engine

func (*Element) AddChild ¶

func (e *Element) AddChild(child *Element)

AddChild adds a child element.

func (*Element) Attr ¶

func (e *Element) Attr(name, def string) string

Attr returns the string attribute or default.

func (*Element) AttrBool ¶

func (e *Element) AttrBool(name string, def bool) bool

AttrBool returns a boolean attribute or default.

func (*Element) AttrColor ¶

func (e *Element) AttrColor(name string, def graphics.Color) graphics.Color

AttrColor returns a color attribute or default.

func (*Element) AttrFloat ¶

func (e *Element) AttrFloat(name string, def float64) float64

AttrFloat returns a float attribute or default.

func (*Element) AttrInt ¶

func (e *Element) AttrInt(name string, def int) int

AttrInt returns an integer attribute or default.

func (*Element) BindSignal ¶

func (e *Element) BindSignal(name string, fn interface{}) bool

BindSignal binds a runtime signal handler (for example "clicked").

func (*Element) Bounds ¶

func (e *Element) Bounds() graphics.Rect

func (*Element) ChildElements ¶

func (e *Element) ChildElements() []*Element

ChildElements returns child elements.

func (*Element) Children ¶

func (e *Element) Children() []gapp.Widget

Children returns child widgets (for app.App damage tracking).

func (*Element) ClearChildren ¶

func (e *Element) ClearChildren()

ClearChildren removes all child elements.

func (*Element) DirtyRects ¶

func (e *Element) DirtyRects() []graphics.Rect

DirtyRects returns optional subregions that should be redrawn for this widget. Nil means repaint the full widget bounds.

func (*Element) Draw ¶

func (e *Element) Draw(buf *graphics.Buffer)

func (*Element) EmitSignal ¶

func (e *Element) EmitSignal(name string, args ...interface{})

EmitSignal emits a signal by name with optional args.

func (*Element) FindChild ¶

func (e *Element) FindChild(id string) *Element

FindChild finds a descendant by id (depth-first).

func (*Element) GetAttribute ¶

func (e *Element) GetAttribute(name string) string

GetAttribute returns an attribute value.

func (*Element) HandleEvent ¶

func (e *Element) HandleEvent(ev graphics.Event) bool

func (*Element) HasAttribute ¶

func (e *Element) HasAttribute(name string) bool

HasAttribute reports whether the attribute key exists.

func (*Element) ID ¶

func (e *Element) ID() string

ID returns the element's id.

func (*Element) IsDirty ¶

func (e *Element) IsDirty() bool

func (*Element) IsFocused ¶

func (e *Element) IsFocused() bool

func (*Element) IsVisible ¶

func (e *Element) IsVisible() bool

func (*Element) MarkClean ¶

func (e *Element) MarkClean()

func (*Element) MarkDirty ¶

func (e *Element) MarkDirty()

func (*Element) MinSize ¶

func (e *Element) MinSize() graphics.Point

func (*Element) ScrollTextAreaToBottom ¶

func (e *Element) ScrollTextAreaToBottom()

ScrollTextAreaToBottom moves the multiline viewport to the newest lines.

func (*Element) SelfDirty ¶

func (e *Element) SelfDirty() bool

func (*Element) SetAttribute ¶

func (e *Element) SetAttribute(name string, value interface{})

SetAttribute sets an attribute value and marks dirty.

func (*Element) SetBounds ¶

func (e *Element) SetBounds(r graphics.Rect)

func (*Element) SetFocused ¶

func (e *Element) SetFocused(focused bool)

func (*Element) SetID ¶

func (e *Element) SetID(id string)

SetID updates the element id.

func (*Element) SetTerminalBuffer ¶

func (e *Element) SetTerminalBuffer(lines [][]TerminalCell, cursorCol, cursorRow int, showCursor bool)

SetTerminalBuffer updates a multiline element with terminal-styled cells. It keeps the text-area scroll state while replacing its backing lines.

func (*Element) SetVisible ¶

func (e *Element) SetVisible(visible bool)

func (*Element) Tag ¶

func (e *Element) Tag() string

Tag returns the element's tag name.

func (*Element) TextAreaAtBottom ¶

func (e *Element) TextAreaAtBottom(threshold int) bool

TextAreaAtBottom reports whether the current multiline viewport is at the end.