AppColorPicker.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 "EthernetInterface.h"
00020 #include "AppColorPicker.h"
00021 #include "lpc_swim_font.h"
00022 
00023 
00024 /******************************************************************************
00025  * Defines and typedefs
00026  *****************************************************************************/
00027  
00028 #define BOX_SIDE   192
00029  
00030 #define BTN_OFF    20
00031  
00032 /******************************************************************************
00033  * Global variables
00034  *****************************************************************************/
00035 
00036 /******************************************************************************
00037  * Private functions
00038  *****************************************************************************/
00039 
00040 static void buttonClicked(uint32_t x)
00041 {
00042   bool* done = (bool*)x;
00043   *done = true;
00044 }
00045 
00046 void AppColorPicker::draw()
00047 {
00048     // Prepare fullscreen
00049     swim_window_open(_win, 
00050                    _disp->width(), _disp->height(),         // full size
00051                    _fb,
00052                    0,0,_disp->width()-1, _disp->height()-1, // window position and size
00053                    1,                                       // border
00054                    WHITE, WHITE, BLACK);                    // colors: pen, backgr, forgr
00055     swim_set_title(_win, "Color Picker", BLACK);
00056 
00057     swim_window_open(_colorwin, 
00058                      _disp->width(), _disp->height(),         // full size
00059                      _fb,
00060                      50,(_disp->height()-BOX_SIDE)/2,50+BOX_SIDE-1, BOX_SIDE+(_disp->height()-BOX_SIDE)/2,                 // window position and size
00061                      0,                                       // border
00062                      WHITE, WHITE, BLACK);                    // colors: pen, backgr, forgr
00063     
00064 
00065     uint16_t r, g, b;
00066     uint16_t rx = BOX_SIDE/32;
00067     uint16_t bx = BOX_SIDE/32;
00068     uint16_t gy = BOX_SIDE/64;
00069     uint16_t color;
00070     for (int x = 0; x < BOX_SIDE; x++) {
00071         r = (x/rx);
00072         b = 0x1f - (x/bx);
00073         color = ((r & 0x1f) << 11) | ((b & 0x1f) << 0);
00074         for (int y = 0; y < BOX_SIDE; y++) {
00075             g = (y/gy);
00076             _colorwin->pen = color | ((g & 0x3f) << 5);
00077             swim_put_pixel(_colorwin, x, y);
00078         }
00079     }
00080     
00081     _btn = new ImageButton(_win->fb, _win->xpmax - BTN_OFF - _resOk->width(), _win->ypmax - BTN_OFF - _resOk->height(), _resOk->width(), _resOk->height());
00082     _btn->loadImages(_resOk);
00083     _btn->draw();
00084     
00085     // Copy everything onto the back buffer
00086     memcpy(_fb2, _fb, _disp->fbSize());
00087 }
00088 
00089 /******************************************************************************
00090  * Public functions
00091  *****************************************************************************/
00092 
00093 AppColorPicker::AppColorPicker() : _disp(NULL), _win(NULL), _colorwin(NULL), 
00094   _fb(NULL), _fb2(NULL), _btn(NULL), _resOk(NULL)
00095 {
00096     if (DMBoard::instance().display()->width() == 480) {
00097         _resultX = 350; 
00098         _resultY = 70; 
00099         _resultW = 80; 
00100         _resultH = 80;
00101     } else {
00102         _resultW = 80*2; 
00103         _resultH = 80*2;
00104         _resultX = 350;
00105         _resultY = (DMBoard::instance().display()->height() - (_resultH + 50))/2; 
00106     }
00107 }
00108 
00109 AppColorPicker::~AppColorPicker()
00110 {
00111     teardown();
00112 }
00113 
00114 bool AppColorPicker::setup()
00115 {
00116     _disp = DMBoard::instance().display();
00117     _win = (SWIM_WINDOW_T*)malloc(sizeof(SWIM_WINDOW_T));
00118     _colorwin = (SWIM_WINDOW_T*)malloc(sizeof(SWIM_WINDOW_T));
00119     _fb = (COLOR_T*)_disp->allocateFramebuffer();
00120     _fb2 = (COLOR_T*)_disp->allocateFramebuffer();
00121 
00122     return (_win != NULL && _colorwin != NULL && _fb != NULL && _fb2 != NULL);
00123 }
00124 
00125 void AppColorPicker::runToCompletion()
00126 {
00127     bool done = false;
00128     draw();
00129     _btn->setAction(buttonClicked, (uint32_t)&done);
00130     void* oldFB = _disp->swapFramebuffer(_fb2);
00131     
00132     // Wait for touches
00133     TouchPanel* touch = DMBoard::instance().touchPanel();
00134     touch_coordinate_t coord;
00135     char buf[10];
00136     swim_set_pen_color(_win, BLACK);
00137     bool showingFB2 = true;
00138     COLOR_T lastColor = WHITE;
00139     while(!done) {
00140       // wait for a new touch signal (signal is sent from AppLauncher,
00141       // which listens for touch events)
00142       ThisThread::flags_wait_any(0x1);
00143       if (touch->read(coord) == TouchPanel::TouchError_Ok) {
00144         if (coord.z > 0 &&
00145             coord.x >= _colorwin->xpmin && coord.x <= _colorwin->xpmax && 
00146             coord.y >= _colorwin->ypmin && coord.y <= _colorwin->ypmax) {
00147             int x = coord.x - _colorwin->xpmin;
00148             int y = coord.y - _colorwin->ypmin;
00149             COLOR_T c = ((x/(BOX_SIDE/32))<<11) | ((y/(BOX_SIDE/64))<<5) | ((0x1f-(x/(BOX_SIDE/32)))<<0);
00150           if (c != lastColor) {
00151             swim_set_fill_color(_win, c);
00152             swim_put_box(_win, _resultX, _resultY, _resultX+_resultW, _resultY+_resultH);
00153             sprintf(buf, "0x%04x  ", c);
00154             swim_put_text_xy(_win, buf, _resultX, _resultY+_resultH+10);
00155                 
00156             // Swap what is shown and what is drawn on
00157             if (showingFB2) {
00158               _disp->setFramebuffer(_fb);
00159               _win->fb = _fb2;
00160             } else {
00161               _disp->setFramebuffer(_fb2);
00162               _win->fb = _fb;
00163             }
00164             ThisThread::sleep_for(20);
00165             showingFB2 = !showingFB2;
00166             lastColor = c;
00167           }
00168         }
00169         if (_btn->handle(coord.x, coord.y, coord.z > 0)) {
00170             _btn->draw(showingFB2 ? _fb2 : _fb);
00171         }
00172       }
00173     }
00174     
00175     // User has clicked the button, restore the original FB
00176     _disp->swapFramebuffer(oldFB);
00177     swim_window_close(_win);
00178     swim_window_close(_colorwin);
00179 }
00180 
00181 bool AppColorPicker::teardown()
00182 {
00183     if (_win != NULL) {
00184         free(_win);
00185         _win = NULL;
00186     }
00187     if (_colorwin != NULL) {
00188         free(_colorwin);
00189         _colorwin = NULL;
00190     }
00191     if (_fb != NULL) {
00192         free(_fb);
00193         _fb = NULL;
00194     }
00195     if (_fb2 != NULL) {
00196         free(_fb2);
00197         _fb2 = NULL;
00198     }
00199     if (_btn != NULL) {
00200         delete _btn;
00201         _btn = NULL;
00202     }
00203     return true;
00204 }
00205 
00206 void AppColorPicker::addResource(Resources id, Resource* res)
00207 {
00208     _resOk = res;
00209 }