mirror of
https://git.sr.ht/~eliasnaur/gio
synced 2026-07-01 15:45:38 +00:00
Elias Naur
108 lines
2.3 KiB
Go
108 lines
2.3 KiB
Go
// SPDX-License-Identifier: Unlicense OR MIT
|
|
|
|
/*
|
|
Package key implements key and text events and
|
|
operations.
|
|
|
|
The HandlerOp operations is used for declaring key
|
|
input handlers. Use the Queue interface from package
|
|
input to receive events.
|
|
*/
|
|
package key
|
|
|
|
import (
|
|
"gioui.org/ui"
|
|
"gioui.org/ui/input"
|
|
"gioui.org/ui/internal/opconst"
|
|
)
|
|
|
|
// HandlerOp declares a handler ready for key events.
|
|
// Key events are in general only delivered to the
|
|
// focused key handler. Set the Focus flag to request
|
|
// the focus.
|
|
type HandlerOp struct {
|
|
Key input.Key
|
|
Focus bool
|
|
}
|
|
|
|
// HideInputOp request that any on screen text input
|
|
// be hidden.
|
|
type HideInputOp struct{}
|
|
|
|
// FocusEvent is sent when a handler gains or loses
|
|
// focus.
|
|
type FocusEvent struct {
|
|
Focus bool
|
|
}
|
|
|
|
// Event is sent when a key is pressed. For text input
|
|
// use EditEvent.
|
|
type Event struct {
|
|
// Name is the rune character that most closely
|
|
// match the key. For letters, the upper case form
|
|
// is used.
|
|
Name rune
|
|
// Modifiers is the set of active modifiers when
|
|
// the key was pressed.
|
|
Modifiers Modifiers
|
|
}
|
|
|
|
// EditEvent is sent when text is input.
|
|
type EditEvent struct {
|
|
Text string
|
|
}
|
|
|
|
// Modifiers
|
|
type Modifiers uint32
|
|
|
|
const (
|
|
// ModCommand is the command modifier. On macOS
|
|
// it is the Cmd key, on other platforms the Ctrl
|
|
// key.
|
|
ModCommand Modifiers = 1 << iota
|
|
// THe shift key.
|
|
ModShift
|
|
)
|
|
|
|
const (
|
|
// Runes for special keys.
|
|
NameLeftArrow = '←'
|
|
NameRightArrow = '→'
|
|
NameUpArrow = '↑'
|
|
NameDownArrow = '↓'
|
|
NameReturn = '⏎'
|
|
NameEnter = '⌤'
|
|
NameEscape = '⎋'
|
|
NameHome = '⇱'
|
|
NameEnd = '⇲'
|
|
NameDeleteBackward = '⌫'
|
|
NameDeleteForward = '⌦'
|
|
NamePageUp = '⇞'
|
|
NamePageDown = '⇟'
|
|
)
|
|
|
|
// Contain reports whether m contains all modifiers
|
|
// in m2.
|
|
func (m Modifiers) Contain(m2 Modifiers) bool {
|
|
return m&m2 == m2
|
|
}
|
|
|
|
func (h HandlerOp) Add(o *ui.Ops) {
|
|
data := make([]byte, opconst.TypeKeyHandlerLen)
|
|
data[0] = byte(opconst.TypeKeyHandler)
|
|
if h.Focus {
|
|
data[1] = 1
|
|
}
|
|
o.Write(data, h.Key)
|
|
}
|
|
|
|
func (h HideInputOp) Add(o *ui.Ops) {
|
|
data := make([]byte, opconst.TypeHideInputLen)
|
|
data[0] = byte(opconst.TypeHideInput)
|
|
o.Write(data)
|
|
}
|
|
|
|
func (EditEvent) ImplementsEvent() {}
|
|
func (Event) ImplementsEvent() {}
|
|
func (FocusEvent) ImplementsEvent() {}
|