Controlling focus in a Tab Canvas when a FORM_TRIGGER_FAILURE is raised

Hello,
I am currently working on a form that is using a Tab Canvas. The canvas has about 9 pages, and I am, at this moment, adding error handling functionality on the fifth page. My problem happens when a condition is met that raises a FORM_TRIGGER_FAILURE exception and the focus automatically goes to the first page of my canvas instead of staying on the fifth page. Is there anyway I can set the focus so that it remains on page 5 instead of going back to the front page?
Thank you,
Jojo

I use tabs, and a FORM_TRIGGER_FAILURE will not by itself cause focus to move to the first tab. There is something happening in your form just prior to the FORM_TRIGGER_FAILURE that is placing focus to some item in the first tab (maybe you're calling a function or procedure that is doing it?). If you don't know, try running the debugger and trace through your code during runtime and see what is causing it.

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Focus problem in TAB Canvas form

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I am calling FormB from FormA by using
CALL_form('FormB.FMX',NO_HIDE);
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Oracle & Form Version Oracle 10g
THanks in advance

Hi,
When I run the form directly also I am getting the same problem,
Hi Tony,
<<Define what's blank??? Errors???? >> means , I need to click on the execute query button to see the data, even to see the controls in the forms.
As I said, i am calling this form from another form, and I am assign the values in the prequery, I am gettign the result propery, but when I click on any other control, the form become empty, I need to click on exec query to see the values and tex items etc.
This form has one content canvas and one tab canvas. What are the properies to set to place tab canvas on the content canvas.

Tab canva disapear whith stacked canvas

hi guys,
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in when-button-pressed
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Yours is a combination of issues. Just going to the block will not ensure the Tab Page and stacked canvas will be visible. Unfortunately, in this situation, you cannot relay on a simple GO_BLOCK to display everything correctly. You will have to explicitly display the Tab Page (as dfcii indicated) and you will need to explicitly show your stacked canvas with Show_View. When you leave your stacked canvas, you will need to ensure it is hidden as well as you can't rely on the When-Tab-Page-Changed (WTPC) trigger to hide your stacked canvas. Consequently, you will need to include a call to Hide_View in your WTPC trigger. Also, make sure you navigate away from the item in your stacked canvas before you call Hide_View.
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Craig B-)
If someone's response is helpful or correct, please mark it accordingly.

Tab canvas disappear when the main stacked canvas reach the end of column

Hi all,
I have 3 canvas ( 1 main canvas, 1 stacked canvas ) and this link to 1 tab canvas. All these are in the same window.
Whenever using the keyboard to press enter navigate from column to column and when it reach the end of the main canvas which is about to jump to the stack canvas, the two canvas ( stacked & tab ) was hide by itself. Even I have stated earlier to show all canvas in the pre-block trigger. when I keep on press the enter to jump to the next stacked canvas, this stacked canvas is being shown again. My tab canvas was not appear if I am press the enter key. However, if I press the arrow key down the tab canvas is appear. This I wasn't do any code to call the tab canvas.
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Anyone has this experience before ?
Thanks.
Lim

Hi Lim
Pls check this hope it helps u to recognize dealing with muti-canvas in 1 window...
how to use stack canvas in tab canvas in oracle forms
Regards,
Amatu Allah.
Edited by: Amatu Allah on Sep 22, 2011 2:23 AM

Setting stacked canvas properties when inside a tab canvas

Hi all,
I grope setting the x and y position of a stacked canvas programmatically : I work inside a tab canvas , there is one multirecord based block which is split into two tab pages. The problem is that the x and y positions of each first item in each tab of the block are no the same. And I want to hide and show the stacked canvas on which is based the scrollbar of the block , according to the top_most_tab_page.
The stacked canvas has the same width and height as the tab canvas ; it has viewport width set to the width of the scrollbar , say 0.415 ; it has viewport height set to the length of the scrollbar , say 1.833 ; the viewport X/Y position on canvas properties are set to 0.
I tried to set the VIEWPORT_X_POS and VIEWPORT_Y_POS properties of the view programmatically to place the scrollbar just sticky with the first item when in each tab page , but the scrollbar is not displayed on the desired place. It is moved.
So how to place the stacked canvas at the right position to be stuck with the left first item ?
Thank you very much indeed.

