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rui/demo/pointerEventsDemo.go

130 lines
3.5 KiB
Go

package main
import (
"fmt"
"strconv"
"strings"
"github.com/anoshenko/rui"
)
const pointerEventsDemoText = `
GridLayout {
width = 100%, height = 100%, cell-height = "1fr, auto",
content = [
GridLayout {
padding = 12px,
content = [
GridLayout {
id = pointerEventsTest, cell-horizontal-align = center, cell-vertical-align = center,
border = _{ style = solid, width = 1px, color = gray},
content = [
TextView {
id = pointerEventsText, text = "Test box",
}
]
}
],
},
Resizable {
row = 1, side = top, background-color = lightgrey, height = 200px,
content = EditView {
id = pointerEventsLog, type = multiline, read-only = true, wrap = true,
}
},
]
}
`
func createPointerEventsDemo(session rui.Session) rui.View {
view := rui.CreateViewFromText(session, pointerEventsDemoText)
if view == nil {
return nil
}
addToLog := func(tag string, event rui.PointerEvent) {
var buffer strings.Builder
appendBool := func(name string, value bool) {
buffer.WriteString(`, `)
buffer.WriteString(name)
if value {
buffer.WriteString(` = true`)
} else {
buffer.WriteString(` = false`)
}
}
appendInt := func(name string, value int) {
buffer.WriteString(`, `)
buffer.WriteString(name)
buffer.WriteString(` = `)
buffer.WriteString(strconv.Itoa(value))
}
appendFloat := func(name string, value float64) {
buffer.WriteString(fmt.Sprintf(`, %s = %g`, name, value))
}
appendPoint := func(name string, x, y float64) {
buffer.WriteString(fmt.Sprintf(`, %s = (%g:%g)`, name, x, y))
}
buffer.WriteString(tag)
buffer.WriteString(`: TimeStamp = `)
buffer.WriteString(strconv.FormatUint(event.TimeStamp, 10))
appendInt("Button", event.Button)
appendInt("Buttons", event.Buttons)
appendPoint("(X:Y)", event.X, event.Y)
appendPoint("Client (X:Y)", event.ClientX, event.ClientY)
appendPoint("Screen (X:Y)", event.ScreenX, event.ScreenY)
appendFloat("Width", event.Width)
appendFloat("Height", event.Height)
appendFloat("Pressure", event.Pressure)
appendFloat("TangentialPressure", event.TangentialPressure)
appendFloat("TiltX", event.TiltX)
appendFloat("TiltY", event.TiltY)
appendFloat("Twist", event.Twist)
buffer.WriteString(`, PointerType = `)
buffer.WriteString(event.PointerType)
appendBool("IsPrimary", event.IsPrimary)
appendBool("CtrlKey", event.CtrlKey)
appendBool("ShiftKey", event.ShiftKey)
appendBool("AltKey", event.AltKey)
appendBool("MetaKey", event.MetaKey)
buffer.WriteString(";\n\n")
rui.AppendEditText(view, "pointerEventsLog", buffer.String())
rui.ScrollViewToEnd(view, "pointerEventsLog")
}
rui.SetParams(view, "pointerEventsTest", rui.Params{
rui.PointerDown: func(v rui.View, event rui.PointerEvent) {
addToLog("pointer-down", event)
},
rui.PointerUp: func(v rui.View, event rui.PointerEvent) {
addToLog("pointer-up", event)
},
rui.PointerOut: func(v rui.View, event rui.PointerEvent) {
addToLog("pointer-out", event)
rui.Set(view, "pointerEventsText", rui.Text, "Pointer out")
},
rui.PointerOver: func(v rui.View, event rui.PointerEvent) {
addToLog("pointer-over", event)
},
rui.PointerCancel: func(v rui.View, event rui.PointerEvent) {
addToLog("pointer-cancel", event)
},
rui.PointerMove: func(v rui.View, event rui.PointerEvent) {
rui.Set(view, "pointerEventsText", rui.Text,
fmt.Sprintf("(X:Y): (%g : %g)<br>Client (X:Y): (%g : %g)<br>Screen (X:Y): (%g : %g)",
event.X, event.Y, event.ClientX, event.ClientY, event.ScreenX, event.ScreenY))
},
})
return view
}