Clean up UI stuff, More UI elements (WIP)

src/kekengine/cpp/defaults.cpp

@@ -1,17 +1,22 @@
 #include "input.h"
+#include "ui.h"
+#include "uielements.h"
 #include "internal.h"
 
 namespace kek::Defaults {
 
-static int
+static KeyBinding
 	keyForward,
 	keyBackward,
 	keyLeft,
 	keyRight,
 	keyUp,
-	keyDown;
+	keyDown,
+	keyOptions;
 
-void defaultInput(GLFWwindow *window, void *data) {
+static ButtonElement *options;
+
+static void defaultInput(GLFWwindow *window, void *data) {
 	if(Input::getKeyState(keyForward) == GLFW_PRESS) {
 		kekData.activeCamera->translate(kekData.activeCamera->direction * KEK_NOCLIP_SPEED * kekData.lastFrameTime);
 	}
@@ -39,6 +44,12 @@ void defaultInput(GLFWwindow *window, void *data) {
 	}
 }
 
+static void defaultKey(GLFWwindow *window, int key, int scancode, int action, int mods, void *data) {
+	if(key == Input::getKeyBinding(keyOptions).key && action == GLFW_PRESS) {
+		options->visible = !options->visible;
+	}
+}
+
 void init() {
 	keyForward = Input::createKeyBinding("Forward", GLFW_KEY_W);
 	keyBackward = Input::createKeyBinding("Backward", GLFW_KEY_S);
@@ -46,8 +57,13 @@ void init() {
 	keyRight = Input::createKeyBinding("Right", GLFW_KEY_D);
 	keyUp = Input::createKeyBinding("Up", GLFW_KEY_SPACE);
 	keyDown = Input::createKeyBinding("Down", GLFW_KEY_LEFT_CONTROL);
+	keyOptions = Input::createKeyBinding("Options", GLFW_KEY_Q);
 
 	Input::addPeriodicCallback(PeriodicCallback(defaultInput, nullptr));
+	Input::addKeyListener(KeyCallback(defaultKey, nullptr));
+
+	options = new ButtonElement(px(0), px(100), px(100), px(50));
+	UI::addElement(options);
 }
 
 }

src/kekengine/cpp/engine.cpp

@@ -180,9 +180,9 @@ int init() {
 		return KEK_ERROR;
 	}
 
-	UIElement::init();
-
+	UI::init();
 	Defaults::init();
+
 	fpsText = new TextElement(px(0), px(0));
 	UI::addElement(fpsText);
 

src/kekengine/cpp/ui.cpp

@@ -32,8 +32,6 @@ constexpr UIValue operator-(const UIValue& lhs, const UIValue& rhs) {
 	return UIValue(lhs) -= rhs;
 }
 
-Font *UIElement::defaultFont = nullptr;
-
 UIElement::UIElement(UIValue x, UIValue y): x(x), y(y) {
 
 }
@@ -70,7 +68,7 @@ void UIElement::removeChild(UIElement *child) {
 	std::remove(children.begin(), children.end(), child);
 }
 
-inline int UIElement::uiToScreen(UIValue val) {
+int UIElement::uiToScreen(UIValue val) {
 	float px = 0;
 	px += val.pixels;
 	if(parent) px += (int) (val.parentWidth * parent->getBounds().w);
@@ -92,11 +90,11 @@ void UIElement::drawAll(UIPoint screenPos, glm::mat4 projection) {
 	}
 }
 
-void UIElement::hoverAll(UIPoint pos, UIPoint screenPos) {
+bool UIElement::hoverAll(UIPoint pos, UIPoint screenPos) {
 	UIBounds bounds = getBounds();
 	if(!bounds.contains(pos)) { // Only used by topmost parent UIElement
 		if(hovering) hoverExitAll();
-		return;
+		return false;
 	}
 
