1 /*************************************************************************** 2 * Copyright (c) 2024 Microsoft Corporation 3 * 4 * This program and the accompanying materials are made available under the 5 * terms of the MIT License which is available at 6 * https://opensource.org/licenses/MIT. 7 * 8 * SPDX-License-Identifier: MIT 9 **************************************************************************/ 10 11 12 /**************************************************************************/ 13 /**************************************************************************/ 14 /** */ 15 /** GUIX Component */ 16 /** */ 17 /** Scroll Wheel Management (Scroll Wheel) */ 18 /** */ 19 /**************************************************************************/ 20 21 #define GX_SOURCE_CODE 22 23 24 /* Include necessary system files. */ 25 26 #include "gx_api.h" 27 #include "gx_scroll_wheel.h" 28 #include "gx_system.h" 29 30 /**************************************************************************/ 31 /* */ 32 /* FUNCTION RELEASE */ 33 /* */ 34 /* _gx_scroll_wheel_selected_set PORTABLE C */ 35 /* 6.1.7 */ 36 /* AUTHOR */ 37 /* */ 38 /* Kenneth Maxwell, Microsoft Corporation */ 39 /* */ 40 /* DESCRIPTION */ 41 /* */ 42 /* This function sets the current selected row index for scroll wheel */ 43 /* widget. */ 44 /* */ 45 /* INPUT */ 46 /* */ 47 /* wheel Scroll wheel control block */ 48 /* row Selected row to be set */ 49 /* */ 50 /* OUTPUT */ 51 /* */ 52 /* status Completion status */ 53 /* */ 54 /* CALLS */ 55 /* */ 56 /* None */ 57 /* */ 58 /* CALLED BY */ 59 /* */ 60 /* Application Code */ 61 /* GUIX Internal Code */ 62 /* */ 63 /* RELEASE HISTORY */ 64 /* */ 65 /* DATE NAME DESCRIPTION */ 66 /* */ 67 /* 05-19-2020 Kenneth Maxwell Initial Version 6.0 */ 68 /* 09-30-2020 Kenneth Maxwell Modified comment(s), */ 69 /* resulting in version 6.1 */ 70 /* 06-02-2021 Ting Zhu Modified comment(s), */ 71 /* improved logic, */ 72 /* resulting in version 6.1.7 */ 73 /* */ 74 /**************************************************************************/ _gx_scroll_wheel_selected_set(GX_SCROLL_WHEEL * wheel,INT row)75UINT _gx_scroll_wheel_selected_set(GX_SCROLL_WHEEL *wheel, INT row) 76 { 77 INT dist; 78 79 if ((row < 0) || (wheel -> gx_scroll_wheel_total_rows == 0)) 80 { 81 row = 0; 82 } 83 else if (row > wheel -> gx_scroll_wheel_total_rows - 1) 84 { 85 row = wheel -> gx_scroll_wheel_total_rows - 1; 86 } 87 88 if (wheel -> gx_scroll_wheel_selected_row == row) 89 { 90 return GX_SUCCESS; 91 } 92 93 if (wheel -> gx_widget_status & GX_STATUS_VISIBLE) 94 { 95 if (wheel -> gx_scroll_wheel_wrap_style_check(wheel)) 96 { 97 if (GX_ABS(wheel -> gx_scroll_wheel_selected_row - row) < 98 GX_ABS(wheel -> gx_scroll_wheel_selected_row + wheel -> gx_scroll_wheel_total_rows - row)) 99 { 100 dist = wheel -> gx_scroll_wheel_selected_row - row; 101 } 102 else 103 { 104 dist = wheel -> gx_scroll_wheel_selected_row + wheel -> gx_scroll_wheel_total_rows - row; 105 } 106 } 107 else 108 { 109 dist = wheel -> gx_scroll_wheel_selected_row - row; 110 } 111 112 wheel -> gx_scroll_wheel_animation_steps = 10; 113 wheel -> gx_scroll_wheel_animation_speed = (GX_VALUE)(dist * wheel -> gx_scroll_wheel_row_height) / 10; 114 wheel -> gx_scroll_wheel_shift_error = (GX_BYTE)(dist * wheel -> gx_scroll_wheel_row_height) % 10; 115 _gx_system_timer_start((GX_WIDGET *)wheel, GX_ANIMATION_TIMER, 2, 2); 116 } 117 else 118 { 119 wheel -> gx_scroll_wheel_selected_row = row; 120 } 121 122 return GX_SUCCESS; 123 } 124 125
