C / C++ / MFC

Re: CE C++ - list control color and font problems

7-Jun-07 6:25

Hi...

Here's another CE C++ question....

I have a list control. Items are listed in bolded red as added to the control. Once a user had addressed an item, I would like to change the text of that one item to unbolded black.

In CE C++ I can find a way to change the color of all items in the list control.

I cannot find a way to bold/unbold the text for only one line of the control list.

I also cannot find a way to change the font of the text for only one line of the control list.

Can any of this be done in Window CE C++? If it can be done how... any hint would be greatly appreciated.

Matthew Faithfull7-Jun-07 7:42

Matthew Faithfull

7-Jun-07 7:42

Because the normal drawing code for list controls doesn't draw each item in a different colour you can't use the same sort of method as for the static text control. i.e. set the font, let it draw, reset the font. You need to intercept the drawing of each individual item in the list and decide whether you want it in one colour or the other.
As you're going to have to store per-item data for this anyway you might as well hold onto all the list data yourself and make it a virtual list control. There are a number of keywords you need to look for in MSDN, 'virtual list control', 'Owner Draw' and 'Custom Draw'.
I would start with Custom drawing as you probably don't want to do all the painting of the list control yourself.
Custom drawing is when the MFC control calls your functions to do parts of the painting, e.g. background or border or list item but does the rest itself.
Owner draw is where you do all the painting of the control, this is fun if you want to do something simple but list controls are not really that simple to paint.
A 'Virtual ListCtrl' is where MFC calls your functions to get each data item as it draws the list. this lets you supply the text but not the font as MFC doesn't expect it to change Smile | :)

You might be able to cheat by finding the DC for the control each time it calls you for an item and setting the font but that is bad hacking Dead | X|

In fact I didn't even suggest that Wink | ;)

Nothing is exactly what it seems but everything with seems can be unpicked.

CE C++ - static text font and size how to [modified]

LaCoder7-Jun-07 6:15

7-Jun-07 6:15

Hi,

I would like to change the font and size of text in static text...

I have been able to change color. here are the command lines I use to do that.
pDC->SetBkMode(TRANSPARENT);
pDC->SetTextColor(RGB(0, 0, 255));//blue

But have not found a say to set the font or font size. Is it possible to set the font size and color for a static text control in MS CE C++ (v4.0)? If it is can anyone give me a hint of how to do this?

Thanks

-- modified at 12:27 Thursday 7th June, 2007

Matthew Faithfull7-Jun-07 6:33

Matthew Faithfull

7-Jun-07 6:33

Two steps are needed. First you need a font, or in the case of MFC a CFont. Then you need to select that font into the DeviceContext you already have a pointer to, pDC, before the static gets drawn. I guess in the same place as you put SetTextColor, the WM_PAINT handler.
I Can't remember off the top of my head whether you call a function on the DC pDC->SelectObject(myFont) or if you can do it the other way around myFont.Select(pDC) but you'll figure that out in no time.
Remember to record the previously selected Font which will get returned when you do the SelectObject and re-select that one back into your DC after you've finished painting or you might screw up the next guys control by drawing it with your font OMG | :OMG:

Nothing is exactly what it seems but everything with seems can be unpicked.

LaCoder7-Jun-07 6:50

7-Jun-07 6:50

Thanks for your quick reply. Between you response and the one from Anurag Gandhi think I have the changing to static text fonts handled.

As you suggested I have a lot of studying to do on these topics. I've been developing in the UNIX/LINUX environments for years. Now they throw a an MS CE C++ project on me and want it done yesterday!!!! Laugh | :laugh:

I welcome the chance to learn but it’s a challenge.

Thanks!!

Anurag Gandhi7-Jun-07 6:35

Anurag Gandhi

7-Jun-07 6:35

To change the font face, size, weight and other properties, Create a new font and attach it with your Device context.
use following code:
CFont font;
font.CreateFont(20,0,0,0,200,0,0,0,0,0,0,0,0,_T("Times New Roman"));
pDC->SelectObject(&font);

//First parameter is Height and 2nd is width. when 0 is passed, it takes proportionate height or width.
Now you will be able to change the font size. I will suggest read more about fonts in VC++ from any tutorial.

Anurag Gandhi.

LaCoder7-Jun-07 6:53

Re: Variable Resource Ids

7-Jun-07 6:53

Wow thanks Anurag Gandhi. I added your suggestion to by code and it ran just great!!!

As you suggested I have a lot of studying to do on these topics. I've been developing in the UNIX/LINUX environments for years. Now they throw a an MS CE C++ project on me and want it done yesterday!!!! Laugh | :laugh:

I welcome the chance to learn but it’s a challenge.

Thanks!!

