feat(bar): reverse drawing direction of lv_bar if min > max (#4654)

Signed-off-by: wangxuedong <wangxuedong@xiaomi.com>

docs/widgets/bar.rst

@@ -33,7 +33,9 @@ A new value can be set by
 ``lv_bar_set_value(bar, new_value, LV_ANIM_ON/OFF)``. The value is
 interpreted in a range (minimum and maximum values) which can be
 modified with :cpp:expr:`lv_bar_set_range(bar, min, max)`. The default range is
-0..100.
+0..100, and the default drawing direction is from left to right in horizontal mode and
+bottom to top in vertical mode. If the minimum value is greater than the maximum value, like
+100..0, the drawing direction changes to the opposite direction.
 
 The new value in :cpp:func:`lv_bar_set_value` can be set with or without an
 animation depending on the last parameter (``LV_ANIM_ON/OFF``).

docs/widgets/slider.rst

@@ -35,6 +35,9 @@ To set an initial value use :cpp:expr:`lv_slider_set_value(slider, new_value, LV
 animation time is set by the styles' ``anim_time`` property.
 
 To specify the range (min, max values), :cpp:expr:`lv_slider_set_range(slider, min , max)` can be used.
+The default range is 0..100, and the default drawing direction is from left to right in horizontal mode and
+bottom to top in vertical mode. If the minimum value is greater than the maximum value, like
+100..0, the drawing direction changes to the opposite direction.
 
 Modes
 -----

examples/widgets/bar/index.rst

@@ -34,3 +34,9 @@ Custom drawer to show the current value
 .. lv_example:: widgets/bar/lv_example_bar_6
   :language: c
 
+Bar with opposite direction
+---------------------------
+
+.. lv_example:: widgets/bar/lv_example_bar_7
+  :language: c
+

examples/widgets/bar/lv_example_bar_7.c

@@ -0,0 +1,23 @@
+#include "../../lv_examples.h"
+#if LV_USE_BAR && LV_BUILD_EXAMPLES
+
+/**
+ * Bar with opposite direction
+ */
+void lv_example_bar_7(void)
+{
+    lv_obj_t * label;
+
+
+    lv_obj_t * bar_tob = lv_bar_create(lv_scr_act());
+    lv_obj_set_size(bar_tob, 20, 200);
+    lv_bar_set_range(bar_tob, 100, 0);
+    lv_bar_set_value(bar_tob, 70, LV_ANIM_OFF);
+    lv_obj_align(bar_tob, LV_ALIGN_CENTER, 0, -30);
+
+    label = lv_label_create(lv_scr_act());
+    lv_label_set_text(label, "From top to bottom");
+    lv_obj_align_to(label, bar_tob, LV_ALIGN_OUT_TOP_MID, 0, -5);
+}
+
+#endif

examples/widgets/bar/lv_example_bar_7.py

@@ -0,0 +1 @@
+pass

examples/widgets/lv_example_widgets.h

@@ -36,6 +36,7 @@ void lv_example_bar_3(void);
 void lv_example_bar_4(void);
 void lv_example_bar_5(void);
 void lv_example_bar_6(void);
+void lv_example_bar_7(void);
 
 void lv_example_button_1(void);
 void lv_example_button_2(void);
@@ -118,6 +119,7 @@ void lv_example_scale_5(void);
 void lv_example_slider_1(void);
 void lv_example_slider_2(void);
 void lv_example_slider_3(void);
+void lv_example_slider_4(void);
 
 void lv_example_span_1(void);
 

examples/widgets/slider/index.rst

@@ -17,4 +17,8 @@ Slider with extended drawer
 .. lv_example:: widgets/slider/lv_example_slider_3
   :language: c
 
