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Category: Raspberry Pi

Posts related to Raspberry Pi development.

Popovers for Xojo Desktop, Web and iOS

Starting with Xojo 2024r1 there’s a new Window type in Xojo’s UI/UX bag: Popovers. Popovers are kind of a Modal window with a more transient behavior and associated with a Parent control. A Popover will display the chosen content or layout, the same as when you design the user interface of a window or a Container control that will be included as part of another more complex design or displayed at runtime.

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Algorithm: Equally Spaced Ranges

There are some situations where you may need a range of numbers that is equally spaced. For example, when given a minimum and a maximum value within which a set of numbers that need to be equally spaced. This is useful if you are designing an UI control displaying “ticks” or for the axis of a graphic chart displaying cartesian values. Continue reading to see a technique to do just this.

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Quick Tip: Opening, Shown, Closing and Closed

Knowing the firing order of the Opening event in Xojo Desktop and Mobile apps, and the Shown event for Xojo Web apps, is important to using these correctly for a control’s initialization. The same can be said for Closing and Closed events. Read on for a breakdown of this order for Desktop, Web and Mobile apps developed in Xojo.

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PDFDocument Improvements

While PDFTable and PDFDataTableSource ease the way to render tables in your PDF documents on Desktop, Web, Raspberry Pi and Console projects (iOS to come!) and are the big new features for PDFDocument in Xojo 2022r3, that’s not all that improved. There are additional features added to PDFDocument you might find helpful such as more control while using PDFForm and improvements to dealing with TOC indexes. Learn more about how to get advantage of these additions!

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Using Emojis in Xojo

Xojo has very good graphics support. You can drop images into your project and use them with several controls. You can use the various Paint events to draw your own graphics. And there’s another source of graphics you may not have considered: emojis. Emojis can be used anywhere that text can be used because they are simply Unicode characters. That means they can be used in textfields, buttons, labels, popup menus, listboxes and more.

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