Load controls to SSTab tabs other than 0 at run time - vb6

I have an SSTab object that I am adding both tabs, and controls to at run time.
I've only been able to get runtime controls to appear in Tab0 at run time.
(In other cases, where the new controls are part of an array that was already in, say Tab3 at design time, I can add extra controls there - provided the tab in question is the active tab).
I'd thought initially that I needed to set the container of my new controls to the relevant tab of the SSTab. I can't actually see how to do this, and some reading around suggests that perhaps the SSTab control doesn't work quite how one might expect?

So, being unable to find out if this was possible with SSTab, I ended up doing something else.
Using a TabStrip from Microsoft Common Controls 6.0, combined with frames that were created dynamically at runtime when a new tab was added, and using these frames as containers for controls, I was able to acheive what I wanted - witha fair bit more code that I was hoping for.
(I won't be accepting this answer, in the hope that someone can answer the original question about the SSTab control)

Related

Scrollable list of subpanels in labview

I am making a program that sweeps software parameters of a DUT and logs measurements from various instruments while doing so.
To make this program more flexible, I want the user to be able to configure an arbitrary set of instruments (including multiple of the same kind) to log measurements from. Each instrument has different configuration parameters.
What i need is a dynamic UI, where I can add (and remove) Instruments and have a different configuration UI for each instrument.
I made a little sketch of what I have in mind: UI proposal
What I tried so far is to have an Array of a Cluster with a Subpanel in it, but all the Subpanels in the Array show the same VI.
A simple way of doing this is 2 subpanels. One stays on the main screen with your current vi running. When you want to switch vis load the new vi into the off screen subpanel. Move the positions of the subpanels so that the new one is on screen. Unload the old one and allow the new one to start. The old one is now ready for the next vi to run
Instead of a cluster or an array, the basic idea for making something like this work is to have one subpanel which will contain multiple subpanels inside it and populate/position/resize/show/hide them, etc.
See this thread for a discussion and a basic example I posted there - http://forums.ni.com/t5/LabVIEW/Independent-cursors-on-array-of-cluster-of-graphs-or-work-around/m-p/2319700#M728304
(Note - that thread shows a discussion and expansion on the topic. The original simpler example is here - http://forums.ni.com/t5/LabVIEW/User-interface-problem-list-of-clusters/m-p/2311770#M726599 )
While I always liked the idea of this, I never actually needed it for an actual UI, so I don't think I have anything to add beyond this example. Also note that the example is very crude and only meant to demonstrate this concept.
Note that there are two ways of handling the number of panels - have enough to be displayed and control which VIs they show based on the scroll bar or create "enough" subpanels and control their visibility.

Page items sliding in in metro style apps

I'm experimenting with creating a metro style app with Visual Studio 2012, I am not the most experienced designer but one thing with my applications is confusing me.
I have been working with 'basic pages' instead of blank ones for the different pages in my application for design consistency, however it seems that these 'basic pages' have a strange behaviour. Every item I place on the page (buttons, text boxes, etc) will all slide in one by one when the page opens. For example if I run the application and navigate to a page with 10 buttons, it will do a brief animation where each button will slide in from the right side to the left side. When dealing with a large number of items on one page this can take a lot of time as each item slides in seperatley.
Looking at the properties for each item I have been able to change the direction it slides in while loading the page by changing the flow direction. Also with a bit of research I am thinking it could potentially be due to either the metro style 'enterPage' or 'enterContent' animations, though I can not be certain.
I have tried to experiment and figure this out, and search to find out what causes this so I can modify it (Ideally I would like to just group items together to slide in with each other) however it's kind of a difficult thing to search with vague words, so I'm asking here.
What is causing this and how might I go about modifying it?
EnterPage shouldn't be sequencing the animations. They do offset some of the animations of a number of elements, but it shouldn't be each one sequentially.
Are you using WinJS navigation?
Well after a bit of experimentation I figured out that putting all my page content inside a grid made them all come in at once like I wanted. I probably should have tried that earlier but everything was already inside an outer grid for the page, so I thought that woulda handled it.
I don't quite understand it fully, but that works for now.

What could possibily slow down my flex mobile application?