+Slider with opposite direction
+------------------------------
 
+.. lv_example:: widgets/slider/lv_example_slider_4
+  :language: c

examples/widgets/slider/lv_example_slider_4.c

@@ -0,0 +1,34 @@
+#include "../../lv_examples.h"
+#if LV_USE_SLIDER && LV_BUILD_EXAMPLES
+
+static void slider_event_cb(lv_event_t * e);
+static lv_obj_t * slider_label;
+
+/**
+ * Slider with opposite direction
+ */
+void lv_example_slider_4(void)
+{
+    /*Create a slider in the center of the display*/
+    lv_obj_t * slider = lv_slider_create(lv_scr_act());
+    lv_obj_center(slider);
+    lv_obj_add_event(slider, slider_event_cb, LV_EVENT_VALUE_CHANGED, NULL);
+    /*Reverse the direction of the slider*/
+    lv_slider_set_range(slider, 100, 0);
+    /*Create a label below the slider*/
+    slider_label = lv_label_create(lv_scr_act());
+    lv_label_set_text(slider_label, "0%");
+
+    lv_obj_align_to(slider_label, slider, LV_ALIGN_OUT_BOTTOM_MID, 0, 10);
+}
+
+static void slider_event_cb(lv_event_t * e)
+{
+    lv_obj_t * slider = lv_event_get_target(e);
+    char buf[8];
+    lv_snprintf(buf, sizeof(buf), "%d%%", (int)lv_slider_get_value(slider));
+    lv_label_set_text(slider_label, buf);
+    lv_obj_align_to(slider_label, slider, LV_ALIGN_OUT_BOTTOM_MID, 0, 10);
+}
+
+#endif

examples/widgets/slider/lv_example_slider_4.py

@@ -0,0 +1,21 @@
+#
+# Slider with opposite direction
+#
+def slider_event_cb(e):
+
+    slider = e.get_target_obj()
+    slider_label.set_text("{:d}%".format(slider.get_value()))
+    slider_label.align_to(slider, lv.ALIGN.OUT_BOTTOM_MID, 0, 10)
+
+# Create a slider in the center of the display
+slider = lv.slider(lv.screen_active())
+slider.center()
+slider.add_event(slider_event_cb, lv.EVENT.VALUE_CHANGED, None)
+slider.set_range(100, 0)
+
+# Create a label below the slider
+slider_label = lv.label(lv.screen_active())
+slider_label.set_text("0%")
+
+slider_label.align_to(slider, lv.ALIGN.OUT_BOTTOM_MID, 0, 10)
+

src/widgets/bar/lv_bar.c

@@ -99,6 +99,7 @@ void lv_bar_set_value(lv_obj_t * obj, int32_t value, lv_anim_enable_t anim)
     value = value < bar->start_value ? bar->start_value : value; /*Can't be smaller than the left value*/
 
     if(bar->cur_value == value) return;
+
     lv_bar_set_value_with_anim(obj, value, &bar->cur_value, &bar->cur_value_anim, anim);
 }
 
@@ -116,6 +117,7 @@ void lv_bar_set_start_value(lv_obj_t * obj, int32_t value, lv_anim_enable_t anim
     value = value > bar->cur_value ? bar->cur_value : value; /*Can't be greater than the right value*/
 
     if(bar->start_value == value) return;
+
     lv_bar_set_value_with_anim(obj, value, &bar->start_value, &bar->start_value_anim, anim);
 }
 
@@ -125,27 +127,27 @@ void lv_bar_set_range(lv_obj_t * obj, int32_t min, int32_t max)
 
     lv_bar_t * bar = (lv_bar_t *)obj;
 
-    if(max < min) {
-        LV_LOG_WARN("error range: min = %" LV_PRId32 ", max = %" LV_PRId32, min, max);
-        return;
-    }
+    bar->val_reversed = min > max;
 
-    if(bar->min_value == min && bar->max_value == max) return;
+    int32_t real_min = bar->val_reversed ? max : min;
+    int32_t real_max = bar->val_reversed ? min : max;
+    if(bar->min_value == real_min && bar->max_value == real_max) return;
 
-    bar->max_value = max;
-    bar->min_value = min;
+    bar->max_value = real_max;
+    bar->min_value = real_min;
 
     if(lv_bar_get_mode(obj) != LV_BAR_MODE_RANGE)
-        bar->start_value = min;
+        bar->start_value = real_min;
 
-    if(bar->cur_value > max) {
-        bar->cur_value = max;
+    if(bar->cur_value > real_max) {
+        bar->cur_value = real_max;
         lv_bar_set_value(obj, bar->cur_value, LV_ANIM_OFF);
     }
-    if(bar->cur_value < min) {
-        bar->cur_value = min;
+    if(bar->cur_value < real_min) {
+        bar->cur_value = real_min;
         lv_bar_set_value(obj, bar->cur_value, LV_ANIM_OFF);
     }
+
     lv_obj_invalidate(obj);
 }
 
