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