 	UIElement *hoveredChild = NULL;
@@ -121,6 +119,7 @@ void UIElement::hoverAll(UIPoint pos, UIPoint screenPos) {
 	if(!hovering) hoverEnter(pos, screenPos);
 	hovering = true;
 	hover(pos, screenPos);
+	return true;
 }
 
 void UIElement::hoverExitAll() {
@@ -132,9 +131,9 @@ void UIElement::hoverExitAll() {
 	hoverExit();
 }
 
-void UIElement::clickAll(UIPoint pos, UIPoint screenPos, GLFWMouseButton button) {
+bool UIElement::clickAll(UIPoint pos, UIPoint screenPos, GLFWMouseButton button) {
 	UIBounds bounds = getBounds();
-	if(!bounds.contains(pos)) return; // Only used by topmost parent UIElement
+	if(!bounds.contains(pos)) return false; // Only used by topmost parent UIElement
 
 	UIElement *clickedChild = NULL;
 	for(UIElement *child : children) {
@@ -153,6 +152,8 @@ void UIElement::clickAll(UIPoint pos, UIPoint screenPos, GLFWMouseButton button)
 	}else {
 		click(pos, screenPos, button);
 	}
+
+	return true;
 }
 
 bool UIElement::focusEnterAll(UIPoint pos, UIPoint screenPos) {
@@ -208,8 +209,14 @@ UIElement *UIElement::dragEnterAll(UIPoint pos, UIPoint screenPos) {
 	return nullptr;
 }
 
-void UIElement::init() {
-	defaultFont = new Font(KEK_DEFAULT_FONT);
+void UI::init() {
+	kekData.uiDefaultFont = new Font(KEK_DEFAULT_FONT);
+	kekData.uiRectangleShader = new Shader("shader/rectangle/vertex.glsl", "shader/rectangle/fragment.glsl");
+}
+
+void UI::destroy() {
+	delete kekData.uiDefaultFont;
+	delete kekData.uiRectangleShader;
 }
 
 void UI::addElement(UIElement *element) {

src/kekengine/cpp/uielements.cpp

@@ -1,5 +1,9 @@
 #include "uielements.h"
 
+#include <glm/gtc/type_ptr.hpp>
+
+#include "internal.h"
+
 namespace kek {
 
 static inline int offsetX(int w, Origin origin) {
@@ -56,7 +60,7 @@ TextElement::TextElement(UIValue x, UIValue y, Font *font): UIElement(x, y) {
 	this->textBounds = TextBounds::SMALLEST;
 }
 
-TextElement::TextElement(UIValue x, UIValue y): TextElement(x, y, UIElement::defaultFont) {}
+TextElement::TextElement(UIValue x, UIValue y): TextElement(x, y, kekData.uiDefaultFont) {}
 
 TextElement::~TextElement() {
 	delete text;
@@ -97,22 +101,6 @@ void TextElement::setText(std::string text) {
 	this->text->setText(text);
 }
 
-void TextElement::setSizePixels(int sizePixels) {
-	this->sizePixels = sizePixels;
-}
-
-void TextElement::setColor(Color color) {
-	this->color = color;
-}
-
-void TextElement::setTextMode(TextMode textMode) {
-	this->textMode = textMode;
-}
-
-void TextElement::setTextBounds(TextBounds textBounds) {
-	this->textBounds = textBounds;
-}
-
 void TextElement::draw(UIPoint screenPos, glm::mat4 projection) {
 	UIBounds offset = getBounds();
 
@@ -153,4 +141,101 @@ void UIWindow::draw(UIPoint screenPos, glm::mat4 projection) {
 
