feat(ui): add Slider widget for value selection

include/Cubed/ui/slider.hpp

@@ -0,0 +1,47 @@
+#pragma once
+
+#include "Cubed/ui/image.hpp"
+#include "Cubed/ui/widget.hpp"
+
+namespace Cubed {
+class Slider : public Widget {
+public:
+    Slider(Widget* parent);
+
+    Slider& set_slider(float* value, const float& min, const float& max);
+
+    Image& set_track();
+
+    Image& set_thumb();
+
+    float width() const override;
+    float height() const override;
+
+    Slider& set_scale(float scale);
+
+    Slider& set_width(float width);
+    Slider& set_height(float h);
+
+    bool handle_mouse_move_event(const MouseMoveEvent& e) override;
+    bool handle_mouse_button_event(const MouseButtonEvent& e) override;
+
+private:
+    void update_value(float mouse_x);
+
+    void on_update(float) override;
+
+    void on_render(Renderer& renderer) override;
+
+    std::unique_ptr<Image> m_track;
+    std::unique_ptr<Image> m_thumb;
+    float m_scale = 1.0f;
+    float m_width = 0.0f;
+    float m_height = 0.0f;
+    float m_xpos = 0.0f;
+    bool m_dragging = false;
+    bool m_inside = false;
+    float* m_value = nullptr;
+    float m_min = 0;
+    float m_max = 0;
+};
+} // namespace Cubed

src/CMakeLists.txt

@@ -73,4 +73,5 @@ target_sources(${PROJECT_NAME}
         ui/pause_menu_ui_manager.cpp
         scene/credits_scene.cpp
         ui/credits_ui.cpp
+        ui/slider.cpp
 )

src/ui/button.cpp

@@ -30,11 +30,7 @@ bool Button::handle_mouse_move_event(const MouseMoveEvent& e) {
     }
     m_hovered = false;
 
-    if (Widget::handle_mouse_move_event(e)) {
-        return true;
-    }
-
-    return false;
+    return Widget::handle_mouse_move_event(e);
 }
 bool Button::handle_mouse_button_event(const MouseButtonEvent& e) {
     if (e.action == KeyAction::PRESS && e.key == MouseKey::LEFT_BUTTON) {
@@ -45,11 +41,7 @@ bool Button::handle_mouse_button_event(const MouseButtonEvent& e) {
         }
     }
 
-    if (Widget::handle_mouse_button_event(e)) {
-        return true;
-    }
-
-    return false;
+    return Widget::handle_mouse_button_event(e);
 }
 
 Button& Button::set_scale(float scale) {

src/ui/slider.cpp

@@ -0,0 +1,135 @@
+#include "Cubed/ui/slider.hpp"
+
+#include "Cubed/tools/cubed_assert.hpp"
+#include "Cubed/tools/log.hpp"
+
+#include <algorithm>
+namespace Cubed {
+
+Slider::Slider(Widget* parent) : Widget(parent) {}
+
+Slider& Slider::set_slider(float* value, const float& min, const float& max) {
+    m_value = value;
+    m_min = min;
+    m_max = max;
+    return *this;
+}
+
+Image& Slider::set_track() {
+    m_track = std::make_unique<Image>(this);
+    m_track->set_fill(true);
+    m_track->set_anchor(Anchor::TOP_LEFT);
+    return *m_track;
+}
+
+Image& Slider::set_thumb() {
+    m_thumb = std::make_unique<Image>(this);
+    m_thumb->set_height(height());
+    m_thumb->set_width(10.0f);
+    m_thumb->set_anchor(Anchor::TOP_LEFT);
+    m_thumb->set_scale(m_scale);
+    return *m_thumb;
+}
+
+float Slider::width() const { return m_width * m_scale; }
+float Slider::height() const { return m_height * m_scale; }
+
+Slider& Slider::set_scale(float scale) {
+    m_scale = scale;
+    m_track->set_width(width()).set_height(height());
+    m_thumb->set_height(height());
+    return *this;
+}
+
+Slider& Slider::set_width(float width) {
+    if (!m_thumb || width < m_thumb->width()) {
+        return *this;
+    }
+    m_width = width;
+    return *this;
+}
+
+Slider& Slider::set_height(float h) {
+    m_height = h;
+    if (m_thumb) {
+        m_thumb->set_height(height());
+    }
+    return *this;
+}
+
+bool Slider::handle_mouse_move_event(const MouseMoveEvent& e) {
+    auto p = pos();
+    m_xpos = e.xpos;
+    if (e.xpos >= p.x && e.xpos <= p.x + width() && e.ypos >= p.y &&
+        e.ypos <= p.y + height()) {
+        m_inside = true;
+    } else {
+        m_inside = false;
+    }
+    if (m_dragging && m_value) {
+        update_value(e.xpos);
+        return true;
+    }
+    return Widget::handle_mouse_move_event(e);
+}
+bool Slider::handle_mouse_button_event(const MouseButtonEvent& e) {
+    if (e.action == KeyAction::PRESS && e.key == MouseKey::LEFT_BUTTON) {
+        if (m_inside) {
+            m_dragging = true;
+            update_value(m_xpos);
+            return true;
+        }
+    }
+
+    if (e.action == KeyAction::RELEASE && e.key == MouseKey::LEFT_BUTTON) {
+        if (m_dragging) {
+            m_dragging = false;
+            return true;
+        }
+    }
+
+    return Widget::handle_mouse_button_event(e);
+}
+
+void Slider::update_value(float mouse_x) {
+    if (width() <= 0.0f) {
+        Logger::info("Slider Width is less then 0");
+        return;
+    }
+    float t = std::clamp((mouse_x - pos().x) / width(), 0.0f, 1.0f);
+
+    *m_value = m_min + t * (m_max - m_min);
+}
+
+void Slider::on_update(float) {
+    if (!m_value || !m_thumb || !m_track) {
+        Logger::error("Please Set value and thumb and track");
+        ASSERT(false);
+        return;
+    }
+    float range = m_max - m_min;
+    if (range <= 0.0f) {
+        Logger::error("Range {} is <= 0.0f", range);
+        ASSERT(false);
+        return;
+    }
+
+    float t = (*m_value - m_min) / range;
+
+    t = std::clamp(t, 0.0f, 1.0f);
+
+    float offset = t * (width() - m_thumb->width());
+
+    m_thumb->set_offset({offset, 0});
+}
+
+void Slider::on_render(Renderer& renderer) {
+    if (m_track) {
+        m_track->render(renderer);
+    }
+    if (m_thumb) {
+        m_thumb->render(renderer);
+    }
+}
+
+} // namespace Cubed