energy/cef/browser_window_drag_windows.go

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//----------------------------------------
//
// Copyright © yanghy. All Rights Reserved.
//
// Licensed under Apache License Version 2.0, January 2004
//
// https://www.apache.org/licenses/LICENSE-2.0
//
//----------------------------------------
//go:build windows
// +build windows
package cef
import (
"github.com/energye/energy/v2/cef/internal/ipc"
ipcArgument "github.com/energye/energy/v2/cef/ipc/argument"
"github.com/energye/energy/v2/consts/messages"
"github.com/energye/golcl/lcl/types"
"github.com/energye/golcl/lcl/win"
)
// 窗口拖拽JS扩展
func dragExtensionJS(frame *ICefFrame) {
var executeJS = `energyExtension.drag.setup();`
frame.ExecuteJavaScript(executeJS, "", 0)
}
// 窗口拖拽JS扩展处理器
// 1. 注册JS扩展到CEF, 注册鼠标事件通过本地函数在Go里处理鼠标事件
// 2. 通过IPC将鼠标消息发送到主进程主进程监听到消息处理鼠标事件
// 3. windows 使用win.api实现窗口拖拽
func dragExtensionHandler() {
energyExtensionHandler := V8HandlerRef.New()
energyExtensionHandler.Execute(func(name string, object *ICefV8Value, arguments *TCefV8ValueArray, retVal *ResultV8Value, exception *ResultString) bool {
if name == mouseDown || name == mouseUp {
return true
} else if name == mouseMove {
// caption move
message := &ipcArgument.List{
Id: -1,
BId: ipc.RenderChan().BrowserId(),
Name: internalIPCDRAG,
Data: &drag{T: dragMove},
}
ipc.RenderChan().IPC().Send(message.Bytes())
return true
} else if name == mouseDblClick {
// caption double click
message := &ipcArgument.List{
Id: -1,
BId: ipc.RenderChan().BrowserId(),
Name: internalIPCDRAG,
Data: &drag{T: dragDblClick},
}
ipc.RenderChan().IPC().Send(message.Bytes())
return true
} else if name == mouseResize {
// window border resize
htValue := arguments.Get(0)
ht := htValue.GetStringValue()
htValue.Free()
message := &ipcArgument.List{
Id: -1,
BId: ipc.RenderChan().BrowserId(),
Name: internalIPCDRAG,
Data: &drag{T: dragResize, HT: ht},
}
ipc.RenderChan().IPC().Send(message.Bytes())
return true
}
return false
})
RegisterExtension("energyExtension", string(ipc.IPCJS), energyExtensionHandler)
}
func (m *drag) drag() {
window := m.window.AsLCLBrowserWindow().BrowserWindow()
switch m.T {
case dragUp:
case dragDown:
case dragMove:
// 全屏时不能拖拽窗口
if window.IsFullScreen() {
return
}
// 此时是 down 事件, 拖拽窗口
if win.ReleaseCapture() {
win.PostMessage(m.window.Handle(), messages.WM_NCLBUTTONDOWN, messages.HTCAPTION, 0)
}
case dragResize:
if window.IsFullScreen() {
return
}
var borderHT uintptr
switch m.HT {
case "n-resize":
borderHT = messages.HTTOP
case "ne-resize":
borderHT = messages.HTTOPRIGHT
case "e-resize":
borderHT = messages.HTRIGHT
case "se-resize":
borderHT = messages.HTBOTTOMRIGHT
case "s-resize":
borderHT = messages.HTBOTTOM
case "sw-resize":
borderHT = messages.HTBOTTOMLEFT
case "w-resize":
borderHT = messages.HTLEFT
case "nw-resize":
borderHT = messages.HTTOPLEFT
}
if borderHT != 0 {
if win.ReleaseCapture() {
win.PostMessage(window.Handle(), messages.WM_NCLBUTTONDOWN, borderHT, 0)
}
}
case dragDblClick:
if window.WindowProperty().EnableWebkitAppRegionDClk {
if window.WindowState() == types.WsNormal {
window.SetWindowState(types.WsMaximized)
} else {
window.SetWindowState(types.WsNormal)
}
}
}
}