Keyboard captures

src/kekengine/cpp/defaults.cpp

@@ -13,11 +13,14 @@ static KeyBinding
 	keyUp,
 	keyDown,
 	keyOptions,
-	keyToggleCursorMode;
+	keyToggleCursorMode,
+	keyExit;
 
 static ButtonElement *options;
 
 static void defaultInput(GLFWwindow *window, void *data) {
+	if(Input::isKeyboardCaptured()) return;
+
 	if(Input::getKeyState(keyForward) == GLFW_PRESS) {
 		kekData.activeCamera->translate(kekData.activeCamera->direction * KEK_NOCLIP_SPEED * kekData.lastFrameTime);
 	}
@@ -46,6 +49,10 @@ static void defaultInput(GLFWwindow *window, void *data) {
 }
 
 static void defaultKeyCallback(GLFWwindow *window, int key, int scancode, int action, int mods, void *data) {
+	if(key == Input::getKeyBinding(keyExit).key && action == GLFW_PRESS) {
+		glfwSetWindowShouldClose(window, true);
+	}
+
 	if(key == Input::getKeyBinding(keyOptions).key && action == GLFW_PRESS) {
 		options->visible = !options->visible;
 	}
@@ -128,6 +135,7 @@ void init() {
 	keyDown = Input::createKeyBinding("Down", GLFW_KEY_LEFT_CONTROL);
 	keyOptions = Input::createKeyBinding("Options", GLFW_KEY_Q);
 	keyToggleCursorMode = Input::createKeyBinding("Toggle Cursor Mode", GLFW_KEY_TAB);
+	keyExit = Input::createKeyBinding("Exit", GLFW_KEY_ESCAPE);
 
 	Input::addPeriodicCallback(PeriodicCallback(defaultInput, nullptr));
 	Input::addKeyListener(KeyCallback(defaultKeyCallback, nullptr));

src/kekengine/cpp/engine.cpp

@@ -50,11 +50,27 @@ static void onCursorPosCallback(GLFWwindow *window, double x, double y) {
 }
 
 static void onKeyCallback(GLFWwindow *window, int key, int scancode, int action, int mods) {
+	if(Input::isKeyboardCaptured()) {
+		if(key == GLFW_KEY_ESCAPE && action == GLFW_PRESS) Input::uncaptureKeyboardInput(kekData.activeKeyboardCapture.id);
+		return;
+	}
+
 	for(auto cb : kekData.keyCallbacks) {
 		cb.second(window, key, scancode, action, mods);
 	}
 }
 
+static void onKeyCharCallback(GLFWwindow *window, unsigned int codepoint) {
+	if(Input::isKeyboardCaptured()) {
+		kekData.activeKeyboardCapture.callback(window, codepoint);
+		return;
+	}
+
+	for(auto cb : kekData.keyCharCallbacks) {
+		cb.second(window, codepoint);
+	}
+}
+
 void onMouseButtonCallback(GLFWwindow* window, int button, int action, int mods) {
 	for(auto cb : kekData.mouseButtonCallbacks) {
 		cb.second(window, button, action, mods);
@@ -159,6 +175,7 @@ int init() {
 	glfwSetCursorPosCallback(kekData.window, onCursorPosCallback);
 	Input::setCursorMode(GLFWCursorMode::CAPTURE);
 	glfwSetKeyCallback(kekData.window, onKeyCallback);
+	glfwSetCharCallback(kekData.window, onKeyCharCallback);
 	glfwSetMouseButtonCallback(kekData.window, onMouseButtonCallback);
 
 	glClearColor(0.1f, 0.3f, 0.1f, 0.0f);
@@ -195,10 +212,6 @@ int start() {
 			cb.second(kekData.window);
 		}
 
-		if(glfwGetKey(kekData.window, GLFW_KEY_ESCAPE) == GLFW_PRESS) {
-			break;
-		}
-
 		kekData.shader->use();
 
 		glm::mat4 view = kekData.activeCamera->transformationMatrix();

src/kekengine/cpp/input.cpp

@@ -29,6 +29,16 @@ void removeKeyListener(InputListener listener) {
 	kekData.keyCallbacks.erase(listener);
 }
 
+InputListener addKeyCharListener(KeyCharCallback callback) {
+	InputListener id = nextID++;
+	kekData.keyCharCallbacks.emplace(id, callback);
+	return id;
+}
+
+void removeKeyCharListener(InputListener listener) {
+	kekData.keyCharCallbacks.erase(listener);
+}
+
 InputListener addMouseListener(MouseCallback callback) {
 	InputListener id = nextID++;
 	kekData.mouseCallbacks.emplace(id, callback);
@@ -50,7 +60,7 @@ void removeMouseButtonListener(InputListener listener) {
 }
 
