layout

Documentation

Index

• type Allocate
• type CustomLayout
  • func New(funcs Funcs) *CustomLayout
  • func (l *CustomLayout) SetForWidget(w gtk.Widgetter)
• type Funcs
• type MeasureFunc
• type RequestModeFunc

Examples

• CustomLayout

Types

type Allocate

type Allocate func(w gtk.Widgetter, width int, height int, baseline int)

Allocate is called to allocate the size of the widget.

type CustomLayout

type CustomLayout struct {
	// contains filtered or unexported fields
}

CustomLayout is a custom layout manager.

Example

layout := layout.New(layout.Funcs{
	RequestMode: func(w2 gtk.Widgetter) gtk.SizeRequestMode {
		return gtk.SizeRequestConstantSize
	},
	Measure: func(w2 gtk.Widgetter, orientation gtk.Orientation, forSize int) (
		minimum int,
		natural int,
		minimumBaseline int,
		naturalBaseline int,
	) {
		w := gtk.BaseWidget(w2)
		minimum, natural, minimumBaseline, naturalBaseline = w.Measure(orientation, forSize)
		if minimum < 100 {
			minimum = 100
		}
		return minimum, natural, minimumBaseline, naturalBaseline
	},
	Allocate: func(w2 gtk.Widgetter, width int, height int, baseline int) {
		w := gtk.BaseWidget(w2)
		w.Allocate(width, height, baseline, nil)
	},
})

label := gtk.NewLabel("Hello, world!")
layout.SetForWidget(label)

w := gtk.NewWindow()
w.SetChild(label)
w.Show()

func New

func New(funcs Funcs) *CustomLayout

New creates a new custom layout manager.

func (*CustomLayout) SetForWidget

func (l *CustomLayout) SetForWidget(w gtk.Widgetter)

SetForWidget sets the layout manager for the given widget. It handles the initialization of the layout manager for the widget.

type Funcs

type Funcs struct {
	RequestMode RequestModeFunc
	Measure     MeasureFunc
	Allocate    Allocate
}

Funcs is a box of functions for the layout manager.

type MeasureFunc

type MeasureFunc func(w gtk.Widgetter, orientation gtk.Orientation, forSize int) (
	minimum int,
	natural int,
	minimumBaseline int,
	naturalBaseline int)

Measure is called to measure the size of the widget.

type RequestModeFunc

type RequestModeFunc func(w gtk.Widgetter) gtk.SizeRequestMode

RequestModeFunc queries the widget for its preferred size request mode.