I am working with flex for the last two years on some desktop apps. Until now I never had any performance related issues but today as we completed a mobile application for the iPad, I'm facing a challenge, the application is incredibly slow on the iPad.
http://i.stack.imgur.com/qkbWn.png
Slow, means that when I press a button in the menu to change the splitview I must wait something like 5s. Then scrolling is really slow two, with less than one fps and my TextInput starts to bug (the text is not in his box anymore).
I started to read a lot of blog post and presentation about optimisation for the mobile platform and then I rewrite some of the components I use. I removed the SkinnableContainer for instance and replaced it by a VGroup including some actionScript based drawing.
Now what you see is a VGroup (the dark grey one) containing some others VGroup (the group with title here) and then each widget is an HGroup with a label and a Widget. I only use Label and TextInput for the text.
Creation time is slow even (several seconds to create the view) for another page where there is only 4 text widget on it, or another one with only a list with a custom item renderer where each row is a set of 4 labels.
The whole things is cabled with RobotLegs, with nothing fancy, one models is injected in the view and at the beginning I set a member variable on the view with this object to bind my variables.
Frankly my thinking right now is : it smells fishy because if I've done everything right it is impossible to have such low performance and thinks that flex is competitive on the mobile platform. So right now I'm trying to disable the application piece by piece to try to locate what could slow it like that. I've got a couple suspects to check, for instance I've got some binding warning to check, and then see if robotlegs has got its share of the problem.
So my main question here is what do you think, and could you have some ideas about "is there a problem" and "how do we solve it".
Thanks
Run profiler for startup and separatelly for each operation that takes longed that it needs. Then prioritize the problems and try to solve them with basic optimization techniques.
Some problems you will not be able to solve fast - e.g. time for creating big components. The only option there is to rewrite those components with AS3 without MXML, styles and anything. I'm sure that flash.text.TextField is created many times faster than mx.controls.Label. The same for other components.
When component is created, it can be reused at a very low price. In your app there must be a lot of places where you recreate while you can reuse old components. It will save you memory and time.
Layouts tend to redraw even when it's not needed. If you have a lot of nested layouts, find the most critical places and replace a series of layouts with one custom layout or even component.
This all is very developer time consuming. At the end you will not get a smooth app anyway, but I believe that it can become usable.

windows.form c# moving between forms

I am designing an installer interface for a already written program. It is my first windows.form. I see three approaches to solving my "problem" of needing multiple "screens". I can add all the labels/buttons/interface, and then hide/show them at events. Or I can close and open a new windows? Or do I somehow load my next form into the window frame (sortv like an iFrame approach)? Can somehow help explain how to do this?
Thanks!
Though there is nothing stopping you from using any of the approaches that you mentioned,
using separate windows and opening/closing them would be cleaner. If the code for individual windows gets complicated it would be clearer if they were separate.
Since you said you are doing installer's particulary take a look at Wix. It was meant to be used for creating installer's. It has it's own approach of building UI from XML's.
I would design my "screens" as unique frames with each frame having the controls it needed. Then I would just swap them in and out of the main window.
Its sort of like an IFrame (visually at least).
I agree that WiX is worth a look. An alternative to WiX that some people like more (it's just different, some people like one approach, some like the other) is NSIS.
When I have a requirement that calls for swapping out the controls in a single window, I tend to create a user control for each "page".
Have you considered using The Panel control? You can group certain controls together and have them placed inside one or more Panels.
You could Hide/Show each panel when required.

