From 9590e2cc5288c062db5c8a1f6d912a151a5899e7 Mon Sep 17 00:00:00 2001
From: Dan Paulat <dpaulat@gmail.com>
Date: Thu, 23 Nov 2023 08:22:19 -0600
Subject: [PATCH] Add location icon to overlay layer

---
 scwx-qt/source/scwx/qt/map/overlay_layer.cpp | 72 +++++++++++++++++++-
 1 file changed, 71 insertions(+), 1 deletion(-)

diff --git a/scwx-qt/source/scwx/qt/map/overlay_layer.cpp b/scwx-qt/source/scwx/qt/map/overlay_layer.cpp
index 4656f2bf..3f7377b4 100644
--- a/scwx-qt/source/scwx/qt/map/overlay_layer.cpp
+++ b/scwx-qt/source/scwx/qt/map/overlay_layer.cpp
@@ -1,5 +1,8 @@
 #include <scwx/qt/map/overlay_layer.hpp>
+#include <scwx/qt/gl/draw/geo_icons.hpp>
 #include <scwx/qt/gl/draw/rectangle.hpp>
+#include <scwx/qt/manager/position_manager.hpp>
+#include <scwx/qt/types/texture_types.hpp>
 #include <scwx/util/logger.hpp>
 #include <scwx/util/time.hpp>
 
@@ -10,6 +13,7 @@
 #endif
 
 #include <imgui.h>
+#include <QGeoPositionInfo>
 
 #if !defined(_MSC_VER)
 #   include <date/date.h>
@@ -34,13 +38,24 @@ class OverlayLayerImpl
 public:
    explicit OverlayLayerImpl(std::shared_ptr<MapContext> context) :
        activeBoxOuter_ {std::make_shared<gl::draw::Rectangle>(context)},
-       activeBoxInner_ {std::make_shared<gl::draw::Rectangle>(context)}
+       activeBoxInner_ {std::make_shared<gl::draw::Rectangle>(context)},
+       icons_ {std::make_shared<gl::draw::GeoIcons>(context)},
+       locationIconName_ {
+          types::GetTextureName(types::ImageTexture::Crosshairs32)}
    {
    }
    ~OverlayLayerImpl() = default;
 
+   std::shared_ptr<manager::PositionManager> positionManager_ {
+      manager::PositionManager::Instance()};
+   QGeoPositionInfo currentPosition_ {};
+
    std::shared_ptr<gl::draw::Rectangle> activeBoxOuter_;
    std::shared_ptr<gl::draw::Rectangle> activeBoxInner_;
+   std::shared_ptr<gl::draw::GeoIcons>  icons_;
+
+   const std::string&                         locationIconName_;
+   std::shared_ptr<gl::draw::GeoIconDrawItem> locationIcon_ {};
 
    std::string sweepTimeString_ {};
    bool        sweepTimeNeedsUpdate_ {true};
@@ -52,6 +67,7 @@ OverlayLayer::OverlayLayer(std::shared_ptr<MapContext> context) :
 {
    AddDrawItem(p->activeBoxOuter_);
    AddDrawItem(p->activeBoxInner_);
+   AddDrawItem(p->icons_);
 
    p->activeBoxOuter_->SetPosition(0.0f, 0.0f);
 }
@@ -73,6 +89,42 @@ void OverlayLayer::Initialize()
               this,
               &OverlayLayer::UpdateSweepTimeNextFrame);
    }
+
+   p->currentPosition_ = p->positionManager_->position();
+   auto coordinate     = p->currentPosition_.coordinate();
+
+   p->icons_->StartIconSheets();
+   p->icons_->AddIconSheet(p->locationIconName_);
+   p->icons_->FinishIconSheets();
+
+   p->icons_->StartIcons();
+   p->locationIcon_ = p->icons_->AddIcon();
+   gl::draw::GeoIcons::SetIconTexture(
+      p->locationIcon_, p->locationIconName_, 0);
+   gl::draw::GeoIcons::SetIconLocation(
+      p->locationIcon_, coordinate.latitude(), coordinate.longitude());
+   p->icons_->FinishIcons();
+
+   connect(p->positionManager_.get(),
+           &manager::PositionManager::LocationTrackingChanged,
+           this,
+           [this]() { Q_EMIT NeedsRendering(); });
+   connect(p->positionManager_.get(),
+           &manager::PositionManager::PositionUpdated,
+           this,
+           [this](const QGeoPositionInfo& position)
+           {
+              auto coordinate = position.coordinate();
+              if (position.isValid() &&
+                  p->currentPosition_.coordinate() != coordinate)
+              {
+                 gl::draw::GeoIcons::SetIconLocation(p->locationIcon_,
+                                                     coordinate.latitude(),
+                                                     coordinate.longitude());
+                 Q_EMIT NeedsRendering();
+              }
+              p->currentPosition_ = position;
+           });
 }
 
 void OverlayLayer::Render(
@@ -85,6 +137,9 @@ void OverlayLayer::Render(
 
    context()->set_render_parameters(params);
 
+   // Set OpenGL blend mode for transparency
+   gl.glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+
    p->sweepTimePicked_ = false;
 
    if (p->sweepTimeNeedsUpdate_ && radarProductView != nullptr)
@@ -117,6 +172,10 @@ void OverlayLayer::Render(
       p->activeBoxInner_->SetBorder(1.0f * pixelRatio, {255, 255, 255, 255});
    }
 
+   // Location Icon
+   p->icons_->SetVisible(p->currentPosition_.isValid() &&
+                         p->positionManager_->IsLocationTracked());
+
    DrawLayer::Render(params);
 
    if (radarProductView != nullptr)
@@ -198,6 +257,17 @@ void OverlayLayer::Deinitialize()
                  this,
                  &OverlayLayer::UpdateSweepTimeNextFrame);
    }
+
+   disconnect(p->positionManager_.get(),
+              &manager::PositionManager::LocationTrackingChanged,
+              this,
+              nullptr);
+   disconnect(p->positionManager_.get(),
+              &manager::PositionManager::PositionUpdated,
+              this,
+              nullptr);
+
+   p->locationIcon_ = nullptr;
 }
 
 bool OverlayLayer::RunMousePicking(