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MFC won't die. It may not be used for new projects and may not be developed futher, but it won't die. There are too many legacy projects that depend on it, and it's just too expensive to convert them to something else. Even COBOL and FORTRAN are still used extensively.
Ryan
Being little and getting pushed around by big guys all my life I guess I compensate by pushing electrons and holes around. What a bully I am, but I do enjoy making subatomic particles hop at my bidding - Roger Wright (2nd April 2003, The Lounge)
Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late - John Nichol "Point Of Impact"
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I've been looking into DirectX lately, more specifically Directdraw (even though technically speaking that doesn't exist anymore), because i wanted to sort of mimic the GUI of a certain game. This game has a menu on startup which is built up out of several bitmaps, all placed neatly together so they form one image. Then there is the menu on it which is formed by just drawing over the main image, rectangles that contain the text for the menuitem, so the menuitems must have a background to match the main screen. When you move your mouse over one of these items, the bitmap can change so the text appears to highlight or whatever. Now i have two questions:
1) Why did they break appart the main background image in several pieces? I mean, what reason could there be? Why didn't they just make the background image one large bitmap and then just draw the menu over it, so they wouldn't have to assemble the pieces of the background image first?
2) When you put the pieces of the background image together, you get an image of 640 by 480 pixels. Now, in the game you can switch resolutions, for example to 1024*768. So this would mean the bitmap would get stretched, how do you do this in DirectX? Is there a function, or do you have to write your own function to calculate how many pixels will be representing one pixel now?
Thank you for your help.
P.S.: i do have a theory for the first: The measurements of the pieces can all be divided by 16,32,64 or whatever, basically most pieces (also for game textures) are either 32*32,64*64,128*128,128*256,256*256 so maybe they just wrote a function that only handles certain dimensions of bitmaps like PaintBM256by256(). But i would think it would be easy to detect the size...
Kuniva
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Kuniva wrote:
Why did they break appart the main background image in several pieces? I mean, what reason could there be?
I'm not familiar enough with DirectDraw to be certain, but if the app is (or was planning to) use 3D acceleration for the 2D parts, then the author was just making sure that the image pieces will play nice with video card capabilities, particularly older cards. For example, the Voodoo 3 doesn't support texture sizes larger than 256x256.
- Mike
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ah thanks! thats probably it really, the game is pretty old already 
Kuniva
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Harumph. i've got a bit of code here that is suposed to read data from a text file, and based on the value of 'default_val' its supposed to make the string in my combobox display that is linked to a number.
ie, if default_val = 0, then the first string displays, 1 the 2nd string, etc
here's my code:
<br />
combovectorread( strings, var_nums, pointer, default_val);<br />
<br />
DDX_Control(pDX, IDC_INPUT_TQ, input_tq);<br />
input_tq.SetCurSel(default_val);<br />
<br />
<br />
for(int i = 0; i <= var_nums; i++)<br />
{<br />
input_tq.AddString(strings.at(i).c_str());<br />
}<br />
<br />
<br />
combovectorwrite(pointer, default_val);
here's what everything does: combovectorread() gets a vector fo strings (contents of the listbox), default_val is the number of the string i want to be default in the combobox. input_tq is my CComboBox object. combovectorwrite() outputs the value of default_val to teh text file.
Now, everything works fine when a user changes the selected string in the combo box. if they select, say, string 3, and move to another tab in the propertysheet, string3 remains selected. however, if they close the program and reload it, its back to the origional.
any suggestions? i know the input/output work properly, i've tested them and output to teh screen. I think my main question is finding where in the source code i need to have a GetCurSel(). I tried putting it before the combovectorwrite() and setting default_value to it, but it always sets default_val = -1. even if the 3rd string is selected.
*.*
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I do not know if the code snippet you've provided is in any particular order or not, but you're gonna want to call input_tq.SetCurSel() after loading the combobox with input_tq.AddString().
keegan wrote:
I think my main question is finding where in the source code i need to have a GetCurSel().
When the dialog is being dismissed.
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ok, i've modified my code. i only have one teeny tiny little bug. Say a user selects the 3rd option in a combo box. if the user goes to another page in the property sheet, the 3rd option remain selected. if a user closes the dialogbox, and reopens it, the 3rd option remains selected.
however, if the user closes the program, and loads the dialog box back up, the first option is selected. now here's the punch line: if the user moves to another tab in the propertysheet, then goes back to the one with the combo box, the 3rd option will be selected again.
funky, eh? its only when the propertysheet is first opened the fuirst time the app is launched does the first option appear selected. I've for input_tq.SetCurSel() functions up the wazoo, all over my program.
any ideas?
(and if i look in the text file where the values are stored, the value for the 3rd option is there, not the 1st. its wierd.)
