613 lines
15 KiB
Go
613 lines
15 KiB
Go
package system
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import "image"
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import "image/color"
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import "git.tebibyte.media/tomo/tomo"
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import "git.tebibyte.media/tomo/tomo/data"
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import "git.tebibyte.media/tomo/tomo/input"
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import "git.tebibyte.media/tomo/tomo/event"
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import "git.tebibyte.media/tomo/tomo/canvas"
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import "git.tebibyte.media/tomo/backend/internal/util"
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type textureMode int; const (
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textureModeTile textureMode = iota
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textureModeCenter
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)
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type box struct {
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system *System
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parent parent
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outer anyBox
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role tomo.Role
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styleCookie event.Cookie
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lastStyleNonce int
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lastIconsNonce int
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bounds image.Rectangle
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minSize image.Point
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userMinSize image.Point
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innerClippingBounds image.Rectangle
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minSizeQueued bool
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focusQueued *bool
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padding tomo.Inset
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border []tomo.Border
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color color.Color
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texture canvas.Texture
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textureMode textureMode
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dndData data.Data
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dndAccept []data.Mime
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focused bool
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focusable bool
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canvas util.Memo[canvas.Canvas]
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drawer canvas.Drawer
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on struct {
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focusEnter event.FuncBroadcaster
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focusLeave event.FuncBroadcaster
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dndEnter event.FuncBroadcaster
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dndLeave event.FuncBroadcaster
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dndDrop event.Broadcaster[func (data.Data)]
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mouseEnter event.FuncBroadcaster
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mouseLeave event.FuncBroadcaster
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mouseMove event.FuncBroadcaster
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mouseDown event.Broadcaster[func (input.Button)]
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mouseUp event.Broadcaster[func (input.Button)]
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scroll event.Broadcaster[func (float64, float64)]
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keyDown event.Broadcaster[func (input.Key, bool)]
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keyUp event.Broadcaster[func (input.Key, bool)]
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styleChange event.FuncBroadcaster
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iconsChange event.FuncBroadcaster
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}
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}
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func (this *System) newBox (outer anyBox) *box {
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box := &box {
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system: this,
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color: color.Transparent,
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outer: outer,
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drawer: outer,
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}
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box.canvas = util.NewMemo (func () canvas.Canvas {
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if box.parent == nil { return nil }
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parentCanvas := box.parent.getCanvas()
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if parentCanvas == nil { return nil }
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return parentCanvas.SubCanvas(box.bounds)
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})
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if outer == nil {
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box.drawer = box
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box.outer = box
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}
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box.invalidateMinimum()
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return box
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}
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func (this *System) NewBox () tomo.Box {
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return this.newBox(nil)
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}
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func (this *box) GetBox () tomo.Box {
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return this.outer
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}
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func (this *box) Window () tomo.Window {
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hierarchy := this.getHierarchy()
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if hierarchy == nil { return nil }
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return hierarchy.getWindow()
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}
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func (this *box) Bounds () image.Rectangle {
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return this.bounds
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}
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func (this *box) InnerBounds () image.Rectangle {
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return this.padding.Apply(this.innerClippingBounds)
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}
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func (this *box) MinimumSize () image.Point {
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return this.minSize
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}
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func (this *box) Role () tomo.Role {
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return this.role
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}
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func (this *box) borderSum () tomo.Inset {
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sum := tomo.Inset { }
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for _, border := range this.border {
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sum[0] += border.Width[0]
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sum[1] += border.Width[1]
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sum[2] += border.Width[2]
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sum[3] += border.Width[3]
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}
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return sum
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}
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func (this *box) borderAndPaddingSum () tomo.Inset {
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sum := this.borderSum()
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sum[0] += this.padding[0]
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sum[1] += this.padding[1]
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sum[2] += this.padding[2]
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sum[3] += this.padding[3]
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return sum
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}
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func (this *box) SetBounds (bounds image.Rectangle) {
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if this.bounds == bounds { return }
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this.bounds = bounds
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this.invalidateLayout()
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}
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func (this *box) SetColor (c color.Color) {
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if c == nil { c = color.Transparent }
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if this.color == c { return }
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this.color = c
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this.invalidateDraw()
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}
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func (this *box) SetTextureTile (texture canvas.Texture) {
