C / C++ / MFC

Re: how to populate a treeview with database calls?

30-Oct-02 23:47

can you point me to a link with an example on how it's done?

i created a new class, which contains a new datastructure and i tried to append the new datastructure using setitmedata, but didn't work..

this is what i done:

hItem = trCtrl.InsertItem( "some string", 0, 2 );
trCtrl.SetItemData(hItem, (DWORD)myID);

i get error C2440: 'type cast' : cannot convert from 'nodeData' to 'DWORD'

Carlos Antollini31-Oct-02 2:57

Carlos Antollini

31-Oct-02 2:57

What kind of data is MyID?
by other side you must to ckeck if hItem has a valid value (hItem != NULL)

Regards

Carlos Antollini.
Pi Five[^]Creator

Sonork ID 100.10529 cantollini

Re: how to populate a treeview with database calls?

1-Nov-02 12:51

I create a class for storing the id data..

this is how i define MyID Class in short:
the variable Id is a private int variable. I create a new class for the unique id because if i want to store more data, i can just modify the class.

Class nodeData {
nodeData::nodeData() {
Id = 0;
}
nodeData::nodeData(int x) {
Id = x;
}
}

How to click a "button" from a program?

codewriter30-Oct-02 9:36

30-Oct-02 9:36

One of the third party dlls I used keeps showing a useless modal dialog box. I want to close the dialog box by "clicking" the Yes button from my program. How do I do that?

I was able to get the windows handles of the dialog box and the Yes button. I tried posting WM_LBUTTONDOWN, WM_LBUTTONUP, WM_LBUTTONDBLCLK messages with no success. While the messages were posted, I saw the Yes button being "clicked" (depressed) over and over again, but the dialog box just stayed open. If I post the WM_CLOSE message, then the dialog box can be closed but my program won't work because what I need is "clicking" the Yes button.

Any suggestion or tip is appreciated. Thanks.

P.S. BTW, I was posting messages to the dialog box from a separate thread.

User 665830-Oct-02 9:59

User 6658

30-Oct-02 9:59

This works for me:

SendMessage(wndParent,WM_COMMAND,MAKEWORD(::GetDlgCtrlID(wndButton),BN_CLICKED),(LPARAM)wndButton);

regards

modified 12-Sep-18 21:01pm.

codewriter30-Oct-02 10:23

30-Oct-02 10:23

Gregor S. wrote:
This works for me:
SendMessage(wndParent,WM_COMMAND,MAKEWORD(::GetDlgCtrlID(wndButton),BN_CLICKED),(LPARAM)wndButton);

Thanks.

I tried it. The dialog box is still open after the above code is executed. But if I click anywhere on the screen outside the dialog, the dialog will be closed. Actually, this is what happened when I post the WM_LBUTTONDOWN and WM_LBUTTONUP messages: I have to click somewhere outside the dialog to make it close. Cry | :((

Any other suggestion?

User 665831-Oct-02 2:04

User 6658

31-Oct-02 2:04

Mhhh, you might try to simulate the mouseclick outside the dialog with

SendMessage(wndParent, WM_ACTIVATE, MAMKEWORD(WA_INACTIVE, 0), LPARAM(HWND_DESKTOP));

But I have not testet it, but actually it should would

regards

modified 12-Sep-18 21:01pm.

codewriter31-Oct-02 4:31

31-Oct-02 4:31

Thanks for your help. The problem was solved with a ::EndDialog call. See my other post for details.

Christian Graus30-Oct-02 10:29

Christian Graus

30-Oct-02 10:29

Why don't you sent it WM_CLOSE ?

What is the useless dialog ? If it's a 'This person has not bought this component, for evaluation only' type deal, you'd expect it to be coded to be hard to close apart from via the button, for example it could check if the mouse is over the button when it is pressed.

