85 lines
1.7 KiB
Go
85 lines
1.7 KiB
Go
|
// Copyright 2011 The Walk Authors. All rights reserved.
|
||
|
|
// Use of this source code is governed by a BSD-style
|
||
|
|
// license that can be found in the LICENSE file.
|
||
|
|
|
||
|
|
// +build windows
|
||
|
|
|
||
|
|
package walk
|
||
|
|
|
||
|
|
import (
|
||
|
|
"github.com/lxn/win"
|
||
|
|
)
|
||
|
|
|
||
|
|
type MouseButton int
|
||
|
|
|
||
|
|
const (
|
||
|
|
LeftButton MouseButton = win.MK_LBUTTON
|
||
|
|
RightButton MouseButton = win.MK_RBUTTON
|
||
|
|
MiddleButton MouseButton = win.MK_MBUTTON
|
||
|
|
)
|
||
|
|
|
||
|
|
type mouseEventHandlerInfo struct {
|
||
|
|
handler MouseEventHandler
|
||
|
|
once bool
|
||
|
|
}
|
||
|
|
|
||
|
|
// MouseEventHandler is called for mouse events. x and y are measured in native pixels.
|
||
|
|
type MouseEventHandler func(x, y int, button MouseButton)
|
||
|
|
|
||
|
|
type MouseEvent struct {
|
||
|
|
handlers []mouseEventHandlerInfo
|
||
|
|
}
|
||
|
|
|
||
|
|
func (e *MouseEvent) Attach(handler MouseEventHandler) int {
|
||
|
|
handlerInfo := mouseEventHandlerInfo{handler, false}
|
||
|
|
|
||
|
|
for i, h := range e.handlers {
|
||
|
|
if h.handler == nil {
|
||
|
|
e.handlers[i] = handlerInfo
|
||
|
|
return i
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
e.handlers = append(e.handlers, handlerInfo)
|
||
|
|
|
||
|
|
return len(e.handlers) - 1
|
||
|
|
}
|
||
|
|
|
||
|
|
func (e *MouseEvent) Detach(handle int) {
|
||
|
|
e.handlers[handle].handler = nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func (e *MouseEvent) Once(handler MouseEventHandler) {
|
||
|
|
i := e.Attach(handler)
|
||
|
|
e.handlers[i].once = true
|
||
|
|
}
|
||
|
|
|
||
|
|
type MouseEventPublisher struct {
|
||
|
|
event MouseEvent
|
||
|
|
}
|
||
|
|
|
||
|
|
func (p *MouseEventPublisher) Event() *MouseEvent {
|
||
|
|
return &p.event
|
||
|
|
}
|
||
|
|
|
||
|
|
// Publish publishes mouse event. x and y are measured in native pixels.
|
||
|
|
func (p *MouseEventPublisher) Publish(x, y int, button MouseButton) {
|
||
|
|
for i, h := range p.event.handlers {
|
||
|
|
if h.handler != nil {
|
||
|
|
h.handler(x, y, button)
|
||
|
|
|
||
|
|
if h.once {
|
||
|
|
p.event.Detach(i)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func MouseWheelEventDelta(button MouseButton) int {
|
||
|
|
return int(int32(button) >> 16)
|
||
|
|
}
|
||
|
|
|
||
|
|
func MouseWheelEventKeyState(button MouseButton) int {
|
||
|
|
return int(int32(button) & 0xFFFF)
|
||
|
|
}
|