@@ -188,7 +190,7 @@ int32_t lv_bar_get_min_value(const lv_obj_t * obj)
 {
     LV_ASSERT_OBJ(obj, MY_CLASS);
     lv_bar_t * bar = (lv_bar_t *)obj;
-    return bar->min_value;
+    return bar->val_reversed ? bar->max_value : bar->min_value;
 }
 
 int32_t lv_bar_get_max_value(const lv_obj_t * obj)
@@ -196,7 +198,7 @@ int32_t lv_bar_get_max_value(const lv_obj_t * obj)
     LV_ASSERT_OBJ(obj, MY_CLASS);
     lv_bar_t * bar = (lv_bar_t *)obj;
 
-    return bar->max_value;
+    return bar->val_reversed ? bar->min_value : bar->max_value;
 }
 
 lv_bar_mode_t lv_bar_get_mode(lv_obj_t * obj)
@@ -207,6 +209,15 @@ lv_bar_mode_t lv_bar_get_mode(lv_obj_t * obj)
     return bar->mode;
 }
 
+bool lv_bar_is_symmetrical(lv_obj_t * obj)
+{
+    LV_ASSERT_OBJ(obj, MY_CLASS);
+    lv_bar_t * bar = (lv_bar_t *)obj;
+
+    return  bar->mode == LV_BAR_MODE_SYMMETRICAL && bar->min_value < 0 && bar->max_value > 0 &&
+            bar->start_value == bar->min_value;
+}
+
 /**********************
  *   STATIC FUNCTIONS
  **********************/
@@ -226,6 +237,7 @@ static void lv_bar_constructor(const lv_obj_class_t * class_p, lv_obj_t * obj)
     bar->indic_area.y1 = 0;
     bar->indic_area.y2 = 0;
     bar->mode = LV_BAR_MODE_NORMAL;
+    bar->val_reversed = false;
 
     lv_bar_init_anim(obj, &bar->cur_value_anim);
     lv_bar_init_anim(obj, &bar->start_value_anim);
@@ -269,9 +281,7 @@ static void draw_indic(lv_event_t * e)
     }
 
     bool hor = barw >= barh;
-    bool sym = false;
-    if(bar->mode == LV_BAR_MODE_SYMMETRICAL && bar->min_value < 0 && bar->max_value > 0 &&
-       bar->start_value == bar->min_value) sym = true;
+    bool sym = lv_bar_is_symmetrical(obj);
 
     /*Calculate the indicator area*/
     lv_coord_t bg_left = lv_obj_get_style_pad_left(obj,     LV_PART_MAIN);
@@ -345,8 +355,15 @@ static void draw_indic(lv_event_t * e)
         anim_cur_value_x = (int32_t)((int32_t)anim_length * (bar->cur_value - bar->min_value)) / range;
     }
 
+    /**
+     * The drawing drection of the bar can be reversed only when one of the two conditions(value inversion
+     * or horizontal direction base dir is LV_BASE_DIR_RTL) is met.
+    */
     lv_base_dir_t base_dir = lv_obj_get_style_base_dir(obj, LV_PART_MAIN);
-    if(base_dir == LV_BASE_DIR_RTL) {
+    bool hor_need_reversed = hor && base_dir == LV_BASE_DIR_RTL;
+    bool reversed = bar->val_reversed ^ hor_need_reversed;
+
+    if(reversed) {
         /*Swap axes*/
         lv_coord_t * tmp;
         tmp = axis1;
@@ -365,31 +382,43 @@ static void draw_indic(lv_event_t * e)
         *axis1 = *axis2 - anim_cur_value_x + 1;
         *axis2 -= anim_start_value_x;
     }
+
     if(sym) {
         lv_coord_t zero, shift;
         shift = (-bar->min_value * anim_length) / range;
+
         if(hor) {
+            lv_coord_t * left = reversed ? axis2 : axis1;
+            lv_coord_t * right = reversed ? axis1 : axis2;
+            if(reversed)
+                zero = *axis1 - shift + 1;
+            else
                 zero = *axis1 + shift;
-            if(*axis2 > zero)
-                *axis1 = zero;
+
+            if(*axis2 > zero) {
+                *right = *axis2;
+                *left = zero;
+            }
             else {
-                *axis1 = *axis2;
-                *axis2 = zero;
+                *left = *axis2;
+                *right = zero;
             }
         }
         else {
+            lv_coord_t * top = reversed ? axis2 : axis1;
+            lv_coord_t * bottom = reversed ? axis1 : axis2;
+            if(reversed)
+                zero = *axis2 + shift;
+            else
                 zero = *axis2 - shift + 1;
-            if(*axis1 > zero)
-                *axis2 = zero;
-            else {
-                *axis2 = *axis1;
-                *axis1 = zero;
+
+            if(*axis1 > zero) {
+                *bottom = *axis1;
+                *top = zero;
             }
-            if(*axis2 < *axis1) {
-                /*swap*/
-                zero = *axis1;
-                *axis1 = *axis2;
-                *axis2 = zero;
+            else {
+                *top = *axis1;
+                *bottom = zero;
             }
         }
     }

