/// <summary>
/// Browser initialized changed event handler.
/// </summary>
/// <param name="sender">
/// The sender.
/// </param>
/// <param name="eventArgs">
/// The event args.
/// </param>
private void IsBrowserInitializedChanged(object sender, IsBrowserInitializedChangedEventArgs eventArgs)
{
if (eventArgs.IsBrowserInitialized)
{
var size = GetClientSize();
Browser.SetSize(size.Width, size.Height);
Browser.IsBrowserInitializedChanged -= IsBrowserInitializedChanged;
Browser.GetBrowserHost().GetWindowHandle();
if (_hostConfig.HostPlacement.Frameless && _hostConfig.HostPlacement.FramelessOptions.IsDraggable)
{
ChromeWidgetMessageInterceptor.Setup(_interceptor, Handle, _hostConfig.HostPlacement.FramelessOptions, (message) =>
{
var msg = (WM)message.Value;
switch (msg)
{
case WM.LBUTTONDOWN:
User32Methods.ReleaseCapture();
NativeMethods.SendMessage(Handle, (int)WM.SYSCOMMAND, NativeMethods.SC_DRAGMOVE, 0);
break;
}
});
}
}
}
private void ChromeBrowser_IsBrowserInitializedChanged(object sender, IsBrowserInitializedChangedEventArgs e)
{
if (e.IsBrowserInitialized)
{
OnUILoaded?.Invoke(this);
}
ChromeWidgetMessageInterceptor.SetupLoop(ChromeBrowser, (m) =>
{
if (m.Msg == WM_LBUTTONDOWN)
{
Point point = new Point(m.LParam.ToInt32());
lastLocation = point;
if (((DragDropHandler)ChromeBrowser.DragHandler).draggableRegion.IsVisible(point))
{
ReleaseCapture();
if (Window.InvokeRequired)
{
Window.Invoke(new SendHandleMessageDelegate(() => { SendMessage(Window.Handle, WM_NCLBUTTONDOWN, HT_CAPTION, 0); }));
}
else
{
SendMessage(Window.Handle, WM_NCLBUTTONDOWN, HT_CAPTION, 0);
}
Console.WriteLine("[WM_LBUTTONDOWN]");
}
}
});
}
// 浏览器初始化完毕时执行
private void Browser_onIsBrowserInitializedChanged(object sender, IsBrowserInitializedChangedEventArgs args)
{
if (args.IsBrowserInitialized)
{
// 监听 CefSharp 的 Windows Message
ChromeWidgetMessageInterceptor.SetupLoop(browser, new Action <Message>(WndProc));
}
}
/// <summary>
/// The ChromiumWebBrowserControl does not fire MouseEnter/Move/Leave events, because Chromium handles these.
/// This method provides a demo of hooking the Chrome_RenderWidgetHostHWND handle to receive low level messages.
/// You can likely hook other window messages using this technique, drag/drop etc
/// </summary>
private void SetupMessageInterceptor()
{
if (messageInterceptor != null)
{
messageInterceptor.ReleaseHandle();
messageInterceptor = null;
}
IntPtr browserHandle = default(IntPtr);
Invoke(new Action(() => {
browserHandle = browser.Handle;
}));
Task.Run(() => {
try {
while (true)
{
IntPtr chromeWidgetHostHandle;
if (ChromeWidgetHandleFinder.TryFindHandle(browserHandle, out chromeWidgetHostHandle))
{
messageInterceptor = new ChromeWidgetMessageInterceptor((Control)browser, chromeWidgetHostHandle, message => {
// Render process switch happened, need to find the new handle
if (message.Msg == ViewTools.WM_DESTROY)
{
SetupMessageInterceptor();
return;
}
if (message.Msg == ViewTools.WM_LBUTTONDOWN)
{
Point point = new Point(message.LParam.ToInt32());
// handdles moving the window via -webkit-app-region: drag;
if (((DragHandler)browser.DragHandler).draggableRegion.IsVisible(point))
{
ViewTools.ReleaseCapture();
this.InvokeOnUiThreadIfRequired(() => {
Task.Run(() => ViewTools.SendMessage(Handle, ViewTools.WM_NCLBUTTONDOWN, ViewTools.HT_CAPTION, 0));
});
}
}
});
break;
}
else
{
// Chrome hasn't yet set up its message-loop window.
