func TransparentWndProc(hwnd win.HWND, msg uint32, wParam, lParam uintptr) (result uintptr) {
switch msg {
case win.WM_CREATE:
//a := *(*uintptr)(unsafe.Pointer(lParam))
//fmt.Printf("WM_CREATE %v\n", a)
result = win.DefWindowProc(hwnd, msg, wParam, lParam)
//case win.WM_NCPAINT:
// result = win.DefWindowProc(hwnd, msg, wParam, lParam)
case win.WM_LBUTTONDOWN:
//fmt.Printf("WM_LBUTTONDOWN\n")
if isEnableDrag {
win.SetCapture(hwnd)
win.GetWindowRect(hwnd, &rcWindow)
win.GetCursorPos(&dragPoint)
isDrag = true
}
result = 0
case win.WM_LBUTTONUP:
if win.GetCapture() == hwnd {
win.ReleaseCapture()
}
isDrag = false
result = 0
case win.WM_NCCALCSIZE:
wpCaptionLess := uintptr(win.GetProp(hwnd, WindowProp_CaptionLess))
//fmt.Printf("wpCaptionLess=%v\n", wpCaptionLess)
if wpCaptionLess == 1 && win.BOOL(wParam) == win.TRUE {
var size_param *win.NCCALCSIZE_PARAMS = (*win.NCCALCSIZE_PARAMS)(unsafe.Pointer(lParam))
size_param.Rgrc[2] = size_param.Rgrc[1]
size_param.Rgrc[1] = size_param.Rgrc[0]
result = 0
} else {
result = win.DefWindowProc(hwnd, msg, wParam, lParam)
}
//case win.WM_NCHITTEST:
//x := win.LOWORD(uint32(lParam))
//y := win.HIWORD(uint32(lParam))
//s := fmt.Sprintf("WM_NCHITTEST x,y=%v,%v\n", x, y)
//result = win.DefWindowProc(hwnd, msg, wParam, lParam)
case win.WM_MOUSEMOVE:
//fmt.Printf("WM_MOUSEMOVE\n")
if isDrag {
var pe win.POINT
win.GetCursorPos(&pe) // The new position for cursor pointer
left := rcWindow.Left + (pe.X - dragPoint.X) // The horizontal position of the new window
top := rcWindow.Top + (pe.Y - dragPoint.Y) // The vertical position of the new windows
//win.MoveWindow(hwnd,reWindow.Left,reWindow.Top,reWindow.Right,reWindow.Bottom,true);// Moving window
win.SetWindowPos(hwnd, 0, left, top, 0, 0, win.SWP_NOSIZE|win.SWP_NOZORDER)
}
case win.WM_SIZE:
// 最小化时不能调整Cef窗体，否则恢复时界面一片空白
if wParam == win.SIZE_RESTORED || wParam == win.SIZE_MAXIMIZED {
cef.WindowResized(unsafe.Pointer(hwnd))
}
case win.WM_CLOSE:
win.DestroyWindow(hwnd)
case win.WM_DESTROY:
cef.QuitMessageLoop()
default:
result = win.DefWindowProc(hwnd, msg, wParam, lParam)
}
//result = win.DefWindowProc(hwnd, msg, wParam, lParam)
return
}
// 创建浏览器窗口
func (a *Application) CreateBrowserWindow(url string, captionless bool) (err error) {
var dwExStyle, dwStyle uint32 = 0, 0
var captionlessFlag uintptr = 0
fmt.Printf("CreateBrowserWindow url=%v captionless=%v\n", url, captionless)
if captionless {
captionlessFlag = 1
//dwExStyle = 0//win.WS_EX_LAYERED
// 无边框效果不错。但是不能移动
//dwStyle = win.WS_POPUP //& ^ (win.WS_CAPTION | win.WS_BORDER)
dwStyle = win.WS_MINIMIZEBOX | win.WS_MAXIMIZEBOX | win.WS_CAPTION | win.WS_CLIPCHILDREN |
win.WS_SYSMENU | win.WS_POPUP
} else {
dwStyle = win.WS_OVERLAPPEDWINDOW
}
