Handles sign and reminders

I'm having some problems with the Panel handles and reminders, I think I can be misunderstanding exactly what consititues a 'panel '.

My program has only a single panel with three tabs, namely panels and section orders of my .h file looks like this:

#define PANEL 1 / * callback function: panelCB * /.
#define PANEL_TAB 2

My problem comes in the reminders when I try to set or get values of control, I have a reminder of command button that looks like this:

int CVICALLBACK StartLoggingClicked (int, int int event, control panel,
void * callbackData, int eventData1, int eventData2)
{
switch (event)
{
case EVENT_COMMIT:
SetTabPageAttribute (panelHandle, PANEL_TAB, ATTR_DIMMED, 0, 1);
SetTabPageAttribute (panelHandle, PANEL_TAB, ATTR_DIMMED, 1, 1);
           
SetCtrlAttribute (Panel, TAB_MON_COMMAND_PAUSEMON, ATTR_DIMMED, 0);
SetCtrlAttribute (Panel, TAB_MON_COMMAND_STOPMON, ATTR_DIMMED, 0);

break;
}
return 0;
}

panelHandle is the global variable assigned by the call to LoadPanel. When I look at the table of values and panelHandle they are different (for example, panelHandle = 1, Panel = 4). Coincidentally (or not...) 4 is the value assigned to the command button in the .h file.

If I do: SetTabPageAttribute (Panel, PANEL_TAB, ATTR_DIMMED, 0, 1).

I get an error "the control is not of the type expected by the function", but it works very well with the global panelHandle.

If I do: SetCtrlAttribute (panelHandle, TAB_MON_COMMAND_PAUSEMON, ATTR_DIMMED, 0);

I get an error 'Invalid control ID', but it works with the parameter callback 'panel '.

I have another article of the code in a function called by the recall:

GetCtrlVal (panelHandle, TAB_BOARD_STRING_DATAFILENAME, & t_LogFilePath);

Gives the error "the command has not value.

If I pass the value of the 'panel' reminder to the function and do:

GetCtrlVal (Panel, TAB_BOARD_STRING_DATAFILENAME, & t_LogFilePath);

I get "invalid arugment type: found"pointer to table 260 char", should"pointer to int.

It seems to me that the values of the Group and panelHandle do not match to what I think they do because, it seems, control of the values that I'm passing are false (i.e. do not correspond to the correct Panel) in some cases. Any help would be greatly appreciated.

I searched for details about what did and did not imply a Panel to try to understand why I see different values, but I have not found anything. If there is a reference that I missed please point me to it.

We are here in the typical question everyone who uses a tomb tab control. Be telegraphic,

each page of a tab control (actually is) a panel separated with its own handle to use when it comes to control over the page of the tab itself.

To be more clear, the tab is control over your main table and dealing with the tab control must be made with the handle of the main panel (panelhandle in your case): this is the case, for example when you use SetTabPageAttribute or GetTabPageAttribute or the setting / recovery of the attributes of the tab itself control (ATTR_TOP and so on); This is also true if you want to run the control tab with InsertTabPage, CopyTabPage and so on.

However, before turning to a control on a page of tabs, you must retrieve the handle Panel appropriate to the page of the tab itself, for example using GetPanelHandleFromTabPage. With this handle, you can send commands located on the tab page. Only in the case where your reminder is triggered from a control in a page of tabs and wants to act on another control on the same page, you can use 'panel', which is the first parameter in the callback of control: this is the case when the reminder of a button on the tab page should read the value of a control on the same page. But if your button is elsewhere (outside of the tab control or on another page of the tab) you will need to retrieve the correct handle before you attempt to set a control: otherwise will result in errors that you find and a little more, you don't have yet.

The example of TabExample bundled with the CVI (\samples\userint folder) can be useful depth in the use of the tab control.

Tags: NI Software

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