AppUSBMouse.cpp

00001 /*
00002  *  Copyright 2014 Embedded Artists AB
00003  *
00004  *  Licensed under the Apache License, Version 2.0 (the "License");
00005  *  you may not use this file except in compliance with the License.
00006  *  You may obtain a copy of the License at
00007  *
00008  *    http://www.apache.org/licenses/LICENSE-2.0
00009  *
00010  *  Unless required by applicable law or agreed to in writing, software
00011  *  distributed under the License is distributed on an "AS IS" BASIS,
00012  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00013  *  See the License for the specific language governing permissions and
00014  *  limitations under the License.
00015  */
00016 
00017 
00018 #include "mbed.h"
00019 #include "AppUSBMouse.h"
00020 #include "lpc_swim_font.h"
00021 #include "lpc_colors.h"
00022 #include "USBMouse.h"
00023 
00024 /******************************************************************************
00025  * Defines and typedefs
00026  *****************************************************************************/
00027 
00028 /******************************************************************************
00029  * Local variables
00030  *****************************************************************************/
00031 
00032 
00033 /******************************************************************************
00034  * Private functions
00035  *****************************************************************************/
00036 
00037 void AppUSBMouse::draw()
00038 {
00039     // Prepare fullscreen
00040     swim_window_open(_win, 
00041                    _disp->width(), _disp->height(),         // full size
00042                    (COLOR_T*)_fb,
00043                    0,0,_disp->width()-1, _disp->height()-1, // window position and size
00044                    0,                                       // border
00045                    BLACK, WHITE, BLACK);                    // colors: pen, backgr, forgr
00046 
00047     swim_put_text_centered_win(_win, "(Move PC's cursor with touch display. Press USER button to exit)", _disp->height()-30);
00048 }
00049 
00050 /******************************************************************************
00051  * Public functions
00052  *****************************************************************************/
00053 
00054 AppUSBMouse::AppUSBMouse() : _disp(NULL), _win(NULL), _fb(NULL)
00055 {
00056   _coords[0].z = _coords[1].z = 0;
00057 }
00058 
00059 AppUSBMouse::~AppUSBMouse()
00060 {
00061     teardown();
00062 }
00063 
00064 bool AppUSBMouse::setup()
00065 {
00066     _disp = DMBoard::instance().display();
00067     _win = (SWIM_WINDOW_T*)malloc(sizeof(SWIM_WINDOW_T));
00068     _fb = _disp->allocateFramebuffer();
00069 
00070     return (_win != NULL && _fb != NULL);
00071 }
00072 
00073 void AppUSBMouse::runToCompletion()
00074 {
00075     bool done = false;
00076     uint32_t flags = 0;
00077     draw();
00078     void* oldFB = _disp->swapFramebuffer(_fb);
00079     
00080     DMBoard* board = &DMBoard::instance();
00081     RtosLog* log = board->logger();
00082     
00083     USBMouse mouse;
00084     
00085     // Wait for touches
00086     TouchPanel* touch = DMBoard::instance().touchPanel();
00087     int set = 0;
00088     touch_coordinate_t* last = NULL;
00089     touch_coordinate_t* current = &_coords[set];
00090     while(!done) {
00091       // wait for a new touch signal (signal is sent from AppLauncher,
00092       // which listens for touch events)
00093       flags = ThisThread::flags_wait_all_for(0x1, 50);
00094       if (flags == 0) {
00095         if (board->buttonPressed()) {
00096           done = true;
00097         }
00098       } else {
00099         if (touch->read(current, 1) == TouchPanel::TouchError_Ok) {
00100           if (current->z == 0) {
00101             // lifted the finger so we have to think of the next touch
00102             // event as the first one (otherwise the relative movement
00103             // will be wrong)
00104             last = NULL;
00105           }
00106           if (last != NULL) {
00107             int moveX = current->x - last->x;
00108             int moveY = current->y - last->y;
00109             if (moveX != 0 && moveY != 0) {
00110               mouse.move(current->x - last->x, current->y - last->y);
00111               //log->printf("{%3d,%3d} -> {%3d, %3d}\n", last->x, last->y, current->x, current->y);
00112               //log->printf("move(%4d, %4d)\n", moveX, moveY);
00113             }
00114           }
00115           last = current;
00116           current = &_coords[(++set)&1];
00117         }
00118       }
00119     }
00120     
00121     // User has clicked the button, restore the original FB
00122     _disp->swapFramebuffer(oldFB);
00123     swim_window_close(_win);
00124 }
00125 
00126 bool AppUSBMouse::teardown()
00127 {
00128     if (_win != NULL) {
00129         free(_win);
00130         _win = NULL;
00131     }
00132     if (_fb != NULL) {
00133         free(_fb);
00134         _fb = NULL;
00135     }
00136     return true;
00137 }