gdkinput-x11.c

linux下电话本所依赖的一些图形库

				 gint             *axis_data,
				 gdouble          *axis_out,
				 gdouble          *x_out,
				 gdouble          *y_out)
{
  GdkWindowImplX11 *impl;
  int i;
  int x_axis = 0;
  int y_axis = 0;

  double device_width, device_height;
  double x_offset, y_offset, x_scale, y_scale;

  impl = GDK_WINDOW_IMPL_X11 (((GdkWindowObject *) input_window->window)->impl);

  for (i=0; i<gdkdev->info.num_axes; i++)
    {
      switch (gdkdev->info.axes[i].use)
	{
	case GDK_AXIS_X:
	  x_axis = i;
	  break;
	case GDK_AXIS_Y:
	  y_axis = i;
	  break;
	default:
	  break;
	}
    }
  
  device_width = gdkdev->axes[x_axis].max_value - 
		   gdkdev->axes[x_axis].min_value;
  device_height = gdkdev->axes[y_axis].max_value - 
                    gdkdev->axes[y_axis].min_value;

  if (gdkdev->info.mode == GDK_MODE_SCREEN) 
    {
      x_scale = gdk_screen_get_width (gdk_drawable_get_screen (input_window->window)) / device_width;
      y_scale = gdk_screen_get_height (gdk_drawable_get_screen (input_window->window)) / device_height;

      x_offset = - input_window->root_x;
      y_offset = - input_window->root_y;
    }
  else				/* GDK_MODE_WINDOW */
    {
      double x_resolution = gdkdev->axes[x_axis].resolution;
      double y_resolution = gdkdev->axes[y_axis].resolution;
      double device_aspect;
      /* 
       * Some drivers incorrectly report the resolution of the device
       * as zero (in partiular linuxwacom < 0.5.3 with usb tablets).
       * This causes the device_aspect to become NaN and totally
       * breaks windowed mode.  If this is the case, the best we can
       * do is to assume the resolution is non-zero is equal in both
       * directions (which is true for many devices).  The absolute
       * value of the resolution doesn't matter since we only use the
       * ratio.
       */
      if ((x_resolution == 0) || (y_resolution == 0))
	{
	  x_resolution = 1;
	  y_resolution = 1;
	}
      device_aspect = (device_height*y_resolution) /
        (device_width*x_resolution);
      if (device_aspect * impl->width >= impl->height)
	{
	  /* device taller than window */
	  x_scale = impl->width / device_width;
	  y_scale = (x_scale * x_resolution)
	    / y_resolution;

	  x_offset = 0;
	  y_offset = -(device_height * y_scale - 
			       impl->height)/2;
	}
      else
	{
	  /* window taller than device */
	  y_scale = impl->height / device_height;
	  x_scale = (y_scale * y_resolution)
	    / x_resolution;

	  y_offset = 0;
	  x_offset = - (device_width * x_scale - impl->width)/2;
	}
    }

  for (i=0; i<gdkdev->info.num_axes; i++)
    {
      switch (gdkdev->info.axes[i].use)
	{
	case GDK_AXIS_X:
	  axis_out[i] = x_offset + x_scale * axis_data[x_axis];
	  if (x_out)
	    *x_out = axis_out[i];
	  break;
	case GDK_AXIS_Y:
	  axis_out[i] = y_offset + y_scale * axis_data[y_axis];
	  if (y_out)
	    *y_out = axis_out[i];
	  break;
	default:
	  axis_out[i] =
	    (gdkdev->info.axes[i].max * (axis_data[i] - gdkdev->axes[i].min_value) +
	     gdkdev->info.axes[i].min * (gdkdev->axes[i].max_value - axis_data[i])) /
	    (gdkdev->axes[i].max_value - gdkdev->axes[i].min_value);
	  break;
	}
    }
}

/* combine the state of the core device and the device state
 * into one - for now we do this in a simple-minded manner -
 * we just take the keyboard portion of the core device and
 * the button portion (all of?) the device state.
 * Any button remapping should go on here.
 */
static guint
gdk_input_translate_state(guint state, guint device_state)
{
  return device_state | (state & 0xFF);
}


gboolean
_gdk_input_common_other_event (GdkEvent         *event,
			       XEvent           *xevent,
			       GdkInputWindow   *input_window,
			       GdkDevicePrivate *gdkdev)
{
  if ((xevent->type == gdkdev->buttonpress_type) ||
      (xevent->type == gdkdev->buttonrelease_type)) 
    {
      XDeviceButtonEvent *xdbe = (XDeviceButtonEvent *)(xevent);

      if (xdbe->type == gdkdev->buttonpress_type)
	{
	  event->button.type = GDK_BUTTON_PRESS;
	  gdkdev->button_state |= 1 << xdbe->button;
	}
      else
	{
	  event->button.type = GDK_BUTTON_RELEASE;
	  gdkdev->button_state &= ~(1 << xdbe->button);
	}
      event->button.device = &gdkdev->info;
      event->button.window = input_window->window;
      event->button.time = xdbe->time;

      event->button.axes = g_new (gdouble, gdkdev->info.num_axes);
      gdk_input_translate_coordinates (gdkdev,input_window, xdbe->axis_data,
				       event->button.axes, 
				       &event->button.x,&event->button.y);
      event->button.x_root = event->button.x + input_window->root_x;
      event->button.y_root = event->button.y + input_window->root_y;
      event->button.state = gdk_input_translate_state(xdbe->state,xdbe->device_state);
      event->button.button = xdbe->button;

