Merge branch 'color_picker_6' of https://github.com/paulpv/lvgl into paulpv-color_picker_6

README.md

@@ -188,8 +188,8 @@ Styles can be assigned to the objects to changed their appearance. A style descr
 
 You can create a new style like this:
 ```c
-static lv_style_t style1;                 /*Declare a new style. Should be `static`*/
-lv_style_copy(&style1, &lv_style_plain);  /*Copy a buil-in style*/
+static lv_style_t style1;                       /*Declare a new style. Should be `static`*/
+lv_style_copy(&style1, &lv_style_plain);        /*Copy a built-in style*/
 style1.body.main_color = LV_COLOR_RED;          /*Main color*/
 style1.body.grad_color = lv_color_hex(0xffd83c) /*Gradient color (orange)*/
 style1.body.radius = 3;

lvgl.h

@@ -45,6 +45,7 @@ extern "C" {
 #include "src/lv_objx/lv_chart.h"
 #include "src/lv_objx/lv_table.h"
 #include "src/lv_objx/lv_cb.h"
+#include "src/lv_objx/lv_cpicker.h"
 #include "src/lv_objx/lv_bar.h"
 #include "src/lv_objx/lv_slider.h"
 #include "src/lv_objx/lv_led.h"

src/lv_draw/lv_draw_arc.c

@@ -20,7 +20,6 @@
 /**********************
  *  STATIC PROTOTYPES
  **********************/
-static uint16_t fast_atan2(int x, int y);
 static void ver_line(lv_coord_t x, lv_coord_t y, const lv_area_t * mask, lv_coord_t len, lv_color_t color,
                      lv_opa_t opa);
 static void hor_line(lv_coord_t x, lv_coord_t y, const lv_area_t * mask, lv_coord_t len, lv_color_t color,
@@ -100,7 +99,7 @@ void lv_draw_arc(lv_coord_t center_x, lv_coord_t center_y, uint16_t radius, cons
             uint32_t r_act_sqr = xi * xi + yi * yi;
             if(r_act_sqr > r_out_sqr) continue;
 
-            deg_base = fast_atan2(xi, yi) - 180;
+            deg_base = lv_atan2(xi, yi) - 180;
 
             deg = 180 + deg_base;
             if(deg_test(deg, start_angle, end_angle)) {

src/lv_draw/lv_draw_triangle.c

@@ -45,8 +45,7 @@ static void point_swap(lv_point_t * p1, lv_point_t * p2);
  */
 void lv_draw_triangle(const lv_point_t * points, const lv_area_t * mask, const lv_style_t * style, lv_opa_t opa_scale)
 {
-
-    /*Return is the triangle is degenerated*/
+    /*Return if the triangle is degenerated*/
     if(points[0].x == points[1].x && points[0].y == points[1].y) return;
     if(points[1].x == points[2].x && points[1].y == points[2].y) return;
     if(points[0].x == points[2].x && points[0].y == points[2].y) return;

src/lv_misc/lv_math.c

@@ -94,6 +94,110 @@ int32_t lv_bezier3(uint32_t t, int32_t u0, int32_t u1, int32_t u2, int32_t u3)
     return v1 + v2 + v3 + v4;
 }
 
+/**
+ * Calculate the atan2 of a vector.
+ * @param x
+ * @param y
+ * @return the angle in degree calculated from the given parameters in range of [0..360]
+ */
+uint16_t lv_atan2(int x, int y)
+{
+    // Fast XY vector to integer degree algorithm - Jan 2011 www.RomanBlack.com
+    // Converts any XY values including 0 to a degree value that should be
+    // within +/- 1 degree of the accurate value without needing
+    // large slow trig functions like ArcTan() or ArcCos().
+    // NOTE! at least one of the X or Y values must be non-zero!
+    // This is the full version, for all 4 quadrants and will generate
+    // the angle in integer degrees from 0-360.
