lib/gui/egauge.cpp

   1 #include <lib/gui/egauge.h>
   2
   3 #include <stdlib.h>
   4
   5 #include <lib/base/erect.h>
   6 #include <lib/gdi/fb.h>
   7 #include <lib/gdi/lcd.h>
   8 #include <lib/gui/eskin.h>
   9 #include <lib/system/init.h>
  10 #include <lib/system/init_num.h>
  11 #include <lib/system/math.h>
  12
  13 /*
  14  * eGauge skin widget. Uses same syntax as eProgress
  15  *   - start parameter indicates start and end offset in degrees for the marker.
  16  *   - The 'start' parameter can be set in skin file
  17  *   - The 'pixmap' parameter can be used to specify a background pixmap
  18  *   - The 'sliderpixmap' parameter can be used to specify a png file as marker instead of the line.
  19  *     It is drawn just against the border.
  20  *     Note: The pixmap itself will not be rotated. So it is best to use a circular picture.
  21  *   - the egauge background is set to transparent
  22  */
  23
  24 eGauge::eGauge(eWidget *parent, int takefocus)
  25         : eProgress(parent, takefocus)
  26 {
  27 }
  28
  29 eGauge::~eGauge()
  30 {
  31 }
  32
  33 void eGauge::redrawWidget(gPainter *target, const eRect &area)
  34 {
  35         if (pixmap)
  36         {
  37                 target->blit(*pixmap, ePoint(0, 0), area, gPixmap::blitAlphaTest);
  38         }
  39
  40         if (border)
  41         {
  42                 /* draw border */
  43                 target->setForegroundColor(getForegroundColor());
  44                 target->fill(eRect(0, 0, size.width(), border));
  45                 target->fill(eRect(0, border, border, size.height()-border));
  46                 target->fill(eRect(border, size.height()-border, size.width()-border, border));
  47                 target->fill(eRect(size.width()-border, border, border, size.height()-border));
  48         }
  49
  50         int endx, endy;
  51         int basex = size.width() >> 1;
  52         int basey = size.height() >> 1;
  53
  54         //target->setForegroundColor(right);
  55         //target->fill(eRect(border, border, size.width()-border*2, size.height()-border*2));
  56         // angle in degrees
  57         double angle = (double) start + (double) perc * (double)(360 - (start<<1)) / 100.0;
  58         double rads  = Radians(angle);
  59
  60         if (!sliderPixmap)
  61         {
  62                 if (direction)
  63                 {
  64                         endx = basex + (int) (SIN(rads) * (double)(size.width()  - (border<<1))/2.0);
  65                         endy = basey - (int) (COS(rads) * (double)(size.height() - (border<<1))/2.0);
  66                 }
  67                 else
  68                 {
  69                         endx = basex - (int) (SIN(rads) * (double)(size.width()  - (border<<1))/2.0);
  70                         endy = basey + (int) (COS(rads) * (double)(size.height() - (border<<1))/2.0);
  71                 }
  72                 target->setForegroundColor(left);
  73                 target->line(ePoint(basex, basey), ePoint(endx, endy));
  74         }
  75         else
  76         {
  77                 if (direction)
  78                 {
  79                         endx = basex + (int) (SIN(rads) * (double)(size.width()  - (border<<1) - sliderPixmap->x) / 2.0) - (sliderPixmap->x >> 1);
  80                         endy = basey - (int) (COS(rads) * (double)(size.height() - (border<<1) - sliderPixmap->y) / 2.0) - (sliderPixmap->y >> 1);
  81                 }
  82                 else
  83                 {
  84                         endx = basex - (int) (SIN(rads) * (double)(size.width()  - (border<<1) - sliderPixmap->x) / 2.0) - (sliderPixmap->x >> 1);
  85                         endy = basey + (int) (COS(rads) * (double)(size.height() - (border<<1) - sliderPixmap->y) / 2.0) - (sliderPixmap->y >> 1);
  86                 }
  87                 //eDebug("sliderPixmap %d,%d at %d,%d  size=%d,%d border=%d offset=%d", basex, basey, endx, endy, sliderPixmap->x, sliderPixmap->y, border, pixmapoffset );
  88                 target->blit(*sliderPixmap, ePoint(endx, endy), area, gPixmap::blitAlphaTest);
  89         }
  90 }
  91
  92 static eWidget *create_eGauge(eWidget *parent)
  93 {
  94         return new eGauge(parent);
  95 }
  96
  97 class eGaugeSkinInit
  98 {
  99 public:
 100         eGaugeSkinInit()
 101         {
 102                 eSkin::addWidgetCreator("eGauge", create_eGauge);
 103         }
 104         ~eGaugeSkinInit()
 105         {
 106                 eSkin::removeWidgetCreator("eGauge", create_eGauge);
 107         }
 108 };
 109
 110 eAutoInitP0<eGaugeSkinInit> init_eGaugeSkinInit(eAutoInitNumbers::guiobject, "eGauge");