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app: draw fallback decorations on top

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Before this change, client-side decorations for Wayland were drawn
before client content, which was prevented from drawing over
decorations with a clip. While visually correct, resize handles would't
work as long as client listeners are near the window edges to swallow
pointer input.

This change makes app.Window draw decorations last, fixing resizing
and saves a clipping operation. This is an alternative to the original
fix for #361, commit 20d4bc2.

References: https://todo.sr.ht/~eliasnaur/gio/361
Signed-off-by: Elias Naur <mail@eliasnaur.com>
This commit is contained in:
Elias Naur
2022-06-23 13:41:34 +02:00
parent 6a6ddc3f19
commit e31aa35622
1 changed files with 16 additions and 14 deletions
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app/window.go
+16 -14
View File
@@ -25,7 +25,6 @@ import (
"gioui.org/io/system"
"gioui.org/layout"
"gioui.org/op"
"gioui.org/op/clip"
"gioui.org/unit"
"gioui.org/widget"
"gioui.org/widget/material"
@@ -818,18 +817,22 @@ func (w *Window) processEvent(d driver, e event.Event) bool {
w.queue.q.RevealFocus(viewport)
}
w.viewport = viewport
size := e2.Size // save the initial window size as the decorations will change it.
e2.FrameEvent.Size = w.decorate(d, e2.FrameEvent, wrapper)
viewSize := e2.Size
m := op.Record(wrapper)
size, offset := w.decorate(d, e2.FrameEvent, wrapper)
e2.FrameEvent.Size = size
deco := m.Stop()
w.out <- e2.FrameEvent
frame := w.waitFrame(d)
var signal chan<- struct{}
if frame != nil {
signal = w.frameAck
cl := clip.Rect{Max: e2.FrameEvent.Size}.Push(wrapper)
off := op.Offset(offset).Push(wrapper)
ops.AddCall(&wrapper.Internal, &frame.Internal, ops.PC{}, ops.PCFor(&frame.Internal))
cl.Pop()
off.Pop()
}
err := w.validateAndProcess(d, size, e2.Sync, wrapper, signal)
deco.Add(wrapper)
err := w.validateAndProcess(d, viewSize, e2.Sync, wrapper, signal)
if err != nil {
w.destroyGPU()
w.out <- system.DestroyEvent{Err: err}
@@ -942,9 +945,9 @@ func (w *Window) fallbackDecorate() bool {
}
// decorate the window if enabled and returns the corresponding Insets.
func (w *Window) decorate(d driver, e system.FrameEvent, o *op.Ops) image.Point {
func (w *Window) decorate(d driver, e system.FrameEvent, o *op.Ops) (size, offset image.Point) {
if !w.fallbackDecorate() {
return e.Size
return e.Size, image.Pt(0, 0)
}
theme := w.decorations.Theme
if theme == nil {
@@ -989,16 +992,15 @@ func (w *Window) decorate(d driver, e system.FrameEvent, o *op.Ops) image.Point
// Update the window based on the actions on the decorations.
w.Perform(deco.Actions())
// Offset to place the frame content below the decorations.
size := image.Point{Y: dims.Size.Y}
op.Offset(image.Pt(0, size.Y)).Add(o)
appSize := e.Size.Sub(size)
if w.decorations.size != size {
w.decorations.size = size
decoSize := image.Point{Y: dims.Size.Y}
appSize := e.Size.Sub(decoSize)
if w.decorations.size != decoSize {
w.decorations.size = decoSize
cnf := w.decorations.Config
cnf.Size = appSize
w.out <- ConfigEvent{Config: cnf}
}
return appSize
return appSize, image.Pt(0, decoSize.Y)
}
// Perform the actions on the window.