Skip to main content

Displaying a Progress bar that doesn't affect your program

I have been really intrigued by the MTmyVFP project on Codeplex - primarily because I want my FoxPro apps to be as efficient as possible and to run in the background where possible but one of my pet peeves in a recent application is that if I'm doing some heavy work and want to display an animation (similar to the Copy files that you see in Windows), the animation really gets bogged down with the processing.

As a result, it looks funky to the user. I had asked Claude Fox if MTmyVFP could be used to do this - and the answer was to make my processing code run in the background and then make the animation run in the main application thread.

That wasn't doable but it made me think: what if I had an application that could show the animation and then I would just call it when needed.

Here's how I did it in VFP:


oForm = .NULL.

PROCEDURE Show (tcTitle,tcAvi)

THIS.oForm = CREATEOBJECT("frmanimation",tcTitle,tcAvi)







DEFINE CLASS frmanimation AS form

Height = 106

Width = 377

ShowWindow = 2

DoCreate = .T.

AutoCenter = .T.

Caption = "Working"

ControlBox = .F.

AlwaysOnTop = .T.

Name = "frmAnimation"

LPARAMETERS tcTitle, tcFile

IF EMPTY(tcTitle)
tcTitle = ""

THIS.Caption = tcTitle
IF EMPTY(tcFile)
tcFile = "filemove.avi"
llRet = .T.
lcErr = ON("ERROR")
ON ERROR llRet = .F.
IF FILE(tcFile)
on error &lcErr

PROCEDURE AddAnimation
.Top = 3
.Left = 0
.Height = 100
.Width = 372
.Visible = .T.
LPARAMETERS nError, cMethod, nLine

** Ignore it

*-- EndDefine: frmanimation

Then build the code as an EXE. I called mine THERM.

Now, whenever you need to show a thermometer, you can call

lo = CREATEOBJECT("Therm.oani")

(hint: you can find AVI files in the VFP Home Directory under Graphics\Videos.)

Your progress bar will appear right in the middle of the screen.  Now when you need to close it, just call:


You can take this even further by changing the form details with THIS.oForm.Caption, etc, etc.

The only downside here is that you HAVE to register your EXE so you can instantiate it but you can do that easily simply by running it once with a REGSERVER.

Now, of course, there is a GOTCHA and that is that if you run this class, you may notice a weird transparent background every now and then.

The solution? Forget using a non-visual class. Instead, create a form with the same code and drop the control on it to begin with.

For good measure, set the Center property of the Animation control to .T.

Then you're even BETTER to go.

So in my class, instead of doing the CREATEOBJECT, I simply call

PROCEDURE Show (tcTitle,tcAvi)

DO FORM DispAni WITH tcTitle,tcAVI NAME THIS.oForm


The end result is a much smoother animation while your application does all its work.

Powered by ScribeFire.


Unknown said…
I did something similar a while back, but I used a free table to store the progress state. In my processing application, I would simply update the values in the table, there was no need for the programs to interact.

create table status ( ;
title c(50), message c(100), ;
percent n(3,0), paused l, cancelled l ;
append blank

The progress app contained a pause button which would lock the single record table and a cancel button.
Andrew MacNeill said…
Cool idea, Brian.

In my case, I didn't want to show a Thermometer persay but rather the animation (maybe I should have changed the title of my post).

We already have a thermometer showing at the bottom of the screen which updates every 200 records.

But that's definitely a useful approach as well.
Unknown said…
I was eventually planning on sticking the progress application in the system tray, never got the time to do it.

The last time I tried putting an application in the system tray (using VFP8 and Binding) it was so buggy that I ditched the idea.

I'm hoping that VFP9 has better support for this sort of thing. Alternatively, a C# or VB app that uses ODBC to read the status.dbf table would probably be easier to stick in the system tray.
Anonymous said…
The Ole control seem to run unly file from disk.

I've tried to run the AVI file that were include in my Project without success.

Any tips?

Popular posts from this blog

Well, that explains CodePlex...

In a move that will be sure to anger open source (or rather anti-paid software, anti-Microsoft open source)  zealots, Microsoft is planning to buy GitHub . A year ago, I mused about why Microsoft would shut down CodePlex and how the world needs competing source code repositories to be strong. I'm not the only one per this Slashdot article  : "...   people have warned about GitHub becoming as large as it did as problematic because it concentrates too much of the power to make or break the open source world in a single entity, moreso because there were valid questions about GitHubs financial viability...." - Jacques Mattheij I will be interested in seeing this play out - whether developers jump ship or not. Have all the efforts Microsoft has made in pushing towards open source be seen as genuine or will all the zealots jump ship or maybe even attack? Microsoft's comment about why they shut down CodePlex referred to how spammers were using CodePlex. Well, GitHub

Attending Southwest Fox 2019 could change your life - Find out how

Southwest Fox is coming up in October and as I do every year, I spoke with the organizers Rick , Doug and Tamar on the FoxShow. Deadlines for Southwest Fox: Super-saver price (before July 1): $695 Early-bird price (before August 1): $770 Regular price (August 1 and later): $820 This year, I took a different approach with separate shows for each organizer but the main message is still the same : July 1st is their Go/No-Go date. Conferences don't talk about this very often. I don't think developers really question if Apple will hold their WWDC in June or Microsoft will hold their Build conference - but that's because those conferences are vendor-led. Southwest Fox is a community-driven conference - it's not driven by a company with an agenda. Listen to the interviews and you can hear how important each of the organizers feel the live connection between speakers and among attendees.

eero icons - What the heck?

How to change icons used by eero.... Formerly titled: Eero router - Nicknames and icons UPDATE: Finally!!!! The most recent update to the eero now allows you to specify icons from their library. And it's a GOOD library - thank you. Finally! If you've extended your wireless network using eero , you have downloaded the app. I upgraded my network when I noticed a bunch of dead spots in what should have been a fairly reasonable coverage space (1700 sqft home). With two eero devices, our home is pretty well covered. Click on Connected devices and every device connected to your network is displayed. The eero app identifies the manufacturer and, with some devices, even the name of a given device. The eero app may also show an icon that represents its use. Some of the more obvious icons are those for phones, laptops and TVs. Unfortunately, the majority of devices get a fairly generic "wifi" icon. But you can change this. Give devices a nickname using ce