System.Threading.Thread.Sleep(10);
}
}
} catch {
// Errors are likely to occur if browser is disposed, and no good way to check from another thread
}
});
}
protected override void Dispose(bool disposing)
{
if (disposing)
{
if (components != null)
{
components.Dispose();
components = null;
}
if (messageInterceptor != null)
{
messageInterceptor.ReleaseHandle();
messageInterceptor = null;
}
}
base.Dispose(disposing);
}
// 浏览器初始化完毕时执行
private void Browser_onIsBrowserInitializedChanged(object sender, IsBrowserInitializedChangedEventArgs args)
{
if (args.IsBrowserInitialized)
{
// 设置鼠标按下操作
ChromeWidgetMessageInterceptor.SetupLoop(browser, (message) =>
{
var dragHandler = (DragDropHandler)browser.DragHandler;
if (!dragHandler.Enable)
{
return;
}
Point point = new Point(message.LParam.ToInt32());
if (dragHandler.draggableRegion != null && dragHandler.draggableRegion.IsVisible(point))
{
// 若现在鼠标指针在可拖动区域内
if (message.Msg == (int)WindowMessages.WM_LBUTTONDBLCLK) // 鼠标左键双击
{
form.BeginInvoke((MethodInvoker) delegate
{
form.ToggleMaximize();
});
}
else if (message.Msg == (int)WindowMessages.WM_LBUTTONDOWN) // 鼠标左键按下
{
form.BeginInvoke((MethodInvoker) delegate
{
NativeMethods.ReleaseCapture();
NativeMethods.SendMessage(form.Handle, (int)WindowMessages.WM_NCLBUTTONDOWN, (int)HitTestValues.HTCAPTION, 0); // 执行 模拟标题栏拖动
});
}
else if (message.Msg == (int)WindowMessages.WM_RBUTTONDOWN) // 鼠标右键按下
{
form.BeginInvoke((MethodInvoker) delegate
{
form.ShowSystemMenu(point);
});
}
}
});
}
}
/// <summary>
/// The browser created.
/// </summary>
/// <param name="sender">
/// The sender.
/// </param>
/// <param name="e">
/// The e.
/// </param>
private void OnBrowserCreated(object sender, EventArgs e)
{
_browserWindowHandle = Browser.CefBrowser.GetHost().GetWindowHandle();
if (_browserWindowHandle != IntPtr.Zero)
{
var size = GetClientSize();
NativeMethods.SetWindowPos(_browserWindowHandle, IntPtr.Zero, 0, 0, size.Width, size.Height, WindowPositionFlags.SWP_NOZORDER);
if (_hostConfig.HostPlacement.Frameless && _hostConfig.HostPlacement.FramelessOptions.IsDraggable)
{
ChromeWidgetMessageInterceptor.Setup(_interceptor, Handle, _hostConfig.HostPlacement.FramelessOptions, (message) =>
{
var msg = (WM)message.Value;
switch (msg)
{
case WM.LBUTTONDOWN:
User32Methods.ReleaseCapture();
NativeMethods.SendMessage(Handle, (int)WM.SYSCOMMAND, NativeMethods.SC_DRAGMOVE, 0);
break;
}
});
}
}
}
// 浏览器初始化完毕时执行
private void Browser_onIsBrowserInitializedChanged(object sender, IsBrowserInitializedChangedEventArgs args)
{
if (args.IsBrowserInitialized)
{
// 监听 CefSharp 的 Windows Message
ChromeWidgetMessageInterceptor.SetupLoop(browser, (message) =>
{
var dragHandler = (DragDropHandler)browser.DragHandler;
if (!dragHandler.Enable)
{
return;
}
Point point = new Point(message.LParam.ToInt32());
// 指定区域拖拽
if (dragHandler.draggableRegion != null && dragHandler.draggableRegion.IsVisible(point))
{
// 若现在鼠标指针在可拖动区域内
if (message.Msg == (int)WindowMessages.WM_LBUTTONDBLCLK) // 鼠标左键双击