 }
 
+static float rectangleVerts[] = {
+	0.0f, 1.0f,
+	1.0f, 1.0f,
+	1.0f, 0.0f,
+	1.0f, 0.0f,
+	0.0f, 0.0f,
+	0.0f, 1.0f,
+};
+
+RectangleElement::RectangleElement(UIValue x, UIValue y, UIValue w, UIValue h): UIElement(x, y) {
+	this->w = w;
+	this->h = h;
+	this->color = Colors::BLACK;
+
+	glGenVertexArrays(1, &vao);
+	glGenBuffers(1, &vbo);
+	glBindVertexArray(vao);
+	glBindBuffer(GL_ARRAY_BUFFER, vbo);
+	glBufferData(GL_ARRAY_BUFFER, sizeof(rectangleVerts), rectangleVerts, GL_STATIC_DRAW);
+
+	glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 2 * sizeof(float), 0);
+	glEnableVertexAttribArray(0);
+
+	glBindVertexArray(0);
+}
+
+RectangleElement::~RectangleElement() {
+	glDeleteVertexArrays(1, &vao);
+	glDeleteBuffers(1, &vbo);
+}
+
+UIElementType RectangleElement::getType() {
+	return UIElementType::RECTANGLE;
+}
+
+UIBounds RectangleElement::getBounds() {
+	return offsetUIBounds(uiToScreen(w), uiToScreen(h), origin);
+}
+
+void RectangleElement::setColor(Color color) {
+	this->color = color;
+}
+
+void RectangleElement::draw(UIPoint screenPos, glm::mat4 projection) {
+	kekData.uiRectangleShader->use();
+
+	UIBounds offset = getBounds();
+
+	glUniformMatrix4fv(glGetUniformLocation(kekData.uiRectangleShader->id, "projection"), 1, GL_FALSE, glm::value_ptr(projection));
+	glm::vec4 bounds = glm::vec4(offset.x + screenPos.x, offset.y + screenPos.y, uiToScreen(w), uiToScreen(h));
+	glUniform4fv(glGetUniformLocation(kekData.uiRectangleShader->id, "bounds"), 1, glm::value_ptr(bounds));
+	glUniform4fv(glGetUniformLocation(kekData.uiRectangleShader->id, "rectColor"), 1, color.valuePointer());
+
+	glBindVertexArray(vao);
+	glDrawArrays(GL_TRIANGLES, 0, 6);
+}
+
+ButtonElement::ButtonElement(UIValue x, UIValue y, UIValue w, UIValue h): RectangleElement(x, y, w, h) {
+	this->text = new TextElement(px(0), px(0));
+}
+
+ButtonElement::~ButtonElement() {
+	delete text;
+}
+
+UIElementType ButtonElement::getType() {
+	return UIElementType::BUTTON;
+}
+
+TextElement *ButtonElement::getText() {
+	return text;
+}
+
+void ButtonElement::setColor(Color color) {
+
+}
+
+void ButtonElement::setOnClickCallback(Callable onClick) {
+	this->onClick = onClick;
+}
+
+void ButtonElement::hover(UIPoint pos, UIPoint screenPos) {
+
+}
+
+void ButtonElement::hoverEnter() {
+	RectangleElement::setColor(Colors::RED);
+}
+
+void ButtonElement::hoverExit() {
+
+}
+
+void ButtonElement::click(UIPoint pos, UIPoint screenPos, GLFWMouseButton button) {
+
+}
+
 }

src/kekengine/include/input.h

@@ -7,10 +7,10 @@
 
 namespace kek {
 
-typedef generic_callable_t<GLFWwindow *> PeriodicCallback; // periodicCallback(GLFWwindow *window)
-typedef generic_callable_t<GLFWwindow *, int, int, int, int> KeyCallback; // keyCallback(GLFWwindow *window, int key, int scancode, int action, int mods)
-typedef generic_callable_t<GLFWwindow *, double, double> MouseCallback; // mouseCallback(GLFWwindow *window, double x, double y)
-typedef generic_callable_t<GLFWwindow *, int, int, int> MouseButtonCallback; // void mouseButtonCallback(GLFWwindow* window, int button, int action, int mods)
+typedef GenericCallable<GLFWwindow *> PeriodicCallback; // periodicCallback(GLFWwindow *window)
+typedef GenericCallable<GLFWwindow *, int, int, int, int> KeyCallback; // keyCallback(GLFWwindow *window, int key, int scancode, int action, int mods)
+typedef GenericCallable<GLFWwindow *, double, double> MouseCallback; // mouseCallback(GLFWwindow *window, double x, double y)
+typedef GenericCallable<GLFWwindow *, int, int, int> MouseButtonCallback; // void mouseButtonCallback(GLFWwindow* window, int button, int action, int mods)
 
