C / C++ / MFC

Tomasz Sowinski9-Mar-02 7:36

9-Mar-02 7:36

You may try this:
dst = src1 * alpha + (1 - alpha) * src2
alpha is a value from [0..1] range.

Tomasz Sowinski -- http://www.shooltz.com

Wizard_019-Mar-02 7:48

Wizard_01

9-Mar-02 7:48

THANKS for your prompt reply Smile | :)

What shall I use as dst and src1,2 ? (RGB,HSL,CMYK ...)

Could you suggest me some source code on the web ?

Thanks

Wiizi Smile | :)

Tomasz Sowinski9-Mar-02 7:45

9-Mar-02 7:45

You have to calculate this three times for R, G and B.

Tomasz Sowinski -- http://www.shooltz.com

Re: Why can't I toggle menu?

Wizard_019-Mar-02 8:13

Wizard_01

9-Mar-02 8:13

Thanks

Wiizi Smile | :)

Why can't I toggle menu?

Pony9-Mar-02 7:14

Pony

9-Mar-02 7:14

Hello,
Why can't I toggle menu? I have system tray menu that I want to toggle the 3rd menu item. But the problem is it doesn't toggle when I click it. Help me, please...

ON_COMMAND(ID_FLOAT, OnFloat)

void CMainFrame::OnFloat()
{
CMenu* mmenu = GetMenu();
CMenu* submenu = mmenu->GetSubMenu(2);
UINT state = submenu->GetMenuState(ID_FLOAT, MF_BYCOMMAND);

if (state & MF_CHECKED)
{
submenu->CheckMenuItem(ID_FLOAT, MF_UNCHECKED | MF_BYCOMMAND);
}
else
{
submenu->CheckMenuItem(ID_FLOAT, MF_CHECKED | MF_BYCOMMAND);
}
}

Thank you,
Blush | :O

Tomasz Sowinski9-Mar-02 7:32

Re: CTreeCtrl problems...

9-Mar-02 7:32

In MFC you're not using CheckMenuItem etc. Instead, you add special ON_UPDATE_COMMAND_UI handler which gets the CCmdUI object on input. One of the methods is SetCheck, which is all you need to have menu items checked.

Tomasz Sowinski -- http://www.shooltz.com

Why can't I toggle menu?

Pony9-Mar-02 7:14

Pony

9-Mar-02 7:14

CTreeCtrl problems...

Greven9-Mar-02 6:40

Greven

9-Mar-02 6:40

How can I get an existing CTreeCtrl to display the +- box to the left of the name? The reason I say existing is that I placed it on the form for the dialog box, and didn't explicitly call create. How do I modify the settings of it? Also, I attached a image list to the tree, but I can't get them to have transparent edges (around the image). I've tried attaching a mask, but it just won't do it. Obviously I am doing things I've never had to do before Smile | :)

This tree thing is driving me nuts...

Programming in binary is as easy as 01 10 11.

Nish Nishant9-Mar-02 6:57

Nish Nishant

9-Mar-02 6:57

TVS_HASBUTTONS and just to make it look better add TVS_HASLINES and also TVS_LINESATROOT

Nish

Bow wow wow,
Yippee yo yippee yay,
My miniputt high,
Is now 30 yay.

Re: CTreeCtrl problems...

Greven9-Mar-02 7:06

Greven

9-Mar-02 7:06

You are my hero for the day. I have been playing with this thing for hours Smile | :)

What about the images though? I have them in a CImageList, and I've tried using the GetImageInfo and adding a mask to IMAGEINFO::hbmMask variable, but it doesn't seem to do anything... Right now I've made my tree background black and my text white so I don't have to look at the black boarder around the images Smile | :)

And I just don't want to keep it that way...

Programming in binary is as easy as 01 10 11.

Re: CTreeCtrl problems...

Greven9-Mar-02 7:57

Greven

9-Mar-02 7:57

Never mind, I just solved my own problem Smile | :)

Actually, I solved it by reading a different post on a different problem! But it used a CImageList in there, and it works!!!!!!!!!
(I'm happy)

Programming in binary is as easy as 01 10 11.

MFC & WebServices

Gfw9-Mar-02 6:23

Gfw

9-Mar-02 6:23

Assuming Visual Studio 7, can anyone point me in a direction that would show me how to consume a .Net WebService in a C++/MFC desktop application. Sample code would be most helpful. Thanks in advance.

MFCIE 24bit toolbar

Jon Newman9-Mar-02 6:15

Jon Newman

9-Mar-02 6:15

I have a large button toolbar based on the MFCIE samples toolbar. However it only has a limited set of colours. how could i make it 24-bit colour like Winzip 8's toolbar?

.NET or not .NET? MFC is the question......

