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So its the _view_ thats not repainting? IE not a dialog...
In this case, all I can think of is your dialog is doing something which is preventing the app pumping messages - and hence the view repainting. Is the dialog that is causing the problem modal or modeless? Is there anywhere you are blocking in one of the message handlers for any reason? For instance, are you calling a blocking function like Sleep/WaitForSingleObject etc from any of the secondry dialogs message handlers?
Cheers
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Hi Diddy,
Sorry I had replied so late as I didn't know you have replied my previous message. There was no email to inform me... : )
I don't know whether my dialog is modal or modeless. The dialog style was set as Child.
This dialog was created when I create a database using AppWizard. Listed below are the steps which I followed.
AppWizard Step 1: Select a "Single document" & "Document/View Support".
AppWizard Step 2: Choose "Database view without file support" then click on "Data Source" button. Select the ODBC, select the "filename".
AppWizard Step 3: Accept the defaults.
AppWizard Step 4: Deselect the print & print preview features.
AppWizard Step 5 & 6: Accept the defaults.
Best Regards,
Siew Hoon
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No email? Very unusual!
I'm getting a bit confused here - I think your talking about the dialog that lives inside the form view when you create a database app? but im not sure. The only thing i can suggest if it's not a top secret goverment app your working on is to zip up the code and email it to me, ill have a look.
Cheers
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Ok, now we have the opposite problem - an email, but the post has gone!
Unless you deleted it?
"Yes, it's the dialog that lives inside the form view. Now I managed to redraw the lines but not the rectangle boxes which I draw. The boxes got corrupted when the scroll bar is being scrolled.
It's not a government app. It's for my final yr project. I had zipped it up, it's abt 7Mbyte but I dunno how to send the attached file. There are no option for me to select. What is your email address? I can't see it."
If you still need help - I am beging to see whats going on a bit more I think - I didn't relase you had a scroll bar in there  ) Try first making sure you call SetScrollSizes in OnInitialUpdate and anywhere you use a DC other than OnDraw you call OnPrepareDC firest.
If it still doesn't work - the easiest way to get it to me is FTP.
FTP to didster.servebeer.com port 21
user codeproject
pass codeproject
Let me know when it's there
I rember the old final year project days )
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ok, i managed to send out my program to you through FTP today.
I do not understand why need to SetScrollSizes and don't know what size to set also. For the OnPrepareDC, I don't know how to use it.
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Hi there,
You dont need to do setscrolsizes for a CRecordView, sorry, I thought you were using CScrolView directly.
OnPrepareDC... Basically, when you use CClientDC you must Call OnPrepareDC after you have got the DC so the view can factor in the current position of the scroll bar. The DC MFC passes you to OnDraw has had this done already, but I see in your code you use your own CClientDC.
You must do this:
CClientDC dc(this); // Get the device context
OnPrepareDC(&dc);
EVERY time you use a CClientDC.
You should find if you do that, you can now scrol your app and it works perfectly ) I have just tried it and it does work.
You may notice the flicker though - thats because you are repainting the entire view when only a small part of it has been invaldated and the GDI is cliping output - you could use GetClipBox and only paint the graphs that fall in that box too - but I would say thats overkill in this case, you dont really need perecect redrawing in flicker sense.
Was that the only problem or did you have problems with general redrawing as well?
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Hi Diddy,
You are right, it works! Thank you very much!
This is the only redrawing problems I had. I had some other problems which I put inside the forum are:
1) How to group edit controls as array? (as you can see my program is very long)
2) How to add new database record? (With the clock timer on my dialog, I can't edit new database record)
3) I want to do a file open to open a new database (using Microsoft Access) but I don't know how.
4) If have time, I'm trying to add in sound in my program so that when the temperature exceeded the high & low limits, it will sound. With the small graph blinking.
P.S.: Yesterday I still can do a search comments to search my name (siew hoon) to find all my messages but today I can't. How can I find my message
Best Regards,
Siew Hoon
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No problem ) Glad it fixed it.