 typedef unsigned int InputListener;
 typedef int GLFWKey;

src/kekengine/include/internal.h

@@ -36,6 +36,8 @@ struct KekData {
 	FT_Library freetype;
 
 	std::vector<UIElement *> uiElements;
+	Font *uiDefaultFont;
+	Shader *uiRectangleShader;
 };
 
 extern KekData kekData;

src/kekengine/include/ui.h

@@ -120,8 +120,6 @@ struct UIValue {
 class UIElement {
 
 protected:
-	static Font *defaultFont;
-
 	UIElement *parent = nullptr;
 	std::vector<UIElement *> children;
 
@@ -147,62 +145,50 @@ public:
 	UIPoint getScreenPosition();
 
 	std::vector<UIElement *> getChildren();
-
 	void addChild(UIElement *child);
-
 	void removeChild(UIElement *child);
 
 protected:
-	inline int uiToScreen(UIValue val);
+	int uiToScreen(UIValue val);
 
 public:
 	// Returns the bounds of the element relative to its origin (as returned by getX() and getY())
 	virtual UIBounds getBounds() = 0;
 
 	void drawAll(UIPoint screenPos, glm::mat4 projection);
-
 	virtual void draw(UIPoint screenPos, glm::mat4 projection) = 0;
 
-	void hoverAll(UIPoint pos, UIPoint screenPos);
-
+	bool hoverAll(UIPoint pos, UIPoint screenPos);
 	void hoverExitAll();
-
 	virtual void hoverEnter(UIPoint pos, UIPoint screenPos) {};
-
 	virtual void hover(UIPoint pos, UIPoint screenPos) {};
-
 	virtual void hoverExit() {};
 
-	void clickAll(UIPoint pos, UIPoint screenPos, GLFWMouseButton button);
-
+	bool clickAll(UIPoint pos, UIPoint screenPos, GLFWMouseButton button);
 	virtual void click(UIPoint pos, UIPoint screenPos, GLFWMouseButton button) {};
 
 	bool focusEnterAll(UIPoint pos, UIPoint screenPos);
-
 	virtual void focusEnter(UIPoint pos, UIPoint screenPos) {};
-
 	virtual void focusExit() {};
 
 	UIElement *dragEnterAll(UIPoint pos, UIPoint screenPos);
-
 	virtual void dragEnter(UIPoint pos, UIPoint screenPos) {};
-
 	virtual void drag(UIPoint pos, UIPoint screenPos) {};
-
 	virtual void dragExit(UIPoint pos, UIPoint screenPos) {};
 
-	static void init();
-
 };
 
 namespace UI {
 
-void addElement(UIElement *element);
-
-void removeElement(UIElement *element);
+void init();
+void destroy();
 
 std::vector<UIElement *> getElements();
+void addElement(UIElement *element);
+void removeElement(UIElement *element);
 
 };
 
 }
+
+#include "uielements.h"

src/kekengine/include/uielements.h

@@ -20,12 +20,13 @@ class TextElement: public UIElement {
 
 protected:
 	TextObject *text;
+
+public:
 	int sizePixels;
 	Color color;
 	TextMode textMode;
 	TextBounds textBounds;
 
-public:
 	TextElement(UIValue x, UIValue y, Font *font);
 
 	TextElement(UIValue x, UIValue y);
@@ -38,16 +39,62 @@ public:
 
 	void setText(std::string text);
 
-	void setSizePixels(int sizePixels);
+	virtual void draw(UIPoint screenPos, glm::mat4 projection);
 
-	void setColor(Color color);
+};
 
-	void setTextMode(TextMode textMode);
+class RectangleElement: public UIElement {
 