 KeyBinding createKeyBinding(std::string name, GLFWKey defaultKey) {
-	if(name == KEK_INVALID_KEY_BINDING_NAME) return KEK_INVALID_KEY_BINDING;
+	if(name == KEK_INVALID_KEY_BINDING_NAME) return KEK_INVALID_ID;
 	KeyBinding id = nextID++;
 	KeyBindingData d;
 	d.name = name;
@@ -60,7 +70,7 @@ KeyBinding createKeyBinding(std::string name, GLFWKey defaultKey) {
 }
 
 void reassignKeyBinding(KeyBinding binding, GLFWKey key) {
-	if(binding == KEK_INVALID_KEY_BINDING) return;
+	if(binding == KEK_INVALID_ID) return;
 	auto it = kekData.keyBindings.find(binding);
 	if(it == kekData.keyBindings.end()) return;
 	KeyBindingData d = it->second;
@@ -89,4 +99,24 @@ GLFWCursorMode getCursorMode() {
 	return kekData.uiCursorMode;
 }
 
+KeyboardCapture captureKeyboardInput(KeyCharCallback callback, Callable uncaptureCallback) {
+	KeyboardCapture id = nextID++;
+	kekData.activeKeyboardCapture.id = id;
+	kekData.activeKeyboardCapture.callback = callback;
+	kekData.activeKeyboardCapture.uncaptureCallback = uncaptureCallback;
+	return id;
+}
+
+bool uncaptureKeyboardInput(KeyboardCapture capture) {
+	if(capture == KEK_INVALID_ID || capture != kekData.activeKeyboardCapture.id) return false;
+	kekData.activeKeyboardCapture.id = KEK_INVALID_ID;
+	kekData.activeKeyboardCapture.callback = KeyCharCallback();
+	kekData.activeKeyboardCapture.uncaptureCallback = Callable();
+	return true;
+}
+
+bool isKeyboardCaptured() {
+	return kekData.activeKeyboardCapture.id != KEK_INVALID_ID;
+}
+
 }

src/kekengine/cpp/uielements.cpp

@@ -55,6 +55,10 @@ void TextElement::setText(std::string text) {
 	this->text->setText(text);
 }
 
+std::string TextElement::getText() {
+	return text->getText();
+}
+
 void TextElement::draw(UIPoint screenPos, glm::mat4 projection) {
 	UIBounds offset = getBounds();
 

src/kekengine/cpp/unicode.cpp

@@ -0,0 +1,17 @@
+#include "unicode.h"
+
+#include <locale>
+
+namespace kek::Unicode {
+
+static std::wstring_convert<std::codecvt_utf8<char32_t>, char32_t> utf32cvt;
+
+std::u32string convertStdToU32(std::string string) {
+	return utf32cvt.from_bytes(string);
+}
+
+std::string convertU32ToStd(std::u32string string) {
+	return utf32cvt.to_bytes(string);
+}
+
+}

src/kekengine/include/constants.h

@@ -27,14 +27,14 @@
 #define KEK_LIGHT_MAX_DISTANCE_SQUARED (KEK_LIGHT_MAX_DISTANCE * KEK_LIGHT_MAX_DISTANCE)
 
 #define KEK_INVALID_KEY_BINDING_NAME "INVALID"
-#define KEK_INVALID_KEY_BINDING -1u
+#define KEK_INVALID_ID -1u
 
 #define KEK_FONT_RESOLUTION 64
 #define KEK_FONT_BITMAP_WIDTH_BLOCKS 16
 #define KEK_FONT_BITMAP_HEIGHT_BLOCKS 16
 #define KEK_FONT_BITMAP_WIDTH (KEK_FONT_BITMAP_WIDTH_BLOCKS * KEK_FONT_RESOLUTION)
 #define KEK_FONT_BITMAP_HEIGHT (KEK_FONT_BITMAP_HEIGHT_BLOCKS * KEK_FONT_RESOLUTION)
-#define KEK_FONT_BITMAP_CHAR_BITS 8 // = log2(KEK_FONT_BITMAP_WIDTH_BLOCKS * KEK_FONT_BITMAP_HEIGHT_BLOCKS)
+#define KEK_FONT_BITMAP_CHAR_BITS 8 // = ceil(log2(KEK_FONT_BITMAP_WIDTH_BLOCKS * KEK_FONT_BITMAP_HEIGHT_BLOCKS))
 #define KEK_FONT_BITMAP_CHAR_MASK 0xFF // = KEK_FONT_BITMAP_CHAR_BITS 1s in binary
 #define KEK_TEXT_BLOCK_SIZE 8
 

src/kekengine/include/input.h

@@ -9,6 +9,7 @@ namespace kek {
 
 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 *, unsigned int> KeyCharCallback; // keyCharCallback(GLFWwindow *window, unsigned int codepoint)
 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)
 