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if this.texture == texture && this.textureMode == textureModeTile { return }
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this.textureMode = textureModeTile
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this.texture = texture
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this.invalidateDraw()
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}
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func (this *box) SetTextureCenter (texture canvas.Texture) {
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if this.texture == texture && this.textureMode == textureModeCenter { return }
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this.texture = texture
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this.textureMode = textureModeCenter
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this.invalidateDraw()
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}
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func (this *box) SetBorder (borders ...tomo.Border) {
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previousBorderSum := this.borderSum()
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previousBorders := this.border
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this.border = borders
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// only invalidate the layout if the border is sized differently
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if this.borderSum() != previousBorderSum {
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this.invalidateLayout()
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this.invalidateMinimum()
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return
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}
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// if the border takes up the same amount of space, only invalidate the
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// drawing if it looks different
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for index, newBorder := range this.border {
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different :=
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index >= len(previousBorders) ||
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newBorder != previousBorders[index]
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if different {
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this.invalidateDraw()
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return
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}
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}
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}
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func (this *box) SetMinimumSize (size image.Point) {
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if this.userMinSize == size { return }
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this.userMinSize = size
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this.invalidateMinimum()
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}
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func (this *box) SetPadding (padding tomo.Inset) {
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if this.padding == padding { return }
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this.padding = padding
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this.invalidateLayout()
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this.invalidateMinimum()
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}
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func (this *box) SetRole (role tomo.Role) {
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this.role = role
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}
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func (this *box) SetDNDData (dat data.Data) {
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this.dndData = dat
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}
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func (this *box) SetDNDAccept (types ...data.Mime) {
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this.dndAccept = types
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}
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func (this *box) SetFocused (focused bool) {
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hierarchy := this.getHierarchy()
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if hierarchy == nil {
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focusedCopy := focused
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this.focusQueued = &focusedCopy
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return
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}
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if !this.focusable { return }
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if this.Focused () && !focused {
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hierarchy.focus(nil)
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} else if !this.Focused() && focused {
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hierarchy.focus(this.outer)
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}
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}
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func (this *box) SetFocusable (focusable bool) {
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if this.focusable == focusable { return }
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this.focusable = focusable
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if !focusable {
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this.SetFocused(false)
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}
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}
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func (this *box) Focused () bool {
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hierarchy := this.getHierarchy()
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if hierarchy == nil { return false }
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return hierarchy.isFocused(this.outer)
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}
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func (this *box) Modifiers () input.Modifiers {
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hierarchy := this.getHierarchy()
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if hierarchy == nil { return input.Modifiers { } }
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return hierarchy.getModifiers()
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}
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func (this *box) MousePosition () image.Point {
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hierarchy := this.getHierarchy()
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if hierarchy == nil { return image.Point { } }
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return hierarchy.getMousePosition()
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}
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// ----- event handler setters ---------------------------------------------- //
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func (this *box) OnFocusEnter (callback func()) event.Cookie {
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return this.on.focusEnter.Connect(callback)
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}
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func (this *box) OnFocusLeave (callback func()) event.Cookie {
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return this.on.focusLeave.Connect(callback)
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}
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func (this *box) OnDNDEnter (callback func()) event.Cookie {
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return this.on.dndEnter.Connect(callback)
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}
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func (this *box) OnDNDLeave (callback func()) event.Cookie {
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return this.on.dndLeave.Connect(callback)
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}
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func (this *box) OnDNDDrop (callback func(data.Data)) event.Cookie {
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return this.on.dndDrop.Connect(callback)
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}
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func (this *box) OnMouseEnter (callback func()) event.Cookie {
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return this.on.mouseEnter.Connect(callback)
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}
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func (this *box) OnMouseLeave (callback func()) event.Cookie {
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return this.on.mouseLeave.Connect(callback)
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}
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func (this *box) OnMouseMove (callback func()) event.Cookie {
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return this.on.mouseMove.Connect(callback)
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}
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func (this *box) OnMouseDown (callback func(input.Button)) event.Cookie {
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return this.on.mouseDown.Connect(callback)
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}
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func (this *box) OnMouseUp (callback func(input.Button)) event.Cookie {
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return this.on.mouseUp.Connect(callback)
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}
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func (this *box) OnScroll (callback func(deltaX, deltaY float64)) event.Cookie {
