This took me < 2 min to set up and is just a simple Modbus demo. ComLink1 is a serial port connected to com3 in this case. The component has an auto option that allows it to always be connected that I use in this case. ModbusTable1 define parts of a Modbus map – in…
This shows the Standard Circular Gauge. Starting from left I only show the needle and add component by component – in this case by enabling a checkbox. Background is made half transparent, something all colors support. This is a standard Draw, Drop & Use gauge in case yoiu don’t want the extra fuzz of creating…
The last circular component I want to write about is the Slider – a circular slider. I will build Linear Gauge later and after that I want to do the Real Time Plot – all build component by component. A Circuar Slider is basically only a needle with a larger Inner-/Outer- Radius formed as a…
One of the challenges I have is that it is a big difference from making a library component and making a BSA supported component. Take Width/Hight/Center/Radius of a circular gauge as an example – this is straight forward in your own code, but doing the same on a visual designer is challenging because the visual…
As I now have some components that I can use to create a Gauge I also need a way to design the final API for that Gauge. Each component have a set of properties I want to access as a group, so I need an easee way to combine properties and add logic if needed.…
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…