When you add a control such as a PushButton to a Window (or a WebButton to a WebPage or an iOSButton to an iOSView), an instance of the control is created for you and added to the layout. Code that is in the event handlers of a control added in this way can refer to both its own properties and methods as well as the properties and methods of the window.
Comments closedAuthor: Paul Lefebvre
Here’s your first reminder: On January 14, 2020 Microsoft is ending support for Windows 7. We went through this a while ago when Windows XP reached end-of-life (no one really cared when Windows Vista reached end-of-life). Windows 7 was a very popular release as it was much better than Vista. It also didn’t help that Windows 8 was not liked at all with its many UI changes.
Comments closedIf you are using SQLite you might be trying to share your database. What are your options when you want to be able to share your database?
Comments closedGitHub just announced that private repositories are now free. GitHub has been a great source for Xojo open-source projects, so being able to also use it for private repositories is a nice bonus.
Comments closedXojo 2018 Release 4 updated SQLite to 3.25. The SQLite 3.25 release had two significant changes: Window Functions and an improved ALTER TABLE command.
Comments closedWith Xojo 2018 Release 4, we updated the macOS SDK to 10.14. This means that App Transport Security is now something you need to be aware of for your Mac apps.
Comments closedPrior to Xojo 2018r3 Window and Canvas both had a Graphics property that you could access and draw to. This was deprecated in 2011 because it had significant performance issues on all platforms. The preferred way to draw your graphics since 2011 has been to use the Window.Paint or Canvas.Paint event handlers and the supplied parameter g As Graphics.
Starting with Xojo 2018r3, this Graphics property was removed from Window and Canvas so if you had code that was still relying on it, that code will no longer compile. Here are some tips on how you can migrate your code to use the Paint event handlers and tell the Canvas to update with a call to Invalidate.
Comments closedDecember 3rd kicks off Computer Science Education Week 2018! Computer Science Education Week is held in early December every year in recognition of the birthday of computing pioneer Admiral Grace Hopper. Alongside this is the Hour of Code promotion where schools throughout the world get students to try at least 1 hour of programming at some point during the week.
Each year for Hour of Code, I volunteer at the local Middle School to talk to the students about what it is like to be a programmer and do a little bit of programming. This year I plan to demonstrate Xojo Dojo with a Raspberry Pi and show the kids how much fun coding and Xojo programming can be.
Comments closedThe Canvas control is a great way to draw pretty much anything to a window. With a Canvas, do all your drawing in its Paint event handler for the best quality and performance.
I’ve had many people ask for an example for how to create a Canvas that allows you to:
- Draw pictures within it (as objects)
- Move these objects
- Remove them
- Add labels to them
- Programmatically select one
This example demonstrates how to do all these things. It has a large Canvas on the window with several buttons that let you add and manage the objects on the Canvas.
Comments closedWith the availability of Xojo 2018 Release 3, Xojo now supports macOS Mojave’s new dark mode. This means you can update your own apps to support dark mode and it also means that the Xojo IDE works in dark mode.
Comments closed