Initial commit

include/liblvgl/core/lv_theme.h

@@ -0,0 +1,120 @@
+/**
+ *@file lv_theme.h
+ *
+ */
+
+#ifndef LV_THEME_H
+#define LV_THEME_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*********************
+ *    INCLUDES
+ *********************/
+#include "liblvgl/core/lv_obj.h"
+
+/*********************
+ *    DEFINES
+ *********************/
+
+/**********************
+ *    TYPEDEFS
+ **********************/
+
+struct _lv_theme_t;
+struct _lv_disp_t;
+
+typedef void (*lv_theme_apply_cb_t)(struct _lv_theme_t *, lv_obj_t *);
+
+typedef struct _lv_theme_t {
+    lv_theme_apply_cb_t apply_cb;
+    struct _lv_theme_t * parent;    /**< Apply the current theme's style on top of this theme.*/
+    void * user_data;
+    struct _lv_disp_t * disp;
+    lv_color_t color_primary;
+    lv_color_t color_secondary;
+    const lv_font_t * font_small;
+    const lv_font_t * font_normal;
+    const lv_font_t * font_large;
+    uint32_t flags;                 /*Any custom flag used by the theme*/
+} lv_theme_t;
+
+/**********************
+ *  GLOBAL PROTOTYPES
+ **********************/
+
+/**
+ * Get the theme assigned to the display of the object
+ * @param obj       pointer to a theme object
+ * @return          the theme of the object's display (can be NULL)
+ */
+lv_theme_t  * lv_theme_get_from_obj(lv_obj_t * obj);
+
+/**
+ * Apply the active theme on an object
+ * @param obj pointer to an object
+ */
+void lv_theme_apply(lv_obj_t * obj);
+
+/**
+ * Set a base theme for a theme.
+ * The styles from the base them will be added before the styles of the current theme.
+ * Arbitrary long chain of themes can be created by setting base themes.
+ * @param new_theme pointer to theme which base should be set
+ * @param parent pointer to the base theme
+ */
+void lv_theme_set_parent(lv_theme_t * new_theme, lv_theme_t * parent);
+
+/**
+ * Set an apply callback for a theme.
+ * The apply callback is used to add styles to different objects
+ * @param theme pointer to theme which callback should be set
+ * @param apply_cb pointer to the callback
+ */
+void lv_theme_set_apply_cb(lv_theme_t * theme, lv_theme_apply_cb_t apply_cb);
+
+/**
+ * Get the small font of the theme
+ * @param obj pointer to an object
+ * @return pointer to the font
+ */
+const lv_font_t * lv_theme_get_font_small(lv_obj_t * obj);
+/**
+ * Get the normal font of the theme
+ * @param obj pointer to an object
+ * @return pointer to the font
+ */
+const lv_font_t * lv_theme_get_font_normal(lv_obj_t * obj);
+
+/**
+ * Get the subtitle font of the theme
+ * @param obj pointer to an object
+ * @return pointer to the font
+ */
+const lv_font_t * lv_theme_get_font_large(lv_obj_t * obj);
+
+/**
+ * Get the primary color of the theme
+ * @param obj pointer to an object
+ * @return the color
+ */
+lv_color_t lv_theme_get_color_primary(lv_obj_t * obj);
+
+/**
+ * Get the secondary color of the theme
+ * @param obj pointer to an object
+ * @return the color
+ */
+lv_color_t lv_theme_get_color_secondary(lv_obj_t * obj);
+
+/**********************
+ *    MACROS
+ **********************/
+
+#ifdef __cplusplus
+} /*extern "C"*/
+#endif
+
+#endif /*LV_THEME_H*/