      GDK_NOTE (EVENTS,
	g_print ("button %s:\t\twindow: %ld  device: %ld  x,y: %f %f  button: %d\n",
		 (event->button.type == GDK_BUTTON_PRESS) ? "press" : "release",
		 xdbe->window,
		 xdbe->deviceid,
		 event->button.x, event->button.y,
		 xdbe->button));

      /* Update the timestamp of the latest user interaction, if the event has
       * a valid timestamp.
       */
      if (gdk_event_get_time (event) != GDK_CURRENT_TIME)
        gdk_x11_window_set_user_time (gdk_window_get_toplevel (input_window->window),
                                      gdk_event_get_time (event));
      return TRUE;
  }

  if ((xevent->type == gdkdev->keypress_type) ||
      (xevent->type == gdkdev->keyrelease_type))
    {
      XDeviceKeyEvent *xdke = (XDeviceKeyEvent *)(xevent);

      GDK_NOTE (EVENTS,
	g_print ("device key %s:\twindow: %ld  device: %ld  keycode: %d\n",
		 (event->key.type == GDK_KEY_PRESS) ? "press" : "release",
		 xdke->window,
		 xdke->deviceid,
		 xdke->keycode));

      if (xdke->keycode < gdkdev->min_keycode ||
	  xdke->keycode >= gdkdev->min_keycode + gdkdev->info.num_keys)
	{
	  g_warning ("Invalid device key code received");
	  return FALSE;
	}
      
      event->key.keyval = gdkdev->info.keys[xdke->keycode - gdkdev->min_keycode].keyval;

      if (event->key.keyval == 0) 
	{
	  GDK_NOTE (EVENTS,
	    g_print ("\t\ttranslation - NONE\n"));
	  
	  return FALSE;
	}

      event->key.type = (xdke->type == gdkdev->keypress_type) ?
	GDK_KEY_PRESS : GDK_KEY_RELEASE;

      event->key.window = input_window->window;
      event->key.time = xdke->time;

      event->key.state = gdk_input_translate_state(xdke->state, xdke->device_state)
	| gdkdev->info.keys[xdke->keycode - gdkdev->min_keycode].modifiers;

      /* Add a string translation for the key event */
      if ((event->key.keyval >= 0x20) && (event->key.keyval <= 0xFF))
	{
	  event->key.length = 1;
	  event->key.string = g_new (gchar, 2);
	  event->key.string[0] = (gchar)event->key.keyval;
	  event->key.string[1] = 0;
	}
      else
	{
	  event->key.length = 0;
	  event->key.string = g_new0 (gchar, 1);
	}

      GDK_NOTE (EVENTS,
	g_print ("\t\ttranslation - keyval: %d modifiers: %#x\n",
		 event->key.keyval,
		 event->key.state));

      /* Update the timestamp of the latest user interaction, if the event has
       * a valid timestamp.
       */
      if (gdk_event_get_time (event) != GDK_CURRENT_TIME)
        gdk_x11_window_set_user_time (gdk_window_get_toplevel (input_window->window),
                                      gdk_event_get_time (event));
      return TRUE;
    }

  if (xevent->type == gdkdev->motionnotify_type) 
    {
      XDeviceMotionEvent *xdme = (XDeviceMotionEvent *)(xevent);

      event->motion.device = &gdkdev->info;
      
      event->motion.axes = g_new (gdouble, gdkdev->info.num_axes);
      gdk_input_translate_coordinates(gdkdev,input_window,xdme->axis_data,
				      event->motion.axes,
				      &event->motion.x,&event->motion.y);
      event->motion.x_root = event->motion.x + input_window->root_x;
      event->motion.y_root = event->motion.y + input_window->root_y;

      event->motion.type = GDK_MOTION_NOTIFY;
      event->motion.window = input_window->window;
      event->motion.time = xdme->time;
      event->motion.state = gdk_input_translate_state(xdme->state,
						      xdme->device_state);
      event->motion.is_hint = xdme->is_hint;

