andlabs-ui/todo.md

so I don't forget:

• Window.SizeToFit() or WIndow.OptimalSize() (use: Window.SetOptimalSize())) for sizing a window to the control's interest
• Control.Show()/Control.Hide()
• Groupbox
• see if we really need to track errors on a lot of places that report errors
  • it appears GTK+ and Cocoa both either don't provide a convenient way to grab errors or you're not supposed to; I assume you're supposed to just assume everything works... but on Windows we check errors for functions that return errors, and there's no guarantee that only certian errors will be returned...
• character-limited entry fields, numeric entry fields, multiline entry fields
  • possible rename of LineEdit?
    • especially for password fields - NewPasswordEntry()?
• [Mac OS X] Listbox should have a border style
  • [Windows] a different border on LineEdits and Listboxes?
• padding and spacing in Stack
• allow Combobox to have initial settings
• Combobox and Listbox insertions and deletions should allow bulk (...string)
• Combobox/Listbox.DeleteAll
• Combobox/Listbox.Select (with Listbox.Select allowing bulk)
  • Checkbox.Check or Checkbox.SetChecked
• Listbox.SelectAll
• should Labels be selectable?
  • should message box text be selectable on all platforms or only on those that make it the default?
• Listbox/Combobox.Index(n)
  • Index(n) is the name used by reflect.Value; use a different one?
• change sysData.make() so it does not take the initial window text as an argument and instead have the respective Control/Window.make() call sysData.setText() expressly; this would allow me to remove the "no such concept of text" checks from the GTK+ and Mac OS X backends
• Message boxes should not show secondary text if none is specified.
• note that you can change event channels before opening the window; this allows unifying menus/toolbars/etc.
  • will probably want to bring back Event() for this (but as NewEvent())

important things:

• because the main event loop is not called if initialization fails, it is presently impossible for MsgBoxError() to work if UI initialization fails; this basically means we cannot allow initializiation to fail on Mac OS X if we want to be able to report UI init failures to the user with one (which would be desirable, maybe (would violate Windows HIG?))
• figure out where to auto-place windows in Cocoa (also window coordinates are still not flipped properly so (0,0) on screen is the bottom-left)
  • also provide a method to center windows; Cocoa provides one for us but
• I think Cocoa NSButton text is not vertically aligned properly...?
  • and listbox item text is too low?
• NSPopUpButton does allow no initial selection ([b setSelectedIndex:-1]); use it
  • need to use it /after/ adding initial items, otherwise it won't work
  • find out if I can do the same with the ListBoxes
• NSComboBox scans the entered text to see if it matches one of the items and returns the index of that item if it does; find out how to suppress this so that it returns -1 unless the item was chosen from the list (like the other platforms)
• some Cocoa controls don't seem to resize correctly: Buttons have space around the edges and don't satisfy stretchiness
• there's no GTK+ or Cocoa error handling whatsoever; we need to figure out how it works
  • I know how Cocoa error handling works: it uses Cocoa exceptions; need to figure out how to catch and handle them somehow
• make sure GTK+ documentation version point differences (x in 4.3.x) don't matter
• button sizes and LineEdit sizes on Windows seem too big; Comboboxes have margins
  • Cocoa has similar margining issues (like on Comboboxes)
• sometimes the size of the drop-down part of a Combobox becomes 0 or 1 or some other impossibly small value on Windows
• make gcc (Unix)/clang (Mac OS X) pedantic about warnings/errors; also -Werror
• make sure scrollbars in Listbox work identically on all platforms (specifically the existence and autohiding of both horizontal and vertical scrollbars)
  • pin down this behavior; also note non-editability
• the size of Listboxes on Windows does not fill the requested space completely (wait, wasn't there a style that governed this?)

super ultra important things:

• the windows build appears to be unstable:
  • 64-bit crashes in malloc in wine with heap corruption warnings aplenty during DLL loading; in windows 7 it works fine
  • 32-bit: it works, but if I save the class name converted to UTF-16 beforehand, wine indicates that the class name is replaced with the window title, so something there is wrong...
• handle in-library panics (internal errors) by reporting them to the user
• david wendt is telling me he's getting frequent crashes on his end with the GTK+ amd64 build... TODO re-evaluate; I think I fixed them all ages ago now
• occasionally I get panic: error sending message to message loop to call function: Invalid thread ID. when starting up the windows/386 build; race in ui()/msgloop()?
  • happens the first time I run a new build in wine; also if my computer is running too slowly when running in wine
• GTK+: stderr is flooded with

(test:17575): Gdk-CRITICAL **: gdk_device_ungrab: assertion 'GDK_IS_DEVICE (device)' failed

(test:17575): Gtk-CRITICAL **: gtk_device_grab_remove: assertion 'GDK_IS_DEVICE (device)' failed

figure out why
- I think it has to do with invalid list deletions; roll back the panics and check

• the user can still [NSApp terminate:] from the Dock icon, bypassing Go itself
  • ideally we need a QuitItem() function for this case if/when we add menus
• Cocoa: NSScrollView support is hacky at best
  • https://developer.apple.com/library/mac/documentation/cocoa/Conceptual/NSScrollViewGuide/Articles/Creating.html#//apple_ref/doc/uid/TP40003226-SW4 the warning about pixel alignment may or may not be heeded, not sure
  • frame sizes are a bit of a hack: the preferred size of a NSScrollView is the preferred size of its document view; the frameSize method described on the above link might be better but a real solution is optimal
• make sure the image drawn on an Area looks correct on all platforms (is not cropped incorrectly or blurred)
  • GTK+: requested clip rect seems to be larger than the size of the Area (also larger than the visible portion? TODO)
• when resizing a GTK+ window smaller than a certain size, the controls inside will start clipping in bizarre ways (progress bars/entry lines will just cut off; editable comboboxes will stretch slightly longer than noneditable ones; the horizontal scrollbar in Area will disappear smoothly; etc.)

important things:

• make specific wording in documentation consistent (make/create, etc.)
  • document minor details like wha thappens on specific events so that they are guaranteed to work the same on all platforms (are there any left?)
    • what happens when the user clicks and drags on a listbox
• make passing of parameters and type conversions of parameters to uitask on Windows consistent: explicit _WPARAM(xxx)/_LPARAM(xxx)/uintptr(xxx), for example
  • do this for type signatures in exported functions: (err error) or just error?
  • do this for the names of GTK+ helper functions (gtkXXX or gXXX)
• on windows 7, progress bars seem to animate from 0 -> pos when you turn off marquee mode and set pos; see if that's documented or if I'm doing something wrong
• clean up windows struct field names (holdover from when the intent was to make a wrapper lib first and then use it rather than using the windows API directly)

far off:

• localization
• strip unused constants from the Windows files
• combine more Windows files; rename some?
• tab stops

maybe:

• rename Stack to Box?
• make Combobox and Listbox satisfy sort.Interface?
• should a noneditable Combobox be allowed to return to unselected mode by the user?