On Screen Keyboard Problem

[cutie.monkey]

hi all!

i'm currently developing an on screen keyboard to be use for my touch screen application. i'm using qt 3.3 in unix/x11.

i have already a keyboard layout, and codes with in the keyboard keys. i used XSendEvent() function to send an event.

all the letters from a-z and special characters works fine, except for the function keys f1-f12, tab, enter and arrow keys.

heres my code in creating event:

XKeyEvent createKeyEvent(Display *display, Window &win,
                         Window &winRoot, bool press,
                         int keycode, int modifiers)
{
	XKeyEvent event;
 
	event.display     = display;
	event.window      = win;
	event.root        = winRoot;
	event.subwindow   = None;
	event.time        = CurrentTime;
	event.x           = 1;
	event.y           = 1;
	event.x_root      = 1;
	event.y_root      = 1;
	event.same_screen = TRUE;
	event.state       = modifiers;
	event.keycode     = XKeysymToKeycode(display,keycode);
	if(press)
		event.type = KeyPress;
	else
		event.type = KeyRelease;
 
	return event;
}

XKeyEvent createKeyEvent(Display *display, Window &win,
                         Window &winRoot, bool press,
                         int keycode, int modifiers)
{
	XKeyEvent event;
	
	event.display     = display;
	event.window      = win;
	event.root        = winRoot;
	event.subwindow   = None;
	event.time        = CurrentTime;
	event.x           = 1;
	event.y           = 1;
	event.x_root      = 1;
	event.y_root      = 1;
	event.same_screen = TRUE;
	event.state       = modifiers;
	event.keycode     = XKeysymToKeycode(display,keycode);
	if(press)
		event.type = KeyPress;
	else
		event.type = KeyRelease;

	return event;
}

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for the sendkey event:

int tsKeyboardWidget::SendKeys(int keycode)
 {
 	//modifier=pubModifier->text().toInt();
// Obtain the X11 display.
	Display *display = XOpenDisplay(NULL);
	if(display == NULL)
		return -1;
 
// Get the root window for the current display.
	Window winRoot;// = XRootWindow(display,1);
 
// Find the window which has the current keyboard focus.
	Window winFocus;
	int revert=RevertToParent;
	//int RevertToParent=0;
	XGetInputFocus(display, &winFocus,&revert);
	winFocus=winFocus+1;
 
 
// Send a fake key press event to the window.
	XSelectInput(display, winFocus,FocusChangeMask|KeyPressMask|KeyReleaseMask);
	XMapWindow(display, winFocus);
 
 	XKeyEvent event = createKeyEvent(display, winFocus, winRoot, true, keycode, modifier);
 
 	XSendEvent(event.display, event.window, True, KeyPressMask, (XEvent *)&event);
 
	event = createKeyEvent(display, winFocus, winRoot, false, keycode, modifier);
	XSendEvent(event.display, event.window, True, KeyPressMask, (XEvent *)&event);
	XCloseDisplay(display);
	return 0;
}

int tsKeyboardWidget::SendKeys(int keycode)
 {
 	//modifier=pubModifier->text().toInt();
// Obtain the X11 display.
	Display *display = XOpenDisplay(NULL);
	if(display == NULL)
		return -1;

// Get the root window for the current display.
	Window winRoot;// = XRootWindow(display,1);

// Find the window which has the current keyboard focus.
	Window winFocus;
	int revert=RevertToParent;
	//int RevertToParent=0;
	XGetInputFocus(display, &winFocus,&revert);
	winFocus=winFocus+1;


// Send a fake key press event to the window.
	XSelectInput(display, winFocus,FocusChangeMask|KeyPressMask|KeyReleaseMask);
	XMapWindow(display, winFocus);

 	XKeyEvent event = createKeyEvent(display, winFocus, winRoot, true, keycode, modifier);

 	XSendEvent(event.display, event.window, True, KeyPressMask, (XEvent *)&event);

	event = createKeyEvent(display, winFocus, winRoot, false, keycode, modifier);
	XSendEvent(event.display, event.window, True, KeyPressMask, (XEvent *)&event);
	XCloseDisplay(display);
	return 0;
}

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for button press, for example when i press the button A.

void tsKeyboardWidget::btnA_clicked()
{
	SendKeys(Qt::Key_A);
 
}

void tsKeyboardWidget::btnA_clicked()
{
	SendKeys(Qt::Key_A);

}

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when i send Qt::Key_A it works.

my problem is, when i send the Qt::Key_Tab or Qt::Key_Enter, nothing happens.

is there something wrong with code? or is there another way to send the TAB or ENTER key as what the real keyboard does?

thnks...

[luf]

Hi

Qt::Key_Tab isn't the same as keycode required in createKeyEvent.

The keycodes on X11 can be found here:
http://cvsweb.xfree86.org/cvsweb/xc/....h?rev=1.1.1.4

You need to either make a mapping between QT::Key_XX and XK_XX, or use XK_XX directly.

cheers,
leif