I did a little test and it works (it'll only take you 3 min)
Create a new Form.
Add 3 Canvases 1 Content and 2 Tab with the following Properties
Content
Vieport X Position on Canvas: 0
Vieport Y Position on Canvas: 0
Width: 540
Height: 324
Master Tabs
Vieport X: 35
Vieport Y: 20
Vieport Width: 460
Vieport Heigth: 280
Detail Tabs
Vieport X: 150
Vieport Y: 95
Vieport Width: 260
Vieport Heigth: 160
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From there select both tab canvases to be shown.
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Multi-Tab Canvas Navigational Controls

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I assume I must place the triggers on the block (or blocks) associated with the respective tabbed canvases.
null

The trigger must be placed at the form level. Use "if :system.cursor_block = 'BLK'"
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What is the best way to determine when you user has navigated to a new tab canvas/page when the navigation does not occur by clicking on the tab canvas's Tab? For instance, when the user clicks a button item that navigates to a different tab canvas/page I want to disable the tab canvas/page the user came from.
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Hi
i asked that question before pls read the following link
https://kr.forums.oracle.com/forums/thread.jspa?threadID=2191397
Amatu Allah

Tab Control Focus

I have a tab controls with two tabs. I put a lot of indicators under each tab. During run time, the indicators will get updated, and the user can select which tab he wants to view. I only want the user to change the tab order. It seems like when the user is on the 1st tab and the indicators on the 2nd tabs are being updated by the program, the problem will switch the tab control to the 2nd tab. Is there a way to disable that?
Kudos and Accepted as Solution are welcome!

You'll have to show us a VI. I have never seen the tab switch from one page to another unless either the user clicked on a new tab, or the program programmatically changed the tab. Generally for me, the tab control is never read from or written to inside the VI, it is just used as a mechanism to separate and organize different parts of the program. Updating an indicator on a non-shown tab should not be causing that tab to be switched to.
How do you want the user to change the tab order? Do you mean that you want to swap the locations of the tabs so that page 2 moves to the left ahead of page 1?

Tab canvas + post-forms-commit + form_trigger_failure

Hi all,
There is a tab canvas with eight tab pages in my forms.
In the post-forms-commit form-level trigger there are controls based on some conditions before executing the processes. When the conditions in the controls are not met then a stop alert is shown and form_trigger_failure is raised. All of these actions , that is the alert and form_trigger_failure , are contained inside a procedure named affiche_erreur.
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Mark , the when-tab-page-changed trigger does not fire after I pressed the alert button although the focus goes always to the non-navigable button in the first tab-page. I wrote a pause statement at the beginning of the when-tab-page-changed trigger but there was no pause alert at runtime.
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Tab Canvas

Hi,
I am using Forms 10g. I have Content canvas named CANVAS1 display few items from BLK1. I created a tab canvas called TAB_CAN contains TAB_PAGE1 and TAB_PAGE2, display items from BLK2
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show_view('canvas1');
show_view('tab_can');
go_item('blk2.item1);
go_item('blk1.item1)
enter-query;
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show_view('tab_can');
go_item('blk1.item1)
go_item('blk2.item1);
enter-query;
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Regards,
Murali

Hello Murali,
As you are saying you want to show a Content canvas (Canvas1) and Tab Canvas (Tab_Can) both at the same time, you need to use more than one window for this.
Actually at any instant of time, you can show only one canvas on any window. So have two windows WINDOW 1 and WINDOW 2.
In Content canvas, set the window as WINDOW1, and in WINDOW1 set the primary canvas as CANVAS1. And, for tab canvas actually you should have another content canvas(CANVAS2) on which you have placed this Tab_Can. So in content canvas (CANVAS2), set the window as WINDOW2, and in WINDOW2 set the primary canvas as CANVAS2.
It will work i feel.
Regards,
Yathish...

Tab Canvas displaying Stacked Canvas at runtime disappears?

Hi,
I have 3 canvases that contain the following:
1) Content Canvas -- This contains the TREE item.
2) Tab Canvas -- A tab canvas with a single Tab Page
3) Stacked Canvas -- This is a Stack Canvas with a few
text items on it.
4) Single Window.
======At runtime the following actions occur: ==========
1) The Viewport of the stacked canvas is set to the
Viewport of the Tab Page on the Tab Canvas so that it
looks like the Tab Page has a vertical and horizontal
scrollbar with text items displayed.
2) A text item on the Stacked Canvas is in focus as soon
the as the form window is displayed.
===================Problem is : =====================
1) When I select a Node of the Tree Item, the Tab Canvas
automatically disappears(or becomes invisible) , as a
result the stacked canvas displayed within it at
runtime also becomes invisible. I am left with only
the Tree item being displayed.
=======================================================
PS : I have never experienced this problem with just the
content canvas and the Tab Canvas together.
Any soultion to this problem is most appreciated.
Thanks
Sharath

I am experiencing the exact same thing. The width of the tabs in the layout editor is varied depending on the length of the text. However, at run-time, the width of the tabs is fixed, causing the tabs to be wider than the window and a set of VCR buttons to appear in the upper right corner of the canvas. Personally, I think this is a Forms bug. Why would they intentionally let us set the width to variable at design-time only to force a fixed width at run-time?

