73 lines
1.7 KiB
Go
73 lines
1.7 KiB
Go
package elements
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import "tomo"
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import "art"
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var spacerCase = tomo.C("tomo", "spacer")
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// Spacer can be used to put space between two elements..
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type Spacer struct {
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entity tomo.Entity
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line bool
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}
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// NewSpacer creates a new spacer.
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func NewSpacer () (element *Spacer) {
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element = &Spacer { }
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element.entity = tomo.GetBackend().NewEntity(element)
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element.updateMinimumSize()
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return
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}
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// NewLine creates a new line separator.
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func NewLine () (element *Spacer) {
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element = NewSpacer()
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element.SetLine(true)
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return
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}
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// Entity returns this element's entity.
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func (element *Spacer) Entity () tomo.Entity {
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return element.entity
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}
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// Draw causes the element to draw to the specified destination canvas.
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func (element *Spacer) Draw (destination art.Canvas) {
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bounds := element.entity.Bounds()
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if element.line {
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pattern := element.entity.Theme().Pattern (
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tomo.PatternLine,
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tomo.State { }, spacerCase)
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pattern.Draw(destination, bounds)
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} else {
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pattern := element.entity.Theme().Pattern (
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tomo.PatternBackground,
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tomo.State { }, spacerCase)
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pattern.Draw(destination, bounds)
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}
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}
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/// SetLine sets whether or not the spacer will appear as a colored line.
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func (element *Spacer) SetLine (line bool) {
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if element.line == line { return }
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element.line = line
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element.updateMinimumSize()
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element.entity.Invalidate()
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}
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func (element *Spacer) HandleThemeChange () {
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element.entity.Invalidate()
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}
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func (element *Spacer) updateMinimumSize () {
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if element.line {
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padding := element.entity.Theme().Padding(tomo.PatternLine, spacerCase)
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element.entity.SetMinimumSize (
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padding.Horizontal(),
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padding.Vertical())
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} else {
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element.entity.SetMinimumSize(1, 1)
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}
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}
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