Add theme class

1 files changed, 37 insertions, 0 deletions

diff --git a/src/ui/themes.cpp b/src/ui/themes.cpp
new file mode 100644
index 00000000..6ae59365
--- /dev/null
+++ b/src/ui/themes.cpp
@@ -0,0 +1,37 @@
+#include "themes.hpp"
+
+namespace ui {
+namespace themes {
+
+static void theme_apply_cb(lv_theme_t* th, lv_obj_t* obj) {
+  reinterpret_cast<Theme*>(th->user_data)->Callback(obj);
+}
+
+Theme::Theme() {
+  /*Initialize the styles*/
+  lv_style_init(&button_style_);
+  lv_style_set_bg_color(&button_style_, lv_palette_main(LV_PALETTE_GREEN));
+  lv_style_set_border_color(&button_style_,
+                            lv_palette_darken(LV_PALETTE_GREEN, 3));
+  lv_style_set_border_width(&button_style_, 1);
+
+  lv_theme_t* parent_theme = lv_disp_get_theme(NULL);
+  theme_ = *parent_theme;
+  theme_.user_data = this;
+
+  /*Set the parent theme and the style apply callback for the new theme*/
+  lv_theme_set_parent(&theme_, parent_theme);
+  lv_theme_set_apply_cb(&theme_, theme_apply_cb);
+}
+
+void Theme::Apply(void) {
+  lv_disp_set_theme(NULL, &theme_);
+}
+
+void Theme::Callback(lv_obj_t* obj) {
+  if (lv_obj_check_type(obj, &lv_btn_class) || lv_obj_check_type(obj, &lv_list_btn_class)) {
+    lv_obj_add_style(obj, &button_style_, 0);
+  }
+}
+}  // namespace themes
+}  // namespace ui
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