Add checkbox, scale more sizes by window scale

src/gui/CheckBox.cpp

@@ -0,0 +1,71 @@
+#include "../../include/gui/CheckBox.hpp"
+#include "../../include/gui/Utils.hpp"
+#include "../../include/Theme.hpp"
+#include <mglpp/graphics/Rectangle.hpp>
+#include <mglpp/window/Window.hpp>
+#include <mglpp/window/Event.hpp>
+#include <mglpp/system/FloatRect.hpp>
+
+namespace gsr {
+    static const float spacing_scale = 0.005f;
+    static const float checked_margin_scale = 0.003f;
+    static const float border_scale = 0.001f;
+
+    CheckBox::CheckBox(mgl::Font *font, const char *text) : text(text, *font) {
+
+    }
+
+    bool CheckBox::on_event(mgl::Event &event, mgl::Window&, mgl::vec2f offset) {
+        if(event.type == mgl::Event::MouseButtonPressed && event.mouse_button.button == mgl::Mouse::Left) {
+            const bool clicked_inside = mgl::FloatRect(position + offset, get_size()).contains({ (float)event.mouse_button.x, (float)event.mouse_button.y });
+            if(clicked_inside) {
+                checked = !checked;
+                if(on_click)
+                    on_click();
+            }
+        }
+        return true;
+    }
+
+    void CheckBox::draw(mgl::Window &window, mgl::vec2f offset) {
+        const mgl::vec2f draw_pos = position + offset;
+
+        const mgl::vec2f checkbox_size = get_checkbox_size();
+        mgl::Rectangle background(get_checkbox_size());
+        background.set_position(draw_pos.floor());
+        background.set_color(mgl::Color(0, 0, 0, 120));
+        window.draw(background);
+
+        if(checked) {
+            const float side_margin = checked_margin_scale * get_theme().window_height;
+            mgl::Rectangle background(get_checkbox_size() - mgl::vec2f(side_margin, side_margin).floor() * 2.0f);
+            background.set_position(draw_pos.floor() + mgl::vec2f(side_margin, side_margin).floor());
+            background.set_color(gsr::get_theme().tint_color);
+            window.draw(background);
+        }
+
+        const mgl::vec2f text_bounds = text.get_bounds().size;
+        text.set_position((draw_pos + mgl::vec2f(checkbox_size.x + spacing_scale * get_theme().window_height, checkbox_size.y * 0.5f - text_bounds.y * 0.5f)).floor());
+        window.draw(text);
+
+        const bool mouse_inside = mgl::FloatRect(draw_pos, get_size()).contains(window.get_mouse_position().to_vec2f());
+        if(mouse_inside) {
+            const int border_size = border_scale * gsr::get_theme().window_height;
+            const mgl::Color border_color = gsr::get_theme().tint_color;
+            draw_rectangle_outline(window, draw_pos, checkbox_size, border_color, border_size);
+        }
+    }
+
+    mgl::vec2f CheckBox::get_size() {
+        mgl::vec2f size = text.get_bounds().size;
+        const mgl::vec2f checkbox_size = get_checkbox_size();
+        size.x += checkbox_size.x + spacing_scale * get_theme().window_height;
+        size.y = std::max(size.y, checkbox_size.y);
+        return size;
+    }
+
+    mgl::vec2f CheckBox::get_checkbox_size() {
+        const mgl::vec2f text_bounds = text.get_bounds().size;
+        return mgl::vec2f(text_bounds.y, text_bounds.y).floor();
+    }
+}