Fleshing out TextBox

src/common/text_box.cpp

@@ -0,0 +1,70 @@
+/* Copyright: (c) Kayne Ruse 2013-2015
+ * 
+ * This software is provided 'as-is', without any express or implied
+ * warranty. In no event will the authors be held liable for any damages
+ * arising from the use of this software.
+ * 
+ * Permission is granted to anyone to use this software for any purpose,
+ * including commercial applications, and to alter it and redistribute it
+ * freely, subject to the following restrictions:
+ * 
+ * 1. The origin of this software must not be misrepresented; you must not
+ * claim that you wrote the original software. If you use this software
+ * in a product, an acknowledgment in the product documentation would be
+ * appreciated but is not required.
+ * 
+ * 2. Altered source versions must be plainly marked as such, and must not be
+ * misrepresented as being the original software.
+ * 
+ * 3. This notice may not be removed or altered from any source
+ * distribution.
+*/
+#include "text_box.hpp"
+
+#include <stdexcept>
+
+SDL_Texture* renderTextTexture(SDL_Renderer* renderer, TTF_Font* font, std::string str, SDL_Color color) {
+	//make the surface (from SDL_ttf)
+	SDL_Surface* surface = TTF_RenderText_Solid(font, str.c_str(), color);
+	if (!surface) {
+		throw(std::runtime_error("Failed to create a TTF surface"));
+	}
+
+	//convert to texture
+	SDL_Texture* texture = SDL_CreateTextureFromSurface(renderer, surface);
+
+	//cleanup
+	SDL_FreeSurface(surface);
+
+	//check
+	if (!texture) {
+		throw(std::runtime_error("Failed to create a TTF texture"));
+	}
+
+	//NOTE: free the texture yourself
+	return texture;
+}
+
+void TextBox::DrawTo(SDL_Renderer* renderer) {
+	image.DrawTo(renderer, posX, posY);
+}
+
+void TextBox::SetText(SDL_Renderer* renderer, TTF_Font* font, std::string str, SDL_Color color) {
+	//make the new texture
+	SDL_Texture* newText = renderTextTexture(renderer, font, str, color);
+
+	//copy the texture
+	image.Free();
+	image.CopyTexture(renderer, newText);
+
+	//cleanup
+	SDL_DestroyTexture(newText);
+}
+
+void TextBox::AddText(SDL_Renderer* renderer, TTF_Font* font, std::string str, SDL_Color color) {
+	//TODO: empty
+}
+
+void TextBox::ClearText() {
+	image.Free();
+}