      GDK_NOTE (EVENTS,
	g_print ("motion notify:\t\twindow: %ld  device: %ld  x,y: %f %f  state %#4x  hint: %s\n",
		 xdme->window,
		 xdme->deviceid,
		 event->motion.x, event->motion.y,
		 event->motion.state,
		 (xdme->is_hint) ? "true" : "false"));
      
      
      /* Update the timestamp of the latest user interaction, if the event has
       * a valid timestamp.
       */
      if (gdk_event_get_time (event) != GDK_CURRENT_TIME)
        gdk_x11_window_set_user_time (gdk_window_get_toplevel (input_window->window),
                                      gdk_event_get_time (event));
      return TRUE;
    }

  if (xevent->type == gdkdev->proximityin_type ||
      xevent->type == gdkdev->proximityout_type)
    {
      XProximityNotifyEvent *xpne = (XProximityNotifyEvent *)(xevent);

      event->proximity.device = &gdkdev->info;
      event->proximity.type = (xevent->type == gdkdev->proximityin_type)?
  	GDK_PROXIMITY_IN:GDK_PROXIMITY_OUT;
      event->proximity.window = input_window->window;
      event->proximity.time = xpne->time;
      
      /* Update the timestamp of the latest user interaction, if the event has
       * a valid timestamp.
       */
      if (gdk_event_get_time (event) != GDK_CURRENT_TIME)
        gdk_x11_window_set_user_time (gdk_window_get_toplevel (input_window->window),
                                      gdk_event_get_time (event));
      return TRUE;
  }

  return FALSE;			/* wasn't one of our event types */
}

gboolean
_gdk_device_get_history (GdkDevice         *device,
			 GdkWindow         *window,
			 guint32            start,
			 guint32            stop,
			 GdkTimeCoord    ***events,
			 gint              *n_events)
{
  GdkTimeCoord **coords;
  XDeviceTimeCoord *device_coords;
  GdkInputWindow *input_window;
  GdkDevicePrivate *gdkdev;
  gint mode_return;
  gint axis_count_return;
  gint i;

  gdkdev = (GdkDevicePrivate *)device;
  input_window = _gdk_input_window_find (window);

  g_return_val_if_fail (input_window != NULL, FALSE);

  device_coords = XGetDeviceMotionEvents (GDK_WINDOW_XDISPLAY (window),
					  gdkdev->xdevice,
					  start, stop,
					  n_events, &mode_return,
					  &axis_count_return);

  if (device_coords)
    {
      coords = _gdk_device_allocate_history (device, *n_events);
      
      for (i=0; i<*n_events; i++)
	gdk_input_translate_coordinates (gdkdev, input_window,
					 device_coords[i].data,
					 coords[i]->axes, NULL, NULL);
      XFreeDeviceMotionEvents (device_coords);

      *events = coords;

      return TRUE;
    }
  else
    return FALSE;
}

void 
gdk_device_get_state (GdkDevice       *device,
		      GdkWindow       *window,
		      gdouble         *axes,
		      GdkModifierType *mask)
{
  gint i;

  g_return_if_fail (device != NULL);
  g_return_if_fail (GDK_IS_WINDOW (window));

  if (GDK_IS_CORE (device))
    {
      gint x_int, y_int;
      
      gdk_window_get_pointer (window, &x_int, &y_int, mask);

      if (axes)
	{
	  axes[0] = x_int;
	  axes[1] = y_int;
	}
    }
  else
    {
      GdkDevicePrivate *gdkdev;
      GdkInputWindow *input_window;
      XDeviceState *state;
      XInputClass *input_class;
      
      if (mask)
	gdk_window_get_pointer (window, NULL, NULL, mask);
      
      gdkdev = (GdkDevicePrivate *)device;
      input_window = _gdk_input_window_find (window);
      g_return_if_fail (input_window != NULL);

      state = XQueryDeviceState (GDK_WINDOW_XDISPLAY (window),
				 gdkdev->xdevice);
      input_class = state->data;
      for (i=0; i<state->num_classes; i++)
	{
	  switch (input_class->class)
	    {
	    case ValuatorClass:
	      if (axes)
		gdk_input_translate_coordinates (gdkdev, input_window,
						 ((XValuatorState *)input_class)->valuators,
						 axes, NULL, NULL);
	      break;
	      
	    case ButtonClass:
	      if (mask)
		{
		  *mask &= 0xFF;
		  if (((XButtonState *)input_class)->num_buttons > 0)
		    *mask |= ((XButtonState *)input_class)->buttons[0] << 7;
		  /* GDK_BUTTON1_MASK = 1 << 8, and button n is stored
		   * in bit 1<<(n%8) in byte n/8. n = 1,2,... */
		}
	      break;
	    }
	  input_class = (XInputClass *)(((char *)input_class)+input_class->length);
	}
      XFreeDeviceState (state);
    }
}

#define __GDK_INPUT_X11_C__
#include "gdkaliasdef.c"