{
form.BeginInvoke((MethodInvoker) delegate
{
form.ToggleMaximize();
});
}
else if (message.Msg == (int)WindowMessages.WM_LBUTTONDOWN) // 鼠标左键按下
{
form.BeginInvoke((MethodInvoker) delegate
{
NativeMethods.ReleaseCapture();
NativeMethods.SendMessage(form.Handle, (int)WindowMessages.WM_NCLBUTTONDOWN, (int)HitTestValues.HTCAPTION, 0); // 执行 模拟标题栏拖动
});
}
else if (message.Msg == (int)WindowMessages.WM_RBUTTONDOWN) // 鼠标右键按下
{
form.BeginInvoke((MethodInvoker) delegate
{
form.ShowSystemMenu(point);
});
}
}
else
{
// 拖拽改变窗口大小
const uint HTLEFT = 10;
const uint HTRIGHT = 11;
const uint HTBOTTOMRIGHT = 17;
const uint HTBOTTOM = 15;
const uint HTBOTTOMLEFT = 16;
const uint HTTOP = 12;
const uint HTTOPLEFT = 13;
const uint HTTOPRIGHT = 14;
const int RESIZE_HANDLE_SIZE = 5;
if (message.Msg == (int)WindowMessages.WM_MOUSEMOVE || message.Msg == (int)WindowMessages.WM_LBUTTONDOWN)
{
form.BeginInvoke((MethodInvoker) delegate
{
Size formSize = form.Size;
//Point screenPoint = new Point(message.LParam.ToInt32());
//Point clientPoint = form.PointToClient(screenPoint);
Dictionary <uint, Rectangle> boxes = new Dictionary <uint, Rectangle>()
{
{ HTBOTTOMLEFT, new Rectangle(0, formSize.Height - RESIZE_HANDLE_SIZE, RESIZE_HANDLE_SIZE, RESIZE_HANDLE_SIZE) },
{ HTBOTTOM, new Rectangle(RESIZE_HANDLE_SIZE, formSize.Height - RESIZE_HANDLE_SIZE, formSize.Width - 2 * RESIZE_HANDLE_SIZE, RESIZE_HANDLE_SIZE) },
{ HTBOTTOMRIGHT, new Rectangle(formSize.Width - RESIZE_HANDLE_SIZE, formSize.Height - RESIZE_HANDLE_SIZE, RESIZE_HANDLE_SIZE, RESIZE_HANDLE_SIZE) },
{ HTRIGHT, new Rectangle(formSize.Width - RESIZE_HANDLE_SIZE, RESIZE_HANDLE_SIZE, RESIZE_HANDLE_SIZE, formSize.Height - 2 * RESIZE_HANDLE_SIZE) },
{ HTTOPRIGHT, new Rectangle(formSize.Width - RESIZE_HANDLE_SIZE, 0, RESIZE_HANDLE_SIZE, RESIZE_HANDLE_SIZE) },
{ HTTOP, new Rectangle(RESIZE_HANDLE_SIZE, 0, formSize.Width - 2 * RESIZE_HANDLE_SIZE, RESIZE_HANDLE_SIZE) },
{ HTTOPLEFT, new Rectangle(0, 0, RESIZE_HANDLE_SIZE, RESIZE_HANDLE_SIZE) },
{ HTLEFT, new Rectangle(0, RESIZE_HANDLE_SIZE, RESIZE_HANDLE_SIZE, formSize.Height - 2 * RESIZE_HANDLE_SIZE) }
};
Dictionary <uint, Cursor> cursors = new Dictionary <uint, Cursor>()
{
{ HTBOTTOMLEFT, Cursors.SizeNESW },
{ HTBOTTOM, Cursors.SizeNS },
{ HTBOTTOMRIGHT, Cursors.SizeNWSE },
{ HTRIGHT, Cursors.SizeWE },
{ HTTOPRIGHT, Cursors.SizeNESW },
{ HTTOP, Cursors.SizeNS },
{ HTTOPLEFT, Cursors.SizeNWSE },
{ HTLEFT, Cursors.SizeWE }
};
// 判断此刻指针是否在 boxes 内
foreach (KeyValuePair <uint, Rectangle> hitBox in boxes)
{
if (hitBox.Value.Contains(point))
{
browser.Cursor = cursors[hitBox.Key]; // 设置指针图标
if (message.Msg == (int)WindowMessages.WM_LBUTTONDOWN)
{
NativeMethods.ReleaseCapture();
NativeMethods.SendMessage(form.Handle, (int)WindowMessages.WM_NCLBUTTONDOWN, (int)hitBox.Key, 0);
}
break;
}
}
});
return;
}
}
});
}
}
private void OnIsBrowserInitializedChanged(object sender, IsBrowserInitializedChangedEventArgs args)
{
if (args.IsBrowserInitialized)
{
