113 lines
2.7 KiB
Go
113 lines
2.7 KiB
Go
package ui
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import (
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"fmt"
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"image/color"
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"github.com/llgcode/draw2d/draw2dimg"
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"github.com/llgcode/draw2d/draw2dkit"
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"opslag.de/schobers/geom"
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"opslag.de/schobers/zntg/allg5"
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)
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type CheckboxValueChangedFn func(bool)
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func drawCheckedBitmap(fill, stroke color.Color) *allg5.Bitmap {
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return drawBitmap(checkboxSize, checkboxSize, func(gc *draw2dimg.GraphicContext) {
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var size float64 = checkboxSize
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var margin float64 = checkboxMargin
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gc.SetFillColor(fill)
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draw2dkit.RoundedRectangle(gc, margin, margin, size-margin, size-margin, margin, margin)
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gc.Fill()
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gc.SetStrokeColor(stroke)
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gc.SetLineWidth(1.5)
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gc.MoveTo(7, 12)
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gc.LineTo(10.5, 15.5)
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gc.LineTo(17, 9)
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gc.Stroke()
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})
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}
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func drawUncheckedBitmap(fill, stroke color.Color) *allg5.Bitmap {
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return drawBitmap(checkboxSize, checkboxSize, func(gc *draw2dimg.GraphicContext) {
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var size float64 = checkboxSize
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var margin float64 = checkboxMargin
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gc.SetLineWidth(2)
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gc.SetStrokeColor(stroke)
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draw2dkit.RoundedRectangle(gc, margin+1, margin+1, size-margin-1, size-margin-1, margin-1, margin-1)
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gc.Stroke()
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})
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}
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type Checkbox struct {
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ControlBase
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Value bool
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Text string
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OnChanged CheckboxValueChangedFn
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checked *allg5.Bitmap
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unchecked *allg5.Bitmap
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}
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func (c *Checkbox) Created(ctx Context, p Container) error {
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var err = c.ControlBase.Created(ctx, p)
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if nil != err {
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return err
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}
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var plt = ctx.Palette()
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c.checked = drawCheckedBitmap(plt.Primary(), plt.Lightest())
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c.unchecked = drawUncheckedBitmap(plt.Lightest(), plt.Darkest())
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if nil == c.checked || nil == c.unchecked {
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return fmt.Errorf("error creating checkboxes")
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}
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return nil
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}
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func (c *Checkbox) Handle(ctx Context, ev allg5.Event) {
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var pressed = c.IsPressed
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c.ControlBase.Handle(ctx, ev)
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switch ev.(type) {
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case *allg5.MouseButtonUpEvent:
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if !c.Disabled && pressed && c.IsOver {
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c.Value = !c.Value
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var onChanged = c.OnChanged
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if nil != onChanged {
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onChanged(c.Value)
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}
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}
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}
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}
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func (c *Checkbox) DesiredSize(ctx Context) geom.PointF32 {
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var fonts = ctx.Fonts()
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var fnt = fonts.Get("default")
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var w = fnt.TextWidth(c.Text)
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return geom.PtF32(w+checkboxSize, checkboxSize)
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}
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func (c *Checkbox) box() *allg5.Bitmap {
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if c.Value {
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return c.checked
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}
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return c.unchecked
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}
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func (c *Checkbox) Render(ctx Context) {
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var fonts = ctx.Fonts()
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var min = c.Bounds.Min
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var fnt = fonts.Get("default")
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fnt.Draw(min.X+checkboxSize, min.Y-.67*fnt.Ascent()+.5*checkboxSize, ctx.Palette().Darkest(), allg5.AlignLeft, c.Text)
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if c.Disabled {
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var disabled = ctx.Palette().Disabled()
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c.box().DrawOptions(min.X, min.Y, allg5.DrawOptions{Tint: &disabled})
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} else {
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c.box().Draw(min.X, min.Y)
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}
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c.ControlBase.Render(ctx)
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}
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