@@ -16,6 +17,7 @@ typedef unsigned int InputListener;
 typedef int GLFWKey;
 typedef int GLFWKeyState;
 typedef unsigned int KeyBinding;
+typedef unsigned int KeyboardCapture;
 
 struct KeyBindingData {
 	std::string name;
@@ -44,6 +46,9 @@ void removePeriodicCallback(InputListener listener);
 InputListener addKeyListener(KeyCallback callback);
 void removeKeyListener(InputListener listener);
 
+InputListener addKeyCharListener(KeyCharCallback callback);
+void removeKeyCharListener(InputListener listener);
+
 InputListener addMouseListener(MouseCallback callback);
 void removeMouseListener(InputListener listener);
 
@@ -58,4 +63,8 @@ GLFWKeyState getKeyState(KeyBinding mapping);
 void setCursorMode(GLFWCursorMode mode);
 GLFWCursorMode getCursorMode();
 
+KeyboardCapture captureKeyboardInput(KeyCharCallback callback, Callable uncaptureCallback);
+bool uncaptureKeyboardInput(KeyboardCapture capture);
+bool isKeyboardCaptured();
+
 }

src/kekengine/include/internal.h

@@ -13,9 +13,16 @@
 
 namespace kek {
 
+struct ActiveKeyboardCapture {
+	KeyboardCapture id = KEK_INVALID_ID;
+	KeyCharCallback callback;
+	Callable uncaptureCallback;
+};
+
 struct KekData {
 	std::map<InputListener, PeriodicCallback> periodicCallbacks;
 	std::map<InputListener, KeyCallback> keyCallbacks;
+	std::map<InputListener, KeyCharCallback> keyCharCallbacks;
 	std::map<InputListener, MouseCallback> mouseCallbacks;
 	std::map<InputListener, MouseButtonCallback> mouseButtonCallbacks;
 	std::map<KeyBinding, KeyBindingData> keyBindings;
@@ -39,6 +46,7 @@ struct KekData {
 	Font *uiDefaultFont;
 	Shader *uiRectangleShader;
 	GLFWCursorMode uiCursorMode;
+	ActiveKeyboardCapture activeKeyboardCapture;
 };
 
 extern KekData kekData;

src/kekengine/include/kekengine.h

@@ -13,6 +13,7 @@
 #include "scene.h"
 #include "shader.h"
 #include "types.h"
-#include "utils.h"
 #include "ui.h"
+#include "unicode.h"
 #include "uielements.h"
+#include "utils.h"

src/kekengine/include/uielements.h

@@ -51,6 +51,8 @@ public:
 
 	void setText(std::string text);
 
+	std::string getText();
+
 	virtual void draw(UIPoint screenPos, glm::mat4 projection);
 
 };

src/kekengine/include/unicode.h

@@ -0,0 +1,10 @@
+#pragma once
+
+#include <codecvt>
+
+namespace kek::Unicode {
+
+std::u32string convertStdToU32(std::string string);
+std::string convertU32ToStd(std::u32string string);
+
+}

src/kekgame/cpp/kekgame.cpp

@@ -6,6 +6,8 @@
 
 using namespace kek;
 
+static ButtonElement *button;
+
 void periodicCallback(GLFWwindow *window, void *data){
 
 }
@@ -19,7 +21,11 @@ void mouseButtonCallback(GLFWwindow *window, int button, int action, int mods, v
 }
 
 void onButtonClick(void *data) {
-	std::cout << "Clicked!" << std::endl;
+	Input::captureKeyboardInput(KeyCharCallback([](GLFWwindow *window, unsigned int codepoint, void *data) {
+		std::u32string str = Unicode::convertStdToU32(button->text->getText());
+		str.push_back(codepoint);
+		button->text->setText(Unicode::convertU32ToStd(str));
+	}, nullptr), Callable());
 }
 
 int main(int argc, char **argv) {
@@ -58,13 +64,13 @@ int main(int argc, char **argv) {
 	Input::addKeyListener(KeyCallback(keyCallback, nullptr));
 	Input::addMouseButtonListener(MouseButtonCallback(mouseButtonCallback, nullptr));
 
-	ButtonElement *btn = new ButtonElement(px(10), px(100), px(200), px(50));
+	button = new ButtonElement(px(10), px(100), px(200), px(50));
-	btn->text->color = Colors::BLACK;
+	button->text->color = Colors::BLACK;
-	btn->color = Colors::WHITE;
+	button->color = Colors::WHITE;
-	btn->hoverColor = Colors::GRAY;
+	button->hoverColor = Colors::GRAY;
-	btn->text->setText("Hello There!");
+	button->text->setText("Hello There!");
-	btn->onClick = Callable(onButtonClick, nullptr);
+	button->onClick = Callable(onButtonClick, nullptr);
-	UI::addElement(btn);
+	UI::addElement(button);
 
 	Engine::start();
 }