Click or drag to resize

KeyboardHandlerOnPreKeyEvent Method

Version 112.3.0
Called before a keyboard event is sent to the renderer. Return true if the event was handled or false otherwise. If the event will be handled in OnKeyEvent(IWebBrowser, IBrowser, KeyType, Int32, Int32, CefEventFlags, Boolean) as a keyboard shortcut set isKeyboardShortcut to true and return false.

Namespace:  CefSharp.Handler
Assembly:  CefSharp (in CefSharp.dll) Version: 112.3.0.0 (112.3.0.0)
Syntax
Copy
protected virtual bool OnPreKeyEvent(
	IWebBrowser chromiumWebBrowser,
	IBrowser browser,
	KeyType type,
	int windowsKeyCode,
	int nativeKeyCode,
	CefEventFlags modifiers,
	bool isSystemKey,
	ref bool isKeyboardShortcut
)

Parameters

chromiumWebBrowser
Type: CefSharpIWebBrowser
the ChromiumWebBrowser control
browser
Type: CefSharpIBrowser
The browser instance.
type
Type: CefSharpKeyType
Whether this was a key up/down/raw/etc...
windowsKeyCode
Type: SystemInt32
The Windows key code for the key event. This value is used by the DOM specification. Sometimes it comes directly from the event (i.e. on Windows) and sometimes it's determined using a mapping function. See WebCore/platform/chromium/KeyboardCodes.h for the list of values.
nativeKeyCode
Type: SystemInt32
The native key code. On Windows this appears to be in the format of WM_KEYDOWN/WM_KEYUP/etc... lParam data.
modifiers
Type: CefSharpCefEventFlags
What other modifier keys are currently down: Shift/Control/Alt/OS X Command/etc...
isSystemKey
Type: SystemBoolean
Indicates whether the event is considered a "system key" event (see http://msdn.microsoft.com/en-us/library/ms646286(VS.85).aspx for details).
isKeyboardShortcut
Type: SystemBoolean
See the summary for an explanation of when to set this to true.

Return Value

Type: Boolean
Returns true if the event was handled or false otherwise.
See Also