File content as of revision 5:f4de114c31c3:

/*
 *  Copyright 2014 Embedded Artists AB
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */


#include "mbed.h"
#include "AppLauncher.h"
#include "lpc_swim_font.h"
#include "Button.h"
#include "ImageButton.h"

/******************************************************************************
 * Defines and typedefs
 *****************************************************************************/
 
#define APP_PREFIX  "[Launcher] "

#define NO_APPLICATION  (-1)


//typedef enum {
//    NoApplication = -1,
//    SettingsApp   =  0,
//    ColorPicker,
//    TouchTestApp,
//    ImageViewerApp,
//    SlideshowApp,
//    //TouchGFXApp,
//    //EmWinApp,
//    Placeholder    =  99,
//    CalibrationApp = 100,
//} AppID_t;

/******************************************************************************
 * Private variables
 *****************************************************************************/

static int appToLaunch = NO_APPLICATION;

/******************************************************************************
 * Private functions
 *****************************************************************************/

static void buttonClicked(uint32_t x)
{
    if (appToLaunch == NO_APPLICATION) {
        appToLaunch = (int)x;
    }
}

void AppLauncher::draw()
{
    // Prepare fullscreen
    swim_window_open(_win, 
                     _disp->width(), _disp->height(),         // full size
                     (COLOR_T*)_fb,
                     0,0,_disp->width()-1, _disp->height()-1, // window position and size
                     1,                                     // border
                     WHITE, BLACK, BLACK);                    // colors: pen, backgr, forgr
    swim_set_title(_win, "Demo Program", BLACK);

    const char* msg = "(Press physical UserButton >2s to calibrate touch)";
    int w, h;
    swim_get_string_bounds(_win, msg, &w, &h);
    swim_put_text_xy(_win, msg, (_disp->width()-w)/2, _disp->height()-h*4);
    
    for (int i = 0; i < _usedButtons; i++) {
        _buttons[i]->draw();
    }
}

/******************************************************************************
 * Public functions
 *****************************************************************************/

AppLauncher::AppLauncher() : _disp(NULL), _win(NULL), _fb(NULL), _usedButtons(0)
{
    for (int i = 0; i < NumberOfButtons; i++) {
        _buttons[i] = NULL;
    }
}

AppLauncher::~AppLauncher()
{
    teardown();
}

bool AppLauncher::setup()
{
    RtosLog* log = DMBoard::instance().logger();

    _disp = DMBoard::instance().display();
    _win = (SWIM_WINDOW_T*)malloc(sizeof(SWIM_WINDOW_T));
    _fb = _disp->allocateFramebuffer();
    
    if (_win == NULL || _fb == NULL) {
        log->printf(APP_PREFIX"Failed to allocate memory for framebuffer\r\n");
        return false;
    }
    
    return true;
}

void AppLauncher::runToCompletion()
{
    DMBoard* board = &DMBoard::instance();
    RtosLog* log = board->logger();

    // Draw something on the framebuffer before using it so that it doesn't look garbled
    draw();
    
    // Start display in default mode (16-bit)
    Display::DisplayError disperr = _disp->powerUp(_fb);
    if (disperr != Display::DisplayError_Ok) {
        log->printf(APP_PREFIX"Failed to initialize the display, got error %d\r\n", disperr);
        return;
    }

    // To keep track of the button pushes
    Timer buttonTimer;
    bool buttonPressed = false;
    
    // Wait for touches
    TouchPanel* touch = board->touchPanel();
    TouchPanel::touchCoordinate_t coord;
    while(touch->read(coord) == TouchPanel::TouchError_Ok) {
        
        // Process the touch coordinate for each button
        for (int i = 0; i < NumberOfButtons; i++) {
            if (_buttons[i] != NULL) {
                if (_buttons[i]->handle(coord.x, coord.y, coord.z > 0)) {
                    _buttons[i]->draw();
                }
            }
        }
        