Re: MFCIE 24bit toolbar

Tomasz Sowinski9-Mar-02 7:41

VXD & address translation

9-Mar-02 7:41

Try this function:

void SetImageList(CToolBar &tb, UINT nMessage, UINT nIDBitmap)
{
	CImageList	imageList;
	CBitmap		bitmap;

	bitmap.LoadBitmap(nIDBitmap);
	BITMAP bm;
	bitmap.GetBitmap(&bm);
	imageList.Create(bm.bmHeight, bm.bmHeight, ILC_COLORDDB|ILC_MASK, 0, 1);
	imageList.Add(&bitmap, RGB(255,0,255));
	tb.SendMessage(nMessage, 0, (LPARAM)imageList.m_hImageList);
	imageList.Detach();
	bitmap.Detach();
}

You call it like this:

SetImageList(yourToolbar, TB_SETIMAGELIST, nNormalBitmapID);
SetImageList(yourToolbar, TB_SETHOTIMAGELIST, nHotBitmapID);

Tomasz Sowinski -- http://www.shooltz.com

9-Mar-02 5:45

Hi I need to do raw harddisk access under 98/Me. The information I've seen tells me that the only way to this (If I don't want to make one 32-bit and one 16-bit dll) is to write a VXD.

VXD:s run in 16-bit mode, doesn't they? I belive that windows does some kind of memory translation when parameters are passed via DeviceIOControl. Is that correct?

But say that I want to read 5 sectors. I must then pass at least 2 parameters, but DeviceIOControl allows only one. I must therefore send a pointer to a struct, say

struct READINFO
{
DWORD nSectors;
char *pBuf;
};

But then the buffer pointer will be incorrect, doesnt it? How can I fix that?

Proxy Stub

Peter Liddle9-Mar-02 5:48

Peter Liddle

9-Mar-02 5:48

Hey Guys

what are the advantages behind merging the proxy and the stub in a dll file and is there any need to enable MTS. In other words what do this features allow you to do i can't do in a standard dll with MFC support.

Peter

Re: Proxy Stub

soptest9-Mar-02 13:30

soptest

9-Mar-02 13:30

COM has nothing to do with MFC at all.
Proxy and stub also has nothing to do with MTS.
When COM marshals and unmarshals interface it uses proxy and stub of that interface. So if proxy/stub is merged with your COM object that means no one can use it but owner.

soptest

MFC worker thread and message Queues

Kevin Behilo9-Mar-02 5:31

9-Mar-02 5:31

Hi,

When I’m not using MFC and starting worker threads with _beginthreadex
I can give them message queues by calling:

PeekMessage(&msg, NULL, 0, 0, PM_NOREMOVE);

and then later on in the thread use GetMessage. I can do this without a window which is pretty cool. I tried putting PeekMessage into the ThreadFunc of a CWinThread derived class but it fails and, of course, the later call to GetMessage causes the program to hang.

Before I start pounding my head against the wall I figured I would ask here to see if anybody would know why this would fail and if it is possible to workaround (without creating a window and using a UI thread).

Thanks,
-Kevin

Tim Smith9-Mar-02 5:55

Tim Smith

9-Mar-02 5:55

GetMessage will hang if you don't have a message waiting. Are you using PostThreadMessage to post a message to that thread?

If so, make sure you are doing that properly.

Tim Smith

I know what you're thinking punk, you're thinking did he spell check this document? Well, to tell you the truth I kinda forgot myself in all this excitement. But being this here's CodeProject, the most powerful forums in the world and would blow your head clean off, you've got to ask yourself one question, Do I feel lucky? Well do ya punk?

Kevin Behilo9-Mar-02 6:06

9-Mar-02 6:06

Tim,

I’ve been writing server apps w/o a GUI so bear with me on my next question. Why would the GUI hang if a message queue has been created on an independent worker thread? I’m beginning to believe that a queue has not been created because the call to PeekMessage returns FALSE.

-Kevin

Kevin Behilo9-Mar-02 6:34

9-Mar-02 6:34

I figured out why the GUI was hanging. A mistake not related to the Message Queue. But I still can't get the Message Q to work. Is there any reason why the scheme in my first post would not work?

Is the thread ID that I get from the CWinThread valid to use in:
PostThreadMessage(pThread->m_nThreadID, 1,1,1);

Confused | :confused:

Thanks,
Kevin

Tim Smith9-Mar-02 8:39

Tim Smith

9-Mar-02 8:39

Without more example code, I have no idea.

Tim Smith

I know what you're thinking punk, you're thinking did he spell check this document? Well, to tell you the truth I kinda forgot myself in all this excitement. But being this here's CodeProject, the most powerful forums in the world and would blow your head clean off, you've got to ask yourself one question, Do I feel lucky? Well do ya punk?

Kevin Behilo10-Mar-02 5:14