Instead of
type Contraints struct {
Width, Height Constraint
}
use
type Constraints struct {
Min, Max image.Point
}
which leads to simpler use. For example, the Min method is trivally replaced by
the field, and the RigidConstraints constructor is no longer a net win.
API Change. Rewrites:
gofmt -r 'gtx.Constraints.Min() -> gtx.Constraints.Min'
gofmt -r 'gtx.Constraints.Width.Min -> gtx.Constraints.Min.X'
gofmt -r 'gtx.Constraints.Height.Min -> gtx.Constraints.Min.Y'
gofmt -r 'gtx.Constraints.Height.Max -> gtx.Constraints.Max.Y'
gofmt -r 'gtx.Constraints.Width.Max -> gtx.Constraints.Max.X'
Signed-off-by: Elias Naur <mail@eliasnaur.com>
The multitude of widget methods on Theme is unnecessary coupling in that all
possible widgets either have to be included in package material, or be
different than 3rd party widgets:
var th *Theme
// Core widget, calling a method on Theme.
th.Button(...).Layout(...)
// 3rd party widget, calling a function taking a Theme.
datepicker.New(th, ...).Layout(...)
Another reason for the Theme methods was to enable a poor man's
theme replacement, so that you could use the same code for
compatible themes. For example,
mat.Button(...).Layout(...)
would not need to change if the type of mat changed, as long as
the new type had a compatible method Button.
However, that point misses the fact that the mat variable had to
be declared somewhere, naming the theme package:
var mat *material.Theme (or, say, *cocoa.Theme)
A better and complete way to replace a theme is to use import renaming.
For example, to replace the material theme with a hypothetical Windows
theme, replace
import theme "gioui.org/widget/material"
with
import theme "github.com/somebody/windows
This change moves all Theme widget methods to be standalone functions,
and renames the widget style types accordingly.
For example, instead of the method
func (t *Theme) Button(...) Button
there is now a function
func Button(t *Theme, ...) ButtonStyle
Signed-off-by: Elias Naur <mail@eliasnaur.com>
Elias Naur