+    // Any values of X and Y are usable including negative values provided
+    // they are between -1456 and 1456 so the 16bit multiply does not overflow.
+
+    unsigned char negflag;
+    unsigned char tempdegree;
+    unsigned char comp;
+    unsigned int degree;     // this will hold the result
+    //signed int x;            // these hold the XY vector at the start
+    //signed int y;            // (and they will be destroyed)
+    unsigned int ux;
+    unsigned int uy;
+
+    // Save the sign flags then remove signs and get XY as unsigned ints
+    negflag = 0;
+    if(x < 0) {
+        negflag += 0x01;    // x flag bit
+        x = (0 - x);        // is now +
+    }
+    ux = x;                // copy to unsigned var before multiply
+    if(y < 0) {
+        negflag += 0x02;    // y flag bit
+        y = (0 - y);        // is now +
+    }
+    uy = y;                // copy to unsigned var before multiply
+
+    // 1. Calc the scaled "degrees"
+    if(ux > uy) {
+        degree = (uy * 45) / ux;   // degree result will be 0-45 range
+        negflag += 0x10;    // octant flag bit
+    } else {
+        degree = (ux * 45) / uy;   // degree result will be 0-45 range
+    }
+
+    // 2. Compensate for the 4 degree error curve
+    comp = 0;
+    tempdegree = degree;    // use an unsigned char for speed!
+    if(tempdegree > 22) {    // if top half of range
+        if(tempdegree <= 44) comp++;
+        if(tempdegree <= 41) comp++;
+        if(tempdegree <= 37) comp++;
+        if(tempdegree <= 32) comp++;  // max is 4 degrees compensated
+    } else { // else is lower half of range
+        if(tempdegree >= 2) comp++;
+        if(tempdegree >= 6) comp++;
+        if(tempdegree >= 10) comp++;
+        if(tempdegree >= 15) comp++;  // max is 4 degrees compensated
+    }
+    degree += comp;   // degree is now accurate to +/- 1 degree!
+
+    // Invert degree if it was X>Y octant, makes 0-45 into 90-45
+    if(negflag & 0x10) degree = (90 - degree);
+
+    // 3. Degree is now 0-90 range for this quadrant,
+    // need to invert it for whichever quadrant it was in
+    if(negflag & 0x02) { // if -Y
+        if(negflag & 0x01)   // if -Y -X
+            degree = (180 + degree);
+        else        // else is -Y +X
+            degree = (180 - degree);
+    } else { // else is +Y
+        if(negflag & 0x01)   // if +Y -X
+            degree = (360 - degree);
+    }
+    return degree;
+}
+
+/**
+ * Calculate the sqrt of an integer.
+ * @param x
+ * @return the sqrt of x
+ */
+uint16_t lv_sqrt(uint32_t x)
+{
+    uint16_t res=0;
+    uint16_t add= 0x8000;
+    int i;
+    for(i=0;i<16;i++)
+    {
+        uint16_t temp=res | add;
+        uint32_t g2=temp*temp;
+        if (x>=g2)
+        {
+            res=temp;
+        }
+        add>>=1;
+    }
+    return res;
+}
+
 /**********************
  *   STATIC FUNCTIONS
  **********************/

src/lv_misc/lv_math.h

@@ -54,6 +54,21 @@ int16_t lv_trigo_sin(int16_t angle);
  */
 int32_t lv_bezier3(uint32_t t, int32_t u0, int32_t u1, int32_t u2, int32_t u3);
 
+/**
+ * Calculate the atan2 of a vector.
+ * @param x
+ * @param y
+ * @return the angle in degree calculated from the given parameters in range of [0..360]
+ */
+uint16_t lv_atan2(int x, int y);
+
+/**
+ * Calculate the sqrt of an integer.