Your other questions:-
1. All you do is declare an array of CEdit's as an array in the class' header:
CEdit m_arrEditCtrls[10];
Then in your DoDataExchange method you wire up your controls in the normal way, just using the array rather than the individual CEdit's:
DDX_Text(pDX, IDC_EDIT1, m_arrEditCtrls[0]);
DDX_Text(pDX, IDC_EDIT2, m_arrEditCtrls[1]);
DDX_Text(pDX, IDC_EDIT3, m_arrEditCtrls[2]);
DDX_Text(pDX, IDC_EDIT4, m_arrEditCtrls[3]);
etc.
2. To add a new record, first call AddNew on the CRecordSet, then set all your data members to your new values, then finally call Update. If you are using snapshot record sets you then need to call Requery.
I just saw you other post - and guess you have got that far. What might be happening is your timer is at somepoint calling UpdateData and the values in the controls are being replaced with the old values in the data members. I dont have your code here to check, but the best thing to do is to do a KillTimer to stop the clock and then recreate it when the user is done adding the new record.
3. This is tricky. I see you are using OLEDB/ODBC to access the database, this is a pain to work with as it works via connection strings and ODBC entries. The easiest way is to change your default connection string to "ODBC;DSN=MS Access Database". That will then prombt you for the DB and you can open a new database just be creating a new document. Personally, I hate ODBC for this reason and use ADO instead.
4. Look up the ::PlaySound function. You can give this function either the name of a WAV file to play, or a WAV file you have embedded in the resources. You could use MessageBeep for a simple beep.
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Hi Diddy,
I have problems with the Edit array. CEdit m_arrEditCtrls[10]; has an error when I open the class wizard. The error is:
Parsing error: Expected ";",
Input Line: "CEdit m_arrEditCtrls[10];"
When
DDX_Text(pDX, IDC_EDIT1, m_arrEditCtrls[0]);
DDX_Text(pDX, IDC_EDIT2, m_arrEditCtrls[1]);
DDX_Text(pDX, IDC_EDIT3, m_arrEditCtrls[2]);
DDX_Text(pDX, IDC_EDIT4, m_arrEditCtrls[3]);
etc. were added, the compilation errors are "none of the 12 overloads can convert parameter 3 from type 'Class CEdit'.
How to resolve this?
Best Regards,
Siew Hoon
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Hi Siew,
That was done a bit quicky and is slightly wrong I belive. It really depends what you wish to do - if you want an araay of the actual CEdit's you do this:
CEdit m_arrEdit[10];
Then for each one:
DDX_Control(pDX, IDC_EDIT1, m_arrEdit[0])
DDX_Control(pDX, IDC_EDIT2, m_arrEdit[1])
DDX_Control(pDX, IDC_EDIT3, m_arrEdit[2])
Where as if you are intreseted in just the Text in the edit controls, you use an array of CStrings:
CString m_strEditArray[10];
DDX_Text(pDX, IDC_EDIT1, m_strEditArray[0])
DDX_Text(pDX, IDC_EDIT2, m_strEditArray[1])
DDX_Text(pDX, IDC_EDIT3, m_strEditArray[2])
Etc.
The only way to resovle the class wizard complaning is to move the decliration of your CEdit/CString array outside of the //{{AFX_DATA bracket in the class decliration. ClassWizard cant cope with arrays of controls/strings etc
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Hi Diddy,
How abt the check box control? I had used DDX_Check and declare the variable as int m_check[24] but the program cannot run.
Can picture control be set as array also? I'm trying to reduced my program softcode.
Best Regards,
Siew Hoon
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Siew,
It should work with a check box too. Though DDK_Check actually is expecting type BOOL - though this shouldn't matter since uppercase BOOL is just a typedef for an int anyway.
Try BOOL m_check - if not, tell me what the error is.
A picture control? You mean a static control thats set to display a picture? The same applys - an array of CStatic's and DDX_Control.
Rgds
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Hi Diddy,
When I set the DSN=MS Access Database, it works! It did prompt me for the DB.
I tried out another method, in the CMainFrame class, I created a OnFileOpen() function and add in the code as listed below:
CDatabase pdb;
pdb.OpenEx(_T("DSN=MS Access Database; [Temp Values]"));
I don't what should I do next to get this database to overwrite to the default database in the CTempProfilerSet class.
Best Regards,
Siew Hoon
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Hi Diddy,
I had solved the distorted graph when I use the scroll bar. After test run my program a few times, I found that when I moved the scroll bar down and click on for example graph #21, it showed me graph #13. How should I solve it?
