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tomo-old/elements/testing/mouse.go

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package testing
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import "image"
import "image/color"
import "git.tebibyte.media/sashakoshka/tomo"
import "git.tebibyte.media/sashakoshka/tomo/theme"
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import "git.tebibyte.media/sashakoshka/tomo/artist"
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import "git.tebibyte.media/sashakoshka/tomo/elements/core"
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// Mouse is an element capable of testing mouse input. When the mouse is clicked
// and dragged on it, it draws a trail.
type Mouse struct {
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*core.Core
core core.CoreControl
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drawing bool
color artist.Pattern
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lastMousePos image.Point
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}
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// NewMouse creates a new mouse test element.
func NewMouse () (element *Mouse) {
element = &Mouse { }
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element.Core, element.core = core.NewCore(element)
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element.core.SetMinimumSize(32, 32)
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element.color = artist.NewUniform(color.Black)
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return
}
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func (element *Mouse) Resize (width, height int) {
element.core.AllocateCanvas(width, height)
artist.FillRectangle (
element.core,
theme.AccentPattern(),
element.Bounds())
artist.StrokeRectangle (
element.core,
artist.NewUniform(color.Black), 1,
element.Bounds())
artist.Line (
element.core, artist.NewUniform(color.White), 3,
image.Pt(1, 1),
image.Pt(width - 2, height - 2))
artist.Line (
element.core, artist.NewUniform(color.White), 1,
image.Pt(1, height - 2),
image.Pt(width - 2, 1))
}
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func (element *Mouse) HandleMouseDown (x, y int, button tomo.Button) {
element.drawing = true
element.lastMousePos = image.Pt(x, y)
}
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func (element *Mouse) HandleMouseUp (x, y int, button tomo.Button) {
element.drawing = false
mousePos := image.Pt(x, y)
element.core.PushRegion (artist.Line (
element.core, element.color, 1,
element.lastMousePos, mousePos))
element.lastMousePos = mousePos
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}
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func (element *Mouse) HandleMouseMove (x, y int) {
if !element.drawing { return }
mousePos := image.Pt(x, y)
element.core.PushRegion (artist.Line (
element.core, element.color, 1,
element.lastMousePos, mousePos))
element.lastMousePos = mousePos
}
func (element *Mouse) HandleScroll (x, y int, deltaX, deltaY float64) { }