style animation added

lv_examples/1_5_animations/animations.c

+/*
+ *
+    static lv_style_t s1;
+    lv_style_get(LV_STYLE_BTN_REL, &s1);
+
+    static lv_style_t s2;
+    lv_style_get(LV_STYLE_BTN_REL, &s2);
+    s2.radius = 30;
+    s2.mcolor = COLOR_RED;
+    s2.bwidth = 8;
+    s2.opa = 50;
+    s2.hpad = 80;
+    //s2.font = font_get(FONT_DEJAVU_60);
+
+
+    lv_style_anim_t a;
+    a.act_time = -1000;
+    a.time = 1000;
+    a.playback = 1;
+    a.playback_pause = 300;
+    a.repeat = 1;
+    a.repeat_pause = 300;
+    a.end_cb = NULL;
+    a.style_anim = lv_style_get(LV_STYLE_BTN_REL, NULL);
+    a.style_start = &s1;
+    a.style_end = &s2;
+    lv_style_anim_create(&a);
+ */

lv_obj/lv_obj.c

@@ -1508,9 +1508,7 @@ static void lv_style_refr_core(void * style_p, lv_obj_t * obj)
     lv_obj_t * i;
     LL_READ(obj->child_ll, i) {
         if(i->style_p == style_p || style_p == NULL) {
-            lv_obj_inv(i);
-            i->signal_f(i, LV_SIGNAL_STYLE_CHG, NULL);
-            lv_obj_inv(i);
+            lv_child_refr_style(i);
         }
         
         lv_style_refr_core(style_p, i);

lv_obj/lv_style.c

@@ -8,18 +8,31 @@
  *********************/
 #include "lv_conf.h"
 #include "lv_style.h"
+#include "lv_obj.h"
+#include "misc/mem/dyn_mem.h"
 
 /*********************
  *      DEFINES
  *********************/
+#define LV_STYLE_ANIM_RES       255    /*Animation max in 1024 steps*/
+#define LV_STYLE_ANIM_SHIFT     8      /*log2(LV_STYLE_ANIM_RES)*/
+
+#define VAL_PROP(v1, v2, r)   v1 + (((v2-v1) * r) >> LV_STYLE_ANIM_SHIFT)
+#define STYLE_ATTR_ANIM(attr, r)   if(start->attr != end->attr) act->attr = VAL_PROP(start->attr, end->attr, r)
 
 /**********************
  *      TYPEDEFS
  **********************/
+typedef struct {
+    const lv_style_t * style_start;
+    const lv_style_t * style_end;
+    lv_style_t * style_anim;
+}lv_style_anim_dsc_t;
 
 /**********************
  *  STATIC PROTOTYPES
  **********************/
+static void lv_style_aimator(lv_style_anim_dsc_t * dsc, int32_t val);
 
 /**********************
  *  STATIC VARIABLES
@@ -229,6 +242,84 @@ void lv_style_cpy(lv_style_t * dest, const lv_style_t * src)
     memcpy(dest, src, sizeof(lv_style_t));
 }
 
