lv_slider: draw greater background on negative padding if knob_in == 1

lv_objx/lv_slider.c

@@ -273,11 +273,21 @@ static bool lv_slider_design(lv_obj_t * slider, const lv_area_t * mask, lv_desig
             pad_hor_bg = (lv_area_get_width(&area_bg) - LV_SLIDER_SIZE_MIN) >> 1;
         }
 
-        /*Let space only in the perpendicular directions*/
-        area_bg.x1 += slider_w < slider_h ? pad_hor_bg : 0;   /*Pad only for vertical slider*/
-        area_bg.x2 -= slider_w < slider_h ? pad_hor_bg : 0;   /*Pad only for vertical slider*/
-        area_bg.y1 += slider_w > slider_h ? pad_ver_bg : 0;   /*Pad only for horizontal slider*/
-        area_bg.y2 -= slider_w > slider_h ? pad_ver_bg : 0;   /*Pad only for horizontal slider*/
+        if(ext->knob_in) {  /*Enable extra size if the knob is inside */
+            if(pad_hor_bg < 0) {
+                area_bg.x1 += pad_hor_bg;
+                area_bg.x2 -= pad_hor_bg;
+            }
+            if(pad_ver_bg < 0) {
+                area_bg.y1 += pad_hor_bg;
+                area_bg.y2 -= pad_hor_bg;
+            }
+        } else  { /*Let space only in the perpendicular directions*/
+            area_bg.x1 += slider_w < slider_h ? pad_hor_bg : 0;   /*Pad only for vertical slider*/
+            area_bg.x2 -= slider_w < slider_h ? pad_hor_bg : 0;   /*Pad only for vertical slider*/
+            area_bg.y1 += slider_w > slider_h ? pad_ver_bg : 0;   /*Pad only for horizontal slider*/
+            area_bg.y2 -= slider_w > slider_h ? pad_ver_bg : 0;   /*Pad only for horizontal slider*/
+        }
         lv_draw_rect(&area_bg, mask, style_bg);
 
         /*Draw the indicator*/

lv_themes/lv_theme_alien.c

@@ -366,9 +366,9 @@ static void gauge_init(void)
     lv_style_copy(&gauge_bg, &def);
     gauge_bg.body.main_color = lv_color_hsv_to_rgb(_hue, 10, 70);
     gauge_bg.body.grad_color = gauge_bg.body.main_color;
-    gauge_bg.body.padding.hor = LV_DPI / 12;         /*Scale line length*/
+    gauge_bg.body.padding.hor = LV_DPI / 16;         /*Scale line length*/
     gauge_bg.body.padding.ver = LV_DPI / 10;        /*Needle center size*/
-    gauge_bg.body.padding.inner = LV_DPI / 8;      /*Label - scale distance*/
+    gauge_bg.body.padding.inner = LV_DPI / 12;      /*Label - scale distance*/
     gauge_bg.body.border.color = LV_COLOR_HEX3(0x777);
     gauge_bg.line.color = lv_color_hsv_to_rgb(_hue, 80, 75);
     gauge_bg.line.width = 2;

lv_themes/lv_theme_zen.c

@@ -283,10 +283,10 @@ static void gauge_init(void)
 
     lv_style_copy(&gauge, &def);
     gauge.line.color = lv_color_hsv_to_rgb(_hue, 50, 70);
-    gauge.line.width = 2;
+    gauge.line.width = 1;
     gauge.body.main_color = LV_COLOR_HEX3(0x999);
     gauge.body.grad_color = gauge.body.main_color;
-    gauge.body.padding.hor = LV_DPI / 12;
+    gauge.body.padding.hor = LV_DPI / 16;
     gauge.body.border.color = LV_COLOR_HEX3(0x666);     /*Needle middle color*/
 
     theme.gauge = &gauge;