Added dot selection visualization
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parent
991f72cd8f
commit
639810fb13
72
textbox.go
72
textbox.go
@ -3,6 +3,7 @@ package x
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import "image"
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import "image/color"
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import "golang.org/x/image/font"
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import "golang.org/x/image/math/fixed"
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import "git.tebibyte.media/tomo/tomo"
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import "git.tebibyte.media/tomo/typeset"
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import "git.tebibyte.media/tomo/tomo/text"
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@ -24,6 +25,7 @@ type textBox struct {
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selectable bool
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dot text.Dot
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dotColor color.Color
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drawer typeset.Drawer
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@ -98,6 +100,14 @@ func (this *textBox) SetSelectable (selectable bool) {
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this.selectable = selectable
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}
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func (this *textBox) SetDotColor (c color.Color) {
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if this.dotColor == c { return }
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this.dotColor = c
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if !this.dot.Empty() {
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this.invalidateDraw()
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}
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}
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func (this *textBox) Select (dot text.Dot) {
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if !this.selectable { return }
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if this.dot == dot { return }
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@ -144,24 +154,64 @@ func (this *textBox) Draw (can canvas.Canvas) {
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this.drawer.Draw(can, this.textColor, this.textOffset())
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}
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func roundPt (point fixed.Point26_6) image.Point {
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return image.Pt(point.X.Round(), point.Y.Round())
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}
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func fixPt (point image.Point) fixed.Point26_6 {
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return fixed.P(point.X, point.Y)
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}
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func (this *textBox) drawDot (can canvas.Canvas) {
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pen := can.Pen()
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pen.Fill(color.Transparent)
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pen.Stroke(this.textColor)
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pen.StrokeWeight(1)
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bounds := this.InnerBounds()
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metrics := this.face.Metrics()
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dot := this.dot.Canon()
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start := this.drawer.PositionAt(dot.Start).Add(fixPt(this.textOffset()))
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end := this.drawer.PositionAt(dot.End ).Add(fixPt(this.textOffset()))
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height := this.drawer.LineHeight().Round()
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ascent := fixed.Point26_6 { Y: metrics.Descent }
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descent := fixed.Point26_6 { Y: metrics.Ascent }
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// TODO draw dot
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if this.dot.Empty() {
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metrics := this.face.Metrics()
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position := this.drawer.PositionAt(this.dot.Start)
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roundPos :=
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image.Pt(position.X.Round(), position.Y.Round()).
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Add(this.textOffset())
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pen.Path (
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roundPos.Add(image.Pt(0, metrics.Descent.Round())),
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roundPos.Sub(image.Pt(0, metrics.Ascent.Round())))
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} else {
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switch {
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case dot.Empty():
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pen.Path(roundPt(start.Add(ascent)), roundPt(start.Sub(descent)))
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case start.Y == end.Y:
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pen.Fill(this.dotColor)
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pen.StrokeWeight(0)
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pen.Rectangle(image.Rectangle {
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Min: roundPt(start.Add(ascent)),
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Max: roundPt(end.Sub(descent)),
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})
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default:
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pen.Fill(this.dotColor)
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pen.StrokeWeight(0)
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rect := image.Rectangle {
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Min: roundPt(start.Add(ascent)),
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Max: roundPt(start.Sub(descent)),
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}
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rect.Max.X = bounds.Max.X
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pen.Rectangle(rect)
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if end.Y - start.Y > fixed.I(height) {
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rect.Min.X = bounds.Min.X
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rect.Min.Y = roundPt(start.Sub(descent)).Y + height
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rect.Max.X = bounds.Max.X
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rect.Max.Y = roundPt(end.Add(ascent)).Y - height
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pen.Rectangle(rect)
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}
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rect = image.Rectangle {
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Min: roundPt(end.Add(ascent)),
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Max: roundPt(end.Sub(descent)),
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}
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rect.Min.X = bounds.Min.X
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pen.Rectangle(rect)
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}
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}
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