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Added (optional) dropshadow for label.

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This commit is contained in:
Sander Schobers 2020-12-12 14:46:52 +01:00
parent c2e688cc68
commit 46b3357635
1 changed files with 21 additions and 10 deletions
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29
ui/label.go
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@ -1,6 +1,8 @@
package ui
import (
"image/color"
"opslag.de/schobers/geom"
)
@ -8,6 +10,7 @@ type Label struct {
ControlBase
Text string
DropShadow color.Color
desired CachedValue
}
@ -37,18 +40,26 @@ func (l *Label) DesiredSize(ctx Context, _ geom.PointF32) geom.PointF32 {
return l.desired.GetContext(ctx, l.desiredSize, l.hashDesiredSize).(geom.PointF32)
}
func (l *Label) getLabelTopLeft(ctx Context) geom.PointF32 {
pad := ctx.Style().Dimensions.TextPadding
bounds := l.bounds.Inset(pad)
switch l.TextAlignment {
case AlignRight:
return geom.PtF32(bounds.Max.X, bounds.Min.Y)
case AlignCenter:
return geom.PtF32(.5*(bounds.Min.X+bounds.Max.X), bounds.Min.Y)
default:
return bounds.Min
}
}
func (l *Label) Render(ctx Context) {
l.RenderBackground(ctx)
fontColor := l.TextColor(ctx)
fontName := l.FontName(ctx)
pad := ctx.Style().Dimensions.TextPadding
bounds := l.bounds.Inset(pad)
switch l.TextAlignment {
case AlignLeft:
ctx.Fonts().TextAlign(fontName, bounds.Min, fontColor, l.Text, l.TextAlignment)
case AlignRight:
ctx.Fonts().TextAlign(fontName, geom.PtF32(bounds.Max.X, bounds.Min.Y), fontColor, l.Text, l.TextAlignment)
case AlignCenter:
ctx.Fonts().TextAlign(fontName, geom.PtF32(.5*(bounds.Min.X+bounds.Max.X), bounds.Min.Y), fontColor, l.Text, l.TextAlignment)
topLeft := l.getLabelTopLeft(ctx)
if l.DropShadow != nil {
ctx.Fonts().TextAlign(fontName, topLeft.Add2D(1, 1), l.DropShadow, l.Text, l.TextAlignment)
}
ctx.Fonts().TextAlign(fontName, topLeft, fontColor, l.Text, l.TextAlignment)
}