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golfMouse.go
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golfMouse.go
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package golf
import (
"syscall/js"
)
//TODO change mouse dest location
// MouseBtn is a mouse key
type MouseBtn int
// MouseKey codes
const (
LeftClick = MouseBtn(0)
MiddleClick = MouseBtn(1)
RightClick = MouseBtn(2)
)
func (e *Engine) initMouseListener(canvas js.Value) {
mouseMove := js.FuncOf(func(this js.Value, args []js.Value) interface{} {
height := canvas.Get("offsetHeight").Int()
ratio := float64(ScreenHeight) / float64(height)
e.RAM[mouseX] = byte(args[0].Get("offsetX").Float() * ratio)
e.RAM[mouseY] = byte(args[0].Get("offsetY").Float() * ratio)
return nil
})
mouseDown := js.FuncOf(func(this js.Value, args []js.Value) interface{} {
k := MouseBtn(args[0].Get("button").Int())
if k == LeftClick {
btn := btnState(e.RAM[mouseBase] & 0b00000011)
if btn == unpressed {
e.RAM[mouseBase] |= byte(start)
}
}
if k == MiddleClick {
btn := btnState((e.RAM[mouseBase] & 0b00001100) >> 2)
if btn == unpressed {
e.RAM[mouseBase] |= (byte(start) << 2)
}
}
if k == RightClick {
btn := btnState((e.RAM[mouseBase] & 0b00110000) >> 4)
if btn == unpressed {
e.RAM[mouseBase] |= (byte(start) << 4)
}
}
return nil
})
mouseUp := js.FuncOf(func(this js.Value, args []js.Value) interface{} {
k := MouseBtn(args[0].Get("button").Int())
if k == LeftClick {
btn := btnState(e.RAM[mouseBase] & 0b00000011)
if btn == pressed || btn == start {
e.RAM[mouseBase] &= 0b11111100
e.RAM[mouseBase] |= byte(end)
}
}
if k == MiddleClick {
btn := btnState((e.RAM[mouseBase] & 0b00001100) >> 2)
if btn == pressed || btn == start {
e.RAM[mouseBase] &= 0b11110011
e.RAM[mouseBase] |= (byte(end) << 2)
}
}
if k == RightClick {
btn := btnState((e.RAM[mouseBase] & 0b00110000) >> 4)
if btn == pressed || btn == start {
e.RAM[mouseBase] &= 0b11001111
e.RAM[mouseBase] |= (byte(end) << 4)
}
}
return nil
})
canvas.Call("addEventListener", "mousemove", mouseMove)
canvas.Call("addEventListener", "mousedown", mouseDown)
canvas.Call("addEventListener", "mouseup", mouseUp)
}
func (e *Engine) tickMouse() {
// Move btn from start to pressed
if btnState(e.RAM[mouseBase]&0b00000011) == start {
e.RAM[mouseBase] &= 0b11111100
e.RAM[mouseBase] |= byte(pressed)
}
if btnState((e.RAM[mouseBase]&0b00001100)>>2) == start {
e.RAM[mouseBase] &= 0b11110011
e.RAM[mouseBase] |= (byte(pressed) << 2)
}
if btnState((e.RAM[mouseBase]&0b00110000)>>4) == start {
e.RAM[mouseBase] &= 0b11001111
e.RAM[mouseBase] |= (byte(pressed) << 4)
}
// Move from end to unpressed
if btnState(e.RAM[mouseBase]&0b00000011) == end {
e.RAM[mouseBase] &= 0b11111100
}
if btnState((e.RAM[mouseBase]&0b00001100)>>2) == end {
e.RAM[mouseBase] &= 0b11110011
}
if btnState((e.RAM[mouseBase]&0b00110000)>>4) == end {
e.RAM[mouseBase] &= 0b11001111
}
}
// Mbtn returns true is the mouse key is being pressed
func (e *Engine) Mbtn(key MouseBtn) bool {
btn := btnState(e.RAM[mouseBase] & 0b00000011)
if key == MiddleClick {
btn = btnState(e.RAM[mouseBase] & 0b00001100)
}
if key == RightClick {
btn = btnState(e.RAM[mouseBase] & 0b00110000)
}
if btn == start || btn == pressed {
return true
}
return false
}
// Mbtnp returns true if the mouse key was pressed this frame
func (e *Engine) Mbtnp(key MouseBtn) bool {
btn := btnState(e.RAM[mouseBase] & 0b00000011)
if key == MiddleClick {
btn = btnState(e.RAM[mouseBase] & 0b00001100)
}
if key == RightClick {
btn = btnState(e.RAM[mouseBase] & 0b00110000)
}
if btn == start {
return true
}
return false
}
// Mbtnr returns true if the mouse key was released this frame
func (e *Engine) Mbtnr(key MouseBtn) bool {
btn := btnState(e.RAM[mouseBase] & 0b00000011)
if key == MiddleClick {
btn = btnState(e.RAM[mouseBase] & 0b00001100)
}
if key == RightClick {
btn = btnState(e.RAM[mouseBase] & 0b00110000)
}
if btn == end {
return true
}
return false
}