src/widgets/bar/lv_bar.h

@@ -55,6 +55,7 @@ typedef struct {
     int32_t max_value;          /**< Maximum value of the bar*/
     int32_t start_value;        /**< Start value of the bar*/
     lv_area_t indic_area;       /**< Save the indicator area. Might be used by derived types*/
+    bool val_reversed;          /**< Whether value been reversed */
     _lv_bar_anim_t cur_value_anim;
     _lv_bar_anim_t start_value_anim;
     lv_bar_mode_t mode : 2;     /**< Type of bar*/
@@ -99,6 +100,7 @@ void lv_bar_set_start_value(lv_obj_t * obj, int32_t start_value, lv_anim_enable_
  * @param obj       pointer to the bar object
  * @param min       minimum value
  * @param max       maximum value
+ * @note If min is greater than max, the drawing direction becomes to the oppsite direction.
  */
 void lv_bar_set_range(lv_obj_t * obj, int32_t min, int32_t max);
 
@@ -148,6 +150,13 @@ int32_t lv_bar_get_max_value(const lv_obj_t * obj);
  */
 lv_bar_mode_t lv_bar_get_mode(lv_obj_t * obj);
 
+/**
+ * Give the bar is in symmetrical mode or not
+ * @param obj       pointer to bar object
+ * @return          true: in symmetrical mode false : not in
+*/
+bool lv_bar_is_symmetrical(lv_obj_t * obj);
+
 /**********************
  *      MACROS
  **********************/

src/widgets/slider/lv_slider.c

@@ -24,7 +24,8 @@
  *********************/
 #define MY_CLASS &lv_slider_class
 
-#define LV_SLIDER_KNOB_COORD(is_rtl, area) (is_rtl ? area.x1 : area.x2)
+#define LV_SLIDER_KNOB_COORD(is_reversed, area) (is_reversed ? area.x1 : area.x2)
+#define LV_SLIDER_KNOB_COORD_VERTICAL(is_reversed, area) (is_reversed ? area.y2 : area.y1)
 
 /**********************
  *      TYPEDEFS
@@ -238,24 +239,24 @@ static void draw_knob(lv_event_t * e)
 
     const bool is_rtl = LV_BASE_DIR_RTL == lv_obj_get_style_base_dir(obj, LV_PART_MAIN);
     const bool is_horizontal = is_slider_horizontal(obj);
+    const bool is_reversed = slider->bar.val_reversed ^ (is_rtl && is_horizontal);
 
     lv_area_t knob_area;
     lv_coord_t knob_size;
-    bool is_symmetrical = false;
-    if(slider->bar.mode == LV_BAR_MODE_SYMMETRICAL && slider->bar.min_value < 0 &&
-       slider->bar.max_value > 0) is_symmetrical = true;
+    bool is_symmetrical = lv_slider_is_symmetrical(obj);
 
