forked from fyne-io/fyne
/
driver.go
414 lines (354 loc) · 10.6 KB
/
driver.go
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package gomobile
import (
"runtime"
"strconv"
"time"
"fyne.io/fyne"
"fyne.io/fyne/canvas"
"fyne.io/fyne/internal"
"fyne.io/fyne/internal/driver"
"fyne.io/fyne/internal/painter"
pgl "fyne.io/fyne/internal/painter/gl"
"fyne.io/fyne/theme"
"fyne.io/fyne/widget"
"github.com/fyne-io/mobile/app"
"github.com/fyne-io/mobile/event/key"
"github.com/fyne-io/mobile/event/lifecycle"
"github.com/fyne-io/mobile/event/paint"
"github.com/fyne-io/mobile/event/size"
"github.com/fyne-io/mobile/event/touch"
"github.com/fyne-io/mobile/gl"
)
const tapSecondaryDelay = 300 * time.Millisecond
type mobileDriver struct {
app app.App
glctx gl.Context
windows []fyne.Window
device *device
}
// Declare conformity with Driver
var _ fyne.Driver = (*mobileDriver)(nil)
func init() {
runtime.LockOSThread()
}
func (d *mobileDriver) CreateWindow(title string) fyne.Window {
c := NewCanvas().(*mobileCanvas) // silence lint
ret := &window{title: title, canvas: c, isChild: len(d.windows) > 0}
c.content = &canvas.Rectangle{FillColor: theme.BackgroundColor()}
c.painter = pgl.NewPainter(c, ret)
d.windows = append(d.windows, ret)
return ret
}
func (d *mobileDriver) AllWindows() []fyne.Window {
return d.windows
}
// currentWindow returns the most recently opened window - we can only show one at a time.
func (d *mobileDriver) currentWindow() fyne.Window {
if len(d.windows) == 0 {
return nil
}
return d.windows[len(d.windows)-1]
}
func (d *mobileDriver) RenderedTextSize(text string, size int, style fyne.TextStyle) fyne.Size {
return painter.RenderedTextSize(text, size, style)
}
func (d *mobileDriver) CanvasForObject(fyne.CanvasObject) fyne.Canvas {
if len(d.windows) == 0 {
return nil
}
// TODO figure out how we handle multiple windows...
return d.currentWindow().Canvas()
}
func (d *mobileDriver) AbsolutePositionForObject(co fyne.CanvasObject) fyne.Position {
c := d.CanvasForObject(co)
if c == nil {
return fyne.NewPos(0, 0)
}
mc := c.(*mobileCanvas)
return driver.AbsolutePositionForObject(co, mc.objectTrees())
}
func (d *mobileDriver) Quit() {
// Android and iOS guidelines say this should not be allowed!
}
func (d *mobileDriver) Run() {
app.Main(func(a app.App) {
d.app = a
var currentSize size.Event
for e := range a.Events() {
current := d.currentWindow()
if current == nil {
continue
}
canvas := current.Canvas().(*mobileCanvas)
switch e := a.Filter(e).(type) {
case lifecycle.Event:
switch e.Crosses(lifecycle.StageVisible) {
case lifecycle.CrossOn:
d.glctx, _ = e.DrawContext.(gl.Context)
d.onStart()
// this is a fix for some android phone to prevent the app from being drawn as a blank screen after being pushed in the background
canvas.Content().Refresh()
a.Send(paint.Event{})
case lifecycle.CrossOff:
d.onStop()
d.glctx = nil
}
case size.Event:
if e.WidthPx <= 0 {
continue
}
currentSize = e
currentOrientation = e.Orientation
currentDPI = e.PixelsPerPt * 72
dev := d.device
dev.insetTop = e.InsetTopPx
dev.insetBottom = e.InsetBottomPx
dev.insetLeft = e.InsetLeftPx
dev.insetRight = e.InsetRightPx
canvas.SetScale(0) // value is ignored
// make sure that we paint on the next frame
canvas.Content().Refresh()
case paint.Event:
if d.glctx == nil || e.External {
continue
}
if !canvas.inited {
canvas.inited = true
canvas.painter.Init() // we cannot init until the context is set above
}
if d.freeDirtyTextures(canvas) {
newSize := fyne.NewSize(int(float32(currentSize.WidthPx)/canvas.scale), int(float32(currentSize.HeightPx)/canvas.scale))
if canvas.minSizeChanged() {
canvas.ensureMinSize()
canvas.sizeContent(newSize) // force resize of content
} else { // if screen changed
current.Resize(newSize)
}
d.paintWindow(current, newSize)
a.Publish()
}
time.Sleep(time.Millisecond * 10)
a.Send(paint.Event{})
case touch.Event:
switch e.Type {
case touch.TypeBegin:
d.tapDownCanvas(canvas, e.X, e.Y, e.Sequence)
case touch.TypeMove:
d.tapMoveCanvas(canvas, e.X, e.Y, e.Sequence)
case touch.TypeEnd:
d.tapUpCanvas(canvas, e.X, e.Y, e.Sequence)
}
case key.Event:
if e.Direction == key.DirPress {
d.typeDownCanvas(canvas, e.Rune, e.Code)
} else if e.Direction == key.DirRelease {
d.typeUpCanvas(canvas, e.Rune, e.Code)
}
}
}
})
}
func (d *mobileDriver) onStart() {
}
func (d *mobileDriver) onStop() {
}
func (d *mobileDriver) paintWindow(window fyne.Window, size fyne.Size) {
canvas := window.Canvas().(*mobileCanvas)
r, g, b, a := theme.BackgroundColor().RGBA()
max16bit := float32(255 * 255)
d.glctx.ClearColor(float32(r)/max16bit, float32(g)/max16bit, float32(b)/max16bit, float32(a)/max16bit)
d.glctx.Clear(gl.COLOR_BUFFER_BIT)
paint := func(obj fyne.CanvasObject, pos fyne.Position, _ fyne.Position, _ fyne.Size) bool {
// TODO should this be somehow not scroll container specific?