//Get the underlying browser host wrapper
var browserHost = Browser.GetBrowser().GetHost();
var requestContext = browserHost.RequestContext;
string errorMessage;
// Browser must be initialized before getting/setting preferences
var success = requestContext.SetPreference("enable_do_not_track", true, out errorMessage);
if (!success)
{
this.InvokeOnUiThreadIfRequired(() => MessageBox.Show("Unable to set preference enable_do_not_track errorMessage: " + errorMessage));
}
//Example of disable spellchecking
//success = requestContext.SetPreference("browser.enable_spellchecking", false, out errorMessage);
var preferences = requestContext.GetAllPreferences(true);
var doNotTrack = (bool)preferences["enable_do_not_track"];
//Use this to check that settings preferences are working in your code
//success = requestContext.SetPreference("webkit.webprefs.minimum_font_size", 24, out errorMessage);
//If we're using CefSetting.MultiThreadedMessageLoop (the default) then to hook the message pump,
// which running in a different thread we have to use a NativeWindow
if (multiThreadedMessageLoopEnabled)
{
Task.Run(() =>
{
try
{
while (true)
{
IntPtr chromeWidgetHostHandle;
if (ChromeWidgetHandleFinder.TryFindHandle(browserHandle, out chromeWidgetHostHandle))
{
messageInterceptor = new ChromeWidgetMessageInterceptor((Control)Browser, chromeWidgetHostHandle, message =>
{
const int WM_MOUSEACTIVATE = 0x0021;
const int WM_NCLBUTTONDOWN = 0x00A1;
const int WM_LBUTTONDOWN = 0x0201;
if (message.Msg == WM_MOUSEACTIVATE)
{
// The default processing of WM_MOUSEACTIVATE results in MA_NOACTIVATE,
// and the subsequent mouse click is eaten by Chrome.
// This means any .NET ToolStrip or ContextMenuStrip does not get closed.
// By posting a WM_NCLBUTTONDOWN message to a harmless co-ordinate of the
// top-level window, we rely on the ToolStripManager's message handling
// to close any open dropdowns:
// http://referencesource.microsoft.com/#System.Windows.Forms/winforms/Managed/System/WinForms/ToolStripManager.cs,1249
var topLevelWindowHandle = message.WParam;
PostMessage(topLevelWindowHandle, WM_NCLBUTTONDOWN, IntPtr.Zero, IntPtr.Zero);
}
//Forward mouse button down message to browser control
//else if(message.Msg == WM_LBUTTONDOWN)
//{
// PostMessage(browserHandle, WM_LBUTTONDOWN, message.WParam, message.LParam);
//}
// The ChromiumWebBrowserControl does not fire MouseEnter/Move/Leave events, because Chromium handles these.
// However we can hook into Chromium's messaging window to receive the events.
//
//const int WM_MOUSEMOVE = 0x0200;
//const int WM_MOUSELEAVE = 0x02A3;
//
//switch (message.Msg) {
// case WM_MOUSEMOVE:
// Console.WriteLine("WM_MOUSEMOVE");
// break;
// case WM_MOUSELEAVE:
// Console.WriteLine("WM_MOUSELEAVE");
// break;
//}
});
break;
}
else
{
// Chrome hasn't yet set up its message-loop window.
Thread.Sleep(10);
}
}
}
catch
{
// Errors are likely to occur if browser is disposed, and no good way to check from another thread
}
});
}
}
}
