SolarScreen.h

00001 #ifndef SOLARSCREEN_H
00002 #define SOLARSCREEN_H
00003 
00004 #include "ListController.h"
00005 
00006 class SolarScreen: public Button <SolarScreen>
00007 {
00008 
00009 public:
00010     SolarScreen(uint16_t backgroundColor);
00011     int start();
00012     void buttonPressed(int button);
00013 
00014 private:
00015     
00016     void drawSolarScreen();
00017     void drawTile();
00018     void updateTile();
00019     //void deAllocateMemory();
00020     void drawWattage(float wattage, uint16_t color);
00021     
00022     int changeScreen;
00023     float previousWattage;
00024     
00025     ListController *list;   // manages the list
00026     bool scroll;    // updated when a scroll event occurs
00027     bool enter;     // updated when an enter event occurs
00028     uint16_t bgColor;   // background color
00029     
00030     
00031     
00032 };
00033 
00034 
00035 SolarScreen::SolarScreen(uint16_t backgroundColor)
00036 {
00037     
00038     bgColor = backgroundColor;
00039 }
00040 
00041 int SolarScreen::start(){
00042     
00043     previousWattage = -1;
00044     
00045     // attach interrupts to buttons
00046     Button<SolarScreen>::activateButtons(this);
00047     
00048     // draw the screen
00049     drawSolarScreen();
00050     
00051     
00052     changeScreen = 0;
00053     scroll = false;
00054     enter = false;
00055 
00056     
00057     
00058     while (changeScreen == 0){
00059         updateTile();
00060         
00061         // scroll event occured
00062         if (scroll) {
00063             // perform scroll on the list
00064             list->scroll();
00065             // reset variable
00066             scroll = false;
00067         }
00068 
00069         // enter event occured
00070         if (enter) {
00071             // read the current option on the list
00072             changeScreen = list->getCurrentOption();
00073         }
00074         //wait_ms(500);
00075         Thread::wait(200);    
00076     }
00077     
00078     // relese memory occupied by list controller
00079     delete list;
00080     
00081     // dettach interrupts to buttons
00082     Button<SolarScreen>::deActivateButtons();
00083     
00084     return changeScreen;
00085 }
00086 
00087 
00088 void SolarScreen::drawSolarScreen(){
00089     
00090     // draw the tile
00091     drawTile();
00092     
00093     // construct the list
00094     list = new ListController( 0,
00095                      63,
00096                    "Solar",
00097                 "Values",
00098                 "Graph",
00099                 "",
00100                 "",
00101                 backgroundColor,
00102                 2);
00103     
00104     // draw the list 
00105     list->drawList(); 
00106 }
00107 
00108 void SolarScreen::drawTile()
00109 {   
00110     // draw the green background
00111     tft.fillRect(0,0,tft.width(),63,ST7735_GREEN);
00112     
00113     // draw the text
00114     tft.setTextSize(1);
00115     tft.setCursor(5,5);
00116     tft.setTextColor(ST7735_RED);
00117     tft.printf("Power:");
00118     
00119     // update the power values
00120     updateTile();
00121 }
00122 
00123 void SolarScreen::updateTile()
00124 {
00125     // read the current power
00126     float wattage = getSolarPower();
00127     
00128     // temporary storage
00129     char wattageString[5];
00130     
00131     // tracks previously measured power
00132     // ensure first value is ridiculous 
00133     // to enable print on startup
00134     //static float previousWattage = -1;
00135     
00136     //  convert float to char*
00137     //  to round off to 1 decimal place
00138     sprintf(wattageString,"%.1f",wattage);    
00139     
00140     // convert back to float
00141     wattage = atof(wattageString);
00142     
00143     // multiply by 10
00144     wattage = wattage*10;
00145     
00146     // convert float to integer
00147     float currentWattage = wattage;
00148     
00149     if(currentWattage != previousWattage){
00150         
00151         // first delete the previous wattage
00152         drawWattage(previousWattage,ST7735_GREEN);
00153         // then write the new wattage
00154         drawWattage(currentWattage,ST7735_BLUE);
00155         
00156     
00157     }else{
00158         // do nothing    
00159     }
00160     
00161     // update the previous wattage
00162     previousWattage = currentWattage;
00163 }
00164 
00165 void SolarScreen::drawWattage(float wattage, uint16_t color)
00166 {
00167     // convert float to integer
00168     int wattageInt = wattage;
00169     
00170     // divide by 10
00171     int firstInt = wattageInt/10;
00172     
00173     // print the quotient as the first value
00174     int secondInt = wattageInt%10;
00175     
00176     // the coordinates of the first large digit
00177     int startWidth = 40;
00178     int startHeight = 15;
00179     
00180     // The first Large Digit
00181     tft.setTextSize(6);
00182     tft.setCursor(startWidth, startHeight);
00183     tft.setTextColor(color);
00184     tft.printf("%d",firstInt);
00185     
00186     // the decimal point
00187     tft.setCursor(startWidth+ 28, startHeight + 21);
00188     tft.setTextSize(3);
00189     tft.printf(".");
00190     
00191     // The second Large Digit
00192     tft.setCursor(startWidth + 45, startHeight);
00193     tft.setTextSize(6);
00194     tft.printf("%d", secondInt);
00195     
00196     // The power units
00197     tft.setCursor(startWidth + 80, startHeight + 15);
00198     tft.setTextSize(3);
00199     tft.printf("W");
00200     
00201     // reset the text size to smallest  
00202     tft.setTextSize(1);  
00203 }
00204 
00205 void SolarScreen::buttonPressed(int button)
00206 {
00207     switch(button){
00208         
00209         case BACKBUTTON:
00210             // navigate to the previous screen
00211             changeScreen = -1;
00212             break;
00213         
00214         case SCROLLBUTTON:
00215             // scroll to the next option
00216             scroll = true;
00217             break;
00218         
00219         case ENTERBUTTON:
00220             // navigate to the selected option
00221             enter = true;
00222             
00223         default:
00224             // do nothing
00225             break;    
00226     }
00227 }
00228 
00229 #endif