if _, ok := obj.(*widget.ScrollContainer); ok {
canvas.painter.StartClipping(
fyne.NewPos(pos.X, canvas.Size().Height-pos.Y-obj.Size().Height),
obj.Size(),
)
}
canvas.painter.Paint(obj, pos, size)
return false
}
afterPaint := func(obj, _ fyne.CanvasObject) {
if _, ok := obj.(*widget.ScrollContainer); ok {
canvas.painter.StopClipping()
}
}
canvas.walkTree(paint, afterPaint)
}
func (d *mobileDriver) tapDownCanvas(canvas *mobileCanvas, x, y float32, tapID touch.Sequence) {
tapX := internal.UnscaleInt(canvas, int(x))
tapY := internal.UnscaleInt(canvas, int(y))
pos := fyne.NewPos(tapX, tapY)
canvas.tapDown(pos, int(tapID))
}
func (d *mobileDriver) tapMoveCanvas(canvas *mobileCanvas, x, y float32, tapID touch.Sequence) {
tapX := internal.UnscaleInt(canvas, int(x))
tapY := internal.UnscaleInt(canvas, int(y))
pos := fyne.NewPos(tapX, tapY)
canvas.tapMove(pos, int(tapID), func(wid fyne.Draggable, ev *fyne.DragEvent) {
go wid.Dragged(ev)
})
}
func (d *mobileDriver) tapUpCanvas(canvas *mobileCanvas, x, y float32, tapID touch.Sequence) {
tapX := internal.UnscaleInt(canvas, int(x))
tapY := internal.UnscaleInt(canvas, int(y))
pos := fyne.NewPos(tapX, tapY)
canvas.tapUp(pos, int(tapID), func(wid fyne.Tappable, ev *fyne.PointEvent) {
go wid.Tapped(ev)
}, func(wid fyne.SecondaryTappable, ev *fyne.PointEvent) {
go wid.TappedSecondary(ev)
}, func(wid fyne.DoubleTappable, ev *fyne.PointEvent) {
go wid.DoubleTapped(ev)
}, func(wid fyne.Draggable, ev *fyne.DragEvent) {
go wid.DragEnd()
})
}
var keyCodeMap = map[key.Code]fyne.KeyName{
// non-printable
key.CodeEscape: fyne.KeyEscape,
key.CodeReturnEnter: fyne.KeyReturn,
key.CodeTab: fyne.KeyTab,
key.CodeDeleteBackspace: fyne.KeyBackspace,
key.CodeInsert: fyne.KeyInsert,
key.CodePageUp: fyne.KeyPageUp,
key.CodePageDown: fyne.KeyPageDown,
key.CodeHome: fyne.KeyHome,
key.CodeEnd: fyne.KeyEnd,
key.CodeF1: fyne.KeyF1,
key.CodeF2: fyne.KeyF2,
key.CodeF3: fyne.KeyF3,
key.CodeF4: fyne.KeyF4,
key.CodeF5: fyne.KeyF5,
key.CodeF6: fyne.KeyF6,
key.CodeF7: fyne.KeyF7,
key.CodeF8: fyne.KeyF8,
key.CodeF9: fyne.KeyF9,
key.CodeF10: fyne.KeyF10,
key.CodeF11: fyne.KeyF11,
key.CodeF12: fyne.KeyF12,
key.CodeKeypadEnter: fyne.KeyEnter,
// printable
key.CodeA: fyne.KeyA,
key.CodeB: fyne.KeyB,
key.CodeC: fyne.KeyC,
key.CodeD: fyne.KeyD,
key.CodeE: fyne.KeyE,
key.CodeF: fyne.KeyF,
key.CodeG: fyne.KeyG,
key.CodeH: fyne.KeyH,
key.CodeI: fyne.KeyI,
key.CodeJ: fyne.KeyJ,
key.CodeK: fyne.KeyK,
key.CodeL: fyne.KeyL,
key.CodeM: fyne.KeyM,
key.CodeN: fyne.KeyN,
key.CodeO: fyne.KeyO,
key.CodeP: fyne.KeyP,
key.CodeQ: fyne.KeyQ,
key.CodeR: fyne.KeyR,
