Why can’t I …

MFC Radio Button: When working with more than one groups of MFC Radio buttons in the same window:

  1. Sequence: of the radio buttons: for each radio button group, make sure the buttons are in sequence.
    1. Tabbing order of control elements: when in MFC resource editor type ctrl-D to toggle the tabbing order of GUI elements. This is the ordering, or when you type <tab> to advance to the next GUI element, you will observe focus changing in this order.
    2. Changing the sequencing: with the <tab> sequencing order visible, you can change the ordering by clicking on the numbers.
    3. MAKE SURE radio buttons in a group have tabbing numbers in sequence.
    4. Remember the first radio button (with smaller number) of each group. You want to make sure only the first radio button of each group has the group-property set to true.
  2. Grouping: type another ctrl-D to switch off the tabbing sequence.  For each group of radio buttons, right-mouse-button click on the first radio button and bring up the property sheet. Look for the “Group” property and make sure it is set to true. Now make sure all “non-first radio buttons” have their “Group” property set to false. Now you can type ctrl-T to try out your radio buttons. It should work now.
  3. Initialization: don’t forget to initialize your radio buttons by calling CheckRadioButton() for each radio-button-group in OnInitDialog().

 

 

GetCheckedRadiuButton(symbol_A, symbol_B): if you call this function to determine which if the radio button is click, you should:

  1. Look at Resource.h (edit this file)
  2. Look for "symbol_A" and "symbol_B" in the Resource.h file
  3. Look at the numbers that these symbols are defined: Make sure
    1. symbol_A and symbol_B corresponds to the first and last of your radio
    2. make sure all radio buttons in the group have _CONSECUTIVE_ numbers (you can hand-edit this, just make sure you use unique numbers)

For example:  I have radio button, b1, b2, b3, b4 on my GUI, and  in resource.h I have ...

#define IDC_B1   1012

#define IDC_B2   1110

#define IDC_B3   1013

#define IDC_B4   1000

Notice IDC_B1 does not have the smallest number, and notice the numbers are not in any consecutive ordering, so I would type modify the above to make sure:

  1. b1 has the smallest number in the group
  2. b1,b2,b3,b4 are consecutive numbers
  3. all numbers are unique, for example, I may do the following editing:

#define IDC_B1  9000

#define IDC_B2  9001

#define IDC_B3  9002

#define IDC_B4  9003

Now when I call: GetCheckedRadiuButton(IDC_B1, IDC_B4), I will be ok. (The above ctrl-D, should do the trick, but sometimes it may fail, and you have to do all these by hand).

 

Linking With MFC library generates tons of error:

  1. MFC with DLL: The MFC library (and ALL of our tutorials) are build to run with DLLs
  2. Your code: must also be compiled with the MFC DLL option, here is how:
    1. Set your “Configuration”  to “Debug”
    2. In the solution view, RMB to call up the property sheet of your project
    3. Under General: Use of MFC: make sure you select “Use of MFC in a Shared DLL”
    4. Open up the “C++” tab, under “Code Generation”
    5. “Runtime Library”: make sure you select “Multi-threaded Debug DLL”
    6. Now set your “Configuration” to “Release” and repeat the above steps.

 

D3D Performance:

I have a really fancy graphics card, why does my DX program runs so slowly? Do this:

§        Go to your Control Panel

§        Find the DirectX property page

§        Go to the Direct3D tab

·        Under Debug/Retail D3D Runtime – select Use Retail Version of Direct3D

 

Compile/Link DX programs:

Your directory search path may be incomplete or wrong. In your development environment, (on VC.net) do this:

§        Tools ->Options

§        Under the Project folder

§        VC++ Directories

·        “Show directories for”: Include files
add in “C:\DX_PATH\include” or wherever you have installed you DXSDK. Make sure this path comes before any of the existing paths. What are we doing here?

·        “Show directories for” - Library files
add in “C:\DX_PATH\Lib” or wherever you have installed you DXSDK. Once again, make sure this path comes before any of the existing paths. What are we doing here?

DX_PATH – depending on your DX version and your exact installation, this path is usually under:

               C:\Program Files\Microsoft DirectX _SOME_VERSION_NUM\

Please come talk to me (of ask in class) if you do not understand what I am talking here. If you do, good! Make doubly sure you understand exactly what the above is doing. I think I will ask a system type question in the mid term exam J