115 lines
2.5 KiB
Go
115 lines
2.5 KiB
Go
package basic
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import "image"
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import "image/color"
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import "git.tebibyte.media/sashakoshka/tomo"
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import "git.tebibyte.media/sashakoshka/tomo/theme"
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import "git.tebibyte.media/sashakoshka/tomo/artist"
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type Label struct {
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core Core
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text string
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drawer artist.TextDrawer
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}
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func NewLabel (text string) (element *Label) {
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element = &Label { }
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element.core = NewCore(element)
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face := theme.FontFaceRegular()
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element.drawer.SetFace(face)
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element.SetText(text)
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// FIXME: set the minimum size to one char
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metrics := face.Metrics()
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emspace, _ := face.GlyphAdvance('M')
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intEmspace := emspace.Round()
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if intEmspace < 1 { intEmspace = theme.Padding()}
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element.core.SetMinimumSize(intEmspace, metrics.Height.Round())
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return
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}
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func (element *Label) Handle (event tomo.Event) {
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switch event.(type) {
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case tomo.EventResize:
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resizeEvent := event.(tomo.EventResize)
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element.core.AllocateCanvas (
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resizeEvent.Width,
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resizeEvent.Height)
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element.drawer.SetMaxWidth (resizeEvent.Width)
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element.drawer.SetMaxHeight(resizeEvent.Height)
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element.draw()
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}
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return
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}
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func (element *Label) SetText (text string) {
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if element.text == text { return }
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element.text = text
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element.drawer.SetText(text)
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if element.core.HasImage () {
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element.draw()
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element.core.PushAll()
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}
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}
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func (element *Label) ColorModel () (model color.Model) {
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return color.RGBAModel
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}
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func (element *Label) At (x, y int) (pixel color.Color) {
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pixel = element.core.At(x, y)
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return
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}
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func (element *Label) 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 *Label) 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 *Label) SetDrawCallback (draw func (region tomo.Image)) {
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element.core.SetDrawCallback(draw)
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}
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func (element *Label) 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 *Label) Selectable () (selectable bool) {
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return
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}
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func (element *Label) 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 *Label) MinimumHeight () (minimum int) {
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minimum = element.core.MinimumHeight()
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return
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}
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func (element *Label) draw () {
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bounds := element.core.Bounds()
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artist.Rectangle (
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element.core,
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theme.BackgroundImage(),
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nil, 0,
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bounds)
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textBounds := element.drawer.LayoutBounds()
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foreground := theme.ForegroundImage()
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element.drawer.Draw (element.core, foreground, image.Point {
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X: 0 - textBounds.Min.X,
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Y: 0 - textBounds.Min.Y,
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})
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}
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