AppTemplate.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 "AppTemplate.h"
00020 #include "lpc_swim_font.h"
00021 #include "lpc_colors.h"
00022 #include "image_data.h"
00023 
00024 /******************************************************************************
00025  * Defines and typedefs
00026  *****************************************************************************/
00027  
00028 #define BTN_WIDTH  65
00029 #define BTN_HEIGHT 40
00030 #define BTN_OFF    20
00031 
00032 /******************************************************************************
00033  * Local variables
00034  *****************************************************************************/
00035 
00036 
00037 /******************************************************************************
00038  * Private functions
00039  *****************************************************************************/
00040 
00041 static void buttonClicked(uint32_t x)
00042 {
00043   bool* done = (bool*)x;
00044   *done = true;
00045 }
00046 
00047 void AppTemplate::draw()
00048 {
00049     // Prepare fullscreen
00050     swim_window_open(_win, 
00051                    _disp->width(), _disp->height(),         // full size
00052                    (COLOR_T*)_fb,
00053                    0,0,_disp->width()-1, _disp->height()-1, // window position and size
00054                    0,                                       // border
00055                    BLUE, WHITE, BLACK);                    // colors: pen, backgr, forgr
00056     
00057     // Show a message
00058     swim_put_text_xy(_win, "Hello World!", 100, 100);
00059     
00060     // Create the OK button that will end this application
00061     _btn = new ImageButton(_win->fb, _win->xpmax - BTN_OFF - BTN_WIDTH, _win->ypmax - BTN_OFF - BTN_HEIGHT, BTN_WIDTH, BTN_HEIGHT);
00062     _btn->loadImages(img_ok, img_size_ok);
00063     _btn->draw();
00064 }
00065 
00066 /******************************************************************************
00067  * Public functions
00068  *****************************************************************************/
00069 
00070 AppTemplate::AppTemplate() : _disp(NULL), _win(NULL), _fb(NULL), _btn(NULL)
00071 {
00072 }
00073 
00074 AppTemplate::~AppTemplate()
00075 {
00076     teardown();
00077 }
00078 
00079 bool AppTemplate::setup()
00080 {
00081     _disp = DMBoard::instance().display();
00082     _win = (SWIM_WINDOW_T*)malloc(sizeof(SWIM_WINDOW_T));
00083     _fb = _disp->allocateFramebuffer();
00084 
00085     return (_win != NULL && _fb != NULL);
00086 }
00087 
00088 void AppTemplate::runToCompletion()
00089 {
00090     // Draw on the frame buffer
00091     draw();
00092     
00093     // Configure the button to call buttonClicked() when clicked
00094     bool done = false;
00095     _btn->setAction(buttonClicked, (uint32_t)&done);
00096     
00097     // Switch to "our" frame buffer, but save the old one so it can be 
00098     // restored when we exit our application
00099     void* oldFB = _disp->swapFramebuffer(_fb);
00100     
00101     TouchPanel* touch = DMBoard::instance().touchPanel();
00102     touch_coordinate_t coord;
00103     while(!done) {
00104       // wait for a new touch signal (signal is sent from AppLauncher,
00105       // which listens for touch events)
00106       ThisThread::flags_wait_all(0x1);
00107       if (touch->read(coord) == TouchPanel::TouchError_Ok) {
00108         
00109         // you can do something where with the touch event if you like
00110         // for example
00111         //
00112         //  swim_put_circle(_win, coord.x, coord.y, 2, 1);
00113         //
00114         
00115         
00116         // See if the touch event effects the button
00117         if (_btn->handle(coord.x, coord.y, coord.z > 0)) {
00118           _btn->draw();
00119         }
00120       }
00121     }
00122     
00123     // User has clicked the button, restore the original frame buffer
00124     _disp->swapFramebuffer(oldFB);
00125     swim_window_close(_win);
00126 }
00127 
00128 bool AppTemplate::teardown()
00129 {
00130     if (_win != NULL) {
00131         free(_win);
00132         _win = NULL;
00133     }
00134     if (_fb != NULL) {
00135         free(_fb);
00136         _fb = NULL;
00137     }
00138     if (_btn != NULL) {
00139         delete _btn;
00140         _btn = NULL;
00141     }
00142     return true;
00143 }
00144