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We know how many items will be processed (), which holds the current percentage of processed items.

It is updated from the worker thread and is read from a timer on a form.

Instantiate the progress bar, with its optional title: Optionally, you can also update the ‘Caption’ property of the progress bar, so that the progress can be displayed both visually and as text: The main ‘gotcha’ that you are likely to encounter when using the Progress bar is that you will often be dealing with integer values when calculating progress – for example, fifty-five records processed out of a hundred.

Look what happens when we use these integers to calculate the progress: Why doesn’t the progress bar display correctly as it does here?

MAP_CB, UNMAP_CB, DESTROY_CB: common callbacks are supported.

In GTK uses Gtk Progress Bar, in Windows uses PROGRESS_CLASS, and in Motif uses xm Scale.

The ‘2.c’ example below shows a simpler way of accessing such shared variable – a TGp4Aligned Int record.

You can use any approach (TInterlocked or TGp4Aligned Int) with any multithreading library (PPL, OTL, or anything else).

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The Progress Bar class manages the current progress, and the format of the line is given by a number of widgets.

Set to NULL to allow the use of smaller values in the layout computation.

VALUE ( ACTIVE, EXPAND, FONT, SCREENPOSITION, POSITION, MINSIZE, MAXSIZE, WID, TIP, SIZE, ZORDER, VISIBLE, THEME: also accepted.

Hello all, I am having the following issue; the GUI I have built does not update when a standard C operation takes place.

I want to have a QProgress Bar that continuously moves (since I do not know how long it will take) until the file import is completed.

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