Christian

No offense, but I don't really want to encourage the creation of another VB developer. - Larry Antram 22 Oct 2002

Hey, at least Logo had, at it's inception, a mechanical turtle. VB has always lacked even that... - Shog9 04-09-2002

During last 10 years, with invention of VB and similar programming environments, every ill-educated moron became able to develop software. - Alex E. - 12-Sept-2002

codewriter30-Oct-02 11:00

30-Oct-02 11:00

Christian Graus wrote:
Why don't you sent it WM_CLOSE ?

What is the useless dialog ? If it's a 'This person has not bought this component, for evaluation only' type deal, you'd expect it to be coded to be hard to close apart from via the button, for example it could check if the mouse is over the button when it is pressed.

No, I wasn't trying to steal a software. The dll shows the dialog box and ask the user to click Yes or No, however in my case the answer is always Yes and my program is not interactive.

Chris Richardson30-Oct-02 11:33

Chris Richardson

30-Oct-02 11:33

You _might_ be able to do this:

// Inside your thread.  Make sure NOT to mess with any MFC stuff here.
EndDialog( hWndYourDialog, IDYES );

I haven't tried it, so I don't know if it will work or not.

Chris Richardson

codewriter30-Oct-02 16:15

30-Oct-02 16:15

"I haven't tried it, so I don't know if it will work or not."

I tried, it closed the Dialog, but is not the same as clicking the Yes button, as a result my program would not work afterwards.

Thanks for the suggestion.

Alexinuk31-Oct-02 0:33

Alexinuk

31-Oct-02 0:33

What about sending IDOK instead of IDYES? Smile | :)

codewriter31-Oct-02 4:33

31-Oct-02 4:33

Alexinuk wrote:
What about sending IDOK instead of IDYES?

Great suggestion. But IDOK doesn't do it either, it has to be 4774 (the id of the Yes button). Thanks.

codewriter31-Oct-02 4:28

GDI question, how drawing a fine dotted line?

31-Oct-02 4:28

Chris Richardson wrote:
// Inside your thread. Make sure NOT to mess with any MFC stuff here.EndDialog( hWndYourDialog, IDYES );

I tried it again, this time it worked! Thank you very much!!!

P.S. I used 4774 instead of IDYES, it is the id of the Yes button on the dialog.

EndDialog(hWndDialog, 4774);

Anonymous30-Oct-02 9:35

Re: GDI question, how drawing a fine dotted line?

30-Oct-02 9:35

I'm a beginner and I already know how to use dc.MoveTo() and dc.LineTo(), but how can I draw a dotted line instead of solid? Do I need to create a brush, and how would I do it?

The line should look like this (vertical, 3 pixel width, X = black pixel):

x x 
 x
x x
 x
x x

thanks for help! Smile | :)

Christian Graus30-Oct-02 10:27

Christian Graus

30-Oct-02 10:27

You can create pens that are dashed or dotted with these pen styles:

PS_DASH Creates a dashed pen. Valid only when the pen width is 1 or less, in device units.
PS_DOT Creates a dotted pen. Valid only when the pen width is 1 or less, in device units.
PS_DASHDOT Creates a pen with alternating dashes and dots. Valid only when the pen width is 1 or less, in device units.
PS_DASHDOTDOT Creates a pen with alternating dashes and double dots. Valid only when the pen width is 1 or less, in device units.

Brushes can be created with a number of styles ( and a lot more in GDI+ ) that may suit you better.

Christian

No offense, but I don't really want to encourage the creation of another VB developer. - Larry Antram 22 Oct 2002

Hey, at least Logo had, at it's inception, a mechanical turtle. VB has always lacked even that... - Shog9 04-09-2002

During last 10 years, with invention of VB and similar programming environments, every ill-educated moron became able to develop software. - Alex E. - 12-Sept-2002

Re: GDI question, how drawing a fine dotted line?

Anonymous30-Oct-02 22:23

30-Oct-02 22:23

A pen with PS_DOT doesn't make a fine dotted line, I tried this.

could you give me an example who to make and use a brush, please?

serial comm.

peter ho30-Oct-02 9:20

peter ho

30-Oct-02 9:20

Is there any special trick to send a hex value through a serial port?

Thanks, p. t.

combo box as a ToolBar

Anonymous30-Oct-02 9:09