我需要在单声道csharp中实现全局挂钩，我读xkeyhook xkeyhookkeybord ...没有工作所有样本（ 徘徊我思考如何最好地实施.... 感谢*
public X11Hotkey(Gdk.Key key, Gdk.ModifierType modifiers)
{
this.key = key;
this.modifiers = modifiers;
Gdk.Window rootWin = Gdk.Global.DefaultRootWindow;
IntPtr xDisplay = GetXDisplay(rootWin);
this.keycode = XKeysymToKeycode(xDisplay, (int)this.key);
//here ask the filter
rootWin.AddFilter(new Gdk.FilterFunc(FilterFunction));
}
//function is not executed
private Gdk.FilterReturn FilterFunction(IntPtr xEvent, Gdk.Event evnt)
{
XKeyEvent xKeyEvent = (XKeyEvent)Marshal.PtrToStructure(
xEvent,
typeof(XKeyEvent));
if (xKeyEvent.type == KeyPress)
{
if (xKeyEvent.keycode == this.keycode
&& xKeyEvent.state == (uint)this.modifiers)
{
this.OnPressed(EventArgs.Empty);
}
}
return Gdk.FilterReturn.Continue;
}
过滤器没有返回甚至......该怎么办？
答案 0 :(得分：1)
public delegate void SpecialKeyPressedHandler(object o, SpecialKey key);
public enum SpecialKey
{
one = Gdk.Key.exclam,
two = Gdk.Key.at,
tree = Gdk.Key.numbersign,
four = Gdk.Key.dollar,
five = Gdk.Key.percent,
six = Gdk.Key.asciicircum,
seven = Gdk.Key.ampersand,
eight = Gdk.Key.asterisk,
nine = Gdk.Key.parenleft,
nul = Gdk.Key.parenright,
retu = Gdk.Key.Return
};
public class SpecialKeys
{
private Hashtable key_map = new Hashtable();
private Hashtable key_registrations = new Hashtable();
private IEnumerable keycode_list;
private TimeSpan raise_delay = new TimeSpan(0);
private DateTime last_raise = DateTime.MinValue;
public SpecialKeys()
{
Console.WriteLine("init");
keycode_list = BuildKeyCodeList();
InitializeKeys();
}
public void Dispose()
{
UnitializeKeys();
}
public void RegisterHandler(SpecialKeyPressedHandler handler, params SpecialKey [] specialKeys)
{
foreach(SpecialKey specialKey in specialKeys) {
if(key_map.Contains(specialKey)) {
int key = (int)key_map[specialKey];
key_registrations[key] = Delegate.Combine(key_registrations[key] as Delegate, handler);
}
}
}
public void UnregisterHandler(SpecialKeyPressedHandler handler, params SpecialKey [] specialKeys)
{
foreach(SpecialKey specialKey in specialKeys) {
if(key_map.Contains(specialKey)) {
int key = (int)key_map[specialKey];
key_registrations[key] = Delegate.Remove(key_registrations[key] as Delegate, handler);
}
}
}
private IEnumerable BuildKeyCodeList()
{
ArrayList kc_list = new ArrayList();
foreach(SpecialKey key in Enum.GetValues(typeof(SpecialKey))) {
IntPtr xdisplay = gdk_x11_get_default_xdisplay();
if(!xdisplay.Equals(IntPtr.Zero)) {
int keycode = XKeysymToKeycode(xdisplay, key);
if(keycode != 0) {
key_map[keycode] = key;
key_map[key] = keycode;
kc_list.Add(keycode);
}
}
}
return kc_list;
}
private void InitializeKeys()
{
for(int i = 0; i < Gdk.Display.Default.NScreens; i++) {
Gdk.Screen screen = Gdk.Display.Default.GetScreen(i);
foreach(int keycode in keycode_list) {
GrabKey(screen.RootWindow, keycode);
}
screen.RootWindow.AddFilter(FilterKey);
}
}
private void UnitializeKeys()
{
for(int i = 0; i < Gdk.Display.Default.NScreens; i++) {
Gdk.Screen screen = Gdk.Display.Default.GetScreen(i);
foreach(int keycode in keycode_list) {
UngrabKey(screen.RootWindow, keycode);
}
screen.RootWindow.RemoveFilter(FilterKey);
}
}
private void GrabKey(Gdk.Window root, int keycode)
{
IntPtr xid = gdk_x11_drawable_get_xid(root.Handle);
IntPtr xdisplay = gdk_x11_get_default_xdisplay();
gdk_error_trap_push();
XGrabKey(xdisplay, keycode, XModMask.None, xid, true, XGrabMode.Async, XGrabMode.Async);
XGrabKey(xdisplay, keycode, XModMask.Mod2, xid, true, XGrabMode.Async, XGrabMode.Async);
XGrabKey(xdisplay, keycode, XModMask.Mod5, xid, true, XGrabMode.Async, XGrabMode.Async);
XGrabKey(xdisplay, keycode, XModMask.Lock, xid, true, XGrabMode.Async, XGrabMode.Async);
XGrabKey(xdisplay, keycode, XModMask.Mod2 | XModMask.Mod5, xid, true, XGrabMode.Async, XGrabMode.Async);
XGrabKey(xdisplay, keycode, XModMask.Mod2 | XModMask.Lock, xid, true, XGrabMode.Async, XGrabMode.Async);
