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Added OnSelectedChanged to Checkbox.

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Updated graphics for Checkbox.
This commit is contained in:
Sander Schobers 2019-04-11 23:30:26 +02:00
parent 99c76545ef
commit 3e7e2ab682
1 changed files with 42 additions and 14 deletions
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56
ui/checkbox.go
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@ -4,9 +4,13 @@ import (
"opslag.de/schobers/geom"
)
type SelectedChangedFn func(ctx Context, c Control, selected bool)
type Checkbox struct {
ControlBase
onSelectedChanged SelectedChangedFn
Selected bool
Text string
}
@ -26,15 +30,21 @@ func (c *Checkbox) desiredSize(ctx Context) geom.PointF32 {
if len(c.Text) != 0 {
w += pad + font.WidthOf(c.Text)
}
icon, _ := ctx.Images().ScaledHeight(c.icon(ctx, false), h)
icon, _ := ctx.Images().ScaledHeight(c.getOrCreateNormalIcon(ctx), h)
w += pad + icon.Width()
return geom.PtF32(w+pad, pad+h+pad)
}
func (c *Checkbox) icon(ctx Context, selected bool) Image {
if selected {
func (c *Checkbox) icon(ctx Context) Image {
if c.Selected {
return GetOrCreateIcon(ctx, "ui-default-checkbox-selected", c.selectedIcon)
} else if c.over {
return GetOrCreateIcon(ctx, "ui-default-checkbox-hover", c.hoverIcon)
}
return c.getOrCreateNormalIcon(ctx)
}
func (c *Checkbox) getOrCreateNormalIcon(ctx Context) Image {
return GetOrCreateIcon(ctx, "ui-default-checkbox", c.normalIcon)
}
@ -47,6 +57,22 @@ func (c *Checkbox) iconBorder() geom.PolygonF32 {
)
}
func (c *Checkbox) checkMark() geom.PointsF32 {
return geom.PointsF32{
geom.PtF32(96, 256),
geom.PtF32(180, 340),
geom.PtF32(340, 150),
}
}
func (c *Checkbox) hoverIcon() IconPixelTestFn {
border := c.iconBorder()
check := c.checkMark()
return func(pt geom.PointF32) bool {
return (pt.DistanceToPolygon(border) < 48 && !pt.InPolygon(border)) || pt.DistanceToLines(check) < 24
}
}
func (c *Checkbox) normalIcon() IconPixelTestFn {
border := c.iconBorder()
return func(pt geom.PointF32) bool {
@ -56,11 +82,7 @@ func (c *Checkbox) normalIcon() IconPixelTestFn {
func (c *Checkbox) selectedIcon() IconPixelTestFn {
border := c.iconBorder()
check := geom.PointsF32{
geom.PtF32(84, 256),
geom.PtF32(180, 352),
geom.PtF32(352, 150),
}
check := c.checkMark()
return func(pt geom.PointF32) bool {
if pt.DistanceToPolygon(border) < 48 || pt.InPolygon(border) {
return pt.DistanceToLines(check) > 24
@ -76,6 +98,10 @@ func (c *Checkbox) Handle(ctx Context, e Event) {
case *MouseButtonDownEvent:
if e.Button == MouseButtonLeft && c.over {
c.Selected = !c.Selected
onSelectedChanged := c.onSelectedChanged
if onSelectedChanged != nil {
onSelectedChanged(ctx, c, c.Selected)
}
}
}
c.ControlBase.Handle(ctx, e)
@ -84,23 +110,25 @@ func (c *Checkbox) Handle(ctx Context, e Event) {
}
}
func (c *Checkbox) OnSelectedChanged(fn SelectedChangedFn) {
c.onSelectedChanged = fn
}
func (c *Checkbox) Render(ctx Context) {
c.RenderBackground(ctx)
var style = ctx.Style()
var palette = style.Palette
fore := c.FontColor(ctx)
size := c.desiredSize(ctx)
bounds := c.bounds
deltaX, deltaY := bounds.Dx()-size.X, bounds.Dy()-size.Y
bounds.Min.X += .5 * deltaX
bounds.Min.Y += .5 * deltaY
var pad = style.Dimensions.TextPadding
bounds = bounds.Inset(pad)
pos := bounds.Min
icon, _ := ctx.Images().ScaledHeight(c.icon(ctx, c.Selected), bounds.Dy())
icon, _ := ctx.Images().ScaledHeight(c.icon(ctx), bounds.Dy())
if icon != nil {
iconColor := fore
if c.Selected {
if c.Selected && c.Font.Color == nil {
iconColor = palette.Primary
}
ctx.Renderer().DrawImageOptions(icon, geom.PtF32(pos.X, pos.Y+.5*(bounds.Dy()-icon.Height())), DrawOptions{Tint: iconColor})