     if(is_horizontal) {
         knob_size = lv_obj_get_height(obj);
-        if(is_symmetrical && slider->bar.cur_value < 0) knob_area.x1 = slider->bar.indic_area.x1;
-        else knob_area.x1 = LV_SLIDER_KNOB_COORD(is_rtl, slider->bar.indic_area);
+        if(is_symmetrical &&
+           slider->bar.cur_value < 0) knob_area.x1 = LV_SLIDER_KNOB_COORD(!is_reversed, slider->bar.indic_area);
+        else knob_area.x1 = LV_SLIDER_KNOB_COORD(is_reversed, slider->bar.indic_area);
     }
     else {
         knob_size = lv_obj_get_width(obj);
-        if(is_symmetrical && slider->bar.cur_value < 0) knob_area.y1 = slider->bar.indic_area.y2;
-        else knob_area.y1 = slider->bar.indic_area.y1;
+        if(is_symmetrical &&
+           slider->bar.cur_value < 0) knob_area.y1 =  LV_SLIDER_KNOB_COORD_VERTICAL(!is_reversed, slider->bar.indic_area);
+        else knob_area.y1 = LV_SLIDER_KNOB_COORD_VERTICAL(is_reversed, slider->bar.indic_area);
     }
-
     lv_draw_rect_dsc_t knob_rect_dsc;
     lv_draw_rect_dsc_init(&knob_rect_dsc);
     lv_obj_init_draw_rect_dsc(obj, LV_PART_KNOB, &knob_rect_dsc);
@@ -276,11 +277,11 @@ static void draw_knob(lv_event_t * e)
 
         /*Calculate the second knob area*/
         if(is_horizontal) {
-            /*use !is_rtl to get the other knob*/
-            knob_area.x1 = LV_SLIDER_KNOB_COORD(!is_rtl, slider->bar.indic_area);
+            /*use !is_reversed to get the other knob*/
+            knob_area.x1 = LV_SLIDER_KNOB_COORD(!is_reversed, slider->bar.indic_area);
         }
         else {
-            knob_area.y1 = slider->bar.indic_area.y2;
+            knob_area.y1 = LV_SLIDER_KNOB_COORD_VERTICAL(!is_reversed, slider->bar.indic_area);
         }
         position_knob(obj, &knob_area, knob_size, is_horizontal);
         lv_area_copy(&slider->left_knob_area, &knob_area);
@@ -338,24 +339,21 @@ static void drag_start(lv_obj_t * obj)
     else if(mode == LV_SLIDER_MODE_RANGE) {
         lv_indev_get_point(lv_indev_get_act(), &p);
         lv_obj_transform_point(obj, &p, true, true);
-        bool hor = is_slider_horizontal(obj);
-        lv_base_dir_t base_dir = lv_obj_get_style_base_dir(obj, LV_PART_MAIN);
-
+        const bool is_rtl = LV_BASE_DIR_RTL == lv_obj_get_style_base_dir(obj, LV_PART_MAIN);
+        const bool is_horizontal = is_slider_horizontal(obj);
+        const bool is_reversed = slider->bar.val_reversed ^ (is_rtl && is_horizontal);
         lv_coord_t dist_left, dist_right;
-        if(hor) {
-            if((base_dir != LV_BASE_DIR_RTL && p.x > slider->right_knob_area.x2) || (base_dir == LV_BASE_DIR_RTL &&
-                                                                                     p.x < slider->right_knob_area.x1)) {
+        if(is_horizontal) {
+            if((!is_reversed && p.x > slider->right_knob_area.x2) || (is_reversed && p.x < slider->right_knob_area.x1)) {
                 slider->value_to_set = &slider->bar.cur_value;
             }
-            else if((base_dir != LV_BASE_DIR_RTL && p.x < slider->left_knob_area.x1) || (base_dir == LV_BASE_DIR_RTL &&
-                                                                                         p.x > slider->left_knob_area.x2)) {
+            else if((!is_reversed && p.x < slider->left_knob_area.x1) || (is_reversed && p.x > slider->left_knob_area.x2)) {
                 slider->value_to_set = &slider->bar.start_value;
             }
             else {
                 /*Calculate the distance from each knob*/
                 dist_left = LV_ABS((slider->left_knob_area.x1 + (slider->left_knob_area.x2 - slider->left_knob_area.x1) / 2) - p.x);
                 dist_right = LV_ABS((slider->right_knob_area.x1 + (slider->right_knob_area.x2 - slider->right_knob_area.x1) / 2) - p.x);
-
                 /*Use whichever one is closer*/
                 if(dist_right < dist_left) {
                     slider->value_to_set = &slider->bar.cur_value;
@@ -368,10 +366,10 @@ static void drag_start(lv_obj_t * obj)
             }
         }
         else {
-            if(p.y < slider->right_knob_area.y1) {
+            if((!is_reversed && p.y < slider->right_knob_area.y1) || (is_reversed && p.y > slider->right_knob_area.y2)) {
                 slider->value_to_set = &slider->bar.cur_value;
             }
-            else if(p.y > slider->left_knob_area.y2) {
+            else if((!is_reversed && p.y > slider->left_knob_area.y2) || (is_reversed && p.y < slider->left_knob_area.y1)) {
                 slider->value_to_set = &slider->bar.start_value;
             }
             else {
@@ -424,13 +422,17 @@ static void update_knob_pos(lv_obj_t * obj, bool check_drag)
 
