13 Feb

Adding drag handles to an ImageBox to allow resizing of selection regions

The ImageBox control is already a versatile little control and I use it for all sorts of tasks. One of the features I recently wanted was to allow users to be able to select a source region, then adjust this as needed. The control already allows you to draw a selection region, but if you need to adjust that ... well, you can't. You can only draw a new region.

This article describes how to extend the ImageBox to include the ability to resize the selection region. A older demonstration which shows how to drag the selection around has also been incorporated, in a more tidy fashion than the demo.

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11 Jan

Loading the color palette from a BBM/LBM image file using C#

I took a break from arguing with our GIF decoder to take a quick look at the BBM format as I have a few files in that format containing colour palettes I wished to extract. When I looked into this, I found a BBM file is essentially an LBM file without any image data, so I set to work at writing a new palette serializer for reading and writing the palette files. This article describes how to read the palettes from BBM and LBM files.

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31 Dec 2013

Tools we use - 2013 edition

As another year enters its final stages, I decided I would log the primary tools I use for my developer role, should be an interesting experiment to compare with each year, if I don't get distracted by something shiny.

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29 Dec 2013

How to be notified when your application is activated and deactivated

I recently had a requirement where a user was able to perform an action externally to my application, and my application then had to detect this for processing.

I could of course just had a poller running away in the background to check, but as the requirement also needed user input, why not just wait until the user switched back to my application, then check and deal with accordingly?

This article describes how to intercept the WM_ACTIVATEAPP message from your C# application and put it to good use.

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