Blog about the Xojo programming language and IDE
We are always keen to see apps and projects that Xojo developers have made for their Raspberry Pi 2 and Raspberry Pi 3 single-board computers. Especially since Xojo 2019r1 when building for Pi Desktop and Console is free with Xojo Pi!
I am pleased to announce some updates to our GPIO project to make it even easier to use more types of hardware in your Raspberry Pi projects.
Comments closedIntrospection is a very handy and useful part of the Xojo language.
You can use it to examine a lot of the objects that are in memory at runtime. You can access the properties in those objects, call methods on those objects and even create new instances (with some caveats here).
But there are limits to what you can do with it. You can’t use it to create things that do not exist at runtime because they’ve been stripped out when your app was built.
Comments closedWikipedia defines Code Refactoring as:
the process of restructuring existing computer code â changing the factoring â without changing its external behavior. Refactoring improves nonfunctional attributes of the software.
Did you know that Xojo has a bunch of refactoring features that can help make this process more efficient?
The TSA was recently in the news for paying tens of thousands of dollars for a seemingly simple iPad app to direct people to different security lines. Now we obviously don’t know everything the app does, but it sure seems like it would be pretty straightforward to make such an app, especially using Xojo.
Comments closedThe most direct way to support HiDPI* for custom controls is to draw into the Graphics object passed into the Paint event. That graphics object is already configured with the appropriate scale factor and double buffering- the entire control will be handled correctly by the framework if the DoubleBuffer property is set.
*As with other posts, we’ll use “HiDPI” to refer to both HiDPI on Windows and Retina on OS X.
2 CommentsJoin Paul as he talks with forum poster extradonaire, Michel Bujardet!
Comments closed“Retina” is the name for high resolution screens on Mac and iOS devices while “HiDPI” is the Windows equivalent. For simplicity, I’ll use HiDPI (which really is the universal technical term) for the rest of this blog post. Now that we have HiDPI support in Xojo, if you app doesn’t use any pictures, you can simply open your project, click on Shared under Build Settings and turn on the “Supports Retina/HiDPI” option. That’s all you need to do to have a HiDPI version of your app!
Having said that, if you are creating or using pictures in your project, there may be a few adjustments you’ll need to make to your code. A little over a year ago the process of making sure we had all of the necessary graphics together to build a Retina/HiDPI IDE was added to my to-do list. While 95% of the icons created for the Xojo IDE in 2013 already existed, most of the graphics that made up the IDE itself did not, and the IDE itself needed a bit of an overhaul to get it ready for the big change, both in graphics and in code…
2 CommentsIntrospection is a very handy and useful part of the Xojo language.
You can use Introspection to examine many of the objects that are in memory at runtime. You can access the properties in those objects, call methods on those objects and even create new instances- with some caveats of course.
Comments closedYou don’t need to hook up your Pi to a physical display, keyboard and mouse. You can set up VNC on the Pi so you can remotely connect to it.
My Raspberry Pi 2 sits on my desk next to one of my speakers. It’s not hooked up to any display. I use a combination of SSH, SFTP and VNC when I need to work with it.
Comments closedVisitors to Houston will find the city is served by 2 large, international airports (IAH & HOU), the restaurant scene is diverse and extensive, the city’s museums range from the acclaimed Children’s Museum to the beautiful Rothko Chapel, and the attractions of the surrounding area.
Comments closed