added imgui to the app

include/imgui/imgui-SFML.h

@@ -0,0 +1,75 @@
+#include <SFML/System/Vector2.hpp>
+#include <SFML/Graphics/Rect.hpp>
+#include <SFML/Graphics/Color.hpp>
+#include <SFML/System/Time.hpp>
+
+namespace sf
+{
+    class Event;
+    class RenderTarget;
+    class RenderWindow;
+    class Sprite;
+    class Texture;
+    class Window;
+}
+
+namespace ImGui
+{
+namespace SFML
+{
+    void Init(sf::RenderTarget& target, sf::Texture* fontTexture = NULL);
+
+    void ProcessEvent(const sf::Event& event);
+
+    void Update(sf::RenderWindow& window, sf::Time dt);
+    void Update(sf::Window& window, sf::RenderTarget& target, sf::Time dt);
+    void Update(const sf::Vector2i& mousePos, const sf::Vector2f& displaySize, sf::Time dt);
+
+    void Shutdown();
+
+    void createFontTexture(sf::Texture& texture);
+    void setFontTexture(sf::Texture& texture);
+}
+
+// custom ImGui widgets for SFML stuff
+
+// Image overloads
+    void Image(const sf::Texture& texture,
+        const sf::Color& tintColor = sf::Color::White,
+        const sf::Color& borderColor = sf::Color::Transparent);
+    void Image(const sf::Texture& texture, const sf::Vector2f& size,
+        const sf::Color& tintColor = sf::Color::White,
+        const sf::Color& borderColor = sf::Color::Transparent);
+    void Image(const sf::Texture& texture, const sf::FloatRect& textureRect,
+        const sf::Color& tintColor = sf::Color::White,
+        const sf::Color& borderColor = sf::Color::Transparent);
+    void Image(const sf::Texture& texture, const sf::Vector2f& size, const sf::FloatRect& textureRect,
+        const sf::Color& tintColor = sf::Color::White,
+        const sf::Color& borderColor = sf::Color::Transparent);
+
+    void Image(const sf::Sprite& sprite,
+        const sf::Color& tintColor = sf::Color::White,
+        const sf::Color& borderColor = sf::Color::Transparent);
+    void Image(const sf::Sprite& sprite, const sf::Vector2f& size,
+        const sf::Color& tintColor = sf::Color::White,
+        const sf::Color& borderColor = sf::Color::Transparent);
+
+// ImageButton overloads
+    bool ImageButton(const sf::Texture& texture, const int framePadding = -1,
+                     const sf::Color& bgColor = sf::Color::Transparent,
+                     const sf::Color& tintColor = sf::Color::White);
+    bool ImageButton(const sf::Texture& texture, const sf::Vector2f& size, const int framePadding = -1,
+                     const sf::Color& bgColor = sf::Color::Transparent, const sf::Color& tintColor = sf::Color::White);
+
+    bool ImageButton(const sf::Sprite& sprite, const int framePadding = -1,
+                     const sf::Color& bgColor = sf::Color::Transparent,
+                     const sf::Color& tintColor = sf::Color::White);
+    bool ImageButton(const sf::Sprite& sprite, const sf::Vector2f& size, const int framePadding = -1,
+                     const sf::Color& bgColor = sf::Color::Transparent,
+                     const sf::Color& tintColor = sf::Color::White);
+
+// Draw_list overloads. All positions are in relative coordinates (relative to top-left of the current window)
+    void DrawLine(const sf::Vector2f& a, const sf::Vector2f& b, const sf::Color& col, float thickness = 1.0f);
+    void DrawRect(const sf::FloatRect& rect, const sf::Color& color, float rounding = 0.0f, int rounding_corners = 0x0F, float thickness = 1.0f);
+    void DrawRectFilled(const sf::FloatRect& rect, const sf::Color& color, float rounding = 0.0f, int rounding_corners = 0x0F);
+}