if !manifest.FormFixed() {
dwStyle |= win.WS_SIZEBOX
}
// 获取屏幕宽度和高度
var x, y int32
var width, height int32
width = manifest.Width()
height = manifest.Height()
x = (win.GetSystemMetrics(win.SM_CXSCREEN) - width) / 2
y = (win.GetSystemMetrics(win.SM_CYSCREEN)-height)/2 - 2
renderWindow := win.CreateWindowEx(
dwExStyle,
syscall.StringToUTF16Ptr(nguiTransparentWindowClass),
nil,
dwStyle, //|win.WS_CLIPSIBLINGS,
x, //win.CW_USEDEFAULT,
y, //win.CW_USEDEFAULT,
width, //win.CW_USEDEFAULT,
height, //win.CW_USEDEFAULT,
0, //hwndParent
0,
0, //hInstance
nil)
if renderWindow == 0 {
err = errors.New("CreateWindowEx")
return
}
// 设置captionless标记
win.SetProp(renderWindow, WindowProp_CaptionLess, win.HANDLE(captionlessFlag))
if captionless {
/*
SetWindowLong(hWnd, GWL_STYLE,
GetWindowLong(hWnd, GWL_STYLE) & ~(WS_BORDER));
*/
// WS_BORDER Creates a window that has a border.创建一个有边界的窗口。
// WS_EX_CLIENTEDGE Specifies that a window has a 3D look — that is, a border with a sunken edge.指定窗口具有3D外观，也即是一个下层的边缘。
//gwlStyle := win.GetWindowLong(renderWindow, win.GWL_STYLE)
//gwlStyle &= ^(win.WS_BORDER)
//gwlStyle &= ^(win.WS_EX_CLIENTEDGE)
//win.SetWindowLong(renderWindow, win.GWL_STYLE, gwlStyle)
//gwlExStyle := win.GetWindowLong(renderWindow, win.GWL_EXSTYLE)
//gwlExStyle |= win.WS_EX_LAYERED;
//win.SetWindowLong(renderWindow, win.GWL_EXSTYLE, gwlExStyle)
// HWND hWnd: 窗口句柄
// COLORREF col: 透明化颜色
// byte bAlpha: ＝0：整个窗口透明, =255 完全不透明
// uint32 dwFlags: ＝1：仅颜色 col 透明， =2 :窗口按照bAlpha变量进行透明处理。
//win.SetLayeredWindowAttributes(renderWindow, win.BS_SOLID, 0, 2)
//win.UpdateWindow(renderWindow)
}
if captionless {
//win.MoveWindow(renderWindow, x, y, width, height, false)
//win.SetWindowPos(renderWindow, 0, x, y, width, height, win.SWP_NOZORDER|win.SWP_NOACTIVATE|win.SWP_NOSIZE)
win.SetWindowPos(renderWindow, 0, x, y, width, height, win.SWP_FRAMECHANGED)
} else {
win.MoveWindow(renderWindow, x, y, width, height, false)
}
fmt.Printf("CreateBrowserWindow x=%v, y=%v, width=%v, height=%v\n", x, y, width, height)
go func() {
//browser := cef.CreateBrowser(unsafe.Pointer(hwnd), &browserSettings, url, false)
browserSettings := cef.BrowserSettings{}
cef.CreateBrowser(unsafe.Pointer(renderWindow), &browserSettings, url, false)
//m_dwStyle = WS_CHILD | WS_CLIPCHILDREN | WS_CLIPSIBLINGS | WS_TABSTOP |
// WS_VISIBLE;
cef.WindowResized(unsafe.Pointer(renderWindow))
win.ShowWindow(renderWindow, win.SW_SHOW) //win.SW_SHOW
win.UpdateWindow(renderWindow)
//cef.WindowResized(unsafe.Pointer(renderWindow))
// It should be enough to call WindowResized after 10ms,
// though to be sure let's extend it to 100ms.
//time.AfterFunc(time.Millisecond*100, func() {
// cef.WindowResized(unsafe.Pointer(renderWindow))
//})
}()
return
}