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return this.on.scroll.Connect(callback)
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}
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func (this *box) OnKeyDown (callback func(key input.Key, numberPad bool)) event.Cookie {
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return this.on.keyDown.Connect(callback)
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}
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func (this *box) OnKeyUp (callback func(key input.Key, numberPad bool)) event.Cookie {
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return this.on.keyUp.Connect(callback)
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}
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func (this *box) OnStyleChange (callback func()) event.Cookie {
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return this.on.styleChange.Connect(callback)
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}
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func (this *box) OnIconsChange (callback func()) event.Cookie {
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return this.on.iconsChange.Connect(callback)
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}
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func (this *box) handleFocusEnter () {
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this.on.focusEnter.Broadcast()
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}
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func (this *box) handleFocusLeave () {
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this.on.focusLeave.Broadcast()
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}
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func (this *box) handleMouseEnter () {
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this.on.mouseEnter.Broadcast()
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}
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func (this *box) handleMouseLeave () {
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this.on.mouseLeave.Broadcast()
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}
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func (this *box) handleMouseMove () {
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this.on.mouseMove.Broadcast()
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}
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func (this *box) handleMouseDown (button input.Button) {
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if this.focusable {
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this.SetFocused(true)
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} else {
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hierarchy := this.getHierarchy()
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if hierarchy == nil { return }
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hierarchy.focus(nil)
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}
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for _, listener := range this.on.mouseDown.Listeners() {
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listener(button)
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}
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}
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func (this *box) handleMouseUp (button input.Button) {
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for _, listener := range this.on.mouseUp.Listeners() {
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listener(button)
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}
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}
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func (this *box) handleScroll (x, y float64) {
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for _, listener := range this.on.scroll.Listeners() {
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listener(x, y)
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}
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}
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func (this *box) handleKeyDown (key input.Key, numberPad bool) {
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for _, listener := range this.on.keyDown.Listeners() {
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listener(key, numberPad)
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}
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}
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func (this *box) handleKeyUp (key input.Key, numberPad bool) {
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for _, listener := range this.on.keyUp.Listeners() {
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listener(key, numberPad)
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}
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}
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// -------------------------------------------------------------------------- //
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func (this *box) Draw (can canvas.Canvas) {
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if can == nil { return }
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pen := can.Pen()
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bounds := this.Bounds()
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// background
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pen.Fill(this.color)
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if this.textureMode == textureModeTile {
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pen.Texture(this.texture)
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}
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if this.transparent() && this.parent != nil {
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this.parent.drawBackgroundPart(can)
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}
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pen.Rectangle(bounds)
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// centered texture
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if this.textureMode == textureModeCenter && this.texture != nil {
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textureBounds := this.texture.Bounds()
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textureOrigin :=
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bounds.Min.
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Add(image.Pt (
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bounds.Dx() / 2,
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bounds.Dy() / 2)).
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Sub(image.Pt (
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textureBounds.Dx() / 2,
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textureBounds.Dy() / 2))
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pen.Fill(color.Transparent)
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pen.Texture(this.texture)
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pen.Rectangle(textureBounds.Sub(textureBounds.Min).Add(textureOrigin))
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}
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}
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func (this *box) drawBorders (can canvas.Canvas) {
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if can == nil { return }
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pen := can.Pen()
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bounds := this.bounds
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rectangle := func (x0, y0, x1, y1 int, c color.Color) {
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area := image.Rect(x0, y0, x1, y1)
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if util.Transparent(c) && this.parent != nil {
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this.parent.drawBackgroundPart(can.SubCanvas(area))
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}
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pen.Fill(c)
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pen.Rectangle(area)
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}
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for _, border := range this.border {
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rectangle (
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bounds.Min.X,
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bounds.Min.Y,
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bounds.Max.X,
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bounds.Min.Y + border.Width[tomo.SideTop],
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border.Color[tomo.SideTop])
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rectangle (
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bounds.Min.X,
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bounds.Max.Y - border.Width[tomo.SideBottom],
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bounds.Max.X,
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bounds.Max.Y,
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border.Color[tomo.SideBottom])
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rectangle (
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bounds.Min.X,
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bounds.Min.Y + border.Width[tomo.SideTop],
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bounds.Min.X + border.Width[tomo.SideLeft],
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bounds.Max.Y - border.Width[tomo.SideBottom],
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border.Color[tomo.SideLeft])
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rectangle (
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bounds.Max.X - border.Width[tomo.SideRight],
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bounds.Min.Y + border.Width[tomo.SideTop],
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bounds.Max.X,