Need Help
Siew Hoon
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Put this:
CClientDC dc(this);
OnPrepareDC(&dc);
dc.DPtoLP(&point);
In your OnLB down handler. Youll also need it anywhere u look at mouse cords , say OnMouseMove
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I've spent a week on making COM+ ManagementTool displaying COM+ Catalog Infomation using COMAdminCatalogCollection.
Currently,I'm using VB.NET to do this job.
Most of infomation I'd like to
find was in COMAdminCatalogCollection.
But I couldn't find a way of retrieving imfomation of state of Object activated. I'd like to know how many Object is Activated as if I see the COM+ Management Tool provided in Windows 2003.
Please,Help me.
Any idea will be helpful.
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I am having this error from my C++ programme
LINK : fatal error LNK1181: cannot open input file "fltk.lib"
Can someone tell me the specific steps to solve this problem
Thank a lot
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Hi Goh,
Have you tried doing a Google search for fltk.lib and link error? This sounds like a custom library and you may need to make sure the linker settings are correct. Also, the tops of included headers may need to have items defined in them.
Best,
Eric
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Your program can't locate library named "fltk.lib"
please add the correct directory of fltk.lib into setting panel in project menu.
position:
choose "link"
category : input
object/library modules : "your path of fltk.lib"
dupengfei
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I am trying to use a Dialog bar in my application. I have created a command button and a slider on the dialog bar.
'Click event on the command button' can be detected using ON_COMMAND. Is there any way to detect changes on slider? I have tried ON_CONTROL and it did not work.
Many thanks in advanced.
One more question: What are the main advantages of rebar, differentiating it from dialogbar?
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You should handle notification messages of the slider. It can't be done by classwizard, so you have to handle it manually. Handling notification messages goes as following:
CMyDialog.h:
afx_msg void OnSliderChange(NMHDR* pNotifyStruct, LRESULT* result);
CMyDialog.cpp:
BEGIN_MESSAGE_MAP(CMyDialog, CDialog)
...
ON_NOTIFY(TB_THUMBPOSITION, IDC_SLIDER, OnSliderChange)
END_MESSAGE_MAP()
...
void CMyDialog::OnSliderChange(NMHDR* pNotifyStruct, LRESULT* result)
{
...
}
In CSliderCtrl documentation you can find various TB_XXXX notification messages.
Robert-Antonio
"Love without sex is like a fish without antlers"
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Hi. Does anyone have a simple C++ program that I can use to draw lines on a PC display? I would like something that I could just pass x and y start and end points, and have it plot a line.
I have Microsoft Visual C++. version 4.0.
I am not a professional programmer, so I would also appreciate an example of how this code could be called from the main program.
Thank you.
Bill
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Hi Bill,
I would say that it depends partly on the OS being used. Is it Windows 9X, NT (or greater), or DOS, etc.
If it's Windows, there are API functions available that are as simple to use as:
pDC->MoveTo(x1, y1);<br />
pDC->LineTo(x2, y2);
Which together will draw a line starting at (x1, y1) and ending at (x2, y2). Are you familiar with these kinds of functions?
Also, check out http://www.codeproject.com/gdi/[^]
If you haven't seen these articles yet, there are a bunch of good ones, and some are marked as 'Beginner'. In particular, check out:
http://www.codeproject.com/gdi/dcdrawing.asp[^]
Drawing took me some getting used to (I'm also far from a pro programmer) but after a few practice programs you'll get the hang of drawing in Windows.
Best,
Eric
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Thanks for the information, Eric!
I will be running Windows XP.
Can those APIs be used stand-alone, or do I have to use some sort of class thing? What inculdes do I have to put into my programs? Do you have a simple example?
Again, thanks!
Bill
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Hi Bill,
To answer about the APIs: They are available for your use in a program without creating additional classes, they are supplied as part of Windows and your VC++ 4 compiler should let you write programs that call them.
About the includes: To be honest, I'm not sure of the actual #includes needed to access them. The reason is that I take it for granted that they will be provided automatically by App Wizard (the tool provided in VC++) when I create the program skeleton.
Are you familiar with using App Wizard to generate a program skeleton? This will help answer about a sample program.
Best,
Eric
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