ADDSTRING, 0, (LPARAM)lpszString); }

here is sample code:

Class B: public CDialog
{
CComboBox Box;
Box.AddString("xyz"); //This crashes

}

Class A: public CFormView
{
B pDlg(NULL); //launches Dialog B

}

Re: Question on Dialog & ComboBox

Maximilien25-Feb-10 8:13

Maximilien

25-Feb-10 8:13

You cannot "update" a control in a dialog before it's created.

so, all initialization must be done atleast after the OnInitDialog is called, and even in the OnInitDialog after the call to the base class OnInitDialog.

anyway, your code looks weird; are you certain that even compiles ?

Watched code never compiles.

Re: Question on Dialog & ComboBox

Software200725-Feb-10 8:18

Software2007

25-Feb-10 8:18

That isn't the exact code, was trying to show the problem without lots of code. I did figure it out, I was initializing before "UpdateData(FALSE)" in the OnInitDialog() function.

Thanks

Re: Question on Dialog & ComboBox

David Crow25-Feb-10 17:10

David Crow

25-Feb-10 17:10

Software2007 wrote:
I did figure it out, I was initializing before "UpdateData(FALSE)" in the OnInitDialog() function.

You're calling UpdateData() in OnInitDialog()? Confused | :confused:

"One man's wage rise is another man's price increase." - Harold Wilson

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Re: Question on Dialog & ComboBox

KingsGambit25-Feb-10 19:21

KingsGambit

25-Feb-10 19:21

Software2007 wrote:
CComboBox Box;
Box.AddString("xyz"); //This crashes

Here the Box object is not created or associated with a combobox. So, there no valid handle associated with the Box object.

Re: Question on Dialog & ComboBox

David Crow26-Feb-10 4:18

David Crow

26-Feb-10 4:18

An assertion is hardly the same as a crash. It's telling you the exact line and file that is problematic (hint: it's not in your call to AddString()).

Using Flashvars in MFC C++

lesliecasas25-Feb-10 7:36

lesliecasas

25-Feb-10 7:36

Hi, I am trying to pass Flashvars to send some parameters to a swf using Visual C++, I´ve tried using put_flashvars but it doesn´t work. I am using the videoPlayer.swf that is included in the Adobe Flash Development Server. Using HTML there´s no problem, but in C++ seems not to work.

m_FlashPlayer.put_FlashVars(L"&videoWidth=0&videoHeight=0&dsControl=manual&dsSen sitivity=100&DS_Status=true&streamType=vod&autoStart=true&serverURL=http:/vod/sa mple1.flv");
m_FlashPlayer.LoadMovie(0,L"D:\videoPlayer.swf");
m_FlashPlayer.Play();

I also tried to input the variables in the URL string.
m_FlashPlayer.LoadMovie(1,L"D:\videoPlayer.swf?&videoWidth=0&videoHeight=0&dsControl=manual&dsSensitivity=100&serverURL=rtmp%3A%2Fvod%2Fsample2&DS_Status=true&streamType=vod&autoStart=true");

I don´t know what else to do. I checked in the web but i couldn´t find anything similar. Please help...

Problem with owner-drawn list box

sashoalm25-Feb-10 6:30

sashoalm

25-Feb-10 6:30

I have a class derived from CListBox which is owner-drawn (I implement the DrawItem function). My problem is I use a white brush for the background, but when the list box is empty, its background is just gray. As soon as one item has been added, the background becomes white.

My drawing function is very simple:

void CNiceListBox::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct)
{
	CString txt = (const TCHAR*)lpDrawItemStruct->itemData;
	CDC dc;
	dc.Attach(lpDrawItemStruct->hDC);
	CRect r(lpDrawItemStruct->rcItem);
	dc.SetBkMode(TRANSPARENT);
	dc.SelectObject(m_font);
	dc.FillRect(&r, (lpDrawItemStruct->itemState & ODS_SELECTED ) ? &m_selectedBrush : &m_listBoxBackBrush);
	dc.DrawText(txt, txt.GetLength(), r, DT_VCENTER | DT_SINGLELINE | DT_LEFT);

	dc.Detach();
}

Where's the problem?

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