XGrabKey(xdisplay, keycode, XModMask.Mod5 | XModMask.Lock, xid, true, XGrabMode.Async, XGrabMode.Async);
XGrabKey(xdisplay, keycode, XModMask.Mod2 | XModMask.Mod5 | XModMask.Lock, xid, true,
XGrabMode.Async, XGrabMode.Async);
gdk_flush();
if(gdk_error_trap_pop() != 0) {
Console.Error.WriteLine(": Could not grab key {0} (maybe another application has grabbed this key)", keycode);
}
}
private void UngrabKey(Gdk.Window root, int keycode)
{
IntPtr xid = gdk_x11_drawable_get_xid(root.Handle);
IntPtr xdisplay = gdk_x11_get_default_xdisplay();
gdk_error_trap_push();
XUngrabKey(xdisplay, keycode, XModMask.None, xid);
XUngrabKey(xdisplay, keycode, XModMask.Mod2, xid);
XUngrabKey(xdisplay, keycode, XModMask.Mod5, xid);
XUngrabKey(xdisplay, keycode, XModMask.Lock, xid);
XUngrabKey(xdisplay, keycode, XModMask.Mod2 | XModMask.Mod5, xid);
XUngrabKey(xdisplay, keycode, XModMask.Mod2 | XModMask.Lock, xid);
XUngrabKey(xdisplay, keycode, XModMask.Mod5 | XModMask.Lock, xid);
XUngrabKey(xdisplay, keycode, XModMask.Mod2 | XModMask.Mod5 | XModMask.Lock,xid);
gdk_flush();
if(gdk_error_trap_pop() != 0) {
Console.Error.WriteLine(": Could not ungrab key {0} (maybe another application has grabbed this key)", keycode);
}
}
private Gdk.FilterReturn FilterKey(IntPtr xeventPtr, Gdk.Event gdkEvent)
{
Console.WriteLine("filter "+ gdkEvent.Type);
if(DateTime.Now - last_raise < raise_delay) {
return Gdk.FilterReturn.Continue;
}
last_raise = DateTime.Now;
XKeyEvent xevent = (XKeyEvent)Marshal.PtrToStructure(xeventPtr, typeof(XKeyEvent));
if(xevent.type != XEventName.KeyPress) {
return Gdk.FilterReturn.Continue;
}
int keycode = (int)xevent.keycode;
object x = key_map[keycode];
Console.WriteLine("filter "+ keycode);
if(x == null) {
return Gdk.FilterReturn.Continue;
}
SpecialKey key = (SpecialKey)key_map[keycode];
if(key_registrations[keycode] != null) {
x = key_registrations[keycode];
if(x is SpecialKeyPressedHandler) {
((SpecialKeyPressedHandler)x)(this, key);
}
return Gdk.FilterReturn.Remove;
}
return Gdk.FilterReturn.Continue;
}
public TimeSpan Delay {
get {
return raise_delay;
}
set {
raise_delay = value;
}
}
[StructLayout(LayoutKind.Sequential)]
private struct XKeyEvent
{
public XEventName type;
public IntPtr serial;
public bool send_event;
public IntPtr display;
public IntPtr window;
public IntPtr root;
public IntPtr subwindow;
public IntPtr time;
public int x;
public int y;
public int x_root;
public int x_y;
public uint state;
public uint keycode;
public bool same_screen;
}
[DllImport("libX11")]
private static extern int XKeysymToKeycode(IntPtr display, SpecialKey keysym);
[DllImport("libX11")]
private static extern void XGrabKey(IntPtr display, int keycode, XModMask modifiers,
IntPtr window, bool owner_events, XGrabMode pointer_mode, XGrabMode keyboard_mode);
[DllImport("libX11")]
private static extern void XUngrabKey(IntPtr display, int keycode, XModMask modifiers,
IntPtr window);
[DllImport("gdk-x11-2.0")]
private static extern IntPtr gdk_x11_drawable_get_xid(IntPtr window);
[DllImport("gdk-x11-2.0")]
private static extern IntPtr gdk_x11_get_default_xdisplay();
[DllImport("gdk-x11-2.0")]
private static extern void gdk_error_trap_push();
[DllImport("gdk-x11-2.0")]
private static extern int gdk_error_trap_pop();
[DllImport("gdk-x11-2.0")]
private static extern void gdk_flush();
[Flags]
private enum XModMask {
None = 0,
Shift = 1 << 0,
Lock = 1 << 1,
Control = 1 << 2,
Mod1 = 1 << 3,
Mod2 = 1 << 4,
Mod3 = 1 << 5,
Mod4 = 1 << 6,
Mod5 = 1 << 7
}
private enum XGrabMode {
Sync = 0,
Async = 1
}
private enum XEventName {
KeyPress = 2,
KeyRelease = 3,
}
}
所有工作！
答案 1 :(得分：0)
GDK过滤器不是设计为全局挂钩。在正常处理之前，他们只会向您提供已经发送到您的流程的事件。
要安排为您的流程提供特定组合键的键盘事件，请使用XGrabKey函数和根窗口。请注意，一些通常不被视为“修饰符”的东西，例如CapsLock，被X11视为修饰符，您需要获取要忽略的修饰符的所有可能配置。您可能还会发现this question有用。
X的设计并未考虑全局键盘或鼠标挂钩。虽然可以将所有事件传递给您的流程，但如果不干扰其他流程，则无法完成。