3/19/2023 0 Comments Xojo auto adjust tab order![]() Auto-Layout will, most of the time, just do the right thing. Each rule has one and they are set automatically, though you can override them, most users will likely never have to bother. When that happens, the engine will choose which rules to drop based on priorty. There may also be times when the Auto Layout engine can’t resolve all of your rules at runtime. There are several other optional rules that allow you to have even more control. When you drag and drop a control at one of the guidelines, the rules that set the control relative to the layout or other controls are created automatically. This distance could be wider or narrower depending on the platform. It’s Left value is “Standard Gap from Button1” meaning that it will stay the standard distance from Button1. Note that you can click on the images below to see them at full size.īutton3 on the other hand is set slightly differently. Instead of having to settle on a size that works for several platforms but is not best for each, Standard Height will automatically change to be exactly the right height for the given platform. For example, on the desktop buttons on Linux are taller than on OS X or Windows. This would allow the button to automatically use the right height based on the platform. And the Height is fixed at 37 points but it could also be set to Standard Height. The Top value, like the Left value, is set to Standard Margin as well. The width is fixed at 100 points but you could set it to auto-adjust the width based on the caption. In this case, Left is set to Standard Margin to keep it at just the right delta from the left side of the layout. The important difference is that these properties can do a whole lot more. In the Auto Layout section, Button1 has Left, Width, Top and Height just like the Position properties you have today. In this first example, Button1 is selected and in the Inspector you see an Auto Layout section rather than Locking and Position properties. There are many other rules to choose from, let’s look at a few examples: If those change over time or on other devices, that spacing can automatically adjust. This means it will use the right amount of space based on the UI guidelines for the platform. Instead of placing a control 20 points from the left edge of the layout, you can set the left value to be a “standard margin”. With Auto Layout you can set control positions and sizes to fixed values, but more often you use relative values or rules that define a control’s position and size. Instead of locking, you will use Auto Layout. We determined early in the development of our iOS framework that locking would not be sufficent for iOS since the user will often radically change the size of the layout by rotating the device. In Xojo today, you use the locking properties. In case the term Auto Layout is unfamilar to you, it’s a technology for controlling the size and postion of controls. However, at the time we only had support for it in the framework not the IDE. We demonstrated Auto Layout at XDC last year. Since the last update, we have been working on support for Auto Layout. We continue to work towards Xojo support for iOS.
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