A basic graphics package for the LPC4088 Display Module.
Dependents: lpc4088_displaymodule_demo_sphere sampleGUI sampleEmptyGUI lpc4088_displaymodule_fs_aid ... more
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AppTouchCalibration.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 "AppTouchCalibration.h" 00020 #include "lpc_swim_font.h" 00021 00022 /****************************************************************************** 00023 * Defines and typedefs 00024 *****************************************************************************/ 00025 00026 #define BTN_OFF 20 00027 00028 /****************************************************************************** 00029 * Global variables 00030 *****************************************************************************/ 00031 00032 00033 /****************************************************************************** 00034 * Private functions 00035 *****************************************************************************/ 00036 00037 static void buttonClicked(uint32_t x) 00038 { 00039 bool* done = (bool*)x; 00040 *done = true; 00041 } 00042 00043 void AppTouchCalibration::draw() 00044 { 00045 // Prepare fullscreen 00046 swim_window_open(_win, 00047 _disp->width(), _disp->height(), // full size 00048 (COLOR_T*)_fb, 00049 0,0,_disp->width()-1, _disp->height()-1, // window position and size 00050 1, // border 00051 WHITE, WHITE, BLACK); // colors: pen, backgr, forgr 00052 swim_set_title(_win, "Touch Calibration", BLACK); 00053 00054 // Prepare status area in the middle 00055 swim_window_open(_msg, 00056 _disp->width(), _disp->height(), // full size 00057 (COLOR_T*)_fb, 00058 50,_disp->height()/2-15,_disp->width()-50, _disp->height()/2+15, // window position and size 00059 0, // border 00060 BLACK, WHITE, BLACK); // colors: pen, backgr, forgr 00061 00062 showStatus("Press the crosshairs in each of the corners"); 00063 00064 // Create (but don't show) the button 00065 _btn = new ImageButton(_win->fb, _win->xpmax - BTN_OFF - _resOk->width(), _win->ypmax - BTN_OFF - _resOk->height(), _resOk->width(), _resOk->height()); 00066 _btn->loadImages(_resOk); 00067 } 00068 00069 void AppTouchCalibration::drawMarker(uint16_t x, uint16_t y, bool erase) 00070 { 00071 // The markers must be drawn at exact locations to get a good calibration. 00072 // However the lpc_swim functions take the window's title bar into 00073 // consideration which will move them. To combat this the marker's 00074 // coordinates will have to be moved 00075 x -= _win->xpvmin; 00076 y -= _win->ypvmin; 00077 00078 swim_set_pen_color(_win, (erase ? _win->bkg : BLACK)); 00079 swim_put_line(_win, x-15, y, x+15, y); 00080 swim_put_line(_win, x, y-15, x, y+15); 00081 swim_put_circle(_win, x, y, 10, false); 00082 } 00083 00084 bool AppTouchCalibration::calibrate() 00085 { 00086 bool morePoints = true; 00087 bool lastPoint = false; 00088 uint16_t x, y; 00089 int point = 0; 00090 00091 do { 00092 if (_touch->calibrateStart() != TouchPanel::TouchError_Ok) { 00093 showStatus("Failed to start calibration\n"); 00094 break; 00095 } 00096 while (morePoints) { 00097 if (point++ > 0) { 00098 // erase old location 00099 drawMarker(x, y, true); 00100 } 00101 if (_touch->getNextCalibratePoint(&x, &y, &lastPoint) != TouchPanel::TouchError_Ok) { 00102 showStatus("Failed to get calibration point\n"); 00103 break; 00104 } 00105 drawMarker(x, y, false); 00106 if (lastPoint) { 00107 showStatus("Last calibration point. After this the data will"); 00108 showStatus("be saved, which can take a couple of seconds!", 1); 00109 } 00110 if (_touch->waitForCalibratePoint(&morePoints, 