Variable Resource Ids

maberry7-Jun-07 6:05

maberry

7-Jun-07 6:05

I have a bunch of button resources that I want to set to be visible depending on certain criteria.
Here is a sample of the code I have:

for(i=0; i<number of sub entities; i++)
{
//for check button
pBtn=GetDlgItem(IDC_STRIPVIEW_DEVICE_1_CHECK_BTN);
pBtn->ShowWindow(SW_SHOWNORMAL);
}

I to be able to have the number in the IDC identifier change correspond to i.
How do I get the number in the IDC to be variable. Or how can I make MFC
treat a string as a resource id?

Thanks

Adam

Mark Salsbery7-Jun-07 6:50

Mark Salsbery

7-Jun-07 6:50

Can you make the IDs consecutive and use i as an offset from the first ID?

Mark

"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

Re: Variable Resource Ids

maberry7-Jun-07 7:59

maberry

7-Jun-07 7:59

I don't think I would be able to do that, but I can make a CString that says, for example IDC_STRIPVIEW_DEVICE_3_CHECK_BTN when i=3, but all I need to know how to do is pass that to string to the GetDlgItem function and have it accept it as an unsigned integer resource id.

Adam

Re: Variable Resource Ids

Mark Salsbery7-Jun-07 8:13

Mark Salsbery

7-Jun-07 8:13

GetDlgItem expects an integer ID. You could map indexes to an array of strings but that just
adds an unnecessary level of indirection since you'd need to convert that string back to an int
to call GetDlgItem. So, you might as well use i to index an array of actual control IDs
(integers).

That brings me back to what I was thinking...

#define IDC_BUTTON1      1000
#define IDC_BUTTON2      1001
#define IDC_BUTTON3      1002
#define IDC_BUTTON4      1003
#define IDC_BUTTON5      1004
#define IDC_BUTTON6      1005
...
 
for(i=0; i<number of sub entities; i++)
{
    //for check button 
    pBtn=GetDlgItem(i + BUTTON1);
    pBtn->ShowWindow(SW_SHOWNORMAL);
}

 -or-

for(i=IDC_BUTTON1; i<IDC_BUTTON6; i++)
{
    //for check button 
    pBtn=GetDlgItem(i);
    pBtn->ShowWindow(SW_SHOWNORMAL);
}

"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

LoadLibrary(Ex) and SetErrorMode problem

Nitrogenycs7-Jun-07 5:59

Nitrogenycs

7-Jun-07 5:59

Hello,

Suppose I have a dll called MyDLL.dll which is statically linked to External.dll . Now I load MyDLL.dll from my application like this:

handle = LoadLibrary("MyDLL.dll");

Now, if MyDLL.dll and External.dll are present everything works just fine and LoadLibrary succeeds (i.e. handle != 0).
When I delete External.dll, then I get this behaviour:

a) In debug mode an error message box pops up saying that External.dll was not found.
b) In release mode I don't get this error message box. handle is simply 0. So I call GetLastError() along with FormatMessage() and get an error code of 126 (specified module not found).

Ideally, I'd like to suppress the message box in a) and get its message string so I can write a more detailed description of the problem into the log. I thought GetLastError() and FormatMessage() would take care of this, but apparently they only return some hardcoded standard messages.
So my primary question is whether there is a way to get this message string somehow?

If there is no way to get the message string, I'd like b) to always display the error message box. According to the MSDN docs ( http://msdn2.microsoft.com/en-us/library/ms680621.aspx ) I need to call something like SetErrorMode(0) ( maybe something like SetErrorMode( SetErrorMode(0) | ~SEM_FAILCRITICALERRORS) ).
This call does not seem to have any effect. The current error mode is 4 ( == SEM_NOALIGNMENTFAULTEXCEPT), but the error message box still does not pop up, it keeps failing silently (handle == 0).

Can somebody help me?

bob169727-Jun-07 7:58

bob16972

7-Jun-07 7:58

Nitrogenycs wrote:
I thought GetLastError() and FormatMessage() would take care of this, but apparently they only return some hardcoded standard messages.
So my primary question is whether there is a way to get this message string somehow?

If FormatMessage gives you the error string, then I am confused on what other message string you desire to obtain?

Nitrogenycs7-Jun-07 8:36

Nitrogenycs

7-Jun-07 8:36

FormatMessage just gives me the error string relating to the error code 126. This is some general message like "Could not find the specified module".
The message box that's popped up shows a more detailed description of the problem, including the name of the missing dll, in this example "External.dll". This is what I really need in order to find the cause of the problem. Sometimes a user misses specific dlls (for example I forgot to include them in the package) or did not have the necessary prerequisites installed.

bob169727-Jun-07 9:24

bob16972

7-Jun-07 9:24

Why not just concatenate the string your using for LoadLibrary to the end of the generic message to form your own custom message that tells them exactly which dll they are missing?