-	void setTextBounds(TextBounds textBounds);
+protected:
+	UIValue w, h;
+	Color color;
+
+	unsigned int vao;
+	unsigned int vbo;
+
+public:
+	RectangleElement(UIValue x, UIValue y, UIValue w, UIValue h);
+
+	virtual ~RectangleElement();
+
+	virtual UIElementType getType();
+
+	virtual UIBounds getBounds();
+
+	virtual void setColor(Color color);
 
 	virtual void draw(UIPoint screenPos, glm::mat4 projection);
 
 };
 
+class ButtonElement: public RectangleElement {
+
+protected:
+	TextElement *text;
+	Color color;
+	Callable onClick;
+
+public:
+	ButtonElement(UIValue x, UIValue y, UIValue w, UIValue h);
+
+	virtual ~ButtonElement();
+
+	virtual UIElementType getType();
+
+	TextElement *getText();
+
+	virtual void setColor(Color color);
+
+	void setOnClickCallback(Callable onClick);
+
+	virtual void hover(UIPoint pos, UIPoint screenPos);
+
+	virtual void hoverEnter();
+
+	virtual void hoverExit();
+
+	virtual void click(UIPoint pos, UIPoint screenPos, GLFWMouseButton button);
+
+};
+
 }

src/kekengine/include/utils.h

@@ -9,21 +9,24 @@
 namespace kek {
 
 template<typename ...Args>
-using generic_function_t = void(*)(Args... args);
+using GenericFunction = void(*)(Args... args);
 
 template<typename ...Args>
-struct generic_callable_t {
-	generic_function_t<Args..., void *> function;
+struct GenericCallable {
+	GenericFunction<Args..., void *> function;
 	void *data;
 
-	generic_callable_t(generic_function_t<Args..., void *> function, void *data): function(function), data(data) {}
+	GenericCallable(): function(nullptr), data(nullptr) {}
+
+	GenericCallable(GenericFunction<Args..., void *> function, void *data): function(function), data(data) {}
 
 	void operator()(Args... args) {
+		if(function == nullptr) return;
 		function(args..., data);
 	}
 };
 
-typedef generic_callable_t<> callable_t;
+typedef GenericCallable<> Callable;
 
 float clampCyclic(float value, float min, float max);
 

src/kekengine/res/shader/rectangle/fragment.glsl

@@ -0,0 +1,9 @@
+#version 330 core
+
+out vec4 color;
+
+uniform vec4 rectColor;
+
+void main() {
+	color = rectColor;
+}

src/kekengine/res/shader/rectangle/vertex.glsl

@@ -0,0 +1,10 @@
+#version 330 core
+
+layout (location = 0) in vec2 position;
+
+uniform mat4 projection;
+uniform vec4 bounds;
+
+void main() {
+	gl_Position = projection * vec4(position * bounds.zw + bounds.xy, 0.0, 1.0);
+}

src/kekgame/cpp/kekgame.cpp

@@ -17,6 +17,11 @@ void periodicCallback(GLFWwindow *window, void *data){
 void keyCallback(GLFWwindow *window, int key, int scancode, int action, int mods, void *data){
 	if(key == Input::getKeyBinding(keyWow).key && action == GLFW_PRESS) {
 		std::cout << "WOW" << std::endl;
+		if(glfwGetInputMode(window, GLFW_CURSOR) == GLFW_CURSOR_DISABLED) {
+			glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_NORMAL);
+		}else {
+			glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
+		}
 	}
 }
 
@@ -61,5 +66,9 @@ int main(int argc, char **argv) {
 	Input::addKeyListener(KeyCallback(keyCallback, nullptr));
 	Input::addMouseButtonListener(MouseButtonCallback(mouseButtonCallback, nullptr));
 
+	ButtonElement *btn = new ButtonElement(px(0), px(100), px(200), px(50));
+	btn->getText()->setText("Hello There!");
+	UI::addElement(btn);
+
 	Engine::start();
 }