+ * @param x
+ * @return the sqrt of x
+ */
+uint16_t lv_sqrt(uint32_t x);
+
 /**********************
  *      MACROS
  **********************/

src/lv_objx/lv_cpicker.h

@@ -0,0 +1,233 @@
+/**
+ * @file lv_cpicker.h
+ *
+ */
+
+#ifndef LV_CPICKER_H
+#define LV_CPICKER_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*********************
+ *      INCLUDES
+ *********************/
+#ifdef LV_CONF_INCLUDE_SIMPLE
+#include "lv_conf.h"
+#else
+#include "../../../lv_conf.h"
+#endif
+
+#if LV_USE_CPICKER != 0
+
+#include "../lv_core/lv_obj.h"
+
+/*********************
+ *      DEFINES
+ *********************/
+
+/**********************
+ *      TYPEDEFS
+ **********************/
+/*Data of colorpicker*/
+typedef struct {
+    uint16_t hue;
+    uint8_t saturation;
+    uint8_t value;
+    struct
+    {
+        lv_style_t * style;
+        uint8_t type;
+    } indicator;
+    uint16_t prev_hue;
+    uint8_t prev_saturation;
+    uint8_t prev_value;
+    uint16_t prev_pos;
+    uint8_t color_mode:2;
+    uint8_t color_mode_fixed:1;
+    uint8_t type:1;
+    uint32_t last_click;
+    lv_area_t rect_preview_area;
+    lv_area_t rect_gradient_area;
+    lv_coord_t rect_gradient_w;
+    lv_coord_t rect_gradient_h;
+} lv_cpicker_ext_t;
+
+/*Styles*/
+enum {
+    LV_CPICKER_STYLE_MAIN,
+    LV_CPICKER_STYLE_INDICATOR,
+};
+typedef uint8_t lv_cpicker_style_t;
+
+enum {
+    LV_CPICKER_INDICATOR_NONE,
+    LV_CPICKER_INDICATOR_LINE,
+    LV_CPICKER_INDICATOR_CIRCLE,
+    LV_CPICKER_INDICATOR_IN
+};
+typedef uint8_t lv_cpicker_indicator_type_t;
+
+enum {
+    LV_CPICKER_TYPE_RECT,
+    LV_CPICKER_TYPE_DISC,
+};
+typedef uint8_t lv_cpicker_type_t;
+
+enum {
+    LV_CPICKER_COLOR_MODE_HUE,
+    LV_CPICKER_COLOR_MODE_SATURATION,
+    LV_CPICKER_COLOR_MODE_VALUE
+};
+typedef uint8_t lv_cpicker_color_mode_t;
+
+/**********************
+ * GLOBAL PROTOTYPES
+ **********************/
+
+/**
+ * Create a colorpicker objects
+ * @param par pointer to an object, it will be the parent of the new colorpicker
+ * @param copy pointer to a colorpicker object, if not NULL then the new object will be copied from it
+ * @return pointer to the created colorpicker
+ */
+lv_obj_t * lv_cpicker_create(lv_obj_t * par, const lv_obj_t * copy);
+
+/*=====================
+ * Setter functions
+ *====================*/
+
+/**
+ * Set a new type for a colorpicker
+ * @param cpicker pointer to a colorpicker object
+ * @param type new type of the colorpicker (from 'lv_cpicker_type_t' enum)
+ */
+void lv_cpicker_set_type(lv_obj_t * chart, lv_cpicker_type_t type);
+
+/**
+ * Set a style of a colorpicker.
+ * @param cpicker pointer to colorpicker object
+ * @param type which style should be set
+ * @param style pointer to a style
+ */
+void lv_cpicker_set_style(lv_obj_t * cpicker, lv_cpicker_style_t type, lv_style_t *style);
+
+/**
+ * Set a type of a colorpicker indicator.
+ * @param cpicker pointer to colorpicker object
+ * @param type indicator type
+ */
+void lv_cpicker_set_indicator_type(lv_obj_t * cpicker, lv_cpicker_indicator_type_t type);
+
+/**
+ * Set the current hue of a colorpicker.
