combine with desktop project

Signed-off-by: Peter Siegmund <developer@mars3142.org>

src/ui/widgets/Button.cpp

@@ -0,0 +1,32 @@
+#include "ui/widgets/Button.h"
+
+#include <functional>
+#include <utility>
+#include <SDL3_image/SDL_image.h>
+#include "ResourceManager.h"
+
+auto pressed = false;
+
+Button::Button(
+    void* appState,
+    const float x,
+    const float y,
+    const float width,
+    std::function<void()> callback)
+    : UIWidget(appState)
+    , m_x(x)
+    , m_y(y)
+    , m_width(width)
+    , m_callback(std::move(callback)) {
+}
+
+void Button::render() const {
+    const auto button = ResourceManager::getInstance().get_texture(get_context()->renderer(), "assets/button_normal.png");
+    const auto overlay =ResourceManager::getInstance().get_texture(get_context()->renderer(), "assets/button_pressed_overlay.png");
+
+    const auto dst = SDL_FRect(m_x, m_y, m_width, m_width);
+    SDL_RenderTexture(get_context()->renderer(), button, nullptr, &dst);
+    if(pressed) {
+        SDL_RenderTexture(get_context()->renderer(), overlay, nullptr, &dst);
+    }
+}