Re: ghosts and reload of form

1. A master page frmLogin is instantiated.
2. frmLogin calls a new master form frmTest.
3. On the frmtest is a button cmdExit that has a caption of 'Thierry.'
4. The cmdExit::click has thisform.release, which returns the user to the original master form frmLogin. The user does that.
5. A different user is now on frmLogin and calls frmTest.
6. frmtest.cmdExit::init sees the new user name and issues this.caption = 'Christophe'
7. The users sees frmtest with the button saying Christophe. However for a brief second when the form loaded, they saw the button say Thierry.
8. In a real form with only 1 control, that brief second is very, very short and probably not long enough for the user to "see".

So let's fix it:
1. Set frmtest.cmdButton.caption = ''
2. Move init code from control to form.
3. No help.

So let's really fix it:
1. Set frmtest.cmdButton.caption = ''
2. Move init code from control to form.
3. Have init code check a passed parameter (passed to the form) to see what the caption should be. Set the caption.
4. Still no help.

So let's really really fix it:
1. Set frmtest.cmdButton.caption = ''
2. Move init code from control to form.
3. Have init code check a passed parameter (passed to the form) to see what the caption should be. Set the caption.
4. Bracket caption changing code with "if pcount() > 0" so only fires when we want and so gen process does not set the caption by firing our code during generation (that would be bad).
5. Fixed. No more ghost cached image.

So because there is no Load method firing before the form appears, our button's capton must:
a. be blank
b. not be changed during HTML generation (bracketed with pcount seems easiest way)
c. set during form init via a passed parameter

Now why is this not usually a problem? because a form with a few simple controls renders so fast that the naked eye sees a blink but does not recognize the old display.

Now add a grid with 30 columns, 10 buttons, and 10 images. In the grid for example, you will literally see for 0.5 seconds the data from the previous time the form was displayed, until the init process for each control is finished.
THAT is a problem.

Based on what we have done so far, the only way to counter that effect is to set all controls to blank and set every property during the form init. You completely lose the ability to design any properties via the VFP visual tools, and end up writing many lines of code to do everything in the form init (based on some parameters).

Lockscreen will not help; it is the browser which is attempting to render the latest instance of the page. FiC is not asking it to do that. Thus is the FiC rendering is fast enough or there are few controls, no problem. otherwise the browser displays the last cached image -- which now has to be all empty controls which we set thru the form init.

Since VFP has Load and re-instantiates a new form upon request, the issue is only web based and not in LAN mode.

Hope this makes sense.

proc init
lparameters tParam1
dodefault()

WITH THIS AS awFrm OF aw.vcx

		.xxx = xxx  . . . . . . 
                .......
                .lockscreen=.t.
                if pcount() > 0

proc init
lparameters tParam1
dodefault()

if not thisform.wlhtmlgen
    with thisform
		.xxx = xxx  . . . . . . 
                .......
                .lockscreen=.t.
                if pcount() > 0

proc init
dodefault()    && fires FiC default, should be first thing in init per FiC

if not thisform.wlHTMLgen
    
 testme()

endif