Made a new TextBox class

src/common/text_box.cpp

@@ -45,6 +45,10 @@ SDL_Texture* renderTextTexture(SDL_Renderer* renderer, TTF_Font* font, std::stri
 	return texture;
 }
 
+//-------------------------
+//TextLine
+//-------------------------
+
 TextLine::TextLine() {
 	//
 }
@@ -68,3 +72,39 @@ void TextLine::SetText(SDL_Renderer* renderer, TTF_Font* font, std::string str,
 void TextLine::ClearText() {
 	SDL_DestroyTexture(texture);
 }
+
+//-------------------------
+//TextBox
+//-------------------------
+
+TextBox::TextBox() {
+	//
+}
+
+TextBox::~TextBox() {
+	//
+}
+
+void TextBox::DrawTo(SDL_Renderer* renderer, int posX, int posY, int pointSize) {
+	for (std::list<TextLine>::iterator it = lineList.begin(); it != lineList.end(); it++) {
+		it->DrawTo(renderer, posX, posY);
+		posY -= pointSize;
+	}
+}
+
+void TextBox::PushLine(SDL_Renderer* renderer, TTF_Font* font, std::string str, SDL_Color color) {
+	lineList.emplace_front(renderer, font, str, color);
+}
+
+void TextBox::PopLine(int num) {
+	//prevent underflow
+	num < lineList.size() ? num : lineList.size();
+
+	for (int i = 0; i < num; ++i) {
+		lineList.pop_back();
+	}
+}
+
+void TextBox::ClearLines() {
+	lineList.clear();
+}

src/common/text_box.hpp

@@ -25,14 +25,19 @@
 #include "SDL2/SDL_ttf.h"
 
 #include <string>
+#include <list>
 
 constexpr SDL_Color COLOR_WHITE = {255, 255, 255, 255};
 
 SDL_Texture* renderTextTexture(SDL_Renderer*, TTF_Font*, std::string, SDL_Color color);
 
+//-------------------------
+
 class TextLine {
 public:
 	TextLine();
+	TextLine(SDL_Renderer* r, TTF_Font* f, std::string s, SDL_Color c)
+		{ SetText(r, f, s, c); }
 	~TextLine();
 
 	void DrawTo(SDL_Renderer*, int posX, int posY);
@@ -43,3 +48,20 @@ public:
 protected:
 	SDL_Texture* texture = nullptr;
 };
+
+//-------------------------
+
+class TextBox {
+public:
+	TextBox();
+	~TextBox();
+
+	void DrawTo(SDL_Renderer*, int posX, int posY, int pointSize);
+
+	void PushLine(SDL_Renderer*, TTF_Font*, std::string, SDL_Color color);
+	void PopLine(int num = 1);
+	void ClearLines();
+
+private:
+	std::list<TextLine> lineList;
+};

src/example_scene.cpp

@@ -63,7 +63,10 @@ ExampleScene::ExampleScene(lua_State* L) {
 //	{140, 62, 54, 255}
 
 	//DEBUG: testing textLine
-	textLine.SetText(GetRenderer(), font, "Button Text", {255, 255, 255, 255});
+	textBox.PushLine(GetRenderer(), font, "first line", {255, 255, 255, 255});
+	textBox.PushLine(GetRenderer(), font, "second line", {255, 255, 255, 255});
+	textBox.PushLine(GetRenderer(), font, "third line", {255, 255, 255, 255});
+	textBox.PushLine(GetRenderer(), font, "FOURTH LINE!!", {255, 0, 0, 0});
 }
 
 ExampleScene::~ExampleScene() {
@@ -94,7 +97,7 @@ void ExampleScene::RenderFrame(SDL_Renderer* renderer) {
 
 	//DEBUG: testing UI
 	button.DrawTo(renderer);
-	textLine.DrawTo(renderer, 0, 550);
+	textBox.DrawTo(renderer, 0, 550, 12);
 }
 
 //-------------------------
@@ -196,6 +199,10 @@ void ExampleScene::KeyDown(SDL_KeyboardEvent const& event) {
 		case SDLK_SPACE:
 			camera.scale = 1.0;
 		break;
+
+		case SDLK_RETURN:
+			textBox.PushLine(GetRenderer(), font, "You pressed enter.", {128, 128, 128, 255});
+		break;
 	}
 }
 

src/example_scene.hpp

@@ -67,5 +67,5 @@ private:
 	TTF_Font* font = nullptr;
 	Image buttonBG;
 	Button button;
-	TextLine textLine;
+	TextBox textBox;
 };