ref: b61213d33be35446f1fff9efcb83adbb3eaf4d54
dir: /browser/duitx/place.go/
package duitx
// Original code from github.com/mjl-/duit
//
// Copyright 2018 Mechiel Lukkien mechiel@ueber.net
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of this
// software and associated documentation files (the "Software"), to deal in the Software
// without restriction, including without limitation the rights to use, copy, modify, merge,
// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
// to whom the Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all copies or
// substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
// PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
// SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
import (
"image"
"9fans.net/go/draw"
"github.com/mjl-/duit"
"github.com/psilva261/opossum/logger"
)
// Place contains other UIs it can position absolute, possibly on top of each other.
type Place struct {
// Place is called during layout. It must configure Kids, and set self.R, based on sizeAvail.
Place func(self *duit.Kid, sizeAvail image.Point) `json:"-"`
Kids []*duit.Kid // Kids to draw, set by the Place function.
Background *draw.Image `json:"-"` // For background color.
kidsReversed []*duit.Kid
size image.Point
img *draw.Image
force bool
}
var _ duit.UI = &Place{}
func (ui *Place) ensure() {
if len(ui.kidsReversed) == len(ui.Kids) {
return
}
ui.kidsReversed = make([]*duit.Kid, len(ui.Kids))
for i, k := range ui.Kids {
ui.kidsReversed[len(ui.Kids)-1-i] = k
}
}
func (ui *Place) Layout(dui *duit.DUI, self *duit.Kid, sizeAvail image.Point, force bool) {
ui.ensure()
debugLayout(dui, self)
ui.Place(self, sizeAvail)
}
func (ui *Place) Draw(dui *duit.DUI, self *duit.Kid, img *draw.Image, orig image.Point, m draw.Mouse, force bool) {
if self.Draw == duit.Clean {
return
}
self.Draw = duit.Clean
if ui.img == nil || ui.Kids[0].R.Size() != ui.img.R.Size() {
var err error
if ui.img != nil {
ui.img.Free()
ui.img = nil
}
if ui.Kids[0].R.Dx() == 0 || ui.Kids[0].R.Dy() == 0 {
return
}
ui.img, err = dui.Display.AllocImage(ui.Kids[0].R, draw.ARGB32, false, 0x00000000)
if err != nil {
log.Errorf("allocimage: %v", err)
return
}
self.Draw = duit.DirtyKid
}
if self.Draw == duit.DirtyKid || ui.force {
duit.KidsDraw(dui, self, ui.Kids, ui.size, ui.Background, ui.img, image.ZP, m, true)
self.Draw = duit.Clean
ui.force = false
}
img.Draw(ui.img.R.Add(orig), ui.img, nil, image.ZP)
}
func (ui *Place) result(dui *duit.DUI, self *duit.Kid, r *duit.Result) {
relayout := false
redraw := false
for _, k := range ui.Kids {
if k.Layout != duit.Clean {
relayout = true
} else if k.Draw != duit.Clean {
redraw = true
}
}
if relayout {
self.Layout = duit.DirtyKid
self.Draw = duit.DirtyKid
ui.force = ui.force || r.Consumed
} else if redraw {
self.Draw = duit.DirtyKid
ui.force = ui.force || r.Consumed
}
}
func (ui *Place) Mouse(dui *duit.DUI, self *duit.Kid, m draw.Mouse, origM draw.Mouse, orig image.Point) (r duit.Result) {
r = duit.KidsMouse(dui, self, ui.kidsReversed, m, origM, orig)
ui.result(dui, self, &r)
return
}
func (ui *Place) Key(dui *duit.DUI, self *duit.Kid, k rune, m draw.Mouse, orig image.Point) (r duit.Result) {
r = duit.KidsKey(dui, self, ui.kidsReversed, k, m, orig)
ui.result(dui, self, &r)
return
}
func (ui *Place) FirstFocus(dui *duit.DUI, self *duit.Kid) (warp *image.Point) {
return duit.KidsFirstFocus(dui, self, ui.Kids)
}
func (ui *Place) Focus(dui *duit.DUI, self *duit.Kid, o duit.UI) (warp *image.Point) {
return duit.KidsFocus(dui, self, ui.Kids, o)
}
func (ui *Place) Mark(self *duit.Kid, o duit.UI, forLayout bool) (marked bool) {
return duit.KidsMark(self, ui.Kids, o, forLayout)
}
func (ui *Place) Print(self *duit.Kid, indent int) {
duit.PrintUI("Place", self, indent)
duit.KidsPrint(ui.Kids, indent+1)
}