Split view

ui.Split lays out two panes side by side, with a divider between them that the user drags to resize them, or moves with the arrows once it has the keyboard focus: a *float32 is the width of the first, which the divider keeps 40 DIPs from either edge. Changed reports a move.

ui.Split(c, &app.sidebarWidth, func() { app.files(c) }, func() { app.editor(c) }).Fill()

ui.SplitVertical puts the first above the second, the *float32 its height:

ui.SplitVertical(c, &app.consoleHeight, func() { app.editor(c) }, func() { app.console(c) }).Grow(1)

Keep the size in the app's state, and save it to restore the layout when the app starts again. The pointer shows a resize cursor over the divider.

Accessibility

Assistive technology sees the divider as a splitter named "Divider", which takes the focus and moves with the arrows.