Forms 6i, Stacked & Tabbed Canvas- Wierd behaviour

Hi,
I am having a wierd problem:
Scenario:
I have a datablock of 40 columns.
I put 1 (say col-1 on page_1 and col-21 on page_2) column each on two different TAB pages.
I created 2 stacked canvases: page_1_stacked & page_2_stacked
I put col-2 to col-10 on page_1_stacked
and col-22 to col-40 on page_2_stacked
I used the following code to show/hide the appropriate cols/stack canvases when the users changes Tab pages:
[when-tab-page-changed
if (:system.tab_new_page ='PAGE_1')
     then
     show_view('PAGE_1_STACKED');
     hide_view(''PAGE_2_STACKED'');
elsif (:system.tab_new_page ='PAGE_2')
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     hide_view('PAGE_1_STACKED');
     show_view(''PAGE_2_STACKED'');
end if;
Problem:
Everything seems to work fine, the stacked canvases show/hide as expected, but --->as soon as I put my cursor in any column on TABBED PAGE (here col-1 or col-21), all the stacked canvases vanish
-->if as a result of above case where I put the cursor in a tabbed-page col and canvas vanished, I navigate to the next field (which is on canvas), the canvas shows up (which is normal)....but then this canvas wont get hidden with my hide view... and end up with all stacked canvases shown together or none at all
I have played around with all the properties and am really trapped.
Please help!
Thanks.

Devang, are you aware that if you put the cursor focus in a field, Forms will ignore any show_view or hide_view commands if they cause the cursor to disappear? And if your cursor focus is in a field in a stacked view, hide_view will not work. Forms will not let you hide or cover up what ever item is identified by :System.Cursor_Item.
I do not know why you need Col_1 or col_21 on the tab canvas. Put them on your stacked canvasses, too.
Use a when-new-item-instance block-level trigger to determine which tab page should be displayed. If :System.trigger_item = col_1 through col_20, make sure Page_1 is displayed, and for col_21 through col_40, make sure Page_2 is displayed.
Similarly, use a when-tab-page-changed trigger to move the cursor to the correct canvas. You wouldn't even need to use show_view or hide_view, Forms will do that for you each time you move into an item on either canvas.
And why are you using two canvases anyway? Since you are using a horizontal scrollbar, why not put them all on a single canvas? (And then you wouldn't need the tab pages.)

Tab canvas disappears at run time

Hi,
I have a Content canvas with a data block displaying fields in the top section of the canvas_main. Bottom half of the canvas_main has canvas_tab with three tab pages tab1, tab2, tab3 all have data block (child records fo above block) each.
At run time I can see the canvas main with its items but cannot see the tab pages.
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Did try to use SHOW_VIEW('tab_canvas') without any luck.
Any advice is greatly appreciated.
Thanks

Hi,
a tab canvas is like a stacked canvas.
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Regards
Hans

Place a Tab Canvas within a Tab Canvas (there is more Stack Canvas)

I Use Forms [32 Bit] Version 10.1.2.0.2.
Hi All.. I have the same problem with this case ( Place a Tab Canvas within a Tab Canvas ).
but I need help with my case, what if there is more stack canvas, like this :
- I created Tab Canvas first, then
- in my first Tab Canvas I put the new tab canvas (this solved), then
- I create again new Tab Canvas in the second Tab Canvas.
How do I control that in Trigger Level Form - WHEN-TAB-PAGE-CHANGED ? if I want to show if :
- First Tab Canvas I klik then the second Tab Canvas is show (solved), then if
- I klik second Tab Canvas then the third Tab Canvas is show. (this my case)
thx b4 to all ...... I am newbie in forms
Edited by: 973372 on Dec 14, 2012 2:05 PM

not yet

Controlling focus in a Tab Canvas when a FORM_TRIGGER_FAILURE is raised

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