1 files changed, 52 insertions, 0 deletions
diff --git a/include/ImagePreview.hpp b/include/ImagePreview.hpp
new file mode 100644
index 0000000..1d20fe8
--- /dev/null
+++ b/include/ImagePreview.hpp
@@ -0,0 +1,52 @@
+#pragma once
+
+#include <SFML/Graphics/RenderWindow.hpp>
+#include <SFML/Graphics/Sprite.hpp>
+#include <SFML/Graphics/Texture.hpp>
+#include <SFML/Window/Event.hpp>
+#include <SFML/System/Clock.hpp>
+#include <string>
+
+namespace dchat
+{
+    class Gif;
+    
+    class ImagePreview
+    {
+    public:
+        // set @texture to nullptr if you wish to end preview
+        static void preview(sf::Texture *texture, const std::string &url = "");
+        // set gif to nullptr if you wish to end preview
+        static void preview(Gif *gif, const std::string &url = "");
+        static void* getPreviewContentPtr();
+        static sf::Int32 getTimeSinceLastSeenMs();
+        
+        static void processEvent(const sf::Event &event);
+        static void draw(sf::RenderWindow &window);
+    private:
+        enum class ContentType
+        {
+            NONE,
+            TEXTURE,
+            GIF
+        };
+        
+        ImagePreview() : texture(nullptr), contentType(ContentType::NONE) {}
+        ImagePreview(const ImagePreview&) = delete;
+        ImagePreview& operator=(const ImagePreview&) = delete;
+        static ImagePreview* getInstance();
+        
+        sf::Vector2u calculateImageSize(sf::Vector2u windowSize) const;
+    private:
+        sf::Sprite sprite;
+        sf::Vector2u size;
+        sf::Clock lastSeenTimer;
+        
+        union
+        {
+            sf::Texture *texture;
+            Gif *gif;
+        };
+        ContentType contentType;
+    };
+}