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bounds.Max.Y - border.Width[tomo.SideBottom],
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border.Color[tomo.SideRight])
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bounds = border.Width.Apply(bounds)
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}
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}
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func (this *box) contentMinimum () image.Point {
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var minimum image.Point
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minimum.X += this.padding.Horizontal()
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minimum.Y += this.padding.Vertical()
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borderSum := this.borderSum()
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minimum.X += borderSum.Horizontal()
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minimum.Y += borderSum.Vertical()
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return minimum
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}
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func (this *box) doMinimumSize () {
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this.minSize = this.outer.contentMinimum()
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if this.minSize.X < this.userMinSize.X {
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this.minSize.X = this.userMinSize.X
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}
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if this.minSize.Y < this.userMinSize.Y {
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this.minSize.Y = this.userMinSize.Y
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}
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if this.parent != nil {
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this.parent.notifyMinimumSizeChange(this)
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}
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}
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// var drawcnt int
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func (this *box) doDraw () {
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// println("DRAW", drawcnt)
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// drawcnt ++
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canvas := this.canvas.Value()
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if canvas == nil { return }
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if this.drawer != nil {
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this.drawBorders(canvas)
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this.drawer.Draw(canvas.SubCanvas(this.innerClippingBounds))
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}
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}
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// var laycnt int
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func (this *box) doLayout () {
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// println("LAYOUT", laycnt)
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// laycnt ++
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this.innerClippingBounds = this.borderSum().Apply(this.bounds)
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this.outer.recursiveLoseCanvas()
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}
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func (this *box) setParent (parent parent) {
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if this.parent != parent && this.Focused() {
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this.SetFocused(false)
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}
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this.parent = parent
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this.outer.recursiveReApply()
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}
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func (this *box) getParent () parent {
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return this.parent
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}
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func (this *box) flushActionQueue () {
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if this.getHierarchy() == nil { return }
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if this.minSizeQueued {
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this.invalidateMinimum()
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}
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if this.focusQueued != nil {
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this.SetFocused(*this.focusQueued)
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}
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}
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func (this *box) recursiveRedo () {
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this.doLayout()
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this.doDraw()
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}
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func (this *box) recursiveLoseCanvas () {
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this.canvas.InvalidateTo(nil)
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}
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func (this *box) invalidateLayout () {
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hierarchy := this.getHierarchy()
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if hierarchy == nil { return }
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hierarchy.invalidateLayout(this.outer)
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}
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func (this *box) invalidateDraw () {
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hierarchy := this.getHierarchy()
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if hierarchy == nil { return }
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hierarchy.invalidateDraw(this.outer)
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}
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func (this *box) invalidateMinimum () {
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hierarchy := this.getHierarchy()
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if hierarchy == nil {
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this.minSizeQueued = true
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} else {
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hierarchy.invalidateMinimum(this.outer)
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}
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}
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func (this *box) recursiveReApply () {
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if this.getHierarchy() == nil { return }
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// re-apply styling, icons *if needed*
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// style
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hierarchyStyleNonce := this.getStyleNonce()
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if this.lastStyleNonce != hierarchyStyleNonce {
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// remove old style
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this.lastStyleNonce = hierarchyStyleNonce
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if this.styleCookie != nil {
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this.styleCookie.Close()
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this.styleCookie = nil
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}
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// apply new one
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if style := this.getStyle(); style != nil {
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this.styleCookie = style.Apply(this.outer)
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}
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this.on.styleChange.Broadcast()
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}
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// icons
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hierarchyIconsNonce := this.getIconsNonce()
|
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if this.lastIconsNonce != hierarchyIconsNonce {
|
|
this.lastIconsNonce = hierarchyIconsNonce
|
|
this.on.iconsChange.Broadcast()
|
|
}
|
|
}
|
|
|
|
func (this *box) canBeFocused () bool {
|
|
return this.focusable
|
|
}
|
|
|
|
func (this *box) boxUnder (point image.Point, category eventCategory) anyBox {
|
|
if point.In(this.bounds) {
|
|
return this.outer
|
|
} else {
|
|
return nil
|
|
}
|
|
}
|
|
|
|
func (this *box) propagate (callback func (anyBox) bool) bool {
|
|
return callback(this.outer)
|
|
}
|
|
|
|
func (this *box) propagateAlt (callback func (anyBox) bool) bool {
|
|
return callback(this.outer)
|
|
}
|
|
|
|
func (this *box) transparent () bool {
|
|
// TODO uncomment once we have
|
|
// a way to detect texture transparency
|
|
return util.Transparent(this.color) /*&&
|
|
(this.texture == nil || !this.texture.Opaque())*/
|
|
}
|
|
|
|
func (this *box) getWindow () tomo.Window {
|
|
hierarchy := this.getHierarchy()
|
|
if hierarchy == nil { return nil }
|
|
return hierarchy.getWindow()
|
|
}
|
|
|
|
func (this *box) getStyle () tomo.Style {
|
|
hierarchy := this.getHierarchy()
|
|
if hierarchy == nil { return nil }
|
|
return hierarchy.getStyle()
|
|
}
|
|
|
|
func (this *box) getHierarchy () *Hierarchy {
|
|
if this.parent == nil { return nil }
|
|
return this.parent.getHierarchy()
|
|
}
|
|
|
|
func (this *box) getStyleNonce () int {
|
|
// should panic if not in the tree
|
|
return this.getHierarchy().getStyleNonce()
|
|
}
|
|
|
|
func (this *box) getIconsNonce () int {
|
|
// should panic if not in the tree
|
|
return this.getHierarchy().getIconsNonce()
|
|
}
|