In a classic circular gauge we often use a needle to indicate current value. To draw this you have two options – (1) you can compute cartesian coordinates or (2) you can just draw the needle and rotate it – I used the later trick in this example. I have no idea what is the…
Some of you will remember my idea to use a grid to enter components one by one and then showing the result at top. Having tested that option a bit I decided against it. I found that just using the normal designer stacking the components on top of eachother was easier. At the end you…
Labels are equally easy – just use the same center and compute cartesian coordinates for the positions you want labels on. But, as you can see from the example below I get an additional issue. I used the coordinates as the upper, left corner and labels at left comes closer than labels at right etc.…
The second component is ticks. This just show degrees with every 10th degree as Major and every 2nd as Minor. Drawing ticks are straight forward using a Canvas as background. This is where I find WPF a bit confusing because my Pie had to be done on a Shape to get access to the Arc…
A common mistake then reprecenting pixel positions is to use Integers. This is how we did things back in the 80’s and 90’s, but GPU’s use double and pixel 1.5 actually exist. As the GPU smooth lines it will add shades to make it look as if we have pixels between pixels. If your coordinate…
The reason I don’t want to copy pre-made gauges is because I want to create the gauge layer by layer and then have the option to stack whatever Gauge I want. WPF provide a few graphic shapes like Ellipse, Line and Rectangle, but the rest you need to add yourself. This one is a Pie.…
Working on BSA I have been through a lot of work to style common controls in WPF and QML to make SDK’s I can use as I generate code. Most of this work was doing the designer part in BSA, but in some cases I also had to create the controls themselves from scratch. Starting…
This ModbusTable is only 100 entries and behaving very nice due to a trick where I only load row details if the row is expanded.That trick will allow me to create tables up to ca 300 entries and still have decent behavior, but it is no solution for very large tables. So I will need …
I am very pleased with how I integrated Modbus as far as the result goes, but it has been a bit of hand-tailoring inside BSA – I am not so happy with the later because that is not a generic solution. So I need to find a way to create user controls the same way.…
This shows BSA with a 64 register ModbusTable. You will recall that I had some performance problems earlier with loading large tables into my property editor. This one takes ca 5 seconds to load, so it is getting very annoying to work with. The reason for this is because I load ca 1216 user controls…