+/**
+ * Create an animation from a pre-configured 'lv_style_anim_t' variable
+ * @param anim pointer to a pre-configured 'lv_style_anim_t' variable (will be copied)
+ */
+void lv_style_anim_create(lv_style_anim_t * anim)
+{
+    lv_style_anim_dsc_t * dsc;
+    dsc = dm_alloc(sizeof(lv_style_anim_dsc_t));
+    dsc->style_anim = anim->style_anim;
+    dsc->style_start = anim->style_start;
+    dsc->style_end = anim->style_end;
+
+    anim_t a;
+    a.var = (void*)dsc;
+    a.start = 0;
+    a.end = LV_STYLE_ANIM_RES;
+    a.fp = (anim_fp_t)lv_style_aimator;
+    a.path = anim_get_path(ANIM_PATH_LIN);
+    a.end_cb = anim->end_cb;
+    a.act_time = anim->act_time;
+    a.time = anim->time;
+    a.playback = anim->playback;
+    a.playback_pause = anim->playback_pause;
+    a.repeat = anim->repeat;
+    a.repeat_pause = anim->repeat_pause;
+
+    anim_create(&a);
+}
+
 /**********************
  *   STATIC FUNCTIONS
  **********************/
+
+/**
+ * Used by the style animations to set the values of a style according to start and end style.
+ * @param dsc the 'animated variable' set by lv_style_anim_create()
+ * @param val the current state of the animation between 0 and LV_STYLE_ANIM_RES
+ */
+static void lv_style_aimator(lv_style_anim_dsc_t * dsc, int32_t val)
+{
+    const lv_style_t * start = dsc->style_start;
+    const lv_style_t * end = dsc->style_end;
+    lv_style_t * act = dsc->style_anim;
+
+    STYLE_ATTR_ANIM(opa, val);
+    STYLE_ATTR_ANIM(radius, val);
+    STYLE_ATTR_ANIM(bwidth, val);
+    STYLE_ATTR_ANIM(swidth, val);
+    STYLE_ATTR_ANIM(hpad, val);
+    STYLE_ATTR_ANIM(vpad, val);
+    STYLE_ATTR_ANIM(opad, val);
+    STYLE_ATTR_ANIM(line_space, val);
+    STYLE_ATTR_ANIM(letter_space, val);
+    STYLE_ATTR_ANIM(line_width, val);
+    STYLE_ATTR_ANIM(img_recolor, val);
+
+    act->mcolor = color_mix(end->mcolor, start->mcolor, val);
+    act->gcolor = color_mix(end->gcolor, start->gcolor, val);
+    act->bcolor = color_mix(end->bcolor, start->bcolor, val);
+    act->scolor = color_mix(end->scolor, start->scolor, val);
+    act->ccolor = color_mix(end->ccolor, start->ccolor, val);
+
+
+    if(val == 0) {
+        act->empty = start->empty;
+        act->glass = start->glass;
+        act->font = start->font;
+        act->stype = start->stype;
+        act->txt_align = start->txt_align;
+    }
+
+    if(val == LV_STYLE_ANIM_RES) {
+        act->empty = end->empty;
+        act->glass = end->glass;
+        act->font = end->font;
+        act->stype = end->stype;
+        act->txt_align = end->txt_align;
+    }
+
+    lv_style_refr_objs(dsc->style_anim);
+}

lv_obj/lv_style.h

@@ -17,6 +17,7 @@ extern "C" {
 #include "misc/gfx/color.h"
 #include "misc/gfx/area.h"
 #include "misc/gfx/font.h"
+#include "misc/gfx/anim.h"
 
 /*********************
  *      DEFINES
@@ -83,6 +84,34 @@ typedef enum {
 }lv_style_name_t;
 
 
+typedef struct {
+    const lv_style_t * style_start; /*Pointer to the starting style*/
+    const lv_style_t * style_end;   /*Pointer to the destination style*/
+    lv_style_t * style_anim;        /*Pointer to a style to animate*/
+    anim_cb_t end_cb;               /*Call it when the animation is ready*/
+    int16_t time;                   /*Animation time in ms*/
+    int16_t act_time;               /*Current time in animation. Set to negative to make delay.*/
+    uint16_t playback_pause;        /*Wait before play back*/
+    uint16_t repeat_pause;          /*Wait before repeat*/
+    uint8_t playback :1;            /*When the animation is ready play it back*/
+    uint8_t repeat :1;              /*Repeat the animation infinitely*/
+}lv_style_anim_t;
+
+/* Example initialization
+lv_style_anim_t a;
+a.style_anim = &style_to_anim;
+a.style_start = &style_1;
+a.style_end = &style_2;
+a.act_time = 0;
+a.time = 1000;
+a.playback = 0;
+a.playback_pause = 0;
+a.repeat = 0;
+a.repeat_pause = 0;
+a.end_cb = NULL;
+lv_style_anim_create(&a);
+ */
+
 /**********************
  * GLOBAL PROTOTYPES
  **********************/
@@ -99,8 +128,22 @@ void lv_style_init (void);
  */
 lv_style_t * lv_style_get(lv_style_name_t style_name, lv_style_t * copy);
 
+
+/**
+ * Copy a style to an other
+ * @param dest pointer to the destination style
+ * @param src pointer to the source style
+ */
 void lv_style_cpy(lv_style_t * dest, const lv_style_t * src);
 
+void lv_style_anim_create(lv_style_anim_t * anim);
+
+/**
+ * Used by the style animations to set the values of a style according to start and end style.
+ * @param dsc the 'animated variable' set by lv_style_anim_create()
+ * @param val the current state of the animation between 0 and LV_STYLE_ANIM_RES
+ */
+static void lv_style_aimator(void * dsc, int32_t val);
 
 /**********************
  *      MACROS