key.CodeS: fyne.KeyS,
key.CodeT: fyne.KeyT,
key.CodeU: fyne.KeyU,
key.CodeV: fyne.KeyV,
key.CodeW: fyne.KeyW,
key.CodeX: fyne.KeyX,
key.CodeY: fyne.KeyY,
key.CodeZ: fyne.KeyZ,
key.Code0: fyne.Key0,
key.CodeKeypad0: fyne.Key0,
key.Code1: fyne.Key1,
key.CodeKeypad1: fyne.Key1,
key.Code2: fyne.Key2,
key.CodeKeypad2: fyne.Key2,
key.Code3: fyne.Key3,
key.CodeKeypad3: fyne.Key3,
key.Code4: fyne.Key4,
key.CodeKeypad4: fyne.Key4,
key.Code5: fyne.Key5,
key.CodeKeypad5: fyne.Key5,
key.Code6: fyne.Key6,
key.CodeKeypad6: fyne.Key6,
key.Code7: fyne.Key7,
key.CodeKeypad7: fyne.Key7,
key.Code8: fyne.Key8,
key.CodeKeypad8: fyne.Key8,
key.Code9: fyne.Key9,
key.CodeKeypad9: fyne.Key9,
key.CodeSemicolon: fyne.KeySemicolon,
key.CodeEqualSign: fyne.KeyEqual,
key.CodeSpacebar: fyne.KeySpace,
key.CodeApostrophe: fyne.KeyApostrophe,
key.CodeComma: fyne.KeyComma,
key.CodeHyphenMinus: fyne.KeyMinus,
key.CodeKeypadHyphenMinus: fyne.KeyMinus,
key.CodeFullStop: fyne.KeyPeriod,
key.CodeKeypadFullStop: fyne.KeyPeriod,
key.CodeSlash: fyne.KeySlash,
key.CodeLeftSquareBracket: fyne.KeyLeftBracket,
key.CodeBackslash: fyne.KeyBackslash,
key.CodeRightSquareBracket: fyne.KeyRightBracket,
key.CodeGraveAccent: fyne.KeyBackTick,
}
func keyToName(code key.Code) fyne.KeyName {
ret, ok := keyCodeMap[code]
if !ok {
return ""
}
return ret
}
func runeToPrintable(r rune) rune {
if strconv.IsPrint(r) {
return r
}
return 0
}
func (d *mobileDriver) typeDownCanvas(canvas *mobileCanvas, r rune, code key.Code) {
keyName := keyToName(code)
r = runeToPrintable(r)
keyEvent := &fyne.KeyEvent{Name: keyName}
if canvas.Focused() != nil {
if keyName != "" {
canvas.Focused().TypedKey(keyEvent)
}
if r > 0 {
canvas.Focused().TypedRune(r)
}
} else if canvas.onTypedKey != nil {
if keyName != "" {
canvas.onTypedKey(keyEvent)
}
if r > 0 {
canvas.onTypedRune(r)
}
}
}
func (d *mobileDriver) typeUpCanvas(canvas *mobileCanvas, r rune, code key.Code) {
}
func (d *mobileDriver) freeDirtyTextures(canvas *mobileCanvas) bool {
freed := false
for {
select {
case object := <-canvas.refreshQueue:
freed = true
freeWalked := func(obj fyne.CanvasObject, _ fyne.Position, _ fyne.Position, _ fyne.Size) bool {
canvas.painter.Free(obj)
return false
}
driver.WalkCompleteObjectTree(object, freeWalked, nil)
default:
return freed
}
}
}
func (d *mobileDriver) Device() fyne.Device {
if d.device == nil {
d.device = &device{}
}
return d.device
}
// NewGoMobileDriver sets up a new Driver instance implemented using the Go
// Mobile extension and OpenGL bindings.
func NewGoMobileDriver() fyne.Driver {
return new(mobileDriver)
}