Tab Control Defines

I have two tab controls on my main panel, both are loaded with the same uir which gets the same controls and callback functions.
When I execute the same callback from the different tab controls i get
panel = 4 control = 93 from the 1st tab control and
panel = 13 control = 93 from the 2nd tab control.
This is what I was expecting.
The control is defined in the .h file for the uir as #define LASER_SEED_ENABLE 93
My question is are there define constants that I can use for the panels (4 and 13)?
How does the tab control determine the panel number? Is there an include file or is the panel number determined at runtime?
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Paul_Knight_Lockheed_Martin wrote:
My question is are there define constants that I can use for the panels (4 and 13)?
How does the tab control determine the panel number? Is there an include file or is the panel number determined at runtime?
Hi,
you should better not use constants because every time you edit the UI you are at risk that the assignment of control/panel id's is changed. At run time, you can obtain the panel handle of tab panels using
GetPanelHandleFromTabPage ( main_panel_handle, PANEL_TAB, 0, &tabpanel_1_handle );
Note that control ids are not unique, only the combination of panel id / control id is.
In the UI editor, you can use the menu View / Preview User Interface Header File.
Hope it helps.

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I have a problem with tab control which has been bugging me for a long time and i can't seem to solve it.
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The order of the property nodes is not defined because you have no dataflow between. Execution order is not defined by where a function is on the block diagram (left, right, top bottom), but how data is connected. You have no connections between the properties so they execute in parallel and you have no way of knowing which one will actually execute first. The simplest way to enforce dataflow is with the error in/error out connections. That is shown below. also shown is one way to select the active page. I used a local variable but if you make the tab control an indicator instead of the default control, just wire a value to the terminal itself.
Message Edited by Dennis Knutson on 07-26-2007 08:16 PM
Attachments:
Tab Control.PNG ‏13 KB

Tab control event Keypress

Hello,
I'm using a Tab control and can't find out how to handle the following situation.
We know that when operating a Tab control we can jump from Tab to Tab by pressing <Ctrl-Tab>.
When at the last Tab I would like to jump to another conbtrol and not again to the first Tab.
Unfortunately in this situation <Ctrl-Tab> doesn't generate an EVENT_KEYPRESS.
Is there a way to handle this situation?
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I don't understand why you cannot get the keypress event: I have tried to modify TabExample example installing a callback on the tab control and properly get the keypress event on Ctrl+Tab. Here the code for the tab control callback function:
int CVICALLBACK TabCallback (int panel, int control, int event,
void *callbackData, int eventData1, int eventData2)
int nextCtrl, lastTab, pageIdx, virtualKey, modifierKey;
if (event == EVENT_KEYPRESS) {
GetActiveTabPage (panel, control, &pageIdx);
GetNumTabPages (panel, control, &lastTab);
lastTab--; // Zero-based index
virtualKey = eventData1 & VAL_VKEY_MASK;
modifierKey = eventData1 & VAL_MODIFIER_KEY_MASK;
// Properly handle Ctrl+Tab
if (modifierKey == VAL_MENUKEY_MODIFIER && virtualKey == VAL_TAB_VKEY && pageIdx == lastTab) {
GetCtrlAttribute (panel, PANEL_TAB, ATTR_NEXT_CTRL, &nextCtrl);
SetActiveCtrl (panel, nextCtrl);
return 1; // Swallow the keypress event so that active page doesn't change
return 0;
Alternatively, you can handle the situation inside a panel callback:
int CVICALLBACK PanelCallback (int panel, int event, void *callbackData,
int eventData1, int eventData2)
int lastTab, control, pageIdx, virtualKey, modifierKey, nextCtrl;
if (event == EVENT_KEYPRESS) {
if ((control = GetActiveCtrl (panel)) == PANEL_TAB) {
GetActiveTabPage (panel, control, &pageIdx);
GetNumTabPages (panel, control, &lastTab);
// eventData1: a 4-byte integer consisting of 3 fields: 0x00MMVVAA
// MM = the modifier key, VV = the virtual key, AA = the ASCII key
// key masks are defined in userint.h
virtualKey = eventData1 & VAL_VKEY_MASK;
modifierKey = eventData1 & VAL_MODIFIER_KEY_MASK;
// Properly handle Ctrl+Tab
if (modifierKey == VAL_MENUKEY_MODIFIER && virtualKey == VAL_TAB_VKEY && (pageIdx == lastTab - 1)) {
GetCtrlAttribute (panel, PANEL_TAB, ATTR_NEXT_CTRL, &nextCtrl);
SetActiveCtrl (panel, nextCtrl);
return 1;
return 0;
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Tab control - takes long to change between tabs

Hi everyone,
I am using a tab control to display a set of results on each tab. So, I have a tab control with three tabs and each tab consists of 16 indicators which are updated with values. Now, when I run the program, it is taking a long time to switch between these tabs. For instance, if I am currently on Page 1 and then I click Page 2, it takes around 5 seconds to change the tab. I know this should be like this but I cannot understand what is happening.
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Thanks!
Solved!
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I would also recommend to streamline the code a little bit.
For example the cases in frame#1 differ only by some small operations. All that belongs inside the case is the code that differs. none of the local variable seems to be necessary. All that belongs in the smaller cases are the colorbox constants (might be easier to index into an array of colors). If you autoindex on the For loop boundary, you don't need to wire N and you can eliminate the "index array" operation.
In frame #2, you could autoindex on arrays of references, all in a single FOR loop (same for all the initializations).
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You can probably eliminate all these hidden indicators and associated local variables. The wire is the data!
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You can get the panel handle of the desired tab, and then install a panel callback for that panel. I've attached a sample program. Hope this helps.
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It's true that you can use the label text and discover the active panel by means of a series of comparisons between strings, but it seems to me not the best way to go and surely not the fastest. The same consideration applies to ATTR_CONSTANT_NAME (the panel attributes which returns the text of the constant name, e.g. "MyPanel"). Moreover, this last solution leads to these additional critical points
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Message Edited by Roberto Bozzolo on 01-05-2007 12:15 AM
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Make the tab control a control and not an indicator. If you want to write
to it you need to create a local variable.
"Carlos-R." wrote in message
news:[email protected]..
I have a VI with many controls and indicators,these are spread on a
tab control.This tab control works with out any problems but if i
create a exe file then the tab control is fixed. How can I create a
exe file so that the tab control on it work´s ?"

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