     int32_t new_value = 0;
     const int32_t range = slider->bar.max_value - slider->bar.min_value;
+    const bool is_rtl = LV_BASE_DIR_RTL == lv_obj_get_style_base_dir(obj, LV_PART_MAIN);
+    const bool is_horizontal = is_slider_horizontal(obj);
+    const bool is_reversed = slider->bar.val_reversed ^ (is_rtl && is_horizontal);
+
     if(is_hor) {
         const lv_coord_t bg_left = lv_obj_get_style_pad_left(obj, LV_PART_MAIN);
         const lv_coord_t bg_right = lv_obj_get_style_pad_right(obj, LV_PART_MAIN);
         const lv_coord_t w = lv_obj_get_width(obj);
         const lv_coord_t indic_w = w - bg_left - bg_right;
 
-        if(lv_obj_get_style_base_dir(obj, LV_PART_MAIN) == LV_BASE_DIR_RTL) {
+        if(is_reversed) {
             /*Make the point relative to the indicator*/
             new_value = (obj->coords.x2 - bg_right) - p.x;
         }
@@ -449,9 +451,16 @@ static void update_knob_pos(lv_obj_t * obj, bool check_drag)
         const lv_coord_t h = lv_obj_get_height(obj);
         const lv_coord_t indic_h = h - bg_bottom - bg_top;
 
+        if(is_reversed) {
+            /*Make the point relative to the indicator*/
+            new_value = p.y - (obj->coords.y1 + bg_top);
+        }
+        else {
             /*Make the point relative to the indicator*/
             new_value = p.y - (obj->coords.y2 + bg_bottom);
-        new_value = (-new_value * range + indic_h / 2) / indic_h;
+            new_value = -new_value;
+        }
+        new_value = (new_value * range + indic_h / 2) / indic_h;
         new_value += slider->bar.min_value;
     }
 

src/widgets/slider/lv_slider.h

@@ -166,7 +166,7 @@ bool lv_slider_is_dragged(const lv_obj_t * obj);
 
 /**
  * Get the mode of the slider.
- * @param slider       pointer to a bar object
+ * @param slider       pointer to a slider object
  * @return          see ::lv_slider_mode_t
  */
 static inline lv_slider_mode_t lv_slider_get_mode(lv_obj_t * slider)
@@ -177,6 +177,16 @@ static inline lv_slider_mode_t lv_slider_get_mode(lv_obj_t * slider)
     else return LV_SLIDER_MODE_NORMAL;
 }
 
+/**
+ * Give the slider is in symmetrical mode or not
+ * @param obj       pointer to slider object
+ * @return          true: in symmetrical mode false : not in
+*/
+static inline bool lv_slider_is_symmetrical(lv_obj_t * obj)
+{
+    return lv_bar_is_symmetrical(obj);
+}
+
 /**********************
  *      MACROS
  **********************/

tests/src/test_cases/widgets/test_bar.c

@@ -199,10 +199,9 @@ void test_bar_normal(void)
     lv_obj_set_style_bg_opa(test_bar, LV_OPA_30, LV_PART_MAIN);
     lv_obj_set_style_bg_color(test_bar, bg_color, LV_PART_MAIN);
     lv_obj_set_style_bg_color(test_bar, indic_color, LV_PART_INDICATOR);
-    lv_bar_set_range(test_bar, 0, 100);
+    lv_bar_set_range(test_bar, 100, 0);
     lv_bar_set_value(test_bar, 30, LV_ANIM_OFF);
     lv_obj_set_size(test_bar, h, w);
-    lv_obj_set_style_base_dir(test_bar, LV_BASE_DIR_RTL, 0);
     lv_obj_align(test_bar, LV_ALIGN_TOP_LEFT, x, y);
     TEST_ASSERT_EQUAL_SCREENSHOT("bar_1.png");
 }