0) != TouchPanel::TouchError_Ok) { 00111 showStatus("Failed to get user click\n"); 00112 break; 00113 } 00114 } 00115 if (morePoints) { 00116 // aborted calibration due to error(s) 00117 break; 00118 } 00119 00120 // erase old location 00121 drawMarker(x, y, true); 00122 } while(0); 00123 00124 return !morePoints; 00125 } 00126 00127 void AppTouchCalibration::showStatus(const char* message, int line) 00128 { 00129 if (line == 0) { 00130 swim_clear_screen(_msg, _msg->bkg); 00131 swim_put_text_centered_win(_msg, message, 0); 00132 } else { 00133 swim_put_text_centered_win(_msg, message, line*swim_get_font_height(_msg)); 00134 } 00135 DMBoard::instance().logger()->printf("[CALIB] %s\n", message); 00136 } 00137 00138 /****************************************************************************** 00139 * Public functions 00140 *****************************************************************************/ 00141 00142 AppTouchCalibration::AppTouchCalibration() : _disp(NULL), _touch(NULL), 00143 _win(NULL), _fb(NULL), _btn(NULL), _resOk(NULL) 00144 { 00145 } 00146 00147 AppTouchCalibration::~AppTouchCalibration() 00148 { 00149 teardown(); 00150 } 00151 00152 bool AppTouchCalibration::setup() 00153 { 00154 _disp = DMBoard::instance().display(); 00155 _touch = DMBoard::instance().touchPanel(); 00156 _win = (SWIM_WINDOW_T*)malloc(sizeof(SWIM_WINDOW_T)); 00157 _msg = (SWIM_WINDOW_T*)malloc(sizeof(SWIM_WINDOW_T)); 00158 _fb = _disp->allocateFramebuffer(); 00159 00160 return (_win != NULL && _msg != NULL && _fb != NULL); 00161 } 00162 00163 void AppTouchCalibration::runToCompletion() 00164 { 00165 // Alternative 1: use the calling thread's context to run in 00166 bool done = false; 00167 draw(); 00168 _btn->setAction(buttonClicked, (uint32_t)&done); 00169 void* oldFB = _disp->swapFramebuffer(_fb); 00170 00171 // Run calibration 00172 if (calibrate()) { 00173 showStatus("Calibration Completed. Test to draw!"); 00174 _btn->draw(); 00175 } else { 00176 // Something went wrong. The error is already shown! 00177 // Without touch there is no point in continuing, ask 00178 // user to reset. 00179 00180 swim_put_text_centered_win(_win, "Without touch there is nothing to do. Press RESET !", 2*_disp->height()/3); 00181 while(1) { 00182 ThisThread::sleep_for(5000); 00183 } 00184 } 00185 00186 // Allow user to draw. Exit by pressing button 00187 swim_set_pen_color(_win, BLACK); 00188 touch_coordinate_t coord; 00189 while(!done) { 00190 // wait for a new touch signal (signal is sent from AppLauncher, 00191 // which listens for touch events) 00192 ThisThread::flags_wait_any(0x1); 00193 00194 if (_touch->read(coord) == TouchPanel::TouchError_Ok) { 00195 if (coord.z > 0) { 00196 //swim_put_pixel(_win, coord.x, coord.y); 00197 swim_put_box(_win, coord.x-1, coord.y-1, coord.x+1, coord.y+1); 00198 } 00199 if (_btn->handle(coord.x, coord.y, coord.z > 0)) { 00200 _btn->draw(); 00201 } 00202 } 00203 } 00204 00205 // User has clicked the button, restore the original FB 00206 _disp->swapFramebuffer(oldFB); 00207 swim_window_close(_win); 00208 swim_window_close(_msg); 00209 } 00210 00211 bool AppTouchCalibration::teardown() 00212 { 00213 if (_win != NULL) { 00214 free(_win); 00215 _win = NULL; 00216 } 00217 if (_msg != NULL) { 00218 free(_msg); 00219 _msg = NULL; 00220 } 00221 if (_fb != NULL) { 00222 free(_fb); 00223 _fb = NULL; 00224 } 00225 if (_btn != NULL) { 00226 delete _btn; 00227 _btn = NULL; 00228 } 00229 return true; 00230 } 00231 00232 void AppTouchCalibration::addResource(Resources id, Resource* res) 00233 { 00234 _resOk = res; 00235 }
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