        // Check if the physical USER button on the board has been pressed
        if (appToLaunch == NO_APPLICATION) {
            if (board->buttonPressed()) {
                if (buttonPressed) {
                    if (buttonTimer.read_ms() > 2000) {
                        // User has pressed the button more than two seconds.
                        // Start calibration application
                        appToLaunch = CalibrationApp;
                        buttonTimer.stop();
                        buttonPressed = false;
                    }
                } else {
                    buttonTimer.reset();
                    buttonTimer.start();
                    buttonPressed = true;
                }
            } else if (buttonPressed) {
                buttonTimer.stop();
                buttonPressed = false;
            }
        } else {
            // pressing the display buttons take precedence so disregard the
            // USER button
            buttonTimer.stop();
            buttonPressed = false;
        }
        
        if (appToLaunch != NO_APPLICATION) {
            App* a = NULL;
            if (_callback != NULL) {
                a = _callback(appToLaunch);
            }
            if (a != NULL) {
                if (a->setup()) {
                    a->runToCompletion();
                    a->teardown();
                }
                delete a;
            }
            appToLaunch = NO_APPLICATION;
        }
    }
}

bool AppLauncher::teardown()
{
    if (_win != NULL) {
        free(_win);
        _win = NULL;
    }
    if (_fb != NULL) {
        free(_fb);
        _fb = NULL;
    }
    for (int i = 0; i < NumberOfButtons; i++) {
        _buttons[i] = NULL;
        if (_buttons[i] != NULL) {
            delete _buttons[i];
            _buttons[i] = NULL;
        }
    }
    return true;
}

void AppLauncher::setAppCreatorFunc(App*(*callback)(uint32_t buttonID))
{
    _callback = callback;
}

bool AppLauncher::addButton(uint32_t buttonID, const char* caption)
{
    int idx = _usedButtons++;
    int xspace = ((_disp->width() - ButtonColumns * ButtonWidth) / (ButtonColumns + 1));
    int yspace = ((_disp->height() - TitleHeight - ButtonRows * ButtonHeight) / (ButtonRows + 1));
    
    _buttons[idx] = new Button(caption, (COLOR_T*)_fb, 
                              xspace + (ButtonWidth + xspace)*(idx%ButtonColumns), 
                              TitleHeight + yspace + (ButtonHeight + yspace)*(idx/ButtonColumns), 
                              ButtonWidth, ButtonHeight);
    _buttons[idx]->setAction(buttonClicked, buttonID);
    //_buttons[idx]->draw();
    return true;
}

bool AppLauncher::addImageButton(uint32_t buttonID, const char* imgUp, const char* imgDown)
{
    int idx = _usedButtons++;
    int xspace = ((_disp->width() - ButtonColumns * 64) / (ButtonColumns + 1));
    int yspace = ((_disp->height() - TitleHeight - ButtonRows * 64) / (ButtonRows + 1));
    
    ImageButton* img =  new ImageButton((COLOR_T*)_fb, 
                              xspace + (64 + xspace)*(idx%ButtonColumns), 
                              TitleHeight + yspace + (64 + yspace)*(idx/ButtonColumns), 
                              64, 64);
    if (img->loadImages(imgUp, imgDown)) {
      _buttons[idx] = img;
      _buttons[idx]->setAction(buttonClicked, buttonID);
      //_buttons[idx]->draw();
      return true;
    } else {
      //DMBoard::instance().logger()->printf("Failed to load image for buttonID %u, %s[%s]\n", buttonID, imgUp, imgDown==NULL?"":imgDown);
      return false;
    }
}

bool AppLauncher::addImageButton(uint32_t buttonID, const unsigned char* imgUp, unsigned int imgUpSize, const unsigned char* imgDown, unsigned int imgDownSize)
{
    int idx = _usedButtons++;
    int xspace = ((_disp->width() - ButtonColumns * 64) / (ButtonColumns + 1));
    int yspace = ((_disp->height() - TitleHeight - ButtonRows * 64) / (ButtonRows + 1));
    
    ImageButton* img =  new ImageButton((COLOR_T*)_fb, 
                              xspace + (64 + xspace)*(idx%ButtonColumns), 
                              TitleHeight + yspace + (64 + yspace)*(idx/ButtonColumns), 
                              64, 64);
    if (img->loadImages(imgUp, imgUpSize, imgDown, imgDownSize)) {
      _buttons[idx] = img;
      _buttons[idx]->setAction(buttonClicked, buttonID);
      //_buttons[idx]->draw();
      return true;
    } else {
      //DMBoard::instance().logger()->printf("Failed to load image for buttonID %u, %s[%s]\n", buttonID, imgUp, imgDown==NULL?"":imgDown);
      return false;
    }
}