Split element core into two separate structs - public and private
The public core half can be directly embedded, which means no wrapper methods!
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1526772a05
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@ -7,7 +7,9 @@ import "git.tebibyte.media/sashakoshka/tomo/theme"
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import "git.tebibyte.media/sashakoshka/tomo/artist"
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type Button struct {
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core Core
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*Core
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core CoreControl
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pressed bool
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enabled bool
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onClick func ()
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@ -18,7 +20,7 @@ type Button struct {
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func NewButton (text string) (element *Button) {
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element = &Button { enabled: true }
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element.core = NewCore(element)
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element.Core, element.core = NewCore(element)
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element.drawer.SetFace(theme.FontFaceRegular())
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element.SetText(text)
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return
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@ -94,48 +96,12 @@ func (element *Button) OnClick (callback func ()) {
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element.onClick = callback
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}
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func (element *Button) ColorModel () (model color.Model) {
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return color.RGBAModel
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}
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func (element *Button) At (x, y int) (pixel color.Color) {
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pixel = element.core.At(x, y)
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func (element *Button) AdvanceSelection (direction int) (ok bool) {
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return
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}
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func (element *Button) RGBAAt (x, y int) (pixel color.RGBA) {
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pixel = element.core.RGBAAt(x, y)
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return
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}
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func (element *Button) Bounds () (bounds image.Rectangle) {
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bounds = element.core.Bounds()
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return
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}
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func (element *Button) SetDrawCallback (draw func (region tomo.Image)) {
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element.core.SetDrawCallback(draw)
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}
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func (element *Button) SetMinimumSizeChangeCallback (
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notify func (width, height int),
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) {
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element.core.SetMinimumSizeChangeCallback(notify)
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}
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func (element *Button) Selectable () (selectable bool) {
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selectable = true
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return
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}
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func (element *Button) MinimumWidth () (minimum int) {
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minimum = element.core.MinimumWidth()
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return
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}
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func (element *Button) MinimumHeight () (minimum int) {
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minimum = element.core.MinimumHeight()
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return
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return true
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}
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func (element *Button) draw () {
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@ -5,24 +5,23 @@ import "image/color"
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import "git.tebibyte.media/sashakoshka/tomo"
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// Core is a struct that implements some core functionality common to most
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// widgets. It is possible to embed this directly into a struct, but this is not
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// reccomended as it exposes internal functionality.
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// widgets. It is meant to be embedded directly into a struct.
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type Core struct {
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*image.RGBA
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canvas *image.RGBA
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parent tomo.Element
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drawCallback func (region tomo.Image)
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minimumSizeChangeCallback func (width, height int)
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metrics struct {
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minimumWidth int
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minimumHeight int
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}
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hooks tomo.ParentHooks
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}
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// Core creates a new element core.
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func NewCore (parent tomo.Element) (core Core) {
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core = Core { parent: parent }
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// NewCore creates a new element core and its corresponding control.
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func NewCore (parent tomo.Element) (core *Core, control CoreControl) {
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core = &Core { parent: parent }
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control = CoreControl { core: core }
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return
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}
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@ -31,81 +30,75 @@ func (core Core) ColorModel () (model color.Model) {
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}
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func (core Core) At (x, y int) (pixel color.Color) {
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if core.RGBA == nil { return color.RGBA { } }
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pixel = core.RGBA.At(x, y)
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if core.canvas == nil { return color.RGBA { } }
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pixel = core.canvas.At(x, y)
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return
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}
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func (core Core) RGBAAt (x, y int) (pixel color.RGBA) {
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if core.RGBA == nil { return color.RGBA { } }
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pixel = core.RGBA.RGBAAt(x, y)
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if core.canvas == nil { return color.RGBA { } }
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pixel = core.canvas.RGBAAt(x, y)
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return
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}
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func (core Core) Bounds () (bounds image.Rectangle) {
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if core.RGBA != nil { bounds = core.RGBA.Bounds() }
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if core.canvas != nil { bounds = core.canvas.Bounds() }
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return
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}
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func (core *Core) SetDrawCallback (draw func (region tomo.Image)) {
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core.drawCallback = draw
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func (core *Core) SetParentHooks (hooks tomo.ParentHooks) {
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core.hooks = hooks
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}
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func (core *Core) SetMinimumSizeChangeCallback (
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notify func (width, height int),
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) {
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core.minimumSizeChangeCallback = notify
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func (core Core) MinimumSize () (width, height int) {
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return core.metrics.minimumWidth, core.metrics.minimumHeight
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}
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func (core Core) HasImage () (has bool) {
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has = core.RGBA != nil
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// CoreControl is a struct that can exert control over a control struct. It can
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// be used as a canvas. It must not be directly embedded into an element, but
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// instead kept as a private member.
