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/*************************************************************************** |
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* Copyright (c) 2024 Microsoft Corporation |
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* Copyright (c) 2026-present Eclipse ThreadX contributors |
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* |
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* This program and the accompanying materials are made available under the |
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* terms of the MIT License which is available at |
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* https://opensource.org/licenses/MIT. |
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* |
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* SPDX-License-Identifier: MIT |
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**************************************************************************/ |
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/**************************************************************************/ |
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/**************************************************************************/ |
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/** */ |
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/** GUIX Component */ |
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/** */ |
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/** Radial Slider Management (Slider) */ |
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/** */ |
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/**************************************************************************/ |
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#define GX_SOURCE_CODE |
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/* Include necessary system files. */ |
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#include "gx_api.h" |
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#include "gx_utility.h" |
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#include "gx_radial_slider.h" |
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/**************************************************************************/ |
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/* */ |
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/* FUNCTION RELEASE */ |
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/* */ |
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/* _gx_radial_slider_angle_calculate PORTABLE C */ |
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/* 6.1 */ |
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/* AUTHOR */ |
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/* */ |
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/* Kenneth Maxwell, Microsoft Corporation */ |
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/* */ |
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/* DESCRIPTION */ |
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/* */ |
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/* This service calculates the slider angle according to a point value.*/ |
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/* */ |
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/* INPUT */ |
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/* */ |
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/* slider Radial slider control block */ |
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/* point Point value on radial track */ |
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/* return_value Retrieved angle value */ |
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/* */ |
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/* OUTPUT */ |
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/* */ |
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/* status Completion status */ |
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/* */ |
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/* CALLS */ |
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/* */ |
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/* _gx_utility_math_acos Compute acos value */ |
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/* _gx_utility_math_asin Compute asin value */ |
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/* _gx_utility_math_sqrt Compute sqrt value */ |
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/* */ |
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/* CALLED BY */ |
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/* */ |
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/* GUIX Internal Code */ |
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/* */ |
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/**************************************************************************/ |
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UINT _gx_radial_slider_angle_calculate(GX_RADIAL_SLIDER *slider, GX_POINT point, GX_VALUE *return_value) |
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{ |
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GX_RADIAL_SLIDER_INFO *info; |
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INT new_value; |
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INT dist; |
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INT x_dist; |
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INT y_dist; |
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INT x_center; |
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INT y_center; |
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info = &slider -> gx_radial_slider_info; |
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x_center = slider -> gx_widget_size.gx_rectangle_left + info -> gx_radial_slider_info_xcenter; |
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y_center = slider -> gx_widget_size.gx_rectangle_top + info -> gx_radial_slider_info_ycenter; |
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x_dist = (INT)(point.gx_point_x - x_center); |
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y_dist = (INT)(point.gx_point_y - y_center); |
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dist = (x_dist * x_dist) + (y_dist * y_dist); |
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dist = (INT)_gx_utility_math_sqrt((UINT)dist); |
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✓✓ |
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if (!dist) |
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{ |
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*return_value = 0; |
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return GX_FAILURE; |
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} |
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✓✓ |
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if (point.gx_point_y <= y_center) |
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{ |
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x_dist = GX_FIXED_VAL_MAKE(x_dist) / dist; |
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/* The needle is between [0, 180]. */ |
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new_value = _gx_utility_math_acos(x_dist); |
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} |
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else |
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{ |
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y_dist = (GX_FIXED_VAL_MAKE(y_dist)) / dist; |
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/* The needle is between [180, 360] */ |
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new_value = _gx_utility_math_asin(y_dist); |
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✓✓ |
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if (point.gx_point_x < x_center) |
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{ |
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new_value = 180 + new_value; |
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} |
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else |
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{ |
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new_value = 360 - new_value; |
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} |
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} |
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/* Range value inside specified [-90, 270]*/ |
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✓✓ |
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if (new_value > 270) |
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{ |
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new_value = new_value - 360; |
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} |
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*return_value = (GX_VALUE)new_value; |
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return(GX_SUCCESS); |
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} |
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