+ * @param cpicker pointer to colorpicker object
+ * @param hue current selected hue
+ */
+void lv_cpicker_set_hue(lv_obj_t * cpicker, uint16_t hue);
+
+/**
+ * Set the current saturation of a colorpicker.
+ * @param cpicker pointer to colorpicker object
+ * @param saturation current selected saturation
+ */
+void lv_cpicker_set_saturation(lv_obj_t * cpicker, uint8_t saturation);
+
+/**
+ * Set the current value of a colorpicker.
+ * @param cpicker pointer to colorpicker object
+ * @param val current selected value
+ */
+void lv_cpicker_set_value(lv_obj_t * cpicker, uint8_t val);
+
+/**
+ * Set the current color of a colorpicker.
+ * @param cpicker pointer to colorpicker object
+ * @param color current selected color
+ */
+void lv_cpicker_set_color(lv_obj_t * cpicker, lv_color_t color);
+
+/**
+ * Set the current color mode.
+ * @param cpicker pointer to colorpicker object
+ * @param mode color mode (hue/sat/val)
+ */
+void lv_cpicker_set_color_mode(lv_obj_t * cpicker, lv_cpicker_color_mode_t mode);
+
+/**
+ * Set if the color mode is changed on long press on center
+ * @param cpicker pointer to colorpicker object
+ * @param fixed color mode cannot be changed on long press
+ */
+void lv_cpicker_set_color_mode_fixed(lv_obj_t * cpicker, bool fixed);
+
+/*=====================
+ * Getter functions
+ *====================*/
+
+/**
+ * Get the current color mode.
+ * @param cpicker pointer to colorpicker object
+ * @return color mode (hue/sat/val)
+ */
+lv_cpicker_color_mode_t lv_cpicker_get_color_mode(lv_obj_t * cpicker);
+
+/**
+ * Get if the color mode is changed on long press on center
+ * @param cpicker pointer to colorpicker object
+ * @return mode cannot be changed on long press
+ */
+bool lv_cpicker_get_color_mode_fixed(lv_obj_t * cpicker);
+
+/**
+ * Get style of a colorpicker.
+ * @param cpicker pointer to colorpicker object
+ * @param type which style should be get
+ * @return style pointer to the style
+ */
+lv_style_t * lv_cpicker_get_style(const lv_obj_t * cpicker, lv_cpicker_style_t type);
+
+/**
+ * Get the current hue of a colorpicker.
+ * @param cpicker pointer to colorpicker object
+ * @return hue current selected hue
+ */
+uint16_t lv_cpicker_get_hue(lv_obj_t * cpicker);
+
+/**
+ * Get the current saturation of a colorpicker.
+ * @param cpicker pointer to colorpicker object
+ * @return current selected saturation
+ */
+uint8_t lv_cpicker_get_saturation(lv_obj_t * cpicker);
+
+/**
+ * Get the current hue of a colorpicker.
+ * @param cpicker pointer to colorpicker object
+ * @return current selected value
+ */
+uint8_t lv_cpicker_get_value(lv_obj_t * cpicker);
+
+/**
+ * Get the current selected color of a colorpicker.
+ * @param cpicker pointer to colorpicker object
+ * @return color current selected color
+ */
+lv_color_t lv_cpicker_get_color(lv_obj_t * cpicker);
+
+/*=====================
+ * Other functions
+ *====================*/
+
+/**********************
+ *      MACROS
+ **********************/
+
+#endif  /*LV_USE_CPICKER*/
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif  /*LV_CPICKER_H*/

src/lv_objx/lv_objx.mk

@@ -1,6 +1,7 @@
 CSRCS += lv_arc.c
 CSRCS += lv_bar.c
 CSRCS += lv_cb.c
+CSRCS += lv_cpicker.c
 CSRCS += lv_ddlist.c
 CSRCS += lv_kb.c
 CSRCS += lv_line.c