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type CoreControl struct {
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*image.RGBA
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core *Core
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}
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func (control CoreControl) HasImage () (has bool) {
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has = control.RGBA != nil
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return
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}
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func (core Core) PushRegion (bounds image.Rectangle) {
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if core.drawCallback != nil {
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core.drawCallback(core.SubImage(bounds).
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(*image.RGBA))
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}
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func (control CoreControl) PushRegion (bounds image.Rectangle) {
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core := control.core
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core.hooks.RunDraw(control.SubImage(bounds).(*image.RGBA))
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}
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func (core Core) PushAll () {
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core.PushRegion(core.Bounds())
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func (control CoreControl) PushAll () {
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control.PushRegion(control.Bounds())
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}
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func (core *Core) AllocateCanvas (width, height int) {
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width, height, _ = core.ConstrainSize(width, height)
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core.RGBA = image.NewRGBA(image.Rect (0, 0, width, height))
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func (control CoreControl) AllocateCanvas (width, height int) {
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core := control.core
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width, height, _ = control.ConstrainSize(width, height)
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core.canvas = image.NewRGBA(image.Rect (0, 0, width, height))
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control.RGBA = core.canvas
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}
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func (core Core) MinimumWidth () (minimum int) {
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minimum = core.metrics.minimumWidth
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return
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}
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func (core Core) MinimumHeight () (minimum int) {
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minimum = core.metrics.minimumHeight
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return
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}
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func (core *Core) SetMinimumSize (width, height int) {
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func (control CoreControl) SetMinimumSize (width, height int) {
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core := control.core
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if width != core.metrics.minimumWidth ||
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height != core.metrics.minimumHeight {
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core.metrics.minimumWidth = width
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core.metrics.minimumHeight = height
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if core.minimumSizeChangeCallback != nil {
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core.minimumSizeChangeCallback(width, height)
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}
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core.hooks.RunMinimumSizeChange(width, height)
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// if there is an image buffer, and the current size is less
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// than this new minimum size, send core.parent a resize event.
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if core.HasImage() {
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bounds := core.Bounds()
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if control.HasImage() {
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bounds := control.Bounds()
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imageWidth,
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imageHeight,
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constrained := core.ConstrainSize (
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constrained := control.ConstrainSize (
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bounds.Dx(),
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bounds.Dy())
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if constrained {
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@ -118,12 +111,13 @@ func (core *Core) SetMinimumSize (width, height int) {
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}
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}
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func (core Core) ConstrainSize (
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func (control CoreControl) ConstrainSize (
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inWidth, inHeight int,
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) (
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outWidth, outHeight int,
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constrained bool,
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) {
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core := control.core
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outWidth = inWidth
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outHeight = inHeight
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if outWidth < core.metrics.minimumWidth {
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2
tomo.go
2
tomo.go
@ -121,7 +121,7 @@ type Window interface {
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// SetIcon taks in a list different sizes of the same icon and selects
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// the best one to display on the window title bar, dock, or whatever is
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// applicable for the given backend. This method might have no effect
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// with some backends.
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// for some backends.
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SetIcon (sizes []image.Image)
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// Show shows the window. The window starts off hidden, so this must be
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