*.*
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What you need to remember is that in a property sheet, the actual page window is not created until that tab is selected for the first time. Could this have some impact on your issue?
onwards and upwards...
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i'll bet thats it. i tried putting setcursel() right before my domodal, but the linker didnt like that. and since i dont use oninitdialog...
bleh, its friday, ill be back opn monday.
Edit: Why does an edit control show saved data the first time the page is displayed, but a combobox doesn't?
*.*
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keegan wrote:
i tried putting setcursel() right before my domodal, but the linker didnt like that.
The linker couldn't care less in what order you've called a set of functions. But, given that the dialog window, nor any of its controls, exist prior to calling DoModal(), the call to SetCurSel() would indeed cause an assertion to fire.
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ok, so if it goes ebfore the page is displayed, and after its created, where does it go? :-/
*.*
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Well, the initialization code can either go in OnSetActive(), or since it is derived from CDialog, the code can also go in OnInitDialog().
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How can I stop a program from running if the escape key was hit.
Can I set it up so I can choose what key stops the program ie. "8 key"
thanks,
sj
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if you're at a point in the program where a user can go a few ways, ie stop the program, continue, do this, do that, you can use _getch() and make a switch statement off what key the input. i dunno if thats what you want, if it is, i can post an example how to do it.
meh, ill post an example anyway
<br />
int c;<br />
c = _getch()<br />
switch (c)<br />
{<br />
case 0x1b
return 0;<br />
break;<br />
<br />
case 0x38
[...].br />
break<br />
}<br />
i used that code in a program that asked a user to hit escape to terminate the program or space to continue. it works
PS. you need <conio.h> to use _getch()
*.*
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where can I find a list of the hex values for each key?
sj
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http://www.asciitable.com/
Hx is the collumn you want, the key is in red
*.*
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welcome 
*.*
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I have written a DLL which has a function defined as:
DllExport double getDouble( const char * );
In a C# class I have linked to the DLL as follows:
[DllImport( "CurrConv.dll", CharSet = CharSet.Ansi )]<br />
protected static extern double getDouble( IntPtr m_ptrDataBuffer );
The problem I am getting is that when I get to the line:
double number = getDouble( m_ptrDataBuffer );
I get the following error:
"Unable to find an entry point named getDouble in DLL CurrConv.dll"
Can someone please explain where I am going wrong, and how to resolve the problem.
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The crux of the problem is likely in the C declaration of the function. This determines how the function name is exported.
I'd try:
extern "C" __declspec(dllexport) double getDouble( const char * );
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<br />
Peter Weyzen<br />
Staff Engineer<br />
Santa Cruz Networks
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I construct a propery page which I added OnActive() and OnKillActive() by class wizard. When I added OnNotify() to the class, I have not received message to trigger OnActive() and OnKillActive() anymore. Is there anyway to both functions triggered even I use OnNotify()?
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What messages does the program process in OnNotify()? I suspect that the message gets destroy inside OnNotify().
Kuphryn
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All I did is I tried to detect right mouse click on richedit control located on my property page. It shoudn't intercept both OnSetActive() and OnKillActive() messages. Please let me know if I did something wrong here.
BOOL CPropertyPage::OnNotify(WPARAM wParam, LPARAM lParam, LRESULT* pResult)
{
MSGFILTER * lpMsgFilter = (MSGFILTER *)lParam;
if ((wParam == IDC_RICHEDIT1) &&
(lpMsgFilter->nmhdr.code == EN_MSGFILTER)&&
(lpMsgFilter->msg == WM_RBUTTONDOWN))
{
.
.
.
.
}
return CDialog::OnNotify(wParam, lParam, pResult);
}
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Relative C++ and especially VC++ and working with Windows newbie (most previous experience is embedded).
Here's the scenario:
Here's what I want: one class called MonitorClass, and this class should instantiate a bunch of specific montitors underneat underneath it.... monitor1, monitor2, monitor3, etc.....
The "system" will start up the Monitor class which runs in a loop all the time monitoring each specific monitor underneath.
We also have seperate tests that will come into existence that may need to monitor some of the same things....so these tests should go through the MonitorClass to get a Sample() from any specific monitor.
Since we want all to go through the same guy...I'm thinking we want MonitorClass in a DLL (I've never played with DLLs much) so that it is in memory only one time and all go through him.
Can I make a DLL that is essentially a class ? Or must it be nothing more than a collection of functions?
Or...can you understand the problem enough to give a better solution?
There are only 10 types of people in this world....those that understand binary, and those that do not.
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What are you going to do with the results of the sampling/monitoring? If it is just going to be logged somewhere (file/db), and you always need this running, you may want to consider developing this as a service.
onwards and upwards...
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