104 lines
2.5 KiB
Go
104 lines
2.5 KiB
Go
package basic
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import "image"
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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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import "git.tebibyte.media/sashakoshka/tomo/elements/core"
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// Label is a simple text box.
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type Label struct {
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*core.Core
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core core.CoreControl
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wrap bool
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text string
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drawer artist.TextDrawer
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}
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// NewLabel creates a new label. If wrap is set to true, the text inside will be
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// wrapped.
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func NewLabel (text string, wrap bool) (element *Label) {
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element = &Label { }
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element.Core, element.core = core.NewCore(element)
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face := theme.FontFaceRegular()
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element.drawer.SetFace(face)
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element.SetWrap(wrap)
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element.SetText(text)
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return
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}
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// Handle handles and event.
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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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// SetText sets the label's text.
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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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element.updateMinimumSize()
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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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// SetWrap sets wether or not the label's text wraps. If the text is set to
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// wrap, the element will have a minimum size of a single character and
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// automatically wrap its text. If the text is set to not wrap, the element will
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// have a minimum size that fits its text.
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func (element *Label) SetWrap (wrap bool) {
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if wrap == element.wrap { return }
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element.wrap = wrap
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element.updateMinimumSize()
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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) updateMinimumSize () {
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if element.wrap {
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em := element.drawer.Em().Round()
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if em < 1 { em = theme.Padding() }
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element.core.SetMinimumSize (
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em, element.drawer.LineHeight().Round())
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} else {
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bounds := element.drawer.LayoutBounds()
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element.core.SetMinimumSize(bounds.Dx(), bounds.Dy())
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}
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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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