From f6c85b65f4fe6ad784c9a37f909c7e8109193515 Mon Sep 17 00:00:00 2001
From: rachytski <siarhei.rachytski@gmail.com>
Date: Thu, 24 Jan 2013 18:52:10 +0300
Subject: [PATCH] added gui::ImageView element.

---
 gui/gui.pro        |  2 ++
 gui/image_view.cpp | 87 ++++++++++++++++++++++++++++++++++++++++++++++
 gui/image_view.hpp | 45 ++++++++++++++++++++++++
 3 files changed, 134 insertions(+)
 create mode 100644 gui/image_view.cpp
 create mode 100644 gui/image_view.hpp

diff --git a/gui/gui.pro b/gui/gui.pro
index 19d0ba2661..092abd6b2e 100644
--- a/gui/gui.pro
+++ b/gui/gui.pro
@@ -14,9 +14,11 @@ HEADERS += \
     element.hpp \
     button.hpp \
     text_view.hpp \
+    image_view.hpp \
 
 SOURCES += \
     controller.cpp \
     element.cpp \
     button.cpp \
     text_view.cpp \
+    image_view.cpp \
diff --git a/gui/image_view.cpp b/gui/image_view.cpp
new file mode 100644
index 0000000000..4fc1ade780
--- /dev/null
+++ b/gui/image_view.cpp
@@ -0,0 +1,87 @@
+#include "image_view.hpp"
+#include "controller.hpp"
+
+#include "../graphics/screen.hpp"
+#include "../graphics/display_list.hpp"
+
+#include "../base/matrix.hpp"
+
+#include "../geometry/transformations.hpp"
+
+namespace gui
+{
+  ImageView::Params::Params()
+  {}
+
+  ImageView::ImageView(Params const & p)
+    : base_t(p),
+      m_boundRects(1)
+  {
+    m_image = p.m_image;
+  }
+
+  void ImageView::cache()
+  {
+    graphics::Screen * cs = m_controller->GetCacheScreen();
+
+    m_displayList.reset();
+    m_displayList.reset(cs->createDisplayList());
+
+    cs->beginFrame();
+    cs->setDisplayList(m_displayList.get());
+
+    math::Matrix<double, 3, 3> m =
+        math::Shift(
+          math::Identity<double, 3>(),
+          -(int)m_image.m_size.x / 2, -(int)m_image.m_size.y / 2);
+
+    uint32_t imageResID = cs->mapInfo(m_image);
+    cs->drawImage(m, imageResID, depth());
+
+    cs->setDisplayList(0);
+    cs->endFrame();
+  }
+
+  void ImageView::purge()
+  {
+    m_displayList.reset();
+  }
+
+  vector<m2::AnyRectD> const & ImageView::boundRects() const
+  {
+    if (isDirtyRect())
+    {
+      m2::PointD sz(m_image.m_size);
+
+      m2::PointD pt = computeTopLeft(sz,
+                                     pivot(),
+                                     position());
+
+
+      m_boundRects[0] = m2::AnyRectD(m2::RectD(pt, pt + sz));
+
+      setIsDirtyRect(false);
+    }
+
+    return m_boundRects;
+  }
+
+  void ImageView::draw(graphics::OverlayRenderer * r,
+                       math::Matrix<double, 3, 3> const & m) const
+  {
+    if (isVisible())
+    {
+      checkDirtyLayout();
+
+      m2::PointD pt = computeTopLeft(m_image.m_size,
+                                     pivot() * m,
+                                     position());
+
+      math::Matrix<double, 3, 3> drawM = math::Shift(math::Identity<double, 3>(),
+                                                     pt.x + m_image.m_size.x / 2,
+                                                     pt.y + m_image.m_size.y / 2);
+
+      r->drawDisplayList(m_displayList.get(), drawM * m);
+    }
+  }
+}
diff --git a/gui/image_view.hpp b/gui/image_view.hpp
new file mode 100644
index 0000000000..d2542831e9
--- /dev/null
+++ b/gui/image_view.hpp
@@ -0,0 +1,45 @@
+#pragma once
+
+#include "element.hpp"
+
+#include "../graphics/image.hpp"
+#include "../std/shared_ptr.hpp"
+
+namespace graphics
+{
+  class DisplayList;
+  class OverlayRenderer;
+}
+
+namespace gui
+{
+  class ImageView : public Element
+  {
+  private:
+
+    mutable vector<m2::AnyRectD> m_boundRects;
+
+    graphics::Image::Info m_image;
+    m2::RectU m_margin;
+    shared_ptr<graphics::DisplayList> m_displayList;
+
+  public:
+
+    void cache();
+    void purge();
+
+    typedef Element base_t;
+
+    struct Params : public base_t::Params
+    {
+      graphics::Image::Info m_image;
+      Params();
+    };
+
+    ImageView(Params const & p);
+
+    vector<m2::AnyRectD> const & boundRects() const;
+
+    void draw(graphics::OverlayRenderer * r, math::Matrix<double, 3, 3> const & m) const;
+  };
+}