src/MapWindow/MapWindowTask.cpp

   1 /*
   2 Copyright_License {
   3
   4   XCSoar Glide Computer - http://www.xcsoar.org/
   5   Copyright (C) 2000-2013 The XCSoar Project
   6   A detailed list of copyright holders can be found in the file "AUTHORS".
   7
   8   This program is free software; you can redistribute it and/or
   9   modify it under the terms of the GNU General Public License
  10   as published by the Free Software Foundation; either version 2
  11   of the License, or (at your option) any later version.
  12
  13   This program is distributed in the hope that it will be useful,
  14   but WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16   GNU General Public License for more details.
  17
  18   You should have received a copy of the GNU General Public License
  19   along with this program; if not, write to the Free Software
  20   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  21 }
  22 */
  23
  24 #include "MapWindow.hpp"
  25 #include "Screen/Icon.hpp"
  26 #include "Look/Fonts.hpp"
  27 #include "Geo/Math.hpp"
  28 #include "Task/ProtectedTaskManager.hpp"
  29 #include "Engine/Task/Ordered/OrderedTask.hpp"
  30 #include "Renderer/TaskRenderer.hpp"
  31 #include "Renderer/TaskPointRenderer.hpp"
  32 #include "Renderer/OZRenderer.hpp"
  33 #include "Screen/Layout.hpp"
  34 #include "Math/Screen.hpp"
  35 #include "Look/MapLook.hpp"
  36
  37 #include <stdio.h>
  38 #include <math.h>
  39
  40 void
  41 MapWindow::DrawTask(Canvas &canvas)
  42 {
  43   if (task == NULL)
  44     return;
  45
  46   /* RLD bearing is invalid if GPS not connected and in non-sim mode,
  47    but we can still draw targets */
  48   bool draw_bearing = Basic().track_available;
  49   bool draw_route = draw_bearing;
  50
  51   if (draw_bearing) {
  52     if (Calculated().planned_route.size()>2) {
  53       draw_bearing = false;
  54     } else {
  55       draw_route = false;
  56     }
  57   }
  58
  59   ProtectedTaskManager::Lease task_manager(*task);
  60   const AbstractTask *task = task_manager->GetActiveTask();
  61   if (task && task->CheckTask()) {
  62     TaskPointRenderer::TargetVisibility target_visibility =
  63         IsNearSelf() ? TaskPointRenderer::ACTIVE : TaskPointRenderer::ALL;
  64
  65     OZRenderer ozv(look.task, airspace_renderer.GetLook(),
  66                    GetMapSettings().airspace);
  67     TaskPointRenderer tpv(canvas, render_projection, look.task,
  68                           /* we're accessing the OrderedTask here,
  69                              which may be invalid at this point, but it
  70                              will be used only if active, so it's ok */
  71                           task_manager->GetOrderedTask().GetTaskProjection(),
  72                           ozv, draw_bearing, target_visibility,
  73                           Basic().location_available, Basic().location);
  74     TaskRenderer dv(tpv, render_projection.GetScreenBounds());
  75     dv.Draw(*task);
  76   }
  77
  78   if (draw_route)
  79     DrawRoute(canvas);
  80 }
  81
  82 void
  83 MapWindow::DrawRoute(Canvas &canvas)
  84 {
  85   const auto &route = Calculated().planned_route;
  86
  87   const auto r_size = route.size();
  88   RasterPoint p[r_size], *pp = &p[0];
  89   for (auto i = route.begin(), end = route.end(); i != end; ++i, ++pp)
  90     *pp = render_projection.GeoToScreen(*i);
  91
  92   ScreenClosestPoint(p[r_size-1], p[r_size-2], p[r_size-1], &p[r_size-1], Layout::Scale(20));
  93
  94   canvas.Select(look.task.bearing_pen);
  95   canvas.DrawPolyline(p, r_size);
  96 }
  97
  98 void
  99 MapWindow::DrawTaskOffTrackIndicator(Canvas &canvas)
 100 {
 101   if (Calculated().circling
 102       || !Basic().location_available
 103       || !Basic().track_available
 104       || !GetMapSettings().detour_cost_markers_enabled)
 105     return;
 106
 107   const TaskStats &task_stats = Calculated().task_stats;
 108   const ElementStat &current_leg = task_stats.current_leg;
 109
 110   if (!task_stats.task_valid || !current_leg.location_remaining.IsValid())
 111     return;
 112
 113   const GeoPoint target = current_leg.location_remaining;
 114   GeoVector vec(Basic().location, target);
 115
 116   if ((Basic().track - vec.bearing).AsDelta().AbsoluteDegrees() < fixed(10))
 117     // insignificant error
 118     return;
 119
 120   fixed distance_max =
 121     std::min(vec.distance,
 122              render_projection.GetScreenDistanceMeters() * fixed(0.7));
 123
 124   // too short to bother
 125   if (distance_max < fixed(5000))
 126     return;
 127
 128   GeoPoint start = Basic().location;
 129
 130   canvas.Select(Fonts::map_bold);
 131   canvas.SetTextColor(COLOR_BLACK);
 132   canvas.SetBackgroundTransparent();
 133
 134   GeoPoint dloc;
 135   int ilast = 0;
 136   for (fixed d = fixed(1) / 4; d <= fixed(1); d += fixed(1) / 4) {
 137     dloc = FindLatitudeLongitude(start, Basic().track, distance_max * d);
 138
 139     fixed distance0 = start.Distance(dloc);
 140     fixed distance1 = target.Distance(dloc);
 141     fixed distance = fixed(distance0 + distance1) / vec.distance;
 142     int idist = iround((distance - fixed(1)) * 100);
 143
 144     if ((idist != ilast) && (idist > 0) && (idist < 1000)) {
 145       TCHAR Buffer[5];
 146       _stprintf(Buffer, _T("%d"), idist);
 147       RasterPoint sc = render_projection.GeoToScreen(dloc);
 148       PixelSize tsize = canvas.CalcTextSize(Buffer);
 149       canvas.DrawText(sc.x - tsize.cx / 2, sc.y - tsize.cy / 2, Buffer);
 150       ilast = idist;
 151     }
 152   }
 153 }