5cddc1460e
Config provides a way to concurrently access Width and Height. Register provides a way for packages to run code on app state change without plumbing changes all the way to the process main function. This is motivated by gl/glutil.Image which needs to rebuild its textures on start/stop and can be deeply nested. (See golang.org/cl/9707 for the followup.) Tested manually on android and darwin/amd64. Doing this kind makes it clear any CL modifying this code needs a lot of manual testing right now, so some kind of trybot support is something I'm going to prioritise. Fixes golang/go#10686 Fixes golang/go#10461 Fixes golang/go#10442 Fixes golang/go#10226 Updates golang/go#10327 Change-Id: I2882ebf3995b6ed857cda823e94fbb17c54b43a8 Reviewed-on: https://go-review.googlesource.com/9708 Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
109 lines
2.1 KiB
Go
109 lines
2.1 KiB
Go
// Copyright 2014 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build linux,!android
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package app
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/*
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Simple on-screen app debugging for X11. Not an officially supported
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development target for apps, as screens with mice are very different
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than screens with touch panels.
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On Ubuntu 14.04 'Trusty', you may have to install these libraries:
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sudo apt-get install libegl1-mesa-dev libgles2-mesa-dev libx11-dev
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*/
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/*
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#cgo LDFLAGS: -lEGL -lGLESv2 -lX11
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void runApp(void);
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*/
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import "C"
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import (
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"runtime"
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"sync"
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"golang.org/x/mobile/event"
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"golang.org/x/mobile/geom"
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)
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var callbacks []Callbacks
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func run(cbs []Callbacks) {
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runtime.LockOSThread()
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callbacks = cbs
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C.runApp()
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}
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//export onResize
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func onResize(w, h int) {
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// TODO(nigeltao): don't assume 72 DPI. DisplayWidth / DisplayWidthMM
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// is probably the best place to start looking.
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if geom.PixelsPerPt == 0 {
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geom.PixelsPerPt = 1
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}
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configAlt.Width = geom.Pt(w)
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configAlt.Height = geom.Pt(h)
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configSwap(callbacks)
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}
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var touchEvents struct {
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sync.Mutex
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pending []event.Touch
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}
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func sendTouch(ty event.TouchType, x, y float32) {
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touchEvents.Lock()
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touchEvents.pending = append(touchEvents.pending, event.Touch{
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ID: 0,
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Type: ty,
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Loc: geom.Point{
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X: geom.Pt(x / geom.PixelsPerPt),
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Y: geom.Height - geom.Pt(y/geom.PixelsPerPt),
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},
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})
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touchEvents.Unlock()
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}
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//export onTouchStart
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func onTouchStart(x, y float32) { sendTouch(event.TouchStart, x, y) }
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//export onTouchMove
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func onTouchMove(x, y float32) { sendTouch(event.TouchMove, x, y) }
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//export onTouchEnd
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func onTouchEnd(x, y float32) { sendTouch(event.TouchEnd, x, y) }
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//export onDraw
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func onDraw() {
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touchEvents.Lock()
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pending := touchEvents.pending
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touchEvents.pending = nil
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touchEvents.Unlock()
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for _, cb := range callbacks {
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if cb.Touch != nil {
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for _, e := range pending {
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cb.Touch(e)
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}
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}
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}
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for _, cb := range callbacks {
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if cb.Draw != nil {
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cb.Draw()
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}
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}
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}
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//export onStart
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func onStart() {
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stateInit(callbacks)
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}
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//export onStop
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func onStop() {
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stateStop(callbacks)
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}
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