FreeRDP/client/X11/xf_input.c

250 lines
5.1 KiB
C

/**
* FreeRDP: A Remote Desktop Protocol Implementation
* X11 Input
*
* Copyright 2013 Corey Clayton <can.of.tuna@gmail.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <math.h>
#include "xf_input.h"
#define MAX_CONTACTS 2
typedef struct touch_contact
{
int id;
int count;
double pos_x;
double pos_y;
double last_x;
double last_y;
} touchContact;
touchContact contacts[MAX_CONTACTS];
int active_contacts;
int xinput_opcode; //TODO: use this instead of xfi
void xf_input_init(xfInfo* xfi)
{
int opcode, event, error;
int major = 2, minor = 2;
XIEventMask eventmask;
unsigned char mask[(XI_LASTEVENT + 7)/8];
active_contacts = 0;
ZeroMemory(contacts, sizeof(touchContact) * MAX_CONTACTS);
ZeroMemory(mask, sizeof(mask));
if (XQueryExtension(xfi->display, "XInputExtension", &opcode, &event, &error))
{
xfi->XInputOpcode = opcode;
XIQueryVersion(xfi->display, &major, &minor);
if (!(major * 1000 + minor < 2002))
{
eventmask.deviceid = XIAllDevices;
eventmask.mask_len = sizeof(mask);
eventmask.mask = mask;
XISetMask(mask, XI_TouchBegin);
XISetMask(mask, XI_TouchUpdate);
XISetMask(mask, XI_TouchEnd);
error = XISelectEvents(xfi->display, xfi->window->handle, &eventmask, 1);
switch (error)
{
case BadValue:
printf("\tBadValue\n");
break;
case BadWindow:
printf("\tBadWindow\n");
break;
case 0: //no error
break;
default:
printf("XISelectEvents() returned %d\n", error);
break;
}
}
else
{
printf("Server does not support XI 2.2\n");
}
}
else
{
printf("X Input extension not available!!!\n");
}
}
void xf_input_handle_event(xfInfo* xfi, XEvent* event)
{
//handle touch events
XGenericEventCookie* cookie = &event->xcookie;
printf("event: %p\n", event);
XGetEventData(xfi->display, cookie);
if ( (cookie->type == GenericEvent) &&
(cookie->extension == xfi->XInputOpcode) )
{
switch(cookie->evtype)
{
case XI_TouchBegin:
xf_input_touch_begin(xfi, cookie->data);
break;
case XI_TouchUpdate:
xf_input_touch_update(xfi, cookie->data);
break;
case XI_TouchEnd:
xf_input_touch_end(xfi, cookie->data);
break;
default:
printf("unhandled xi type= %d\n", cookie->evtype);
break;
}
}
XFreeEventData(xfi->display,cookie);
}
void xf_input_touch_begin(xfInfo* xfi, XIDeviceEvent* event)
{
int i;
//find an empty slot and save it
for(i=0; i<MAX_CONTACTS; i++)
{
if(contacts[i].id == 0)
{
contacts[i].id = event->detail;
contacts[i].count = 1;
contacts[i].pos_x = event->event_x;
contacts[i].pos_y = event->event_y;
active_contacts++;
break;
}
}
////
printf("\tTouchBegin (%d) [%.2f,%.2f]\n",
event->detail,
event->event_x,
event->event_y);
printf("state: a=%d", active_contacts);
printf("c0=[%d, %d, %.2f, %.2f, %.2f, %.2f]", contacts[0].id, contacts[0].count,contacts[0].pos_x, contacts[0].pos_y, contacts[0].last_x, contacts[0].last_y );
printf("c0=[%d, %d, %.2f, %.2f, %.2f, %.2f]", contacts[1].id, contacts[1].count,contacts[1].pos_x, contacts[1].pos_y, contacts[1].last_x, contacts[1].last_y );
}
void xf_input_touch_update(xfInfo* xfi, XIDeviceEvent* event)
{
int i;
for(i=0; i<MAX_CONTACTS; i++)
{
if(contacts[i].id == event->detail)
{
contacts[i].count++;
contacts[i].last_x = contacts[i].pos_x;
contacts[i].last_y = contacts[i].pos_y;
contacts[i].pos_x = event->event_x;
contacts[i].pos_y = event->event_y;
//detect pinch-zoom
if(active_contacts == 2)
{
int j = 0;
//find the other nonzero contact
for(j=0; j<MAX_CONTACTS; j++)
{
if( (contacts[j].id != 0) && (contacts[j].id != contacts[i].id) )
{
double delta;
//now compute the delta
delta = sqrt(pow(contacts[j].pos_x - contacts[i].last_x, 2.0) +
pow(contacts[j].pos_y - contacts[i].last_y, 2.0));
printf("delta = %.2f\n", delta);
break;
}
}
}
break;
}
}
printf("\tTouchUpdate (%d) [%.2f,%.2f]\n",
event->detail,
event->event_x,
event->event_y);
}
void xf_input_touch_end(xfInfo* xfi, XIDeviceEvent* event)
{
int i;
//find our and delete the point
for(i=0; i<MAX_CONTACTS; i++)
{
if(contacts[i].id == event->detail)
{
contacts[i].id = 0;
contacts[i].count = 0;
//contacts[i].pos_x = (int)event->event_x;
//contacts[i].pos_y = (int)event->event_y;
active_contacts--;
break;
}
}
printf("\tTouchEnd (%d) [%.2f,%.2f]\n",
event->detail,
event->event_x,
event->event_y);
}