VB6 silently deleting huge chunks of control data from forms

My project has maybe 130 controls (total of all labels, textboxes, etc.) in an SSTab (4 tabs). The project loads fine, it runs fine, I don't see a single error or warning at any point, but when I save the form with the SStab on it, the SStab data isn't saved (it is completely gone). Normally the relevant portion of the .frm file looks like this:
Begin TabDlg.SSTab SSTab1
Height = 8895
[1550 more lines of code for all the controls]
Width = 540
End
Begin VB.Menu FileMenu
But lately it's getting cropped to:
Begin TabDlg.SSTab SSTab1
Begin VB.Menu FileMenu
This is very frustrating! In my VB IDE, the frame, sstab, and all the controls are there, editable, running/compiling fine, no error messages at any point, but when you save the file, 1550 lines of precious sstab data just disappears - again, with no warning or error messages. So if you exit and restart the IDE, you get a form load error because 60% of the code is now missing. The log file points to the first error it finds (in this case a Begin TabDlg with no End) - there's no other info in it. (The log file was generated after the code was deleted and saved, so it makes sense that it wouldn't be helpful.)
When I first posted this question, I thought it had to do with the number of controls, because it appeared after I added a control, and in my first few tests, seemed to disappear when that control (or other controls) was deleted. Now I can't seem to get that form to save under any circumstances, even when I delete many controls (bringing the number of controls far below where it was when it was last stable).
I also tried deleting the SStab and moving all the controls to 4 different frames. I successfully did that in the IDE, but when I saved, a huge chunk of the data (starting with a slider control) was missing. So I have no fraking idea what is going on.
The problem is reproducible on two different PCs, so it doesn't appear to be a hardware/corrupt software VB install issue.
Has anyone else run into something like this?
Create a UserControl for each tab. That makes editing MUCH easier. It also allows you to nicely modularize the code, so each tab lives in its own file, and it'll allow you to reuse tabs elsewhere if you want.
Sounds horrible, never heard of anything like that.
Presumably you aren't getting an error log file from VB6 when you load the form into the IDE before it gets corrupted? The log file has the same filename as the form file but with a .log filename extension. For example, if errors occurred when loading Myform.frm, Visual Basic would create a log file named Myform.log. The error messages you might see there are documented in the manual.
Have a look in the Windows Event Log, see whether it records any interesting problems against the VB6 IDE?
Are you using any weird controls? Maybe one of them is somehow corrupting the FRM or FRX. FRM files are just text as you obviously know & the format is documented in the VB6 manual. Can you see any corruption in the FRM in a text editor? If you remove any properties defined in the FRX, does it still fail.
I think I would try creating a new project and a new form, and then use the IDE to copy and paste all the control definitions into it - no code. Play with the new form, see whether it has the same problem. Maybe you can recreate the form this way without the problem. If the new form does have the problem, do the same thing but only take half the controls. Maybe you can find a problem control by "binary search".
I get the same problem when attempting to save a form when the .FRM is writable but the .FRX is read-only
Not sure if this is the issue, but on a VB6 form, there is a limit to 255 (or is it 256) named controls. Perhaps you are running into that?
One way around that limitation is to use control arrays. For example, if you had 10 labels, instead of label1, label2, label3, etc, you could do label(0) through label(9), and use up only one named control.
The other thing worth mentioning about the SSTAB is the way it shows/hides controls. While it may appear that the controls are on separate tabs, what is really happening is that the controls are getting moved waaaayyyyy to the left (and consequently out of view). Perhaps with so many components, the SSTAB is choking on this in the IDE as it tries to render the controls in design view?
Again, not sure if this is the issue, but I know these two tidbits are relatively unknown.
So the SAVE function is not working.
I suspect one of the components you are placing on the tab strip is the culprit.
So ..
1) Take an inventory of each and every kind of component you are placing on the form
2) eliminate one (kind), SAVE
3) Did it SAVE?
-> Yes = that was the problematic control
-> No = return to step 2, but pick another kind
Of course, its important to remove all controls of a certain kind in step #2 (for example, ALL labels, or ALL textboxes, etc).
I have never heard of this happening however.
You are not alone! I've seen this problem. . .in fact I'm dealing it right now, which is what brought me to this site.
I've been working with VB since '94 (VB3) and I first saw this problem about 5 or 6 years ago, while using VB6. My solution then, was not unlike some of the suggestions that you have recieved from the good folks who've responded above: throw out the existing file and rebuild the form in a new file. I did that back and the affected form has worked ever since.
My current problem is appearing in another, much newer form, and the replace/rebuild option (performed about a month ago) only worked for about three weeks. Now the problem is back and each new iteration of the file gets corrupted very quickly. Following the reply above regarding the total number of allowable controls, I'm looking into just how many controls I have. . .and, as it happens, I was in the process of consolidating the primary the buttons and menus into control arrays, simply because it was going to streamline their management.
I can also confirm your observations about moving the project to a second PC. . . I've done that too, and problem persists. Moreover, I can add that I have moved the project from one shared storage system to another to no avail. (The original storage location was on a drive mounted to a Win-tel system and the new location is on a UNIX-based NAS!)
Just rebuilt the file again and checked: Controls.Count = 62, so I am no where near the 255 control limit mentioned previously. This is indeed strange! (Not to mention furstrating!)

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