OutputScreen.h

00001 #ifndef OUTPUTSCREEN_H
00002 #define OUTPUTSCREEN_H
00003 
00004 #include "ListController.h"
00005 
00006 class OutputScreen:public Button <OutputScreen>
00007 {
00008 public:
00009     OutputScreen(uint16_t backgroundColor);
00010     int start();
00011     void buttonPressed(int button);
00012 
00013 private:
00014     void drawOutputScreen();
00015     void drawTile();
00016     void updateTile();
00017     void drawWattage(float wattage, uint16_t color);
00018 
00019     int changeScreen;
00020     float previousWattage;
00021     ListController *list;   // manages the list
00022     bool scroll;    // updated when a scroll event occurs
00023     bool enter;     // updated when an enter event occurs
00024     uint16_t bgColor;   // background color
00025 
00026 };
00027 
00028 OutputScreen::OutputScreen(uint16_t backgroundColor)
00029 {
00030 
00031     bgColor = backgroundColor;
00032 }
00033 
00034 int OutputScreen::start()
00035 {
00036     previousWattage = -1;
00037 
00038     // draw the screen
00039     drawOutputScreen();
00040 
00041     // attach interrupts to buttons
00042     Button<OutputScreen>::activateButtons(this);
00043 
00044     changeScreen = 0;
00045     scroll = false;
00046     enter = false;
00047 
00048 
00049     while (changeScreen == 0) {
00050         updateTile();
00051 
00052         // scroll event occured
00053         if (scroll) {
00054             // perform scroll on the list
00055             list->scroll();
00056             // reset variable
00057             scroll = false;
00058         }
00059 
00060         // enter event occured
00061         if (enter) {
00062             // read the current option on the list
00063             changeScreen = list->getCurrentOption();
00064         }
00065         //wait_ms(500);
00066         Thread::wait(200);
00067     }
00068 
00069     // release the memory held by the list
00070     delete list;
00071 
00072     // dettach interrupts to buttons
00073     Button<OutputScreen>::deActivateButtons();
00074 
00075     return changeScreen;
00076 }
00077 
00078 
00079 void OutputScreen::drawOutputScreen()
00080 {
00081 
00082     // draw the tile
00083     drawTile();
00084 
00085     // construct the list
00086     list = new ListController( 0,
00087                                63,
00088                                "Output",
00089                                "Raspberry Pi",
00090                                "Utility Port",
00091                                "",
00092                                "",
00093                                backgroundColor,
00094                                2);
00095 
00096 
00097     // draw the list
00098     list->drawList();
00099     //Button<BatteriesScreen>::activateButtons();
00100 }
00101 
00102 
00103 
00104 void OutputScreen::drawTile()
00105 {   
00106     // draw the green background
00107     tft.fillRect(0,0,tft.width(),63,ST7735_YELLOW);
00108     
00109     // draw the text
00110     tft.setTextSize(1);
00111     tft.setCursor(5,5);
00112     tft.setTextColor(ST7735_BLUE);
00113     tft.printf("Power:");
00114     
00115     // update the power values
00116     updateTile();
00117 }
00118 
00119 void OutputScreen::updateTile()
00120 {
00121     // read the current power
00122     float wattage = getConsumptionPower();
00123     
00124     // temporary storage
00125     char wattageString[5];
00126     
00127     // tracks previously measured power
00128     // ensure first value is ridiculous 
00129     // to enable print on startup
00130     //static float previousWattage = -1;
00131     
00132     //  convert float to char*
00133     //  to round off to 1 decimal place
00134     sprintf(wattageString,"%.1f",wattage);    
00135     
00136     // convert back to float
00137     wattage = atof(wattageString);
00138     
00139     // multiply by 10
00140     wattage = wattage*10;
00141     
00142     // convert float to integer
00143     float currentWattage = wattage;
00144     
00145     if(currentWattage != previousWattage){
00146         
00147         // first delete the previous wattage
00148         drawWattage(previousWattage,ST7735_YELLOW);
00149         // then write the new wattage
00150         drawWattage(currentWattage,ST7735_RED);
00151         
00152     
00153     }else{
00154         // do nothing    
00155     }
00156     
00157     // update the previous wattage
00158     previousWattage = currentWattage;
00159 }
00160 
00161 void OutputScreen::drawWattage(float wattage, uint16_t color)
00162 {
00163     // convert float to integer
00164     int wattageInt = wattage;
00165     
00166     // divide by 10
00167     int firstInt = wattageInt/10;
00168     
00169     // print the quotient as the first value
00170     int secondInt = wattageInt%10;
00171     
00172     // the coordinates of the first large digit
00173     int startWidth = 40;
00174     int startHeight = 15;
00175     
00176     // The first Large Digit
00177     tft.setTextSize(6);
00178     tft.setCursor(startWidth, startHeight);
00179     tft.setTextColor(color);
00180     tft.printf("%d",firstInt);
00181     
00182     // the decimal point
00183     tft.setCursor(startWidth+ 28, startHeight + 21);
00184     tft.setTextSize(3);
00185     tft.printf(".");
00186     
00187     // The second Large Digit
00188     tft.setCursor(startWidth + 45, startHeight);
00189     tft.setTextSize(6);
00190     tft.printf("%d", secondInt);
00191     
00192     // The power units
00193     tft.setCursor(startWidth + 80, startHeight + 15);
00194     tft.setTextSize(3);
00195     tft.printf("W");
00196     
00197     // reset the text size to smallest  
00198     tft.setTextSize(1);  
00199 }
00200 
00201 void OutputScreen::buttonPressed(int button)
00202 {
00203     switch(button) {
00204 
00205         case BACKBUTTON:
00206             // navigate to the previous screen
00207             changeScreen = -1;
00208             break;
00209 
00210         case SCROLLBUTTON:
00211             // scroll to the next option
00212             scroll = true;
00213             break;
00214 
00215         case ENTERBUTTON:
00216             // navigate to the selected option
00217             //changeScreen = ListController::getCurrentOption();
00218             enter = true;
00219             break;
00220 
00221         default:
00222             // do nothing
00223             break;
00224     }
00225 }
00226 
00227 #endif